IP Library › Granted Patent US 12,676,362
Granted Patent B2
US 12,676,362 · App. 18/459,392 · Granted Jul 7, 2026

Battery heating device and control method and circuit therefor, and power device

Inventors: Xiaojian Huang (Ningde, CN); Xianxi Pan (Ningde, CN); Zhimin Dan (Ningde, CN)
Assignee: CONTEMPORARY AMPEREX TECHNOLOGY (HONG KONG) LIMITED
H01M10/657B60L58/27H01M10/4264H01M10/615H01M10/625H01M10/63B60L50/64H01M2220/20
View Patent ↗
Loading inventors, assignments & file history…
Monitor This Case
Get email alerts when status or documents change.
Order Certified Copies
Most orders are placed with the USPTO same day — all within 24 business hours.
Order via The Patent Place →
Pre-filled with this patent's details
Quick Facts
Patent No.
US 12,676,362
App. No.
18/459,392
Filed
Aug 31, 2023
Granted
Jul 7, 2026
Kind
B2
Art Unit
1725
USPC
429/7
Abstract

Provided are a battery heating device and a control method and circuit therefor, and a power device. The battery heating device includes: a heating module including a first bridge arm, a second bridge arm, and an energy storage element; and a control module configured to control the first bridge arm and the second bridge arm, to form a circuit for discharging from a first battery cell to the energy storage element and a circuit for charging from the energy storage element and the first battery cell to a second battery cell, and/or to form a circuit for discharging from the second battery cell to the energy storage element and a circuit for charging from the energy storage element and the second battery cell to the first battery cell, for heating of the first battery cell and the second battery cell.

Claims (66)

1 . A battery heating device, which is connected to a traction battery and configured to heat the traction battery, wherein the traction battery comprises a first battery cell and a second battery cell, the battery heating device comprising:

a heating module comprising a first bridge arm, a second bridge arm, and an energy storage element; and

a control module configured to control the first bridge arm and the second bridge arm, to form a circuit for discharging from the first battery cell to the energy storage element and a circuit for charging from the energy storage element and the first battery cell to the second battery cell, and/or to form a circuit for discharging from the second battery cell to the energy storage element and a circuit for charging from the energy storage element and the second battery cell to the first battery cell, for heating of the first battery cell and the second battery cell;

wherein a state switching switch is connected between the first end of the first battery cell and the first end of the second battery cell, or a state switching switch is connected between the second end of the first battery cell and the second end of the second battery cell; and wherein the control module is further configured to:

control the state switching switch to be opened, so that the first battery cell is connected in series with the second battery cell.

2 . The battery heating device according to claim 1 , wherein

a first end of the first bridge arm is connected to a first end of the first battery cell, a first end of the second bridge arm is connected to a first end of the second battery cell, and a second end of the first bridge arm, a second end of the second bridge arm, and a second end of the first battery cell are connected to a second end of the second battery cell, wherein the first bridge arm comprises a first sub-bridge arm and a second sub-bridge arm, and the second bridge arm comprises a third sub-bridge arm and a fourth sub-bridge arm; and

the first end of the first battery cell is a positive electrode of the first battery cell, the second end of the first battery cell is a negative electrode of the first battery cell, the first end of the second battery cell is a positive electrode of the second battery cell, and the second end of the second battery cell is a negative electrode of the second battery cell; or the first end of the first battery cell is a negative electrode of the first battery cell, the second end of the first battery cell is a positive electrode of the first battery cell, the first end of the second battery cell is a negative electrode of the second battery cell, and the second end of the second battery cell is a positive electrode of the second battery cell.

3 . The battery heating device according to claim 2 , wherein

a first end of the energy storage element is connected between the first sub-bridge arm and the second sub-bridge arm, and a second end of the energy storage element is connected between the third sub-bridge arm and the fourth sub-bridge arm; or

a first end of the energy storage element is connected to the second end of the first bridge arm, and a second end of the energy storage element is connected to the second end of the second bridge arm.

4 . The battery heating device according to claim 3 , wherein the control module is configured to:

control the first sub-bridge arm and the fourth sub-bridge arm to be switched on at the same time, to form a circuit, which comprises the first battery cell, the first sub-bridge arm, the energy storage element, and the fourth sub-bridge arm, for discharging from the first battery cell to the energy storage element;

control the first sub-bridge arm and the third sub-bridge arm to be switched on at the same time, to form a circuit, which comprises the first battery cell, the first sub-bridge arm, the energy storage element, the third sub-bridge arm, and the second battery cell, for charging from the first battery cell and the energy storage element to the second battery cell;

control the second sub-bridge arm and the third sub-bridge arm to be switched on at the same time, to form a circuit, which comprises the second battery cell, the third sub-bridge arm, the energy storage element, and the second sub-bridge arm, for discharging from the second battery cell to the energy storage element; and

control the first sub-bridge arm and the third sub-bridge arm to be switched on at the same time, to form a circuit, which comprises the second battery cell, the third sub-bridge arm, the energy storage element, the first sub-bridge arm, and the first battery cell, for charging from the second battery cell and the energy storage element to the first battery cell.

5 . The battery heating device according to claim 2 , wherein

a first end of the energy storage element is connected between the first sub-bridge arm and the second sub-bridge arm, and a second end of the energy storage element is connected between the third sub-bridge arm and the fourth sub-bridge arm; or

a first end of the energy storage element is connected to the first end of the first bridge arm, and a second end of the energy storage element is connected to the first end of the second bridge arm.

6 . The battery heating device according to claim 5 , wherein the control module is specifically configured to:

control the second sub-bridge arm and the third sub-bridge arm to be switched on at the same time, to form a circuit, which comprises the first battery cell, the second sub-bridge arm, the energy storage element, and the third sub-bridge arm, for discharging from the first battery cell to the energy storage element;

control the second sub-bridge arm and the fourth sub-bridge arm to be switched on at the same time, to form a circuit, which comprises the first battery cell, the second sub-bridge arm, the energy storage element, the fourth sub-bridge arm, and the second battery cell, for charging from the first battery cell and the energy storage element to the second battery cell;

control the first sub-bridge arm and the fourth sub-bridge arm to be switched on at the same time, to form a circuit, which comprises the second battery cell, the fourth sub-bridge arm, the energy storage element, and the first sub-bridge arm, for discharging from the second battery cell to the energy storage element; and

control the second sub-bridge arm and the fourth sub-bridge arm to be switched on at the same time, to form a circuit, which comprises the second battery cell, the fourth sub-bridge arm, the energy storage element, the second sub-bridge arm, and the first battery cell, for charging from the second battery cell and the energy storage element to the first battery cell.

7 . The battery heating device according to claim 2 , wherein

the first sub-bridge arm comprises a first switch transistor, the second sub-bridge arm comprises a second switch transistor, the third sub-bridge arm comprises a third switch transistor, and the fourth sub-bridge arm comprises a fourth switch transistor,

wherein the control module implements the switching on and off of the first sub-bridge arm, the second sub-bridge arm, the third sub-bridge arm, and the fourth sub-bridge arm respectively by controlling the first switch transistor, the second switch transistor, the third switch transistor, and the fourth switch transistor.

8 . The battery heating device according to claim 1 , wherein a second capacitor is connected in parallel to the first battery cell at the two ends, and a third capacitor is connected in parallel to the second battery cell at the two ends.

9 . A power device, comprising:

a traction battery comprising a first battery cell and a second battery cell;

a battery heating device according to claim 1 , which is connected to the traction battery and configured to heat the traction battery; and

a motor, wherein a drive circuit of the motor is connected to the traction battery, and the traction battery is configured to provide power to the drive circuit.

10 . A control method for a battery heating device, which is connected to a traction battery and configured to heat the traction battery, wherein the battery heating device comprises a first bridge arm, a second bridge arm, and an energy storage element, and the traction battery comprises a first battery cell and a second battery cell, the control method comprising:

controlling the first bridge arm and the second bridge arm, to form a circuit for discharging from the first battery cell to the energy storage element and a circuit for charging from the energy storage element and the first battery cell to the second battery cell, and/or to form a circuit for discharging from the second battery cell to the energy storage element and a circuit for charging from the energy storage element and the second battery cell to the first battery cell, for heating of the first battery cell and the second battery cell;

wherein a state switching switch is connected between the first end of the first battery cell and the first end of the second battery cell, or a state switching switch is connected between the second end of the first battery cell and the second end of the second battery cell; and wherein the control method further comprises:

controlling the state switching switch to be opened, so that the first battery cell is connected in series with the second battery cell.

11 . The control method according to claim 10 , wherein

a first end of the first bridge arm is connected to a first end of the first battery cell, a first end of the second bridge arm is connected to a first end of the second battery cell, and a second end of the first bridge arm, a second end of the second bridge arm, and a second end of the first battery cell are connected to a second end of the second battery cell, wherein the first bridge arm comprises a first sub-bridge arm and a second sub-bridge arm, and the second bridge arm comprises a third sub-bridge arm and a fourth sub-bridge arm; and

the first end of the first battery cell and the first end of the second battery cell are positive electrodes, and the second end of the first battery cell and the second end of the second battery cell are negative electrodes; or the first end of the first battery cell and the first end of the second battery cell are negative electrodes, and the second end of the first battery cell and the second end of the second battery cell are positive electrodes.

12 . The control method according to claim 11 , wherein

a first end of the energy storage element is connected between the first sub-bridge arm and the second sub-bridge arm, and a second end of the energy storage element is connected between the third sub-bridge arm and the fourth sub-bridge arm; or

a first end of the energy storage element is connected to the second end of the first bridge arm, and a second end of the energy storage element is connected to the second end of the second bridge arm.

13 . The control method according to claim 12 , wherein the controlling the first bridge arm and the second bridge arm comprises:

receiving a heating request message; and

generating a first control signal based on the heating request message, wherein the first control signal is used to:

control the first sub-bridge arm and the fourth sub-bridge arm to be switched on at the same time, to form a circuit, which comprises the first battery cell, the first sub-bridge arm, the energy storage element, and the fourth sub-bridge arm, for discharging from the first battery cell to the energy storage element;

control the first sub-bridge arm and the third sub-bridge arm to be switched on at the same time, to form a circuit, which comprises the first battery cell, the first sub-bridge arm, the energy storage element, the third sub-bridge arm, and the second battery cell, for charging from the first battery cell and the energy storage element to the second battery cell;

control the second sub-bridge arm and the third sub-bridge arm to be switched on at the same time, to form a circuit, which comprises the second battery cell, the third sub-bridge arm, the energy storage element, and the second sub-bridge arm, for discharging from the second battery cell to the energy storage element; and

control the first sub-bridge arm and the third sub-bridge arm to be switched on at the same time, to form a circuit, which comprises the second battery cell, the third sub-bridge arm, the energy storage element, the first sub-bridge arm, and the first battery cell, for charging from the second battery cell and the energy storage element to the first battery cell.

14 . The control method according to claim 13 , wherein the control method further comprises:

receiving a heating stop message; and

generating a second control signal based on the heating stop message, wherein the second control signal is used to control the battery heating device to stop heating the traction battery.

15 . The control method according to claim 11 , wherein

a first end of the energy storage element is connected between the first sub-bridge arm and the second sub-bridge arm, and a second end of the energy storage element is connected between the third sub-bridge arm and the fourth sub-bridge arm; or

a first end of the energy storage element is connected to the first end of the first bridge arm, and a second end of the energy storage element is connected to the first end of the second bridge arm.

16 . The control method according to claim 15 , wherein the controlling the first bridge arm and the second bridge arm comprises:

receiving a heating request message; and

generating a third control signal based on the heating request message, wherein the third control signal is used to:

control the second sub-bridge arm and the third sub-bridge arm to be switched on at the same time, to form a circuit, which comprises the first battery cell, the second sub-bridge arm, the energy storage element, and the third sub-bridge arm, for discharging from the first battery cell to the energy storage element;

control the second sub-bridge arm and the fourth sub-bridge arm to be switched on at the same time, to form a circuit, which comprises the first battery cell, the second sub-bridge arm, the energy storage element, the fourth sub-bridge arm, and the second battery cell, for charging from the first battery cell and the energy storage element to the second battery cell;

control the first sub-bridge arm and the fourth sub-bridge arm to be switched on at the same time, to form a circuit, which comprises the second battery cell, the fourth sub-bridge arm, the energy storage element, and the first sub-bridge arm, for discharging from the second battery cell to the energy storage element; and

control the second sub-bridge arm and the fourth sub-bridge arm to be switched on at the same time, to form a circuit, which comprises the second battery cell, the fourth sub-bridge arm, the energy storage element, the second sub-bridge arm, and the first battery cell, for charging from the second battery cell and the energy storage element to the first battery cell.

17 . The control method according to claim 11 , wherein

the first sub-bridge arm comprises a first switch transistor, the second sub-bridge arm comprises a second switch transistor, the third sub-bridge arm comprises a third switch transistor, and the fourth sub-bridge arm comprises a fourth switch transistor,

wherein the switching on and off of the first sub-bridge arm, the second sub-bridge arm, the third sub-bridge arm, and the fourth sub-bridge arm are respectively implemented by controlling the first switch transistor, the second switch transistor, the third switch transistor, and the fourth switch transistor.

18 . The control method according to claim 10 , wherein a second capacitor is connected in parallel to the first battery cell at the two ends, and a third capacitor is connected in parallel to the second battery cell at the two ends.

Assignments (2)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Aug 6, 2024
From: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED
To: CONTEMPORARY AMPEREX TECHNOLOGY (HONG KONG) LIMITED
Reel/Frame 068338/0402 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Aug 31, 2023
From: HUANG, XIAOJIAN; PAN, XIANXI; DAN, ZHIMIN
To: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED
Reel/Frame 064769/0705 →
Continuity (2)
Continuation PCTCN2021116736 · Sep 6, 2021
Related Publication 20230411734A1 · Dec 21, 2023
References Cited (116)
US 7990098B2 · Perisic et al. · 2011 [cited by applicant]
US 8452490B2 · Lakirovich et al. · 2013 [cited by applicant]
US 9975447B2 · Tokushige et al. · 2018 [cited by applicant]
US 20020024221A1 · Grewe et al. · 2002 [cited by applicant]
US 20020096886A1 · Schmitz et al. · 2002 [cited by applicant]
US 20110144861A1 · Lakirovich et al. · 2011 [cited by applicant]
US 20120176082A1 · Lee et al. · 2012 [cited by applicant]
US 20120301755A1 · Axelsson et al. · 2012 [cited by applicant]
US 20140287293A1 · Gross · 2014 [cited by applicant]
US 20140358352A1 · Yamamoto · 2014 [cited by applicant]
US 20160318418A1 · Tokushige et al. · 2016 [cited by applicant]
US 20190305393A1 · Oguma · 2019 [cited by applicant]
US 20200168959A1 · Hettrich · 2020 [cited by applicant]
US 20200207237A1 · Zuo et al. · 2020 [cited by applicant]
US 20200235439A1 · Frost et al. · 2020 [cited by applicant]
US 20210061128A1 · Lee et al. · 2021 [cited by applicant]
US 20210143684A1 · Sumiya · 2021 [cited by applicant]
US 20210354592A1 · Zuo et al. · 2021 [cited by applicant]
US 20230023717A1 · Tzeng et al. · 2023 [cited by applicant]
US 20230238603A1 · Lian · 2023 [cited by examiner]
CN 202042565U · 2011 [cited by applicant]
CN 104118331A · 2014 [cited by applicant]
CN 105932363A · 2016 [cited by applicant]
CN 106025443A · 2016 [cited by applicant]
CN 107039708A · 2017 [cited by applicant]
CN 107069145A · 2017 [cited by applicant]
CN 109823234A · 2019 [cited by applicant]
CN 109962660A · 2019 [cited by applicant]
CN 110015202A · 2019 [cited by applicant]
CN 110116653A · 2019 [cited by applicant]
CN 110789400A · 2020 [cited by applicant]
CN 110962692A · 2020 [cited by applicant]
CN 111347900A · 2020 [cited by applicant]
CN 111347924A · 2020 [cited by applicant]
CN 111347937A · 2020 [cited by applicant]
CN 111355430A · 2020 [cited by applicant]
CN 111391717A · 2020 [cited by applicant]
CN 111391718A · 2020 [cited by applicant]
CN 111434513A · 2020 [cited by applicant]
CN 111446519A · 2020 [cited by applicant]
CN 111660875A · 2020 [cited by applicant]
CN 112389214A · 2021 [cited by applicant]
CN 212587580U · 2021 [cited by applicant]
CN 112510272A · 2021 [cited by applicant]
CN 112550079A · 2021 [cited by applicant]
CN 112810467A · 2021 [cited by applicant]
CN 112821842A · 2021 [cited by applicant]
CN 112977171A · 2021 [cited by applicant]
CN 113043870A · 2021 [cited by applicant]
CN 113071346A · 2021 [cited by applicant]
CN 113119802A · 2021 [cited by applicant]
CN 213734669U · 2021 [cited by applicant]
CN 113506934A · 2021 [cited by applicant]
DE 102013226372A1 · 2015 [cited by applicant]
JP 2004112903A · 2004 [cited by applicant]
JP 2004336844A · 2004 [cited by applicant]
JP 2011188600A · 2011 [cited by applicant]
JP 2013187919A · 2013 [cited by applicant]
JP 2014067697A · 2014 [cited by applicant]
JP 2014226000A · 2014 [cited by applicant]
JP 2016170000A · 2016 [cited by applicant]
JP 2017212764A · 2017 [cited by applicant]
JP 2020110042A · 2020 [cited by applicant]
JP 2021002513A · 2021 [cited by applicant]
JP 2021012853A · 2021 [cited by applicant]
JP 2021013226A · 2021 [cited by applicant]
JP 2021044949A · 2021 [cited by applicant]
JP 2021093845A · 2021 [cited by applicant]
KR 20200139201A · 2020 [cited by applicant]
KR 1020200140919A · 2020 [cited by applicant]
WO 2018030143A1 · 2018 [cited by applicant]
WO 2019244680A1 · 2019 [cited by applicant]
WO 2020125770A1 · 2020 [cited by applicant]
WO 2020125771A1 · 2020 [cited by applicant]
WO 2020259071A1 · 2020 [cited by applicant]
WO 2021000784A1 · 2021 [cited by applicant]
WO 2021027879A1 · 2021 [cited by applicant]
WO 2021019608A1 · 2021 [cited by applicant]
WO 2021057339A1 · 2021 [cited by applicant]
WO 2021106195A1 · 2021 [cited by applicant]
WO 2021135888A1 · 2021 [cited by applicant]
Notice of Reasons for Refusal received in the corresponding Japanese application 2023-524100, mailed Apr. 22, 2024. [cited by applicant]
Notice of Reasons for Refusal received in the corresponding Japanese application 2021-574847, mailed Feb. 13, 2024. [cited by applicant]
Notice of Allowance received in the counterpart U.S. Appl. No. 17/562,562, mailed on Jan. 6, 2025. [cited by applicant]
Notice of Reasons for Refusal received in the counterpart Japanese application 2024-507051, mailed on Jan. 21, 2025. [cited by applicant]
Request for the Submission of an Opinion received in the counterpart Korean application 10-2023-7020324, mailed on Feb. 13, 2025. [cited by applicant]
Notice of Reasons for Refusal received in the counterpart Japanese application 2024-514462, on Mar. 11, 2025. [cited by applicant]
Notification of Registration received in the corresponding Chinese application 202280004716.1, mailed Oct. 23, 2023. [cited by applicant]
Notice of Reasons for Refusal received in the corresponding Japanese application 2021-574847, mailed Oct. 10, 2023. [cited by applicant]
Notification of Registration received in the corresponding Chinese application 202180048180.9, mailed Oct. 16, 2023. [cited by applicant]
Notification of Registration received in the corresponding Chinese application 202280004725.0, mailed Nov. 9, 2023. [cited by applicant]
The extended European search report received in the corresponding European application 21964480.4, mailed on Aug. 12, 2024. [cited by applicant]
The extended European search report received in the corresponding European application 22851620.9, mailed on Oct. 23, 2024. [cited by applicant]
The international search report received in the corresponding international application PCT/CN2021/116736, mailed Apr. 14, 2022. [cited by applicant]
The written opinion received in the corresponding international application PCT/CN2021/116736, mailed Apr. 14, 2022. [cited by applicant]
The international search report received in the corresponding international application PCT/CN2022/088187, mailed Jun. 28, 2022. [cited by applicant]
The written opinion received in the corresponding international application PCT/CN2022/088187, mailed Jun. 28, 2022. [cited by applicant]
The international search report received in the corresponding international application PCT/CN2021/116735, mailed Apr. 1, 2022. [cited by applicant]
The written opinion received in the corresponding international application PCT/CN2021/116735, mailed Apr. 1, 2022. [cited by applicant]
The international search report received in the corresponding international application PCT/CN2022/088567, mailed Jul. 1, 2022. [cited by applicant]
The written opinion received in the corresponding international application PCT/CN2022/088567, mailed Jul. 1, 2022. [cited by applicant]
The international search report received in the corresponding international application PCT/CN2021/116736, mailed May 18, 2022. [cited by applicant]
The written opinion received in the corresponding international application PCT/CN2021/116736, mailed May 18, 2022. [cited by applicant]
The international search report received in the corresponding international application PCT/CN2021/132202, mailed Aug. 3, 2022. [cited by applicant]
The written opinion received in the corresponding international application PCT/CN2021/132202, mailed Aug. 3, 2022. [cited by applicant]
Notice of Allowance, mailed Mar. 2, 2026, for U.S. Appl. No. 18/307,791. [cited by applicant]
Notice of Allowance (with English Machine Translation), mailed Jan. 15, 2026, for corresponding Korean Patent Application Serial No. 10-2024-7007366. [cited by applicant]
Notice of Allowance (with English Machine Translation), mailed Jul. 29, 2025, for Chinese Patent Application Serial No. 202180032903.6. [cited by applicant]
Notice of Allowance (with English Machine Translation), mailed Jun. 30, 2025, for Chinese Patent Application Serial No. 202180039361.5. [cited by applicant]
Li et al., “Control Strategy for Battery Energy Storage System Based on Modular Multilevel Converters”, Automation of Electric Power Systems, vol. 41, No. 9, May 10, 2017, pp. 144-150 (English Abstract Attached). [cited by applicant]
Li et al., “Research on lithium battery pack equalization technology based on energy conversion strategy”, Power Supply Technology, Issue 1, Jan. 20, 2020, pp. 51-53 (English Abstract Attached). [cited by applicant]
Notice of Reasons for Refusal received in the corresponding Japanese application 2023-535941, mailed on May 13, 2024. [cited by applicant]
Notice of Reasons for Refusal received in the corresponding Japanese application 2023-537696, mailed on Jun. 24, 2024. [cited by applicant]
The Notice of Preliminary Rejection received in the counterpart KR Application No. 10-2024-7004327, dated Oct. 27, 2025, 23 pages with English translation. [cited by applicant]
The Reconsideration Report by Examiner before Appeal received in the counterpart JP Application No. 2024-514462, dated Nov. 19, 2025, 10 pages with English translation. [cited by applicant]
Non-Final Office Action, mailed May 4, 2026, for U.S. Appl. No. 18/322,897. [cited by applicant]