Granted Patent B2

US 12,603,592 · App. 18/439,048 · Granted Apr 14, 2026

Inventors: Xiaojian Huang (Ningde, CN); Zhimin Dan (Ningde, CN); Chenghua Fu (Ningde, CN); Wei Chen (Ningde, CN)

Assignee: CONTEMPORARY AMPEREX TECHNOLOGY (HONG KONG) LIMITED

H02P21/22B60L58/27H02P27/08B60L2240/545

Abstract

Claims (39)

1 . A control method of a battery heating system, wherein the battery heating system comprises an inverter and a motor winding, and the inverter is connected to the motor winding and a battery, the method comprising:

acquiring a target voltage vector required for motor operation; and

controlling, according to the target voltage vector, the motor winding to output a pulse current to the battery through the inverter, comprising:

determining, according to the target voltage vector, a first action duration of a pulse vector in a preset period, comprising:

determining, according to preset space vector pulse width modulation information, a target sector of the target voltage vector in the preset space vector pulse width modulation information;

determining a second action duration of an effective voltage vector in the preset period according to an amplitude of the target voltage vector and positional relationship information between the target voltage vector and the target sector; and

determining the first action duration of the pulse vector according to a difference between the preset period and the second action duration; and

controlling, in the first action duration, the motor winding to output the pulse current to the battery through the inverter.

2 . The method according to claim 1 , wherein action time of the pulse vector is between action times of different effective voltage vectors.

3 . The method according to claim 1 , wherein:

the inverter comprises a plurality of switching units, each of the plurality of switching units comprises a switching transistor and a freewheeling diode, the switching transistor and the freewheeling diode are connected in parallel; and

controlling, according to the target voltage vector, the motor winding to output the pulse current to the battery through the inverter further comprises:

controlling, according to the target voltage vector, turning off of the switching transistor in each of the plurality of switching units, to enable the motor winding to output the pulse current to the battery through the freewheeling diode.

4 . The method according to claim 1 , wherein acquiring the target voltage vector required for motor operation comprises:

acquiring a temperature of the battery;

acquiring operation parameters of the battery when the temperature of the battery is less than a temperature threshold; and

acquiring the target voltage vector required for the motor operation when the operating parameters of the battery meet a heating condition of a preset pulse voltage heating mode.

5 . The method according to claim 1 , further comprising:

acquiring a temperature of the battery, the temperature being collected in real time when the battery is in the preset pulse voltage heating mode; and

stopping heating the battery or entering a preset vector control mode when the temperature is greater than or equal to a temperature threshold.

6 . The method according to claim 5 , wherein stopping heating the battery or entering the preset vector control mode when the temperature is greater than or equal to the temperature threshold comprises:

acquiring a temperature of an operating environment of the battery;

entering the preset vector control mode when the temperature of the operating environment is less than an environment temperature threshold; and

stopping heating the battery when the temperature of the operating environment is greater than or equal to the environment temperature threshold.

7 . Electronic equipment, comprising:

a memory storing a program; and

a processor configured to execute the program to implement the control method according to claim 1 .

8 . A control device of a battery heating system, wherein the battery heating system comprises an inverter and a motor winding, and the inverter is connected to the motor winding and a battery, the device comprising:

an acquisition module, configured to acquire a target voltage vector required for motor operation; and

a control module, configured to control the motor winding to output a pulse current to the battery through the inverter according to the target voltage vector, comprising:

determining, according to the target voltage vector, a first action duration of a pulse vector in a preset period, comprising:

determining, according to preset space vector pulse width modulation information, a target sector of the target voltage vector in the preset space vector pulse width modulation information;

determining a second action duration of an effective voltage vector in the preset period according to an amplitude of the target voltage vector and positional relationship information between the target voltage vector and the target sector; and

determining the first action duration of the pulse vector according to a difference between the preset period and the second action duration; and

controlling, in the first action duration, the motor winding to output the pulse current to the battery through the inverter.

9 . A battery heating system, comprising:

an inverter;

a motor winding; and

the control device according to claim 8 .

Assignments (2)

Continuity (2)

References Cited (21)