Quick charging multi-voltage battery management system
Disclosed herein are battery management systems (BMS) for controlling the operating state of a battery pack device, as well as methods for changing the operating state of a battery pack device. The battery pack may have multiple cells therein, each cell capable of generating multiple different voltages to allow more energy (voltage×current) to be quickly and efficiently put into the battery, thus optimizing battery charging (i.e., reducing battery charging times). These battery packs may change from operating in series, to operating in parallel, when desired, while utilizing affordable relays and more affordable electrical components. These battery packs may be comprised of any number of cells and can controlled and/or operated by the BMS, for optimal battery charging, or for optimal discharging, as desired. The BMS may be any type of control logic and/or software, operable to control and/or operate the battery packs.
1 . A battery management system (BMS) for controlling the operating state of a battery pack device, the battery pack device comprising:
at least three electrically coupled cell packs, each of the cell packs having a positive and a negative terminal thereon, and relays/contactors connected thereto, wherein the relays/contactors are reconfigurable to connect each of the cell packs in either parallel or in series; and
wherein the battery management system controls opening and closing of the relays/contactors in each of the cell packs, and between each of the cell packs, to change an operating state of each of the cell packs from parallel to series;
wherein one cell pack of the at least three cell packs is designated as a primary cell pack, and at least one cell pack is designated as secondary and is responsible for communicating its health and status to the primary cell pack; and
wherein the primary cell pack determines overall health of the battery pack device.
2 . The system of claim 1 , wherein the at least three cell packs are configured by the BMS to operate in parallel, providing lower voltage and higher capacity.
3 . The system of claim 1 , wherein the at least three cell packs are configured by the BMS to operate in series, providing higher voltage and lower capacity.
4 . The system of claim 3 , wherein the higher voltage and lower capacity results in faster battery charging.
5 . The system of claim 3 , wherein the battery pack device is a 48 V., 600 Amp-hour battery pack device, when operated in parallel configuration.
6 . The system of claim 5 , wherein the battery pack device is fully charged within 60 minutes, when operated in series configuration.
7 . The system of claim 1 , further comprising multiple additional battery management systems (BMSs), wherein the multiple BMS's control multiple additional battery pack devices and wherein the multiple BMS's communicate digitally to maintain equal voltages among the multiple additional battery pack devices.
8 . The system of claim 1 , wherein the battery pack device further comprises a micro-processor-based controller or microcontroller (MCU) that executes a computer program and communicates with the BMS.
9 . The system of claim 1 , wherein the battery pack device further comprises a switch, button, or other means for automatically notifying the BMS when placed into a battery charger, so that the BMS is prompted to reconfigure the relays/contactors during battery charging.
10 . The system of claim 1 , wherein the BMS is housed within a battery charger configured to receive the battery pack device.
11 . The system of claim 1 , wherein communication between the BMS and the battery pack device is bi-directional.
12 . The system of claim 1 , wherein communication between the BMS and the battery pack device is uni-directional.
13 . The system of claim 1 , further comprising multiple battery pack devices, wherein the BMS controls the operating state of each of the multiple battery pack devices.
14 . A method of changing an operating state of a battery pack device, comprising:
placing the battery pack device into a battery charger, wherein the battery pack device comprises at least three electrically coupled cell packs, each of the cell packs having a positive and a negative terminal thereon, and relays/contactors connected thereto, wherein the relays/contactors are reconfigurable to connect each of the cell packs in either parallel or in series; and
initiating communication between the battery pack device and a battery management system (BMS) to reconfigure relays/contactors between each of the cell packs within the battery pack device to change the operating state of the battery pack device, wherein one cell pack of the at least three cell packs is designated as a primary cell pack; designating at least one cell pack as secondary, the secondary cell pack being responsible for communicating its health and status to the primary cell pack; and wherein the primary cell pack determines overall health of the battery pack device.
15 . The method of claim 14 , wherein initiating communication happens automatically when the battery pack device is coupled to the battery charger.
16 . The method of claim 14 , wherein changing the operating state of the battery pack device comprises the step of reconfiguring the cell packs in either parallel or in series.