Battery system including alternating current, fast-chargeable capacitor assisted batteries

Patent metadata

Field	Value
Publication number	US-12444778-B2
Application number	US-202117563295-A
Country	US
Kind code	B2
Filing date	Dec 28, 2021
Priority date	Sep 18, 2021
Publication date	Oct 14, 2025
Grant date	Oct 14, 2025

Abstract

A capacitor assisted battery module includes a first diode including an anode and a cathode. A second diode includes an anode and a cathode. The anode of the first diode is connected to the cathode of the second diode at a first node. A first capacitor assisted battery (CAB) block includes a positive terminal, a negative terminal and N CABs, where N is an integer greater than zero. The positive terminal of the first CAB block is connected to the cathode of the first diode. A second capacitor assisted battery (CAB) block includes a positive terminal, a negative terminal and N CABs, wherein the negative terminal of the second CAB block is connected to the anode of the second diode. The negative terminal of the first CAB block and the positive terminal of the second CAB block are connected to a second node.

First claim

What is claimed is:

1. A capacitor assisted battery module comprising:
a first diode including an anode and a cathode;
a second diode including an anode and a cathode,
wherein the anode of the first diode is directly connected to the cathode of the second diode at a first node;
a first capacitor assisted battery (CAB) block including a positive terminal, a negative terminal and N CABs, where N is an integer greater than zero, wherein the positive terminal of the first CAB block is directly connected to the cathode of the first diode; and
a second capacitor assisted battery (CAB) block including a positive terminal, a negative terminal and N CABs, wherein the negative terminal of the second CAB block is directly connected to the anode of the second diode, and
wherein the negative terminal of the first CAB block and the positive terminal of the second CAB block are directly connected to a second node.

2. The capacitor assisted battery module of claim 1 , wherein:
the first node is configured for connection to a first terminal of an AC source, and
the second node is configured for connection to a second terminal of the AC source.

3. The capacitor assisted battery module of claim 1 , wherein each of the N CABs of the first CAB block includes a capacitor and a battery connected in parallel with the capacitor.

4. The capacitor assisted battery module of claim 1 , wherein N is greater than one.

5. The capacitor assisted battery module of claim 1 , wherein N is greater than one and wherein the N CABs of the first CAB block are connected in series.

6. The capacitor assisted battery module of claim 1 , wherein N is greater than one and wherein the N CABs of the first CAB block are connected in parallel.

7. The capacitor assisted battery module of claim 1 , further comprising:
D first diodes connected in parallel with the first diode, where D is an integer greater than zero; and
D second diodes connected in parallel with the second diode.

8. A battery system comprising:
M capacitor assisted battery modules including the capacitor assisted battery module of claim 1 , where M is an integer greater than one,
wherein the capacitor assisted battery module of claim 1 is a first one of the M capacitor assisted battery modules,
wherein the first node of the first one of the M capacitor assisted battery modules is configured for connection to a first terminal of an AC source,
wherein a first node of second to M th ones of the M capacitor assisted battery modules are connected to a second node of the first one to the (M- 1 ) th ones of the M capacitor assisted battery modules, respectively, and
wherein the second node of the M th one of the M capacitor assisted battery modules is configured for connection to a second terminal of the AC source.

9. The battery system of claim 8 , wherein the capacitor comprises a lithium ion capacitor.

10. The battery system of claim 8 , wherein the battery comprises a lithium ion battery.

11. A capacitor assisted battery module comprising:
an AC switch comprising:
a first node;
D first diodes, wherein anodes of the D first diodes are directly connected to the first node and where D is an integer greater than zero; and
D second diodes, wherein cathodes of the D second diodes are directly connected to the first node;

a first capacitor assisted battery (CAB) block including a positive terminal, a negative terminal and N CABs, where N is an integer greater than zero, wherein the positive terminal of the first CAB block is directly connected to the cathodes of the D first diodes; and
a second capacitor assisted battery (CAB) block including a positive terminal, a negative terminal and N CABs, wherein the negative terminal of the second CAB block is directly connected to the anodes of the D second diodes, and
wherein the negative terminal of the first CAB block and the positive terminal of the second CAB block are directly connected to a second node.

12. The capacitor assisted battery module of claim 11 , wherein:
the first node is configured for connection to a first terminal of an AC source, and
the second node is configured for connection to a second terminal of the AC source.

13. The capacitor assisted battery module of claim 11 , wherein each of the N CABs of the first CAB block includes a capacitor and a battery connected in parallel with the capacitor.

14. The capacitor assisted battery module of claim 11 , wherein N is greater than one.

15. The capacitor assisted battery module of claim 11 , wherein N is greater than one and wherein the N CABs of the first CAB block are connected in series.

16. The capacitor assisted battery module of claim 11 , wherein N is greater than one and wherein the N CABs of the first CAB block are connected in parallel.

17. The capacitor assisted battery module of claim 11 , wherein:
the D first diodes are connected in parallel; and
the D second diodes are connected in parallel.

18. A battery system comprising:
M capacitor assisted battery modules including the capacitor assisted battery module of claim 11 , where M is an integer greater than one,
wherein the capacitor assisted battery module of claim 11 is a first one of the M capacitor assisted battery modules,
wherein the first node of the first one of the M capacitor assisted battery modules is configured for connection to a first terminal of an AC source,
wherein a first node of second to M th ones of the M capacitor assisted battery modules are connected to a second node of the first one to the (M- 1 ) th ones of the M capacitor assisted battery modules, respectively, and
wherein the second node of the M th one of the M capacitor assisted battery modules is configured for connection to a second terminal of the AC source.

19. The battery system of claim 18 , wherein the capacitor comprises a lithium ion capacitor.

20. The battery system of claim 18 , wherein the battery comprises a lithium ion battery.

Assignees

• Gm Global Tech Operations Llc

Inventors

• Su Qili
• Kong Dewen
• Chen Si
• Liu Haijing
• Rich Dave G
• Winger Lyall K

Classifications

• H02J7/50

  acting upon multiple batteries simultaneously or sequentially · CPC title

• H02J2105/37

  exchanging power with electric vehicles [EV] or with hybrid electric vehicles [HEV] · CPC title

• H01M10/44

  Methods for charging or discharging (circuits for charging H02J7/00) · CPC title

• H01M2220/20

  Batteries in motive systems, e.g. vehicle, ship, plane · CPC title

• H01M10/4264 Primary

  with capacitors · CPC title