LITHIUM-ION POWER BATTERY

• US 20200136215A1
• Filed: 12/27/2019
• Published: 04/30/2020
• Est. Priority Date: 06/28/2017
• Status: Active Application

• Current Assignee: Changsha Junengchong New Energy Co., Ltd.
• Original Assignee: Changsha Junengchong New Energy Co., Ltd.
• Inventors: QIU, BO-QIAN
• Application Number:
  US16/728,958
• Publication Number:
  US 20200136215A1
• Time in Patent Office: Days
• CPC Class Codes: H01M 10/0525 Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
• CPC Class Codes: H01M 10/613 Cooling or keeping cold
• CPC Class Codes: H01M 10/653 characterised by electrically insulating or thermally conductive materials
• CPC Class Codes: H01M 10/6551 Surfaces specially adapted for heat dissipation or radiation, e.g. fins or coatings
• CPC Class Codes: H01M 10/6552 Closed pipes transferring heat by thermal conductivity or phase transition, e.g. heat pipes
• CPC Class Codes: H01M 10/6556 Solid parts with flow channel passages or pipes for heat exchange closed pipes H01M10/6552
• CPC Class Codes: H01M 10/6567 Liquids
• CPC Class Codes: Y02E 60/10 Energy storage using batteries

Abstract

A lithium-ion power battery includes at least one battery cell each having a positive electrode plate and a negative electrode plate. Each battery cell includes at least two heat conducting and collecting bodies formed on at least one of the positive electrode plate and the negative electrode plate. Each heat conducting and collecting body is a portion of the positive current collector not coated by the positive active material layer or a portion of the negative current collector not coated by the negative active material layer. The heat conducting and collecting bodies are stacked together to form at least one heat converging path. A fluid-containing pipe is connected to the at least one heat converging path. A connector is disposed at each of an inlet and an outlet of the fluid-containing pipe, for connecting the fluid-containing pipe to an external component.

Claims

1. A lithium-ion power battery comprising:

at least one battery cell each comprising a positive electrode plate and a negative electrode plate, the negative electrode plate comprising a negative current collector and a negative active material layer coated on the negative current collector, the positive electrode plate comprising a positive current collector and a positive active material layer coated on the positive current collector,

wherein each of the at least one battery cell comprises at least two heat conducting and collecting bodies formed on at least one of the positive electrode plate and the negative electrode plate, each of the heat conducting and collecting bodies being a portion of the positive current collector which is not coated by the positive active material layer or a portion of the negative current collector which is not coated by the negative active material layer;

wherein the at least two heat conducting and collecting bodies are stacked together to form at least one heat converging path, which being configured to transmit heat energy into or out of the battery cell;

wherein a fluid-containing pipe is connected to the at least one heat converging path; and

wherein a connector is disposed at each of an inlet and an outlet of the fluid-containing pipe, the connector connecting the fluid-containing pipe to an external component.

2. The lithium-ion soft battery of claim 1, further comprising a metallic casing configured for receiving the at least one battery cell and a top cover connected to the metallic casing, wherein a fluid-containing branched pipe is disposed on the heat converging path of each of the at least one battery cell, a fluid-containing main pipe is disposed on the metallic casing or the top cover, each fluid-containing branched pipe is jointed to the fluid-containing main pipe to form the fluid-containing pipe.

3. The lithium-ion soft battery of claim 2, wherein the connector protrudes from the metallic casing and the top cover.

4. The lithium-ion soft battery of claim 1, wherein the at least two heat conducting and collecting bodies are connected by welding, bolting, or riveting.

5. The lithium-ion soft battery of claim 1, wherein the at least two heat conducting and collecting bodies are bent towards each other.

6. The lithium-ion soft battery of claim 5, wherein the at least two heat conducting and collecting bodies are bent to be inclined with the positive electrode plate or the negative electrode plate by an angle between 0 degree to 90 degrees.

7. The lithium-ion soft battery of claim 5, wherein the at least two heat conducting and collecting bodies are bent toward different directions or a single direction.

8. The lithium-ion soft battery of claim 1, wherein a portion of each of the at least two heat conducting and collecting bodies is bent toward a single direction or different directions, and the portion which is bent is connected to a remaining portion of the at least two heat conducting and collecting bodies, the remaining portion of each of the heat conducting and collecting bodies is straight.

9. The lithium-ion soft battery of claim 1, wherein at least a portion of each of the at least two heat conducting and collecting bodies defines a plurality of holes or a concave and convex surface.

10. The lithium-ion soft battery of claim 1, wherein each of the at least two heat conducting and collecting bodies comprises a first insulating layer on a surface thereof.

11. The lithium-ion soft battery of claim 1, wherein the fluid-containing pipe comprises a second insulating layer disposed on an inner wall of the fluid-containing pipe.

12. The lithium-ion soft battery of claim 2, wherein the fluid-containing pipe comprises a second insulating layer disposed on a joint between the fluid-containing branched pipe and the fluid-containing main pipe.

13. The lithium-ion soft battery of claim 1, wherein each of the at least two heat conducting and collecting bodies protrudes from the positive electrode plate, and portions of the at least two heat conducting and collecting bodies which protrude from the positive electrode plate are inserted into an electrolyte of the lithium-ion soft battery.

14. The lithium-ion soft battery of claim 12, further comprising a heat exchanging device disposed in the electrolyte, wherein the heat exchanging device heats or cools the electrolyte.

15. The lithium-ion soft battery of claim 1, further comprising a heat exchanging device disposed on the heat converging path.

16. The lithium-ion soft battery of claim 1, wherein the at least two heat conducting and collecting bodies are recessed with respect to the negative electrode plate, an interconnecting portion is formed between the at least two heat conducting and collecting bodies and the negative electrode plate, a thickness of an entirety of each of the at least two heat conducting and collecting bodies is same as of a thickness of the interconnecting portion.

17. The lithium-ion soft battery of claim 1, wherein a temperature sensor is disposed on the at least one heat converging path.

18. The lithium-ion soft battery of claim 1, wherein the fluid-containing pipe is a pipe containing air conditioning refrigerant or a heat pipe.

19. The lithium-ion soft battery of claim 1, further comprising a plurality of fins disposed in the fluid-containing pipe.