CN-224204303-U - Single battery

CN224204303UCN 224204303 UCN224204303 UCN 224204303UCN-224204303-U

Abstract

The application provides a single battery, comprising a shell; the cover plate component is connected with the shell and surrounds the shell to form a cavity; the cover plate component is provided with an electrode terminal; an electrode assembly located in the cavity and including a first electrode assembly and a second electrode assembly arranged side by side in a width direction of the cap assembly; a pin, one of both ends of which is connected with the electrode terminal; the other electrode assembly is connected with the first electrode assembly and the second electrode assembly respectively; projection of the connection position of the pin and the first electrode assembly in the direction perpendicular to the length direction of the cover plate assembly is not overlapped with projection of the connection position of the pin and the second electrode assembly in the direction perpendicular to the length direction of the cover plate assembly; the electrode assembly's the same polarity's in this application utmost point ear can dodge each other and possess sufficient extension space, consequently need not to cut before connecting to prevent that utmost point ear edge from forming the burr, improve the product quality and the production efficiency of battery.

Inventors

ZHOU ZHIWEI
WANG ZHEN

Assignees

远景动力技术(湖北)有限公司
远景动力技术(江苏)有限公司
远景睿泰动力技术(上海)有限公司

Dates

Publication Date: 20260505
Application Date: 20250423

Claims (10)

1. A single cell, characterized by comprising: A housing; The cover plate component is connected with the shell and surrounds the shell to form a cavity; An electrode assembly located in the cavity, including a first electrode assembly and a second electrode assembly disposed side by side in a width direction of the cap assembly; And the projection of the connection position of the pin and the first electrode assembly in the direction perpendicular to the length direction of the cover plate assembly is not overlapped with the projection of the connection position of the pin and the second electrode assembly in the direction perpendicular to the length direction of the cover plate assembly.
2. The battery cell as recited in claim 1, wherein the first electrode assembly and the second electrode assembly are respectively connected to one of the leads through tabs of the same polarity, the tabs including a positive tab and a negative tab, The positive electrode tab and the negative electrode tab are respectively arranged on two opposite sides of the electrode assembly along the length direction of the cover plate assembly; The positive electrode tab of the first electrode assembly and the positive electrode tab of the second electrode assembly are arranged on the same side, and the negative electrode tab of the second electrode assembly are arranged on the same side.
3. The battery cell as recited in claim 2, wherein the positive electrode tab of the first electrode assembly is adjacent to the bottom of the housing relative to the positive electrode tab of the second electrode assembly, The negative electrode tab of the first electrode assembly is adjacent to the bottom of the case relative to the negative electrode tab of the second electrode assembly.
4. A single cell according to claim 3, wherein the number of pins is two, and the pins are respectively a positive electrode pin and a negative electrode pin; The positive electrode tab of the first electrode assembly extends towards the second electrode assembly after being bent, and the positive electrode tab of the second electrode assembly extends towards the first electrode assembly after being bent and is respectively connected with the positive electrode pin; The negative electrode tab of the first electrode assembly extends towards the second electrode assembly after being bent, and the negative electrode tab of the second electrode assembly extends towards the first electrode assembly after being bent and is respectively connected with the negative electrode pin.
5. The battery cell as recited in claim 4, wherein the positive electrode lead and the negative electrode lead each have an L-shape in a projection perpendicular to a width direction of the cap assembly, and each include a first connection portion and a second connection portion, The first connecting part extends from a central region of the cap assembly to an edge of the cap assembly between the cap assembly and the electrode assembly; The second connecting part extends from the first connecting part to the bottom of the shell between the shell and the electrode assembly and is connected with the tab with the same polarity.
6. The battery cell as recited in claim 5, wherein the positive electrode tab of the first electrode assembly and the positive electrode tab of the second electrode assembly are welded to the second connection portion of the positive electrode lead, the negative electrode tab of the first electrode assembly and the negative electrode tab of the second electrode assembly are welded to the second connection portion of the negative electrode lead, and a first weld is formed in the positive electrode tab and the negative electrode tab.
7. The battery cell as recited in claim 6, wherein the first solder is elongated and extends along a thickness of the cover assembly.
8. The unit cell according to claim 7, wherein the first weld in the positive electrode tab and the negative electrode tab is one, or, The number of the first welding marks in at least one of the positive electrode lug and the negative electrode lug is at least two, and the at least two first welding marks are arranged in parallel along the width direction of the cover plate assembly.
9. The cell according to claim 5, wherein the second connecting portion is provided with a linear slot, and the opening of the linear slot faces away from the cover plate assembly and divides the second connecting portion into two sub-connecting portions.
10. The unit cell according to claim 9, wherein a positive electrode tab of the first electrode assembly and a positive electrode tab of the second electrode assembly are welded to at least one of the two sub-connection parts of the positive electrode lead, a negative electrode tab of the first electrode assembly and a negative electrode tab of the second electrode assembly are welded to at least one of the two sub-connection parts of the negative electrode lead, and a second weld is formed in the positive electrode tab and the negative electrode tab.

Description

Single battery Technical Field The application relates to the technical field of batteries, in particular to a single battery. Background Square-case batteries are a common type of single battery. Because the thickness of the battery is thinner and the width of the applied pins is narrower, the electrode lugs of the electrode assembly need to be cut appropriately before being connected with the pins so as to prevent the electrode lugs with the same polarity from interfering with each other. However, burrs are easily formed at the edges of the tabs during the cutting process, so that the single battery is abnormal in high-voltage test or self-discharge, and the production efficiency and the product yield of the single battery are affected. Disclosure of utility model In view of the above, the present application is directed to a single battery for solving some or all of the above-mentioned problems. Based on the above object, the present application provides a single battery including: A housing; The cover plate component is connected with the shell and surrounds the shell to form a cavity; An electrode assembly located in the cavity, including a first electrode assembly and a second electrode assembly disposed side by side in a width direction of the cap assembly; The electrode assembly comprises a cover plate assembly, a pin, a first electrode assembly, a second electrode assembly, a first electrode terminal, a second electrode assembly, a first electrode assembly and a second electrode assembly, wherein one of two ends of the pin is connected with the electrode terminal, the other end of the pin is connected with the first electrode assembly and the second electrode assembly respectively, and projection of a connection position of the pin and the first electrode assembly in the direction perpendicular to the length direction of the cover plate assembly is not overlapped with projection of a connection position of the pin and the second electrode assembly in the direction perpendicular to the length direction of the cover plate assembly. The connection position of the pin and the first electrode assembly of the single battery is projected in the direction perpendicular to the length direction of the cover plate assembly, and the projection of the connection position of the pin and the second electrode assembly in the direction perpendicular to the length direction of the cover plate assembly is not overlapped, so that the tabs with the same polarity of the first electrode assembly and the second electrode assembly respectively have sufficient extension space and realize mutual avoidance, different tabs are prevented from interfering with each other, when the tabs have sufficient extension space, a cutting procedure can be omitted, the connection cost is reduced, the problem of edge burrs of the tabs caused by cutting is solved, the high-voltage test abnormality or self-discharge phenomenon of the single battery is prevented, and the quality and the production efficiency of the battery are improved. Drawings In order to more clearly illustrate the embodiments of the application or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art. Fig. 1 is a schematic diagram showing connection between an electrode assembly and a lead described in the related art; FIG. 2 is a schematic diagram of a cell according to an embodiment of the present application; FIG. 3 is a schematic diagram illustrating the connection between an electrode assembly and two pins according to an embodiment of the present application; FIG. 4 is a schematic diagram illustrating connection between a first lead and an electrode assembly according to an embodiment of the present application; FIG. 5 is an exploded view of a first lead and electrode assembly according to an embodiment of the present application; fig. 6 is a schematic connection diagram of a tab and a second connection portion in an example embodiment of the present application; fig. 7 is a schematic connection diagram of a second tab and a second connection portion according to an embodiment of the present application; fig. 8 is a schematic connection diagram of a third tab and a second connection portion according to an embodiment of the present application; fig. 9 is a schematic connection diagram of a tab and a second connection portion in an example four described in an embodiment of the present application; FIG. 10 is a schematic diagram illustrating connection between a second lead and an electrode assembly according to an embodiment of the present application; FIG. 11 is an exploded view of a second lead and electrode assembly according to an emb