CN216850247U

CN216850247U - Battery and battery pack

Info

Publication number: CN216850247U
Application number: CN202220577559.0U
Authority: CN
Inventors: 关俊山; 颜廷露; 张勇杰
Original assignee: China Lithium Battery Technology Co Ltd
Current assignee: China Lithium Battery Technology Co Ltd
Priority date: 2022-03-16
Filing date: 2022-03-16
Publication date: 2022-06-28
Anticipated expiration: 2032-03-16

Abstract

The utility model relates to a battery technology field provides a battery and group battery. The battery includes: a battery case; the pole component is arranged on the battery shell, and at least part of the pole component is positioned outside the battery shell; the protection piece is arranged in the battery shell, and at least part of the pole post assembly is positioned in the protection piece so as to prevent adjacent batteries from extruding the pole post assembly; wherein the guard exposes a connection surface of the pole assembly for connection with the busbar. Through making at least part of utmost point post subassembly be located the protection piece to can avoid adjacent battery to extrude utmost point post subassembly, with this avoid causing safety problem, thereby improve the performance of battery.

Description

Battery and battery pack

Technical Field

The utility model relates to a battery technology field especially relates to a battery and group battery.

Background

In the related art, after the battery pack is used for a long time, the battery may expand, so that the position of the pole assembly of the battery may change, and the problem that the pole assembly is in contact with the adjacent battery may occur, thereby causing a safety problem.

SUMMERY OF THE UTILITY MODEL

The utility model provides a battery and group battery to improve the performance of battery.

According to a first aspect of the present invention, there is provided a battery, comprising:

a battery case;

the pole component is arranged on the battery shell, and at least part of the pole component is positioned outside the battery shell;

the protection piece is arranged in the battery shell, and at least part of the pole post assembly is positioned in the protection piece so as to prevent adjacent batteries from extruding the pole post assembly;

wherein the guard exposes a connection surface of the pole assembly for connection with the busbar.

The utility model discloses battery includes battery housing, utmost point post subassembly and protection piece, and utmost point post subassembly and protection piece all set up on battery housing. Through making at least part of utmost point post subassembly be located the protection piece to can avoid adjacent battery to extrude utmost point post subassembly, with this avoid causing safety problem, thereby improve the performance of battery.

According to a second aspect of the present invention, there is provided a battery pack comprising the above battery.

The utility model discloses group battery includes the battery, and the battery includes battery housing, utmost point post subassembly and protection piece, and utmost point post subassembly and protection piece all set up on battery housing. By making at least part of the pole assembly located in the guard, it is possible to avoid the adjacent battery from pressing against the pole assembly, thereby avoiding causing safety problems, and thus improving the usability of the battery pack.

Drawings

For a better understanding of the present disclosure, reference may be made to the embodiments illustrated in the following drawings. The components in the drawings are not necessarily to scale, and related elements may be omitted in order to emphasize and clearly illustrate the technical features of the present disclosure. In addition, the relevant elements or components may be arranged differently as is known in the art. Further, in the drawings, like reference characters designate the same or similar parts throughout the several views. Wherein:

fig. 1 is a partial structural schematic view of a battery pack according to an exemplary embodiment;

FIG. 2 is a schematic diagram illustrating a partial structure of a battery according to an exemplary embodiment;

FIG. 3 is another partial schematic structural view of a battery according to an exemplary embodiment;

fig. 4 is a schematic structural view illustrating a bus bar and a shielding member of a battery pack according to an exemplary embodiment.

The reference numerals are explained below:

1. a bus bar; 2. recessing; 10. a battery case; 11. a first surface; 12. a second surface; 20. a pole assembly; 21. a connecting surface; 22. a terminal; 221. a support portion; 222. a connecting portion; 23. a pole column; 30. a guard; 31. a limiting space; 32. and a through hole.

Detailed Description

The technical solutions in the exemplary embodiments of the present disclosure will be clearly and completely described below with reference to the drawings in the exemplary embodiments of the present disclosure. The example embodiments described herein are for illustrative purposes only and are not intended to limit the scope of the present disclosure, and it is, therefore, to be understood that various modifications and changes may be made to the example embodiments without departing from the scope of the present disclosure.

In the description of the present disclosure, unless otherwise explicitly specified or limited, the terms "first", "second", and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance; the term "plurality" means two or more; the term "and/or" includes any and all combinations of one or more of the associated listed items. In particular, reference to "the" object or "an" object is also intended to mean one of many such objects possible.

The terms "connected," "secured," and the like are to be construed broadly and unless otherwise stated or indicated, and for example, "connected" may be a fixed connection, a removable connection, an integral connection, an electrical connection, or a signal connection; "connected" may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in the present disclosure can be understood by those skilled in the art as the case may be.

Further, in the description of the present disclosure, it is to be understood that the directional words "upper", "lower", "inner", "outer", etc., which are described in the exemplary embodiments of the present disclosure, are described at the angles shown in the drawings, and should not be construed as limiting the exemplary embodiments of the present disclosure. It will also be understood that, in the context of a connection between one element or feature and another element(s), "on," "under," or "inside" or "outside," it can be directly connected to the other element(s) "on," "under" or "inside" or "outside," or indirectly connected to the other element(s) "on," "under" or "inside" or "outside" through intervening elements.

An embodiment of the present invention provides a battery, please refer to fig. 1 to fig. 4, the battery includes: a battery case 10; the pole assembly 20, the pole assembly 20 is arranged in the battery shell 10, and at least part of the pole assembly 20 is positioned outside the battery shell 10; a guard 30, the guard 30 being disposed in the battery housing 10, at least a portion of the pole assembly 20 being located within the guard 30 to prevent adjacent batteries from compressing the pole assembly 20; wherein the guard 30 exposes the connection surface 21 of the pole assembly 20 for connection with the busbar 1.

The battery of one embodiment of the present invention includes a battery case 10, a pole assembly 20, and a protection member 30, wherein the pole assembly 20 and the protection member 30 are disposed on the battery case 10. By locating at least a portion of the pole assembly 20 within the guard 30, adjacent batteries can be prevented from compressing the pole assembly 20, thereby avoiding safety issues and improving the performance characteristics of the battery.

It should be noted that at least a portion of the pole assembly 20 is located outside the battery housing 10, and the guard 30 exposes the connection surface 21 of the pole assembly 20 for connection with the bus bar 1, so that connection of the bus bar 1 with the connection surface 21 can be facilitated, thereby ensuring connection of the bus bar 1 in a subsequent battery pack forming process.

In the present embodiment, the protection member 30 forms protection for the pole assembly 20 by providing the protection member 30 on the battery housing 10 and the pole assembly 20 in the protection member 30, so that even if the battery expands, the adjacent battery can be prevented from pressing against the pole assembly 20 due to the protection member 30, that is, the adjacent battery can only press against the protection member 30, thereby ensuring the safety of the battery pack. Moreover, when the battery deforms and expands, the protection member 30 can be used to limit the displacement of the battery, and ensure that a sufficient safe electrical gap and creepage distance are reserved between the pole assembly 20 and the adjacent battery in the whole life cycle of the battery.

The battery includes a cell and an electrolyte, and a minimum unit capable of performing an electrochemical reaction such as charge/discharge. The battery cell refers to a unit formed by winding or laminating a stack including a first electrode, a separator, and a second electrode. When the first electrode is a positive electrode, the second electrode is a negative electrode. Wherein the polarities of the first electrode and the second electrode can be interchanged. The battery core is disposed in the battery casing 10, the pole assembly 20 is electrically connected to the battery core, and a part of the pole assembly 20 may be disposed in the battery casing 10, so as to facilitate the electrical connection of the pole assembly 20 to the battery core, and certainly, in some embodiments, the whole pole assembly 20 is not disposed outside the battery casing 10. The pole assembly 20 and the battery core may be connected through an adaptor sheet, or the pole assembly 20 and the battery core may be directly connected.

Specifically, the cell may be a laminated cell, and the cell has a first electrode, a second electrode opposite to the first electrode, and a diaphragm disposed between the first electrode and the second electrode, which are stacked on top of each other, so that a plurality of pairs of the first electrode and the second electrode are stacked to form the laminated cell.

The battery may also be a wound battery, that is, a first electrode, a second electrode opposite to the first electrode in electrical property, and a diaphragm sheet disposed between the first electrode and the second electrode are wound to obtain a wound battery core.

The battery case 10 may include a first case member and a second case member connected to the first case member to form a receiving space in which the battery cell is disposed, thereby ensuring reliable sealing of the battery cell. The first shell piece and the second shell piece can both form a space, and after the first shell piece and the second shell piece are in butt joint, the battery cell is located in an accommodating space formed by the two spaces. The first housing member and the second housing member may have the same or different spatial depths, and are not limited herein. The first housing member may be a flat plate, and the second housing member forms a space.

In one embodiment, the connecting surface 21 may be disposed to protrude beyond the guard 30 to facilitate subsequent connection with the busbar 1.

In one embodiment, the connecting surface 21 is not provided protruding the guard 30, so that the guard 30 can achieve effective protection of the pole assembly 20, the bus bar 1 can be inserted into or connected with the connecting surface 21 by pressing the guard 30, and this process can enhance the contact capability of the bus bar 1 with the connecting surface 21.

The protector 30 may have a certain elasticity so that the bus bar 1 may press the protector 30 to be connected to the connection surface 21.

In some embodiments, the bus bar 1 and the connecting surface 21 may be connected by welding.

In one embodiment, the guard 30 is disposed around the outer edge of the pole assembly 20 such that reliable protection of the pole assembly 20 by the guard 30 may be achieved.

It should be noted that the protection member 30 is disposed around the outer edge of the pole assembly 20, and along the outer edge of the pole assembly 20, the protection member 30 forms a full covering of the pole assembly 20, that is, the protection member 30 forms a circumferentially closed structure to form a circumferentially closed protection for the pole assembly 20, so as to achieve a reliable protection for the pole assembly 20.

In one embodiment, the guard 30 includes insulation so that reliable insulation between the pole assembly 20 and an adjacent cell may be ensured, and also a reliable insulation shield may be formed for the pole assembly 20.

The insulating portion of the guard 30 may be a coating, such as alumina (Al)₂O₃) Zirconium oxide (ZrO)₂) And the like.

The shielding member 30 may be made of an insulating material, such as plastic, rubber, etc., so as to achieve reliable insulation.

In one embodiment, the protection member 30 has a hollow structure, which not only ensures that the pole assembly 20 is located inside the protection member 30, but also reduces the weight of the protection member 30 without affecting the protection performance of the protection member 30.

In one embodiment, as shown in fig. 2 and 3, the pole assembly 20 includes: a terminal 22, at least a portion of the terminal 22 being located outside the battery housing 10, the terminal 22 being located within the guard 30, the terminal 22 including a connection surface 21; the pole 23, the pole 23 is connected to the terminal 22, and at least part of the pole 23 is located inside the battery shell 10, so that the electrical connection between the pole 23 and the battery cell can be facilitated. The protector 30 achieves effective protection of the terminal 22 and can ensure that the terminal 22 can be brought into connection with the bus bar 1, i.e., the protector 30 can expose the connection surface 21 of the terminal 22.

The number of the pole 23 may be at least two, and as shown in fig. 3, the number of the pole 23 may be two, two poles 23 are disposed on the terminal 22 at intervals, and a part of the pole 23 may be located inside the battery case 10, so that the pole 23 is connected to a pole tab of the battery cell.

In one embodiment, as shown in fig. 3, the terminal 22 includes: the supporting part 221 is arranged on the battery shell 10, the pole 23 is connected to the supporting part 221, the protecting piece 30 covers the circumferential outer edge of the supporting part 221, and part of the protecting piece 30 is positioned on one side of the supporting part 221, which is far away from the battery shell 10; a connecting portion 222, the connecting portion 222 being connected to the supporting portion 221, the connecting portion 222 including a connecting surface 21, the protector 30 covering a circumferential outer edge of the connecting portion 222; the included angle is formed between the supporting portion 221 and the connecting portion 222, the supporting portion 221 can be reliably fixed on the battery case 10, and the included angle is formed between the supporting portion 221 and the connecting portion 222, so that the bus bar 1 can be reliably connected with the connecting portion 222.

It should be noted that an included angle is formed between the supporting portion 221 and the connecting portion 222, that is, an included angle between the supporting portion 221 and the connecting portion 222 is greater than 0 and smaller than 180 degrees.

In one embodiment, the supporting portion 221 is substantially perpendicular to the connecting portion 222, which not only facilitates reliable connection between the busbar 1 and the connecting portion 222, but also makes the structure of the terminal 22 more compact, which is beneficial to improving the structural performance of the terminal 22.

It should be noted that the supporting portion 221 is substantially perpendicular to the connecting portion 222, and here, the manufacturing error is not considered when the supporting portion 221 is protruded, and the connecting portion 222 is perpendicular to the supporting portion 221 when the mounting error is determined.

In one embodiment, as shown in fig. 2 and 4, a portion of the pole 23 is located outside the battery case 10; wherein the protection member 30 is provided with a through hole 32, the through hole 32 is disposed opposite to the pole 23, so that the connection of the pole 23 and the terminal 22 can be facilitated.

The post 23 and the terminal 22 may be riveted, so that the through hole 32 is disposed opposite to the post 23, that is, after the protective part 30 is mounted, the post 23 and the terminal 22 are riveted, and at this time, the through hole 32 may be disposed to facilitate the riveting of the post 23 and the terminal 22.

In one embodiment, the protection component 30 is an integrally formed structure, which not only can improve the structural strength of the protection component 30, but also can improve the manufacturing efficiency of the protection component 30. The guard 30 may be of unitary injection molded construction.

In one embodiment, as shown in fig. 2 and 3, the battery housing 10 includes two opposite first surfaces 11 and four second surfaces 12 surrounding the first surfaces 11, the area of the first surfaces 11 is larger than that of the second surfaces 12, and the pole assembly 20 and the protection member 30 are disposed on the first surfaces 11, so that a reliable supporting surface for the pole assembly 20 and the protection member 30 can be ensured, thereby ensuring the stability of the pole assembly 20 and the protection member 30.

It should be noted that the two opposite first surfaces 11 are large surfaces of the battery case 10, the four second surfaces 12 are small surfaces of the battery case 10, the four second surfaces 12 include two pairs of small surfaces, that is, a first pair of small surfaces extending along the length direction of the battery case 10, and a second pair of small surfaces extending along the width direction of the battery case 10, and the areas of the first pair of small surfaces are larger than the areas of the second pair of small surfaces, but smaller than the areas of the large surfaces.

In some embodiments, there are two pole assemblies 20, each of the two pole assemblies 20 is a positive pole assembly and a negative pole assembly, and there are two tabs of the battery cell, each of the two tabs is a positive pole tab and a negative pole tab, the positive pole assembly is connected to the positive pole tab, and the negative pole assembly is connected to the negative pole tab.

As shown in fig. 1 to 3, the battery case 10 may be provided with two recesses 2, and the two recesses 2 and the two pole assemblies 20 may be respectively located on two opposite surfaces of the battery case 10. At this time, when the batteries are grouped, the pole assembly 20 of another battery can be received in the recess 2, thereby increasing the energy density of the battery pack.

In some embodiments, it is not excluded that the pole assembly 20 of the battery may be disposed within the recess 2 of the battery.

The terminal post assembly 20 may be disposed at an end of the battery case 10, so that the connection is facilitated and the length and space of the battery can be fully utilized. The two pole assemblies 20 may be disposed on the same surface of the battery case 10, or the two pole assemblies 20 may be disposed on both surfaces of the battery case 10.

The battery case 10 may have a substantially rectangular structure, that is, the battery case 10 may have a rectangular structure in consideration of manufacturing tolerances.

An embodiment of the present invention further provides a battery, please refer to fig. 1 to 4, the battery includes a battery housing 10, a pole assembly 20 and a protection member 30, the battery housing 10 includes two opposite first surfaces 11 and four second surfaces 12 disposed around the first surfaces 11, an area of the first surfaces 11 is larger than an area of the second surfaces 12, the pole assembly 20 and the protection member 30 are disposed on the first surfaces 11; wherein at least a portion of the pole assembly 20 is located outside the battery housing 10 and at least a portion of the pole assembly 20 is located within the guard 30.

It should be noted that, for the specific structure of the battery in this embodiment, reference may be made to the related structure of the battery, and details are not described herein.

An embodiment of the utility model also provides a group battery, including foretell battery.

The battery pack according to an embodiment of the present invention includes a battery including a battery case 10, a pole assembly 20, and a protection member 30, and the pole assembly 20 and the protection member 30 are all disposed on the battery case 10. By locating at least a portion of the pole assembly 20 within the guard 30, adjacent cells can be prevented from crushing the pole assembly 20, thereby avoiding safety issues and improving the performance of the battery pack.

In one embodiment, the number of the cells is plural, the plurality of cells are sequentially arranged, and the first surfaces 11 of the adjacent cells may be oppositely arranged such that the stacking direction of the cells is perpendicular to the first surfaces 11, thereby facilitating the stacking of the cells and improving the space utilization of the battery pack.

In one embodiment, a recess 2 is formed on one of two adjacent batteries, and the recess 2 is used for receiving a protection member 30 of the other battery, so that the space utilization rate of the battery pack is improved.

The guard 30 may have an outer shape that matches the wall surface of the recess 2, that is, the guard 30 may have an outer shape that follows the wall surface of the recess 2. The shielding member 30 may have a certain distance from the wall surface of the recess 2, and it is not excluded that the shielding member 30 contacts the wall surface of the recess 2, and the invention is not limited thereto.

In one embodiment, as shown in fig. 1-4, the battery pack further includes a bus bar 1, the guard 30 includes a restraining space 31, and the connection surface 21 of the pole assembly 20 is located within the restraining space 31; the part of the bus bar 1 is limited in the limiting space 31 to be connected with the connecting surface 21, the limiting space 31 can position the bus bar 1 to facilitate installation of the bus bar 1, and after installation is completed, the limiting space 31 can limit the bus bar 1, so that installation stability of the bus bar 1 is improved.

In one embodiment, the battery pack may include at least two cells, with the bus bar 1 connecting two pole assemblies 20 of two adjacent cells.

The battery pack is a battery module or a battery pack.

The battery module includes a plurality of batteries, and the battery module may further include an end plate and a side plate for fixing the plurality of batteries.

The battery pack may include a battery case, and the plurality of batteries may be disposed in the battery case. A plurality of batteries can set up in the battery box after forming battery module, and a plurality of batteries can be fixed through end plate and curb plate. A plurality of batteries can directly set up in the battery box, need not to pack a plurality of batteries promptly, and at this moment, can get rid of end plate and curb plate.

Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the invention disclosed herein. This disclosure is intended to cover any variations, uses, or adaptations of the invention following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains. It is intended that the specification and example embodiments be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.

It will be understood that the present disclosure is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims

1. A battery, comprising:

a battery case (10);

the pole assembly (20), the pole assembly (20) is arranged on the battery shell (10), and at least part of the pole assembly (20) is positioned outside the battery shell (10);

a guard (30), the guard (30) disposed in the battery housing (10), at least a portion of the pole assembly (20) being located within the guard (30) to avoid adjacent batteries from crushing the pole assembly (20);

wherein the shield (30) exposes a connection surface (21) of the pole assembly (20) for connection with a busbar (1).

2. The battery according to claim 1, wherein the connecting surface (21) is not provided protruding the guard (30).

3. The battery of claim 1, wherein the guard (30) is disposed around an outer edge of the pole assembly (20).

4. The battery according to claim 1, wherein the guard (30) comprises an insulating portion; and/or the guard (30) is a hollow structure.

5. The battery according to any one of claims 1-4, characterized in that the pole assembly (20) comprises:

a terminal (22), at least a portion of the terminal (22) being located outside the battery housing (10), the terminal (22) being located within the guard (30), the terminal (22) including the connection surface (21);

a pole (23), the pole (23) being connected to the terminal (22), at least part of the pole (23) being located inside the battery case (10).

6. The battery according to claim 5, characterized in that the terminal (22) comprises:

a support portion (221), the support portion (221) being provided to the battery case (10), the pole post (23) being connected to the support portion (221), the guard (30) covering a circumferential outer edge of the support portion (221), a portion of the guard (30) being located on a side of the support portion (221) facing away from the battery case (10);

a connecting portion (222), the connecting portion (222) being connected to the supporting portion (221), the connecting portion (222) including the connecting surface (21), the protector (30) covering a circumferential outer edge of the connecting portion (222);

wherein an included angle is formed between the supporting part (221) and the connecting part (222).

7. The battery according to claim 5, characterized in that part of the pole (23) is located outside the battery housing (10);

wherein the protection element (30) is provided with a through hole (32), the through hole (32) being arranged opposite to the pole (23).

8. A battery pack characterized by comprising the battery according to any one of claims 1 to 7.

9. The battery pack according to claim 8, wherein a plurality of cells are arranged in sequence, and a recess (2) is provided in one of two adjacent cells, the recess (2) being adapted to receive a guard (30) of the other cell.

10. The battery according to claim 8 or 9, characterized in that it further comprises a busbar (1), the protection (30) comprising a limiting space (31), the connection surface (21) of the pole assembly (20) being located within the limiting space (31);

wherein a portion of the busbar (1) is confined in the confinement space (31) to be connected with the connection surface (21).