CN219591521U

CN219591521U - Secondary battery

Info

Publication number: CN219591521U
Application number: CN202320370968.8U
Authority: CN
Inventors: 安苏礼; 袁威; 舒宽金; 贺孝武; 郑旭; 王俊敏; 贾艳丽
Original assignee: Huizhou Eve Power Battery Co ltd; Hubei Eve Power Co Ltd
Current assignee: Huizhou Eve Power Battery Co ltd; Hubei Eve Power Co Ltd
Priority date: 2023-03-02
Filing date: 2023-03-02
Publication date: 2023-08-25
Anticipated expiration: 2033-03-02

Abstract

The utility model provides a secondary battery, which comprises a battery shell, wherein a plurality of battery core accommodating cavities are arranged in the battery shell, and each battery core accommodating cavity is provided with a positive electrode connecting piece and a negative plate connecting piece; the battery case also comprises positive and negative connecting pieces, and the positive connecting piece of at least one battery pack is connected with the negative connecting piece of another battery pack through the positive and negative connecting pieces. According to the utility model, the expansion of the battery structure is directly carried out, the multi-battery serial structure is formed by utilizing the multi-battery-core accommodating cavity and matching with the positive and negative connecting pieces, so that the battery voltage is improved, and meanwhile, the application of a battery module PACK is avoided, thereby solving the problem that the battery occupation space is overlarge due to the application of the battery module PACK.

Description

Secondary battery

Technical Field

The present utility model relates to a battery structure, and more particularly, to a secondary battery.

Background

The nominal voltage of a single cell of the conventional battery (particularly a square battery) is lower than 7V, so that when the battery is actually used, the battery PACK is required to be externally connected, a plurality of batteries are connected in series, and the voltage lifting effect is achieved, but the battery PACK is large in structure and low in space utilization rate, so that a large space is required to be reserved at the battery, waste in space is caused, and the problem of oversized product is caused.

Disclosure of Invention

The utility model provides a secondary battery, which can improve the battery voltage without using a battery module PACK.

The utility model provides a secondary battery, which comprises a battery shell, wherein a plurality of battery core accommodating cavities are arranged in the battery shell, and each battery core accommodating cavity is provided with a positive electrode connecting piece and a negative plate connecting piece; the battery case also comprises positive and negative connecting pieces, and the positive connecting piece of at least one cell accommodating cavity is connected with the negative connecting piece of the other cell accommodating cavity through the positive and negative connecting pieces.

Further, the battery case includes: the battery cell containing cavity is arranged in the shell, and the shell is detachably connected with the cover.

Further, the positive electrode connecting piece and the negative plate connecting piece are arranged on the cover body.

Further, an insert is arranged on the cover body, and the cover body can be fixedly inserted into the shell through the insert.

Further, a baffle plate is further arranged between the adjacent battery cell accommodating cavities, a sealing piece is further arranged on the cover body, and when the cover body is connected with the shell, the sealing piece is abutted to the baffle plate, so that the adjacent battery cell accommodating cavities are separated.

Furthermore, the positive plate connecting piece and the negative plate connecting piece are respectively sleeved with a sealing ring, and the positive plate connecting piece and the negative plate connecting piece are respectively abutted with the cover body through the sealing rings.

Still further, still be equipped with a plurality of locating part on the lid, the locating part edge is equipped with the spacing ring, anodal connecting piece, negative plate connecting piece locate on the locating part, just anodal connecting piece, negative plate connecting piece are located in the spacing ring.

Further, the battery cell accommodating cavity is internally provided with a battery cell, and the battery cell is internally provided with a Fuse fusing protection unit.

Furthermore, the battery case is also provided with a plurality of liquid injection holes, and the battery cell accommodating cavity is connected with the liquid injection holes.

Furthermore, the battery shell is also provided with a plurality of explosion-proof valve holes, and the battery core accommodating cavity is connected with the explosion-proof valve holes.

Compared with the prior art, the utility model directly expands the battery structure, utilizes the multi-cell accommodating cavity and is matched with the anode and cathode connecting piece to form a multi-battery serial structure, improves the battery voltage and simultaneously avoids the application of the battery module PACK, thereby solving the problem that the battery occupation space is overlarge due to the application of the battery module PACK.

Drawings

FIG. 1 is a schematic diagram of an exploded structure of an embodiment of the present utility model;

FIG. 2 is a schematic view of a cover structure according to an embodiment of the present utility model;

FIG. 3 is a schematic cross-sectional view of an embodiment of the present utility model;

fig. 4 is an enlarged view of the positive electrode connector in fig. 3.

1. A battery case; 11. a housing; 111. a baffle plate; 12. a cover body; 121. an insert; 122. a liquid injection hole; 123. an explosion-proof valve hole; 2. a cell receiving cavity; 31. a positive electrode connecting member; 32. a negative plate connector; 33. positive and negative electrode connecting pieces; 34. a positive plate; 35. a negative plate; 41. a seal; 42. a seal ring; 43. and a limiting piece.

Detailed Description

In order that those skilled in the art will better understand the present utility model, a technical solution in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in which it is apparent that the described embodiments are only some embodiments of the present utility model, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present utility model without making any inventive effort, shall fall within the scope of the present utility model.

It should be noted that the terms "first," "second," and the like in the description and the claims of the present utility model and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order.

The embodiment of the utility model discloses a secondary battery, as shown in fig. 1, which comprises a battery shell 1, wherein a plurality of battery cell accommodating cavities 2 are arranged in the battery shell 1, and each battery cell accommodating cavity 2 is provided with a positive electrode connecting piece 31 and a negative plate connecting piece 32; the battery case 1 further comprises a positive and negative electrode connecting piece 33, and the positive electrode connecting piece 31 of at least one cell accommodating cavity 2 is connected with the negative plate connecting piece 32 of the other cell accommodating cavity through the positive and negative electrode connecting piece 33.

As shown in fig. 1, the positive and negative electrode connectors 33 are in a sheet structure, and are respectively connected with the positive electrode connector 31 and the negative plate connector 32 to form a conductive structure. And the positive electrode connecting member 31 and the negative electrode connecting member 32, which are not connected to the positive electrode connecting member 33, are connected to the positive electrode sheet 34 and the negative electrode sheet 35, respectively. The battery case 1 is made of aluminum, and can be cast or extruded into a whole, so that the heat conduction effect is improved.

According to the embodiment of the utility model, the battery structure is expanded, the multi-cell accommodating cavity 2 is adopted and matched with the positive and negative connecting pieces 33 to form a multi-battery serial structure, so that the battery voltage is improved, and meanwhile, the application of a battery module PACK is avoided, and the problem that the battery occupation space is overlarge due to the application of the battery module PACK is solved.

It should be noted that the number of the cell housing chambers 2 is two in the embodiment of the present utility model, but those skilled in the art can set the number of the cell housing chambers to three or more according to the actual needs and the technology of the present utility model.

Alternatively, as shown in fig. 1, the battery case 1 includes a housing 11 and a cover 12, the battery cell accommodating cavity 2 is disposed in the housing 11, and the housing 11 is detachably connected to the cover 12.

In particular, as shown in fig. 1, the cover 12 is provided with an insert 121, and the cover 12 may be inserted and fixed with the housing 11 through the insert 121.

The cover 12 is provided with a plurality of plug-ins 121, which can be fixed with the housing 11 in a plugging manner, and can be fixed by matching with a connector, an adhesive and the like.

In particular, as shown in fig. 2, the positive electrode connector 31 and the negative electrode connector 32 are provided on the cover 12.

In particular, as shown in fig. 1, a baffle 111 is further disposed between adjacent cell accommodating chambers 2, the cover 12 is further provided with a sealing member 41, and when the cover 12 is connected to the housing 11, the sealing member 41 abuts against the baffle 111, so as to separate adjacent cell accommodating chambers 2.

Wherein the baffle 111 separates adjacent cell accommodating cavities 2, and cooperates with the sealing member 41 to form a sealed space in the cell accommodating cavities 2, so as to prevent cell electrolyte between the cell accommodating cavities 2 from mixing

In particular, as shown in fig. 3 and 4, the positive electrode connector 31 and the negative electrode connector 32 are respectively provided with a seal ring 42, and the positive electrode connector 31 and the negative electrode connector 32 are respectively abutted against the cover 12 through the seal rings 42.

The positive electrode connecting piece 31 and the negative plate connecting piece 32 are rod-shaped structures, and the sealing ring 42 is sleeved on the positive electrode connecting piece 31 and the negative plate connecting piece 32 and is abutted against the cover body 12, so that a sealing effect is achieved, and the sealing performance of the joint of the positive electrode connecting piece 31, the negative plate connecting piece 32 and the cover body 12 is improved.

In particular, as shown in fig. 3 and 4, the cover 12 is further provided with a plurality of limiting members 43, a limiting ring is disposed at an edge of the limiting members 43, the positive electrode connecting member 31 and the negative electrode connecting member 32 are disposed on the limiting members 43, and the positive electrode connecting member 31 and the negative electrode connecting member 32 are disposed in the limiting ring.

The limiting ring is an annular protrusion of the limiting piece 43, the positive and negative connecting piece 33, the positive plate 34 and the negative plate 35 are attached to the edge of the limiting ring, and the positive and negative connecting piece 33, the positive plate 34 and the negative plate 35 can be limited.

The limiting piece 43 is arranged, so that the positive plate connecting piece 31 and the negative plate connecting piece 32 are limited, and the probability of damaging the positive plate connecting piece 31 and the negative plate connecting piece 32 due to collision and the like is reduced.

Optionally, a battery cell is further arranged in the battery cell accommodating cavity 2, and a Fuse fusing protection unit is arranged in the battery cell.

Specifically, fuse is arranged on the thinning area of the positive electrode bottom plate, and the electrode post is connected with the terminal and electrode post bottom plate by laser.

According to the embodiment of the utility model, the Fuse fusing protection unit is adopted to effectively protect the inside of the battery cell, and when a single battery cell is damaged, the Fuse can be fused, so that the other battery cell can be normally applied.

In particular, as shown in fig. 1, the battery case 1 is further provided with a plurality of liquid injection holes 122, and the battery cell accommodating cavity 2 is connected with the liquid injection holes 122.

In the embodiment of the utility model, the liquid injection hole 122 is positioned at the side of the battery, and liquid injection into the battery can be realized through the liquid injection hole 122.

In particular, the battery case 1 is further provided with a plurality of explosion-proof valve holes 123, and the battery cell accommodating cavity 2 is connected with the explosion-proof valve holes 123.

The embodiment of the utility model improves the safety performance of the battery by arranging the explosion-proof valve hole 123.

Finally, it should be noted that the above-mentioned embodiments are only for illustrating the technical solution of the present utility model and not for limiting the same, and although the present utility model has been described in detail with reference to the above-mentioned embodiments, it should be understood by those skilled in the art that modifications and equivalents may be made to the specific embodiments of the present utility model after reading the present specification, and these modifications and variations do not depart from the scope of the utility model as claimed in the pending claims.

Claims

1. The secondary battery is characterized by comprising a battery shell, wherein a plurality of battery core accommodating cavities are arranged in the battery shell, and each battery core accommodating cavity is provided with a positive electrode connecting piece and a negative plate connecting piece; the battery case also comprises positive and negative connecting pieces, and the positive connecting piece of at least one cell accommodating cavity is connected with the negative connecting piece of the other cell accommodating cavity through the positive and negative connecting pieces.

2. The secondary battery according to claim 1, wherein the battery case comprises: the battery cell containing cavity is arranged in the shell, and the shell is detachably connected with the cover.

3. The secondary battery according to claim 2, wherein the positive electrode connecting member and the negative electrode connecting member are provided on the cap body.

4. The secondary battery according to claim 2, wherein the cover body is provided with an insert, and the cover body is inserted and fixed with the housing through the insert.

5. The secondary battery according to claim 2, wherein a baffle is further provided between adjacent ones of the cell accommodating chambers, the cover is further provided with a sealing member, and when the cover is connected to the case, the sealing member abuts against the baffle to separate the adjacent cell accommodating chambers from each other.

6. The secondary battery according to claim 3, wherein the positive electrode connecting member and the negative electrode connecting member are respectively provided with a sealing ring in a sleeved manner, and the positive electrode connecting member and the negative electrode connecting member are respectively abutted with the cover body through the sealing rings.

7. The secondary battery according to claim 6, wherein the cover body is further provided with a plurality of limiting members, limiting rings are arranged at edges of the limiting members, the positive electrode connecting member and the negative electrode connecting member are arranged on the limiting members, and the positive electrode connecting member and the negative electrode connecting member are located in the limiting rings.

8. The secondary battery according to claim 1, wherein a battery cell is further provided in the battery cell accommodating chamber, and a Fuse protection unit is provided in the battery cell.

9. The secondary battery according to any one of claims 1 to 8, wherein the battery case is further provided with a plurality of liquid injection holes, and the battery cell accommodation chamber is connected to the liquid injection holes.

10. The secondary battery according to any one of claims 1 to 8, wherein the battery case is further provided with a plurality of explosion-proof valve holes, and the battery cell receiving chamber is connected to the explosion-proof valve holes.