CN210403832U

CN210403832U - Battery shell and power battery

Info

Publication number: CN210403832U
Application number: CN201921442122.0U
Authority: CN
Inventors: 王胜会; 苏家磊; 张俊川
Original assignee: Svolt Energy Technology Co Ltd
Current assignee: Svolt Energy Technology Co Ltd
Priority date: 2019-08-30
Filing date: 2019-08-30
Publication date: 2020-04-24
Anticipated expiration: 2029-08-30

Abstract

The utility model relates to a power battery equips technical field, specifically relates to a battery case and power battery. The battery shell comprises a frame and a plurality of cover plates, the frame is provided with a U-shaped groove, the cover plates are spliced and covered to form a sealing cover at an opening of the U-shaped groove, the U-shaped groove is formed, so that the U-shaped groove and the cover plates form a cavity for accommodating and fixing a plurality of battery cells, and the cover plates comprise positive installation parts for the battery cells and negative installation parts for the battery cells. This battery case is favorable to holding a plurality of electric core monomers simultaneously in the cavity that U type groove and a plurality of apron formed through setting up frame and a plurality of apron, is favorable to improving the energy density of electric core, through setting up a plurality of laps, has reduced a plurality of electric core monomers and has assembled the difficult degree of assembly in battery case's same cavity simultaneously.

Description

Battery shell and power battery

Technical Field

The utility model relates to a power battery equips technical field, specifically relates to a battery case and power battery.

Background

The lithium ion battery has the characteristics of large specific capacity, no memory effect, long service life and the like, and is more and more widely applied to the fields of new energy automobiles, energy storage and the like. The lithium ion battery used in the power automobile provides enough power for the electric automobile by connecting a plurality of single lithium ion batteries into a battery pack.

At present, with the requirement of the electric automobile for the endurance mileage becoming higher and higher, the energy density of the power battery of the electric automobile also needs to be improved. However, a plurality of single battery cells are usually connected in series or in parallel to serve as a power supply, and the single battery cell needs to be fixedly mounted through a single casing, so that a plurality of casings with the same number as the battery cells are usually arranged in the power supply, and further the casings occupy too much mounting space of the power supply, thereby reducing the energy density of the battery cells and causing poor use effect of the power supply.

SUMMERY OF THE UTILITY MODEL

The utility model aims to overcome the problems of excessive space occupation of the shell and low energy density of the battery core caused by the fact that a plurality of battery core monomers are required to be respectively installed on a plurality of battery core shells of a power supply formed by connecting a plurality of battery core monomers in series and in parallel in the prior art, and provides a battery shell and a power battery, wherein the battery shell is favorable for simultaneously accommodating a plurality of battery core monomers in a cavity formed by a U-shaped groove and a plurality of cover plates by arranging a frame and a plurality of cover plates, avoids the phenomenon that the adjacent side walls of two adjacent battery shells occupy excessive space caused by respectively installing a plurality of battery core monomers on a plurality of battery shells in the prior art, improves the space occupancy rate of the battery core monomers, is favorable for improving the energy density of the battery core, and is provided with a plurality of cover plates, so that a plurality of battery core monomers can be reasonably assembled through the plurality of cover plates when a plurality of battery core monomers are simultaneously, the assembly difficulty that a plurality of electric core monomers are assembled into the same cavity of the battery shell at the same time is reduced, and the firmness of the electric core monomers is ensured.

In order to achieve the above object, an aspect of the present invention provides a battery casing, battery casing includes frame and a plurality of apron, the frame is provided with U type groove, and is a plurality of apron amalgamation lid is established the opening in U type groove is located the closing cap U type groove, so that U type groove and a plurality of form between the apron and be used for holding and fix the free cavity of a plurality of electric cores, the apron including be used for with the anodal installation department of the free anodal adaptation of electric core and with the negative pole installation department of the free negative pole adaptation of electric core.

Optionally, a step circumferential surface is formed on an inner edge of the U-shaped groove at the opening, and the cover plate is stopped on the step circumferential surface to be accommodated in the U-shaped groove.

Optionally, the U-shaped groove includes a bending portion extending outward, the bending portion includes a circumferential surface and a circumferential surface, the circumferential surface is connected to the outer edge of the circumferential surface of the step and extends in a direction away from the bottom of the U-shaped groove to form the opening, and the circumferential surface is matched with the side wall of the cover plate.

Optionally, the step circumference of the U-shaped groove extends obliquely upward from the inner wall of the U-shaped groove.

Optionally, the opening is configured as a rectangular structure, the cover plate is configured as a rectangular plate, and the cover plates are connected and arranged along a long side direction of the opening or along a short side direction of the opening.

Optionally, along a plurality of the direction that the apron was arranged in proper order:

a plurality of the positive electrode mounting parts and a plurality of the negative electrode mounting parts are alternately arranged,

alternatively, the plurality of positive electrode mounting portions are provided in this order.

Optionally, the battery case includes at least one of the following forms:

the first form: at least one of the cover plates comprises a liquid injection port;

the second form: the frame is made of insulating materials;

the third form: the positive electrode mounting part and the negative electrode mounting part are provided with conductive materials;

form four: four corners of the opening are provided with round corners, and the cover plate is matched with the four corners and is provided with a round corner structure matched with the round corners.

Optionally, at least one of the cover plates of the plurality of cover plates comprises an explosion-proof valve.

Optionally, the explosion-proof valve is arranged at the central position of the cover plate.

The utility model discloses the second aspect provides a power battery, power battery include a plurality of battery monomer and battery case, it is a plurality of electric core monomer holds simultaneously and fixes in the cavity, and is a plurality of electric core free positive pole respectively with a plurality of positive pole installation department adaptation, it is a plurality of electric core free negative pole respectively with a plurality of negative pole installation department adaptation.

According to the technical scheme, the utility model provides a battery shell and power battery, this battery shell is through setting up frame and a plurality of apron, be favorable to holding a plurality of electric core monomers simultaneously in the cavity that U type groove and a plurality of apron formed, the adjacent lateral wall of two adjacent battery shell that has avoided in the prior art to install a plurality of electric core monomers respectively and lead to a plurality of battery shell occupies unnecessary space, the free space occupancy of electric core has been improved, be favorable to improving the energy density of electric core, moreover, this battery shell is provided with a plurality of laps, can rationally assemble a plurality of electric core monomers through a plurality of laps when making in the cavity of battery shell install a plurality of electric core monomers simultaneously, the assembly degree of difficulty in the same cavity of battery shell has been assembled simultaneously to a plurality of electric core monomers has been reduced, the free fastness of electric core has been guaranteed.

Drawings

Fig. 1 is a schematic structural view of a housing provided in a first embodiment of the present invention;

FIG. 2 is a top view of the housing shown in FIG. 1;

fig. 3 is a schematic structural diagram of a housing provided in a second embodiment of the present invention;

FIG. 4 is a top view of the housing shown in FIG. 3;

fig. 5 is a schematic structural view of a housing provided in a third embodiment of the present invention;

FIG. 6 is a top view of the housing shown in FIG. 5;

FIG. 7 is an enlarged fragmentary view of a first mating relationship between the U-shaped channel and the cover plate shown in section A of FIG. 5;

fig. 8 is an enlarged partial view of a second mating relationship between the U-shaped channel and the cover plate shown in section a of fig. 5.

Description of the reference numerals

1. A battery case; 2. a frame; 21. a step peripheral surface; 22. a bending section; 23. a mating peripheral surface;

3. a cover plate; 31. a positive electrode mounting part; 32. a negative electrode mounting part; 33. a liquid injection port; 34. an explosion-proof valve.

Detailed Description

The following detailed description of the embodiments of the present invention will be made with reference to the accompanying drawings. It is to be understood that the description of the embodiments herein is for purposes of illustration and explanation only and is not intended to limit the invention.

An aspect of the present invention provides a battery casing, as shown in fig. 1-8, battery casing 1 includes frame 2 and a plurality of apron 3, frame 2 is provided with U type groove, and is a plurality of 3 amalgamation covers of apron are established the opening in U type groove is in the closing cap U type groove, so that U type groove and a plurality of form between the apron 3 and be used for holding and fix the free cavity of a plurality of electric cores, apron 3 including be used for with the anodal installation department 31 of the free anodal adaptation of electric core and with the negative pole installation department 32 of the free negative pole adaptation of electric core.

Through the technical scheme, the utility model provides a battery shell 1 and a power battery, the battery shell 1 is provided with a frame 2 and a plurality of cover plates 3, which is beneficial to accommodating a plurality of battery cell monomers in a cavity formed by a U-shaped groove and a plurality of cover plates 3, avoids the occupation of redundant space by the adjacent side walls of two adjacent battery shells caused by respectively installing a plurality of battery cell monomers on a plurality of battery shells in the prior art, improves the space occupancy rate of the battery cell monomers, is beneficial to improving the energy density of the battery cell, and in addition, this battery case is provided with a plurality of apron 3 for can reasonably assemble a plurality of electric core monomers through a plurality of apron 3 when installing a plurality of electric core monomers simultaneously in battery case's the cavity, reduce the assembly degree of difficulty that a plurality of electric core monomers assembled battery case's same cavity simultaneously, guarantee the free fastness of electric core.

As shown in fig. 7, the U-shaped groove is in the inner edge of the opening is formed with a circumferential surface 21 of the step, the cover plate 3 stops at the circumferential surface 21 of the step to be accommodated in the U-shaped groove, so that the problem that the cover plate 3 caused by the arrangement of the plurality of cover plates 3 cannot be installed on the U-shaped groove according to a uniform assembly standard is avoided, the installation uniformity of the plurality of cover plates is optimized, the installation quality of the battery shell is ensured, and therefore the stable installation of the plurality of battery cell monomers is realized, and the processing is convenient.

As shown in fig. 8, the U-shaped groove includes the outwardly extending bent portion 22, the bent portion 22 includes the fitting peripheral surface 23 and the step peripheral surface 21, the fitting peripheral surface 23 is connected to the outer edge of the step peripheral surface 21 and extends along the direction deviating from the groove bottom of the U-shaped groove to form the opening, the fitting peripheral surface 23 is fitted with the side wall of the cover plate 3, and by setting the outwardly protruding bent portion 22, it is avoided that the cover plate 3, which is caused by setting a plurality of cover plates 3, is not installed on the U-shaped groove according to a uniform assembly standard, the installation uniformity of the plurality of cover plates is optimized, and the installation quality of the battery casing is ensured, so that a plurality of battery cells are stably installed at the same time, the material used for the frame 2 is reduced, and the manufacturing cost of the battery casing 1 is reduced.

Further, as shown in fig. 7 and 8, the step in U type groove is global 21 follows the inner wall slope in U type groove upwards extends to the apron overlap joint is global 21 at the step, makes to connect through the mode of line contact between apron 3 and the step is global 21, has solved when the bottom surface of U type groove and apron adopts the connected mode of face contact because of the not high or defect such as convex surface of machining precision of U type groove at the opening part leads to the problem that the assembly degree of difficulty is high. The U-shaped groove and the cover plate can be assembled in various reasonable manners, for example, welding is adopted, and the welding operation between the step circumferential surface 21 and the cover plate 3 is facilitated by adopting a line contact manner.

According to the utility model discloses, use the electric core monomer of rectangle as an example, battery case 1 sets up to the rectangle, for example, the opening sets up to the rectangle structure, apron 3 sets up to the rectangular plate, and is a plurality of apron 3 is followed open-ended long limit direction perhaps follows open-ended minor face direction links up the setting, and the free placing of electric core of being convenient for is favorable to the quick installation of apron, elegant appearance. Each cover plate can be provided with one battery cell monomer or a plurality of battery cell monomers; in order to improve the installation firmness of the single battery cell and reduce the assembly difficulty between the single battery cell and the cover plates, each cover plate is used for assembling one single battery cell, namely each cover plate comprises a positive electrode installation part and a negative electrode installation part; specifically, as shown in fig. 1, the positive and negative electrodes of the cell units are arranged toward the top shown in fig. 1, so that the positive and negative electrodes of the cell units are respectively matched with the positive installation part and the negative installation part of the cover plate 3, the plurality of cell units are sequentially arranged along the left and right directions shown in fig. 1, and the plurality of cover plates are also sequentially arranged along the left and right directions shown in fig. 1, so that each cell unit can be correspondingly arranged with each cover plate and assembled together.

According to the utility model discloses, battery housing can satisfy the different user demands of battery through adjusting the apron, for example, the battery needs to be set for large capacity battery, then: along the direction in which the cover plates 3 are sequentially arranged, the positive electrode mounting parts 31 are sequentially arranged, so that a plurality of battery cell monomers are arranged in parallel, and a large-capacity battery is obtained; for example, if the battery needs to be set to a high voltage battery, then: the positive electrode mounting portions 31 and the negative electrode mounting portions 32 are alternately arranged in a direction in which the plurality of cover plates 3 are sequentially arranged, thereby obtaining a high-voltage battery.

As shown in fig. 1 to 6, at least one of the cover plates 3 includes a liquid injection port 33 to facilitate a liquid injection operation into the battery case. Preferably, each cover plate is provided with a liquid injection port 33, so that the circulation path of the electrolyte for the battery shell is increased, and the electrolyte can rapidly infiltrate the battery pole group.

Furthermore, the frame 2 is made of insulating materials, so that the safety is good.

Further, the positive electrode mounting part 31 and the negative electrode mounting part 32 are provided with a conductive material (for example, a metal material) so as to facilitate the electrical core monomer to be in conductive communication with an external electrical appliance through the cover plate. Specifically, the positive electrode mounting portion 31 is formed with a mounting point for assembling with a conductive point of a positive electrode of the battery cell unit, the mounting point of the positive electrode mounting portion 31 is made of a conductive material so as to be in conductive communication with the positive electrode of the battery cell unit, and the rest of the positive electrode mounting portion 31 may be made of an insulating material; the negative electrode mounting part 32 can refer to the specific arrangement of the positive electrode mounting part 31, and will not be described in detail herein. In addition, the cover plate except for the positive electrode mounting portion and the negative electrode mounting portion may be made of an insulating material (e.g., a resin material), and safety performance is high.

As shown in fig. 2, 4 and 6, four corners of the opening are set to be round corners, and the cover plate 3 matched with the four corners is provided with a round corner structure matched with the round corners, so that the installation is convenient, and the assembly between the cover plate 3 and the frame is firmer and more reliable.

As shown in fig. 1 to 6, at least one of the cover plates 3 of the plurality of cover plates 3 includes an explosion-proof valve 34, which is advantageous for the battery case to have excellent explosion-proof performance. Preferably, each cover plate is provided with an explosion-proof valve 34, optimizing the explosion-proof performance of the battery case.

Further, the explosion-proof valve 34 is disposed at the center of the cover plate 3, which is beneficial for the explosion-proof valve 34 to receive the impact action exerted by the internal structure of the battery case (such as the electrolyte or the battery pole group, etc.), and the safety performance is better.

The utility model discloses the second aspect still provides a power battery, as shown in fig. 1-6, power battery include a plurality of battery monomers and battery housing 1, a plurality of the battery cell monomer holds and fixes simultaneously in the cavity, and a plurality of the free anodal of electric core is respectively with a plurality of anodal installation department 31 adaptation, a plurality of the free negative pole of electric core is respectively with a plurality of negative pole installation department 32 adaptation.

According to the technical scheme, the utility model provides a power battery, this power battery can hold the free battery case 1 of a plurality of electric cores simultaneously through setting up, the adjacent lateral wall of two adjacent battery cases that has avoided in the prior art to install a plurality of electric core monomers respectively with a plurality of battery cases and lead to occupies unnecessary space, the free space occupancy of electric core has been improved, be favorable to improving the energy density of electric core, and, this battery case is provided with a plurality of apron 3, can reasonably assemble a plurality of electric core monomers through a plurality of apron 3 when making a plurality of electric core monomers of installation simultaneously in battery case's the cavity, the assembly degree of difficulty in a plurality of electric core monomers assemble battery case's same cavity simultaneously has been reduced, the free fastness of electric core has been guaranteed.

The preferred embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited thereto. In the technical idea scope of the present invention, it is possible to provide a solution of the present invention with a plurality of simple modifications to avoid unnecessary repetition, and the present invention is not described separately for various possible combinations. These simple variations and combinations should also be considered as disclosed in the present invention, all falling within the scope of protection of the present invention.

Claims

1. A battery case, characterized in that the battery case (1) comprises a frame (2) and a plurality of cover plates (3), the frame (2) is provided with a U-shaped groove, and a plurality of the A cover plate (3) is assembled and provided at the opening of the U-shaped groove to cover the U-shaped groove, so that the U-shaped groove and a plurality of the cover plates (3) are formed for accommodating and fixing A chamber of a plurality of battery cells, the cover plate (3) includes a positive electrode mounting portion (31) adapted to be adapted to the positive electrode of the battery cell and adapted to the negative electrode of the battery cell the negative electrode mounting part (32).

2 . The battery case according to claim 1 , wherein a stepped peripheral surface ( 21 ) is formed on the inner edge of the U-shaped groove at the opening, and the cover plate ( 3 ) stops at the inner edge of the opening. 3 . The step peripheral surface (21) is accommodated in the U-shaped groove.

3 . The battery case according to claim 2 , wherein the U-shaped groove comprises a bent portion ( 22 ) expanding outward, and the bent portion ( 22 ) comprises a matching peripheral surface ( 23 ) and the stepped peripheral surface (21), the mating peripheral surface (23) is connected to the outer edge of the stepped peripheral surface (21) and extends in a direction away from the groove bottom of the U-shaped groove to form the opening, The matching peripheral surface (23) is matched with the side wall of the cover plate (3).

4. The battery case according to claim 1 or 2, characterized in that the stepped peripheral surface (21) of the U-shaped groove extends obliquely upward from the inner wall of the U-shaped groove.

5 . The battery case according to claim 1 , wherein the opening is configured as a rectangular structure, the cover plate ( 3 ) is configured as a rectangular plate, and a plurality of the cover plates ( 3 ) are arranged along the opening. 6 . The long-side direction of the openings or the short-side directions of the openings are connected.

6. The battery case according to claim 5, characterized in that, along the direction in which the plurality of cover plates (3) are arranged in sequence:

A plurality of the positive electrode mounting parts (31) and a plurality of the negative electrode mounting parts (32) are alternately arranged,

Alternatively, a plurality of the positive electrode mounting parts (31) are arranged in sequence.

7. The battery case according to claim 1, wherein the battery case (1) comprises at least one of the following forms:

Form 1: at least one of the plurality of cover plates (3) includes a liquid injection port (33);

Form 2: the frame (2) is made of insulating material;

Form three: the positive electrode mounting portion (31) and the negative electrode mounting portion (32) are provided with conductive materials;

Form 4: The four corners of the opening are provided with rounded corners, and the cover plate (3) matched with the four corners is provided with a rounded corner structure adapted to the rounded corners.

8. The battery case according to claim 1, characterized in that, at least one of the cover plates (3) among the plurality of cover plates (3) comprises an explosion-proof valve (34).

9 . The battery case according to claim 8 , wherein the explosion-proof valve ( 34 ) is arranged at a central position of the cover plate ( 3 ). 10 .

10. A power battery, characterized in that the power battery comprises a plurality of battery cells and the battery case (1) according to any one of claims 1-9, a plurality of the battery cells At the same time, it is accommodated and fixed in the cavity, and the positive electrodes of the plurality of battery cells are respectively adapted to the plurality of the positive electrode mounting parts (31), and the negative electrodes of the plurality of battery cells are respectively matched with the plurality of positive electrode mounting parts (31). The negative electrode mounting portion (32) is adapted.