CN221009053U - Shell and battery cell with same - Google Patents

Abstract

The utility model discloses a shell and a battery cell with the same, wherein the shell defines a containing cavity, both ends of the containing cavity in the length direction of the shell are open, the shell comprises two first side plates which are oppositely arranged in the width direction of the shell, the first side plates are provided with first surfaces facing the containing cavity, the first surfaces are provided with supporting protrusions protruding towards the containing cavity, and the supporting protrusions are suitable for abutting against electrode assemblies arranged in the containing cavity. According to the shell, the structure of the battery cell can be simplified, so that the working procedures during production are simplified, the production efficiency is improved, the production cost is reduced, and the safety of the battery cell in the working process can be improved.

Description

Shell and battery cell with same

Technical Field

The utility model relates to the technical field of batteries, in particular to a shell and a battery monomer with the shell.

Background

The battery monomer is used as a basic component unit of the power battery, the safety of the battery monomer is critical to the safety of the power battery, an exhaust channel is usually arranged in the battery monomer, high-temperature and high-pressure gas in the battery monomer can be exhausted from the exhaust channel when the battery monomer is in thermal runaway, and in the related technology, the exhaust channel is formed by additionally arranging a supporting plate in a shell of the battery monomer, so that the structure of the battery monomer is complex, the working procedure is complex during production, and the production cost is increased.

Disclosure of utility model

The present utility model aims to solve at least one of the technical problems existing in the prior art. The utility model is based on the object of providing a housing which increases the production efficiency and reduces the production costs.

The utility model also provides a battery cell with the shell.

According to the case of the first aspect of the present utility model, the case defines the accommodation chamber, both ends of the accommodation chamber in the length direction of the case are open, the case includes two first side plates arranged opposite to each other in the width direction of the case, the first side plates have first surfaces facing the accommodation chamber, the first surfaces are formed with support protrusions protruding toward the accommodation chamber, and the support protrusions are adapted to abut against the electrode assembly provided in the accommodation chamber.

According to the shell of the first aspect of the utility model, the structure of the battery cell can be simplified, so that the working procedures during production are simplified, the production efficiency is improved, the production cost is reduced, and the safety of the battery cell in the working process can be improved.

In some embodiments of the utility model, in the length direction of the housing, a distance between the support protrusion and both end edges of the first side plate in the length direction is 5mm or more.

In some embodiments of the utility model, the height of the supporting protrusion protruding from the first surface is greater than or equal to 0.2mm.

In some embodiments of the utility model, a ratio of a height of the supporting protrusion protruding from the first surface to a width of the housing is 0.0625 or less.

In some embodiments of the present utility model, the number of the supporting protrusions is one, or the number of the supporting protrusions is a plurality, and the plurality of the supporting protrusions are arranged at intervals on the first surface.

In some embodiments of the present utility model, the supporting protrusions extend along a length direction of the housing, and the plurality of supporting protrusions are arranged at intervals in the length direction and/or the height direction of the housing.

In some embodiments of the present utility model, explosion-proof holes penetrating the first side plate in a thickness direction of the first side plate are formed on the first side plate, and the explosion-proof holes are spaced apart from the supporting protrusions.

In some embodiments of the present utility model, the number of the explosion-proof holes is one, or the number of the explosion-proof holes is a plurality of the explosion-proof holes, the explosion-proof holes are arranged at intervals along the length direction of the housing, and at least one supporting protrusion is disposed between two adjacent explosion-proof holes.

In some embodiments of the present utility model, a surface of the first side plate facing away from the accommodating cavity is a second surface, the supporting protrusion is formed by protruding a portion of the first side plate from the second surface toward the accommodating cavity, and the supporting protrusion encloses a groove on the second surface.

The battery cell according to the second aspect of the present utility model includes: the above-described housing according to the first aspect of the present utility model; the electrode assembly is arranged in the accommodating cavity and is abutted against the supporting protrusion; the two end covers are respectively covered at two ends of the shell in the length direction, and at least one end cover is provided with a pole column electrically connected with the electrode assembly.

According to the battery cell of the second aspect of the utility model, by arranging the shell according to the first aspect of the utility model, the structure of the battery cell can be simplified, so that the production process is simplified, the production efficiency is improved, and the production cost is reduced.

Additional aspects and advantages of the utility model will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the utility model.

Drawings

Fig. 1 is a front view of a battery cell according to an embodiment of the present utility model;

fig. 2 is a top view of the battery cell shown in fig. 1;

FIG. 3 is a cross-sectional view in the direction A-A shown in FIG. 2;

Fig. 4 is a left side view of the battery cell shown in fig. 2;

FIG. 5 is a cross-sectional view in the B-B direction shown in FIG. 4;

fig. 6 is a front view of a battery cell according to another embodiment of the present utility model.

Reference numerals:

100. A battery cell;

10. A housing; 11. a receiving chamber; 12. a first side plate; 121. a first surface; 122. a second surface; 123. explosion-proof holes; 13. a supporting protrusion; 14. a groove;

20. An electrode assembly;

30. An end cap; 31. a pole;

40. An explosion-proof valve.

Detailed Description

Embodiments of the present utility model are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative and intended to explain the present utility model and should not be construed as limiting the utility model.

A housing 10 according to an embodiment of the first aspect of the present utility model is described below with reference to fig. 1-6.

As shown in fig. 2 to 5, according to the case 10 of the first aspect embodiment of the present utility model, the case 10 defines the accommodation chamber 11, both ends of the accommodation chamber 11 in the longitudinal direction (e.g., the left-right direction shown in fig. 2) of the case 10 are open, the case 10 includes two first side plates 12 oppositely arranged in the width direction (e.g., the front-rear direction shown in fig. 2) of the case 10, the first side plates 12 have first surfaces 121 facing the accommodation chamber 11, the first surfaces 121 are formed with support protrusions 13 protruding toward the accommodation chamber 11, and the support protrusions 13 are adapted to abut against the electrode assemblies 20 provided in the accommodation chamber 11.

Wherein, the receiving chamber 11 is used for disposing the electrode assembly 20 for realizing the charge and discharge functions of the battery cells 100, and both ends of the receiving chamber 11 in the length direction of the case 10 are opened, so that the electrode assembly 20 can be easily disassembled and assembled in the case 10.

When the electrode assembly 20 is assembled into the receiving chamber 11, the supporting protrusions 13 may support the electrode assembly 20 such that a gap is formed between the electrode assembly 20 and the first surface 121, and it should be noted that the gap between the electrode assembly 20 and the first surface 121 communicates with the explosion-proof hole 123, so that an exhaust passage may be formed between the electrode assembly 20 and the first surface 121, and when the battery cell 100 is thermally out of control, high-temperature and high-pressure gas generated in the battery cell 100 may flow along the gap between the electrode assembly 20 and the first surface 121 and be discharged from the explosion-proof hole 123, thereby reducing the probability of thermal out of control, thereby improving the safety in the operation of the battery cell 100, and simultaneously simplifying the structure of the battery cell 100, thereby simplifying the process during production, improving the production efficiency, and reducing the production cost.

According to the case 10 of the embodiment of the first aspect of the present utility model, the structure of the battery cell 100 can be simplified, thereby simplifying the process during production, improving the production efficiency, reducing the production cost, and improving the safety during the operation of the battery cell 100.

In some embodiments of the present utility model, in the length direction of the housing 10, the distance between the support protrusion 13 and the both end edges of the first side plate 12 in the length direction is 5mm or more. For example, the interval between the support protrusion 13 and the both end edges of the first side plate 12 in the length direction may be 5mm, 7mm or 10mm, so that it is possible to ensure that there is sufficient exhaust space between the support protrusion 13 and the end edge of the housing 10 in the length direction, thereby making exhaust smoother, and the support protrusion 13 does not interfere with the end cap 30 when the housing 10 is coupled with the end cap 30, thereby making the end cap 30 smoothly coupled with the housing 10. In the process of product design, the distance between the supporting protrusion 13 and the two end edges of the first side plate 12 in the length direction can be adjusted, so that more design requirements can be met.

In some embodiments of the present utility model, the height of the supporting protrusion 13 protruding from the first surface 121 is 0.2mm or more. For example, the height of the supporting protrusions 13 protruding from the first surface 121 may be 0.2mm, 0.3mm, or 0.4mm, so that a sufficient gap between the electrode assembly 20 and the first surface 121 may be ensured, thereby ensuring exhaust efficiency. During the product design process, the height of the supporting protrusion 13 protruding from the first surface 121 can be adjusted, thereby satisfying more product design requirements.

In some embodiments of the present utility model, the ratio of the height of the supporting protrusion 13 protruding from the first surface 121 to the width of the housing 10 is less than or equal to 0.0625. For example, the ratio of the height of the supporting protrusions 13 protruding from the first surface 121 to the width of the case 10 may be 0.0625, 0.06, or 0.05, so that the interval between the electrode assembly 20 and the first surface 121 is not excessively large, thereby preventing the volume of the battery cell 100 from being excessively large, facilitating the arrangement of the battery cell 100, and the ratio of the height of the supporting protrusions 13 protruding from the first surface 121 to the width of the case 10 may be adjusted during the product design process, thereby satisfying more product design requirements.

In some embodiments of the present utility model, as shown in fig. 1, 3 and 6, the number of the supporting protrusions 13 is one, or the number of the supporting protrusions 13 is a plurality, for example, the supporting protrusions 13 may be one, two, three or four, and the plurality of supporting protrusions 13 may be spaced apart on the first surface 121. In this way, each of the support protrusions 13 may provide support for the electrode assembly 20, so that stability of the electrode assembly 20 in the receiving chamber 11 may be improved, thereby improving stability of the structure of the battery cell 100.

In some embodiments of the present utility model, as shown in fig. 1, 3 and 6, the supporting protrusions 13 extend in a length direction (e.g., a left-right direction as viewed in fig. 1) of the housing 10, and the plurality of supporting protrusions 13 are arranged at intervals in the length direction and/or height direction (e.g., an up-down direction as viewed in fig. 1) of the housing 10. That is, the plurality of supporting protrusions 13 may be arranged at intervals in the length direction of the housing 10, the plurality of supporting protrusions 13 may be arranged at intervals in the height direction of the housing 10, and the plurality of supporting protrusions 13 may be arranged at intervals in the length direction and the height direction of the housing 10, so that the distribution of the supporting protrusions 13 on the first surface 121 may be adjusted according to the design requirement, thereby meeting more design requirements and reducing the design difficulty of the product.

In some embodiments of the present utility model, as shown in fig. 5, explosion-proof holes 123 penetrating the first side plate 12 in the thickness direction of the first side plate 12 are formed on the first side plate 12, the explosion-proof holes 123 being spaced apart from the supporting protrusions 13. Through setting up explosion vent 123, when battery cell 100 takes place thermal runaway, the interior high temperature high pressure gas of battery cell 100 can follow explosion vent 123 discharge to reduce the probability that thermal runaway spread, improve the security in the battery cell 100 course of working, through explosion vent 123 and supporting bulge 13 interval arrangement, can make clearance and explosion vent 123 intercommunication between first surface 121 and electrode assembly 20, the interior high temperature high pressure gas of explosion proof chamber can follow the clearance between first surface 121 and electrode assembly 20 and flow to explosion vent 123, and then follow explosion vent 123 and discharge, thereby realize the exhaust of battery cell 100, and the accommodation space between explosion vent 123 and electrode assembly 20 is bigger, the probability that the flow direction is abrupt when high temperature high pressure gas flows out from explosion vent 123 is lower, thereby can make the exhaust more smooth and easy.

In some embodiments of the present utility model, as shown in fig. 1, 5 and 6, the number of explosion-proof holes 123 is one, or the number of explosion-proof holes 123 is plural, for example, the explosion-proof holes 123 may be one, two or four, the plurality of explosion-proof holes 123 are arranged at intervals along the length direction of the housing 10, and at least one supporting protrusion 13 is provided between two adjacent explosion-proof holes 123. Therefore, when the battery cell 100 is out of control, each explosion-proof hole 123 can exhaust, so that the exhaust efficiency can be improved, and the safety of the battery cell 100 in the working process can be further improved. Wherein, a plurality of explosion vents 123 are arranged along the length direction interval of casing 10, can increase the quantity of explosion vents 123 that can arrange on the casing 10, are provided with at least one support protrusion 13 between two adjacent explosion vents 123 and can guarantee that the intensity of first side board 12 satisfies the support demand of battery cell 100.

In some embodiments of the present utility model, as shown in fig. 3, a side surface of the first side plate 12 facing away from the accommodating cavity 11 is a second surface 122, the supporting protrusion 13 is formed by protruding a portion of the first side plate 12 from the second surface 122 toward the accommodating cavity 11, and the supporting protrusion 13 encloses the groove 14 on the second surface 122. Thus, the manufacturing process of the supporting protrusion 13 is simple, so that the manufacturing process of the housing 10 can be simplified, the production efficiency can be improved, and the production cost can be reduced, wherein the grooves 14 can provide a flowing space for the gas, and when other components are arranged outside the second surface 122, the gas can flow between the second surface 122 and the other components conveniently.

A battery cell 100 according to an embodiment of the second aspect of the present utility model is described below with reference to fig. 1 to 6.

The battery cell 100 according to the embodiment of the second aspect of the present utility model, as shown in fig. 2, 4 and 5, includes: the case 10, the electrode assembly 20, and the end cap 30 according to the embodiment of the first aspect of the present utility model described above.

Specifically, the electrode assembly 20 is disposed in the accommodating chamber 11 and abuts against the supporting protrusion 13, two end caps 30 are provided, the two end caps 30 are respectively capped at both ends in the longitudinal direction of the case 10, and at least one end cap 30 is provided with a post 31 electrically connected to the electrode assembly 20.

The electrode assembly 20 may realize a charge and discharge function of the battery cell 100, the end caps 30 may provide protection for the electrode assembly 20 at both ends of the casing 10 in the length direction, and the electrode posts 31 may realize electrical connection of the battery cell 100 with other elements.

According to the battery cell 100 of the second embodiment of the present utility model, by providing the case 10 according to the first embodiment of the present utility model as described above, the production efficiency can be improved and the production cost can be reduced.

In some implementations of the utility model, as shown in fig. 1, 5 and 6, the battery cell 100 further includes: explosion-proof valve 40, explosion-proof valve 40 locates explosion-proof hole 123 position, through setting up explosion-proof valve 40, when battery cell 100 normally works, explosion-proof valve 40 closes explosion-proof hole 123 to make battery cell 100 can normally work, when battery cell 100 takes place thermal runaway, explosion-proof valve 40 opens explosion-proof hole 123, thereby makes battery cell 100 can exhaust.

In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present utility model.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present utility model, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.

In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; the device can be mechanically connected, electrically connected and communicated; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present utility model. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.

While embodiments of the present utility model have been shown and described, it will be understood by those of ordinary skill in the art that: many changes, modifications, substitutions and variations may be made to the embodiments without departing from the spirit and principles of the utility model, the scope of which is defined by the claims and their equivalents.

Claims (10)

1. The utility model provides a casing, its characterized in that, the casing defines and holds the chamber, hold the chamber and be in the both ends in the length direction of casing are all open, the casing includes two first side plates of the width direction of casing relative arrangement, first side plate has the orientation hold the first surface in chamber, first surface is formed with the orientation hold the convex supporting bulge in chamber, supporting bulge is suitable for the butt and locates hold the electrode assembly in the chamber.

2. The housing according to claim 1, wherein a distance between the support projection and both end edges of the first side plate in the longitudinal direction of the housing is 5mm or more.

3. The housing of claim 1, wherein the support protrusions protrude from the first surface by a height of 0.2mm or more.

4. The housing of claim 1, wherein a ratio of a height of the support protrusion protruding from the first surface to a width of the housing is 0.0625 or less.

5. The housing of claim 1, wherein the number of support protrusions is one or the number of support protrusions is a plurality, the plurality of support protrusions being spaced apart on the first surface.

6. The housing according to claim 5, wherein the supporting protrusions extend in a longitudinal direction of the housing, and a plurality of the supporting protrusions are arranged at intervals in the longitudinal direction and/or the height direction of the housing.

7. The housing according to claim 1, wherein explosion-proof holes penetrating the first side plate in a thickness direction thereof are formed in the first side plate, the explosion-proof holes being arranged at intervals from the supporting protrusions.

8. The housing of claim 7, wherein the number of explosion-proof holes is one or a plurality of explosion-proof holes are arranged at intervals along the length direction of the housing, and at least one supporting protrusion is provided between two adjacent explosion-proof holes.

9. The housing of claim 1, wherein a side surface of the first side plate facing away from the receiving cavity is a second surface, the support protrusion is formed by a portion of the first side plate protruding from the second surface toward the receiving cavity, and the support protrusion defines a groove in the second surface.

10. A battery cell, comprising:

The housing according to any one of claims 1-9;

the electrode assembly is arranged in the accommodating cavity and is abutted against the supporting protrusion;

The two end covers are respectively covered at two ends of the shell in the length direction, and at least one end cover is provided with a pole column electrically connected with the electrode assembly.