CN220021348U

CN220021348U - Battery and battery module

Info

Publication number: CN220021348U
Application number: CN202320896840.5U
Authority: CN
Inventors: 徐雨
Original assignee: Weilai Battery Technology Anhui Co ltd
Current assignee: Weilai Battery Technology Anhui Co ltd
Priority date: 2023-04-17
Filing date: 2023-04-17
Publication date: 2023-11-14
Anticipated expiration: 2033-04-17

Abstract

The utility model relates to the technical field of batteries, in particular to a battery and a battery module, and aims to solve the problem that the joint of a conventional battery pole and a housing is easy to seal and lose efficacy. For this purpose, the battery of the utility model comprises a housing; the pole is arranged on the shell; the first insulating piece is arranged between the shell and the pole and is suitable for insulating the pole from the shell; the first insulator comprises a first sub insulator and a second sub insulator connected with the first sub insulator, and the first sub insulator and the shell are fixed by riveting the pole. The utility model discloses a setting of first sub-insulator and second sub-insulator under the prerequisite of guaranteeing battery leakproofness, can prolong the life of battery, avoid revealing of battery liquid, promote user's use experience.

Description

Battery and battery module

Technical Field

The utility model relates to the technical field of batteries, and particularly provides a battery and a battery module.

Background

The tightness of the battery is an important guarantee for the service life and safety of the battery, and in order to improve the service life, the connection position of the pole post of the battery and the battery shell needs to be insulated and sealed to prevent the battery from leaking electricity so as to ensure the good performance of the battery, and when the battery is sealed, materials with good acid resistance, corrosion resistance, high temperature resistance and the like are needed.

The sealing ring is adopted in the prior art to seal the junction of the battery post and the battery shell, the sealing effect is poor, the sealing ring is easy to lose efficacy along with the time, battery liquid is caused to leak, the service life of the battery is shortened, and if the service life of the battery applied to the battery module of the vehicle is low, bad experience can be brought to a user.

In view of the above, the sealing performance of the junction between the battery post and the battery case needs to be further improved and perfected.

Accordingly, there is a need in the art for a new battery and battery module to solve the above problems.

Disclosure of Invention

The utility model aims to solve the technical problems, namely the problem that the joint of the existing battery pole and the shell is easy to seal and lose efficacy.

In a first aspect, the present utility model provides a battery comprising:

a housing;

the pole is arranged on the shell;

a first insulating member provided between the housing and the pole, adapted to insulate the pole from the housing;

the first insulator comprises a first sub insulator and a second sub insulator connected with the first sub insulator, and the first sub insulator and the shell are fixed by riveting the pole.

In a preferred embodiment of the above battery, the first sub-insulator is connected to the second sub-insulator in a lap joint manner.

In the preferred technical scheme of the battery, the first sub-insulator is provided with a first step portion, the second sub-insulator is provided with a second step portion, and the first step portion is matched with the second step portion under the condition that the first sub-insulator is lapped to the second sub-insulator.

In a preferred embodiment of the above battery, a first connecting portion is provided on the first step portion, and the first connecting portion is configured to be capable of fixing the second sub-insulator to the case; the second sub-insulator is provided with a second connecting part matched with the first connecting part, and the second sub-insulator is fixed on the shell under the condition that the second connecting part is connected with the first connecting part in place.

In the preferred technical scheme of the battery, the first sub-insulator is provided with a through hole through which the pole can pass, the first sub-insulator is provided with a filling part around the through hole, and the filling part is suitable for isolating the pole from the shell.

In the preferred technical scheme of the battery, a flanging structure is arranged on the second sub-insulator.

In the preferred technical scheme of the battery, the structural strength of the first sub-insulator is greater than that of the second sub-insulator,

and/or the number of the groups of groups,

the first sub-insulator has a temperature resistance greater than that of the second sub-insulator.

In a preferred embodiment of the above battery, the pole is configured such that a fixing structure is formed on the pole in a state where the pole is mounted in place, the fixing structure being configured to be capable of fixing the first sub-insulator and the second sub-insulator.

In the preferred technical scheme of the battery, the battery further comprises a second insulating piece, wherein the second insulating piece is positioned outside the shell and comprises a body and a boss structure arranged on the body;

the boss structure is arranged to surround the pole,

and/or one side of the body far away from the boss structure is provided with an inclined surface structure.

In a second aspect, the present utility model also provides a battery module comprising a battery as described in any of the above preferred techniques.

In the case of adopting the technical scheme, the battery comprises a shell; the pole is arranged on the shell; a first insulating member provided between the housing and the pole, adapted to insulate the pole from the housing; the first insulator comprises a first sub insulator and a second sub insulator connected with the first sub insulator, and the first sub insulator and the shell are fixed by riveting the pole. The utility model discloses a setting of first sub-insulator and second sub-insulator under the prerequisite of guaranteeing battery leakproofness, can prolong the life of battery, avoid revealing of battery liquid, promote user's use experience.

Drawings

Preferred embodiments of the present utility model are described below with reference to the accompanying drawings, in which:

FIG. 1 is a cross-sectional view of the structure of the battery housing and terminal connection of the present utility model;

FIG. 2 is an enlarged view of a portion of the structure of FIG. 1;

FIG. 3 is a block diagram of a first sub-insulator of the present utility model;

FIG. 4 is a block diagram of a second sub-insulator of the present utility model;

fig. 5 is a structural view of a second insulator of the present utility model;

reference numerals:

1. a housing; 11. a through hole; 2. a pole; 21. a first fixing portion; 22. a second fixing portion; 3. a second insulating member; 31. a body; 311. an inclined plane structure; 32. a boss structure; 4. a first insulating member; 41. a first sub-insulator; 411. a first connection portion; 412. a filling part; 413. a first step portion; 42. a second sub-insulator; 421. a second connecting portion; 422. a flanging structure; 423. a second step portion; 5. and a sealing member.

Detailed Description

Preferred embodiments of the present utility model are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are merely for explaining the technical principles of the present utility model, and are not intended to limit the scope of the present utility model. For example, the present utility model does not limit the specific type of the vehicle to which the battery or the battery module is applied, and a person skilled in the art can set the specific type of the vehicle according to the actual use requirements, such as a sedan type or an SUV type, which is not limited. Those skilled in the art can adapt it as desired to suit a particular application.

It should be noted that, in the description of the present utility model, terms such as "inner", "outer", "upper", "lower", and the like indicate directions or positional relationships based on the directions or positional relationships shown in the drawings, which are merely for convenience of description, and do not indicate or imply that the apparatus or elements must have a specific orientation, be constructed and operated in a specific orientation, and thus 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 relative importance.

Furthermore, it should be noted that, in the description of the present utility model, unless explicitly specified and limited otherwise, the terms "connected," "connected," and "connected" are to be construed broadly, and may be either a fixed connection or a removable connection, for example; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model can be understood by those skilled in the art according to the specific circumstances.

Referring first to fig. 1, as shown in fig. 1, the present utility model provides a battery, including: a housing 1; a pole 2, a first insulating member 4, the pole 2 being provided to the housing 1; the first insulating member 4 is arranged between the housing 1 and the pole 2 and is suitable for insulating the pole 2 from the housing 1; the first insulator 4 includes a first sub-insulator 41 and a second sub-insulator 42 connected to the first sub-insulator 41, and the pole 2 is riveted to fix the first sub-insulator 41 and the housing 1.

The inventor finds that when the insulating piece is riveted with the pole, the deformation of the insulating piece close to the pole is larger, so that the insulating piece deforms to different degrees, and the stability of the whole structure is weakened; through setting the first insulating part into the first sub-insulating part and the second sub-insulating part of connection, reduced the deformation volume that first sub-insulating part and utmost point post riveting produced, reduced the influence to the second sub-insulating part, be favorable to promoting first insulating part overall structure's stability. Specifically, referring to fig. 2 to 4, the first sub-insulator 41 is connected to the second sub-insulator 42 in a lap joint manner. The mounting of the first and second sub-insulators 41 and 42 is facilitated.

Further, in the present preferred example, the first sub-insulator 41 is provided with a first step 413, the second sub-insulator 42 is provided with a second step 423, and the first step 413 is fitted with the second step 423 in the case where the first sub-insulator 41 is overlapped to the second sub-insulator 42. Referring to fig. 2 to 4, the first step portion 413 is of a ring structure, the second step portion 423 is also of a ring structure, and when the first sub-insulator 41 is overlapped to the second sub-insulator 42, the first step portion 413 is sleeved inside the second step portion 423, and axes of the first step portion and the second step portion are overlapped.

Still further, referring to fig. 2, a first connecting portion 411 is provided on the first step portion 413, the first connecting portion 411 being provided so as to be able to fix the second sub-insulator 42 on the housing 1; the second sub-insulator 42 is provided with a second connection portion 421 that matches the first connection portion 411, and the second sub-insulator 42 is fixed to the housing 1 with the second connection portion 421 and the first connection portion 411 connected in place. Specifically, the first connection portion 411 is an annular protrusion extending from the circumferential outer side surface of the first step portion 413 in a direction away from the pole 2, the second connection portion 421 is an annular protrusion extending from the inner side surface of the second step portion 423 in a direction close to the pole 2, the first connection portion 411 is located below the second connection portion 421, when the pole 2 is mounted in place by a caulking process, the first sub-insulator 41 is fixed by the second fixing portion 22, the first connection portion 411 on the first sub-insulator 41 engages with the second connection portion 421, and the second connection portion 421 and the second sub-insulator 42 are connected in contact with the inner surface of the housing 1, thereby achieving fixation.

In the case that the first sub-insulator 41 and the second sub-insulator 42 are mounted in place, the first sub-insulator 41 is sleeved in the through hole of the second sub-insulator 42, the pole 2 is located in the through hole of the first sub-insulator 41, and the first connection portion 411 and the second connection portion 421 are both in a circular ring structure.

It should be noted that, the specific structures of the first connection portion 411 and the second connection portion 421 are not limited in the present utility model, for example, the first connection portion 411 is a plurality of protruding structures disposed on the first sub-insulator 41, the plurality of protruding structures are disposed circumferentially along the first sub-insulator 41, and the plurality of protruding structures and the inner surface of the housing 1 can compress the second connection portion 421 to fix the second connection portion 421 and the second sub-insulator 42; it is also possible that the second connection portion 421 is a plurality of protruding structures disposed on the second sub-insulator 42, the plurality of protruding structures are disposed circumferentially along the inner surface of the second sub-insulator 42, and the first connection portion 411 and the inner surface of the housing 1 can compress the plurality of protruding structures to fix the second connection portion 421 and the second sub-insulator 42, and this kind of structural change of the first connection portion 411 and the second connection portion 421 does not deviate from the basic principle of the present utility model, and therefore, it will also fall within the protection scope of the present utility model.

It will be understood by those skilled in the art that although the first step 413 and the second step 423 are connected by the first connection 411 and the second connection 421 in the present preferred example, this is not limitative, but in another preferred example, the first connection 411 and the second connection 421 are not provided, and the second step 423 is fixed to the case 1 by crimping only the first step 413, that is, in the case where the first step 413 and the second step 423 are connected in place, the second step 423 is located between the first step 413 and the case 1, and of course, it is also possible that the first step 413 is fixed to the case 1 by crimping the second step 423, that is, in the case where the first step 413 is located between the second step 423 and the case 1, and in this case, the second sub-insulator 42 and the case may be fixed by a fastener, so as to achieve the fixation of the second step 423, which may be set by a person skilled in the art according to the actual situation.

In another preferred example, the first sub-insulator 41 is not provided with the first step portion 413 and the first connection portion 411, the second sub-insulator 42 is not provided with the second step portion 423 and the second connection portion 421, the first sub-insulator 41 is fixedly pressed on the housing 1 by the second sub-insulator 42 in a lap joint manner, the first sub-insulator 41 and the second sub-insulator are both in a ring-shaped structure, and axes of the first sub-insulator 41 and the second sub-insulator are coincident, and regarding the specific structures of the first sub-insulator 41 and the second sub-insulator 42, a person skilled in the art can set the structure according to practical situations.

The battery comprises a shell 1, a pole 2, a second insulating piece 3 and a first insulating piece 4, wherein a through hole 11 is formed in one surface of the shell 1, the pole 2 is arranged in the through hole 11, the pole 2 is arranged in a mode that a fixing structure is formed on the pole 2 under the condition that the pole is in place, the fixing structure is used for fixing a first sub-insulating piece 41 and a second sub-insulating piece 42, the fixing structure is a first fixing part 21 and a second fixing part 22 which are respectively formed at two ends of the pole 2, the first fixing part 21 is positioned outside the shell 1, the second fixing part 22 is positioned in the shell 1, the second insulating piece 3 is arranged on the outer surface of the shell 1 and connected with the first fixing part 21, and the first insulating piece 4 is arranged on the inner surface of the shell 1 and connected with the second fixing part 22.

Specifically, with the direction shown in fig. 1 as the reference direction, the middle part above the casing 1 is provided with a through hole 11, the through hole 11 penetrates through the inner and outer walls of the casing 1, the first fixing part 21 of the pole 2 is located above the casing 1, the second insulating part 3 is arranged in the gap between the first fixing part 21 and the upper surface of the casing 1, the second fixing part 22 of the pole 2 is located below the casing 1, the first insulating part 4 is arranged in the gap between the second fixing part 22 and the lower surface of the casing 1, the first fixing part 21 is used for fixing the second insulating part 3 on the upper surface of the casing 1, the second fixing part 22 is used for fixing the first insulating part 4 on the lower surface of the casing 1, the second insulating part 3 and the first insulating part 4 can play a role in sealing the joint of the pole 2 and the through hole 11, the tightness of the battery is improved, and the service life of the battery is prolonged.

It should be noted that, the battery of the present utility model may include only the first insulating member 4, or may include both the first insulating member 4 and the second insulating member 3, which may be set by a person skilled in the art according to the actual situation.

In addition, it should be noted that in the preferred example including only the first insulating member 4, the fixing structure includes only the second fixing portion 22.

It will be appreciated by those skilled in the art that the electrode post 2 may be a positive electrode post or a negative electrode post, and may be set by those skilled in the art according to the actual situation.

Referring next to fig. 1 and 2 and fig. 5, in the preferred embodiment of the battery described above, the second insulating member 3 includes a body 31 and a boss structure 32 connected to each other, the body 31 being connected to the first fixing portion 21, the boss structure 32 being arranged so as to surround the wrapping post 2, i.e., the boss structure 32 being arranged so as to wrap the circumferential outer side surface of the first fixing portion 21. Specifically, the second insulating member 3 is annular, the body 31 is also annular, the upper surface of the body is in contact with the lower surface of the first fixing portion 21, the lower surface of the body is in contact with the upper surface of the housing 1, the outer side surface of the first fixing portion 21 is circumferentially wrapped by the inner side surface of the boss structure 32, the height of the upper surface of the boss structure 32 is lower than the height of the upper surface of the first fixing portion 21, and the tightness of the junction between the pole 2 and the through hole 11 can be further improved based on the structural arrangement.

It should be noted that the specific structure of the second insulating member 3 is not limited in the present utility model, for example, the body 31 is square ring-shaped, the boss structure 32 is also square ring-shaped, and the boss structure 32 may be a plurality of protruding structures surrounding the circumferential outer side surface of the first fixing portion 21, which can be set by a person skilled in the art according to practical situations.

In addition, the height of the upper surface of the boss structure 32 may be lower than the height of the upper surface of the first fixing portion 21, or the height of the upper surface of the boss structure 32 may be greater than or equal to the height of the upper surface of the first fixing portion 21, which may be set by a person skilled in the art according to the actual situation on the premise of ensuring the sealing performance.

Further, the battery further includes a sealing member 5, a sealing space is formed on the upper surfaces of the first fixing portion 21, the second insulating member 3 and the housing 1, the sealing member 5 is disposed in the sealing space, the sealing member 5 is a sealing ring, the sealing ring is sleeved on the pole 2, and sealing performance is further improved, it is noted that the sealing member 5 may be a rubber sealing ring or a silica gel sealing ring, an inner side surface of the sealing ring contacts with the pole 2, an outline of an outer side surface of the sealing ring may be square or circular, and a person skilled in the art may set the sealing ring according to actual situations.

With continued reference to fig. 2, as shown in fig. 2, the body 31 is further provided with a bevel structure 311, the bevel structure 311 is disposed on one side of the body 31 near the pole 2, and a gap is formed between the bevel structure 311 and the pole 2, so that metal scraps generated during the pole riveting process can drop onto the housing 1 to form a short circuit, and the bevel structure is disposed on the body 31, so that the metal scraps can be prevented from falling onto the housing 1, and the safety performance of the battery cell is enhanced.

Further, in the present preferred embodiment, the thickness of the sealing member 5 is greater than the thickness of the body 31. Specifically, in the case where the pole 2 is mounted in place by the caulking process, the lower surface of the first fixing portion 21 and the upper surface of the case 1 compress the sealing member 5 together, so that the thickness of the compressed sealing member 5 is equal to the thickness of the body 31, that is, the initial thickness of the sealing member 5 is greater than the thickness of the first fixing portion 21, the sealability can be further improved, and the body 31 can effectively prevent the sealing member 5 from being excessively compressed to cause sealing failure, prolong the service life of the sealing member 5, and further prolong the service life of the battery.

Referring next to fig. 1 to 4, the first insulating member 4 includes a first sub-insulating member 41 and a second sub-insulating member 42 connected to each other, a first end of the first sub-insulating member 41 is connected to the inner surface of the housing 1, a second end of the first sub-insulating member 41 is connected to the second fixing portion 22, and the second sub-insulating member 42 is connected to the inner surface of the housing 1. Specifically, with the direction shown in fig. 1 as the reference direction, the upper surface of the first sub-insulator 41 is in abutting connection with the lower surface of the housing 1, the lower surface of the first sub-insulator 41 is in abutting connection with the upper surface of the second fixing portion 22, under the condition that the pole 2 is in place, the second fixing portion 22 fixes the first sub-insulator 41 on the lower surface of the housing 1, the sealing performance is improved, the second sub-insulator 42 is fixed on the lower surface of the housing 1, the first sub-insulator 41 is close to the pole 2, the second sub-insulator 42 is far away from the pole 2, both the first sub-insulator 41 and the second sub-insulator 42 are made of plastic materials, the first sub-insulator 41 is made of plastic materials with harder materials, so that the structural strength of the first sub-insulator 41 is enough to resist the stress generated during riveting of the pole 2, the first sub-insulator 41 is prevented from deforming, the structural strength of the first sub-insulator 41 is larger than the structural strength of the second sub-insulator 42, the second sub-insulator 42 is made of common plastic materials with cheaper structural strength, and the production cost can be reduced.

It should be noted that, the specific materials of the first sub-insulator 41 and the second sub-insulator 42 are not limited in the present utility model, and may be plastic members or structural members made of other insulating materials, which can be set by those skilled in the art according to practical situations.

Further, the first sub-insulator 41 is provided with a through hole 11 through which the pole can pass, the first sub-insulator 41 is provided with a filling portion 412 around the through hole 11, and the filling portion 412 is adapted to isolate the pole 2 from the housing 1. Specifically, the first sub-insulator 41 is further provided with a filling portion 412, and the filling portion 412 is located in a gap between the inner side wall of the through hole 11 and the pole 2. The filling portion 412 has an annular structure so as to wrap the circumferential side wall of the pole 2, so that the sealing performance is improved, the upper surface of the filling portion 412 is connected with the lower surface of the sealing member 5 in an abutting manner, the sealing member 5 can be pressed tightly, the inner side surface of the filling portion 412 is abutted against the pole 2, and the sealing performance of the joint between the pole 2 and the through hole 11 can be improved.

It should be noted that, the specific structure of the filling portion 412 is not limited in the present utility model, for example, the filling portion 412 is a ring structure formed by two semicircular ring structures, or a ring structure formed by a plurality of arc structures, so long as the filling portion can play a role in filling a gap between the inner sidewall of the through hole 11 and the pole 2, and those skilled in the art can set the filling portion according to actual situations.

Further, in the present preferred embodiment, the first sub-insulator 41 has a temperature resistance greater than that of the second sub-insulator 42, and the first sub-insulator 41 has a structural strength greater than that of the second sub-insulator 42. Specifically, the first sub-insulator 41 and the second sub-insulator 42 are made of plastics with different materials, the first sub-insulator 41 is made of plastics with higher structural strength and better temperature resistance, the second sub-insulator 42 is made of plastics with common materials, and on the premise of ensuring that the first insulator 4 is close to the high temperature resistance of the position of the pole 2, the production cost can be reduced, and the dual effects of prolonging the service life of the battery and reducing the production cost are achieved.

Referring next to fig. 4, the second sub-insulator 42 is further provided with a flange structure 422, where the flange structure 422 is circumferentially disposed around the second sub-insulator 42, and the flange structure 422 can accommodate or partially accommodate current collecting plates and/or other components in the battery.

To sum up, this practicality is novel utilizes riveting technology, realize the sealing in the utmost point post 2 and the casing 1 outside through second insulating part 3 and first fixed part 21, realize the sealing of utmost point post 2 and casing 1 inboard through first insulating part 4 and second fixed part 22, its sealed effectual, can prolong the life of battery, and further promote the leakproofness through the setting of sealing member 5, can effectually prevent through the setting of body 31 that sealing member 5 from being compressed excessively and leading to sealed inefficacy, first sub-insulator 41 adopts structural strength higher and the material that the temperature resistance is better to make, second sub-insulator 42 adopts structural strength lower and the poor ordinary plastic material of temperature resistance, have played the dual effect of extension battery life and reduction in production cost.

It can be understood by those skilled in the art that the battery applied by the utility model can be a cylindrical battery or a square battery, and can be set by those skilled in the art according to practical situations.

In a second aspect, the utility model also claims a battery module comprising a battery as described in any of the above preferred embodiments.

Thus far, the technical solution of the present utility model has been described in connection with the preferred embodiments shown in the drawings, but it is easily understood by those skilled in the art that the scope of protection of the present utility model is not limited to these specific embodiments. Equivalent modifications and substitutions for related technical features may be made by those skilled in the art without departing from the principles of the present utility model, and such modifications and substitutions will fall within the scope of the present utility model.

Claims

1. A battery, the battery comprising:

a housing;

the pole is arranged on the shell;

2. The battery of claim 1, wherein the first sub-insulator is connected to the second sub-insulator in a lap joint.

3. The battery according to claim 2, wherein the first sub-insulator is provided with a first step portion, and the second sub-insulator is provided with a second step portion, the first step portion being adapted to the second step portion with the first sub-insulator overlapping the second sub-insulator.

4. The battery according to claim 3, wherein a first connecting portion is provided on the first step portion, the first connecting portion being provided so as to be able to fix the second sub-insulator on the case; the second sub-insulator is provided with a second connecting part matched with the first connecting part, and the second sub-insulator is fixed on the shell under the condition that the second connecting part is connected with the first connecting part in place.

5. The battery of claim 1, wherein the first sub-insulator is provided with a through hole through which the post is inserted, and wherein the first sub-insulator is provided with a filling portion around the through hole, the filling portion being adapted to isolate the post from the case.

6. The battery of claim 1, wherein the second sub-insulator is provided with a burring structure.

7. The battery of any one of claims 1 to 6, wherein the structural strength of the first sub-insulator is greater than the structural strength of the second sub-insulator,

and/or the number of the groups of groups,

8. The battery of any one of claims 1 to 6, wherein the post is configured such that, with the post in place, a securing structure is formed on the post, the securing structure being configured to secure the first and second sub-insulators.

9. The battery of claim 1, further comprising a second insulator located outside the housing, the second insulator comprising a body and a boss structure disposed on the body;

the boss structure is arranged to surround the pole,

10. A battery module comprising the battery according to any one of claims 1 to 9.