CN218939877U

CN218939877U - Sealing member and battery pack

Info

Publication number: CN218939877U
Application number: CN202223199212.6U
Authority: CN
Inventors: 高科; 陈保国; 刘峰; 彭月猛
Original assignee: Tianjin EV Energies Co Ltd
Current assignee: Tianjin EV Energies Co Ltd
Priority date: 2022-11-30
Filing date: 2022-11-30
Publication date: 2023-04-28
Anticipated expiration: 2032-11-30

Abstract

The utility model belongs to the technical field of power batteries, and discloses a sealing element and a battery pack. The sealing element comprises a main body part, a plurality of grooves and a plurality of protrusions are arranged on the main body part, the grooves are symmetrically arranged on two sides of the width direction of the main body part, the plurality of grooves are arranged at equal intervals along the length direction of the main body part, and the main body part where two grooves in each group are symmetrically arranged is a concave part; the bulges are symmetrically arranged on two sides of the width direction of the main body part, a plurality of bulges are arranged at equal intervals along the length direction of the main body part, and the appearance of the bulges is the same as that of the grooves; the main body part where each group of two symmetrically arranged bulges is provided with a convex part; the concave parts and the convex parts are arranged in a staggered way along the length direction of the sealing piece, and a through hole is formed in the center of the convex part. The structure can ensure that the rebound force of the sealing element on the upper cover in the width direction is consistent, solves the deflection risk of the upper cover, ensures good tightness of the battery pack, and reduces the cost.

Description

Sealing member and battery pack

Technical Field

The utility model relates to the technical field of power batteries, in particular to a sealing element and a battery pack.

Background

In the field of power cells, energy density, cost reduction and safety are currently a concern in this field. For the power battery, the internal sealing of the power battery can ensure that external substances cannot enter the battery pack, so that the safety of the battery pack can be improved. The most common method for sealing the battery pack is to assemble a prefabricated elastic sealing element to the sealing surface of the box body, and compress the sealing element by the upper cover and the box body under the tightening of the fastening piece, so that the battery pack is sealed. The existing sealing element adopts a regular strip shape, and has the advantages of regular shape, but a wider material substrate is needed, so that the material utilization rate is low, and the cost is relatively high.

In the prior art, for example, early patent CN206834216U discloses a power battery sealing gasket and a plate layout structure for manufacturing the same, by arranging a protruding part and a groove between two mounting holes of the sealing gasket, the sealing gasket is uniformly stressed, the sealing reliability is improved, and the risk of sealing failure of a battery pack is reduced; and the plate layout structure adopting the sealing gasket structure saves the material consumption and reduces the manufacturing cost. Compared with the strip-shaped scheme with the specification, the scheme improves the material utilization rate by 8.9%, but has the following technical problems:

1. the sealing gasket is of an asymmetric structure in the width direction, when the sealing gasket is compressed, the resilience force of the upper cover is unbalanced in the width direction, the resilience force of the upper cover is easy to be smaller, the upper cover is at a deflection risk, and sealing failure is easy to be caused.

2. After the sealing gaskets are cut, the middle part is an arc surface, so that each sealing gasket is also required to be cut by the arc surface independently, one-time cutting processing is added, and the processing cost is increased.

Therefore, there is a need to design a sealing member and a battery pack to solve the above technical problems.

Disclosure of Invention

The utility model aims to provide a sealing element, which can ensure that the resilience force of the sealing element to an upper cover in the width direction is consistent, solve the deflection risk of the upper cover, and simultaneously avoid the need of cutting the adjacent sealing elements singly when the adjacent sealing elements are cut and molded, reduce the cutting times and reduce the cost.

Another object of the present utility model is to provide a battery pack that can ensure good sealability and reduce costs.

To achieve the purpose, the utility model adopts the following technical scheme:

and a seal member including a main body portion provided with:

the grooves are symmetrically formed in two lateral sides of the width direction of the main body part, the grooves are arranged at equal intervals along the length direction of the main body part, and the main body part where each group of two symmetrically arranged grooves is located is a concave part;

a plurality of protrusions symmetrically arranged on two sides of the width direction of the main body part, wherein the protrusions are arranged at equal intervals along the length direction of the main body part, and the shapes of the protrusions are the same as the shapes of the grooves; the main body part where each group of two bulges are symmetrically arranged is a convex part; one convex part is arranged between two adjacent concave parts, one concave part is arranged between two adjacent convex parts, and a through hole is formed in the center of each convex part.

Alternatively, the width of the convex portion is 20mm-25mm.

Optionally, the width of the recess is 12mm-17mm.

Optionally, the shortest distance between the hole wall of the through hole and the protrusion is greater than or equal to 6mm.

Optionally, the seal has a compression of 25% to 50%.

Optionally, the material of the sealing element is silica gel foam.

Optionally, the main body part is provided with a plurality of main body parts, and the main body parts are connected end to end.

Optionally, each of the main body portions is provided with a first engagement portion and a second engagement portion along two sides of a length direction thereof, the first engagement portion and the second engagement portion are in shape-fit, and the first engagement portion on one of the main body portions can be in mortise-tenon connection with the second engagement portion on the other main body portion.

Optionally, a glue layer is disposed on one side of the main body.

The battery pack comprises a battery, a box body, an upper cover and the sealing element, wherein the battery is arranged in the box body, the upper cover is arranged on the box body, and the sealing element is clamped between the box body and the upper cover.

The utility model has the beneficial effects that:

the utility model provides a sealing element, which is provided with a plurality of convex parts and grooves, and a through hole is arranged at the center of the convex parts, so that the use of materials is reduced as much as possible when the sealing of a battery pack is met, the utilization rate of the materials is improved, and the cost is reduced. Meanwhile, the sealing elements are symmetrically arranged along the central axis of the sealing elements, so that the resilience force of the sealing elements to the upper cover in the width direction is consistent, and the deflection risk of the upper cover is solved. Moreover, the appearance of protruding and recess is the same for when the sealing member was makeed, a plurality of sealing members arrange side by side on this preparation substrate, in two adjacent sealing members, protruding in any one sealing member can be connected with the recess of another sealing member, and protruding and recess laminating completely, avoided the follow-up individual cutting to the sealing member, reduced the cutting number of times, the cost is reduced.

The utility model also provides a battery pack, and the sealing part is arranged at the sealing part between the box body and the upper cover, so that the battery pack can realize cost reduction, and meanwhile, the good sealing effect of the battery pack can be still met, the battery in the box body is prevented from being contacted with external substances, and further, the potential safety hazard of the battery pack is avoided.

Drawings

FIG. 1 is a schematic view of a seal provided in accordance with an embodiment of the present utility model;

fig. 2 is a schematic structural view of a substrate arrangement for making a seal according to an embodiment of the present utility model.

In the figure:

100. a main body portion; 10. a concave portion; 11. a groove; 20. a convex portion; 21. a protrusion; 30. a through hole; 40. a first engagement portion; 50. and a second engagement portion.

Detailed Description

The utility model is described in further detail below with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the utility model and are not limiting thereof. It should be further noted that, for convenience of description, only some, but not all of the structures related to the present utility model are shown in the drawings.

In the description of the present utility model, unless explicitly stated and limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; 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 will be understood in specific cases by those of ordinary skill in the art.

In the present utility model, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.

In the description of the present embodiment, the terms "upper", "lower", "right", etc. orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, and are merely for convenience of description and simplicity of operation, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the utility model. Furthermore, the terms "first," "second," and the like, are used merely for distinguishing between descriptions and not for distinguishing between them.

At present, as the new energy industry starts paying attention to cost reduction, the cost reduction can not be achieved while the cost reduction is carried out, although the existing sealing element is cut, the cost can be reduced to a certain extent, the cost reduction is achieved effectively, the resilience force of one side of the sealing element in the width direction to the upper cover is slightly small, the upper cover is at a deflection risk, the sealing failure of the sealing element is easy to occur, the sealing performance of the battery pack is further easy to be poor, and the safety risk is caused.

In order to solve the above-mentioned problem, this embodiment provides a battery pack, and the battery pack includes battery, box, upper cover and sealing member, and the battery sets up in the box, and the upper cover sets up on the box, and sealing member presss from both sides and locates between box and the upper cover. That is, the sealing part in the embodiment is arranged at the sealing part between the box body and the upper cover, so that the battery pack in the embodiment can achieve good sealing effect of the battery pack while reducing the cost, the battery in the box body is prevented from being contacted with external substances, and potential safety hazards of the battery pack are avoided.

As shown in fig. 1, the present embodiment also provides a sealing member for sealing a battery pack, which has a simple structure, high material utilization, and low cost. It should be noted that the seal member of the present embodiment is not limited to use for sealing a battery, and may be applied to other sealing products, and is not particularly limited herein.

Specifically, the sealing member includes a main body portion 100, a plurality of grooves 11 and a plurality of protrusions 21 are disposed on the main body portion 100, the grooves 11 are symmetrically disposed on two sides of the main body portion 100 in a width direction, the plurality of grooves 11 are disposed at equal intervals along a length direction of the main body portion 100, the main body portion 100 where each set of two symmetrically disposed grooves 11 is a recess 10, and the recess 10 is made to be symmetrical along a central axis thereof, so that resilience force of the recess 10 to the upper cover in the width direction is consistent.

Further, the protrusions 21 are symmetrically disposed at two sides of the width direction of the main body 100, and the protrusions 21 are disposed at equal intervals along the length direction of the main body 100, and the shape of the protrusions 21 is the same as the shape of the grooves 11; the main body portion 100 where the two protrusions 21 of each set are symmetrically arranged is the protrusion 20, and the above structure makes the protrusion 20 be symmetrical along the center axis thereof, so that the resilience of the protrusion 20 to the upper cover in the width direction is uniform.

And, be equipped with a convex part 20 between two adjacent concave parts 10, be equipped with a concave part 10 between two adjacent convex parts 20, the center department of convex part 20 has seted up through-hole 30 for concave part 10 and convex part 20 are crisscross to be set up along the length direction of sealing member, and through-hole 30 locates the center of convex part 20, can guarantee good sealed effect.

In the above arrangement, the sealing member of the present embodiment is provided with the plurality of protrusions 20 and the grooves 11, and the through hole 30 is provided at the center of the protrusions 20, so that the use of materials is reduced as much as possible when the battery pack is sealed, the utilization rate of the materials is improved, and the cost is reduced. Meanwhile, the sealing elements are symmetrically arranged along the central axis of the sealing elements, so that the resilience force of the sealing elements to the upper cover in the width direction is consistent, and the deflection risk of the upper cover is solved. As shown in fig. 2, the shapes of the protrusions 21 and the grooves 11 are the same, so that when the sealing elements are manufactured, a plurality of sealing elements are arranged on the manufacturing substrate side by side, the protrusions 21 in any one sealing element can be connected with the grooves 11 of the other sealing element, the protrusions 21 and the grooves 11 are completely attached, the subsequent separate cutting of the sealing elements is avoided, the cutting times are reduced, and the cost is reduced.

Alternatively, the width of the protruding portion 20 is 20mm-25mm, which can satisfy the sealing of the existing battery pack structure, and ensure good sealing performance. Further alternatively, the width of the concave portion 10 is 12mm-17mm, so that the sealing of the existing battery pack can be satisfied, and the good sealing performance of the battery pack can be ensured.

As shown in fig. 2, in the present embodiment, the width of the protrusion 20 of the seal member is 25mm, the width of the recess 10 is 17mm, and the above arrangement is aimed at the seal member without the recess 10 (i.e. the seal member has a square structure with a width of 25 mm) which is common at present, and when 5 seal members with the same length and the same maximum width are manufactured, the seal member of the present embodiment can save 12.8% of material; the seal of this embodiment saves 4.3% of material when compared to the seal of the prior art when making 5 seals of the same length and maximum width. In addition, as the sealing element is an essential part in the assembly of the battery pack, the number of the sealing elements is increased when the battery pack is produced in a large batch, and as the production quantity of the sealing elements is improved, the more materials are saved in the production of the sealing elements, the more the material utilization rate of the sealing elements is higher than that of other structures, the lower the cost of the sealing elements is, and the cost of the battery pack in production is greatly reduced.

Preferably, the shortest distance between the hole wall of the through hole 30 and the protrusion 21 is greater than or equal to 6mm, so that after the box body and the upper cover of the battery pack pass through the through hole 30 through bolts for tightening and fixing, the sealing element can ensure the tightness of the battery pack, so that the sealing element meets the tightness requirement of the battery pack IP67, IP (Ingress ProtectionRating, which is a protection security level), the current general standard in the power battery industry is IP67,6 represents dust cannot enter the battery pack, 7 represents normal temperature and normal pressure, and no harmful effect is caused when the battery pack is temporarily soaked in 1M deep water.

Alternatively, the compression of the seal is 25% -50% and can meet the sealing requirements of the battery pack IP 67. Optionally, the material of the sealing member is silica gel foam. Preferably, the sealing element is made of HT800 silica gel foam, the sealing effect is better, the long-time sealing effect can be realized, and the service life is long.

It is understood that the material of the sealing member may be other materials having a sealing effect, which is not particularly limited herein. Moreover, the sealing effect of the sealing member can be adjusted by a technician through setting the width of the sealing member, adjusting the compression amount and replacing the material, and the technician can perform specific setting according to actual requirements without specific limitation.

In this embodiment, the main body 100 is provided with a plurality of main body parts 100, and the plurality of main body parts 100 are connected end to end. For large-scale structures similar to battery packs, a splicing mode is generally selected for manufacturing, and sealing elements meeting the size and the requirements of the battery packs can be manufactured by connecting a plurality of main body parts 100 end to end, so that the manufacturing cost of the sealing elements can be reduced by splicing.

With continued reference to fig. 1, specifically, two ends of each main body portion 100 along the length direction thereof are respectively provided with a first engagement portion 40 and a second engagement portion 50, the first engagement portion 40 and the second engagement portion 50 are in shape fit, and the first engagement portion 40 on one main body portion 100 can be in mortise-tenon connection with the second engagement portion 50 on the other main body portion 100, so that the splicing between the plurality of main body portions 100 can be realized. By connecting the first engagement portion 40 on any one of the two adjacent main body portions 100 to the second engagement portion 50, the splice between the two main body portions 100 can be achieved. Moreover, the appearance of the first linking part 40 is matched with the appearance of the second linking part 50, so that after the first linking part 40 and the second linking part 50 are matched, the width and the thickness of the joint between the first linking part 40 and the second linking part are the same as those of other positions of the sealing element, and the sealing effect can be met.

Alternatively, in the present embodiment, the first engaging portion 40 has a convex structure, and the second engaging portion 50 has a concave structure, so that the mortise-tenon connection between the first engaging portion 40 and the second engaging portion 50 can be achieved. It should be understood that, in other embodiments, the structures of the first engagement portion 40 and the second engagement portion 50 may be any mortise and tenon structure, so long as the mortise and tenon connection can be achieved, and the present utility model is not limited thereto.

In this embodiment, a glue layer is disposed on one side of the main body 100, so that the sealing member can be directly fixedly connected with the sealing portion of the box body through the glue layer, thereby facilitating assembly and use of the sealing member.

It is to be understood that the above examples of the present utility model are provided for clarity of illustration only and are not limiting of the embodiments of the present utility model. Various obvious changes, rearrangements and substitutions can be made by those skilled in the art without departing from the scope of the utility model. It is not necessary here nor is it exhaustive of all embodiments. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the utility model are desired to be protected by the following claims.

Claims

1. The sealing member is characterized in that the sealing member comprises a main body part (100), and the main body part (100) is provided with:

the grooves (11) are symmetrically arranged on two lateral sides of the width direction of the main body part (100), the grooves (11) are arranged at equal intervals along the length direction of the main body part (100), and the main body part (100) where each group of two symmetrically arranged grooves (11) is arranged is a concave part (10);

the protrusions (21) are symmetrically arranged on two lateral sides of the width direction of the main body part (100), the protrusions (21) are arranged at equal intervals along the length direction of the main body part (100), and the shape of the protrusions (21) is the same as that of the grooves (11); the main body part (100) where each group of two protrusions (21) are symmetrically arranged is a convex part (20); one convex part (20) is arranged between two adjacent concave parts (10), one concave part (10) is arranged between two adjacent convex parts (20), and a through hole (30) is formed in the center of each convex part (20).

2. A seal according to claim 1, wherein the width of the protrusion (20) is 20-25 mm.

3. A seal according to claim 2, characterized in that the recess (10) has a width of 12-17 mm.

4. A seal according to claim 1, characterized in that the shortest distance of the wall of the through hole (30) from the projection (21) is 6mm or more.

5. The seal of any of claims 1-4, wherein the seal has a compression of 25% -50%.

6. The seal of any one of claims 1-4, wherein the material of the seal is silicone foam.

7. A seal according to any one of claims 1-4, characterized in that the body part (100) is provided with several, several body parts (100) being connected end to end.

8. The sealing element according to claim 7, wherein each of the main body portions (100) is provided with a first engagement portion (40) and a second engagement portion (50) at both ends in a longitudinal direction thereof, the first engagement portion (40) and the second engagement portion (50) being adapted in shape, and the first engagement portion (40) on one of the main body portions (100) being capable of being mortise-tenon connected to the second engagement portion (50) on the other main body portion (100).

9. A seal according to any one of claims 1-4, characterized in that one side of the body part (100) is provided with a glue layer.

10. A battery pack, characterized in that the battery pack comprises a battery, a box body, an upper cover and a sealing element according to any one of claims 1-9, wherein the battery is arranged in the box body, the upper cover is arranged on the box body, and the sealing element is clamped between the box body and the upper cover.