CN219350478U - Battery pack - Google Patents

Abstract

The utility model relates to the technical field of batteries, and provides a battery pack, which comprises: the battery box body comprises a bottom support and a side protection, and the side protection is connected to the bottom support; the single battery is arranged in the battery box body; the buffer piece is arranged in the battery box body and is positioned between the single battery and the side protection; wherein, the inside of bolster is formed with the accommodation chamber that is used for holding the colloid. The bottom support has realized the support to battery cell and bolster, and the bolster is located between battery cell and the lateral part protection to can realize the buffer protection to battery cell, avoid the battery pack to cause the damage to battery cell in the use. And through being formed with the chamber that holds that is used for holding the colloid in the inside of bolster, on satisfying the cushioning capacity's of bolster effect that also can increase bolster intensity to can show the safe performance that promotes the battery package.

Description

Battery pack

Technical Field

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

Background

In the related art, the battery pack may include a plurality of batteries, and a plurality of batteries are disposed in a case of the battery pack, and the battery pack may shake during use, which may result in poor stability of the battery.

Disclosure of Invention

The utility model provides a battery pack to improve the performance of the battery pack.

The present utility model provides a battery pack, comprising:

the battery box body comprises a bottom support and a side protection, and the side protection is connected to the bottom support;

the single battery is arranged in the battery box body;

the buffer piece is arranged in the battery box body and is positioned between the single battery and the side protection;

wherein, the inside of bolster is formed with the accommodation chamber that is used for holding the colloid.

The battery pack comprises a battery box body, single batteries and a buffer piece, wherein the single batteries are arranged in the battery box body, and the buffer piece is arranged in the battery box body. The battery box body comprises a bottom support and a side protection connected to the bottom support, the bottom support supports the single battery and the buffer piece, and the buffer piece is located between the single battery and the side protection, so that the buffer protection of the single battery can be realized, and the damage to the single battery in the use process of the battery pack is avoided. And through being formed with the chamber that holds that is used for holding the colloid in the inside of bolster, on satisfying the cushioning capacity's of bolster effect that also can increase bolster intensity to can show the safe performance that promotes the battery package.

Drawings

For a better understanding of the present disclosure, reference may be made to the embodiments illustrated in the following drawings. The components in the drawings are not necessarily to scale and related elements may be omitted in order to emphasize and clearly illustrate the technical features of the present disclosure. In addition, the relevant elements or components may have different arrangements as known in the art. Furthermore, in the drawings, like reference numerals designate identical or similar parts throughout the several views.

Wherein:

fig. 1 is a partial schematic structure of a battery pack according to an exemplary embodiment;

fig. 2 is a schematic structural view illustrating a buffer of a battery pack according to an exemplary embodiment;

fig. 3 is a schematic cross-sectional structure of a buffer of a battery pack according to an exemplary embodiment.

The reference numerals are explained as follows:

10. a battery case; 11. a bottom support; 12. a side guard; 20. a single battery; 30. a buffer member; 31. a housing chamber; 32. an opening; 33. a recess; 40. and (5) colloid.

Detailed Description

The technical solutions in the exemplary embodiments of the present disclosure will be clearly and completely described below with reference to the accompanying drawings in the exemplary embodiments of the present disclosure. The example embodiments described herein are for illustrative purposes only and are not intended to limit the scope of the present disclosure, and it is therefore to be understood that various modifications and changes may be made to the example embodiments without departing from the scope of the present disclosure.

In the description of the present disclosure, 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 unless explicitly specified or limited otherwise; the term "plurality" refers to two or more than two; the term "and/or" includes any and all combinations of one or more of the associated listed items. In particular, references to "the/the" object or "an" object are likewise intended to mean one of a possible plurality of such objects.

Unless specified or indicated otherwise, the terms "connected," "fixed," and the like are to be construed broadly and are, for example, capable of being fixedly connected, detachably connected, or integrally connected, electrically connected, or signally connected; "coupled" may be directly coupled or indirectly coupled through intermediaries. The specific meaning of the terms in the present disclosure may be understood by those skilled in the art according to the specific circumstances.

Further, in the description of the present disclosure, it should be understood that the terms "upper", "lower", "inner", "outer", and the like, as described in the example embodiments of the present disclosure, are described with the angles shown in the drawings, and should not be construed as limiting the example embodiments of the present disclosure. It will also be understood that in the context of an element or feature being connected to another element(s) "upper," "lower," or "inner," "outer," it can be directly connected to the other element(s) "upper," "lower," or "inner," "outer," or indirectly connected to the other element(s) "upper," "lower," or "inner," "outer" via intervening elements.

An embodiment of the present utility model provides a battery pack, referring to fig. 1 to 3, the battery pack includes: a battery case 10, the battery case 10 including a bottom support 11 and a side guard 12, the side guard 12 being connected to the bottom support 11; the single battery 20, the single battery 20 is set up in the battery box 10; the buffer piece 30 is arranged in the battery box body 10 and is positioned between the single battery 20 and the side protection 12; wherein, the inside of the buffer 30 is formed with a receiving chamber 31 for receiving the gel 40.

The battery pack according to an embodiment of the utility model includes a battery case 10, a single battery 20, and a buffer member 30, wherein the single battery 20 is disposed in the battery case 10, and the buffer member 30 is disposed in the battery case 10. The battery box 10 comprises a bottom support 11 and a side protection 12 connected to the bottom support 11, the bottom support 11 supports the single battery 20 and the buffer piece 30, and the buffer piece 30 is located between the single battery 20 and the side protection 12, so that buffer protection of the single battery 20 can be realized, and damage to the single battery 20 in the use process of the battery pack is avoided. And through being formed with the accommodation chamber 31 that is used for holding colloid 40 in the inside of bolster 30, on the basis of satisfying bolster 30 buffer capacity, colloid 40 also can increase the effect of bolster 30 intensity to can show the safe performance that promotes the battery package.

It should be noted that, the battery case 10 includes a bottom support 11 and a side protection 12, the side protection 12 is connected to the bottom support 11, so that a space for accommodating the unit battery 20 may be formed, the side protection 12 may be a structure located at the outermost side of the bottom support 11, or the side protection 12 may be a structure located in the middle of the bottom support 11, for example, the side protection 12 encloses a large space at the outermost side of the bottom support 11, and other side protection 12 may be further disposed in the space, so that the space is divided into a plurality of subspaces, and the relevant arrangement manners of the bottom support 11 and the side protection 12 are not limited herein. The bottom support 11 may satisfy the support of the battery cells 20 and the buffer 30, and the side protection 12 may achieve the side protection of the battery cells 20 and the buffer 30.

The buffer member 30 is located between the single battery 20 and the side protection 12, and when the battery pack is used, for example, when the battery box 10 is impacted by the outside, the probability of impacting the single battery 20 can be relieved due to the buffer member 30, so that the risk of damaging the single battery 20 is reduced, or when the single battery 20 is expanded in the use process of the battery pack, the buffer member 30 can absorb the expansion space, thereby ensuring that the single battery 20 can be used normally and improving the safe use performance of the battery pack.

The inside of bolster 30 forms and holds cavity 31, holds cavity 31 and can regard as the buffer space, absorbs the impact force, and holds cavity 31 inside and hold colloid 40, and this colloid 40 can play the effect of strengthening bolster 30 structural strength to avoid bolster 30 when the cushioning effect, appear structural damage, improved the security performance of battery package to a certain extent. The accommodating chamber 31 accommodates the gel 40 therein, i.e., the battery pack may include the gel 40. The accommodating chamber 31 may be a rectangular cavity, or the accommodating chamber 31 may be a curved cavity or the like, which is not limited herein.

The accommodating chamber 31 of the buffer member 30 may be provided therein with a gel 40, the gel 40 may be a coagulation gel, for example, the gel 40 may be a structural gel, or the gel 40 may be a liquid gel, for example, the gel 40 may be a hydrophilic gel solution. The selection of the colloid 40 is not limited.

In one embodiment, the side guard 12 and the buffer 30 may be integrally formed, so that not only the forming efficiency of the side guard 12 and the buffer 30 may be improved, but also the structural strength of the side guard 12 and the buffer 30 may be ensured.

In one embodiment, the side guard 12 and the buffer 30 may be of a split type structure, and the side guard 12 and the buffer 30 may be independently installed during the installation of the battery pack, thereby accommodating the space requirement of the battery pack.

In one embodiment, the colloid 40 occupies 5% -50% of the volume of the accommodating chamber 31, so that the colloid 40 can be guaranteed to strengthen the structure of the buffer member 30, and excessive colloid 40 can be avoided, heat dissipation of the single battery 20 is not facilitated, and the buffer effect of the buffer member 30 can be affected, so that the safe use performance of the battery pack is effectively guaranteed.

The gel 40 may occupy 5%, 6%, 7%, 8%, 10%, 15%, 17%, 18%, 20%, 22%, 25%, 28%, 30%, 35%, 37%, 38%, 40%, 41%, 42%, 43%, 45%, 48%, 49% or 50% of the volume of the receiving chamber 31, etc.

In one embodiment, the height of the gel 40 occupies 5% -50% of the height of the accommodating chamber 31 in the direction perpendicular to the bottom support 11, so that the gel 40 is prevented from affecting the buffering performance of the buffering member 30 on the basis that the gel 40 can strengthen the structure of the buffering member 30, thereby improving the safety performance of the battery pack.

The height of the gel 40 may occupy 5%, 6%, 7%, 8%, 10%, 15%, 17%, 18%, 20%, 22%, 25%, 28%, 30%, 35%, 37%, 38%, 40%, 41%, 42%, 43%, 45%, 48%, 49% or 50% of the height of the receiving chamber 31, etc.

In one embodiment, along the direction perpendicular to the bottom support 11, the height of the buffer member 30 is smaller than the height of the single battery 20, so that the buffer member 30 can play a role in buffering, the buffer member 30 is prevented from being excessively large, the overall weight of the battery pack is increased, the energy density of the battery pack is not improved, the buffer member 30 is prevented from affecting the assembly of the battery pack, and the service performance of the battery pack is reliably improved to a certain extent.

In one embodiment, as shown in fig. 2, an opening 32 is disposed on a side of the buffer member 30 facing away from the bottom support 11, the opening 32 is communicated with the accommodating chamber 31, and the opening 32 can be used for injecting the gel 40, and can facilitate forming of the buffer member 30, so that forming efficiency of the battery pack can be improved to a certain extent.

The side of the cushioning member 30 facing away from the bottom support 11 is provided with an opening 32, i.e., the opening 32 may be located at the top of the cushioning member 30.

In one embodiment, the side of the buffer member 30 facing the bottom support 11 is provided with an opening 32, the opening 32 is communicated with the accommodating chamber 31, and the opening 32 not only can increase the buffering function of the buffer member 30, but also can be used for realizing the flow of the gel 40, for example, the gel 40 can enter the accommodating chamber 31 from the bottom of the buffer member 30, when the gel is injected into the battery pack, the gel 40 can flow into the accommodating chamber 31 from the opening 32, and the injected other gels mainly realize the fixation of the single battery 20.

In one embodiment, the side of the buffer member 30 facing the side protection 12 is provided with an opening 32, and/or the other side of the buffer member 30 facing the unit cell 20 is provided with an opening 32, where the opening 32 may be used to enable the gel 40 to enter into the accommodating chamber 31 of the buffer member 30 or overflow from the accommodating chamber 31, so as to avoid the gel 40 occupying an excessive height space, thereby reliably ensuring that the gel 40 reinforces the structure of the buffer member 30 and does not excessively affect the buffering function of the buffer member 30.

In one embodiment, the minimum thickness of the receiving chamber 31 is greater than the wall thickness of the buffer member 30 in a direction parallel to the bottom support 11, so that it is possible to ensure that the receiving chamber 31 can have a certain size, thereby ensuring that the buffer member 30 has a reliable buffering function and can be used to receive the gel 40.

In one embodiment, the accommodating chambers 31 are multiple, and the accommodating chambers 31 may be arranged at intervals along the length direction of the buffer member 30, that is, multiple reinforcing ribs may be arranged inside the buffer member 30, so that multiple accommodating chambers 31 are formed, not only the buffering function of the buffer member 30 can be ensured, but also the buffer member 30 can be ensured to have a certain structural strength.

The unit cell includes a cell and an electrolyte, and is a minimum unit capable of performing an electrochemical reaction such as charge/discharge. The battery cell refers to a unit formed by winding or laminating a stacked portion, wherein the stacked portion comprises a first pole piece, a separator and a second pole piece. When the first pole piece is a positive pole piece, the second pole piece is a negative pole piece. Wherein the polarities of the first pole piece and the second pole piece can be interchanged. The first and second pole pieces are coated with an active substance.

In one embodiment, the unit cell 20 may be a prismatic cell, that is, the unit cell 20 may be a quadrangular cell, where the quadrangular cell is mainly in a prismatic shape, but it is not strictly limited whether each side of the prism is a strictly defined straight line, and the corners between the sides are not necessarily right angles, and may be arc transitions.

The single batteries 20 can be laminated batteries, so that not only are the batteries convenient to group, but also the batteries with longer lengths can be obtained through processing. Specifically, the battery cell is a laminated battery cell, and the battery cell is provided with a first pole piece, a second pole piece opposite to the first pole piece and a diaphragm sheet arranged between the first pole piece and the second pole piece, which are mutually laminated, so that a plurality of pairs of the first pole piece and the second pole piece are stacked to form the laminated battery cell.

Alternatively, the unit cell 20 may be a wound cell, that is, a first electrode sheet, a second electrode sheet opposite to the first electrode sheet, and a separator sheet disposed between the first electrode sheet and the second electrode sheet are wound to obtain a wound cell.

In one embodiment, the battery cells 20 may be cylindrical batteries. The unit cell 20 may be a wound battery, i.e., a first electrode sheet, a second electrode sheet opposite to the first electrode sheet, and a separator sheet disposed between the first electrode sheet and the second electrode sheet are wound to obtain a wound battery cell.

In one embodiment, as shown in fig. 1 and 2, the unit cell 20 may be a cylindrical cell, and the buffer member 30 is formed with a recess 33 for accommodating the unit cell 20 on a side facing the unit cell 20, so that the space utilization of the battery pack can be improved, and effective limit of the unit cell 20 can be realized, thereby improving the stability of the unit cell 20.

The buffer member 30 is formed with a recess 33 for accommodating the single battery 20 toward one side of the single battery 20, and a part of the single battery 20 can be positioned in the recess 33, so that positioning of the single battery 20 is actually formed, assembly of the single battery 20 can be facilitated, and stability of the single battery 20 can be improved.

In one embodiment, the buffer members 30 are multiple, so that the protection of the single battery 20 can be reliably realized through the buffer members 30, and structural damage of the battery pack in the use process is avoided.

The single battery 20 may be plural, and plural single batteries 20 may be disposed in a large space, and at this time, plural buffer members 30 may form protection around the large space, or plural single batteries 20 may be disposed in plural subspaces, and plural buffer members 30 may form protection for plural subspaces, thereby effectively protecting the safety performance of the single battery 20.

In one embodiment, the side protection 12 is disposed around the bottom support 11 to form a rectangular cavity, and the plurality of buffering members 30 are disposed around the rectangular cavity, so that the structural safety performance of the plurality of unit batteries 20 can be effectively protected, and the safety service performance of the battery pack can be improved.

It should be noted that, the plurality of unit cells 20 may form a battery module, the unit cells 20 may be prismatic batteries, and the battery module may further include an end plate and a side plate, where the end plate and the side plate are used for fixing the plurality of unit cells 20. The unit cells 20 may be cylindrical cells, which may be disposed on a pallet, thereby forming a battery module.

The number of the single batteries 20 may be plural, and the plurality of single batteries 20 are disposed in the battery case 10. The plurality of unit batteries 20 may be mounted in the battery case 10 after forming a battery module. Alternatively, the plurality of unit cells 20 may be directly disposed in the battery case 10, that is, the plurality of unit cells 20 may be fixed by the battery case 10 without grouping the plurality of unit cells 20.

The battery compartment 10 may also include a cover plate, although in some embodiments the battery compartment 10 may not include a cover plate.

Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the utility model disclosed herein. This disclosure is intended to cover any variations, uses, or adaptations of the utility model following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains. The specification and example embodiments are to be considered exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.

It is to be understood that the present disclosure is not limited to the precise arrangements and instrumentalities shown in the drawings, and that various modifications and changes may be effected without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims (12)

1. A battery pack, comprising:

a battery box (10), the battery box (10) comprising a bottom support (11) and a side guard (12), the side guard (12) being connected to the bottom support (11);

a single battery (20), wherein the single battery (20) is arranged in the battery box body (10);

a buffer member (30), wherein the buffer member (30) is arranged in the battery box body (10) and is positioned between the single battery (20) and the side protection (12);

wherein, the buffer member (30) is internally formed with a containing chamber (31) for containing the colloid (40).

2. Battery pack according to claim 1, characterized in that the gel (40) occupies 5% to 50% of the volume of the containing chamber (31).

3. Battery pack according to claim 1, characterized in that the height of the gel (40) occupies 5-50% of the height of the containing chamber (31) in a direction perpendicular to the bottom support (11).

4. The battery pack according to claim 1, wherein the height of the buffer member (30) is smaller than the height of the unit cells (20) in a direction perpendicular to the bottom support (11);

wherein, the side of bolster (30) facing away from bottom support (11) is provided with opening (32), opening (32) with hold cavity (31) intercommunication.

5. The battery pack according to claim 1, wherein the side of the buffer (30) facing the bottom support (11) is provided with an opening (32).

6. Battery pack according to claim 1, characterized in that the buffer (30) is provided with an opening (32) towards one side of the side guard (12) and/or that the buffer (30) is provided with an opening (32) towards the other side of the battery cell (20).

7. Battery pack according to any one of claims 1 to 6, characterized in that the minimum thickness of the receiving chamber (31) is greater than the wall thickness of the buffer (30) in a direction parallel to the bottom support (11).

8. The battery pack according to any one of claims 1 to 6, wherein the unit cells (20) are cylindrical cells.

9. The battery pack according to claim 8, wherein a side of the buffer member (30) facing the unit cell (20) is formed with a recess (33) receiving the unit cell (20).

10. The battery pack according to any one of claims 1 to 6, wherein the buffer member (30) is plural.

11. The battery pack according to claim 10, wherein the side guard (12) is disposed around the bottom support (11) to surround a rectangular chamber, a plurality of the cushioning members (30) being disposed around the rectangular chamber.

12. The battery pack according to any one of claims 1 to 6, wherein the accommodating chambers (31) are plural.

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