CN218039593U - Battery device - Google Patents

Abstract

The utility model relates to a battery technology field provides a battery device, include: a battery case; the battery assembly is arranged in the battery box body and comprises a plurality of single batteries arranged along the stacking direction; the bus bar is connected with the at least two single batteries; the first end plate is arranged in the battery box body and is arranged at one end of the battery component along the stacking direction; the first buffer piece is arranged in the battery box body and is positioned between the first end plate and the battery component; the second buffer piece is arranged in the battery box body and is positioned between two adjacent single batteries; the compression amount of the first buffer member is larger than that of the second buffer member, so that the position change between the single batteries can be reduced to the greatest extent, the problem that the bus bar and the single batteries are invalid in connection is avoided, and the safety performance of the battery device can be improved.

Description

Battery device

Technical Field

The utility model relates to a battery technology field especially relates to a battery device.

Background

In the related art, when batteries are grouped, the batteries need to be subjected to overvoltage, so that the stability between adjacent batteries is ensured, but in the overvoltage process of the batteries, the problem of large battery movement amount may occur, so that the connection between a bus bar and the batteries is easily affected, and the problem of connection failure may occur under certain conditions.

SUMMERY OF THE UTILITY MODEL

The utility model provides a battery device to improve battery device's performance.

The utility model provides a battery device, include:

a battery case;

the battery assembly is arranged in the battery box body and comprises a plurality of single batteries arranged along the stacking direction;

the bus bar is connected with the at least two single batteries;

the first end plate is arranged in the battery box body and is arranged at one end of the battery component along the stacking direction;

the first buffer piece is arranged in the battery box body and is positioned between the first end plate and the battery component;

the second buffer piece is arranged in the battery box body and is positioned between two adjacent single batteries;

the compression amount of the first buffer member is larger than that of the second buffer member.

The utility model discloses battery device includes battery box, battery pack, busbar, first end plate, first bolster and second bolster, and battery pack, first end plate, first bolster and second bolster set up in the battery box, and two at least battery cells of battery pack are connected to the busbar. The compression amount of the first buffer member is larger than that of the second buffer member, so that when the battery assembly, the first end plate, the first buffer member and the second buffer member are pressed into the battery box body, the compression amount of the first buffer member is larger than that of the second buffer member, the position change between the single batteries can be reduced to the greatest extent, the problem of connection failure of the busbar and the single batteries is avoided, and the safety performance of the battery device can be improved.

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 be arranged differently as is known in the art. Further, in the drawings, like reference characters designate the same or similar parts throughout the several views. Wherein:

FIG. 1 is a schematic diagram of a battery device according to an exemplary embodiment;

FIG. 2 is a schematic diagram illustrating a partial structure of a battery device according to an exemplary embodiment;

FIG. 3 is a schematic illustration of a partial structure of a battery device according to an exemplary embodiment;

fig. 4 is a schematic diagram illustrating a cell fitting structure of a battery device according to an exemplary embodiment.

The reference numerals are explained below:

10. a battery case; 11. a base plate; 12. a structural beam; 20. a battery assembly; 21. a single battery; 211. a pole assembly; 212. recessing; 40. a bus bar; 50. a first end plate; 60. a first buffer member; 70. a second buffer member; 80. a second end plate.

Detailed Description

The technical solutions in the exemplary embodiments of the present disclosure will be clearly and completely described below with reference to the 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, unless otherwise explicitly specified or limited, the terms "first", "second", and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance; the term "plurality" means two or more; the term "and/or" includes any and all combinations of one or more of the associated listed items. In particular, references to "the" object or "an" object are also intended to mean one of possibly multiple such objects.

The terms "connected," "secured," and the like are to be construed broadly and unless otherwise stated or indicated, and for example, "connected" may be a fixed connection, a removable connection, an integral connection, an electrical connection, or a signal connection; "connected" may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in the present disclosure can be understood by those skilled in the art as the case may be.

Further, in the description of the present disclosure, it is to be understood that the directional words "upper", "lower", "inner", "outer", etc., which are described in the exemplary embodiments of the present disclosure, are described at the angles shown in the drawings, and should not be construed as limiting the exemplary embodiments of the present disclosure. It will also be understood that, in this context, when an element or feature is referred to as being "on", "under", or "inner", "outer" with respect to another element(s), it can be directly on "," under ", or" inner "," outer "with respect to the other element(s), or indirectly on", "under", or "inner", "outer" with respect to the other element(s) via intervening elements.

An embodiment of the present invention provides a battery device, please refer to fig. 1 to fig. 4, the battery device includes: a battery case 10; a battery assembly 20, the battery assembly 20 being disposed in the battery case 10, the battery assembly 20 including a plurality of unit cells 21 disposed in a stacking direction; a bus bar 40, the bus bar 40 connecting the at least two unit batteries 21; a first end plate 50, the first end plate 50 being disposed inside the battery case 10 and disposed at one end of the battery assembly 20 in the stacking direction; a first buffer member 60, the first buffer member 60 being disposed in the battery case 10 and between the first end plate 50 and the battery assembly 20; the second buffer piece 70 is arranged in the battery box body 10, and the second buffer piece 70 is positioned between two adjacent single batteries 21; the compression amount of the first cushion 60 is greater than that of the second cushion 70.

The utility model discloses a battery device of an embodiment includes battery box 10, battery pack 20, busbar 40, first bolster 50, first bolster 60 and second bolster 70, and battery pack 20, first bolster 50, first bolster 60 and second bolster 70 set up in battery box 10, and two at least battery cells 21 of battery pack 20 are connected to busbar 40. By making the compression amount of the first buffer member 60 greater than that of the second buffer member 70, when the battery assembly 20, the first end plate 50, the first buffer member 60, and the second buffer member 70 are pressed into the battery case 10, the compression amount of the first buffer member 60 can be made greater than that of the second buffer member 70, so that the positional variation between the single batteries 21 can be reduced to the greatest extent, the problem of connection failure between the bus bar 40 and the single batteries 21 can be avoided, and the safety performance of the battery device can be improved.

It should be noted that, the first cushion member 60 is disposed between the first end plate 50 and the battery assembly 20, and the second cushion member 70 is disposed between two adjacent single batteries 21 of the battery assembly 20, so that when the battery assembly 20, the first end plate 50, the first cushion member 60, and the second cushion member 70 are pressed into the battery box 10, the first cushion member 60 can have a larger compression amount, and therefore, the second cushion member 70 between two adjacent single batteries 21 can have a relatively smaller compression amount, so as to ensure that the positional relationship between the single batteries 21 is substantially consistent, and the problem of connection failure at the connection position between the busbar 40 and the single battery 21 can be avoided. For example, if the position of the bus bar 40 is changed from one cell 21 to another, the welding between the bus bar 40 and the cell 21 may be failed, thereby affecting the normal use of the battery device.

The material of the first buffer 60 may be selected from rubber, polyurethane plastic, polyphenyl foam plastic, etc. The material of the second buffer member 70 may be selected from rubber, polyurethane plastic, polyphenyl foam plastic, etc. The materials selected for the first cushioning member 60 and the second cushioning member 70 may include subdivided materials having different compression amounts, thereby ensuring that the compression amount of the first cushioning member 60 is greater than that of the second cushioning member 70.

In one embodiment, the thickness of the first buffer member 60 is consistent with that of the second buffer member 70, so that the compression amount of the first buffer member 60 is greater than that of the second buffer member 70 under the same pressure, and in the battery grouping process, the first buffer member 60 and the second buffer member 70 can be compressed, so that the buffering performance between the single batteries 21 is improved, and the position change of the single batteries 21 can be avoided, so that the connection stability between the bus bar 40 and the single batteries 21 is improved.

The first cushion member 60 has a hardness less than that of the second cushion member 70, so that the first cushion member 60 is compressed more than the second cushion member 70 at the same pressure.

In one embodiment, the thickness of the first cushioning member 60 is greater than that of the second cushioning member 70, so that the compression amount of the first cushioning member 60 is greater than that of the second cushioning member 70 under the same pressure, thereby ensuring that the first cushioning member 60 and the second cushioning member 70 can provide reliable cushioning, and enabling the first cushioning member 60 to avoid position change between the single batteries 21, so as to improve the safety performance of the battery device.

The first buffering member 60 and the second buffering member 70 are made of the same material, and the thickness of the first buffering member 60 is greater than that of the second buffering member 70, so that the first buffering member 60 can be compressed by a larger amount, thereby preventing the position change between the single batteries 21 and improving the connection stability between the bus bar 40 and the single batteries 21.

In one embodiment, the first buffer member 60 is a first thermal insulation cushion, and the second buffer member 70 is a second thermal insulation cushion, so that heat transfer between adjacent unit batteries 21 can be avoided, and the first buffer member 60 and the second buffer member 70 can provide a sufficient amount of buffer for the battery assembly 20. The first buffer 60 may be silicone rubber, and the second buffer 70 may be silicone rubber.

In one embodiment, as shown in fig. 4, the single battery 21 is provided with a pole assembly 211, and the bus bar 40 is welded to the pole assembly 211, so as to ensure reliable connection stability between the bus bar 40 and the pole assembly 211. And the compression amount of the first buffer member 60 is greater than that of the second buffer member 70, so that when the batteries are grouped, the second buffer member 70 between the single batteries 21 can be prevented from being compressed in a large amount, so that the positions between the single batteries 21 are basically kept consistent, the connection between the bus bar 40 and the pole assembly 211 can be prevented from being damaged, and the problem of connection failure is avoided.

In one embodiment, the second buffer member 70 contacts with the large surface of the single battery 21, and the stacking direction is perpendicular to the large surface of the single battery 21, that is, the large surfaces between adjacent single batteries 21 are disposed oppositely, so that the stacking stability of the single batteries 21 is better, the battery grouping efficiency can be improved, and the utilization rate of the internal space of the battery box 10 is improved.

It should be noted that the stacking direction of the single cell 21 may be considered as the arrangement direction of the plurality of single cells 21, and may be considered as the arrangement direction of the plurality of single cells 21 from left to right or the arrangement direction of the plurality of single cells 21 from right to left as shown in fig. 2 and fig. 3. And the unit cell 21 may have two opposite large surfaces and four small surfaces disposed around the large surfaces, the large surfaces having an area larger than that of the small surfaces.

In one embodiment, the number of the second buffering members 70 is plural, which not only can increase a reliable buffering amount for the single batteries 21, thereby ensuring the safety performance of the battery assembly 20.

In one embodiment, the second buffer member 70 may be disposed between any two adjacent unit cells 21, or the second buffer member 70 may be disposed between only some adjacent unit cells 21 in the plurality of unit cells 21. The first cushion member 60 may be provided between the first end plate 50 and the unit cell 21, or the first cushion member 60 may not be provided between the first end plate 50 and the unit cell 21, i.e., the first end plate 50 and the unit cell 21 may be in direct contact.

In one embodiment, as shown in fig. 2 and 3, the battery device further includes a second end plate 80, the second end plate 80 is disposed in the battery box 10 and located at the other end of the battery assembly 20, so that the battery assembly 20 is located between the first end plate 50 and the second end plate 80, that is, the fixing of the plurality of unit batteries 21 is achieved through the first end plate 50 and the second end plate 80, and the first end plate 50 and the second end plate 80 form a protection function for the unit batteries 21 and can effectively clamp the plurality of unit batteries 21.

In one embodiment, the side of the second end plate 80 facing the battery assembly 20 is in contact with the other first buffer member 60, that is, the second end plate 80 and the other first buffer member 60 of the battery assembly 20 can also be compressed, so that the buffer amount of the battery assembly 20 can be further provided, and the position change between the adjacent single batteries 21 can be further avoided, thereby improving the safety performance of the battery device.

In one embodiment, as shown in fig. 2 and 3, the battery case 10 includes: a base plate 11; the structural beam 12, the structural beam 12 is arranged on the bottom plate 11, and two opposite sides of the first end plate 50 are respectively contacted with the first buffer member 60 and the structural beam 12; the bottom plate 11 comprises a heat exchange channel, so that the bottom plate 11 can be used for realizing heat dissipation of the single battery 21, and the safety performance of the battery device is ensured.

The structural beam 12 may be a plurality of structural beams 12, and a plurality of structural beams 12 may surround to form a frame, and the frame may surround the bottom plate 11 to form a circumferentially closed space, so as to dispose the battery assembly 20 in the space. The structural beams 12 may also be provided as dividing beams inside the frame, for example, to divide the space into a plurality of sub-spaces, which may be used to house structures such as battery assemblies 20 or electrical components.

It should be noted that the frame is disposed around the bottom plate 11 without specific reference, and it is emphasized that the frame forms a circumferentially closed space. The frame is connected to the bottom plate 11, and the frame may be disposed on the bottom plate 11, or the frame may be connected to a circumferential edge of the bottom plate 11, which is not limited herein. The battery box body also comprises a box body top cover which is connected with the frame and is arranged opposite to the bottom plate 11, so that the battery box body can form a closed space.

The structural beam 12 may be a beam, or the structural beam 12 may also be a plate, which is not limited herein, and the single batteries 21 may be sequentially placed in the battery box 10, and when the first end plate 50 is placed, a pre-load may be formed, so as to press the first buffer 60.

In one embodiment, the single battery 21 may have a flange structure, and the bottom plate 11 may have a recessed structure, and the flange structure and the recessed structure cooperate with each other, so as to ensure that the single battery 21 is stably disposed in the battery box 10, which not only facilitates assembly and positioning, improves assembly efficiency, but also ensures assembly consistency.

In one embodiment, as shown in fig. 4, two adjacent single batteries 21 are each provided with a pole assembly 211, and the single battery 21 is provided with a recess 212. A plurality of battery cells 21 pile up in proper order, and the direction of piling up of a plurality of battery cells 21 is perpendicular to battery cell 21's big surface, and utmost point post subassembly 211 sets up in battery cell 21's big surface to this makes utmost point post subassembly 211 have sufficient bearing surface, thereby improves utmost point post subassembly 211's connection stability.

Be equipped with sunken 212 on the big surface of battery, sunken 212 sets up with adjacent battery cell 21's utmost point post subassembly 211 relatively to this makes, sunken 212 can be used for dodging adjacent cell 21's utmost point post subassembly 211, thereby can improve the space utilization of group battery.

The unit cell 21 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 stack including a first electrode, a separator, and a second electrode. When the first electrode is a positive electrode, the second electrode is a negative electrode. Wherein the polarities of the first and second electrodes may be interchanged.

The single battery is a laminated battery, which is convenient to pack and can be processed to obtain a battery with longer length.

Specifically, electric core is lamination formula electric core, and electric core has first pole piece that stacks up each other, with first pole piece opposite electric property's second pole piece and the diaphragm of setting between first pole piece and second pole piece to make many to pile up and form lamination formula electric core to first pole piece and second pole piece.

Optionally, the single battery may be a winding battery, that is, a first pole piece, a second pole piece opposite to the first pole piece in electrical property, and a diaphragm sheet disposed between the first pole piece and the second pole piece are wound to obtain a winding battery core.

Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the invention disclosed herein. This disclosure is intended to cover any variations, uses, or adaptations of the invention 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. It is intended that the specification and example embodiments be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.

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

Claims (11)

1. A battery device, comprising:

a battery case (10);

a battery assembly (20), the battery assembly (20) being disposed within the battery case (10), the battery assembly (20) including a plurality of unit batteries (21) disposed in a stacking direction;

a busbar (40), the busbar (40) connecting at least two of the cells (21);

a first end plate (50), the first end plate (50) being disposed within the battery case (10) and at one end of the battery assembly (20) in the stacking direction;

a first cushion member (60), wherein the first cushion member (60) is arranged in the battery box body (10) and is positioned between the first end plate (50) and the battery assembly (20);

the second buffer piece (70) is arranged in the battery box body (10) and is positioned between two adjacent single batteries (21);

wherein the compression amount of the first cushion member (60) is greater than the compression amount of the second cushion member (70).

2. The battery device according to claim 1, wherein the second buffer member (70) is in contact with a large surface of the unit cell (21), and the stacking direction is perpendicular to the large surface of the unit cell (21).

3. The battery device according to claim 1, wherein the thickness of the first buffer member (60) corresponds to the thickness of the second buffer member (70).

4. The battery device according to claim 1, wherein the first buffer member (60) has a thickness greater than a thickness of the second buffer member (70).

5. The battery device according to claim 4, wherein the first buffer member (60) and the second buffer member (70) are made of the same material.

6. The battery device according to any one of claims 1 to 5, wherein a pole assembly (211) is arranged on the single battery (21), and the bus bar (40) is welded with the pole assembly (211).

7. The battery device according to any one of claims 1 to 5, further comprising a second end plate (80), the second end plate (80) being disposed within the battery case (10) and at the other end of the battery assembly (20) such that the battery assembly (20) is located between the first end plate (50) and the second end plate (80).

8. The battery device according to claim 7, wherein the second end plate (80) is in contact with the other first buffer member (60) on a side facing the battery assembly (20).

9. The battery device according to any one of claims 1 to 5, wherein the battery case (10) includes:

a base plate (11);

a structural beam (12), the structural beam (12) set up in bottom plate (11), the relative both sides of first end plate (50) respectively with first bolster (60) with structural beam (12) contact.

10. The battery device according to any one of claims 1 to 5, wherein the second buffer member (70) is plural.

11. The battery device according to any one of claims 1 to 5, wherein the first buffer member (60) is a first thermal insulation cushion and the second buffer member (70) is a second thermal insulation cushion.

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