CN219123364U - Battery device - Google Patents

Abstract

The utility model discloses a battery device, which comprises at least two batteries, two battery fixing pieces and a heat exchange plate, wherein the heat exchange plate comprises a heat exchange area and a buffer area; at least two batteries are arranged in a first direction and are positioned between the two battery fixing pieces; the battery has a first side and a second side distributed in a first direction; a heat exchange plate is arranged between two adjacent batteries; the heat exchange area of the heat exchange plate is attached to the first side of the battery; the buffer area of the heat exchange plate is attached to the second side of the battery; taking two batteries at the outermost layers at two sides of the first direction as a first battery and a second battery; the first side of the first battery is attached to one of the battery fixing pieces; a cushion is sandwiched between the second side of the second battery and the other battery mount. The buffer cushion is arranged between the battery and the battery fixing piece at the outermost side of the battery pack, so that deformation of the heat exchange plate in the using process can be relieved.

Description

Battery device

Technical Field

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

Background

At present, with the development of new energy automobile industry, the requirement of consumers on quick charging of power batteries is gradually increased. However, the power battery expands in the charge and discharge process, the expansion degree of the power battery directly influences the cycle life of the battery, and a common method for radiating heat of the battery pack is to arrange a heat exchange plate between the single batteries of the battery pack, if the battery expands, the heat exchange plate is extruded, so that the heat exchange plate deforms, an internal flow channel of the heat exchange plate becomes narrow after deformation, fluid flow is blocked, and the heat radiation performance is influenced.

It is common practice to provide a buffer zone in the heat exchange plate for reducing the expansion force of the battery, but in such a structure, since the heat exchange plate is disposed between two adjacent batteries distributed in the battery device and between the outermost battery and the battery fixing member (such as a beam body or an end plate structure of the battery box body), the buffer zone of the heat exchange plate between the outermost battery and the battery fixing member has an insignificant heat transfer effect, occupies the internal space of the battery, and has a high cost.

Disclosure of Invention

In order to overcome the defects in the prior art, the utility model aims to provide a battery device, wherein a buffer pad is arranged between a battery positioned at the outermost side of a battery pack and a battery fixing piece, so that the occupied space can be reduced, and the force applied to the battery by the battery fixing piece can be relieved.

The utility model adopts the following technical scheme:

a battery device comprises at least two batteries, two battery fixing pieces and a heat exchange plate, wherein the heat exchange plate comprises a heat exchange area and a buffer area which are distributed in a first direction; the heat exchange area is provided with a heat exchange cavity for exchanging heat through a heat exchange medium; the buffer area is provided with a buffer cavity for absorbing the stress of the heat exchange plate through deformation so as to buffer the stress of the heat exchange plate;

at least two batteries are arranged in the first direction and are positioned between the two battery fixing pieces; the battery has a first side and a second side distributed in the first direction; the heat exchange plate is arranged between two adjacent batteries; the heat exchange area of the heat exchange plate is attached to the first side of the battery; the buffer area of the heat exchange plate is attached to the second side of the battery; taking two batteries at the outermost layers at two sides of the first direction as a first battery and a second battery; the first side of the first battery is attached to one of the battery fixing pieces; a cushion is sandwiched between the second side of the second battery and the other of the battery mounts.

Compared with the prior art, the utility model has the beneficial effects that:

1. through directly setting up the blotter structure between the second side of second battery and battery mounting, can reduce the space because of the assembly of heat exchanger plate brings, reduce the volume of group battery. In addition, the buffer pad can directly slow down the atress between battery mounting and the second battery, absorbs battery expansion force, absorbs the tolerance during the assembly, and the buffer pad replaces the heat exchange plate can reduce cost.

2. The buffer pad structure is arranged between the second side of the second battery positioned at the outermost layer and the battery fixing piece, so that space brought by assembly of the heat exchange plate can be reduced, the volume of the battery pack is reduced, heat of the second battery positioned at the outermost layer of the side is not easy to take away, and the heat balance of the battery pack is maintained.

Drawings

Fig. 1 is a schematic structural view of a heat exchange plate according to the present utility model;

FIG. 2 is a schematic view of a partial enlarged structure in FIG. 1;

fig. 3 is a schematic view of the structure of the battery pack of the present utility model.

In the figure: 10. a heat exchange plate; 11. a heat exchange area; 111. a heat exchange cavity; 112. a first separator; 12. a buffer area; 121. a buffer cavity; 122. a second separator; 20. a battery; 21. a first battery; 22. a second battery; 23. a first side of the battery; 24. a second side of the battery; 30. a cushion pad; 40. a heat insulating mat; 50. and a battery fixing member.

Detailed Description

The utility model will be further described with reference to the accompanying drawings and detailed description below:

in the description of the present utility model, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, merely to facilitate description of the present utility model and simplify the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs. The terminology used herein in the description of the utility model is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model.

In the case of example 1,

as shown in fig. 1, 2 and 3, the battery device in this embodiment is illustrated as a battery pack, and includes at least two batteries 20, two battery fixing members 50 and a heat exchange plate 10, wherein the heat exchange plate 10 includes a heat exchange area 11 and a buffer area 12 distributed in a first direction, a heat exchange cavity 111 is disposed in the heat exchange area 11, and a buffer cavity 121 is disposed in the buffer area 12. The at least two batteries 20 are arranged in a first direction, that is, the first direction is the arrangement direction of the batteries, and the at least two batteries 20 are arranged between the two battery holders 50.

Since at least two cells 20 are sequentially arranged in the first direction, it is possible to define two cells 20 of the outermost layer on both sides of the first direction as a first cell 21 and a second cell 22, respectively. After the assembled battery, at least two cells 20 of the assembled battery are distributed between the two cell holders 50, and a first cell 21 located at the outermost layer on one side in the first direction may correspond to one of the cell holders 50, and a second cell 22 located at the outermost layer on the other side in the first direction may correspond to the other cell holder 50.

The specific above-mentioned battery 20 may have a first side and a second side, and after assembly, a heat exchange plate 10 may be disposed between two adjacent batteries 20, so that the heat exchange area 11 of the heat exchange plate 10 is attached to the second side 23 of the battery; the buffer zone 12 of the heat exchanger plate 10 is attached to the second side 24 of the battery. In addition, the first side of the first battery 21 may be attached to one of the battery holders 50, and it should be noted that the attachment of the first side of the first battery to the battery holder may be direct attachment or indirect attachment, and the cushion 30 is sandwiched between the second side of the second battery 22 and the other battery holder 50.

In this embodiment, the heat exchange cavity may be used to introduce a heat exchange medium, to perform liquid cooling or liquid heating on the battery, and to perform heat exchange with the battery. The buffer cavity can absorb the stress of the heat exchange plate through self deformation so as to slow down the whole stress of the heat exchange plate.

In the following embodiments, a liquid cooling heat exchange medium is introduced into the heat exchange cavity to take away heat generated in the working process of the battery.

On the basis of the above structure, when the battery pack is in use, as at least two batteries 20 are sequentially arranged in the first direction, and the heat exchange plate 10 is arranged between two adjacent batteries 20, the heat exchange plate 10 can be extruded by extrusion force generated by cyclic expansion if the cyclic expansion occurs in the use process of the batteries 20. In this application, after assembly, the heat exchange area 11 of the heat exchange plate 10 may be attached to the second side 23 of the battery, the buffer area 12 of the heat exchange plate 10 may be attached to the second side 24 of an adjacent battery, and when in operation, the heat exchange cavity 111 in the heat exchange area 11 of the heat exchange plate 10 may introduce a heat exchange medium to drive the battery 20 to work to generate heat, so as to reduce the cyclic expansion, i.e. the heat exchange area 11 of the heat exchange plate 10 may take away the heat of the second side 23 of the battery; the buffer cavity 121 of the buffer area 12 of the heat exchange plate 10 is not introduced with heat exchange medium, and the buffer cavity 121 adopts a cavity structure, so that the buffer cavity 121 attached to the heat exchange plate 10 can be extruded when the battery 20 is circularly expanded, the buffer cavity 121 structure can buffer expansion force from the second side of the adjacent battery 20, the two sides of the heat exchange plate 10 are prevented from being expanded by the battery 20 and subjected to larger extrusion force, deformation in the heat exchange area 11 of the heat exchange plate 10 is slowed down, the deformation of the heat exchange area 11 is small, the flow of cooling liquid is smoother, and the heat exchange effect is better.

Because the heat exchange plates 10 are arranged between every two adjacent batteries 20, the heat exchange area 11 of each heat exchange plate 10 can be attached to the second side 23 of the battery to exchange heat, the cyclic expansion condition of the second side 23 of the battery is reduced, and the buffer area 12 of each heat exchange plate 10 can be attached to the second side 24 of the battery to directly buffer the extrusion force applied to the heat exchange plate 10 by the cyclic expansion of the second side of the battery 20, so that the batteries 20 are distributed in the first direction, the first side exchanges heat through the heat exchange area 11 of the heat exchange plate 10, and the second side is buffered through the buffer area 12 of the heat exchange plate 10, namely, a single-side heat exchange mode is adopted, and the heat uniformity of the battery pack is ensured.

On the basis of the arrangement, the first battery 21 and the second battery 22 which are positioned on the outermost layers on the two sides of the battery pack in the first direction are respectively arranged corresponding to the battery fixing piece 50, under the condition that the arrangement structures of the battery 20 and the heat exchange plate 10 are the same, the first side of the first battery 21 faces the battery fixing piece 50, the second side of the second battery 22 faces the battery fixing piece 50, if the heat exchange plate 10 is clamped between the battery 20 and the battery fixing piece 50 on the outermost layer, the heat exchange area 11 of the heat exchange plate 10 between the first battery 21 and the battery fixing piece 50 can exchange heat on the first side of the first battery 21, the buffer area 12 of the heat exchange plate 10 is attached to the battery fixing piece 50, at the moment, the buffer area 12 of the heat exchange plate 10 can buffer the extrusion force from the battery fixing piece 50, deformation quantity of the heat exchange plate 10 is slowed down, and the heat exchange area 11 of the heat exchange plate 10 can exchange heat on the first side of the first battery 21.

The second battery 22 located on the outermost layer of the other side of the battery pack is the second side corresponding battery fixing member 50, if the replacement hot plate 10 is disposed between the second side of the second battery 22 and the battery fixing member 50, the buffer zone 12 of the heat exchange plate 10 is attached to the second side of the second battery 22, the heat exchange zone 11 of the heat exchange plate 10 is attached to the battery fixing member 50, and when the battery fixing member 50 is generally not required to exchange heat, the heat exchange plate 10 disposed between the second side of the second battery 22 and the battery fixing member 50 basically does not perform the heat exchange function, so that the resource waste and the heat balance of the battery pack are insufficient, and the heat exchange of the second battery 22 can be performed by the heat exchange zone 11 of the heat exchange plate 10 disposed on the first side of the second battery 22. In addition, the cushion pad 30 can directly relieve the stress between the battery fixing member 50 and the second battery 22, absorb the expansion force of the battery 20, absorb the tolerance during assembly, and replace the heat exchange plate with the cushion pad 30 can reduce the cost.

However, if the heat exchange plate 10 is provided between the first side of the first battery 21 and the battery holder 50, the heat exchange plate 10 can remove heat, and thus the heat can be transferred to the battery holder 50 through the buffer 12. The buffer pad 30 disposed between the second side of the second battery 22 and the battery fixing member 50 plays a role in buffering, and the difference in heat exchange structure between the two sides of the battery pack and the battery fixing member 50 may result in a situation that the heat at the two sides of the battery 20 is high at one side and low at the other side, which results in unbalanced heat in the middle, so in this application, the buffer pad 30 may be disposed between the second battery 22 and the battery fixing member 50 without the heat exchange plate 10 disposed between the first battery 21 and the battery fixing member 50.

It should be noted that, the above-mentioned battery fixing member may be selected to be a beam or an end plate structure, and specifically, when the battery device is a battery pack, two ends of a plurality of batteries of the battery pack may be fixed by two beam bodies. Of course, in order to relatively equalize the heat of the battery pack at both sides in the first direction on the basis of the structure in which the heat exchange plate 10 is provided between the first side of the first battery 21 and the battery holder 50, a heat insulation pad 40 may be provided on the heat exchange plate 10 between the first side of the first battery 21 and the battery holder 50, the heat insulation pad 40 being interposed between the buffer zone 12 of the heat exchange plate 10 and the battery holder 50, the heat insulation pad 40 being capable of slowing down the heat transfer between the buffer zone 12 of the heat exchange plate 10 and the battery holder 50, and the heat transfer at both sides being relatively equalized by the buffer pad 30 between the second side of the second battery 22 and the battery holder 50.

More specifically, the cushion pad 30 has a heat insulation portion, the heat insulation portion is attached to the second side of the second battery 22, and the heat insulation portion can be realized by selecting a heat insulation pad 40 attached to the cushion pad 30, or can be realized by directly selecting a heat insulation material to make the cushion pad 30, so that heat insulation is performed while buffering is realized, and heat transfer between two sides of the battery pack and the battery fixing member 50 is more balanced.

Further, the heat exchange area 11 is provided with a plurality of heat exchange cavities 111, and the buffer area 12 is internally provided with a plurality of buffer cavities 121; the heat exchange cavities 111 and the heat exchange cavities 111 are arranged in a second direction; the second direction is perpendicular to the first direction. In this embodiment, heat dissipation is described by taking the case of introducing a cooling medium into the heat exchange cavity 111.

When the normal battery 20 is used, a large amount of heat is generated in the battery pack, so that the battery 20 needs to be radiated, the heat exchange area 11 of the heat exchange plate 10 is filled with cooling liquid, and when the cooling liquid flows in the heat exchange area 11, the cooling liquid can bring the heat generated by the battery 20 attached to the cooling liquid, so that the battery pack in use can be cooled, the thermal runaway phenomenon of the battery pack caused by overheat is reduced, and the use is safer.

However, since the heat exchange cavity 111 of the heat exchange plate 10 is filled with the cooling liquid, the heat exchange area 11 of the heat exchange plate 10 may not have sufficient strength due to the structure of the heat exchange cavity 111, and the heat exchange plate 10 is disposed between the batteries 20, the batteries 20 are easy to expand due to heat generated by themselves during use, or vibrate due to external force, so that the batteries 20 squeeze the heat exchange area 11 of the heat exchange plate 10 attached to the batteries, and deform easily after the heat exchange area 11 is pressurized, so that the flow of the cooling liquid in the heat exchange cavity 111 is blocked, and the heat dissipation effect is affected.

So in this application, can be in the heat transfer district 11 of above-mentioned heat transfer board 10 through setting up at least one first baffle 112, separate heat transfer district 11 and form two at least heat transfer cavity 111, on the one hand, the coolant liquid can disperse and cool off through the leading-in of two at least heat transfer cavity 111, the cooling effect is more even, at least one first baffle 112 that on the other hand set up can form the enhancement effect in the inside of heat transfer district 11, reduce the deformation of heat transfer district 11, heat transfer district 11 deflection is little, the coolant liquid flows more smoothly, the heat transfer effect is better.

In addition, a buffer zone 12 is further arranged at the side part of the heat exchange zone 11, the buffer zone 12 is attached to one of the two adjacent batteries 20, no cooling liquid is introduced into the buffer zone 12, and a buffer cavity 121 is formed through at least one second partition plate 122, when the single battery 20 circularly expands and presses the buffer zone 12, the buffer cavity 121 of the buffer zone 12 is compressed to buffer the acting force directly applied to the heat exchange zone 11, and likewise, the at least one second partition plate 122 can form a reinforcing structure for the buffer zone 12, so that the expansion extrusion force of the battery 20 at the side of the heat exchange plate 10 is buffered, the expansion extrusion force of the battery 20 is avoided, the expansion of the battery 20 at the two sides of the heat exchange plate 10 is avoided, the larger extrusion force is applied to the two sides of the heat exchange plate 10, the deformation amount in the heat exchange zone 11 of the heat exchange plate 10 is slowed down, the deformation amount of the heat exchange zone 11 is small, the cooling liquid flows more smoothly, and the heat exchange effect is better.

It should be noted that, the second partition plate 122 is obliquely disposed, and the obliquely disposed second partition plate 122 can decompose the force applied by the battery 20 along the first direction into two forces in the first direction and the second direction, so that the expansion force of the battery 20 in the first direction can be effectively reduced, the heat exchange area 11 of the heat exchange plate 10 is less prone to deformation, the buffering effect is better, and further, the situation that the heat resistance is increased due to severe deformation of the heat exchange area 11 is avoided, and the cooling effect is improved.

Of course, the heat exchange refers to the cooling and heat dissipation of the battery by introducing the cooling liquid into the heat exchange cavity, and in other cases, when the battery pack is applied to an environment with a relatively low temperature, the battery is easy to run out due to the relatively low use environment temperature, so that the working efficiency of the battery is low. Therefore, the heat fluid can be introduced into the heat exchange cavity of the heat exchange area for heating the battery, the battery can work at normal temperature, and the working efficiency is higher. And the heat exchange medium can be gas or liquid in the prior art, such as water and glycol.

In the case of example 2,

unlike embodiment 1, the battery device in this embodiment is a battery pack including the battery pack of embodiment 1 and a battery case in which the battery pack is mounted, and when assembled, two battery fixing members and at least two batteries 20 distributed between the two battery fixing members 50 are all assembled in the battery case, and on the basis of this structure, the battery fixing members may be side rails in the battery case or partition rails for partitioning the battery pack, while the battery pack employing the battery pack of embodiment 1 has the same technical effects as those of embodiment 1 described above, and detailed descriptions thereof will be omitted herein.

In addition, the battery pack is assembled to the battery box body, and the battery on the outermost layer of the battery pack can be fixed by two end plates or two side plates of the battery box body, and on the basis of the structure, the battery fixing piece is an end plate or a side plate.

It will be apparent to those skilled in the art from this disclosure that various other changes and modifications can be made which are within the scope of the utility model as defined in the appended claims.

Claims (9)

1. A battery device, characterized by comprising at least two batteries (20), two battery holders (50) and a heat exchanger plate (10), the heat exchanger plate (10) comprising a heat exchanger zone (11) and a buffer zone (12) distributed in a first direction; the heat exchange area (11) is provided with a heat exchange cavity (111) for exchanging heat through a heat exchange medium; the buffer zone (12) is provided with a buffer cavity (121) for absorbing the stress of the heat exchange plate through deformation so as to buffer the stress of the heat exchange plate;

at least two cells (20) arranged in the first direction and located between two cell holders (50); the battery (20) has a first side (23) and a second side (24) distributed in the first direction; the heat exchange plate (10) is arranged between two adjacent batteries (20); the heat exchange area (11) of the heat exchange plate (10) is attached to the first side of the battery (20); the buffer area (12) of the heat exchange plate (10) is attached to the second side of the battery (20); taking two batteries (20) at the two outermost layers on the two sides of the first direction as a first battery (21) and a second battery (22); a first side of the first battery (21) is attached to one of the battery holders (50); a cushion (30) is sandwiched between a second side of the second battery (22) and the other battery mount (50).

2. The battery device according to claim 1, characterized in that the heat exchanger plate (10) is arranged between the first side of the first battery (21) and the battery holder (50); the heat exchange area (11) of the heat exchange plate (10) is attached to the first side of the first battery (21); the buffer area (12) of the heat exchange plate (10) is attached to the battery fixing piece (50).

3. Battery device according to claim 2, characterized in that a heat insulating pad (40) is arranged between the buffer zone (12) of the heat exchanger plate (10) and the battery holder (50).

4. The battery device of claim 1, wherein the cushion pad (30) has a thermal insulation portion that is attached to the second side of the second battery (22).

5. The battery device according to any one of claims 1-4, wherein the heat exchange area (11) is provided with a plurality of heat exchange cavities (111), and a plurality of buffer cavities (121) are arranged in the buffer area (12); the plurality of heat exchange cavities (111) and the plurality of heat exchange cavities (111) are all arranged in a second direction; the second direction is perpendicular to the first direction.

6. The battery device according to claim 5, characterized in that at least one first separator (112) is provided in the heat exchange zone (11); the at least one first partition (112) is used for forming at least two heat exchange cavities (111) in the heat exchange area (11) in a separated mode; at least one second partition (122) is arranged in the buffer zone (12).

7. The battery device according to claim 6, wherein the second separator (122) is disposed obliquely.

8. The battery device of any one of claims 1-4, wherein the battery device is a battery pack or a battery pack.

9. The battery device according to claim 1, wherein the battery fixing member (50) is a beam or an end plate.

Images