CN219017767U - Heat exchange plate and battery device - Google Patents

Abstract

The utility model discloses a heat exchange plate and a battery device. The heat exchange plate includes a heat exchange area and a buffer zone distributed in a first direction, at least one first separator is arranged in the heat exchange area; at least one first separator The plate is used to separate and form at least two heat exchange cavities in the heat exchange area; at least one second partition is arranged in the buffer zone; at least one second partition is used to separate and form at least two buffer cavities in the buffer zone ; The distance from the first partition of each heat exchange cavity to the center line of the corresponding heat exchange cavity is H1, and the distance from the second partition of each buffer cavity to the center line of the adjacent heat exchange cavity For H2, H2/H1 is 0.05-0.98. A battery device includes at least two batteries and the heat exchange plate. The utility model effectively slows down deformation during use and improves heat exchange efficiency.

Description

Heat exchange plate and battery device

Technical Field

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

Background Art

At present, with the development of the new energy vehicle industry, consumers' requirements for fast charging of power batteries are gradually increasing. However, power batteries will expand during the charging and discharging process, and the degree of expansion directly affects the cycle life of the battery. In power batteries, heat exchange is generally carried out by heat exchange plates. Since the heat exchange plates are set between the single cells of the power battery, the expansion force generated by the single cells during the charging and discharging process will squeeze the battery, causing the heat exchange plates to deform and affect the heat exchange performance.

Utility Model Content

In order to overcome the shortcomings of the prior art, one of the purposes of the utility model is to provide a heat exchange plate, in which the second partition of the buffer cavity deviates from the center of the heat exchange cavity, so as to avoid squeezing the center of the heat exchange cavity when the buffer zone is subjected to force, effectively slowing down the deformation of the heat exchange cavity during use and improving the heat exchange efficiency.

The second purpose of the utility model is to provide a battery device, in which the second partition of the buffer cavity in the heat exchange plate is offset from the center of the heat exchange cavity, so as to avoid the buffer zone from squeezing the center of the heat exchange cavity when the battery is squeezed, effectively slowing down the deformation of the heat exchange cavity during use, and effectively slowing down the deformation of the heat exchange plate during use, thereby improving the heat exchange efficiency.

One of the purposes of the utility model is achieved by the following technical solution:

A heat exchange plate, comprising a heat exchange zone and a buffer zone distributed in a first direction, wherein at least one first partition is provided in the heat exchange zone; the at least one first partition is used to separate at least two heat exchange cavities in the heat exchange zone; the heat exchange cavity is used to exchange heat through a heat exchange medium; at least two of the heat exchange cavities are distributed in a second direction; at least one second partition is provided in the buffer zone; the at least one second partition is used to separate at least two buffer cavities in the buffer zone; the buffer cavity is used to absorb the force of the heat exchange plate by deformation to buffer the force of the heat exchange plate; at least two of the buffer cavities are distributed in the second direction; the second direction is perpendicular to the first direction; the distance from the first partition of each heat exchange cavity to the center line of the adjacent heat exchange cavity is H1, the distance from the second partition of each buffer cavity to the center line of the adjacent heat exchange cavity is H2, and H2/H1 is 0.05-0.98.

The second purpose of the utility model is achieved by the following technical solution:

A battery device comprising:

At least two batteries, wherein the surface of the battery with the largest surface area is the large surface of the battery;

The heat exchange plate, the at least two batteries are arranged in sequence in the first direction; a heat exchange plate is provided between the large battery surfaces of two adjacent batteries, the heat exchange zone of the heat exchange plate is in contact with the large battery surface of one of the batteries; the buffer zone of the heat exchange plate is in contact with the large battery surface of another adjacent battery.

Compared with the prior art, the beneficial effects of the present invention are:

1. The heat exchange zone of the heat exchange plate can be divided into at least two heat exchange cavities by setting at least one first partition. On the one hand, the heat exchange medium can be dispersed and introduced through at least two heat exchange cavities for heat exchange, and the heat exchange effect is more uniform. On the other hand, the at least one first partition can form a reinforcement effect inside the heat exchange zone to reduce the deformation of the heat exchange zone. The deformation of the heat exchange zone is small, the heat exchange fluid flows more smoothly, and the heat exchange effect is better.

2. When the heat exchange plate is used in a battery device, the buffer zone of the heat exchange plate is easily squeezed by the battery, and the ratio of the distance from the second partition in the buffer zone of the heat exchange plate to the center line of the buffer cavity to the distance from the first partition in the heat exchange zone to the center line of the heat exchange cavity is between 0.05-0.98, that is, the second partition deviates from the center of the heat exchange cavity, thereby avoiding deformation of the heat exchange cavity caused by the buffer cavity in the buffer zone squeezing the center position of the heat exchange cavity when being squeezed and deformed, thereby effectively slowing down the deformation of the heat exchange zone, reducing the flow resistance of the heat exchange cavity, and improving the heat exchange efficiency.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a schematic structural diagram of a heat exchange plate of the present invention;

FIG2 is a schematic diagram of a partially enlarged structure in FIG1 ;

FIG3 is another schematic diagram of the structure of the heat exchange plate of the present invention;

FIG4 is another schematic diagram of the structure of the heat exchange plate of the present invention;

FIG5 is a schematic structural diagram of a battery pack of the present invention.

In the figure: 10, heat exchange plate; 11, heat exchange zone; 111, first partition; 112, heat exchange cavity; 12, buffer zone; 121, second partition; 122, buffer cavity; 13, current collector; 20, battery pack; 30, beam body.

DETAILED DESCRIPTION

Below, in conjunction with the accompanying drawings and specific implementation methods, the utility model is further described:

In the description of the present invention, it should be noted that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc. indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

As shown in FIG. 1 and FIG. 2, a heat exchange plate 10 includes a heat exchange area 11 and a buffer area 12, and the heat exchange area 11 and the buffer area 12 are distributed in the first direction (see the X direction in FIG. 1). At least one first partition 111 is provided in the heat exchange area 11; after being provided in the heat exchange area 11, the at least one first partition 111 can separate the heat exchange area 11 into at least two heat exchange cavities 112, and the heat exchange cavity 112 can be used for heat exchange through a heat exchange medium, and the at least two heat exchange cavities 112 are distributed in the second direction (see the Y direction in FIG. 1). In this embodiment, the first direction is the thickness direction of the heat exchange plate, and the second direction can be the height direction of the heat exchange plate, and the thickness of the heat exchange plate refers to that after the heat exchange plate is applied to a battery device or a battery pack, the first direction is the arrangement direction of the batteries of the battery device, and the second direction is the height direction of the batteries.

Similarly, at least one second partition 121 is provided in the buffer zone 12. After being provided in the buffer zone 12, the at least one second partition 121 can separate the buffer zone 12 into at least two buffer cavities 122. The buffer cavities can be used to absorb the force of the heat exchange plate through deformation to buffer the force of the heat exchange plate. Similarly, the at least two buffer cavities 122 are distributed in the second direction.

Specifically, the distance from the first partition 111 of each heat exchange cavity 112 to the center line of the corresponding heat exchange cavity 112 is H1, the distance from the second partition 121 of each buffer cavity 122 to the center line of the adjacent heat exchange cavity is H2, and H2/H1 is 0.05-0.98.

Since the heat exchange zone is provided with at least two heat exchange cavities, and the buffer zone has at least two buffer cavities, in the second direction, the buffer cavity must have a heat exchange cavity structure adjacent thereto.

Since there are various corresponding relationships between the plurality of second partitions and the plurality of heat exchange cavities in actual situations, in this embodiment, the second partitions and the heat exchange cavities adjacent thereto are described with the following three corresponding relationships:

The first correspondence is that each second partition corresponds to a heat exchange cavity setting. Referring to Figure 1, when the second partition is a, the adjacent heat exchange cavity is A, and when the second partition is b, the adjacent heat exchange cavity is B. By analogy, based on this structure, each heat exchange cavity has a corresponding second partition to bear the expansion force of the battery, effectively buffering each heat exchange cavity in the heat exchange area.

The second corresponding relationship is that every at least two second partitions correspond to a heat exchange cavity setting, referring to Figure 3, when the second partition is a1, the adjacent heat exchange cavity is A1; when the second partition is b1, the adjacent heat exchange cavity is B1, and so on. Based on such a structure, although each heat exchange cavity has a second partition for buffering, the more second partitions correspond to the same heat exchange cavity, the stronger the buffer zone at the corresponding position will be, making it less likely to deform and having a poor buffering effect.

The third corresponding relationship is that at least two heat exchange cavities are distributed in the heat exchange section corresponding to each two second partitions, see Figure 4. Under this corresponding relationship, the second partition a2 and the heat exchange cavity adjacent to it are A2, the second partition b2 and the heat exchange cavity adjacent to it are B3, and so on. Based on this structure, there will be at least one heat exchange cavity that does not correspond to the second partition setting, and the buffer zone will have a buffer blind spot. At this time, the buffer zone cannot effectively buffer each heat exchange cavity, and the buffering effect is poor.

Of course, the corresponding relationship between the distribution of multiple second partitions and the distribution of multiple heat exchange cavities is not limited to the above-mentioned ones. In short, the heat exchange cavity adjacent to the second partition refers to the heat exchange cavity corresponding to the connection position between the end of the second partition close to the heat exchange zone and the heat exchange zone, and the distance H2 from the second partition to the adjacent heat exchange cavity is the distance from the point where the second partition contacts the wall of the heat exchange cavity to the center line.

On the basis of the above structure, after the heat exchange plate 10 is applied to the battery device 20, during actual assembly, the battery device 20 is formed by stacking a plurality of batteries, and the plurality of batteries can be arranged in sequence in the first direction. Specifically, the heat exchange plate 10 has the following two installation positions in the battery box:

The first installation position: the heat exchange plate 10 is arranged between two adjacent batteries in the first direction. Since the heat exchange plate 10 has a heat exchange area 11 and a buffer area 12 on both sides of the first direction, when the heat exchange plate 10 is used between two adjacent batteries, the heat exchange area 11 of the heat exchange plate 10 can be attached to one of the batteries, and the buffer area 12 of the heat exchange plate 10 can be attached to the other battery. The heat exchange area 11 of the heat exchange plate 10 can be used to exchange heat for the battery, and the buffer area 12 of the heat exchange plate 10 can buffer the extrusion force applied to the heat exchange plate 10 by the battery on this side due to its own expansion or external force.

The second installation position: the heat exchange plate 10 is arranged between the battery and the beam body 30 in the battery box. In this installation position, the heat exchange area 11 of the heat exchange plate 10 can be in contact with the battery, and the buffer area 12 of the heat exchange plate 10 can be in contact with the beam body 30 of the battery box. In this case, the heat exchange area 11 of the heat exchange plate 10 is used to exchange heat for the battery, and the buffer area 12 of the heat exchange plate 10 can be used to buffer the extrusion force applied to the heat exchange plate 10 through the beam body 30 when the battery box is subjected to force, which can also achieve a buffering effect.

Regardless of whether the heat exchange plate 10 is used in the first installation position or the second installation position, the heat exchange area 11 and the buffer area 12 thereof can achieve the same effect.

The following description assumes that the heat exchange plate 10 is in the first installation position and is used to cool and dissipate heat for the battery.

When the battery is in normal use, a large amount of heat will be generated in the battery device, so the battery needs to be cooled. Therefore, the heat exchange area 11 of the heat exchange plate 10 is filled with coolant. When the coolant flows in the heat exchange area 11, it can take away the heat generated by the battery attached thereto, thereby cooling the battery device in use, reducing the thermal runaway phenomenon caused by overheating of the battery device, and making it safer to use.

However, since the heat exchange cavity 112 of the heat exchange plate 10 is filled with coolant, the heat exchange area 11 of the heat exchange plate 10 may not be strong enough due to the structure of the heat exchange cavity 112, and the heat exchange plate 10 is arranged between the batteries. The batteries may produce cyclic expansion during use, or vibrate due to external force, causing the batteries to squeeze the heat exchange area 11 of the heat exchange plate 10 that is in contact with it. After the heat exchange area 11 is compressed, it is easy to deform, resulting in obstruction of the flow of coolant in the heat exchange cavity 112, thereby affecting the heat exchange effect.

Therefore, in the present application, the heat exchange zone 11 of the above-mentioned heat exchange plate 10 can be divided into at least two heat exchange cavities 112 by setting at least one first partition 111. On the one hand, the coolant can be dispersed and introduced through at least two heat exchange cavities 112 for heat exchange, and the heat exchange effect is more uniform. On the other hand, the at least one first partition 111 can form a reinforcement effect inside the heat exchange zone 11 to reduce the deformation of the heat exchange zone 11. The deformation of the heat exchange zone 11 is small, the coolant flows more smoothly, and the heat exchange effect is better.

In addition, a buffer zone 12 is provided on the side of the heat exchange zone 11, and the buffer zone 12 is attached to one of the two adjacent batteries. No coolant is introduced into the buffer zone 12, and a buffer cavity 122 is formed by at least one second partition 121. When the single battery expands and squeezes the buffer zone 12, the buffer cavity 122 of the buffer zone 12 is compressed to buffer the force directly applied to the heat exchange zone 11. Similarly, the at least one second partition 121 can form a reinforcing structure with the buffer zone 12 to buffer the battery expansion and squeezing force on this side of the heat exchange plate 10, thereby preventing both sides of the heat exchange plate 10 from being subjected to a greater squeezing force due to battery expansion, and reducing the deformation of the heat exchange zone 11. The deformation of the heat exchange zone 11 is small, the coolant flows more smoothly, and the heat exchange effect is better.

Specifically, since the ratio of the distance H2 from the second partition in the buffer zone of the heat exchange plate to the center line of the buffer cavity to the distance H1 from the first partition in the heat exchange zone to the center line of the heat exchange cavity is between 0.05 and 0.98, that is, the point of application of the second partition 121 in the heat exchange zone 11 deviates from the center line of the heat exchange cavity 112, but the distance from the point of application of the second partition 121 in the heat exchange zone 11 to the center line will be closer to the distance from the first partition 111 to the center line. Therefore, when the buffer zone 12 is subjected to force, the force on the first partition 111 of each buffer cavity 122 will deviate from the center position of the heat exchange cavity 112, and the second partition deviates from the center of the heat exchange cavity, thereby avoiding the deformation of the heat exchange cavity caused by the buffer cavity in the buffer zone squeezing the center position of the heat exchange cavity when being squeezed and deformed, resulting in increased flow resistance and affecting heat dissipation, thereby effectively slowing down the deformation of the heat exchange zone, reducing the flow resistance of the heat exchange cavity, and improving the heat dissipation efficiency.

In addition, since the second partition is offset from the center of the heat exchange cavity and does not correspond to the first partition, that is, the first partition and the second partition cannot be too close, the first partition will not interfere with the second partition when the second partition is subjected to force, so the deformation of the buffer cavity will not be affected. Otherwise, the first partition's support for the buffer cavity and the heat exchange cavity will affect the deformation of the second partition, thereby affecting the deformation of the buffer space. Therefore, in this embodiment, H2/H1 is 0.05-0.98, and the heat dissipation effect is better.

Specifically, the following embodiments all use the temperature rise rate of the battery cell under normal temperature charging conditions to characterize the heat transfer effect:

Embodiment 1,

The distance H2 from the second partition of each buffer cavity to the center line of the buffer cavity is 0.3 mm, the distance H1 from the first partition of each heat exchange cavity to the center line of the heat exchange cavity is 6 mm, and H2/H1 is 0.05. Under this ratio, the temperature rise rate (℃/min) of the battery cell under normal temperature charging conditions is 0.5.

Embodiment 2,

The distance H2 from the second partition of each buffer cavity to the center line of the buffer cavity is 4 mm, the distance H1 from the first partition of each heat exchange cavity to the center line of the heat exchange cavity is 4.1 mm, and H2/H1 is 0.9756. Under this ratio, the temperature rise rate (℃/min) of the battery cell under normal temperature charging conditions is 0.54.

Embodiment 3,

The distance H2 from the second partition of each buffer cavity to the center line of the buffer cavity is 0.5 mm, the distance H1 from the first partition of each heat exchange cavity to the center line of the heat exchange cavity is 5 mm, and H2/H1 is 0.1. Under this ratio, the temperature rise rate (℃/min) of the battery cell under normal temperature charging conditions is 0.51.

Embodiment 4,

The distance H2 from the second partition of each buffer cavity to the center line of the buffer cavity is 2 mm, the distance H1 from the first partition of each heat exchange cavity to the center line of the heat exchange cavity is 2.2 mm, and H2/H1 is 0.9091. Under this ratio, the temperature rise rate (℃/min) of the battery cell under normal temperature charging conditions is 0.52.

Embodiment 5,

The distance H2 from the second partition of each buffer cavity to the center line of the buffer cavity is 3 mm, the distance H1 from the first partition of each heat exchange cavity to the center line of the heat exchange cavity is 4.2 mm, and H2/H1 is 0.7143. Under this ratio, the temperature rise rate (℃/min) of the battery cell under normal temperature charging conditions is 0.53.

Comparative Example 1,

The distance H2 from the second partition of each buffer cavity to the center line of the buffer cavity is 1.98 mm, the distance H1 from the first partition of each heat exchange cavity to the center line of the heat exchange cavity is 2 mm, and H2/H1 is 0.99. Under this ratio, the temperature rise rate (℃/min) of the battery cell under normal temperature charging conditions is 0.57.

The above-mentioned Examples 1-5 and Comparative Example 1 are prepared into the following Table 1:

Table 1

It can be seen from Table 1 that when H2/H1 is 0.05, 0.9756, 0.1 and 0.71, the temperature rise rate of the corresponding battery cell under normal temperature charging conditions is in the range of 0.5-0.54, that is, the temperature rise rate of the battery is low and the heat transfer effect of the battery is good, which means that when H2/H1 is in the range of 0.05-0.98, the heat transfer effect of the battery is good.

Further, when H2/H1 is in the range of 0.05-0.98, the above H1 is 0.5mm-6mm, and H2 is 0.3mm-5mm.

When H2/H1 is 0.1, the corresponding battery cell temperature rise rate under normal temperature charging conditions is 0.51. When H2/H1 is 0.9, the corresponding battery cell temperature rise rate under normal temperature charging conditions is 0.52. At these two endpoints, the corresponding battery cell temperature rise rates under normal temperature charging conditions are about 0.5, and the battery heat transfer effect is better.

Further, H2/H1 is 0.1-0.9. In the range of H2/H1 being 0.05-0.98, the above-mentioned H1 is 1.5mm-5mm, and H2 is 0.5mm-3mm.

In addition, referring to Comparative Example 1, when H2/H1 is 0.99, the corresponding temperature rise rate of the battery cell under normal temperature charging conditions is 0.57, that is, when H2/H1 is greater than 0.98, the temperature rise rate of the battery cell under normal temperature charging conditions is significantly increased, that is, the heat transfer efficiency is relatively low.

Of course, the above heat exchange refers to the cooling and heat dissipation of the battery by introducing a coolant into the heat exchange cavity. In other cases, when the battery device is used in a relatively low temperature environment, the battery power is easily exhausted due to the relatively low ambient temperature, resulting in low battery efficiency. Therefore, a hot fluid can be introduced into the heat exchange cavity of the heat exchange zone to heat the battery, so that the battery can work at a normal temperature and has a higher working efficiency. That is, the above heat exchange medium can be liquid cooling or liquid heating, and the heat exchange medium can be selected as a gas or liquid in the prior art, such as water, ethylene glycol.

Furthermore, the second partition 121 is tilted, and the tilted second partition 121 can decompose the force applied by the battery along the first direction into two forces in the first direction and the second direction, so the expansion force of the battery in the first direction can be effectively reduced. The heat exchange zone 11 of the heat exchange plate 10 is less likely to deform, and the buffering effect is better, thereby avoiding serious deformation of the heat exchange zone 11 and increasing thermal resistance, thereby improving the cooling effect.

Of course, when the second partition is arranged horizontally, the second partition is parallel to the corresponding center line, so the distances between each point are the same.

Embodiment 6,

In this embodiment, each second partition corresponds to a heat exchange cavity. Referring to Figure 1, when the second partition is a, the adjacent heat exchange cavity is A, and when the second partition is b, the adjacent heat exchange cavity is B. By analogy, based on this structure, each heat exchange cavity has a corresponding second partition to bear the expansion force of the battery, thereby effectively buffering each heat exchange cavity in the heat exchange area.

That is, each heat exchange cavity in the heat exchange zone is provided with a corresponding buffer cavity, that is, each buffer cavity can buffer the corresponding heat exchange cavity, and when the buffer zone is subjected to force, each heat exchange cavity is prevented from being squeezed.

Furthermore, in this embodiment, multiple first partitions 111 and second partitions 121 are provided; multiple first partitions 111 are separated in the heat exchange zone 11 to form multiple heat exchange cavities 112; multiple second partitions 121 are separated in the buffer zone 12 to form multiple buffer cavities 122. In this way, multiple heat exchange cavities 112 can be formed in the heat exchange zone 11 by multiple first partitions 111, which has better strength, more dispersed heat exchange fluid, and more uniform heat exchange effect. Multiple second partitions 121 are provided, which can form multi-point buffering in the buffer zone 12, and can form multiple buffer cavities 122, so that the battery expansion extrusion force or external pressure can be dispersed at multiple points, and the buffering and anti-deformation effect is better.

Furthermore, the heat exchange cavity 112 in this embodiment can be filled with heat exchange fluid (such as water, gas, etc.), and the buffer cavity 122 can be filled with at least one of air, insulation and phase change material. The utility model prefers air so that it can be fully compressed and deformed.

Embodiment 7,

In this embodiment, the battery device is a battery pack, referring to a battery pack 20 shown in Figures 1-5, including at least two batteries, the surface of the battery with the largest surface area is the large surface of the battery, and the heat exchange plate 10 in any of the above embodiments, the large surfaces of two adjacent batteries are provided with a heat exchange plate 10, the heat exchange zone 11 of the heat exchange plate 10 is in contact with the large surface of one of the batteries; the buffer zone 12 of the heat exchange plate 10 is in contact with the large surface of another adjacent battery.

Different from the above-mentioned embodiments 1, during assembly, the heat exchange area 11 of the heat exchange plate 10 can be preferably fitted with the large surface of the battery. The large surface of the battery is the surface with the largest surface area of the battery. In this embodiment, the single cell is a square shell battery as an example. The square shell battery has six surfaces, namely, top and bottom, left and right, and front and back. Among the six surfaces, the surface with the largest surface area is the large surface of the battery, which has a larger contact area with the heat exchange area 11. During heat exchange, by fitting the heat exchange area 11 of the heat exchange plate 10 with the large surface of the battery, a larger area of heat exchange can be achieved, thereby improving the heat exchange efficiency and achieving effective heat exchange of the battery. Of course, when the battery is a cylindrical battery, the cylindrical battery is a cylindrical structure. In this structural case, the large surface of the cylindrical battery can be the outer peripheral surface of the cylinder. Based on such a structure, the heat exchange plate can be arranged in a structure matching the outer peripheral surface of the cylinder to fit the cylindrical battery.

Regardless of whether the heat exchange plate 10 is applied to the first installation position or the second installation position, after the heat exchange plate 10 is applied in the battery pack 20, the heat exchange area 11 and the buffer area 12 can achieve the same effect as in any of the above embodiments, which will not be described in detail.

Embodiment 8,

In this embodiment, the battery device is a battery pack, including a battery box and the battery group 20 in the above embodiment 6. The battery group 20 is installed in the battery box. Since the battery group 20 has the heat exchange plate 10 in any of the above embodiments, after the battery group 20 using the heat exchange plate 10 is assembled to the battery box, it has the effect brought by the heat exchange plate 10. Specifically, the assembly of the heat exchange plate 10, the battery group 20 and the battery box can be the following two installation positions:

The first installation position: the heat exchange plate 10 is arranged between two adjacent batteries in the first direction. Since the heat exchange plate 10 has a heat exchange area 11 and a buffer area 12 on both sides of the first direction, when the heat exchange plate 10 is used between two adjacent batteries, the heat exchange area 11 of the heat exchange plate 10 can be attached to one of the batteries, and the buffer area 12 of the heat exchange plate 10 can be attached to the other battery. The heat exchange area 11 of the heat exchange plate 10 can be used to dissipate heat for the battery, and the buffer area 12 of the heat exchange plate 10 can buffer the extrusion force applied to the heat exchange plate 10 by the battery on this side due to its own expansion or external force.

The second installation position: the heat exchange plate 10 is arranged between the battery and the beam body 30 in the battery box. In this installation position, the heat exchange area 11 of the heat exchange plate 10 can be in contact with the battery, and the buffer area 12 of the heat exchange plate 10 can be in contact with the beam body 30 of the battery box. In this case, the heat exchange area 11 of the heat exchange plate 10 is used to exchange heat for the battery, and the buffer area 12 of the heat exchange plate 10 can be used to buffer the extrusion force applied to the heat exchange plate 10 through the beam body 30 when the battery box is subjected to force, which can also achieve a buffering effect.

Regardless of whether the heat exchange plate 10 is used in the first installation position or the second installation position, the heat exchange area 11 and the buffer area 12 can achieve the same effect as in any of the above embodiments, which will not be described in detail.

For those skilled in the art, various other corresponding changes and deformations can be made according to the technical solutions and concepts described above, and all of these changes and deformations should fall within the protection scope of the claims of the utility model.

Claims (9)

1. The heat exchange plate is characterized in that the heat exchange plate (10) comprises a heat exchange area (11) and a buffer area (12) which are distributed in a first direction, and at least one first partition board (111) is arranged in the heat exchange area (11); the at least one first partition (111) is used for forming at least two heat exchange cavities (112) in the heat exchange area (11) in a separated mode; the heat exchange cavity (112) is used for exchanging heat through a heat exchange medium; at least two of the heat exchange cavities (112) are distributed in a second direction; at least one second partition board (121) is arranged in the buffer zone (12); the at least one second partition (121) is used for forming at least two buffer cavities (122) in the buffer zone (12) in a separated mode; the buffer cavity (122) is used 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 of said buffer cavities (122) being distributed in said second direction; the second direction is perpendicular to the first direction; the distance from the first partition plate (111) of each heat exchange cavity (112) to the central line of the corresponding heat exchange cavity (112) is H1, the distance from the second partition plate (121) of each buffer cavity (122) to the central line of the adjacent heat exchange cavity is H2, and the H2/H1 is 0.05-0.98.

2. A heat exchanger plate (10) according to claim 1, wherein the H2/H1 is 0.1-0.9.

3. A heat exchanger plate (10) according to claim 1, wherein the H1 is 0.5-6 mm.

4. A heat exchanger plate (10) according to claim 3, wherein the H1 is 1.5mm-5mm.

5. A heat exchanger plate (10) according to claim 1, wherein the H2 is 0.3-5 mm.

6. A heat exchanger plate (10) according to claim 5, wherein the H2 is 0.5-3 mm.

7. A heat exchanger plate according to claim 1, wherein the second separator plate (121) is arranged obliquely.

8. A heat exchanger plate according to claim 1, wherein each of said second baffles (121) is arranged in correspondence of one of said heat exchanging cavities (112).

9. A battery device is characterized by comprising,

at least two batteries, wherein the surface with the largest surface area of the batteries is the large surface of the batteries;

the heat exchanger plate (10) according to any one of claims 1-8, the at least two cells being arranged in sequence in the first direction; a heat exchange plate (10) is arranged between the large battery surfaces of two adjacent batteries, and a heat exchange area (11) of the heat exchange plate (10) is attached to one large battery surface of one battery; the buffer area (12) of the heat exchange plate (10) is attached to the large surface of the battery of the other adjacent battery.

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