Heat exchange plate, battery pack and electric device

Abstract

The utility model provides a kind of heat exchange plate, battery pack and electric device, wherein, heat exchange plate includes: first plate body;Second plate body, and first plate body is superposed and is spaced apart, second plate body includes plate main body and the first flow channel groove being set on plate main body, first flow channel groove is recessed towards direction away from first plate body, plate main body in the side portion of first flow channel groove has first connecting area and first communication area, wherein, first connecting area is used to connect with first plate body, first communication area is connected between first connecting area and first flow channel groove, first communication area and first plate body between form the first supplementary flow channel that is communicated with first flow channel groove.This application technical scheme can effectively solve the problem of low heat exchange efficiency of heat exchange plate in relevant technology.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, and more specifically, to a heat exchange plate, a battery pack, and an electrical device. Background Technology

[0002] In related technologies, heat exchange plates are an important structure in battery packs. They can exchange heat with individual battery cells to ensure that the individual battery cells operate at a suitable temperature, thereby guaranteeing the charging and discharging performance and service life of the individual battery cells.

[0003] The heat exchange plate can be formed by stacking two or more plates, at least one of which is a flow channel plate with flow channel grooves extending along a predetermined trajectory. The flow channels on the heat exchange plate are formed between the sidewalls and bottom wall of the flow channel grooves and the plates opposite to the flow channel plate. However, the cross-sectional area of ​​the flow channels on existing heat exchange plates is small, which can accommodate less heat exchange medium, resulting in low heat exchange efficiency. Utility Model Content

[0004] The main objective of this invention is to provide a heat exchange plate, a battery pack, and an electrical device to solve the problem of low heat exchange efficiency of heat exchange plates in related technologies.

[0005] To achieve the above objectives, according to one aspect of the present invention, a heat exchange plate is provided, comprising: a first plate body; and a second plate body stacked and spaced apart from the first plate body. The second plate body includes a plate body and a first flow channel groove disposed on the plate body. The first flow channel groove is recessed in a direction away from the first plate body. The plate body located on the side of the first flow channel groove has a first connecting region and a first communicating region. The first connecting region is used to connect with the first plate body, and the first communicating region connects the first connecting region and the first flow channel groove. A first supplementary flow channel communicating with the first flow channel groove is formed between the first communicating region and the first plate body.

[0006] According to another aspect of the present invention, a battery pack is provided, including a heat exchange plate, wherein the heat exchange plate is the heat exchange plate described above.

[0007] According to another aspect of the present invention, an electrical device is provided, including a battery pack, wherein the battery pack is the aforementioned battery pack.

[0008] By applying the technical solution of this utility model, a main flow channel is formed between the first flow channel groove and the first plate. The plate body located on the side of the first flow channel groove has a first connecting region and a first linking region arranged sequentially in a direction away from the first flow channel groove. The first linking region is connected to the first plate to connect the first plate and the second plate and separate the various flow channels between the first and second plates. A first supplementary flow channel communicating with the main flow channel is formed between the first connecting region and the first plate. While ensuring the connection strength between the first and second plates, the capacity of a single flow channel is expanded, allowing more heat exchange medium to be introduced, thereby improving the heat exchange effect between the heat exchange plate and the battery, i.e., improving the heat exchange efficiency. Therefore, the technical solution of this application can effectively solve the problem of low heat exchange efficiency of heat exchange plates in related technologies. Attached Figure Description

[0009] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an undue limitation of the present invention. In the drawings:

[0010] Figure 1 A three-dimensional structural schematic diagram of an embodiment of the heat exchange plate according to the present invention is shown;

[0011] Figure 2 It shows Figure 1 An enlarged view of point A on the heat exchanger plate;

[0012] Figure 3 It shows Figure 1 A three-dimensional structural diagram of the heat exchange plate from another angle;

[0013] Figure 4 It shows Figure 3 Enlarged view of point B on the heat exchange plate;

[0014] Figure 5 It shows Figure 1 An enlarged view of a portion of the structure of the first plate of the heat exchanger.

[0015] Figure 6 It shows Figure 1 A cross-sectional schematic diagram of part of the heat exchanger plate structure;

[0016] Figure 7 It shows Figure 1 A cross-sectional schematic diagram of another part of the heat exchanger plate structure.

[0017] The above figures include the following reference numerals:

[0018] 10. First plate; 11. Connecting port; 111. First liquid inlet; 112. Liquid outlet; 113. Second liquid inlet;

[0019] 20. Second plate; 21. Plate body; 211. First connecting area; 212. First communicating area; 213. Second communicating area; 214. Second connecting area; 215. Third connecting area; 22. First flow channel groove; 23. Second flow channel groove; 24. Third flow channel groove; 241. First liquid inlet groove; 242. Liquid outlet groove; 243. Second liquid inlet groove;

[0020] 31. First supplementary flow channel; 32. Second supplementary flow channel;

[0021] 40. Liquid inlet / outlet assembly; 41. Connecting block; 42. Liquid inlet pipe; 43. Liquid outlet pipe;

[0022] 50. Connecting parts. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present utility model or its application or use. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0024] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0025] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps described in these embodiments do not limit the scope of this invention. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0026] like Figure 1 , Figure 2 and Figure 6 As shown, this application provides a heat exchange plate. An embodiment of the heat exchange plate of this application includes a first plate body 10 and a second plate body 20, wherein the second plate body 20 is stacked and spaced apart from the first plate body 10. The second plate body 20 includes a plate body 21 and a first flow channel groove 22 disposed on the plate body 21. The first flow channel groove 22 is recessed in a direction away from the first plate body 10. The plate body 21 located on the side of the first flow channel groove 22 has a first connecting region 211 and a first communicating region 212, wherein the first connecting region 211 is used to connect with the first plate body 10, and the first communicating region 212 connects the first connecting region 211 and the first flow channel groove 22. A first supplementary flow channel 31 communicating with the first flow channel groove 22 is formed between the first communicating region 212 and the first plate body 10.

[0027] Applying the technical solution of this embodiment, a main flow channel is formed between the first flow channel groove 22 and the first plate 10. The plate body 21 located on the side of the first flow channel groove 22 has a first connecting region 212 and a first connecting region 211 arranged sequentially in a direction away from the first flow channel groove 22. The first connecting region 211 is connected to the first plate 10 to connect the first plate 10 and the second plate 20 and separate the various flow channels between the first plate 10 and the second plate 20. A first supplementary flow channel 31, communicating with the main flow channel, is formed between the first connecting region 212 and the first plate 10. While ensuring the connection strength between the first plate 10 and the second plate 20, the capacity of a single flow channel (the main flow channel and the first supplementary flow channel 31 together form a single flow channel) is expanded (i.e., the capacity of a single flow channel to accommodate heat exchange medium is increased), allowing more heat exchange medium to be introduced, thereby improving the heat exchange effect between the heat exchange plate and the battery, i.e., improving heat exchange efficiency. Therefore, the technical solution of this embodiment can effectively solve the problem of low heat exchange efficiency of heat exchange plates in related technologies.

[0028] It should be noted that the phrase "the first flow channel groove 22 is recessed in the direction away from the first plate 10" refers to the bottom wall of the first flow channel groove 22 being located away from the first plate 10 relative to the side wall of the plate body 21 near the first plate 10. Specifically, in this embodiment, the second plate 20 is a stamped plate structure, that is, the first flow channel groove 22 is formed by stamping. Of course, in other feasible embodiments, the first flow channel groove can also be formed on a plate with a certain thickness by stripping material, or the second plate can be formed by injection molding. The phrase "the first connecting region 212 is connected between the first connecting region 211 and the first flow channel groove 22" refers to the fact that both sides of the first connecting region 212 are directly connected to the first connecting region 211 and the first flow channel groove 22, respectively.

[0029] The first flow channel 22 is a long strip structure, and the "side of the first flow channel 22" mentioned above refers to the side of the long side of this long strip structure. Figure 6 As shown, a first connecting region 211 and a first communicating region 212 are provided on both the left and right sides of the first flow channel 22. Of course, in an embodiment not shown in the figure, the first connecting region and the first communicating region may only be provided on one side of the first flow channel, and a connecting region connected to the first flow channel and connected to the first plate may be directly provided on the other side of the first flow channel.

[0030] In existing technologies, the common approach is to connect the non-channel sections of two adjacent plates by welding or other methods. This results in a connection strength far exceeding the required strength. This embodiment, however, expands the capacity of a single flow channel by releasing a portion of the original connecting surface to form a connected area, while still meeting the connection strength requirements of the first plate 10 and the second plate 20. In other words, this embodiment increases the capacity of a single flow channel by reducing the connection area between the first plate 10 and the second plate 20, thus increasing the heat exchange efficiency by allowing more heat exchange medium to flow through the single channel.

[0031] Specifically, in this embodiment, the heat exchange plate is a cooling plate used to cool the batteries in the battery pack. Of course, in other feasible embodiments, the heat exchange plate can also be a heating plate.

[0032] like Figure 6As shown, the plate body 21 is also provided with a second flow channel groove 23. The second flow channel groove 23 is spaced apart from the first flow channel groove 22 and recessed in a direction away from the first plate body 10. The plate body 21 located between the first flow channel groove 22 and the second flow channel groove 23 has a second connecting region 213, a first connecting region 211 and a first connecting region 212. The second connecting region 213 connects the first connecting region 211 and the second flow channel groove 23. A second supplementary flow channel 32 communicating with the second flow channel groove 23 is formed between the second connecting region 213 and the first plate body 10. That is, the first connecting region 212 and the second connecting region 213 are respectively provided on both sides of the first connecting region 211, so that the first supplementary flow channel 31 and the second supplementary flow channel 32 are respectively formed on both sides of the first connecting region 211, so that the impact of the heat exchange medium on both sides of the connection portion 50 formed between the first connecting region 211 and the first plate body 10 is approximately the same.

[0033] The first plate 10 and the second plate 20 can be connected by welding. Specifically, the first plate 10 and the second plate 20 can be connected by any one of the following methods: laser welding, brazing, friction welding, resistance welding, electron beam welding, gas welding, and ultrasonic welding. That is, the first connection area 211 and the first plate 10 can be connected by any of the above-mentioned welding methods. The connecting part 50 can be the solder that connects the two, or it can be a structure formed by melting and connecting a portion of the first connection area 211 and the first plate 10 together.

[0034] Preferably, the first plate 10 and the second plate 20 are connected by laser welding. Laser welding can firmly connect the first connection area 211 and the first plate 10 with a certain distance between them. Compared with welding methods such as brazing, laser welding can achieve the same connection strength with a smaller connection area, thereby making the width of the first connected area 212 and / or the second connected area 213 wider.

[0035] like Figure 6As shown, the first connecting region 211 has a first width W1, the first connected region 212 has a second width W2, and the second connected region 213 has a third width W3. The first width W1, the second width W2, and the third width W3 satisfy the condition: 0.01 ≤ W1 / (W1+W2+W3) ≤ 0.56. By ensuring that the first width W1, the second width W2, and the third width W3 satisfy the above condition, the second width W2 and the third width W3 can be made as large as possible while satisfying the connection strength between the first plate 10 and the second plate 20. This, in turn, maximizes the volume of the first supplementary flow channel 31 and the second supplementary flow channel 32, thereby improving the expansion effect of a single flow channel. Preferably, W1 / (W1+W2+W3) can be 0.01, 0.07, 0.13, 0.19, 0.25, 0.31, 0.37, 0.43, 0.49, or 0.56.

[0036] like Figure 6 As shown, the first width W1 satisfies: 0.25mm ≤ W1 ≤ 0.7mm. By keeping the first width W1 within the above range, the area of ​​the first connecting region 211 can be minimized while ensuring the connection strength between the first plate 10 and the second plate 20. This allows the plate body 21 between the first flow channel 22 and the second flow channel 23 to have more area forming the first connecting region 212 and the second connecting region 213. Preferably, the first width W1 can be 0.25mm, 0.34mm, 0.43mm, 0.52mm, 0.61mm, or 0.7mm.

[0037] like Figure 6 As shown, the second width W2 and the third width W3 satisfy: 0.5mm ≤ W2 = W3 ≤ 10mm. By making the second width W2 and the third width W3 the same, the impact of the heat exchange medium on both sides of the connection portion 50 formed between the first connection area 211 and the first plate 10 is approximately the same. By keeping the second width W2 and the third width W3 within the above-mentioned range, the impact on the connection strength of the first plate 10 and the second plate 20 can be reduced while expanding the volume of a single flow channel. Preferably, the second width W2 and the third width W3 can be 0.5mm, 2.4mm, 4.3mm, 6.2mm, 8.1mm, or 10mm.

[0038] like Figure 6As shown, the bottom wall of the first flow channel 22 and the first plate 10 have a first gap D1 in the stacking direction of the first plate 10 and the second plate 20, and the first connecting region 212 and the first plate 10 have a second gap D2 in the stacking direction of the first plate 10 and the second plate 20. The first gap D1 and the second gap D2 satisfy the condition: 0.001 ≤ D2 / D1 < 1. Wherein, "the stacking direction of the first plate 10 and the second plate 20" is... Figure 6 Left and right directions in the middle Figure 7 The vertical direction within the structure. By making the first interval D1 larger than the second interval D2, and ensuring that the ratio between the second interval D2 and the first interval D1 is within the aforementioned range, it is possible to expand the capacity of a single flow channel through the first supplementary flow channel 31, while simultaneously enabling a stable connection between the first plate 10 and the second plate 20 even using a solderless connection method, thus guaranteeing the connection strength between the first plate 10 and the second plate 20. Preferably, D2 / D1 can be 0.001, 0.112, 0.223, 0.334, 0.445, 0.556, 0.667, 0.778, 0.889, or 0.988.

[0039] The first interval D1 satisfies: 0.1mm ≤ D1 ≤ 10mm; the second interval D2 satisfies: 0.01mm ≤ D2 ≤ 1.5mm. By keeping the first interval D1 within the above range, each flow channel has sufficient height to accommodate enough heat exchange medium. For direct-cooling heat exchange plates (where refrigerant from the vehicle's air conditioning system is directly introduced into the heat exchange plate), 0.1mm≤D1≤5mm. Preferably, the first interval D1 of the direct-cooling heat exchange plate can be 0.1mm, 1mm, 2mm, 3mm, 4mm, or 5mm. For liquid-cooling heat exchange plates (where circulating coolant is introduced into the heat exchange plate), 0.1mm≤D1≤10mm. Preferably, the first interval D1 of the liquid-cooling heat exchange plate can be 0.1mm, 1.2mm, 2.3mm, 3.4mm, 4.5mm, 5.6mm, 6.7mm, 7.8mm, 8.9mm, or 10mm. By keeping the second interval D2 within the above range, while expanding the capacity of a single flow channel through the first supplementary flow channel 31, the first plate 10 and the second plate 20 can be stably connected even when using a solderless connection method, ensuring the connection strength between the first plate 10 and the second plate 20. Preferably, the second interval D2 can be 0.01mm, 0.17mm, 0.33mm, 0.49mm, 0.65mm, 0.81mm, 0.97mm, 1.13mm, 1.29mm or 1.5mm.

[0040] like Figure 6As shown, the first flow channel 22 has a fourth width W4, and the first connecting region 212 has a second width W2. The fourth width W4 and the second width W2 satisfy the condition: 0.014 ≤ W2 / W4 < 1. By making the second width W2 smaller than the fourth width W4 and the ratio of the second width W2 to the fourth width W4 within the above range, it is possible to expand the capacity of a single flow channel through the first supplementary flow channel 31 while avoiding affecting the connection strength between the first plate 10 and the second plate 20. Preferably, W2 / W4 can be 0.014, 0.123, 0.232, 0.341, 0.450, 0.559, 0.668, 0.777, 0.886, or 0.995.

[0041] The fourth width W4 satisfies: 2mm ≤ W4 ≤ 35mm; the second width W2 satisfies: 0.5mm ≤ W2 ≤ 10mm. By ensuring the fourth width W4 is within the above range, the main flow channel of a single flow path has sufficient width to accommodate sufficient heat exchange medium. Specifically, for direct-cooling heat exchange plates (where refrigerant from the vehicle's air conditioning system is directly introduced into the heat exchange plate), 2mm ≤ W4 ≤ 20mm. Preferably, the fourth width W4 of a direct-cooling heat exchange plate can be 2mm, 6mm, 10mm, 14mm, 18mm, or 20mm. For liquid-cooling heat exchange plates (where circulating coolant is introduced into the heat exchange plate), 2mm ≤ W4 ≤ 35mm. Preferably, the fourth width W4 of a liquid-cooling heat exchange plate can be 2mm, 9mm, 16mm, 23mm, 30mm, or 35mm. By keeping the second width W2 within the aforementioned range, the impact on the connection strength of the first plate 10 and the second plate 20 can be reduced while expanding the capacity of a single flow channel through the first supplementary flow channel 31. Preferably, the second width W2 can be 0.5mm, 2.4mm, 4.3mm, 6.2mm, 8.1mm, or 10mm.

[0042] It should be noted that the width of the flow channel mentioned in this embodiment refers to the dimension of the flow channel in the direction perpendicular to its own extension direction, and the width of the connecting area and the connected area refers to the dimension of the connecting area and the connected area in the direction perpendicular to the extension direction of the adjacent flow channel.

[0043] like Figures 1 to 5As shown, the plate body 21 is also provided with a third flow channel groove 24. The third flow channel groove 24 is recessed in the direction away from the first plate body 10. The plate body 21 located on the side of the third flow channel groove 24 has a second connection area 214. The second connection area 214 is used to connect with the first plate body 10. The first plate body 10 is provided with a communication port 11. The communication port 11 is used for liquid inlet or liquid outlet and is arranged opposite to the third flow channel groove 24. The area of ​​the first plate body 10 corresponding to the first flow channel groove 22 is a closed structure. The first connection area 211 has a first width W1, and the second connection area 214 has a fifth width W5, wherein the fifth width W5 is greater than the first width W1. The connecting port 11 is used to introduce or discharge the heat exchange medium. The heat exchange medium in the third flow channel 24, which is opposite to the connecting port 11, has a large flow rate and high velocity. This makes the fifth width W5 of the second connecting area 214 on the side of the third flow channel 24 relatively large, which can ensure the connection strength between the plate body 21 on the side of the third flow channel 24 and the first plate body 10. The area of ​​the first plate body 10 corresponding to the first flow channel 22 is a closed structure, that is, the first flow channel 22 is not directly connected to the connecting port 11. The flow rate and velocity of the heat exchange medium in this area are relatively small. By making the first width W1 of the first connecting area 211 on the side of the first flow channel 22 relatively small, more surface area of ​​the plate body 21 can be released to form a connecting area, thereby increasing the flow rate of a single flow channel.

[0044] In this embodiment, by flexibly setting the width of the connection area at different locations on the heat exchange plate according to the flow rate and velocity of the flow channels, it is possible to release as much of the surface of the plate body 21 as possible to form a connecting area while ensuring the connection strength between the first plate body 10 and the second plate body 20, thereby increasing the flow volume of a single flow channel to accommodate more heat exchange medium and improve heat exchange efficiency.

[0045] like Figure 1 and Figure 2As shown, the heat exchange plate also includes an inlet / outlet liquid assembly 40 mounted on the first plate body 10. The inlet / outlet liquid assembly 40 is connected to the third flow channel groove 24 through a connecting port 11 to introduce heat exchange medium into the flow channel on the heat exchange plate and to discharge the heat exchange medium after heat exchange. Specifically, the inlet / outlet liquid assembly 40 includes a connecting block 41 mounted on the first plate body 10 and an inlet pipe 42 and an outlet pipe 43 mounted on the connecting block 41. The third flow channel 24 includes a first liquid inlet 241, a second liquid inlet 243, and a liquid outlet 242. The first plate 10 is provided with a first liquid inlet 111 corresponding to the first liquid inlet 241, a second liquid inlet 113 corresponding to the second liquid inlet 243, and a liquid outlet 112 corresponding to the liquid outlet 242. The connecting block 41 is provided with an inlet pipe connecting the inlet pipe 42 to the first liquid inlet 111 and the second liquid inlet 113, and an outlet pipe connecting the outlet pipe 43 and the outlet 112, thereby realizing two loops on the heat exchange plate from the first liquid inlet 111 to the outlet 112 and from the second liquid inlet 113 to the outlet 112.

[0046] It should be noted that the circuit configuration on the heat exchange plate described above is only illustrative, and those skilled in the art can configure different circuit structures according to cooling requirements.

[0047] like Figure 3 and Figure 7 As shown, the plate body 21 has a third connecting region 215 extending along the circumferential edge of the plate body 21. The third connecting region 215 is used to connect with the first plate body 10. The third connecting region 215 has a sixth width W6, which satisfies the following condition: 2mm ≤ W6 ≤ 50mm. The third connecting region 215 is an annular structure surrounding the plate body 21. By keeping the sixth width W6 of the third connecting region 215 within the aforementioned range, more surface area of ​​the plate body 21 can be freed up to form a connecting region while ensuring the circumferential connection strength between the first plate body 10 and the second plate body 20, thereby increasing the flow rate of a single channel. Preferably, the sixth width W6 can be 2mm, 7mm, 12mm, 17mm, 22mm, 27mm, 32mm, 37mm, 42mm, 47mm, or 50mm.

[0048] This application also provides a battery pack, an embodiment of which includes a heat exchange plate, wherein the heat exchange plate is the aforementioned heat exchange plate. The aforementioned heat exchange plate can effectively solve the problem of low heat exchange efficiency in related technologies, and the battery pack having the aforementioned heat exchange plate also has the aforementioned advantages.

[0049] This application also provides an electrical device, an embodiment of which includes a battery pack, wherein the battery pack is the aforementioned battery pack. The aforementioned battery pack effectively solves the problem of low heat exchange efficiency of heat exchange plates in related technologies, and the electrical device having the aforementioned battery pack also has the aforementioned advantages.

[0050] In the description of this utility model, it should be understood that "multiple" means two or more. Directional terms such as "front, back, up, down, left, right," "horizontal, vertical, perpendicular, horizontal," and "top, bottom" indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. These terms are used solely for the convenience of describing this utility model and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as limiting the scope of protection of this utility model. The directional terms "inner" and "outer" refer to the inner or outer contours relative to the outline of each component itself.

[0051] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0052] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be construed as limiting the scope of protection of this utility model.

[0053] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A heat exchange plate, characterized in that, include: First plate (10); The second plate (20) is stacked and spaced apart from the first plate (10). The second plate (20) includes a plate body (21) and a first flow channel groove (22) disposed on the plate body (21). The first flow channel groove (22) is recessed in a direction away from the first plate (10). The plate body (21) located on the side of the first flow channel groove (22) has a first connecting region (211) and a first communicating region (212). The first connecting region (211) is used to connect with the first plate (10). The first communicating region (212) connects the first connecting region (211) and the first flow channel groove (22). A first supplementary flow channel (31) communicating with the first flow channel groove (22) is formed between the first communicating region (212) and the first plate (10).

2. The heat exchange plate according to claim 1, characterized in that, The plate body (21) is also provided with a second flow channel groove (23). The second flow channel groove (23) is spaced apart from the first flow channel groove (22) and recessed in a direction away from the first plate body (10). The plate body (21) located between the first flow channel groove (22) and the second flow channel groove (23) has a second connecting region (213), a first connecting region (211) and a first connecting region (212). The second connecting region (213) is connected between the first connecting region (211) and the second flow channel groove (23). A second supplementary flow channel (32) communicating with the second flow channel groove (23) is formed between the second connecting region (213) and the first plate body (10).

3. The heat exchange plate according to claim 2, characterized in that, The first connecting region (211) has a first width W1, the first connected region (212) has a second width W2, and the second connected region (213) has a third width W3. The first width W1, the second width W2 and the third width W3 satisfy the following condition: 0.01≤W1 / (W1+W2+W3)≤0.

56.

4. The heat exchange plate according to claim 3, characterized in that, The first width W1 satisfies: 0.25mm ≤ W1 ≤ 0.7mm; and / or, The second width W2 and the third width W3 satisfy the following condition: 0.5mm ≤ W2 = W3 ≤ 10mm.

5. The heat exchange plate according to any one of claims 1 to 4, characterized in that, The bottom wall of the first flow channel (22) and the first plate (10) have a first interval D1 in the stacking direction of the first plate (10) and the second plate (20), and the first connecting region (212) and the first plate (10) have a second interval D2 in the stacking direction of the first plate (10) and the second plate (20). The first interval D1 and the second interval D2 satisfy: 0.001≤D2 / D1<1.

6. The heat exchange plate according to claim 5, characterized in that, The first interval D1 satisfies: 0.1mm ≤ D1 ≤ 10mm; and / or, The second interval D2 satisfies: 0.01mm≤D2≤1.5mm.

7. The heat exchange plate according to claim 1 or 2, characterized in that, The first flow channel (22) has a fourth width W4, and the first connected region (212) has a second width W2. The fourth width W4 and the second width W2 satisfy the following condition: 0.014 ≤ W2 / W4 < 1.

8. The heat exchange plate according to claim 7, characterized in that, The fourth width W4 satisfies: 2mm ≤ W4 ≤ 35mm; and / or, The second width W2 satisfies: 0.5mm≤W2≤10mm.

9. The heat exchange plate according to claim 1 or 2, characterized in that, The plate body (21) is also provided with a third flow channel groove (24), which is recessed in the direction away from the first plate body (10). The plate body (21) located on the side of the third flow channel groove (24) has a second connection area (214), which is used to connect with the first plate body (10). The first plate body (10) is provided with a communication port (11), which is used for liquid inlet or liquid outlet and is arranged opposite to the third flow channel groove (24). The area of ​​the first plate body (10) corresponding to the first flow channel groove (22) is a closed structure. The first connection area (211) has a first width W1, and the second connection area (214) has a fifth width W5, wherein the fifth width W5 is greater than the first width W1.

10. The heat exchange plate according to any one of claims 1 to 4, characterized in that, The plate body (21) has a third connecting region (215) extending along the circumferential edge of the plate body (21), the third connecting region (215) is used to connect with the first plate body (10), the third connecting region (215) has a sixth width W6, the sixth width W6 satisfies: 2mm≤W6≤50mm.

11. The heat exchange plate according to any one of claims 1 to 4, characterized in that, The first plate (10) and the second plate (20) are connected by any one of laser welding, brazing, friction welding, resistance welding, electron beam welding, gas welding and ultrasonic welding.

12. A battery pack, comprising a heat exchange plate, characterized in that, The heat exchange plate is the heat exchange plate according to any one of claims 1 to 11.

13. An electrical device comprising a battery pack, characterized in that, The battery pack is the battery pack according to claim 12.

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