Heat exchange plate, splicing tool of heat exchange plate, battery pack and electric equipment

Abstract

The invention discloses a heat exchange plate, a splicing tool of the heat exchange plate, a battery pack and electric equipment, the heat exchange plate comprises a plurality of heat exchange units, the heat exchange units extend in the first direction and are sequentially arranged in the second direction, every two adjacent heat exchange units make contact with each other, and a heat exchange channel is formed between every two adjacent heat exchange units. Based on the heat exchange plate formed by splicing the multiple heat exchange units, the layout of heat exchange channels is more regular, the heat exchange performance is improved, the upper contact face and the lower contact face of the liquid cooling plate heat exchange plate are planes, the plane structures can bear larger mechanical stress and vibration, and the structural strength is good.

Description

Technical Field

[0001] The present invention relates to the technical field of battery cooling, and in particular to a heat exchange plate, a heat exchange plate splicing tool, a battery pack and an electrical device. Background Art

[0002] In the related art, a battery pack is provided with a heat exchange plate between battery cells to cool the battery pack temperature. The traditional stamped brazing heat exchange plate structure is composed of a flow channel plate and a temperature equalizing plate. A single-layer heat exchange plate is used to cool a double-layer battery module, while other battery packs use a double-layer heat exchange plate to cool the battery pack.

[0003] However, in the traditional stamped brazed heat exchanger plate structure, the temperature uniformity performance on the side where the battery contacts the flow channel plate is poor, and the heat exchange performance needs to be improved. In addition, complex heat exchange channels need to be set up inside the double-layer heat exchanger plate, which affects the structural strength of the heat exchanger plate. Summary of the invention

[0004] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention proposes a heat exchange plate, which is formed by splicing multiple heat exchange units, and the layout of the heat exchange channels is more regular, which increases the heat exchange area of ​​the heat exchange plate and thus improves the heat exchange performance. The upper and lower contact surfaces of the heat exchange plate are planes, and the structural strength is good.

[0005] According to the first aspect of the present invention, the heat exchange plate comprises: a plurality of heat exchange units extending in a first direction and arranged sequentially in a second direction, two adjacent heat exchange units contact each other and a heat exchange channel is formed between the two adjacent heat exchange units.

[0006] According to the heat exchange plate of the embodiment of the present invention, the heat exchange plate is formed by splicing multiple heat exchange units, and the layout of the heat exchange channels is more regular, which increases the heat exchange area of ​​the heat exchange plate and thus improves the heat exchange performance. The upper and lower contact surfaces of the heat exchange plate are planes, and the plane structure can withstand greater mechanical stress and vibration, and has better structural strength.

[0007] According to some embodiments of the present invention, two adjacent heat exchange units are arranged in opposite directions.

[0008] According to some embodiments of the present invention, the cross-section of the heat exchange channel is triangular.

[0009] According to some embodiments of the present invention, the heat exchange unit includes: a first plate, a second plate and a partition, the first plate and the second plate are arranged on both sides of the partition in a third direction, and the partition is inclined relative to the first plate and the second plate.

[0010] According to some embodiments of the present invention, the first layer plate and the partition of one of the heat exchange units and the first layer plate and the partition of another of the heat exchange units constitute the heat exchange channel; and, the second layer plate and the partition of one of the heat exchange units and the second layer plate and the partition of another of the heat exchange units constitute the heat exchange channel.

[0011] According to some embodiments of the present invention, the dimensions of the first layer board and the second layer board in the third direction are h1, and h1 satisfies the relationship: 1.0 mm≤h1≤2.0 mm.

[0012] According to some embodiments of the present invention, a dimension of the partition in the third direction is h2, and h2 satisfies the relationship: 2.0 mm ≤ h2 ≤ 8.0 mm.

[0013] According to some embodiments of the present invention, the size of the first layer board and the second layer board in the second direction is h3, and h3 satisfies the relationship: 2.0 mm≤h3≤8.0 mm.

[0014] According to some embodiments of the present invention, an edge unit is provided at the edge of the heat exchange plate in the second direction, the heat exchange channel is formed between the edge unit and the adjacent heat exchange unit, and the side of the edge unit away from the heat exchange unit is arc-shaped.

[0015] According to some embodiments of the present invention, two adjacent heat exchange units are bonded or welded to each other.

[0016] According to the splicing tool for heat exchange plates of the second aspect of the embodiment of the present invention, the splicing tool for heat exchange plates is used to assemble the above-mentioned multiple heat exchange units, and the splicing tool for heat exchange plates includes: two positioning toolings, the two positioning toolings are arranged at both ends of the multiple heat exchange units in the first direction, and a crimping tooling, the crimping tooling is pressed on the upper side of the multiple heat exchange units.

[0017] According to some embodiments of the present invention, the positioning tooling includes a plurality of limit grooves and a plurality of limit plates, and the plurality of limit grooves and the plurality of limit plates are arranged in sequence and spaced apart in the second direction, and one end of a part of the plurality of heat exchange units abuts against the limit plate of one of the positioning toolings and the other end is limitedly matched with the limit groove of another positioning tooling.

[0018] According to a third aspect of an embodiment of the present invention, a battery pack comprises: a plurality of battery cells; a plurality of liquid cooling assemblies, wherein the plurality of battery cells and the plurality of liquid cooling assemblies are sequentially spaced apart in a third direction, and the liquid cooling assemblies comprise the above-mentioned heat exchange plate and two collecting pipes, wherein the two collecting pipes are connected at both ends of the heat exchange plate in the first direction.

[0019] According to some embodiments of the present invention, the heat exchange plate is bent at both ends of the first direction.

[0020] An electrical device according to an embodiment of the fourth aspect of the present invention includes the above-mentioned battery pack.

[0021] The beneficial effects of this embodiment are: based on the heat exchange plate formed by splicing multiple heat exchange units, the layout of the heat exchange channel is more regular, the heat exchange performance is better, the upper and lower contact surfaces of the heat exchange plate are planes, the plane structure can withstand greater mechanical stress and vibration, and the structural strength is better. Among them, the heat exchange unit is Z-shaped, and the cross-section of the heat exchange channel formed by splicing the Z-shaped heat exchange unit is triangular. The upper and lower planes can cool the double-layer battery core of the battery pack and meet the requirements of its structural strength and heat exchange performance.

[0022] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which: Figure 1 is a schematic structural diagram of a battery pack according to an embodiment of the present invention; Figure 2 yes Figure 1 A partial schematic diagram in FIG. Figure 3 is a schematic structural diagram of a liquid cooling assembly according to an embodiment of the present invention; Figure 4 is a schematic structural diagram of a heat exchange unit according to an embodiment of the present invention; Figure 5 yes Figure 4 A partial schematic diagram B in FIG. Figure 6 is a schematic structural diagram of a heat exchange plate according to an embodiment of the present invention; Figure 7 yes Figure 6 A partial schematic diagram C in FIG. Figure 8 is a side view of a heat exchange unit according to an embodiment of the present invention; Fig. 9 is a schematic diagram of the structure of the heat exchange plate and the header according to an embodiment of the present invention; Fig.10 is a schematic structural diagram of a heat exchange plate and a splicing tooling according to an embodiment of the present invention; Fig.11 It is a partial schematic diagram of a positioning tool according to an embodiment of the present invention.

[0024] Reference numerals: 100. Battery pack; 10. Battery cells; 20. Liquid cooling assembly; 21. Heat exchange plate; 211. Heat exchange unit; 2111. First layer plate; 2112. Second layer plate; 2113. Partition plate; 212. Edge unit; 213. Heat exchange channel; 22. Collector; 23. Splicing tooling; 231. Positioning tooling; 2311. Limiting groove; 2312. Limiting plate; 232. Crimping tooling; 24. Inlet and outlet joints. DETAILED DESCRIPTION

[0025] Embodiments of the present invention are described in detail below. The embodiments described with reference to the accompanying drawings are exemplary. Embodiments of the present invention are described in detail below.

[0026] Reference below Figure 1-Figure 11 The heat exchange plate 21 according to an embodiment of the present invention is described, and the present invention proposes a splicing tool 23 of the heat exchange plate 21. Furthermore, the present invention proposes a battery pack 100. Furthermore, the present invention also proposes an electrical device.

[0027] Reference Figure 4 and Figure 6-Figure 7 As shown, the heat exchange plate 21 of the embodiment of the present invention includes: a plurality of heat exchange units 211, the heat exchange units 211 extend in a first direction and the plurality of heat exchange units 211 are sequentially arranged in a second direction, two adjacent heat exchange units 211 are in contact with each other, and a heat exchange channel 213 is formed between the two adjacent heat exchange units 211. Specifically, the first direction may be the length direction of the heat exchange plate 21, the second direction may be the width direction of the heat exchange plate 21, the plurality of heat exchange units 211 are arranged in parallel to form the heat exchange plate 21, and the heat exchange channel 213 formed between the two adjacent heat exchange units 211 allows refrigerant to flow, and the refrigerant can play a role in heat transfer and heat exchange.

[0028] Since the heat exchange plate 21 is composed of multiple identical heat exchange units 211, during production, only the basic structural unit, i.e., the heat exchange unit 211, needs to be mass-produced, and then the multiple heat exchange units 211 are spliced ​​together to obtain the heat exchange plate 21, which greatly reduces the complexity of manufacturing and reduces production costs.

[0029] The heat exchange unit 211 can be stamped individually or multiple heat exchange units 211 can be extruded as a group, so the production method is flexible and the splicing is more convenient and quick.

[0030] The size of the heat exchange unit 211 can be determined by parameters such as length, width and height. The heat exchange performance and structural strength of the heat exchange plate 21 are determined by splicing heat exchange units 211 of different sizes. Therefore, it is only necessary to determine the basic structural size parameters of the heat exchange unit 211, and the target heat exchange plate 21 structure can be obtained after splicing, which shortens the design and production cycle of the heat exchange plate 21 and reduces the production cost. If the design or application changes, the heat exchange performance and structure of the heat exchange plate 21 can be quickly adjusted by adding, removing or rearranging the heat exchange units 211 without redesigning the entire heat exchange plate 21.

[0031] Furthermore, if a heat exchange unit 211 fails, only the damaged heat exchange unit 211 needs to be replaced, without replacing the entire heat exchange plate 21, which reduces the difficulty of maintenance and reduces downtime. Moreover, the modular design can limit the problem to a single heat exchange unit 211, preventing the failure from spreading to the entire heat exchange plate 21, and effectively improving the reliability of the heat exchange plate 21.

[0032] Furthermore, one side of the heat exchange unit 211 used for heat exchange is a plane, that is, the upper and lower sides of the heat exchange unit 211 in the thickness direction are planes, and the upper and lower contact surfaces of the heat exchange plate 21 spliced ​​with multiple heat exchange units 211 are also planes. The design of the upper and lower surfaces as planes can ensure that the heat exchange plate 21 is in close contact with the heating element. A good contact surface can reduce the contact thermal resistance, increase the heat exchange area of ​​the heat exchange plate 21, and ensure that heat can be quickly transferred from the heating element to the heat exchange plate 21.

[0033] The planar design means that each heat exchange unit 211 can be evenly distributed on the surface of the battery cell 10 or the heating element, the refrigerant flows more smoothly in the heat exchange channel 213, and the layout of the heat exchange channel 213 is more regular, thereby improving the flow efficiency of the refrigerant and improving the heat exchange performance.

[0034] In addition, the heat exchange plate 21 with flat upper and lower surfaces can provide a more uniform stress structure. After multiple heat exchange units 211 are spliced ​​together, each heat exchange unit 211 can be firmly connected together to form an integral structure. The upper and lower planes enable the heat exchange plate 21 to withstand greater mechanical stress and vibration. It is suitable for environments such as electric vehicles and battery energy storage systems that need to withstand long-term vibration and impact. The heat exchange plate 21 can bear stress on both sides, and the flat design also reduces local stress concentration caused by surface irregularities, thereby reducing the risk of fatigue damage to the heat exchange plate 21 and improving the reliability of the system.

[0035] The heat exchange unit 211 may be made of aluminum alloy or composite material.

[0036] Therefore, based on the heat exchange plate 21 formed by splicing multiple heat exchange units 211, the layout of the heat exchange channel 213 is more regular, the heat exchange area of ​​the heat exchange plate 21 is increased, thereby improving the heat exchange performance. The two surfaces of the heat exchange plate 21 that contact the heating element are flat, and the flat structure can withstand greater mechanical stress and vibration, and has better structural strength.

[0037] Reference Figure 6-Figure 7 As shown, the arrangement directions of two adjacent heat exchange units 211 are opposite, and a heat exchange channel 213 can be formed between the two oppositely arranged heat exchange units 211, so as to fully utilize the space inside the heat exchange plate 21 and improve the heat exchange performance.

[0038] Among them, the cross-section of the heat exchange channel 213 can be a triangle. The triangular cross-section makes the internal structure of the heat exchange plate 21 more stable, thereby improving the structural strength of the heat exchange plate 21. The triangle is a relatively compact geometric shape that can be arranged, so that the number of heat exchange channels 213 is large, the contact area between the refrigerant and the heating element is increased, and the heat exchange efficiency is increased.

[0039] In other embodiments, the cross-section of the heat exchange channel 213 may also be trapezoidal or I-shaped.

[0040] Reference Figure 5-Figure 8 As shown, the heat exchange unit 211 includes: a first plate 2111, a second plate 2112 and a partition 2113. The first plate 2111 and the second plate 2112 are arranged on both sides of the partition 2113 in the third direction, and the partition 2113 is inclined relative to the first plate 2111 and the second plate 2112. In this embodiment, the third direction may be the thickness direction of the heat exchange plate 21, that is, the heat exchange unit 211 may be Z-shaped, and a plurality of Z-shaped heat exchange units 211 are spliced ​​to form the heat exchange plate 21. The upper and lower planes of the Z-shaped heat exchange unit 211 in the thickness direction are in contact with the heating element, and the refrigerant in the internal heat exchange channel 213 exchanges heat with the heating element through two planes.

[0041] The Z-shaped heat exchange unit 211 may be stamped individually or a plurality of heat exchange units 211 may be extruded as a group.

[0042] Reference Figure 7As shown, the first plate 2111 and the partition 2113 of one heat exchange unit 211 and the first plate 2111 and the partition 2113 of another heat exchange unit 211 constitute a heat exchange channel 213. Since the arrangement directions of the two adjacent heat exchange units 211 are opposite, a closed space is formed between the two adjacent partitions 2113 arranged obliquely and the two adjacent first plates 2111. The space can be used for the circulation of refrigerant, namely, the heat exchange channel 213. The cross-section of the heat exchange channel 213 formed by the Z-shaped heat exchange unit 211 is triangular. The two adjacent first plates 2111 are in contact with the heating element, and the contact area is large, which can improve the heat exchange performance and structural strength of the heat exchange plate 21.

[0043] Furthermore, the second plate 2112 and the partition 2113 of one heat exchange unit 211 and the second plate 2112 and the partition 2113 of another heat exchange unit 211 form a heat exchange channel 213, and two adjacent second plates 2112 are in contact with the heating element, so that the contact area between the refrigerant and the heating element is increased.

[0044] Reference Figure 8 As shown, the dimension of the first plate 2111 and the second plate 2112 in the third direction is h1, and h1 satisfies the relationship: 1.0mm≤h1≤2.0mm. The dimension of the first plate 2111 and the second plate 2112 in the third direction is the thickness of the first plate layer and the second plate layer, that is, the thickness of the first plate layer and the second plate layer is not less than 1.0mm and not more than 2.0mm. Within this thickness range, the first plate 2111 and the second plate 2112 can meet the lightweight requirements of the heat exchange plate 21 while ensuring the structural strength and heat exchange performance requirements of the heat exchange plate 21.

[0045] If the thickness of the first plate 2111 and the second plate 2112 is greater than 2.0 mm, the structural strength of the heat exchange plate 21 is enhanced, but the thermal resistance between the refrigerant and the heating element increases, the heat exchange plate 21 is overall heavier, and the heat exchange efficiency is reduced, which cannot meet the lightweight requirements. If the thickness of the first plate 2111 and the second plate 2112 is less than 1.0 mm, the structural strength of the heat exchange plate 21 is insufficient and may not be able to withstand the mechanical pressure on the upper and lower sides, which is prone to quality problems.

[0046] Reference Figure 8 As shown, the dimension of the partition 2113 in the third direction is h2, and h2 satisfies the relationship: 2.0mm≤h2≤8.0mm. The dimension of the partition 2113 in the third direction is the height of the heat exchange channel 213, that is, the height of the heat exchange channel 213 is not less than 2.0mm and not more than 8.0mm. The heat exchange channel 213 within this height range can provide a suitable refrigerant flow rate, and the heat exchange efficiency between the refrigerant and the heating element is good.

[0047] If the height of the heat exchange channel 213 is greater than 8.0 mm, the flow rate of the refrigerant increases, but the contact area between the refrigerant and the heating element is mainly determined by the width of the first plate 2111 and the second plate 2112. Increasing the height of the heat exchange channel 213 alone does not significantly improve the heat exchange performance of the heat exchange plate 21, but more refrigerant is used in a single cycle, resulting in a certain waste of resources. If the height of the heat exchange channel 213 is less than 1.0 mm, it is easy to cause too little refrigerant flow in the heat exchange channel 213, and the refrigerant may not circulate smoothly, affecting the heat exchange effect.

[0048] Reference Figure 8 As shown, the size of the first plate 2111 and the second plate 2112 in the second direction is h3, and h3 satisfies the relationship: 2.0mm≤h3≤8.0mm. The size of the first plate 2111 and the second plate 2112 in the second direction is the width of the first plate 2111 and the second plate 2112, that is, the width of the first plate 2111 and the second plate 2112 is not less than 2.0mm and not more than 8.0mm. Within this range, the first plate 2111 and the second plate 2112 can allow suitable refrigerant to flow in the heat exchange channel 213, and the heat exchange efficiency between the refrigerant and the heating element is good.

[0049] If the width of the first plate 2111 and the second plate 2112 is greater than 8.0 mm, the heat exchange plate 21 does not have sufficient support structure inside, the structural strength is low, and it cannot withstand large mechanical pressure. If the width of the first plate 2111 and the second plate 2112 is less than 2.0 mm, the contact area between the refrigerant and the heating element is too small, the heat exchange efficiency is low, and the heat exchange performance of the heat exchange plate 21 is affected.

[0050] Therefore, the various parameters of the Z-shaped heat exchange unit 211 can be selected according to the heat exchange and strength requirements. For example, when the heat exchange performance of the heat exchange plate 21 is required to be high, the size h3 of the first plate 2111 and the second plate 2112 in the second direction and the size h2 of the partition 2113 in the third direction can be increased to increase the width of the heat exchange channel 213 and the volume of the heat exchange channel 213, thereby improving the heat exchange capacity of the heat exchange plate 21. At the same time, the size h1 of the first plate 2111 and the second plate 2112 in the third direction can be reduced to reduce the thermal resistance caused by the heat exchange plate 21 between the refrigerant and the heating element, thereby improving the heat exchange performance of the heat exchange plate 21.

[0051] For another example, when higher requirements are placed on the structural strength of the heat exchanger plate 21, the dimension h3 of the first plate 2111 and the second plate 2112 in the second direction and the dimension h2 of the partition 2113 in the third direction can be reduced, while increasing the dimension h1 of the first plate 2111 and the second plate 2112 in the third direction to increase the density of the unit structure of the heat exchanger plate 21 and enhance the structural strength of the heat exchanger plate 21.

[0052] The parameterized design can simplify the design process of the heat exchange plate 21 and the cold plate manufacturing process, shorten the design and manufacturing cycle of the heat exchange plate 21 and reduce the cost of the heat exchange plate 21.

[0053] Reference Figure 1-Figure 2 As shown, the heat exchange plate 21 is provided with an edge unit 212 at the edge in the second direction, a heat exchange channel 213 is formed between the edge unit 212 and the adjacent heat exchange unit 211, and the side of the edge unit 212 away from the heat exchange unit 211 is arc-shaped. That is, the edge unit 212 can be provided at the edge of the heat exchange plate 21, and the edge unit 212 is connected to the upper and lower planes to prevent the refrigerant from leaking from the edge, and the side of the edge unit 212 away from the heat exchange unit 211 is arc-shaped, so that the edge of the heat exchange plate 21 is smoothly transitioned, stress concentration is reduced, flow resistance is reduced, and safety is improved.

[0054] Likewise, the edge unit 212 may also remain in a Z-shape, without adding any production steps, thereby improving production efficiency and reducing production costs.

[0055] Furthermore, two adjacent heat exchange units 211 are bonded or welded to each other. The bonding process is relatively simple and convenient to operate. It does not require complex equipment and professional techniques, and can quickly complete the assembly, thereby improving production efficiency. The bonding method can absorb vibration and reduce stress concentration at the connection part, which helps to reduce fatigue damage of the heat exchange plate 21 and increase the service life of the equipment.

[0056] The heat exchange unit 211 connected by welding has high strength and stability, which helps to maintain stability under high pressure and vibration environment. The welding penetration depth usually does not exceed 10% of the thickness of the workpiece, and the part of the weld higher than the plane needs to be polished clean.

[0057] Reference Fig.11 As shown, according to the splicing tool 23 of the heat exchange plate 21 of the second embodiment of the present invention, the splicing tool 23 of the heat exchange plate 21 is used to assemble the above-mentioned multiple heat exchange units 211, and the splicing tool 23 of the heat exchange plate 21 includes: two positioning tool 231 and a crimping tool 232. The two positioning tool 231 are arranged at both ends of the multiple heat exchange units 211 in the first direction. The positioning tool 231 can arrange and position the Z-shaped heat exchange unit 211 in the length direction. The crimping tool 232 is pressed on the upper side of the multiple heat exchange units 211. The crimping tool 232 presses the positioned heat exchange unit 211 in the width direction to ensure the flatness of both sides of the Z-shaped heat exchange plate 21.

[0058] Reference Figure 10-11As shown, the positioning fixture 231 includes a plurality of limiting grooves 2311 and a plurality of limiting plates 2312, and the plurality of limiting grooves 2311 and the plurality of limiting plates 2312 are sequentially arranged at intervals in the second direction, and one end of a part of the plurality of heat exchange units 211 abuts against a limiting plate 2312 of one of the positioning fixtures 231 and the other end is limitedly matched with a limiting groove 2311 of another positioning fixture 231. Specifically, the plurality of limiting grooves 2311 and the plurality of limiting plates 2312 are sequentially arranged at intervals in the width direction, and the number of limiting grooves 2311 and limiting plates 2312 is determined by the number of heat exchange units 211. Among them, the limiting grooves 2311 are used to limit the positions of the plurality of heat exchange units 211 in the width direction, and the limiting plates 2312 are used to limit the positions of the plurality of heat exchange units 211 in the length direction.

[0059] Furthermore, the positioning fixtures 231 located on both sides of the length direction of the multiple heat exchange units 211 are staggered with each other, that is, the limiting groove 2311 on one side corresponds to the limiting plate 2312 on the other side, and the limiting plate 2312 on one side corresponds to the limiting groove 2311 on the other side. This ensures that the heat exchange unit 211 can be positioned in both the width direction and the length direction, thereby improving the reliability of the system.

[0060] Reference Figure 1-Figure 2 As shown, the battery pack 100 according to the embodiment of the third aspect of the present invention includes: a plurality of battery cells 10 and a plurality of liquid cooling components 20, and the plurality of battery cells 10 and the plurality of liquid cooling components 20 are sequentially spaced in the third direction. Specifically, the liquid cooling component 20 can be sandwiched between two battery cells 10 to cool the battery cells 10 on both sides of the liquid cooling component 20, so that the temperature uniformity on both sides can be ensured to avoid uneven heat dissipation inside the battery pack 100. The battery pack 100 is composed of a plurality of battery cells 10 and a plurality of liquid cooling components 20, and a liquid cooling component 20 is sandwiched between every two battery cells 10, which can effectively reduce the temperature of the battery pack 100, prevent the battery pack 100 from overheating, and provide a better user experience.

[0061] The liquid cooling assembly 20 includes a heat exchange plate 21 and two headers 22. The two headers 22 are connected at both ends of the heat exchange plate 21 in the first direction, that is, the two headers 22 are connected at both ends of the length direction of the heat exchange plate 21. The headers 22 are provided with grooves matching the heat exchange plate 21. The middle of the headers 22 is provided with inlet and outlet joints 24 of the heat exchange plate 21 for the coolant to flow in or out. The ends of the heat exchange plate 21 are welded to the two headers 22 respectively, and the coolant can flow into each heat exchange channel 213 in the heat exchange plate 21 through the headers 22 to exchange heat with the battery cells 10.

[0062] Reference Figure 3 and Fig. 9 As shown, the heat exchange plate 21 is bent at both ends in the first direction to match with the grooves in the header 22 to allow the refrigerant to flow in.

[0063] An electrical device according to an embodiment of the fourth aspect of the present invention includes the above-mentioned battery pack 100.

[0064] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations 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 referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0065] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example.

[0066] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A heat exchange plate, characterized in that: include: A plurality of heat exchange units are provided, wherein the heat exchange units extend in a first direction and are arranged in sequence in a second direction, two adjacent heat exchange units are in contact with each other and a heat exchange channel is formed between the two adjacent heat exchange units.

2. The heat exchange plate according to claim 1, characterized in that: The arrangement directions of two adjacent heat exchange units are opposite.

3. The heat exchange plate according to claim 1, characterized in that: The cross section of the heat exchange channel is triangular.

4. The heat exchange plate according to claim 1, characterized in that: The heat exchange unit includes: a first plate, a second plate and a partition plate, wherein the first plate and the second plate are arranged on both sides of the partition plate in a third direction, and the partition plate is inclined relative to the first plate and the second plate.

5. The heat exchange plate according to claim 4, characterized in that: The first layer plate and the partition plate of one of the heat exchange units and the first layer plate and the partition plate of another heat exchange unit constitute the heat exchange channel; and, The second layer plate and the partition plate of one of the heat exchange units and the second layer plate and the partition plate of another heat exchange unit form the heat exchange channel.

6. The heat exchange plate according to claim 4, characterized in that: The dimensions of the first layer board and the second layer board in the third direction are h1, and h1 satisfies the relationship: 1.0 mm≤h1≤2.0 mm.

7. The heat exchange plate according to claim 4, characterized in that: The dimension of the partition in the third direction is h2, and h2 satisfies the relationship: 2.0mm≤h2≤8.0mm.

8. The heat exchange plate according to claim 4, characterized in that: The size of the first layer board and the second layer board in the second direction is h3, and h3 satisfies the relationship: 2.0 mm≤h3≤8.0 mm.

9. The heat exchange plate according to claim 1, characterized in that: The heat exchange plate is provided with an edge unit at the edge in the second direction, the heat exchange channel is formed between the edge unit and the adjacent heat exchange unit, and the side of the edge unit away from the heat exchange unit is arc-shaped.

10. The heat exchange plate according to claim 1, characterized in that: Two adjacent heat exchange units are bonded or welded to each other.

11. A heat exchange plate splicing tool, characterized in that: The heat exchange plate splicing tool is used to assemble a plurality of heat exchange units according to any one of claims 1 to 10, and the heat exchange plate splicing tool comprises: Two positioning fixtures, the two positioning fixtures are arranged at two ends of the plurality of heat exchange units in the first direction, A crimping tool is pressed on the upper side of the plurality of heat exchange units.

12. The heat exchange plate splicing tool according to claim 11, characterized in that: The positioning tooling includes a plurality of limit grooves and a plurality of limit plates, and the plurality of limit grooves and the plurality of limit plates are arranged in sequence and spaced apart in the second direction, one end of a part of the plurality of heat exchange units abuts against the limit plate of one of the positioning toolings and the other end is limitedly matched with the limit groove of another positioning tooling.

13. A battery pack, characterized in that: include: Multiple cells; A plurality of liquid cooling components, wherein the plurality of battery cells and the plurality of liquid cooling components are sequentially spaced apart in a third direction, wherein the liquid cooling components comprise: a heat exchange plate as described in any one of claims 1 to 10 and two collecting pipes, wherein the two collecting pipes are connected at both ends of the heat exchange plate in the first direction.

14. The battery pack according to claim 13, characterized in that: The heat exchange plate is bent at two ends in the first direction.

15. An electrical equipment, characterized in that: include: The battery pack according to any one of claims 13-14.

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