Heat exchange plate, battery pack and electric device

Abstract

The utility model provides a kind of heat exchange plate, battery pack and electric device, it is applied to battery production technical field, heat exchange plate includes heat exchange plate main body and liquid collecting part, liquid collecting part is set to one end of heat exchange plate main body, and it is communicated with heat exchange plate main body;Multiple flow channel partition plates are arranged inside heat exchange plate main body along Y direction, among them, Y direction is the arrangement direction of flow channel partition plate, flow channel for heat exchange medium to pass through is formed between every adjacent two flow channel partition plates;Liquid collecting part includes liquid collecting cavity, first baffle and second baffle are at least interval arranged in liquid collecting cavity along Y direction, and the projection of adjacent first baffle and second baffle along Y direction at least partially coincides;The projection of every adjacent one first baffle and one second baffle along Y direction does not coincide area S1mm 2 , the total area of every adjacent one first baffle and one second baffle is S2mm 2 , and the ratio of S1 / S2 is 0.2~0.8.The heat exchange plate can reduce water flow noise and reduce abnormal sound.

Description

Technical Field

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

[0002] With the rapid development of new energy technologies, battery devices, as core energy storage components, are widely used in electric vehicles, energy storage power stations, and many other fields. A battery device typically consists of a casing and multiple individual battery cells housed within it. These individual cells continuously generate heat during charging and discharging. If this heat cannot be dissipated in time, the temperature of the individual cells will become excessively high. This not only reduces the charging and discharging performance of the battery device but also accelerates the aging of the individual cells. In severe cases, it may even pose safety hazards, significantly impacting the lifespan and overall reliability of the battery device.

[0003] To address the heat dissipation problem of the aforementioned battery cells, existing technologies typically install heat exchange plates and liquid collection sections inside the casing. Heat exchange medium flows through the heat exchange plates and enters the liquid collection section. Through heat transfer between the liquid collection section and the battery cells, the battery cells are cooled down.

[0004] However, in practical applications, when the heat exchange medium in the heat exchange plate enters the liquid collection section, the medium directly impacts the inner wall of the liquid collection section. Since the liquid collection section has a large internal cavity, the flow state of the medium changes drastically after flowing from the cold plate into the liquid collection section, easily forming turbulence and exhibiting a disordered and irregular flow state. This turbulence phenomenon will cause significant water flow noise, making the battery device prone to abnormal noise during operation. This not only affects the user experience but may also cause users to misjudge the operating status of the battery device. Utility Model Content

[0005] In view of this, the purpose of this utility model is to provide a heat exchange plate that can reduce water flow noise and abnormal noise, which can not only improve the user's user experience, but also prevent the user from misjudging the operating status of the battery pack.

[0006] Another objective of this invention is to provide a battery pack.

[0007] Another objective of this invention is to provide an electrical device.

[0008] To achieve the above objectives, this utility model provides the following technical solution:

[0009] A heat exchange plate, characterized in that it includes a heat exchange plate body and a liquid collection part, wherein the liquid collection part is disposed at one end of the heat exchange plate body and is connected to the heat exchange plate body;

[0010] The heat exchange plate body has multiple flow channel partition plates arranged along the Y direction inside, and the Y direction is the arrangement direction of the flow channel partition plates. A flow channel for the heat exchange medium to pass through is formed between each two adjacent flow channel partition plates.

[0011] The liquid collection section includes a liquid collection cavity, in which at least a first partition and a second partition are spaced apart along the Y direction, and the projections of adjacent first partitions and second partitions along the Y direction at least partially overlap.

[0012] The non-overlapping area of ​​the projections of each adjacent first partition and second partition along the Y direction is S1mm. 2 The total area of ​​each adjacent first partition and second partition is S² mm. 2 The ratio of S1 / S2 is 0.2 to 0.8;

[0013] The liquid collecting section is provided with an inlet and an outlet, and at least one first baffle and / or at least one second baffle are provided on the flow path from the inlet to the outlet. The liquid collecting section is connected to the heat exchange plate body through the inlet, the outlet and the heat exchange plate body.

[0014] As can be seen from the above technical solution, when the battery pack is liquid-cooled, the heat exchange medium first enters the liquid collection section through the inlet from the flow channel of the heat exchange plate body. Then, after passing through the spaced first and second baffles in the liquid collection section, it flows back to the flow channel of the heat exchange plate body from the outlet. When the heat exchange medium flows in the liquid collection chamber, the staggered first and second baffles guide and buffer the heat exchange medium, thereby reducing water flow noise and abnormal sounds. This not only improves the user experience but also prevents users from misjudging the operating status of the battery pack. Specifically, this is reflected in the following two aspects:

[0015] 1) The adjacent first and second partitions are staggered and their projections along the Y direction at least partially overlap, which makes it impossible for the heat exchange medium to flow directly through the liquid collection chamber. It must flow around the gap between the first and second partitions, thus lengthening the path of the heat exchange medium in the liquid collection chamber, reducing the flow velocity fluctuation of the heat exchange medium, reducing water flow noise, and reducing abnormal noise.

[0016] 2) The area where the projections of each adjacent first partition and second partition along the Y direction do not overlap is S1mm. 2 The total area of ​​each adjacent first partition and second partition is S2mm. 2The ratio of S1 / S2 is 0.2 to 0.8. This ratio directly affects the flow resistance of the heat exchange medium and the noise level of the water flow. When the ratio of S1 / S2 is too large, the resistance of the heat exchange medium flowing in the liquid collection chamber will be small, but the water flow noise and abnormal noise may still be very large. When the ratio of S1 / S2 is too small, the resistance of the heat exchange medium in the liquid collection chamber will be too large, thereby affecting the flow rate of the heat exchange medium in the liquid collection chamber and affecting the heat exchange efficiency. The S1 / S2 ratio setting disclosed in this embodiment can not only reduce water flow noise and abnormal noise, but also ensure heat exchange efficiency. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the external structure of the heat exchange plate disclosed in the embodiment of this utility model;

[0019] Figure 2 for Figure 1 Top view;

[0020] Figure 3 for Figure 1 A bottom view;

[0021] Figure 4 This is a schematic diagram of the internal structure of the heat exchange plate disclosed in the first embodiment of this utility model;

[0022] Figure 5 for Figure 4 Top view;

[0023] Figure 6 This is a schematic diagram of the internal structure of the heat exchange plate disclosed in the second embodiment of this utility model;

[0024] Figure 7 for Figure 6 Top view.

[0025] Explanation of reference numerals in the attached figures:

[0026] 100-Heat exchange plate, 101-Heat exchange plate body, 102-Flow channel partition plate, 103-Flow channel, 104-Liquid collection part, 1041-Liquid collection chamber, 1042-First wall, 1043-Second wall, 1044-First partition, 1045-Second partition. Detailed Implementation

[0027] In view of this, the core of this utility model is to provide a heat exchange plate that can reduce water flow noise and abnormal noise, which can not only improve the user's user experience, but also prevent the user from misjudging the operating status of the battery pack.

[0028] Another key aspect of this invention is that it provides a battery pack.

[0029] Another core aspect of this utility model is that it provides an electrical device.

[0030] 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. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0031] First, the relevant terms and concepts appearing in the following text will be explained:

[0032] A battery is a device that stores chemical energy and converts it into electrical energy in a controllable manner. In a recyclable battery, the active materials can be reactivated by charging after discharge so that the battery can continue to be used. A battery includes a casing and a cell housed inside the casing.

[0033] A heat exchange plate is a component used to regulate battery temperature. The heat exchange plate has internal heat exchange channels for the flow of heat exchange medium. The heat exchange medium can be gas (air), liquid (such as water, alcohol, refrigerant, oil, etc.), or solid (such as thermally conductive adhesive, thermally conductive solder paste, etc.). The heat exchange channel has an inlet and an outlet for the heat exchange medium. The heat exchange medium can enter the heat exchange channel through the inlet, exchange heat with the battery cells, and then exit through the outlet, thus realizing heat exchange between the battery cells.

[0034] The heat exchange plate can exchange heat with the battery cell. The heat exchange plate can be made of materials with high thermal conductivity, such as copper. Alternatively, the heat exchange plate can be equipped with heat pipes, which can quickly transfer heat through the principle of heat convection. Or, the heat exchange plate can be equipped with channels that connect to heating or cooling devices, and liquid media can flow in the channels, allowing for efficient heat exchange.

[0035] The heat exchange plate includes a heating element and an electrical connector. The heating element can be a heating wire, a heating film, or a heating plate. This application does not impose any restrictions.

[0036] The heat exchange plate can be made of metal materials, such as aluminum alloy or magnesium alloy; or it can be made of plastic.

[0037] Battery Devices: Definition / Function: Battery devices can serve as the operating power source for electrical devices, or as the driving power source for electrical devices, replacing or partially replacing fuel or natural gas to provide driving power for vehicles. Electrical devices include: energy storage devices, electric ships, aircraft, laptops, power tools, electric bicycles, electric motorcycles, electric cars, military equipment, aerospace, and many other technological fields.

[0038] Materials / Composition: (1) The battery device includes multiple battery packs, which can be connected in series, parallel, or mixed. Mixed connection means that multiple battery packs are connected in both series and parallel. (2) The battery device is a cluster-level battery structure formed by multiple battery packs connected in series, wherein the number of battery packs in each cluster is strictly configured according to voltage and capacity requirements. Specifically, the battery unit of the battery device includes multiple batteries, and some of the batteries are connected in series to form a cluster that meets the preset power supply voltage requirements. At least one spare battery among the multiple batteries is bypassed. (3) The battery device may include: battery units and switching control units.

[0039] Please refer to Figures 1 to 7 The heat exchange plate 100 disclosed in this embodiment of the present invention includes a heat exchange plate body 101 and a liquid collection part 104. The liquid collection part 104 is disposed at one end of the heat exchange plate body 101 and is connected to the heat exchange plate body 101.

[0040] The heat exchange plate body 101 has multiple flow channel partition plates 102 arranged along the Y direction inside, where the Y direction is the arrangement direction of the flow channel partition plates 102. A flow channel 103 for the heat exchange medium to pass through is formed between each two adjacent flow channel partition plates 102. The liquid collection part 104 includes a liquid collection chamber 1041, in which at least a first partition plate 1044 and a second partition plate 1045 are arranged at intervals along the Y direction, and the projections of adjacent first partition plates 1044 and second partition plates 1045 along the Y direction at least partially overlap. The non-overlapping area of ​​the projections of each adjacent first partition plate 1044 and second partition plate 1045 along the Y direction is S1 mm. 2 The total area of ​​each adjacent first partition 1044 and second partition 1045 is S2mm. 2 The ratio of S1 / S2 is 0.2 to 0.8; the liquid collection section is provided with an inlet and an outlet, and at least one first baffle 1044 and / or at least one second baffle 1045 are provided on the flow path from the inlet to the outlet. The liquid collection section is connected to the heat exchange plate body 101 through the inlet, the outlet and the heat exchange plate body 101.

[0041] The ratio of S1 / S2 can be specifically 0.2, 0.3, 0.5, or 0.8.

[0042] When the battery pack is liquid cooled, the heat exchange medium first enters the liquid collection section 104 through the inlet of the flow channel 103 of the heat exchange plate body 101. Then, within the liquid collection section 104, it passes through the spaced first baffle 1044 and second baffle 1045 and flows back to the flow channel 103 of the heat exchange plate body 101 through the outlet. When the heat exchange medium flows within the liquid collection chamber 1041, the staggered first baffle 1044 and second baffle 1045 guide and buffer the heat exchange medium, thereby reducing water flow noise and abnormal sounds. This not only improves the user experience but also prevents users from misjudging the operating status of the battery pack. Specifically, this is reflected in the following two aspects:

[0043] 1) The adjacent first partition 1044 and second partition 1045 are staggered and their projections along the Y direction at least partially overlap, so that the heat exchange medium cannot pass directly through the liquid collection chamber 1041 in a straight line, but must flow around the gap between the first partition 1044 and the second partition 1045. Therefore, the path of the heat exchange medium in the liquid collection chamber 1041 is lengthened, the flow velocity fluctuation of the heat exchange medium is reduced, the water flow noise is reduced, and abnormal noise is reduced.

[0044] 2) The area where the projections of each adjacent first partition 1044 and second partition 1045 along the Y direction do not overlap is S1mm. 2 The total area of ​​each adjacent first partition 1044 and second partition 1045 is S2mm. 2 The ratio of S1 / S2 is 0.2 to 0.8. This ratio directly affects the flow resistance of the heat exchange medium and the noise level of the water flow. When the ratio of S1 / S2 is too large, the resistance of the heat exchange medium in the liquid collection chamber 1041 will be small, but the water flow noise and abnormal noise may still be very large. When the ratio of S1 / S2 is too small, the resistance of the heat exchange medium in the liquid collection chamber 1041 will be too large, thereby affecting the flow rate of the heat exchange medium in the liquid collection chamber 1041 and affecting the heat exchange efficiency. The setting of the S1 / S2 ratio disclosed in this embodiment of the present invention can not only reduce water flow noise and abnormal noise, but also ensure heat exchange efficiency.

[0045] As a specific embodiment, the S1mm disclosed in this utility model embodiment 2 The range is 60mm 2 -500mm 2 , and / or S2mm 2 The range is 100mm 2 -800mm 2 For example, S1mm 2 Specifically, it can be 60mm², 165mm², 270mm², 375mm², 500mm², or S2mm. 2Specifically, it can be 100mm², 275mm², 450mm², 625mm², or 800mm².

[0046] As a further embodiment, the liquid collection cavity 1041 disclosed in this utility model embodiment includes at least a first wall 1042, wherein the first wall 1042 is the side wall of the liquid collection cavity 1041 away from the flow channel 103, and a first partition 1044 is disposed on the first wall 1042.

[0047] This embodiment of the utility model does not limit the specific location of the second partition 1045 in the liquid collection cavity 1041. Any structure that meets the usage requirements of this utility model is within the protection scope of this utility model.

[0048] As an embodiment of this utility model, the liquid collecting chamber 1041 disclosed in this embodiment further includes a second wall 1043, wherein the second wall 1043 is the side wall of the liquid collecting chamber 1041 near the flow channel 103 and is disposed opposite to the first wall 1042, wherein the second partition 1045 is connected to the second wall 1043. This structural arrangement allows the heat exchange medium to flow through the gap between the first partition 1044 and the second wall 1043, and the gap between the second partition 1045 and the first wall 1042 after entering the liquid collecting chamber 1041. This structure can extend the path of the heat exchange medium in the liquid collecting chamber 1041, reduce the flow velocity fluctuation of the heat exchange medium, reduce water flow noise, and reduce abnormal noise.

[0049] As another embodiment of this utility model, the liquid collecting cavity 1041 disclosed in this embodiment further includes a second wall 1043, wherein the second wall 1043 is the side wall of the liquid collecting cavity 1041 near the flow channel 103 and is disposed opposite to the first wall 1042, wherein there is a gap between the second partition 1045 and the second wall 1043, and the second partition 1045 is disposed on the top wall or bottom wall of the liquid collecting cavity 1041. This structural arrangement allows the heat exchange medium to flow not only through the gap between the first partition 1044 and the second wall 1043 after entering the liquid collecting cavity 1041, but also through the gap between the second partition 1045 and the first wall 1042, and the gap between the second partition 1045 and the second wall 1043. Compared with the above embodiment, this structural arrangement further extends the path of the heat exchange medium in the liquid collecting cavity 1041, further reduces the flow velocity fluctuation of the heat exchange medium, reduces water flow noise, and reduces abnormal noise.

[0050] It should be noted that the first partition 1044 and the second partition 1045 disclosed in this embodiment of the present invention are multiple, and are arranged alternately along the Y direction. With this arrangement, when the heat exchange medium enters the liquid collection chamber 1041, it needs to flow continuously around the alternating first partition 1044 and second partition 1045 along the Y direction, which further extends the flow path, thereby further reducing water flow noise and reducing abnormal noise.

[0051] This utility model embodiment does not limit the specific arrangement of the first partition 1044 and the second partition 1045. Any structure that meets the usage requirements of this utility model is within the protection scope of this utility model.

[0052] In one embodiment, the first partition 1044 of this utility model extends along the X direction to the first centerline of the liquid collection cavity 1041, and the second partition 1045 extends along the X direction past the first centerline of the liquid collection cavity 1041, wherein the X direction is the extension direction parallel to the flow channel. With this arrangement, the first partition 1044 extends to the first centerline of the liquid collection cavity 1041, that is, at half the width of the liquid collection cavity 1041 along the X direction, while the second partition 1045 extends past the first centerline. This structure facilitates the S-shaped flow of the heat exchange medium within the liquid collection cavity 1041.

[0053] As a further embodiment, the length of the second partition 1045 exceeding the center line of the liquid collection cavity 1041 disclosed in this utility model embodiment is 1mm-80mm. For example, the length of the second partition 1045 exceeding the center line of the liquid collection cavity 1041 can be specifically 1mm, 21mm, 41mm, 61mm, or 80mm.

[0054] It should be noted that the length of the second partition 1045 beyond the first center line directly determines the projected overlapping area with the first partition 1044. The greater the length of the second partition 1045 beyond the first center line of the liquid collection cavity 1041, the larger the overlapping area between the two, and the non-overlapping area S1mm. 2 The smaller the value of S1 / S2, the lower the ratio and the greater the flow resistance; conversely, the larger the value of S1 / S2, the smaller the flow resistance. Therefore, the setting of the length of the second partition 1045 exceeding the first center line of the liquid collection chamber 1041 disclosed in this embodiment of the present invention will not affect the flow resistance, and will also reduce the noise and abnormal sounds of the heat exchange medium entering the liquid collection chamber 1041.

[0055] In another embodiment, the first partition 1044 of this utility model extends along the X direction past the first centerline of the liquid collecting cavity 1041, and the second partition 1045 extends along the X direction to the first centerline of the liquid collecting cavity 1041, wherein the X direction is parallel to the flow channel 103. With this arrangement, the second partition 1045 extends to the first centerline, that is, along the X direction, at half the width of the liquid collecting cavity 1041, while the first partition 1044 extends past the first centerline. This structure also facilitates the S-shaped flow of the heat exchange medium within the liquid collecting cavity 1041.

[0056] As a further embodiment, the length of the first partition 1044 exceeding the first center line of the liquid collection cavity 1041 disclosed in this utility model embodiment is 1mm-80mm. For example, the length of the first partition 1044 exceeding the first center line of the liquid collection cavity 1041 can be specifically 5mm, 20mm, 40mm, 60mm, or 80mm.

[0057] It should be noted that the length of the first partition 1044 beyond the first center line directly determines the projected overlapping area with the first partition 1044. The greater the length of the first partition 1044 beyond the first center line of the liquid collection cavity 1041, the larger the overlapping area between the two, and the non-overlapping area S1mm. 2 The smaller the value of S1 / S2, the lower the ratio and the greater the flow resistance; conversely, the larger the value of S1 / S2, the smaller the flow resistance. Therefore, the setting of the length of the first partition 1044 exceeding the first center line of the liquid collection chamber 1041 disclosed in this embodiment of the present invention will not affect the flow resistance, and will also reduce the noise and abnormal sounds when the heat exchange medium enters the liquid collection chamber 1041.

[0058] This embodiment of the utility model does not specifically limit the thickness of the first partition 1044 and the second partition 1045. As long as the thickness meets the requirements of this utility model, it is within the protection scope of this utility model.

[0059] As a specific embodiment, the thickness of the first partition 1044 disclosed in this utility model embodiment is 1mm-20mm, and / or the thickness of the second partition 1045 is 1mm-20mm. For example, the thickness of the first partition 1044 can be specifically 1mm, 6mm, 11mm, 16mm, or 20mm; the thickness of the second partition 1045 can be specifically 2mm, 5mm, 10mm, 15mm, or 20mm.

[0060] In this embodiment of the invention, the first partition 1044 can be connected to the bottom wall of the liquid collecting cavity 1041, with a gap between it and the top wall of the liquid collecting cavity 1041; the first partition 1044 can also be connected to the top wall of the liquid collecting cavity 1041, with a gap between it and the bottom wall of the liquid collecting cavity 1041; the first partition 1044 can also be located in the middle of the liquid collecting cavity 1041, with gaps between it and both the top and bottom walls of the liquid collecting cavity 1041; or the first partition 1044 can be connected to both the top and bottom walls of the liquid collecting cavity 1041 without gaps. When the first partition 1044 is selected with different thicknesses, those skilled in the art can choose to set the first partition 1044 at different positions on the first wall 1042 according to the actual situation.

[0061] Similarly, the second partition 1045 can be connected to the bottom wall of the liquid collecting cavity 1041, with a gap between it and the top wall of the liquid collecting cavity 1041; the second partition 1045 can also be connected to the top wall of the liquid collecting cavity 1041, with a gap between it and the bottom wall of the liquid collecting cavity 1041; the second partition 1045 can also be located in the middle of the liquid collecting cavity 1041, with gaps between it and both the top and bottom walls of the liquid collecting cavity 1041; or the second partition 1045 can be connected to both the top and bottom walls of the liquid collecting cavity 1041 without gaps. When the second partition 1045 is selected with different thicknesses, those skilled in the art can choose to set the first partition 1044 at different positions on the second wall 1043 according to the actual situation.

[0062] Thickness is a key parameter that determines the strength of the first partition 1044 and the second partition 1045. Technicians can set the thickness values ​​of the first partition 1044 and the second partition 1045 according to actual needs, thereby achieving an optimized balance between structural stability and lightweighting.

[0063] This embodiment of the utility model does not limit the specific setting method of the first partition 1044. Any setting method that meets the usage requirements of this utility model is within the protection scope of this utility model.

[0064] As one embodiment, please refer to the following for details. Figure 4 and Figure 5 In this embodiment of the invention, the first partition plate 1044 and the flow channel partition plate 102 are disposed opposite to each other, and the centerline of the first partition plate 1044 coincides with the centerline of the flow channel partition plate 102. Both the centerline of the first partition plate 1044 and the centerline of the flow channel partition plate 102 are parallel to the extending direction of the flow channel 103. This arrangement effectively reduces energy loss and eddies caused by fluid impacting the sidewall of the liquid collection chamber, thereby improving fluid distribution efficiency and stability.

[0065] As another embodiment, please refer to the following for details. Figure 6 and Figure 7 In this embodiment of the invention, the centerline of the first baffle 1044 is offset from the centerline of the flow channel partition 102, wherein both the centerline of the first baffle 1044 and the centerline of the flow channel partition 102 are parallel to the extension direction of the flow channel 103. As another configuration, the first baffle 1044 can further improve the uniformity of flow distribution and the stability of operation.

[0066] As a further embodiment, the centerline of the first partition 1044 disclosed in this embodiment is located at a distance of 1 / 3 to 2 / 3 offset from the centerline of the flow channel partition 102. This setting range can achieve the most significant heat transfer enhancement effect with minimal increase in pressure loss in the liquid collection chamber 1041, thereby achieving the best balance between performance and energy consumption.

[0067] For example, the first baffle 1044 may be positioned at a distance of 5 / 12, 1 / 2, or 7 / 12 from the flow channel baffle 102.

[0068] This embodiment of the utility model does not limit the specific setting method of the second partition 1045. Any setting method that meets the usage requirements of this utility model is within the protection scope of this utility model.

[0069] In one embodiment, the centerline of the second partition 1045 disclosed in this utility model coincides with the centerline of the flow channel partition 102, and both the centerline of the second partition 1045 and the centerline of the flow channel partition 102 are parallel to the extending direction of the flow channel 103. This arrangement effectively reduces energy loss and eddies caused by fluid impacting the sidewall of the liquid collection chamber, thereby improving fluid distribution efficiency and stability.

[0070] In another embodiment, the centerline of the second baffle 1045 disclosed in this utility model embodiment is offset from the centerline of the flow channel partition 102, wherein both the centerline of the second baffle 1045 and the centerline of the flow channel partition 102 are parallel to the extension direction of the flow channel 103. This alternative arrangement of the second baffle 1045 can further enhance the uniformity of flow distribution and the stability of operation.

[0071] As a further embodiment, the centerline of the second baffle 1045 disclosed in this embodiment is located at a position 1 / 5 to 2 / 5 of the distance from the centerline of the flow channel partition 102. This positioning range can achieve the most significant heat transfer enhancement effect with minimal increase in pressure loss in the liquid collection chamber 1041, thereby achieving the best balance between performance and energy consumption. For example, the second baffle 1045 can be located at a position 3 / 10, 7 / 20, or 1 / 4 of the distance from the flow channel partition 102.

[0072] In another specific embodiment of this utility model, the first partition 1044 disclosed in this embodiment is disposed on the top wall of the liquid collecting cavity 1041 and extends towards the bottom wall of the liquid collecting cavity 1041 along the Z direction; the second partition 1045 is disposed on the bottom wall of the liquid collecting cavity 1041 and extends towards the top wall of the liquid collecting cavity 1041 along the Z direction, wherein the Z direction is a direction perpendicular to both the X and Y directions. With this arrangement, the first partition 1044 extends downward from the top wall of the liquid collecting cavity 1041, and the second partition 1045 extends upward from the bottom wall of the liquid collecting cavity 1041. The two partitions overlap and intersect in the Z direction, blocking the straight flow path of the heat exchange medium in the Z direction. When the heat exchange medium enters the liquid collecting cavity 1041, it must pass through the overlapping area of ​​the first partition 1044 and the second partition 1045 in the Z direction, while continuing to flow in the Y direction.

[0073] In another specific embodiment of this utility model, the first partition 1044 disclosed in this embodiment is disposed on the bottom wall of the liquid collecting cavity 1041 and extends towards the top wall of the liquid collecting cavity 1041 along the Z direction; the second partition 1045 is disposed on the top wall of the liquid collecting cavity 1041 and extends towards the top wall of the liquid collecting cavity 1041 along the Z direction, wherein the Z direction is a direction perpendicular to both the X and Y directions. With this arrangement, the first partition 1044 extends upward from the bottom wall of the liquid collecting cavity 1041, and the second partition 1045 extends downward from the top wall of the liquid collecting cavity 1041. The two partitions overlap in the Z direction, blocking the straight flow path of the heat exchange medium in the Z direction. When the heat exchange medium enters the liquid collecting cavity 1041, it must pass through the overlapping area of ​​the first partition 1044 and the second partition 1045 in the Z direction, while continuing to flow in the Y direction.

[0074] In one specific embodiment, the first partition 1044 of this utility model extends to the second center line of the liquid collection cavity 1041, and the second partition 1045 extends along the Z direction past the second center line of the liquid collection cavity 1041. With this arrangement, the first partition 1044 extends along the Z direction to 1 / 2 of the height of the liquid collection cavity 1041, and the second partition 1045 extends past the second center line of the liquid collection cavity 1041. Thus, the first partition 1044 and the second partition 1045 form an interlaced structure along the Z direction in the liquid collection cavity 1041.

[0075] As a further embodiment, the length of the second partition 1045 exceeding the center line of the liquid collection cavity 1041 disclosed in this utility model embodiment is 1mm-80mm. For example, the length of the second partition 1045 exceeding the center line of the liquid collection cavity 1041 can specifically be 5mm, 25mm, 45mm, 65mm, or 80mm.

[0076] The greater the length of the second partition 1045 extending beyond the centerline of the liquid collecting cavity 1041 along the Z direction, the larger the overlapping area between the two, and the smaller the non-overlapping area S1mm. 2 The smaller the value, the lower the S1 / S2 ratio, and the greater the flow resistance; conversely, the larger the value, the smaller the flow resistance.

[0077] In another specific embodiment, the first partition 1044 of this utility model extends beyond the second centerline of the liquid collecting cavity 1041, and the second partition 1045 extends to the second centerline of the liquid collecting cavity 1041, wherein the second centerline of the liquid collecting cavity 1041 is parallel to the extension direction of the flow channel 103. With this arrangement, the second partition 1045 extends to the second centerline of the liquid collecting cavity 1041, that is, at half the height of the liquid collecting cavity 1041 along the Z direction, while the first partition 1044 extends beyond the second centerline of the liquid collecting cavity 1041, so that the first partition 1044 and the second partition 1045 form an interlaced structure along the Z direction within the liquid collecting cavity 1041.

[0078] As a further embodiment, the length of the first partition 1044 exceeding the second center line of the liquid collecting cavity 1041 disclosed in this utility model embodiment is 1mm-80mm. For example, the length of the first partition 1044 exceeding the second center line of the liquid collecting cavity 1041 can specifically be 1mm, 10mm, 20mm or 60mm. The greater the length of the first partition 1044 exceeding the second center line of the liquid collecting cavity 1041 along the Z direction, the larger the overlapping area between the two, and the non-overlapping area S1mm. 2 The smaller the value, the lower the S1 / S2 ratio, and the greater the flow resistance; conversely, the larger the value, the smaller the flow resistance.

[0079] It needs to be explained that pointing along the X direction Figure 4 The OX direction in the coordinate system points to the Y direction. Figure 4 The OY direction in the coordinate system points along the Z direction. Figure 4 The OZ direction in the coordinate system.

[0080] This utility model embodiment also discloses a battery pack, including a heat exchange plate 100 as disclosed in any of the above embodiments.

[0081] Since the battery pack uses the heat exchange plate 100 disclosed in the present utility model embodiment, the battery pack also has the technical advantages of the heat exchange plate 100 disclosed in the present utility model embodiment, and the present utility model embodiment will not elaborate on these advantages one by one.

[0082] This utility model embodiment also discloses an electrical device, including a battery pack as disclosed in any of the above embodiments.

[0083] Since the power device uses the battery pack disclosed in the present utility model embodiment, the power device also has the technical advantages of the battery pack disclosed in the present utility model embodiment, and the present utility model embodiment will not elaborate on these advantages further.

[0084] Finally, it should be noted that in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the term "comprising" or any other variation thereof is intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus.

[0085] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0086] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A heat exchange plate, characterized in that, It includes a heat exchange plate body and a liquid collection part, wherein the liquid collection part is disposed at one end of the heat exchange plate body and is connected to the heat exchange plate body; The heat exchange plate body has multiple flow channel partition plates arranged along the Y direction inside, and the Y direction is the arrangement direction of the flow channel partition plates. A flow channel for the heat exchange medium to pass through is formed between each two adjacent flow channel partition plates. The liquid collection section includes a liquid collection cavity, in which at least a first partition and a second partition are spaced apart along the Y direction, and the projections of adjacent first partitions and second partitions along the Y direction at least partially overlap. The non-overlapping area of ​​the projections of each adjacent first partition and second partition along the Y direction is S1mm. 2 The total area of ​​each adjacent first partition and second partition is S2mm. 2 The ratio of S1 / S2 is 0.2 to 0.8; The liquid collecting section is provided with an inlet and an outlet, and at least one first baffle and / or at least one second baffle are provided on the flow path from the inlet to the outlet. The liquid collecting section is connected to the heat exchange plate body through the inlet, the outlet and the heat exchange plate body.

2. The heat exchange plate according to claim 1, characterized in that, S1mm 2 The range is 60 mm 2 -500mm 2 , and / or S2mm 2 The range is 100 mm 2 -800mm 2 .

3. The heat exchange plate according to claim 1, characterized in that, The liquid collection chamber includes at least a first wall, which is the side wall of the liquid collection chamber away from the flow channel, and the first partition is disposed on the first wall.

4. The heat exchange plate according to claim 3, characterized in that, The liquid collection chamber further includes a second wall, which is a side wall of the liquid collection chamber near the flow channel and is disposed opposite to the first wall; The second partition is connected to the second wall.

5. The heat exchange plate according to claim 3, characterized in that, The liquid collection chamber further includes a second wall, which is a side wall of the liquid collection chamber near the flow channel and is disposed opposite to the first wall; There is a gap between the second partition and the second wall, and the second partition is disposed on the top or bottom wall of the liquid collection cavity.

6. The heat exchange plate according to claim 1, characterized in that, There are multiple first partitions and second partitions, and adjacent first partitions and second partitions are arranged alternately along the Y direction.

7. The heat exchange plate according to claim 1, characterized in that, The first partition extends along the X direction to the first center line of the liquid collection cavity, and the second partition extends along the X direction past the first center line of the liquid collection cavity; The X direction is the extension direction parallel to the flow channel.

8. The heat exchange plate according to claim 7, characterized in that, The length of the second partition extending beyond the first center line of the liquid collection cavity is 1mm-80mm.

9. The heat exchange plate according to claim 1, characterized in that, The first partition extends along the X direction through the first center line of the liquid collection cavity, and the second partition extends along the X direction to the first center line of the liquid collection cavity; The X direction is the extension direction parallel to the flow channel.

10. The heat exchange plate according to claim 9, characterized in that, The length of the first partition extending beyond the first center line of the liquid collection cavity is 1mm-80mm.

11. The heat exchange plate according to claim 1, characterized in that, The thickness of the first partition is 1mm-20mm, and / or the thickness of the second partition is 1mm-20mm.

12. The heat exchange plate according to claim 1, characterized in that, The first partition is disposed opposite to the flow channel partition, and the center line of the first partition coincides with the center line of the flow channel partition. Both the center line of the first partition and the center line of the flow channel partition are parallel to the extension direction of the flow channel.

13. The heat exchange plate according to claim 1, characterized in that, The centerline of the first partition is offset from the centerline of the flow channel partition, and both the centerline of the first partition and the centerline of the flow channel partition are parallel to the extension direction of the flow channel.

14. The heat exchange plate according to claim 13, characterized in that, The centerline of the first partition is located at a position 1 / 3 to 2 / 3 away from the centerline of the flow channel partition.

15. The heat exchange plate according to claim 1, characterized in that, The centerline of the second partition plate coincides with the centerline of the flow channel partition plate, and both the centerline of the second partition plate and the centerline of the flow channel partition plate are parallel to the extension direction of the flow channel.

16. The heat exchange plate according to claim 1, characterized in that, The centerline of the second partition is offset from the centerline of the flow channel partition, and both the centerline of the second partition and the centerline of the flow channel partition are parallel to the extension direction of the flow channel.

17. The heat exchange plate according to claim 16, characterized in that, The centerline of the second partition is located at a distance of 1 / 5 to 2 / 5 from the centerline of the flow channel partition.

18. The heat exchange plate according to claim 1, characterized in that, The first partition is disposed on the top wall of the liquid collection cavity and extends toward the bottom wall of the liquid collection cavity along the Z direction, wherein the Z direction is a direction that is perpendicular to both the X and Y directions. The second baffle is disposed on the bottom wall of the liquid collecting cavity and extends along the Z direction toward the top wall of the liquid collecting cavity, or The first partition is disposed on the bottom wall of the liquid collection cavity and extends toward the top wall of the liquid collection cavity along the Z direction, wherein the Z direction is a direction that is perpendicular to both the X and Y directions. The second partition is disposed on the top wall of the liquid collection cavity and extends toward the bottom wall of the liquid collection cavity along the Z direction.

19. The heat exchange plate according to claim 18, characterized in that, The first partition extends along the Z direction to the second center line of the liquid collection cavity, and the second partition extends along the Z direction past the second center line of the liquid collection cavity.

20. The heat exchange plate according to claim 19, characterized in that, The length of the second partition extending beyond the second center line of the liquid collection cavity is 1mm-80mm.

21. The heat exchange plate according to claim 18, characterized in that, The first partition extends past the second center line of the liquid collection cavity, and the second partition extends to the second center line of the liquid collection cavity, the second center line of the liquid collection cavity being parallel to the extension direction of the flow channel.

22. The heat exchange plate according to claim 21, characterized in that, The length of the first partition extending beyond the second centerline of the liquid collection cavity is 1mm-80mm.

23. A battery pack, characterized in that, Includes the heat exchange plate as described in any one of claims 1-22.

24. An electrical appliance, characterized in that, Includes the battery pack as described in claim 23.

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