Heat exchange plate, battery device and electric device

Abstract

The utility model discloses a heat exchange plate, a battery device and a power utilization device, and relates to the technical field of batteries, a cavity is formed in the heat exchange plate, the cavity is used for accommodating a heat exchange medium to adjust the temperature of a battery monomer, and an avoiding through hole separated from the cavity is further formed in the heat exchange plate; the receding through holes penetrate through the heat exchange plate in the thickness direction of the heat exchange plate and are suitable for being opposite to pressure release valves of the single batteries, and the edge of the end, in the axial direction of the receding through holes, of the heat exchange plate is integrally connected with a turned-over edge. Through the arrangement of the avoiding through holes, when dangerous conditions such as overheating of the single batteries occur, the pressure release valves can smoothly discharge gas and heat in the single batteries, and the turnup edges are integrally connected to the edges of the ends, in the axial direction of the avoiding through holes, of the heat exchange plates, so that the structural strength of the heat exchange plates at the avoiding through holes is improved; and meanwhile, the complexity of the heat exchange plate process is reduced, so that the convenience of heat exchange plate processing and production is improved.

Description

Technical Field

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

[0002] In recent years, new energy vehicles have gradually become a research hotspot in various countries. In particular, the research and development of key technologies for new energy vehicle power systems, such as batteries, has received key support. Among them, cold plates are important components for improving battery charging and discharging performance and safety.

[0003] In related technologies, the cold plate of the battery device has corresponding openings to avoid the pressure relief valve. In order to ensure the structural strength of the openings in the cold plate, it is usually necessary to add reinforcing structural components to the cold plate, which makes the manufacturing process of the cold plate complicated and inconvenient for the processing and production of the cold plate. Utility Model Content

[0004] This application provides a heat exchange plate, a battery device, and an electrical device. The heat exchange plate has good structural strength and ease of processing.

[0005] In a first aspect, embodiments of this application provide a heat exchange plate, wherein a cavity is formed within the heat exchange plate for accommodating a heat exchange medium to regulate the temperature of a battery cell, and a clearance through hole is also formed on the heat exchange plate, which is spaced apart from the cavity. The clearance through hole penetrates the heat exchange plate along its thickness direction and is adapted to be opposite to the pressure relief valve of the battery cell. A flange is integrally connected to one axial end edge of the heat exchange plate at the clearance through hole.

[0006] In the above technical solution, by setting a relief through hole on the heat exchange plate opposite to the pressure relief valve of the battery cell, the pressure relief valve can smoothly discharge the gas and heat inside the battery cell when the battery cell is overheated or in other dangerous situations. This helps to reduce the risk of accidents such as deflagration caused by excessive internal pressure of the battery cell. By integrally connecting a flange at one axial end of the relief through hole on the heat exchange plate, the structural strength of the heat exchange plate at the relief through hole is improved. At the same time, no additional reinforcing structural components are needed, which helps to reduce the complexity of the heat exchange plate manufacturing process, thereby improving the convenience of heat exchange plate processing and production, and thus improving the production efficiency of the heat exchange plate.

[0007] According to some embodiments of this application, the flange abuts against one side of the thickness of the heat exchange plate so that the thickness direction of the flange is consistent with the thickness direction of the heat exchange plate.

[0008] In the above technical solution, by making the flange abut against the thickness side of the heat exchange plate, the flange can support the heat exchange plate in the thickness direction, which helps to improve the structural strength of the heat exchange plate, thereby reducing the risk of damage to the heat exchange plate and thus helping to improve the service life of the heat exchange plate.

[0009] According to some embodiments of this application, the flange extends circumferentially along the avoidance through hole to form a closed ring, or the flange includes a plurality of flange segments spaced apart circumferentially along the avoidance through hole.

[0010] In the above technical solutions, the flange extends into a closed ring along the circumference of the avoidance through hole, which helps reduce the stamping process and thus improves the processing convenience of the flange. Furthermore, the ring-shaped flange has good structural strength, which helps to enhance the reinforcement effect of the flange on the heat exchange plate. This further reduces the risk of damage to the heat exchange plate at the avoidance through hole and increases the service life of the heat exchange plate. Alternatively, by making the flange include multiple flange segments spaced apart along the circumference of the avoidance through hole, the risk of the flange breaking during processing is reduced. At the same time, the flange segments can also support and reinforce the heat exchange plate at the edge of the avoidance through hole, thereby improving the structural strength of the heat exchange plate.

[0011] According to some embodiments of this application, the avoidance through hole is a circular hole, an elliptical hole, or a polygonal hole.

[0012] The above technical solution is beneficial to improving the processing convenience of the clearance through hole and to making the clearance through hole compatible with the pressure relief valve, thereby improving the compatibility effect of the clearance through hole with the pressure relief valve.

[0013] According to some embodiments of this application, the clearance through hole is a circular hole, and the flange extends in a closed ring along the circumference of the clearance through hole; or, the clearance through hole is a square hole, and the flange includes four flange segments spaced apart along the circumference of the clearance through hole; or, the clearance through hole is a square hole, and the flange includes two flange segments arranged opposite to each other.

[0014] In the above technical solutions, by forming the clearance through hole as a circular hole, the clearance through hole can be adapted to a circular pressure relief valve. By forming the flange as a closed ring extending circumferentially along the clearance through hole, the structural strength of the flange is improved, thereby enhancing the strengthening effect of the flange on the heat exchange plate. Alternatively, by forming the clearance through hole as a square hole, the clearance through hole can be adapted to a square pressure relief valve. By including four flange segments spaced apart circumferentially along the clearance through hole, the flange can strengthen the heat exchange plate around the clearance through hole, thus improving the structural strength of the heat exchange plate around the clearance through hole. Alternatively, by forming the clearance through hole as a square hole, the flange includes two opposing flange segments, allowing the clearance through hole to be adapted to a square pressure relief valve. The flange can strengthen the heat exchange plate on both sides of the clearance through hole, while also improving the processing convenience of the flange.

[0015] According to some embodiments of this application, there are multiple avoidance through holes that are spaced apart, the distance between two adjacent avoidance through holes is greater than or equal to 12mm, the flanges corresponding to two adjacent avoidance through holes are spaced apart, and / or the flanges corresponding to two adjacent avoidance through holes are partially stacked along the thickness direction of the heat exchange plate.

[0016] In the above technical solution, by making the distance between two adjacent clearance through holes greater than or equal to 12mm, the tooling can be supported between the two adjacent clearance through holes, which facilitates the flanging stamping and forming, and helps to improve the service life of the stamping die. By setting the flanging intervals corresponding to the two adjacent clearance through holes, the thickness consistency of the heat exchange plate at the location where the flanging is set can be improved, thereby reducing the risk of interference with the installation of the heat exchange plate due to the inconsistent thickness at the location where the heat exchange plate is set. Alternatively, by making the flanging corresponding to the two adjacent clearance through holes partially overlap along the thickness direction of the heat exchange plate, the strengthening effect of the flanging on the heat exchange plate can be further improved, and the risk of damage to the heat exchange plate can be reduced.

[0017] According to some embodiments of this application, a plurality of clearance through holes spaced apart along a first direction constitute a through hole group. There are multiple through hole groups, and the multiple through hole groups are spaced apart along a second direction. The distance between two adjacent through hole groups is greater than the distance between two adjacent clearance through holes in the through hole group. The flange includes two flange segments arranged opposite to each other along the second direction, and the second direction is perpendicular to the first direction.

[0018] In the above technical solution, by making the spacing between two adjacent sets of through holes greater than the spacing between two adjacent avoidance through holes in the through hole set, it is beneficial to make the arrangement of the avoidance through holes compatible with the arrangement of the pressure relief valve on the battery cell, thereby improving the avoidance effect of the avoidance through holes on the corresponding avoidance of the pressure relief valve. At the same time, by making the flange include two flange sections arranged opposite to each other along the second direction, it is beneficial to improve the processing convenience of the flange sections, thereby improving the processing convenience of the heat exchange plate.

[0019] According to some embodiments of this application, the width of the flange in the radial direction of the avoidance through hole is x, and the avoidance through hole is a circular hole with a diameter of r, r / 4≤x≤r / 2; or, the avoidance through hole is a square hole with a width of d, d / 4≤x≤d / 2.

[0020] In the above technical solution, by ensuring that the dimensional relationship between the width x of the flange and the diameter r of the clearance through hole formed as a circular hole satisfies the formula: r / 4≤x≤d / 2, or by ensuring that the dimensional relationship between the width of the flange and the width d of the clearance through hole formed as a square hole satisfies: d / 4≤x≤d / 2, it is beneficial to make the width dimension of the flange match the size of the clearance through hole, which is beneficial to improve the strengthening effect of the flange on the heat exchange plate. At the same time, it is beneficial to reduce the risk that the flange is inconvenient to process due to the excessive width dimension of the flange, and it is also beneficial to reduce the risk that the flange affects the arrangement of the cavity.

[0021] According to some embodiments of this application, the cavity has a medium outlet and a medium inlet, the heat exchange plate includes a first plate and a second plate stacked along its thickness direction, the first plate and the second plate are separate components, at least one of the first plate and the second plate has a groove formed on its surface facing the other, so that the cavity is defined between the first plate and the second plate, and the flange is integrally connected to the side of the first plate opposite to the second plate, or the flange is integrally connected to the side of the second plate opposite to the first plate.

[0022] In the above technical solution, by making the first plate and the second plate separate parts, it is beneficial to reduce the manufacturing difficulty of the heat exchange plate. At least one of the first plate and the second plate has a groove on the surface facing the other, so that the interior of the heat exchange plate can define a cavity for filling the heat exchange medium. By making the flange integrally connected to the side of the first plate away from the second plate, or by making the flange integrally connected to the side of the second plate away from the first plate, it is beneficial to reduce the risk of insufficient filling of the heat exchange medium due to the flange occupying the space in the cavity, thereby improving the heat exchange effect of the heat exchange plate on the battery cell.

[0023] According to some embodiments of this application, the first plate has the groove formed thereon, the thickness t of the first plate satisfies 1mm≤t≤1.5mm, the surface of the second plate facing the first plate is flat, the first plate and the second plate are welded and fixed, and the flange is integrally connected to the side of the first plate away from the second plate.

[0024] In the above technical solution, by making the flange integrally connected to the side of the first plate away from the second plate, the flange can be applied to heat exchange plates with small thickness and where it is impossible to set groove structure features around the avoidance through hole, thereby improving the processing convenience and structural strength of the heat exchange plate.

[0025] Secondly, embodiments of this application provide a battery device, the battery device including a plurality of battery cells, the battery device further including one of a first heat exchanger and a second heat exchanger, the first heat exchanger being the aforementioned heat exchange plate and disposed on the same side of all the battery cells, the first heat exchanger being thermally connected with each of the battery cells; the second heat exchanger being the aforementioned heat exchange plate and sandwiched between two adjacent battery packs, each battery pack including a plurality of battery cells disposed along the length direction and / or width direction of the second heat exchanger, the second heat exchanger being thermally connected with the battery packs on both sides of its thickness.

[0026] In the above technical solution, the arrangement of multiple battery cells allows the battery device to provide higher voltage and capacity, which is beneficial to improving the charging efficiency of the battery device for the power-consuming device. When the battery device includes a first heat exchanger, by placing the first heat exchanger on the same side of all battery cells, the first heat exchanger can exchange heat with all battery cells, which helps to reduce the number of components in the battery device, thereby improving the production and processing efficiency of the battery device. When the battery device includes a second heat exchanger, by sandwiching the second heat exchanger between two adjacent battery packs, each second heat exchanger can exchange heat with two battery packs respectively, which helps to improve the heat exchange efficiency of the battery packs, thereby helping to reduce the risk of thermal runaway of the battery device. In addition, since both the first heat exchanger and the second heat exchanger are the aforementioned heat exchange plates, it helps to ensure the structural strength of the first heat exchanger and the second heat exchanger, reduces the risk of damage to the first heat exchanger and the second heat exchanger, and also helps to improve the production and processing convenience of the battery device.

[0027] According to some embodiments of this application, the battery device includes a first heat exchanger and a housing. The first heat exchanger is disposed between the bottom wall of the housing and the battery cell. A discharge channel communicating with the clearance through hole is formed between the first heat exchanger and the bottom wall of the housing.

[0028] In the above technical solution, by setting the first heat exchanger between the bottom wall of the housing and the battery cell, and forming a discharge channel communicating with the avoidance through hole between the first heat exchanger and the bottom wall of the housing, pressure can be released from the bottom of the battery device. This is beneficial to improving the safety of the battery device during pressure release, and also beneficial to reducing the impact of thermal runaway of the battery cell on other components (such as electrical units) in the battery device, thereby improving the safety of the battery device.

[0029] According to some embodiments of this application, the battery device further includes a support structure disposed in the discharge channel and abutting between the bottom wall of the housing and the first heat exchanger, wherein the support structure is configured to avoid the avoidance through hole.

[0030] In the above technical solution, by setting a support structure, it is easy to form a discharge channel between the bottom wall of the box and the first heat exchanger. By further setting the support structure to avoid the through hole, it is beneficial to reduce the risk of the battery cell pressure being affected by the support structure blocking the through hole.

[0031] Thirdly, embodiments of this application provide an electrical device, characterized in that it includes the aforementioned battery device, which is used to provide electrical energy.

[0032] In the above technical solution, since the electrical device is equipped with the aforementioned battery device, and the heat exchange plate inside the battery device has good structural strength and good processing convenience, it is beneficial to improve the service life and processing convenience of the electrical device.

[0033] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0034] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0035] Figure 1 This application provides structural schematic diagrams of vehicles for some embodiments;

[0036] Figure 2 Exploded views of battery devices provided in some embodiments of this application;

[0037] Figure 3 This is a partial structural diagram of the heat exchange plate according to the first embodiment of this application. Figure 1 ;

[0038] Figure 4 This is a partial structural diagram of the heat exchange plate according to the first embodiment of this application. Figure 2 ;

[0039] Figure 5 This is a partial structural diagram of the heat exchange plate according to the second embodiment of this application. Figure 1 ;

[0040] Figure 6 This is a partial structural diagram of the heat exchange plate according to the second embodiment of this application. Figure 2 ;

[0041] Figure 7 This is a partial structural diagram of the heat exchange plate according to the third embodiment of this application. Figure 1 ;

[0042] Figure 8 This is a partial structural diagram of the heat exchange plate according to the third embodiment of this application. Figure 2 ;

[0043] Figure 9 This is a partial cross-sectional view of a heat exchange plate according to some embodiments of this application;

[0044] Figure 10 This is a schematic diagram of a portion of the housing, the supporting structure, and the structure of the first heat exchanger in some embodiments of this application;

[0045] Figure 11 This is a partial structural diagram of the box body according to some embodiments of this application.

[0046] Figure label:

[0047] Heat exchange plate 100, cavity 101, first plate 102, second plate 103, groove 104.

[0048] Avoidance through hole 110, through hole group 111

[0049] Flanged edge 120, Flanged edge section 121

[0050] Battery device 200, battery cell 210, battery pack 220

[0051] Box 230, First Sub-box 230a, Second Sub-box 230b

[0052] Support structure 240, first heat exchanger 250, exhaust channel 260,

[0053] Electrical device 1000, controller 300, motor 400. Detailed Implementation

[0054] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0055] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used in the description of this application is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms "comprising" and "having," and any variations thereof, in the description, claims, and accompanying drawings of this application are intended to cover non-exclusive inclusion. The terms "first," "second," etc., in the description, claims, or accompanying drawings of this application are used to distinguish different objects, not to describe a specific order or hierarchy.

[0056] In this application, the reference to "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment that is mutually exclusive with other embodiments.

[0057] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "attachment" should be interpreted broadly. For example, they can refer to direct connection or indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0058] In this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, in this application, the character " / " generally indicates that the preceding and following related objects have an "or" relationship.

[0059] In the embodiments of this application, the same reference numerals denote the same components, and for the sake of brevity, detailed descriptions of the same components are omitted in different embodiments. It should be understood that the thickness, length, width, and other dimensions of various components in the embodiments of this application shown in the accompanying drawings, as well as the overall thickness, length, width, and other dimensions of the integrated device, are merely illustrative and should not constitute any limitation on this application.

[0060] In this application, "multiple" means two or more (including two).

[0061] In this application, the battery cell may include lithium-ion secondary batteries, lithium-ion primary batteries, lithium-sulfur batteries, sodium-lithium-ion batteries, sodium-ion batteries, or magnesium-ion batteries, etc., and the embodiments of this application are not limited to these. The battery cell may be cylindrical, flat, cuboid, or other shapes, etc., and the embodiments of this application are not limited to these. Battery cells are generally divided into three types according to their packaging method: cylindrical battery cells, square battery cells, and pouch battery cells, and the embodiments of this application are not limited to these.

[0062] For example, a single battery cell typically includes a housing, a cell assembly, and an electrolyte. The housing is used to house the cell assembly and the electrolyte, and the housing has at least one positive electrode post and at least one negative electrode post. The cell assembly includes one or more electrode assemblies, which are formed by stacking or winding positive electrode sheets, negative electrode sheets, and separators.

[0063] The positive electrode generally includes a positive current collector and a positive active material layer. The positive active material layer is directly or indirectly coated on the positive current collector. The positive current collector without the positive active material layer protrudes from the positive current collector with the positive active material layer. The positive current collector without the positive active material layer serves as a positive electrode tab. Multiple positive electrode tabs are stacked together and form an electrical connection with the positive electrode post. For example, the multiple stacked positive electrode tabs can be directly soldered to the positive electrode post to form an electrical connection; or, the battery cell assembly can also include a positive electrode adapter piece. The multiple stacked positive electrode tabs are soldered to one end of the positive electrode adapter piece, and the other end of the positive electrode adapter piece is soldered to the positive electrode post, so that the positive electrode tabs and the positive electrode post form an electrical connection.

[0064] The negative electrode generally includes a negative current collector and a negative active material layer. The negative active material layer is directly or indirectly coated on the negative current collector. The negative current collector without the negative active material layer protrudes from the negative current collector with the negative active material layer. The negative current collector without the negative active material layer serves as a negative electrode tab. Multiple negative electrode tabs are stacked together and form an electrical connection with the negative electrode post. For example, the stacked negative electrode tabs can be directly welded to the negative electrode post to form an electrical connection; alternatively, the battery cell assembly may also include a negative electrode adapter piece. The stacked negative electrode tabs are welded to one end of the negative electrode adapter piece, and the other end of the negative electrode adapter piece is welded to the negative electrode post, so that the negative electrode tabs and the negative electrode post form an electrical connection. The material of the separator is not limited; for example, it can be polypropylene or polyethylene.

[0065] The pressure relief valve on the battery cell mentioned in this application is used to release gas inside the battery cell when the internal pressure is too high (e.g., due to overcharging), thereby reducing the internal pressure and preventing the battery cell from exploding due to excessively rapid pressurization. For example, the pressure relief valve can be an explosion-proof valve, an explosion-proof disc, etc.

[0066] In recent years, new energy vehicles have made leaps and bounds in development. In the field of electric vehicles, batteries, as the power source of electric vehicles, play an irreplaceable and important role.

[0067] In related technologies, the cold plate of the battery pack has corresponding openings to avoid the pressure relief valve. In order to ensure the structural strength of the openings in the cold plate, it is usually necessary to add reinforcing structural components to the cold plate, which makes the manufacturing process of the cold plate complicated and inconvenient for the processing and production of the cold plate.

[0068] Based on the above considerations, in order to improve the processing and production convenience of the cold plate while ensuring the structural strength of the opening, a heat exchange plate is proposed. The heat exchange plate has a cavity formed inside, which is used to contain the heat exchange medium to regulate the temperature of the battery cell. The heat exchange plate also has a clearance through hole that is separated from the cavity. The clearance through hole penetrates the heat exchange plate along the thickness direction and is suitable to be opposite to the pressure relief valve of the battery cell. The heat exchange plate has a flange integrally connected to one axial end edge of the clearance through hole.

[0069] In the above technical solution, by setting a relief through hole on the heat exchange plate opposite to the pressure relief valve of the battery cell, the pressure relief valve can smoothly discharge the gas and heat inside the battery cell when the battery cell is overheated or in other dangerous situations. This helps to reduce the risk of accidents such as deflagration caused by excessive internal pressure of the battery cell. By integrally connecting a flange at one axial end of the relief through hole on the heat exchange plate, the structural strength of the heat exchange plate at the relief through hole is improved. At the same time, no additional reinforcing structural components are needed, which helps to reduce the complexity of the heat exchange plate manufacturing process, thereby improving the convenience of heat exchange plate processing and production, and thus improving the production efficiency of the heat exchange plate.

[0070] This application provides a battery device using the heat exchange plate disclosed herein. A battery device refers to a single physical module comprising multiple battery cells to provide higher voltage and capacity. For example, the battery device mentioned in this application can be a battery module or a battery pack. A battery module generally includes multiple battery cells, and a battery device generally includes a housing for encapsulating multiple battery cells or battery modules. The housing can prevent liquids or other foreign matter from affecting the charging or discharging of the battery cells.

[0071] This application provides an electrical device using the battery device disclosed herein. The electrical device can be, but is not limited to, mobile phones, tablets, laptops, electric toys, power tools, electric vehicles, electric cars, ships, spacecraft, etc. Electric toys can include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc. Spacecraft can include airplanes, rockets, space shuttles, and spacecraft, etc. Power tools include metal cutting power tools, grinding power tools, assembly power tools, and railway power tools, such as electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete vibrators, and electric planers, etc.

[0072] For ease of explanation, the following embodiments use a vehicle as an example to describe the structure of the electrical device 1000, battery device 200, and heat exchange plate 100 of this application.

[0073] Please refer to Figure 1 , Figure 1The electrical device 1000 provided in some embodiments of this application is a structural schematic diagram of a vehicle. The vehicle can be a gasoline-powered vehicle, a natural gas-powered vehicle, or a new energy vehicle. New energy vehicles can be pure electric vehicles, hybrid electric vehicles, or range-extended electric vehicles, etc. The vehicle is equipped with a battery device 200, which can be located at the bottom, front, or rear of the vehicle. The battery device 200 can be used to power the vehicle; for example, the battery device 200 can serve as the vehicle's operating power source. The vehicle may also include a controller 300 and a motor 400. The controller 300 is used to control the battery to supply power to the motor 400, for example, to meet the power needs of starting, navigation, and driving the vehicle. In some embodiments of this application, the battery device 200 can not only serve as the vehicle's operating power source but also as the vehicle's driving power source, replacing or partially replacing gasoline or natural gas to provide driving power for the vehicle.

[0074] Please refer to Figure 2 , Figure 2 This is an exploded view of a battery device 200 provided in some embodiments of this application. The battery device 200 includes a plurality of battery cells 210, and also includes one of a first heat exchanger 250 and a second heat exchanger (not shown). The first heat exchanger 250 is the heat exchange plate 100 described above, and is disposed on the same side of all battery cells 210. The first heat exchanger 250 is thermally connected to each battery cell 210. The second heat exchanger is the heat exchange plate 100 described above, and is sandwiched between two adjacent battery packs 220. Each battery pack 220 includes a plurality of battery cells 210 disposed along the length and / or width direction of the second heat exchanger. The second heat exchanger is thermally connected to the battery packs 220 on both sides of its thickness.

[0075] In some embodiments, the battery device 200 may include a first heat exchanger 250 and a plurality of battery cells 210. The first heat exchanger 250 may be disposed on the same side of all battery cells 210 so that the first heat exchanger 250 can exchange heat with all battery cells 210. In other embodiments, the battery device 200 may include a second heat exchanger and a plurality of battery cells 210, some of which constitute multiple battery packs 220. The second heat exchanger is sandwiched between two adjacent battery packs 220 so that the second heat exchanger can exchange heat with the battery packs 220 located on both sides thereof.

[0076] It should be noted that the number of battery packs 220 is less than the number of battery cells 210. For example, there can be 100 battery cells 210, and 20 battery cells 210 constitute a battery pack 220.

[0077] Please combine Figures 3 to 9 , Figure 3 This is a partial structural diagram of the heat exchange plate 100 according to the first embodiment of this application. Figure 1 , Figure 4 This is a partial structural diagram of the heat exchange plate 100 according to the first embodiment of this application. Figure 2 , Figure 5 This is a partial structural diagram of the heat exchange plate 100 according to the second embodiment of this application. Figure 1 , Figure 6 This is a partial structural diagram of the heat exchange plate 100 according to the second embodiment of this application. Figure 2 , Figure 7 This is a partial structural diagram of the heat exchange plate 100 according to the third embodiment of this application. Figure 1 , Figure 8 This is a partial structural diagram of the heat exchange plate 100 according to the third embodiment of this application. Figure 2 , Figure 9 This is a partial cross-sectional view of the heat exchange plate 100 according to an embodiment of this application. In the embodiment of this application, a cavity 101 is formed in the heat exchange plate 100. The cavity 101 is used to contain the heat exchange medium to regulate the temperature of the battery cell 210. A clearance through hole 110 is also formed on the heat exchange plate 100, which is spaced apart from the cavity 101. The clearance through hole 110 penetrates the heat exchange plate 100 along the thickness direction and is adapted to be opposite to the pressure relief valve of the battery cell 210.

[0078] It should be noted that "the thickness direction of the heat exchange plate 100" can be understood as the direction perpendicular to the first and second directions described below, or as the direction parallel to the axial direction of the clearance through hole 110.

[0079] For example, the heat exchange plate 100 can be disposed within the battery device 200, and the heat exchange plate 100 can be opposite to at least one side of the battery cell 210. The heat exchange medium filled in the heat exchange plate 100 can exchange heat with the battery cell 210 to regulate the temperature of the battery cell 210. The battery cell 210 is provided with a pressure relief valve. A clearance through hole 110 is provided on the heat exchange plate 100 along the thickness direction to avoid the pressure relief valve, thereby reducing the risk of interference between the pressure relief valve and the heat exchange plate 100. When the pressure relief valve releases pressure, the gas and heat discharged through the pressure relief valve can be discharged through the clearance through hole 110, which helps to improve the smoothness of pressure relief valve release.

[0080] The bypass through hole 110 is separated from the cavity 101, meaning that the bypass through hole 110 and the cavity 101 are not connected. This reduces the risk of the heat exchange medium in the cavity 101 leaking through the bypass through hole 110, thereby helping to reduce the risk of the battery device 200 failing to operate normally due to heat exchange medium leakage.

[0081] Furthermore, combined Figures 3 to 8The heat exchange plate 100 has an integrally connected flange 120 at one axial end edge of the clearance through hole 110. The flange 120 helps to improve the structural strength of the heat exchange plate 100 at the clearance through hole 110. When the battery cell 210 thermally runs away, the pressure relief valve opens to discharge the discharge material, which generates a large pressure around the clearance through hole 110. The above-mentioned setting can reduce the risk of damage to the heat exchange plate 100 at the clearance through hole 110 when the battery cell 210 thermally runs away, thereby helping to improve the service life of the heat exchange plate 100. At the same time, there is no need to set additional reinforcing structural components on the heat exchange plate 100, which helps to simplify the structure of the heat exchange plate 100 and reduce the complexity of the working process of the heat exchange plate 100, thereby helping to improve the processing and production efficiency of the heat exchange plate 100.

[0082] For example, the flange 120 can be formed by stamping the heat exchange plate 100 at the location of the through hole 110, so that the flange 120 is integral with the heat exchange plate 100, such as Figure 8 As shown, the stamped flange 120 can fit and cooperate with the thickness side surface of the heat exchange plate 100 at one end of the axial clearance through hole 110, which is beneficial to increase the thickness of the heat exchange plate 100 at the edge of the clearance through hole 110, thereby improving the structural strength of the heat exchange plate 100 at the clearance through hole 110.

[0083] Please combine Figure 4 and Figure 6 In other embodiments, the flange 120 may be set at an angle to the thickness side surface of the axial end of the heat exchange plate 100 corresponding to the through hole 110, that is, the flange 120 is spaced apart from the heat exchange plate 100 at a position away from the central axis of the through hole 110. For example, the angle may be less than or equal to 90°. This can also improve the structural strength of the heat exchange plate 100 at the through hole 110, and help reduce the processing accuracy of the flange 120, thereby helping to improve the production efficiency of the heat exchange plate 100.

[0084] It is understandable that the fit between the surface of the heat exchange plate 100 on the axial side of the avoidance through hole 110 and the flange 120 can be determined according to actual production requirements, and no specific limitation is made here, as long as the structural strength of the heat exchange plate 100 at the position of the avoidance through hole 110 is guaranteed.

[0085] In the above technical solution, by providing a clearance through hole 110 on the heat exchange plate 100, the heat exchange plate 100 can avoid the pressure relief valve on the battery cell 210, which is beneficial to improving the smoothness of pressure relief valve. The clearance through hole 110 is separated from the cavity 101, which is beneficial to reducing the risk of leakage of heat exchange medium. At the same time, by making a flange 120 integrally connected to one axial end edge of the heat exchange plate 100 at the clearance through hole 110, the structural strength of the heat exchange plate 100 at the clearance through hole 110 is improved, the risk of damage to the heat exchange plate 100 at the clearance through hole 110 is reduced, which is beneficial to improving the service life of the heat exchange plate 100. In addition, there is no need to provide additional reinforcing structural components on the heat exchange plate 100, which is beneficial to simplifying the structure of the heat exchange plate 100 and reducing the complexity of the working process of the heat exchange plate 100, which is beneficial to improving the processing and production efficiency of the heat exchange plate 100.

[0086] Please combine Figures 3 to 8 In the embodiments of this application, the flange 120 abuts against the thickness side of the heat exchange plate 100 so that the thickness direction of the flange 120 is consistent with the thickness direction of the heat exchange plate 100.

[0087] In the above technical solution, by making the flange 120 abut against the thickness side of the heat exchange plate 100, the flange 120 can support the heat exchange plate 100 in the thickness direction, which is beneficial to improving the structural strength of the heat exchange plate 100, thereby reducing the risk of damage to the heat exchange plate 100 and thus improving the service life of the heat exchange plate 100.

[0088] For example, the thickness direction of the flange 120 can be parallel to the thickness direction of the heat exchange plate 100. For instance, the flange 120 formed by stamping can be fitted to one side surface of the heat exchange plate 100 to achieve the flange 120 abutting against the thickness side of the heat exchange plate 100, which is beneficial to improving the strengthening effect of the flange 120 on the structural strength of the heat exchange plate 100. Alternatively, the thickness direction of the flange 120 can be non-parallel to the thickness direction of the heat exchange plate 100, with a small angle between them, such as an angle less than or equal to 5°. For instance, the surface of the heat exchange plate 100 opposite to the flange 120 can not be fitted to the flange 120. It can also be understood that the surface of the heat exchange plate 100 opposite to the flange 120 is arranged at an angle to the flange 120 to achieve the flange 120 abutting against the thickness side of the heat exchange plate 100, improving the structural strength of the heat exchange plate 100, while also helping to reduce the processing accuracy of the flange 120.

[0089] Combination Figures 3 to 8 In the embodiments of this application, the flange 120 extends circumferentially along the through hole 110 to form a closed ring, or the flange 120 includes a plurality of flange segments 121 spaced circumferentially along the through hole 110.

[0090] In the above technical solution, by extending the flange 120 into a closed ring along the circumference of the avoidance through hole 110, it is beneficial to reduce the stamping process, thereby improving the processing convenience of the flange 120. Furthermore, the annular flange 120 has good structural strength, which is beneficial to improving the strengthening effect of the flange 120 on the heat exchange plate 100. This further reduces the risk of damage to the heat exchange plate 100 at the avoidance through hole 110 and improves the service life of the heat exchange plate 100. Alternatively, by making the flange 120 include multiple flange segments 121 spaced apart along the circumference of the avoidance through hole 110, it is beneficial to reduce the risk of breakage and damage to the flange 120 during processing. At the same time, the flange segments 121 can also support and strengthen the heat exchange plate 100 at the edge of the avoidance through hole 110, thereby improving the structural strength of the heat exchange plate 100.

[0091] For example, the closed annular flange 120 can be formed by stamping in one go, thereby reducing the processing steps of the flange 120 and improving the processing convenience of the flange 120; multiple flange segments 121 arranged circumferentially along the avoidance through hole 110 can be formed by shearing the plate body of the heat exchange plate 100 in the circumferential direction of the avoidance through hole 110 after the avoidance through hole 110 is processed on the heat exchange plate 100, and then stamping in one go, which helps to reduce the risk of the flange 120 breaking and being damaged during processing.

[0092] In the embodiments of this application, the bypass through hole 110 is a circular hole, an elliptical hole, or a polygonal hole.

[0093] The above technical solution is beneficial to improving the processing convenience of the bypass through hole 110 and to making the bypass through hole 110 compatible with the pressure relief valve, thereby improving the compatibility effect of the bypass through hole 110 with the pressure relief valve.

[0094] For example, please combine Figure 3 and Figure 5 The through hole 110 can be formed as a polygonal hole. For example, the through hole 110 can be formed as a rectangular hole, a pentagonal hole, or a hexagonal hole. Polygonal holes are more flexible in terms of space utilization and are easier to adapt to the surrounding structure or space. For example, in the corner area or compact area of ​​the heat exchange plate 100, polygonal holes can be processed and laid out more conveniently to make full use of the limited space on the heat exchange plate 100.

[0095] Alternatively, the clearance through hole 110 can be formed as a circular hole. When the pressure relief valve is releasing pressure, the hole wall of the circular hole is subjected to more uniform force, and it is less likely to cause local stress concentration. This helps to reduce the risk of damage to the heat exchange plate 100 at the clearance through hole 110. In addition, the circular hole helps to reduce the resistance of the hole wall to the gas flow when the pressure relief valve is releasing pressure, thereby improving the smoothness of pressure relief.

[0096] Alternatively, the clearance through hole 110 can be formed as an elliptical hole. The elliptical hole has high structural stability and helps to reduce the resistance of the hole wall to gas flow when the pressure relief valve is releasing pressure, thereby improving the smoothness of pressure relief.

[0097] It is understandable that the specific shape of the clearance through hole 110 can be determined according to the shape of the pressure relief valve or the actual production requirements, and no specific limitation is made here.

[0098] Please combine Figures 3 to 8 In the embodiments of this application, the bypass through hole 110 is a circular hole, and the flange 120 extends in a closed ring along the circumference of the bypass through hole 110; or, the bypass through hole 110 is a square hole, and the flange 120 includes four flange segments 121 spaced apart along the circumference of the bypass through hole 110; or, the bypass through hole 110 is a square hole, and the flange 120 includes two flange segments 121 arranged opposite to each other.

[0099] In the above technical solution, by forming the clearance through hole 110 as a circular hole, the clearance through hole 110 can be adapted to a circular pressure relief valve. By forming the flange 120 as a closed ring extending circumferentially along the clearance through hole 110, the structural strength of the flange 120 is improved, thereby enhancing the strengthening effect of the flange 120 on the heat exchange plate 100. Alternatively, by forming the clearance through hole 110 as a square hole, the clearance through hole 110 can be adapted to a square pressure relief valve. By making the flange 120 include four rings extending circumferentially along the clearance through hole 110... The spaced-apart flange sections 121 allow the flanges 120 to reinforce the heat exchange plates 100 around the through holes 110, thereby improving the structural strength of the heat exchange plates 100 around the through holes 110. Alternatively, by forming the through holes 110 into square holes, the flanges 120 include two opposing flange sections 121, allowing the through holes 110 to be adapted to square pressure relief valves. The flanges 120 can reinforce the heat exchange plates 100 on both sides of the through holes 110, while also improving the ease of processing the flanges 120.

[0100] For example, please refer to Figure 7 The through hole 110 can be formed as a circular hole, and the flange 120 is formed as a closed annular flange 120 extending circumferentially along the through hole 110, so that the shape of the flange 120 can be adapted to the shape of the through hole 110, and it is beneficial to improve the strengthening effect of the flange 120 on the heat exchange plate 100.

[0101] In other embodiments, please refer to Figure 3The clearance through hole 110 can be formed as a square hole, and four flange segments 121 are spaced apart along the circumferential direction of the clearance through hole 110, which helps to reduce the risk of damage to the flange 120 during processing. In addition, the four flange segments 121 can respectively strengthen the heat exchange plate 100 around the clearance through hole 110, which helps to improve the structural strength of the heat exchange plate 100 around the clearance through hole 110.

[0102] In other embodiments, please refer to Figure 5 The bypass through hole 110 is formed into a square hole, and two flange sections 121 are respectively provided on opposite sides of the bypass through hole 110. The two flange sections 121 can strengthen the heat exchange plates 100 on both sides of the bypass through hole 110 and improve the processing convenience of the flange 120.

[0103] It is understandable that the shape of the avoidance through hole 110 and the specific structure of the flange 120 can be determined according to actual production requirements, and no specific limitation is made here.

[0104] Please combine Figure 3 , Figure 5 and Figure 7 In the embodiments of this application, there are multiple and spaced-apart through holes 110, the distance between two adjacent through holes 110 is greater than or equal to 12mm, the flanges 120 corresponding to two adjacent through holes 110 are spaced-apart, and / or the flanges 120 corresponding to two adjacent through holes 110 are partially stacked along the thickness direction of the heat exchange plate 100.

[0105] In the above technical solution, by making the distance between two adjacent clearance through holes 110 greater than or equal to 12mm, the tooling can be supported between the two adjacent clearance through holes 110, which facilitates the stamping of the flange 120 and helps to improve the service life of the stamping die. By setting the flanges 120 corresponding to the two adjacent clearance through holes 110 at intervals, the thickness consistency of the heat exchange plate 100 at the position where the flanges 120 are set can be improved, thereby reducing the risk of interference with the installation of the heat exchange plate 100 due to the inconsistent thickness at the position where the flanges 120 are set. Alternatively, by making the flanges 120 corresponding to the two adjacent clearance through holes 110 partially overlap along the thickness direction of the heat exchange plate 100, the strengthening effect of the flanges 120 on the heat exchange plate 100 can be further improved, reducing the risk of damage to the heat exchange plate 100.

[0106] For example, please refer to Figure 3The clearance through holes 110 can be spaced apart along the first direction described below. The distance between two adjacent clearance through holes 110 is defined as L, where L ≥ 12 mm. Both adjacent clearance through holes 110 are provided with flanges 120 on the side facing each other. The two flanges 120 can be spaced apart in the first direction. Alternatively, the flanges 120 provided on the side of the two adjacent clearance through holes 110 that are close to each other can be partially stacked along the thickness direction of the heat exchange plate 100.

[0107] It should be noted that "first direction" can be understood as the width or length direction of the heat exchange plate 100. A specific direction diagram can be found in [reference needed]. Figures 3 to 8 as well as Figure 10 As shown.

[0108] It is understandable that the arrangement of the flanges 120 corresponding to two adjacent avoidance through holes 110 can be determined according to actual production requirements, and no specific limitation is made here.

[0109] In some embodiments, the plurality of clearance through holes 110 are formed as square holes, and the sum of the opening areas of the plurality of clearance through holes 110 accounts for about 10% of the area of ​​the heat exchange plate 100.

[0110] In the above technical solution, by making the sum of the opening areas of the multiple avoidance through holes 110 account for about 10% of the area of ​​the heat exchange plate 100, it is beneficial to increase the opening area of ​​the avoidance through holes 110, thereby improving the avoidance effect of the avoidance through holes 110 on the pressure relief valve. In addition, it is beneficial to reduce the risk that the heat exchange area of ​​the heat exchange plate 100 will be small due to the avoidance through holes 110 occupying too much space on the heat exchange plate 100, and to improve the heat exchange efficiency of the heat exchange plate 100.

[0111] Please combine Figure 3 , Figure 5 , Figure 7 and Figure 10 In the embodiments of this application, a plurality of clearance through holes 110 arranged at intervals along a first direction constitute a through hole group 111. There are multiple through hole groups 111, and the multiple through hole groups 111 are arranged at intervals along a second direction. The distance between two adjacent through hole groups 111 is greater than the distance between two adjacent clearance through holes 110 in the through hole group 111. The flange 120 includes two flange segments 121 arranged opposite to each other along a second direction, and the second direction is perpendicular to the first direction.

[0112] It should be noted that "second direction" can be understood as the length or width direction of the heat exchange plate 100. For a specific direction illustration, please refer to [reference needed]. Figure 3 , Figure 5 , Figure 7 and Figure 10As shown. For example, the first direction is the length direction of the heat exchange plate 100, and the second direction is the width direction of the heat exchange plate 100; or, the first direction is the width direction of the heat exchange plate 100, and the second direction is the length direction of the heat exchange plate 100.

[0113] In the above technical solution, by making the spacing between two adjacent sets of through holes 111 greater than the spacing between two adjacent avoidance through holes 110 in the through hole set 111, it is beneficial to make the arrangement of the avoidance through holes 110 compatible with the arrangement of the pressure relief valve on the battery cell 210, thereby improving the avoidance effect of the avoidance through holes 110 on the corresponding avoidance of the pressure relief valve. At the same time, by making the flange 120 include two flange sections 121 arranged opposite to each other along the second direction, it is beneficial to improve the processing convenience of the flange sections 121, thereby improving the processing convenience of the heat exchange plate 100.

[0114] For example, each group of through holes 111 can be provided with at least one group of battery packs 220. Each group of battery packs 220 includes multiple battery cells 210 arranged sequentially along a first direction. Each battery cell 210 is provided with a pressure relief valve. The thickness direction of the battery cells 210 in each group of battery packs 220 is parallel to the first direction, and the length direction of the battery cells 210 in each group of battery packs 220 is parallel to the second direction. That is, the size of the battery cell 210 in the first direction is smaller than the size of the battery cell 210 in the second direction. Based on this arrangement of the battery cells 210, the distance between two adjacent groups of through holes 111 needs to be greater than the distance between two adjacent bypass through holes 110 in the through hole group 111, so that the arrangement of the bypass through holes 110 can be adapted to the arrangement of the battery cells 210, thereby facilitating the corresponding setting of the bypass through holes 110 with the pressure relief valve on the battery cell 210.

[0115] Furthermore, please combine Figure 3 , Figure 5 , Figure 7 and Figure 10 Each bypass through hole 110 is provided with a flange 120, which includes two flange segments 121 that are opposite to each other and spaced apart along the second direction. Since the distance between two adjacent through hole groups 111 is greater than the distance between two adjacent bypass through holes 110 in the through hole group 111, that is, the space between two adjacent through hole groups 111 that can be used to arrange the flange 120 is greater than the space between two adjacent bypass through holes 110. Therefore, by making the flange segments 121 provided with each bypass through hole 110 opposite to each other in the second direction, it is beneficial to improve the processing convenience of the flange 120.

[0116] Please refer to Figure 3 , Figure 5 and Figure 7In the embodiments of this application, the width of the flange 120 in the radial direction of the avoidance through hole 110 is x, the avoidance through hole 110 is a circular hole with a diameter of r, r / 4≤x≤d / 2; or, the avoidance through hole 110 is a square hole with a width of d, d / 4≤x≤d / 2.

[0117] In the above technical solution, by making the dimensional relationship between the width x of the flange 120 and the diameter r of the clearance through hole 110 formed as a circular hole satisfy the relationship: r / 4≤x≤d / 2, or by making the dimensional relationship between the width of the flange 120 and the width d of the clearance through hole 110 formed as a square hole satisfy: d / 4≤x≤d / 2, it is beneficial to make the width dimension of the flange 120 match the dimension of the clearance through hole 110, which is beneficial to improve the strengthening effect of the flange 120 on the heat exchange plate 100. At the same time, it is beneficial to reduce the risk that the flange 120 is inconvenient to process due to its excessive width dimension, and it is also beneficial to reduce the risk that the flange 120 affects the arrangement of the cavity 101.

[0118] For example, refer to Figure 7 The through hole 110 is formed as a circular hole, and the flange 120 extends into a closed ring along the circumferential direction of the through hole 110. The diameter of the through hole 110 is defined as r, and the dimension of the flange 120 in the radial direction of the through hole 110 is defined as the width x of the flange 120, where r / 4≤x≤r / 2. By designing the relationship between the width dimension of the flange 120 and the diameter of the through hole 110, it is beneficial to make the width dimension of the flange 120 match the opening size of the through hole 110, thereby improving the strengthening effect of the flange 120 on the heat exchange plate 100, facilitating the processing of the flange 120, and reducing the risk of the flange 120 affecting the arrangement of the cavity 101.

[0119] When x < r / 4, the width of the flange 120 is small, which makes the strengthening effect of the flange 120 on the heat exchange plate 100 located at the edge of the clearance through hole 110 limited. Considering that the flange 120 and the groove 104 (which can also be understood as the cavity 101) need to be set at intervals, when x > r / 2, the width of the flange 120 is large, which will affect the setting of the groove 104 on the heat exchange plate 100, and will easily increase the processing difficulty of the flange 120. It will also easily cause the flange 120 to block the clearance through hole 110 arranged adjacent to it.

[0120] In other embodiments, reference is made to Figure 3 and Figure 5The through hole 110 is formed as a square hole. The dimension of the through hole 110 in the second direction is defined as the width dimension of the through hole 110. This can also be understood as the dimension of the shorter side of the through hole 110 being the width dimension of the through hole 110. Flanges 120 are provided on both sides of the through hole 110 in the second direction. The dimension of the flange 120 in the second direction is defined as the width dimension x of the flange 120. Alternatively, flanges 120 can be provided on both sides of the through hole 110 in both the first and second directions. Each of the flanges 120 located on both sides of the through hole 110 in the first direction... The dimension of each flange 120 in the first direction is defined as the width dimension x of the flange 120. The dimension of each flange 120 located on both sides of the avoidance through hole 110 in the second direction is defined as the width dimension x of the flange 120 in the second direction, d / 4≤x≤d / 2. By designing the correlation between the width dimension of the flange 120 and the width dimension of the avoidance through hole 110, it is beneficial to make the width dimension of the flange 120 match the opening size of the avoidance through hole 110, thereby improving the strengthening effect of the flange 120 on the heat exchange plate 100 and facilitating the processing of the flange 120.

[0121] When x < d / 4, the width of the flange 120 is small, which makes the strengthening effect of the flange 120 on the heat exchange plate 100 located at the edge of the avoidance through hole 110 limited. Considering that the flange 120 and the groove 104 (which can also be understood as the cavity 101) need to be set at intervals, when x > d / 2, the width of the flange 120 is large, which will affect the arrangement of the groove 104 on the heat exchange plate 120, and will easily increase the processing difficulty of the flange 120. It will also easily cause the flange 120 to block the avoidance through hole 110 arranged next to it.

[0122] Please refer to Figure 9 In the embodiments of this application, the cavity 101 has a medium outlet (not shown) and a medium inlet (not shown). The heat exchange plate 100 includes a first plate 102 and a second plate 103 stacked along its thickness direction. The first plate 102 and the second plate 103 are separate parts. At least one of the first plate 102 and the second plate 103 has a groove 104 formed on its surface facing the other, so that the cavity 101 is defined between the first plate 102 and the second plate 103. The flange 120 is integrally connected to the side of the first plate 102 opposite to the second plate 103, or the flange 120 is integrally connected to the side of the second plate 103 opposite to the first plate 102.

[0123] In the above technical solution, by making the first plate 102 and the second plate 103 separate components, it is beneficial to reduce the manufacturing difficulty of the heat exchange plate 100. At least one of the first plate 102 and the second plate 103 has a groove 104 formed on the surface facing the other, so that the interior of the heat exchange plate 100 can define a cavity 101 for filling the heat exchange medium. By making the flange 120 integrally connected to the side of the first plate 102 away from the second plate 103, or by making the flange 120 integrally connected to the side of the second plate 103 away from the first plate 102, it is beneficial to reduce the risk of insufficient filling of the heat exchange medium due to the flange 120 occupying the space in the cavity 101, thereby improving the heat exchange effect of the heat exchange plate 100 on the battery cell 210.

[0124] For example, refer to Figure 9 The first plate 102 can form a groove 104 that is recessed away from the second plate 103. The first plate 102 and the second plate 103 can be engaged in the thickness direction of the heat exchange plate 100 so that a cavity 101 can be defined between the first plate 102 and the second plate 103.

[0125] In some other embodiments, the second plate 103 may form a groove 104 that is recessed away from the first plate 102, and the first plate 102 and the second plate 103 may be engaged in the thickness direction of the heat exchange plate 100 so that a cavity 101 can be defined between the first plate 102 and the second plate 103.

[0126] The flange 120 can be integrally connected to the side of the first plate 102 away from the second plate 103, which helps to reduce the risk of the flange 120 occupying the space in the cavity 101, thereby helping to increase the filling amount of heat exchange medium in the cavity 101 and improve the heat exchange effect of the heat exchange plate 100 on the battery cell 210.

[0127] The flange 120 can be integrally connected to the side surface of the second plate 103 opposite to the first plate 102, which helps to reduce the risk of the flange 120 occupying the space in the cavity 101, thereby helping to increase the filling amount of heat exchange medium in the cavity 101, and thus helping to improve the heat exchange effect of the heat exchange plate 100 on the battery cell 210.

[0128] It is understandable that the arrangement of the groove 104 and the flange 120 can be determined according to actual production requirements, and no specific limitation is made here.

[0129] In some embodiments, the medium outlet and the medium inlet are respectively disposed through one side of the heat exchange plate 100 along the thickness direction of the heat exchange plate 100, and the medium outlet and the medium inlet are spaced apart and respectively communicate with the cavity 101. The heat exchange medium can be transported into the cavity 101 through the medium inlet, and the heat exchange medium in the cavity 101 can be discharged from the cavity 101 through the medium outlet.

[0130] Reference Figure 9 In the embodiments of this application, the first plate 102 is formed with a groove 104, the thickness t of the first plate 102 satisfies 1mm≤t≤1.5mm, the surface of the second plate 103 facing the first plate 102 is flat, the first plate 102 and the second plate 103 are welded and fixed, and the flange 120 is integrally connected to the side of the first plate 102 away from the second plate 103.

[0131] In the above technical solution, by integrally connecting the flange 120 to the side of the first plate 102 that is away from the second plate 103, the flange 120 can be applied to heat exchange plates 100 with smaller thickness and structural features such as grooves 104 (or cavities 101) that cannot be set around the through holes 110, thereby improving the processing convenience and structural strength of the heat exchange plate 100.

[0132] For example, a groove 104 is formed on the side of the first plate 102 facing the second plate 103, which is recessed in the direction away from the second plate 103. The surface of the second plate 103 facing the first plate 102 is formed as a plane. After the first plate 102 and the second plate 103 are stacked in the thickness direction, a cavity 101 for accommodating the heat exchange medium is formed between the first plate 102 and the second plate 103. After the first plate 102 and the second plate 103 are fastened together, they can be fixedly connected by welding. This is beneficial to improving the connection reliability of the first plate 102 and the second plate 103, and at the same time, it is beneficial to improve the sealing performance of the cavity 101 and reduce the risk of leakage of the heat exchange plate 100.

[0133] The thickness t of the first plate 102 satisfies 1mm≤t≤1.5mm. Since the thickness of the first plate 102 is small, it is impossible to add structural features such as groove 104 near the through hole 110 on the first plate 102. However, the process of the flange 120 is simple and can be applied to the first plate 102 with a small thickness and where it is impossible to add structural features such as groove 104 near the through hole 110, so as to improve the structural strength near the through hole 110 on the first plate 102.

[0134] Please combine Figure 2 and Figure 10Secondly, embodiments of this application also provide a battery device 200, which includes a plurality of battery cells 210. The battery device 200 also includes one of a first heat exchanger 250 and a second heat exchanger. The first heat exchanger 250 is the aforementioned heat exchange plate 100 and is disposed on the same side of all battery cells 210. The first heat exchanger 250 is thermally connected to each battery cell 210. The second heat exchanger is the aforementioned heat exchange plate 100 and is sandwiched between two adjacent battery packs 220. Each battery pack 220 includes a plurality of battery cells 210 disposed along the length direction and / or width direction of the second heat exchanger. The second heat exchanger is thermally connected to the battery packs 220 on both sides of its thickness.

[0135] In the above technical solution, the arrangement of multiple battery cells 210 enables the battery device 200 to provide higher voltage and capacity, which is beneficial to improving the charging efficiency of the battery device 200 for the power-consuming device 1000. When the battery device 200 includes a first heat exchanger 250, by placing the first heat exchanger 250 on the same side of all battery cells 210, the first heat exchanger 250 can exchange heat with all battery cells 210, which helps to reduce the number of components in the battery device 200, thereby improving the production and processing efficiency of the battery device 200; the battery device 200 includes a second heat exchanger. In this way, by sandwiching the second heat exchanger between two adjacent battery packs 220, each second heat exchanger can exchange heat between the two battery packs 220 respectively, which helps to improve the heat exchange efficiency of the battery packs 220, thereby reducing the risk of thermal runaway of the battery device 200. In addition, since the first heat exchanger 250 and the second heat exchanger are both the heat exchange plate 100 mentioned above, it helps to ensure the structural strength of the first heat exchanger 250 and the second heat exchanger, reduce the risk of damage to the first heat exchanger 250 and the second heat exchanger, and at the same time improve the manufacturing and processing convenience of the battery device 200.

[0136] Please combine Figure 2 , Figure 10 as well as Figure 11 In the embodiments of this application, the battery device 200 includes a first heat exchanger 250 and a housing 230. The first heat exchanger 250 is disposed between the bottom wall of the housing 230 and the battery cell 210. A discharge channel 260 communicating with the clearance through hole 110 is formed between the first heat exchanger 250 and the bottom wall of the housing 230.

[0137] In the above technical solution, by placing the first heat exchanger 250 between the bottom wall of the housing 230 and the battery cell 210, and forming a discharge channel 260 communicating with the clearance through hole 110 between the first heat exchanger 250 and the bottom wall of the housing 230, pressure relief from the bottom of the battery device 200 can be achieved. This is beneficial to improving the safety of the battery device 200 during pressure relief, and also beneficial to reducing the impact on other components (such as electrical units) inside the battery device 200 when the battery cell 210 experiences thermal runaway, thereby improving the safety of the battery device 200.

[0138] For example, a pressure relief valve is provided on the side of the battery cell 210 facing the bottom wall of the housing 230. The first heat exchanger 250 is disposed between the bottom wall of the housing 230 and the battery cell 210. The clearance through hole 110 on the first heat exchanger 250 is disposed opposite to the pressure relief valve. At the same time, the first heat exchanger 250 and the bottom wall of the housing 230 together define the discharge channel 260. Each clearance through hole 110 is connected to the clearance channel.

[0139] When the internal pressure of the battery cell 210 is too high, the pressure relief valve can release the gas inside the battery cell 210. The gas discharged from the pressure relief valve can pass through the clearance through hole 110 and the clearance channel in sequence and be discharged from the battery device 200 to reduce the risk of deflagration of the battery device 200.

[0140] Please refer to Figure 10 In the embodiments of this application, the battery device 200 further includes a support structure 240, which is disposed in the discharge channel 260 and abuts against the bottom wall of the housing 230 and the first heat exchanger 250. The support structure 240 is provided to avoid the through hole 110.

[0141] In the above technical solution, by setting the support structure 240, it is easy to form an exhaust channel 260 between the bottom wall of the housing 230 and the first heat exchanger 250. By further setting the support structure 240 to avoid the through hole 110, it is beneficial to reduce the risk of the battery cell 210 being affected by the support structure 240 blocking the through hole 110.

[0142] For example, the support structure 240 is disposed inside the housing 230, and the support structure 240 can be supported between the bottom wall of the housing 230 and the first heat exchanger 250, so that the bottom wall of the housing 230 and the first heat exchanger 250 can be spaced apart, thereby forming a discharge channel 260 between the bottom wall of the housing 230 and the first heat exchanger 250.

[0143] In the thickness direction parallel to the first heat exchanger 250, the front projection plane of the support structure 240 is offset from the front projection plane of the avoidance through hole 110, so that the support structure 240 avoids the avoidance through hole 110, reducing the risk of the battery cell 210 being affected by the support structure 240 blocking the avoidance through hole 110.

[0144] In some embodiments, the support structure 240 may be constructed as a support beam. In other embodiments, the support structure 240 may be constructed as a support block. It is understood that the specific construction of the support structure 240 can be determined according to actual production requirements, and is not specifically limited here.

[0145] Please refer to Figure 10 In some embodiments of this application, the battery device 200 includes two first heat exchangers 250. One of the two first heat exchangers 250 is disposed between the bottom wall of the housing 230 and the battery cell 210, and the other of the two first heat exchangers 250 is disposed between the top wall of the housing 230 and the battery cell 210. This is beneficial to improving the heat exchange efficiency of the battery cell 210 in the battery device 200, thereby improving the charge and discharge performance of the battery device 200.

[0146] Please refer to Figure 2 In the embodiments of this application, the housing 230 may include a first sub-box 230a and a second sub-box 230b. The first sub-box 230a and the second sub-box 230b are fastened together and can be fixedly connected by threaded connectors (such as bolts or screws). The first sub-box 230a and the second sub-box can jointly define a receiving cavity for accommodating the heat exchange plate 100, the battery cell 210 and the support structure 240.

[0147] For example, refer to Figure 2 The first sub-box 230a and the second sub-box 230b can both be hollow structures with an opening on one side. The opening side of the first sub-box 230a covers the opening side of the second sub-box 230b to form a box 230 with a receiving cavity. Alternatively, the second sub-box 230b can be a hollow structure with an opening at one end, and the first sub-box 230a can be formed as a plate-like structure, covering the opening side of the second sub-box 230b so that the first sub-box 230a and the second sub-box 230b together define the receiving cavity. It is understood that the box 230 can be of various shapes, such as a cylinder or a cuboid.

[0148] In the battery device 200, multiple battery cells 210 can be connected in series, parallel, or in a mixed configuration. A mixed configuration refers to multiple battery cells 210 being connected in both series and parallel configurations. Multiple battery cells 210 can be directly connected in series, parallel, or in a mixed configuration, and then the entire assembly of the multiple battery cells 210 is housed within the casing 230. Alternatively, the battery device 200 can also be in the form of a battery pack 220 composed of multiple battery cells 210 first connected in series, parallel, or in a mixed configuration, and then the multiple battery packs 220 are connected in series, parallel, or in a mixed configuration to form a whole, which is then housed within the casing 230. The battery device 200 may also include other structures, such as busbars for electrical connections between the multiple battery cells 210.

[0149] Please refer to Figure 1 Thirdly, this application also provides an electrical device 1000 and a battery device 200 for providing electrical energy.

[0150] In the above technical solution, since the power device 1000 is equipped with the battery device 200, and the heat exchange plate 100 in the battery device 200 has good structural strength and good processing convenience, it is beneficial to improve the service life and processing convenience of the power device 1000.

[0151] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other.

[0152] The above are merely preferred embodiments of this application and are not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A heat exchange plate, characterized in that The heat exchange plate is provided with a cavity for accommodating heat exchange medium to regulate the temperature of the battery cell, and is further provided with a relief through hole arranged separately from the cavity, the relief through hole penetrates the heat exchange plate along the thickness direction of the heat exchange plate and is adapted to be opposite to the pressure relief valve of the battery cell, and the heat exchange plate is integrally connected with a flange at one end of the relief through hole in the axial direction.

2. The heat exchange plate according to claim 1, characterized in that The flange abuts against one side of the thickness of the heat exchange plate, so that the thickness direction of the flange is consistent with the thickness direction of the heat exchange plate.

3. The heat exchange plate according to claim 1, characterized in that The flange extends along the circumference of the relief through hole to form a closed ring, or the flange includes a plurality of flange segments arranged at intervals along the circumference of the relief through hole.

4. The heat exchange plate according to claim 1, characterized in that The relief through hole is a circular hole, an elliptical hole or a polygonal hole.

5. The heat exchange plate of claim 1, wherein The relief through hole is a circular hole, and the flange extends along the circumference of the relief through hole to form a closed ring; or The relief through hole is a square hole, and the flange includes four flange segments arranged at intervals along the circumference of the relief through hole; or The relief through hole is a square hole, and the flange includes two oppositely arranged flange segments.

6. The heat exchange plate according to claim 1, characterized in that The relief through holes are arranged at intervals, and the distance between adjacent two relief through holes is greater than or equal to 12 mm, the flanges corresponding to adjacent two relief through holes are arranged at intervals, and / or the flanges corresponding to adjacent two relief through holes are partially overlapped along the thickness direction of the heat exchange plate.

7. The heat exchange plate according to claim 6, characterized in that A plurality of relief through holes arranged at intervals along a first direction form a group of through hole groups, a plurality of groups of through hole groups are arranged at intervals along a second direction, the distance between adjacent two groups of through hole groups is greater than the distance between adjacent two relief through holes in the group of through hole groups, the flange includes two flange segments arranged oppositely along the second direction, and the second direction is perpendicular to the first direction.

8. The heat exchange plate according to claim 1, characterized in that The width of the flange in the radial direction of the relief through hole is x, The relief through hole is a circular hole with a diameter of r, and r / 4≤x≤r / 2; or The relief through hole is a square hole with a width of d, and d / 4≤x≤d / 2.

9. The heat exchanger plate according to any of claims 1-8, characterised in that The cavity has a medium outlet and a medium inlet, The heat exchange plate includes a first plate body and a second plate body stacked along the thickness direction thereof, the first plate body and the second plate body are separate parts, at least one of the first plate body and the second plate body is provided with a groove on the surface facing the other, so that the cavity is defined between the first plate body and the second plate body, The flange is integrally connected to one side of the first plate body away from the second plate body, or the flange is integrally connected to one side of the second plate body away from the first plate body.

10. The heat exchange plate according to claim 9, characterized in that The first plate body is provided with the groove, the thickness t of the first plate body satisfies 1mm≤t≤1.5mm, the surface of one side of the second plate body facing the first plate body is a plane, the first plate body and the second plate body are welded and fixed, and the flange is integrally connected to one side of the first plate body away from the second plate body.

11. A battery device characterized by comprising: The battery device includes a plurality of battery cells, and the battery device further includes one of a first heat exchange member and a second heat exchange member, The first heat exchange member is a heat exchange plate according to any one of claims 1-10, and is disposed on the same side of all the battery cells, and is in heat conduction cooperation with each of the battery cells; The second heat exchange member is a heat exchange plate according to any one of claims 1-10, and is sandwiched between two adjacent groups of battery groups, each of the battery groups comprising a plurality of battery cells arranged along the length direction and / or the width direction of the second heat exchange member, and the second heat exchange member is in heat conduction cooperation with the battery groups on both sides of the thickness of the second heat exchange member.

12. The battery device of claim 11, wherein, The battery device comprises a first heat exchange member, and further comprises a box body, the first heat exchange member is disposed between the bottom wall of the box body and the battery cells, and a discharge channel in communication with the avoiding through hole is formed between the first heat exchange member and the bottom wall of the box body.

13. The battery device of claim 12, wherein, The battery device further comprises a support structure, the support structure is disposed in the discharge channel and abuts between the bottom wall of the box body and the first heat exchange member, and the support structure avoids the avoiding through hole.

14. An electrical device, comprising: The battery device according to any one of claims 11-13 is used to provide electric energy.

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