Heat exchange assembly, battery pack and electric device

Abstract

The invention provides a heat exchange assembly, a battery pack and an electric device, the heat exchange assembly comprises a first heat exchange plate and a second heat exchange plate, the first heat exchange plate is internally provided with a first flow channel and a second flow channel which allow a heat exchange medium to flow along a first direction, the first flow channel is provided with a liquid outlet, and the second flow channel is provided with a liquid inlet; the first flow channel is isolated from the second flow channel, and the area, provided with the first flow channel, of the first heat exchange plate is used for conducting heat exchange with a first object to be cooled; the second heat exchange plate is connected with the first heat exchange plate, the second heat exchange plate and the first heat exchange plate are located on the same horizontal plane, the second heat exchange plate is used for conducting heat exchange with a second to-be-cooled object, the temperature of the first to-be-cooled object is higher than that of the second to-be-cooled object, and a third flow channel allowing a heat exchange medium to flow is formed in the second heat exchange plate. The third flow channel is communicated with the first flow channel and the second flow channel so as to allow the heat exchange medium to flow to the liquid outlet of the first flow channel from the liquid inlet of the second flow channel through the third flow channel, and the heat exchange capacity is improved.

Description

Technical Field

[0001] The present invention relates to the field of battery technology, and in particular to a heat exchange component, a battery pack and an electrical device. Background Art

[0002] At present, the requirements for power battery charging rate are getting higher and higher, requiring power batteries to have high-rate charging in order to bring faster charging rates. However, when power batteries are charged and discharged at high rates, the temperature rise of battery cells and other components under charging and discharging conditions is also receiving more and more attention.

[0003] BDU (Battery Disconnect Unit) is an indispensable key component in the battery pack. The internal electrical components are connected in series and parallel through a bus. The fast charging condition puts higher demands on the current carrying capacity of the bus. In order to ensure the current carrying capacity of the bus at high-rate charging and discharging, it is necessary to increase the bus current carrying cross-sectional area, which will inevitably thicken or widen the size of the bus. At the same time, under high-rate charging and high-power discharging conditions, the bus also has a temperature rise problem. Therefore, how to solve the heat exchange problem of battery cells and their components in the existing power battery pack is a technical problem that needs to be solved in the battery field. Summary of the invention

[0004] The object of the present invention is to provide a heat exchange assembly, a battery pack and an electrical device to solve the technical problem of poor heat exchange efficiency of battery cells and components in the battery pack in the prior art.

[0005] To achieve the above purpose, the technical solution adopted in this application is:

[0006] In a first aspect, the present application provides a heat exchange component, comprising: a first heat exchange plate and a second heat exchange plate, wherein the first heat exchange plate has a first flow channel and a second flow channel allowing a heat exchange medium to flow along a first direction inside, wherein the first flow channel has a liquid outlet, and the second flow channel has a liquid inlet, the first flow channel and the second flow channel are isolated, and the area of ​​the first heat exchange plate where the first flow channel is provided is used for heat exchange with a first object to be cooled; the first direction is the thickness direction of the first heat exchange plate; the second heat exchange plate is connected to the first heat exchange plate and is located on the same horizontal plane as the first heat exchange plate, the second heat exchange plate is used for heat exchange with a second object to be cooled, the temperature of the first object to be cooled is higher than the temperature of the second object to be cooled, and the second heat exchange plate has a third flow channel allowing a heat exchange medium to flow inside, wherein the third flow channel is respectively connected to the first flow channel and the second flow channel to allow the heat exchange medium to flow from the liquid inlet of the second flow channel through the third flow channel to the liquid outlet of the first flow channel.

[0007] In one or more embodiments of the present application, the area of ​​the first heat exchange plate where the first flow channel is provided contacts the side surface of the first object to be cooled so as to exchange heat with the first object to be cooled; the area of ​​the second heat exchange plate where the third flow channel is provided contacts the side surface of the second object to be cooled so as to exchange heat with the second object to be cooled.

[0008] In one or more embodiments of the present application, an isolation cavity is provided inside the first heat exchange plate and between the first flow channel and the second flow channel along the first direction, and the isolation cavity is used to isolate the first flow channel from the second flow channel.

[0009] In one or more embodiments of the present application, a thermal insulation member is accommodated in the isolation cavity.

[0010] In one or more embodiments of the present application, the first heat exchange plate is provided with at least one first diversion port on the side of the second flow channel facing the third flow channel, and the second heat exchange plate is provided with a second diversion port connected to the first diversion port, so that the second flow channel and the third flow channel are connected;

[0011] The first heat exchange plate is provided with a first return port on the side of the first flow channel facing the third flow channel, and the second heat exchange plate is provided with a second return port connected to the first return port, so that the third flow channel is connected to the first flow channel.

[0012] In one or more embodiments of the present application, a heat conducting member is provided between the contact surface of the first heat exchange plate and the first object to be cooled.

[0013] In a second aspect, the present application also provides a battery pack, comprising:

[0014] BDU module;

[0015] a battery module; and,

[0016] The heat exchange assembly as described in any one of the first aspects, wherein the area of ​​the first heat exchange plate of the heat exchange assembly having the first flow channel is supported below the BDU module to perform heat exchange with the BDU module, and the area of ​​the second heat exchange plate of the heat exchange assembly having the third flow channel is supported below the battery module to perform heat exchange with the battery module.

[0017] In one or more embodiments of the present application, the battery pack further includes a box having a receiving cavity for receiving the battery module;

[0018] The first heat exchange plate further includes a bracket, which surrounds the BDU module and is disposed on a surface of the first heat exchange plate close to the first flow channel along a first direction, and the bracket is connected to the box body;

[0019] The bracket is provided with a high-voltage plug-in and a low-voltage plug-in, and the high-voltage plug-in and the low-voltage plug-in are respectively connected to the BDU module.

[0020] In one or more embodiments of the present application, the BDU module includes a housing and a protection device disposed inside the housing, and a region of the first heat exchange plate provided with the first flow channel is supported on the bottom of the housing;

[0021] The shell has a heat dissipation hole reserved on the contact surface with the first heat exchange plate. The protection device includes a bus. The bus is connected to a heat dissipation part in the direction of the heat dissipation hole. The heat dissipation hole is used to accommodate the heat dissipation part and make the heat dissipation part contact with the first heat exchange plate for heat exchange.

[0022] In a third aspect, the present application further provides an electrical device, comprising the battery pack described in any one of the second aspects.

[0023] Based on the above technical solution, a heat exchange assembly, a battery pack and an electrical device of the present application have at least the following beneficial technical effects:

[0024] The heat exchange assembly provided by the present application is provided with a first heat exchange plate and a second heat exchange plate which are connected to each other, and the first heat exchange plate is used to exchange heat with a first object to be radiated with a higher temperature, and the second heat exchange plate is used to exchange heat with a second object to be radiated with a lower temperature. The first heat exchange plate is provided with a first flow channel and a second flow channel allowing a heat exchange medium to flow, and the first flow channel and the second flow channel are isolated from each other to avoid the internal heat exchange medium affecting each other, and the second heat exchange plate is provided with a third flow channel. By allowing the heat exchange medium to flow from a liquid inlet of the second flow channel to a liquid outlet of the first flow channel after passing through the third flow channel, the heat exchange medium can first exchange heat with the second object to be radiated with a lower temperature and then exchange heat with the first object to be radiated with a higher temperature, thereby avoiding the influence of the first object to be radiated with a higher temperature on the second object to be radiated with a lower temperature, meeting the demand for simultaneous heat exchange of multiple components with a large temperature difference, improving the heat exchange capacity, and the first heat exchange plate and the second heat exchange plate share a set of heat exchange system, avoiding the risk of pipeline leakage.

[0025] The battery pack provided by the present application includes a BDU module, a battery module and the aforementioned heat exchange assembly, wherein the first heat exchange plate of the heat exchange assembly is provided with a first flow channel area supported below the BDU module to perform heat exchange with the BDU module, and the second heat exchange plate of the heat exchange assembly is provided with a third flow channel area supported below the battery module to perform heat exchange with the battery module. Thus, the heat exchange medium can first perform heat exchange with the battery module with a relatively low temperature, and then perform heat exchange with the BDU module with a higher temperature, so as to avoid the heating of the BDU module affecting the temperature of the battery module, and the first heat exchange plate and the second heat exchange plate can share a set of heat exchange system, so as to avoid the risk of pipeline leakage, improve the heat exchange capacity and reduce the cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0027] Figure 1 It is a schematic diagram of the three-dimensional structure of the heat exchange component provided in this application.

[0028] Figure 2 It is a schematic structural diagram of the first heat exchange plate provided in the present application from a top perspective.

[0029] Figure 3 It is a structural schematic diagram of the bottom perspective of the first heat exchange plate provided in this application.

[0030] Figure 4 It is a structural schematic diagram of the second heat exchange plate provided in this application.

[0031] Figure 5 It is a side view of the heat exchange assembly provided by the present application.

[0032] Figure 6 yes Figure 5 Middle AA cross section.

[0033] Figure 7 It is a schematic diagram of the structure of the battery pack (without the cover) provided in this application.

[0034] Figure 8 It is a structural diagram of the BDU module provided in this application.

[0035] Fig. 9 It is a schematic diagram of the structure of the protection device of the BDU module provided in this application.

[0036] Fig.10 It is a structural schematic diagram of the first heat exchange plate and the BDU module provided in this application.

[0037] Fig.11 It is a structural schematic diagram of the heat exchange component, BDU module and box provided in this application.

[0038] In the figure: 10-first heat exchange plate; 20-second heat exchange plate; 30-BDU module; 40-battery module; 50-housing; 60-high-pressure plug-in; 70-low-pressure plug-in; 80-seal; 101-liquid outlet; 102-liquid inlet; 103-first flow channel; 104-second flow channel; 105-first return port; 106-isolation chamber; 107-thermal insulation; 108-first diversion port; 109-bracket; 201-third flow channel; 202-second return port; 203-second diversion port; 301-housing; 302-heat dissipation through hole; 303-heat dissipation part; 304-protection device; 305-bus. DETAILED DESCRIPTION

[0039] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0040] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0041] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0042] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0043] In the related technologies, the temperature rise problem of power batteries under high-rate charging and discharging conditions above 4C has attracted more and more attention. As an indispensable key component in the battery pack, the BDU (Battery Disconnect Unit) connects the internal electrical components in series and parallel through buses (copper or aluminum buses), and the fast charging condition puts forward higher requirements on the bus's current capacity. In order to ensure the bus's current flow during high-rate charging and discharging, it is necessary to increase the bus's current flow cross-sectional area, which will inevitably thicken or widen the bus's size. Under high-rate charging and high-power discharging conditions, the bus also has a temperature rise problem. In the related technologies, the thermal management method is usually to set a cold plate separately for the BDU. Setting a cold plate separately for the BDU increases the risk of pipeline leakage and requires a large size and space.

[0044] Based on the above considerations, in order to solve the technical problem of poor heat exchange efficiency of battery cells and components in the battery pack in the prior art. The present application provides a heat exchange component, including a first heat exchange plate and a second heat exchange plate, wherein the first heat exchange plate is provided with a first flow channel and a second flow channel along a first direction inside the first heat exchange plate to allow the flow of heat exchange medium, wherein the first flow channel is provided with a liquid outlet, and the second flow channel is provided with a liquid inlet, the first flow channel and the second flow channel are isolated, and the area of ​​the first heat exchange plate provided with the first flow channel is used for heat exchange with a first heat dissipation object; the second heat exchange plate is connected to the first heat exchange plate and is located on the same horizontal plane as the first heat exchange plate, and the second heat exchange plate is used for heat exchange with a second heat dissipation object, the temperature of the first heat dissipation object is higher than the temperature of the second heat dissipation object, and the second heat exchange plate is provided with a third flow channel allowing the flow of heat exchange medium, wherein the third flow channel is respectively connected to the first flow channel and the second flow channel, so as to allow the heat exchange medium to flow from the liquid inlet of the second flow channel through the third flow channel to the liquid outlet of the first flow channel.

[0045] In the technical solution of the present application, a heat exchange component is provided with a first heat exchange plate and a second heat exchange plate which are connected to each other, and the first heat exchange plate is used to exchange heat with a first heat dissipation object with a higher temperature, and the second heat exchange plate is used to exchange heat with a second heat dissipation object with a lower temperature. The first heat exchange plate is provided with a first flow channel and a second flow channel allowing a heat exchange medium to flow, and the first flow channel and the second flow channel are isolated from each other to avoid the internal heat exchange medium from affecting each other, and the second heat exchange plate is provided with a third flow channel. By allowing the heat exchange medium to flow from a liquid inlet of the second flow channel to a liquid outlet of the first flow channel after passing through the third flow channel, the heat exchange medium can first exchange heat with the second heat dissipation object with a lower temperature and then exchange heat with the first heat dissipation object with a higher temperature, thereby avoiding the influence of the first heat dissipation object with a higher temperature on the second heat dissipation object with a lower temperature, meeting the demand for simultaneous heat exchange of multiple components with a large temperature difference, improving the heat exchange capacity, and the first heat exchange plate and the second heat exchange plate share a set of heat exchange system, thereby avoiding the risk of pipeline leakage.

[0046] The technical solution of the present application is described in detail below in conjunction with the accompanying drawings.

[0047] Please refer to Figure 1 , Figure 2 , Figure 3 and Figure 4 The embodiment of the present application provides a heat exchange component, including: a first heat exchange plate 10 and a second heat exchange plate 20, wherein the first heat exchange plate 10 has a first flow channel 103 and a second flow channel 104 along a first direction Z inside which allow a heat exchange medium to flow, wherein the first flow channel 103 has a liquid outlet 101, and the second flow channel 104 has a liquid inlet 102, the first flow channel 103 and the second flow channel 104 are isolated, and the area of ​​the first heat exchange plate 10 with the first flow channel 103 is used for heat exchange with a first object to be cooled; the second heat exchange plate 20 and the first heat exchange plate 10 are connected to each other. A heat exchange plate 10 is connected to and is located on the same horizontal plane as the first heat exchange plate 10, and the second heat exchange plate 20 is used to exchange heat with a second object to be cooled. The temperature of the first object to be cooled is higher than that of the second object to be cooled. A third flow channel 201 for allowing a heat exchange medium to flow is provided inside the second heat exchange plate 20, wherein the third flow channel 201 is respectively connected to the first flow channel 103 and the second flow channel 104 to allow the heat exchange medium to flow from the liquid inlet 102 of the second flow channel 104 to the liquid outlet 101 of the first flow channel 103 through the third flow channel 201.

[0048] The first direction Z may be a thickness direction of the first heat exchange plate 10. In some embodiments, the first object to be cooled may be a BDU module, and the second object to be cooled may be a battery module.

[0049] In the technical solution of the embodiment of the present application, a first heat exchange plate 10 and a second heat exchange plate 20 are arranged in communication, and the first heat exchange plate 10 is used to perform heat exchange with a first heat object to be radiated at a higher temperature, and the second heat exchange plate 20 is used to perform heat exchange with a second heat object to be radiated at a lower temperature. The first heat exchange plate 10 is provided with a first flow channel 103 and a second flow channel 104 allowing the flow of heat exchange medium. The first flow channel 103 and the second flow channel 104 are isolated from each other to avoid mutual influence of the internal heat exchange medium. The second heat exchange plate 20 is provided with a third flow channel 201. By allowing the heat exchange medium to flow, the heat exchange medium 103 and the second flow channel 104 are isolated from each other to avoid mutual influence of the internal heat exchange medium. The second heat exchange plate 20 is provided with a third flow channel 201. The heat exchange medium flows from the liquid inlet 102 of the second flow channel 104 to the liquid outlet 101 of the first flow channel 103 through the third flow channel 201, so that the heat exchange medium can first exchange heat with the second heat object with a lower temperature and then with the first heat object with a higher temperature, thereby avoiding the influence of the first heat object with a higher temperature on the second heat object with a lower temperature, meeting the demand for simultaneous heat exchange of multiple components with large temperature differences, improving the heat exchange capacity, and the first heat exchange plate 10 and the second heat exchange plate 20 share a heat exchange system, avoiding the risk of pipeline leakage.

[0050] The first heat exchange plate 10 and the second heat exchange plate 20 are located in the same plane, so that the first heat exchange plate 10 and the second heat exchange plate 20 can be assembled and installed as a whole to the bottom of the first heat dissipation object and the second heat dissipation object with the same height.

[0051] In some embodiments, the first heat exchange plate 10 and the second heat exchange plate 20 may be made of Al material, generally 3 series aluminum or 6 series aluminum, and the manufacturing process may be stamping followed by brazing or aluminum extruded profile flow channel plate.

[0052] In some embodiments, the area of ​​the first heat exchange plate 10 provided with the first flow channel 103 contacts the side of the first object to be cooled to exchange heat with the first object to be cooled; the area of ​​the second heat exchange plate 20 provided with the third flow channel 201 contacts the side of the second object to be cooled to exchange heat with the second object to be cooled.

[0053] In order to improve the heat exchange efficiency of the first heat dissipation object, the area of ​​the first flow channel 103 covers the contact surface between the first heat dissipation object and the first heat exchange plate 10. Figure 2 , the first flow channel 103 can be arranged in a circuitous manner to increase the heat exchange efficiency between the heat exchange medium and the first heat dissipation object. Similarly, in order to improve the heat exchange efficiency of the second heat dissipation object, the area of ​​the third flow channel 201 covers the contact surface between the second heat dissipation object and the second heat exchange plate 20. In some embodiments, please refer to Figure 4 and Figure 6 The third flow channel 201 can be arranged in a circuitous manner to increase the heat exchange efficiency between the heat exchange medium and the second heat object to be dissipated.

[0054] In the technical solution of the embodiment of the present application, the above arrangement is adopted so that the first heat exchange plate 10 and the second heat exchange plate 20 can simultaneously perform heat exchange on the first object to be cooled and the second object to be cooled having a large temperature difference, thereby improving the heat dissipation efficiency and heat exchange capacity.

[0055] Please refer to Figure 2 and Figure 3 In some embodiments, along the first direction Z, an isolation cavity 106 is provided inside the first heat exchange plate 10 and between the first flow channel 103 and the second flow channel 104 , and the isolation cavity 106 is used to isolate the first flow channel 103 from the second flow channel 104 .

[0056] The isolation cavity 106 may be a cavity structure formed by a depression inside the first heat exchange plate 10. The length of the isolation cavity 106 is greater than the length of the first flow channel 103 and the second flow channel 104, and the width of the isolation cavity 106 is greater than the width of the first flow channel 103 and the second flow channel 104. The length of the first flow channel 103 and the second flow channel 104 may be understood as the total length of the area formed by the first flow channel 103 or the second flow channel 104 on the surface of the first heat exchange plate 10, and the width of the first flow channel 103 and the second flow channel 104 may be understood as the total width of the area formed by the first flow channel 103 or the second flow channel 104 on the surface of the first heat exchange plate 10.

[0057] In the technical solution of the embodiment of the present application, through the above-mentioned setting, the isolation chamber 106 can isolate the heat exchange medium in the first flow channel 103 and the second flow channel 104, thereby preventing the heat exchange medium with a higher temperature in the first flow channel 103 from affecting the heat exchange medium with a lower temperature in the second flow channel 104, thereby reducing the heat exchange effect on the second heat dissipation object.

[0058] Please refer to Figure 2 In some embodiments, the insulation cavity 106 contains a heat insulating member 107. In some embodiments, the heat insulating member 107 may be heat insulating foam or glue with low thermal conductivity, the thermal conductivity of which is generally less than 0.1 W / (m*k), such as a foamed thermal conductive glue of a polyurethane system, the higher the foaming ratio, the lower the thermal conductivity.

[0059] In the technical solution of the embodiment of the present application, a heat insulating member 107 is filled in the isolation cavity 106 to increase the thermal resistance in the first flow channel 103 and the second flow channel 104 and reduce the heat exchange amount, thereby isolating the influence of the high-temperature heat exchange medium at the liquid outlet 101 on the temperature of the heat exchange medium at the liquid inlet 102; avoiding increasing the inlet temperature of the second heat dissipation object, such as a battery module, and reducing the heat exchange amount with the second heat dissipation object, such as a battery cell.

[0060] Please refer to Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6 In some embodiments, the first heat exchange plate 10 is provided with at least one first diversion port 108 on the side of the second flow channel 104 facing the third flow channel 201, and the second heat exchange plate 20 is provided with a second diversion port 203 connected with the first diversion port 108, so that the second flow channel 104 and the third flow channel 201 are connected; the first heat exchange plate 10 is provided with a first return port 105 on the side of the first flow channel 103 facing the third flow channel 201, and the second heat exchange plate 20 is provided with a second return port 202 connected with the first return port 105, so that the third flow channel 201 and the first flow channel 103 are connected.

[0061] Among them, Figure 4 As shown, the second diverter port 203 is disposed near the bottom surface of the third flow channel 201. The second return port 202 is disposed near the top surface of the third flow channel 201. During installation, the first diverter port 108 can be aligned with the second diverter port 203, and the second return port 202 can be aligned with the first return port 105 to assemble the first heat exchange plate 10 and the second heat exchange plate 20 together.

[0062] In the technical solution of the embodiment of the present application, through the above-mentioned arrangement, the heat exchange medium can enter the second flow channel 104 from the liquid inlet 102, enter the third flow channel 201 through the first branch port 108 of the second flow channel 104 and the second branch port 203 of the third flow channel 201, and after heat exchange with the second heat object to be dissipated, enter the first flow channel 103 through the second return port 202 and the first return port 105 of the first flow channel 103, and exchange heat with the first heat object to be dissipated, thereby improving the heat exchange capacity.

[0063] In some embodiments, a heat conducting member is provided between the contact surface of the first heat exchange plate 10 and the first heat dissipation object. The heat conducting member may be a heat-conducting insulating medium, so as to exchange heat with the first heat dissipation object such as a BDU under the premise of ensuring electrical safety, and cool the BDU in normal use; wherein the heat-conducting insulating medium is generally a heat-conducting pad, heat-conducting silica gel or heat-conducting structural adhesive; the thermal conductivity is generally ≥0.5W / (m*k), and conventional material types include silicon, polyurethane, epoxy, etc.

[0064] Please refer to Figure 7 On the other hand, the present application also provides a battery pack, comprising: a BDU module 30, a battery module 40 and any of the foregoing heat exchange components, wherein the first heat exchange plate 10 of the heat exchange component is provided with an area of ​​the first flow channel 103 supported below the BDU module 30 to perform heat exchange with the BDU module 30, and the second heat exchange plate 20 of the heat exchange component is provided with an area of ​​the third flow channel 201 supported below the battery module 40 to perform heat exchange with the battery module 40.

[0065] The battery pack of the embodiment of the present application is used for various electrical devices using batteries, and refers to a physical module including one or more battery modules to provide higher voltage and capacity.

[0066] In the technical solution of the embodiment of the present application, the heat exchange medium can first perform heat exchange with the battery module 40 with a relatively low temperature, and then perform heat exchange with the BDU module 30 with a higher temperature, so as to avoid the heating of the BDU module 30 affecting the temperature of the battery module 40, and the first heat exchange plate 10 and the second heat exchange plate 20 can share a set of heat exchange system, thereby avoiding the risk of pipeline leakage, improving the heat exchange capacity and reducing the cost. Since the temperature requirements of the BDU module 30 in the battery pack are different from those of the battery module 40; the temperature range of the bus in the BDU module 30 is generally required to be ≤130-150°C; the operating temperature range of the battery cell of the battery module 40 is generally required to be ≤55-60°C; the water temperature of the liquid inlet 102 is generally ≤25°C, and the water temperature after heat exchange with the battery module 40 is generally ≤35°C; therefore, the temperature of the heat exchange medium entering the first flow channel 103 can also effectively exchange heat with the BDU module 30, thereby improving the heat exchange capacity.

[0067] Please refer to Figure 7 and Fig.11 The battery pack further includes a box body 50 having a receiving cavity for receiving the battery module 40. The battery module 40 is installed in the receiving cavity of the box body 50. The battery module 40 includes a plurality of stacked battery cells.

[0068] Please refer to Fig.10 The first heat exchange plate 10 further includes a bracket 109, which surrounds the BDU module 30 and is disposed on the surface of the first heat exchange plate 10 close to the first flow channel 103 along the first direction Z. The bracket 109 is connected to the box 50. The BDU module 30, the first heat exchange plate 10 and the box 50 of the battery pack can be fixed by the bracket 109 to ensure that the BDU module 30, the first heat exchange plate 10, the second heat exchange plate 20 and the battery module 40 are integrated into one.

[0069] In some embodiments, a high-voltage plug-in 60 and a low-voltage plug-in 70 are disposed on the bracket 109 , and the high-voltage plug-in 60 and the low-voltage plug-in 70 are respectively connected to the BDU module 30 .

[0070] In the technical solution of the embodiment of the present application, the high-pressure plug-in 60 and the low-pressure plug-in 70 are integrated with the BDU module 30 into one module, and combined with the box body 50 as a standard liquid-cooled BDU module.

[0071] Please refer to Figure 8 , Fig. 9 and Fig.10 In some embodiments, the BDU module 30 includes a housing 301 and a protective device 304 disposed inside the housing 301, and the area of ​​the first heat exchange plate 10 provided with the first flow channel 103 is supported at the bottom of the housing 301. Figure 8 and Fig. 9The housing 301 has a heat dissipation through hole 302 reserved on the contact surface with the first heat exchange plate 10, and the protection device 304 includes a bus 305, and the bus 305 is connected to a heat dissipation part 303 in the direction of the heat dissipation through hole 302, and the heat dissipation through hole 302 is used to accommodate the heat dissipation part 303 and make the heat dissipation part 303 contact with the first heat exchange plate 10 for heat exchange. The protection device 304 also includes a relay, a fuse, a shunt, etc.

[0072] The heat dissipation through hole 302 may be a through hole reserved at the bottom of the housing 301 , and its function is to allow the heat dissipation portion 303 of the busbar 305 to be exposed from the heat dissipation through hole 302 and directly contact the heat exchange surface of the first heat exchange plate 10 .

[0073] In the technical solution of the embodiment of the present application, the heat of the bus 305 can be quickly taken away by the heat exchange medium in the first heat exchange plate 10 through the contact between the heat dissipation portion 303 of the bus 305 and the first heat exchange plate 10 to quickly reduce the temperature of the bus. On the other hand, the first heat exchange plate 10 is also in contact with the shell 301 for heat exchange, wherein the shell 301 can be made of plastic materials such as PBT, PP, ABS, or plastic materials with high thermal conductivity, thereby increasing the heat exchange capacity.

[0074] In some embodiments, the battery pack further comprises an upper cover, and a seal 80 is provided on the upper edge of the box body 50 and the upper edge of the shell 301. The seal 80 may be an integral structure, and the seal 80 may be a sealing ring. The upper cover is sealed and covered on the box body 50 and the shell 301 through the seal 80. The upper cover may also be an integral structure that covers the battery module 40 and the BDU module 30 together.

[0075] On the other hand, the present application also provides an electric device, including the battery pack. The electric device may be, but is not limited to, a mobile phone, a tablet, a laptop, an electric toy, an electric tool, a battery car, an electric car, a ship, a spacecraft, etc. Among them, the electric toy may include a fixed or mobile electric toy, for example, a game console, an electric car toy, an electric ship toy, and an electric airplane toy, etc., and the spacecraft may include an airplane, a rocket, a space shuttle, and a spacecraft, etc.

[0076] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. A heat exchange component, characterized in that: include: A first heat exchange plate (10), wherein a first flow channel (103) and a second flow channel (104) are provided inside the first heat exchange plate (10) along a first direction (Z) for allowing a heat exchange medium to flow, wherein the first flow channel (103) is provided with a liquid outlet (101), and the second flow channel (104) is provided with a liquid inlet (102), the first flow channel (103) and the second flow channel (104) are isolated from each other, and the area of ​​the first heat exchange plate (10) provided with the first flow channel (103) is used for heat exchange with a first heat object to be dissipated; the first direction (Z) is the thickness direction of the first heat exchange plate (10); The second heat exchange plate (20) is connected to the first heat exchange plate (10) and is located at the same horizontal plane as the first heat exchange plate (10). The second heat exchange plate (20) is used to perform heat exchange with a second object to be cooled. The temperature of the first object to be cooled is higher than the temperature of the second object to be cooled. The second heat exchange plate (20) is provided with a third flow channel (201) inside for allowing a heat exchange medium to flow. The third flow channel (201) is respectively connected to the first flow channel (103) and the second flow channel (104) to allow the heat exchange medium to flow from the liquid inlet (102) of the second flow channel (104) through the third flow channel (201) to the liquid outlet (101) of the first flow channel (103).

2. The heat exchange assembly according to claim 1, characterized in that: The area of ​​the first heat exchange plate (10) provided with the first flow channel (103) contacts the side surface of the first object to be cooled so as to perform heat exchange with the first object to be cooled; The area of ​​the second heat exchange plate (20) where the third flow channel (201) is provided contacts the side surface of the second object to be cooled, so as to perform heat exchange with the second object to be cooled.

3. The heat exchange assembly according to claim 1 or 2, characterized in that: Along the first direction (Z), an isolation cavity (106) is provided inside the first heat exchange plate (10) and between the first flow channel (103) and the second flow channel (104), and the isolation cavity (106) is used to isolate the first flow channel (103) from the second flow channel (104).

4. The heat exchange assembly according to claim 3, characterized in that: The isolation cavity (106) contains a heat insulation component (107).

5. The heat exchange assembly according to claim 1, characterized in that: The first heat exchange plate (10) is provided with at least one first flow diversion port (108) on the side of the second flow channel (104) facing the third flow channel (201), and the second heat exchange plate (20) is provided with a second flow diversion port (203) connected to the first flow diversion port (108), so that the second flow channel (104) and the third flow channel (201) are connected; The first heat exchange plate (10) is provided with a first return port (105) on the side of the first flow channel (103) facing the third flow channel (201), and the second heat exchange plate (20) is provided with a second return port (202) connected to the first return port (105), so that the third flow channel (201) is connected to the first flow channel (103).

6. The heat exchange assembly according to claim 1, characterized in that: A heat conducting member is provided between the contact surface of the first heat exchange plate (10) and the first object to be cooled.

7. A battery pack, characterized in that: include: BDU module (30); a battery module (40); and The heat exchange assembly according to any one of claims 1 to 6, wherein the area of ​​the first heat exchange plate (10) of the heat exchange assembly having the first flow channel (103) is supported below the BDU module (30) to perform heat exchange with the BDU module (30), and the area of ​​the second heat exchange plate (20) of the heat exchange assembly having the third flow channel (201) is supported below the battery module (40) to perform heat exchange with the battery module (40).

8. The battery pack according to claim 7, characterized in that: The battery pack also includes a box (50) having a receiving cavity for receiving the battery module (40); The first heat exchange plate (10) further comprises a bracket (109), the bracket (109) surrounds the BDU module (30) and is arranged on a surface of the first heat exchange plate (10) close to the first flow channel (103) along the first direction (Z), and the bracket (109) is connected to the box (50); The bracket (109) is provided with a high-voltage plug-in (60) and a low-voltage plug-in (70), and the high-voltage plug-in (60) and the low-voltage plug-in (70) are respectively connected to the BDU module (30).

9. The battery pack according to claim 7, characterized in that: The BDU module (30) comprises a shell (301) and a protective device (304) arranged inside the shell (301); the area of ​​the first heat exchange plate (10) where the first flow channel (103) is provided is supported at the bottom of the shell (301); The shell (301) is provided with a heat dissipation through hole (302) on the contact surface with the first heat exchange plate (10); the protective device (304) comprises a bus bar (305); the bus bar (305) is connected with a heat dissipation portion (303) in the direction of the heat dissipation through hole (302); the heat dissipation through hole (302) is used to accommodate the heat dissipation portion (303) and enable the heat dissipation portion (303) to contact with the first heat exchange plate (10) for heat exchange.

10. An electrical device, characterized in that: include: A battery pack as claimed in any one of claims 7 to 9.

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