Cold plate structure of integrated heating device, power battery thermal management system and vehicle

Abstract

The invention relates to a cold plate structure of an integrated heating device, a power battery thermal management system and a vehicle, and relates to the technical field of power battery thermal management, the cold plate structure of the integrated heating device comprises a runner plate, a heating device and an upper layer plate, a first surface of the runner plate is provided with a runner; the heating device is arranged on the second surface of the runner plate; the upper-layer plate is arranged on one side, far away from the heating device, of the runner plate; and the orthographic projection of the heating device on the first surface of the runner plate is overlapped with the orthographic projection of the runner on the first surface of the runner plate. The heating device is integrated in the cold plate structure, the adhesive area of the battery cell and the cold plate structure is not occupied, meanwhile, the risk that the battery cell falls off is reduced, direct contact between the heating device and the battery cell is avoided, the problem of thermal runaway caused by overheating of the battery cell due to dry burning of the heating device is further avoided, and the heat utilization rate is increased; meanwhile, the heat exchange efficiency of the runner and a heating device is improved, and the temperature uniformity of the runner plate is guaranteed.

Description

Technical Field

[0001] The present invention relates to the technical field of power battery thermal management, and in particular to a cold plate structure with an integrated heating device, a power battery thermal management system and a vehicle. Background Art

[0002] New energy vehicles are an inevitable choice for the development of a low-carbon economy and a development trend of the automobile industry. In recent years, China's new energy vehicles have developed rapidly and have become a highlight area of ​​technological innovation and industrial upgrading. As the "heart" of new energy vehicles, power batteries have become their core competitiveness. Optimization of battery thermal management structure is a key link. Excellent thermal management methods can improve the battery operating environment, extend battery life, and even avoid the occurrence of thermal runaway.

[0003] At present, the cooling and heating methods in the field of power battery thermal management mainly include liquid cooling and liquid heating, liquid cooling and electric heating, direct cooling and direct heating, direct cooling and electric heating, etc. Among them, based on the limitation of the layout space of the whole vehicle and the consideration of factors such as cost, it is necessary to have a thermal management solution with both cold plates and heating components. In the existing technology, the cold plate is generally placed at the bottom of the battery cell, and the heating component is arranged on the side or bottom of the battery. For example, in patent CN216980685.U, the heating film is pasted and arranged on the side of the battery cell. However, this arrangement will not only reduce the space utilization of the whole vehicle, but also cause foreign matter to be generated on the surface of the heating film, resulting in poor contact and dry burning. The adhesive between the heating film and the battery cell is prone to aging and failure, and at the same time increases the risk of the heating film falling off, affecting the working efficiency of the battery cell and poor temperature uniformity. For another example, in patent CN116666835.A, the intermediate heat exchange plate is connected with the direct cooling plate to form a closed cavity suitable for the flow of refrigerant. This arrangement is not conducive to the subsequent maintenance and replacement of the intermediate heat exchange plate, and the wiring harness end of the intermediate heat exchange plate needs to pass through the beam system inside the battery box, weakening the overall structural strength. According to simulation calculations, in order to ensure the reliability of the battery box structure, it is necessary to ensure that the battery cell and the cold plate have a bonding rate of no less than 40%, so it is impossible to arrange the heating film at the bottom of all the batteries. When the area of ​​the heating film is limited under the same power, its heating performance will be seriously affected, resulting in failure to meet the thermal management requirements of the power battery. Summary of the invention

[0004] The purpose of the present invention is to provide a cold plate structure with integrated heating devices, a power battery thermal management system and a vehicle, which are used to solve the integration method of the heating components in the prior art, the interference between the heating components and the frame beam system of the power battery box, the risk of separation of the battery cells and the heating components due to aging and failure of the adhesive between the battery cells and the heating components, and the problem of dry burning caused by foreign matter being easily present on the surface of the heating components without protection. While improving the heat utilization rate, the heat exchange efficiency between the flow channel and the heating component is improved, thereby ensuring the temperature uniformity of the flow channel plate.

[0005] In order to achieve the above object, the technical solution adopted by the present invention is as follows:

[0006] In the first aspect, the present application provides a cold plate structure with an integrated heating device, which includes a flow channel plate, a heating device and an upper plate, wherein a plurality of flow channels are arranged on the first surface of the flow channel plate; the heating device is arranged on the second surface of the flow channel plate; the upper plate is arranged on the side of the flow channel plate away from the heating device; and the orthographic projection of the heating device on the first surface of the flow channel plate overlaps with the orthographic projection of the flow channel on the first surface of the flow channel plate.

[0007] Based on the above scheme, some embodiments of the present application provide a cold plate structure with an integrated heating device, wherein the cold plate structure with an integrated heating device integrates the heating device on the second surface of the flow channel plate of the cold plate structure. This arrangement can improve the space utilization of the power battery thermal management system, and will not occupy the adhesive area between the battery cell and the cold plate structure, and also reduce the risk of the battery cell falling off. At the same time, it solves the problem of foreign matter generated on the surface of the heating component in direct contact with the battery cell in the related technology, resulting in poor contact between the two and causing dry burning, and then leading to thermal runaway safety problems caused by overheating of the battery cell. The orthographic projection of the heating device on the first surface of the flow channel plate is overlapped with the orthographic projection of the flow channel on the first surface of the flow channel plate. Since the main function of the heating device is to convert electrical energy into thermal energy after power is turned on, and then transfer the thermal energy to the flow channel, that is, this arrangement can ensure the area for heat exchange between the heating device and the flow channel, while improving the heat utilization rate, the heat exchange efficiency between the flow channel and the heating device is improved, the temperature uniformity of the flow channel plate is ensured, and then the reliability of the battery cell is ensured.

[0008] In a possible implementation manner, the orthographic projection of the heating device on the first surface of the flow channel plate is located within the outer contour of the orthographic projection of the flow channel on the first surface of the flow channel plate.

[0009] According to the above-mentioned technical means, the orthographic projection of the heating device on the first surface of the flow channel plate is located within the outer contour of the orthographic projection of the flow channel on the first surface of the flow channel plate. It can be understood that setting the above-mentioned projection relationship can improve the heat utilization rate of the heating device, and can limit the heat transfer to the area where the flow channel is located, thereby realizing the effectiveness of heat transfer.

[0010] In a possible implementation, the heating device includes at least one heating wire, and the number of flow channels is multiple, the multiple flow channels form multiple flow channel groups, and each flow channel group overlaps with at least one heating wire.

[0011] According to the above-mentioned technical means, each of the multiple flow channel groups overlaps with at least one heating wire, that is, one or more heating wires can be set in the area where each flow channel group is located. In other words, the number of heating wires can be arranged according to the working environment and working conditions of the battery, thereby ensuring that the heating power requirements of the power battery thermal management system are met.

[0012] In a possible embodiment, each flow channel group includes a main flow channel and multiple branch flow channels, the orthographic projection of the heating wire on the flow channel plate overlaps with the orthographic projections of the multiple branch flow channels on the flow channel plate, and the orthographic projection of the heating wire on the first surface of the flow channel plate is located within the orthographic projections of the multiple branch flow channels on the flow channel plate, or the outer contour of the orthographic projection of the heating wire on the first surface of the flow channel plate coincides with the outer contour of the orthographic projections of the multiple branch flow channels on the first surface of the flow channel plate.

[0013] According to the above technical means, in each flow channel group, the orthographic projection of the heating wire on the first surface of the flow channel plate is located within the orthographic projections of the multiple branch flow channels on the flow channel plate, that is, the heating wire can be arranged only in the area where the multiple branch flow channels are arranged, and the heating wire can be arranged inside the area where the multiple branch flow channels are arranged, so as to avoid wasting resources of the heating wire and save costs; in addition, the outer contour of the orthographic projection of the heating wire on the first surface of the flow channel plate is arranged to overlap with the outer contour of the orthographic projections of the multiple branch flow channels on the first surface of the flow channel plate. Such an arrangement can ensure that the heat exchange between the heating wire and the multiple flow channels is more uniform, so as to avoid the temperature of some of the multiple branch flow channels being higher than that of the other branches, and can achieve the maximum heat exchange.

[0014] In a possible implementation, the flow channel plate includes a spacing area, the spacing area is located between two adjacent flow channel groups, and the orthographic projection of the heating wire on the flow channel plate does not overlap with the spacing area.

[0015] According to the above technical means, there is a spacing area between two adjacent flow channel groups, that is, no flow channel is set in the spacing area, so there is no need to set a heating wire in the spacing area, which can save costs and avoid unnecessary waste of resources.

[0016] In a possible embodiment, each of the multiple heating wires includes two connecting terminals, a plurality of first connecting holes are arranged on the upper plate, and a plurality of second connecting holes are arranged on the flow channel plate, each first connecting hole is arranged corresponding to a second connecting hole, and the first connecting hole and the second connecting hole have no overlap with the multiple flow channels, and the connecting terminal passes through the first connecting hole and the second connecting hole of the cold plate structure, and the connecting terminal is used to connect an external circuit.

[0017] According to the above technical means, during the heating and energizing process of the heating wire, the connection terminal in the heating wire needs to be connected to the external circuit to realize the process conversion of electrical energy into thermal energy. Since the heating wire is integrated in the flow channel plate of the cold plate structure, it is necessary to set a first connection hole on the upper plate of the cold plate structure and set a second connection hole on the flow channel plate so that the connection terminal of the heating wire can pass through the first connection hole and the second connection hole to connect to the external circuit. This arrangement avoids the interference between the wiring harness of the heating wire and the beam system in the battery box frame, and improves the overall strength of the power battery box.

[0018] In a possible implementation, the plurality of heating wires are connected to the flow channel plate via a heat-conducting structural adhesive.

[0019] According to the above technical means, a plurality of heating wires are connected to the flow channel plate by using a heat-conducting structural adhesive, so that heat loss can be reduced and more heat can be transferred to the plurality of flow channels on the flow channel plate.

[0020] In a possible implementation manner, the arrangement density of the plurality of heating wires corresponding to the peripheral area of ​​the flow channel plate is greater than the arrangement density of the plurality of heating wires corresponding to the central area of ​​the flow channel plate.

[0021] According to the above technical means, the arrangement of the above heating wires is based on the self-heating of the internal resistance of the battery cell and the surrounding environment in a low temperature environment, so that the temperature uniformity of the power battery is higher.

[0022] In a second aspect, the present application provides a power battery thermal management system, comprising a cold plate structure with an integrated heating device as in any embodiment of the first aspect.

[0023] It should be noted that the technical effects brought about by the second aspect can refer to the technical effects brought about by the corresponding implementation method in the first aspect, and will not be repeated here.

[0024] In a possible embodiment, the power battery thermal management system also includes a frame, multiple battery cell groups and a thermally conductive structural adhesive. The cold plate structure is connected to the bottom of the frame, and the upper plate of the cold plate structure is close to the frame relative to the flow channel plate of the cold plate structure; two adjacent battery cell groups are spaced apart, and each battery cell group includes multiple battery cells; wherein, the multiple battery cell groups are arranged in the frame, and the multiple battery cell groups are arranged on the side of the upper plate of the cold plate structure away from the flow channel plate of the cold plate structure; the thermally conductive structural adhesive is arranged between the multiple battery cell groups and the cold plate structure, for connecting the multiple battery cell groups to the cold plate structure.

[0025] According to the above technical means, the battery cell group is connected to the cold plate structure, and multiple battery cell groups are arranged on the upper plate of the cold plate structure away from the side of the flow channel plate of the cold plate structure; from the above, it can be seen that the heating wire is located on the second surface of the flow channel plate, and the second surface is away from the upper plate relative to the first surface of the flow channel plate, that is, the heating wire will not directly contact the battery cell, which can solve the problem of dry burning caused by foreign matter on the surface of the heating wire and ultimately lead to thermal runaway of the power battery.

[0026] In a possible implementation, the power battery thermal management system further includes a bottom plate, which is located on a side of the cold plate structure away from the plurality of battery cell groups, and is connected to the cold plate structure.

[0027] According to the above technical means, the bottom plate is mainly used to protect the cold plate structure, prevent foreign matter from entering the cold plate structure, and has the function of isolating the outside world. On the other hand, the bottom plate is connected to the cold plate structure. For example, a detachable connection is adopted between the bottom plate and the cold plate structure, so that the bottom plate can be disassembled during use for easy maintenance.

[0028] In a possible implementation, the power battery thermal management system further includes a circuit structure, which is disposed on a side of the cold plate structure close to the battery cell group, and is electrically connected to a connection terminal of the heating wire.

[0029] According to the above technical means, the circuit structure is electrically connected to the connection terminal of the heating wire, and the circuit structure can realize the on and off of the heating wire, thereby ensuring the normal operation of the heating wire.

[0030] In a third aspect, the present application provides a vehicle, comprising a power battery thermal management system according to any embodiment of the second aspect.

[0031] It should be noted that the technical effects brought about by the third aspect can be referred to the technical effects brought about by the corresponding implementation method in the second aspect, and will not be repeated here.

[0032] The above technical features of the present invention have the following beneficial effects:

[0033] (1) The heating device is integrated on the second surface of the flow channel plate of the cold plate structure. This arrangement can improve the space utilization of the power battery thermal management system, and will not occupy the adhesive area between the battery cell and the cold plate structure, and also reduce the risk of the battery cell falling off. At the same time, it solves the problem of foreign matter generated on the surface of the direct contact between the heating component and the battery cell in the related art, resulting in poor contact between the two and causing dry burning, which in turn leads to thermal runaway safety problems caused by overheating of the battery cell.

[0034] (2) The orthographic projection of the heating device on the first surface of the flow channel plate overlaps with the orthographic projection of the flow channel on the first surface of the flow channel plate. Since the main function of the heating device is to convert electrical energy into thermal energy after being energized, and then transfer the thermal energy to the flow channel, that is, such a setting can ensure the area for heat exchange between the heating device and the flow channel, while improving the heat utilization rate, the heat exchange efficiency between the flow channel and the heating device is improved, the temperature uniformity of the flow channel plate is ensured, and then the reliability of the battery cell is ensured.

[0035] (3) A first connection hole is provided on the upper plate of the cold plate structure, and a second connection hole is provided on the flow channel plate, so that the connection terminal of the heating wire can pass through the first connection hole and the second connection hole to connect to the external circuit. This arrangement avoids interference between the wiring harness of the heating wire and the beam system in the box frame of the power battery, and does not require the power battery frame to be opened, thereby improving the overall structural strength of the power battery box.

[0036] (4) The battery cell is directly bonded to the upper plate of the cold plate structure by using a thermally conductive structural adhesive, which can ensure the effective bonding area between the battery cell and the upper plate of the cold plate structure. The bonding rate between the battery cell and the upper plate of the cold plate structure is increased to 100%, thereby maximizing the bonding strength between the battery cell and the cold plate structure, thereby improving the heat exchange efficiency between the battery cell and the cold plate structure.

[0037] (5) The bottom plate and the cold plate structure are detachably connected, for example, the bottom plate and the cold plate structure are bolted together, so that the bottom plate and the cold plate structure are detachable during use to facilitate maintenance of the heating wire.

[0038] It should be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 is a structural diagram of a cold plate structure according to some embodiments;

[0040] Figure 2 is a structural diagram showing the projection relationship between a flow channel plate and a heating wire in a cold plate structure according to some embodiments;

[0041] Figure 3 is a structural diagram of a power battery thermal management system according to some embodiments;

[0042] Figure 4 is a structural diagram of a frame, a cold plate structure, and a bottom plate according to some embodiments.

[0043] In the figure, 1, upper plate; 101, first connecting hole; 2, flow channel plate; 21, first surface; 22, second surface; 23, spacer area; 231, fixing hole; 210, flow channel group; 201, second connecting hole; 211, flow channel; 2111, main flow channel; 2112, branch flow channel; 3, heating device; 31, connecting terminal; 32, heating wire; 4, thermal conductive structural adhesive; 10, cold plate structure; 20, frame; 30, battery cell group; 301, battery cell; 40, bottom plate; 50, circuit structure; 100, power battery thermal management system; 1000, vehicle. DETAILED DESCRIPTION

[0044] In order to enable ordinary persons in the art to better understand the technical solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings.

[0045] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. On the contrary, they are merely examples of devices and methods consistent with some aspects of the present application as detailed in the attached claims.

[0046] New energy vehicles are an inevitable choice for the development of a low-carbon economy and a development trend of the automobile industry. In recent years, China's new energy vehicles have developed rapidly and have become a highlight area of ​​technological innovation and industrial upgrading. As the "heart" of new energy vehicles, power batteries have become their core competitiveness. Optimization of battery thermal management structure is a key link. Excellent thermal management methods can improve the battery operating environment, extend battery life, and even avoid the occurrence of thermal runaway.

[0047] At present, the cooling and heating methods in the field of power battery thermal management mainly include liquid cooling and liquid heating, liquid cooling and electric heating, direct cooling and direct heating, direct cooling and electric heating, etc. Among them, based on the limitation of the layout space of the whole vehicle and the consideration of factors such as cost, it is necessary to have a thermal management solution with both cold plates and heating components. In the existing technology, the cold plate is generally placed at the bottom of the battery cell, and the heating component is arranged on the side or bottom of the battery. For example, in patent CN216980685.U, the heating film is pasted and arranged on the side of the battery cell. However, this arrangement will not only reduce the space utilization of the whole vehicle, but also cause foreign matter and bubbles to appear on the surface of the heating film, resulting in poor contact and dry burning. The adhesive between the heating film and the battery cell is prone to aging and failure, and at the same time increases the risk of the heating film falling off, affecting the working efficiency of the battery cell and poor temperature uniformity. For another example, in patent CN116666835.A, the intermediate heat exchange plate is connected with the direct cooling plate to form a closed cavity suitable for the flow of refrigerant. This arrangement is not conducive to the subsequent maintenance and replacement of the intermediate heat exchange plate, and the wiring harness end of the intermediate heat exchange plate needs to pass through the beam system inside the battery box, weakening the overall structural strength. According to simulation calculations, in order to ensure the reliability of the battery box structure, it is necessary to ensure that the battery cell and the cold plate have a bonding rate of no less than 40%, so it is impossible to arrange the heating film at the bottom of all the batteries. When the area of ​​the heating film is limited under the same power, its heating performance will be seriously affected, resulting in failure to meet the thermal management requirements of the power battery.

[0048] Based on this, the present application provides a cold plate structure 10 with an integrated heating device 3, such as Figure 1 As shown, the cold plate structure 10 with integrated heating device 3 includes a flow channel plate 2, a heating device 3 and an upper plate 1, wherein a flow channel 211 is provided on a first surface 21 of the flow channel plate 2; the heating device 3 is provided on a second surface 22 of the flow channel plate 2; the upper plate 1 is provided on a side of the flow channel plate 2 away from the heating device 3, and Figure 2 , the orthographic projection of the heating device 3 on the first surface 21 of the flow channel plate 2 overlaps with the orthographic projection of the flow channel 211 on the first surface 21 of the flow channel plate 2 .

[0049] It should be noted that, refer to Figure 1 , Figure 1 The heating device 3 shown in the figure is arranged on the second surface 22 of the flow channel plate 2, that is, the heating device 3 is integrated on the second surface 22 of the flow channel plate 2 of the cold plate structure 10. Compared with the related art, this arrangement can improve the space utilization rate of the power battery thermal management system 100. Figure 3 The setting of the heating device 3 does not affect the bonding area between the battery cell 301 and the cold plate structure 10, and can ensure that the bonding rate between the battery cell 301 and the cold plate structure 10 is within the structural reliability range of the power battery thermal management system 100. At the same time, the heating performance of the power battery thermal management system 100 can meet the thermal management requirements of the power battery thermal management system 100.

[0050] It is understandable that the position setting of the above-mentioned heating device 3 does not affect the bonding area between the battery cell 301 and the cold plate structure 10, that is, the bonding of the heating device 3 does not need to occupy the bonding area between the battery cell 301 and the cold plate. In other words, during the driving of the vehicle, especially under the condition of whole vehicle vibration, since the bonding area between the battery cell 301 and the cold plate structure 10 is sufficient, the risk of the battery cell 301 falling off can be reduced. In addition, the setting of the heating device 3 also solves the problem in the related art that foreign matter is generated on the surface of the heating film in direct contact with the battery cell 301, resulting in poor contact between the heating film and the battery cell 301, causing dry burning, and then leading to thermal runaway safety problems caused by overheating of the battery cell 301. Figure 2 Since the main function of the heating device 3 is to convert electrical energy into thermal energy after being powered on, and then transfer the thermal energy to the flow channel 211, the above-mentioned orthographic projection of the heating device 3 on the first surface 21 of the flow channel plate 2 overlaps with the orthographic projection of the flow channel 211 on the first surface 21 of the flow channel plate 2, that is, the overlapping position of the heating device 3 and the flow channel 211 can realize rapid heat exchange between the two, while improving the heat utilization rate, the heat exchange efficiency between the flow channel and the heating device is improved, the temperature uniformity of the flow channel plate is ensured, and then the reliability of the battery cell is ensured.

[0051] In some embodiments, Figure 2 As shown, the orthographic projection of the heating device 3 on the first surface 21 of the flow channel plate 2 is located within the outer contour of the orthographic projection of the flow channel 211 on the first surface 21 of the flow channel plate 2 .

[0052] It should be noted that, refer to Figure 2 Since the main function of the heating device 3 is to convert electrical energy into thermal energy after being powered on, and then transfer the thermal energy to the flow channel 211, the above-mentioned setting of the heating device 3 on the first surface 21 of the flow channel plate 2 is located within the outer contour of the orthographic projection of the flow channel 211 on the first surface 21 of the flow channel plate 2, that is, the overlapping position of the heating device 3 and the flow channel 211 can realize rapid heat exchange between the two. In addition, the overlapping area of ​​the heating device 3 and the flow channel 211 can reflect the degree of heat exchange between the heating device 3 and the flow channel 211. Furthermore, in the actual arrangement of the heating device 3, the overlapping area of ​​the heating device 3 and the flow channel 211 can be arranged according to actual needs to meet the heat exchange requirements of the power battery thermal management system.

[0053] It can be understood that the orthographic projection of the heating device 3 on the first surface 21 of the flow channel plate 2 is located within the outer contour of the orthographic projection of the flow channel 211 on the first surface 21 of the flow channel plate 2. It can be understood that setting the above-mentioned projection relationship can improve the heat utilization rate of the heating device 3, and can limit the heat transfer to the area where the flow channel 211 is located, thereby realizing the effectiveness of heat transfer.

[0054] In some embodiments, continue to refer to Figure 2 The heating device 3 includes at least one heating wire 32 , and the number of flow channels 211 is multiple. The multiple flow channels 211 form multiple flow channel groups 210 , and each flow channel group 210 overlaps with at least one heating wire 32 .

[0055] Exemplarily, the above-mentioned heating device may also be a heating film, a heating plate or other heating components, which is only an example and is not specifically limited.

[0056] For example, refer to Figure 2 , Figure 2 The flow channel group 210 shown in FIG. 1 is an example, wherein: Figure 2 The flow channel group 210 shown in the figure includes two groups, and each flow channel group 210 overlaps with a heating wire 32. It should be noted that each flow channel group 210 in the multiple flow channel groups 210 overlaps with at least one heating wire 32, that is, one or more heating wires 32 can be set in the area where each flow channel group 210 is located, that is, the number of heating wires 32 can be arranged according to the working environment and working conditions of the battery, thereby ensuring that the heating power requirements of the power battery thermal management system are met, which is not specifically limited here.

[0057] In some embodiments, continue to refer to Figure 2 Each flow channel group 210 includes a main flow channel 2111 and multiple branch flow channels 2112, the orthographic projection of the heating wire 32 on the flow channel plate 2 overlaps with the orthographic projection of the multiple branch flow channels 2112 on the flow channel plate 2, and the orthographic projection of the heating wire 32 on the first surface 21 of the flow channel plate 2 is located within the orthographic projection of the multiple branch flow channels 2112 on the flow channel plate 2, or, the outer contour of the orthographic projection of the heating wire 32 on the first surface 21 of the flow channel plate 2 coincides with the outer contour of the orthographic projection of the multiple branch flow channels 2112 on the first surface 21 of the flow channel plate 2.

[0058] For example, refer to Figure 2 In each flow channel group 210, the orthographic projection of the heating wire 32 on the first surface 21 of the flow channel plate 2 is located within the orthographic projection of the multiple branch channels 2112 on the flow channel plate 2, that is, the heating wire 32 can be only arranged in the area where the multiple branch channels 2112 are arranged, and the heating wire 32 can be arranged inside the area where the multiple branch channels 2112 are arranged, so as to avoid waste of heating wire 32 resources and save costs.

[0059] Exemplarily, the outer contour of the orthographic projection of the heating wire 32 on the first surface 21 of the flow channel plate 2 is arranged to overlap with the outer contour of the orthographic projection of the plurality of branch flow channels 2112 on the first surface 21 of the flow channel plate 2, so as to ensure that the heat exchange between the heating wire 32 and the plurality of flow channels 211 is more uniform, so as to avoid the temperature of some of the plurality of branch flow channels 2112 being higher than that of the other branch flow channels 2112, and to achieve the maximum heat exchange.

[0060] In some embodiments, continue to refer to Figure 2 The flow channel plate 2 includes a spacer area 23 , and the spacer area 23 is located between two adjacent flow channel groups 210 . The orthographic projection of the heating wire 32 on the flow channel plate 2 does not overlap with the spacer area 23 .

[0061] It should be noted that there is a spacing area 23 between two adjacent flow channel groups 210, that is, the flow channel 211 is not arranged in the spacing area 23, so there is no need to arrange the heating wire 32 in the spacing area 23, which can save costs and avoid unnecessary waste of resources.

[0062] For example, refer to Figure 2 The spacer 23 is provided with a plurality of fixing holes 231 connected to the reinforcing beams of the frame, and the orthographic projection of the heating wire 32 on the flow channel plate 2 does not overlap with the spacer 23. Figure 3 , which can avoid the interference of the position setting of the heating wire 32 during the connection process between the cold plate structure 10 and the reinforcement beam of the frame.

[0063] In some embodiments, reference Figure 1 Each of the multiple heating wires 32 includes two connecting terminals 31, a plurality of first connecting holes 101 are arranged on the upper plate 1, and a plurality of second connecting holes 201 are arranged on the flow channel plate 2, each first connecting hole 101 is arranged corresponding to a second connecting hole 201, and the first connecting hole 101 and the second connecting hole 201 have no overlap with the multiple flow channels 211, and the connecting terminal 31 passes through the first connecting hole 101 and the second connecting hole 201 of the cold plate structure 10, and the connecting terminal 31 is used to connect an external circuit.

[0064] For example, Figure 1 As shown, during the heating and energizing process of the heating wire 32, the connection terminal 31 in the heating wire 32 needs to be connected to the external circuit to realize the process conversion of electrical energy into thermal energy. Since the heating wire 32 is integrated with the second surface 22 of the flow channel plate 2 of the cold plate structure 10, it is necessary to set a first connection hole 101 on the upper plate 1 of the cold plate structure 10 and set a second connection hole 201 on the flow channel plate 2, so that the connection terminal 31 of the heating wire 32 passes through the first connection hole 101 and the second connection hole 201 to connect to the external circuit. This arrangement avoids the interference between the wiring harness of the heating wire 32 and the beam system in the battery box frame, and improves the overall strength of the power battery box.

[0065] In some embodiments, reference Figure 1 , a plurality of heating wires 32 are connected to the flow channel plate 2 via a heat-conducting structural adhesive.

[0066] For example, Figure 1As shown, the use of heat-conducting structural adhesive 4 to connect the multiple heating wires 32 and the flow channel plate 2 can reduce heat loss and allow more heat to be transferred to the multiple flow channels 211 on the flow channel plate 2.

[0067] In some embodiments, reference Figure 1 The arrangement density of the plurality of heating wires 32 corresponding to the peripheral area of ​​the flow channel plate 2 is greater than the arrangement density of the plurality of heating wires 32 corresponding to the central area of ​​the flow channel plate 2 .

[0068] It should be noted that the density of the above-mentioned heating wires 32 can be the number of heating wires 32 arranged in a unit area, and the arrangement of the heating wires 32 is based on the self-heating of the internal resistance of the battery cell 301 and the surrounding environment in a low-temperature environment. Specifically, the portion of the peripheral area of ​​the flow channel plate 2 corresponding to the multiple heating wires 32 loses heat faster under the influence of the surrounding environment, while the central area of ​​the flow channel plate 2 corresponding to the heating wires 32 does not need to be heated when it can meet the working conditions due to the self-heating of the internal resistance of the battery cell 301. Therefore, the number of heating wires 32 arranged in the peripheral area of ​​the flow channel plate 2 is greater than that in the central area of ​​the flow channel plate 2, that is, the arrangement is more dense. The arrangement of the above-mentioned heating wires 32 can improve the temperature uniformity of the power battery and avoid excessive temperature in local areas.

[0069] Reference Figure 3 The present application also provides a power battery thermal management system 100, combined with Figure 1 , comprising a cold plate structure 10 with an integrated heating device 3 provided in any of the above embodiments.

[0070] It should be noted that, since the power battery thermal management system 100 in the embodiment of the present application includes a cold plate structure 10 with an integrated heating wire 32 , the technical effects that can be obtained can also refer to the above embodiment, and the embodiment of the present application will not be repeated here.

[0071] In some embodiments, reference Figure 3 The power battery thermal management system 100 also includes a frame 20, a plurality of battery cell groups 30 and a thermally conductive structural adhesive 4. The cold plate structure 10 is connected to the bottom of the frame 20, and the upper plate 1 of the cold plate structure 10 is close to the frame 20 relative to the flow channel plate 2 of the cold plate structure 10; two adjacent battery cell groups 30 are arranged at intervals, and each battery cell group 30 includes a plurality of battery cells 301; wherein, the plurality of battery cell groups 30 are arranged in the frame 20, and the plurality of battery cell groups 30 are arranged on the side of the upper plate 1 of the cold plate structure 10 away from the flow channel plate 2 of the cold plate structure 10; the thermally conductive structural adhesive 4 is arranged between the plurality of battery cell groups 30 and the cold plate structure 10, and is used to connect the plurality of battery cell groups 30 and the cold plate structure 10.

[0072] For example, refer to Figure 3The battery cell group 30 is connected to the cold plate structure 10 through the heat conductive structural adhesive 4, and multiple battery cell groups 30 are arranged on the upper plate 1 of the cold plate structure 10 away from the side of the flow channel plate 2 of the cold plate structure 10; As can be seen from the above content, combined with Figure 1 The heating wire 32 is located on the second surface 22 of the flow channel plate 2, and the second surface 22 is far away from the upper plate 1 relative to the first surface 21 of the flow channel plate 2. That is to say, the heating wire 32 will not directly contact the battery cell 301, which can avoid foreign matter or bubbles on the surface of the heating wire 32 causing dry burning, resulting in overheating of the battery cell 301, and ultimately causing the safety problem of thermal runaway of the power battery.

[0073] In some embodiments, reference Figure 4 Combined with Figure 3 The power battery thermal management system 100 further includes a bottom plate 40 , which is located on a side of the cold plate structure 10 away from the plurality of battery cell groups 30 , and is connected to the cold plate structure 10 .

[0074] Exemplarily, the bottom plate 40 is mainly used to protect the cold plate structure 10, prevent foreign matter or bubbles from entering the cold plate structure 10, and has the function of isolating the outside world. On the other hand, the bottom plate 40 is connected to the cold plate structure 10. For example, the bottom plate 40 and the cold plate structure 10 are detachably connected. Specifically, the bottom plate 40 and the cold plate structure 10 are bolted. In this way, the bottom plate 40 is detachable during use to facilitate the inspection and maintenance of the heating wire 32.

[0075] In some embodiments, reference Figure 4 Combination Figure 3 The power battery thermal management system 100 further includes a circuit structure 50 , which is disposed on a side of the cold plate structure 10 close to the battery cell group 30 , and the circuit structure 50 is electrically connected to the connection terminal 31 of the heating wire 32 .

[0076] For example, refer to Figure 4 Combined with Figure 3 The circuit structure 50 is electrically connected to the connection terminal 31 of the heating wire 32 , and the circuit structure 50 can realize the on and off of the heating wire 32 , thereby ensuring the normal operation of the heating wire 32 .

[0077] Exemplarily, the working process of the heating wire 32 is as follows: in a low-temperature environment, when the power battery needs to be heated, the heating wire 32 connects to the circuit structure 50 to obtain the electric energy required for heating, thereby realizing the conversion of electric energy into thermal energy, and through heat exchange, the heat is transferred to the multiple flow channels 211, and the heat is transferred to the upper plate 1 through the flow channels 211, and the battery cell 301 is connected to the upper plate 1 of the cold plate structure 10 through a heat-conducting structural adhesive. Further, the upper plate 1 of the cold plate structure 10 can heat the battery cell 301 to a temperature range within the thermal management required to meet the charging and discharging conditions. In a high-temperature environment, when the power battery needs to be cooled, the current of the heating wire 32 is disconnected, and the heat is taken away by the cooling medium inside the flow channel 211 set on the flow channel plate 2 in the cold plate structure 10 to ensure the cooling performance of the power battery.

[0078] The present application also provides a vehicle 1000, referring to Figure 3 , including the power battery thermal management system 100 provided in any of the above embodiments.

[0079] It should be noted that, since the vehicle 1000 in the embodiment of the present application includes a power battery thermal management system 100, the technical effects that can be obtained can also refer to the above embodiment, and the embodiment of the present application will not be repeated here.

[0080] The above are only specific implementations of the present application, but the protection scope of the present application is not limited thereto, and any changes or substitutions within the technical scope disclosed in the present application should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A cold plate structure (10) with an integrated heating device (3), characterized in that: include: A flow channel plate (2), wherein a first surface (21) of the flow channel plate (2) is provided with a flow channel (211); A heating device (3), the heating device (3) being arranged on the second surface (22) of the flow channel plate (2); An upper plate (1), the upper plate (1) being arranged on a side of the flow channel plate (2) away from the heating device (3); The orthographic projection of the heating device (3) on the first surface (21) of the flow channel plate (2) overlaps with the orthographic projection of the flow channel (211) on the first surface (21) of the flow channel plate (2).

2. The cold plate structure (10) of the integrated heating device (3) according to claim 1, characterized in that: The orthographic projection of the heating device (3) on the first surface (21) of the flow channel plate (2) is located within the outer contour of the orthographic projection of the flow channel (211) on the first surface (21) of the flow channel plate (2).

3. The cold plate structure (10) of the integrated heating device (3) according to claim 2, characterized in that: The heating device (3) comprises at least one heating wire (32), the flow channels (211) are multiple in number, the multiple flow channels (211) form multiple flow channel groups (210), and each of the flow channel groups (210) overlaps with at least one of the heating wires (32).

4. The cold plate structure (10) of the integrated heating device (3) according to claim 3, characterized in that: Each of the flow channel groups (210) comprises a main flow channel (211) and a plurality of branch flow channels (211); an orthographic projection of the heating wire (32) on the flow channel plate (2) overlaps with an orthographic projection of the plurality of branch flow channels (211) on the flow channel plate (2); and an orthographic projection of the heating wire (32) on the first surface (21) of the flow channel plate (2) is located within an orthographic projection of the plurality of branch flow channels (211) on the flow channel plate (2); or an outer contour of an orthographic projection of the heating wire (32) on the first surface (21) of the flow channel plate (2) overlaps with an outer contour of an orthographic projection of the plurality of branch flow channels (211) on the first surface (21) of the flow channel plate (2).

5. The cold plate structure (10) of the integrated heating device (3) according to claim 3 or 4, characterized in that: The flow channel plate (2) comprises a spacing area (23), the spacing area (23) is located between two adjacent flow channel groups (210), and the orthographic projection of the heating wire (32) on the flow channel plate (2) does not overlap with the spacing area (23).

6. The cold plate structure (10) of the integrated heating device (3) according to any one of claims 3 to 5, characterized in that: The heating wire (32) comprises two connection terminals (31); a plurality of first connection holes (101) are arranged on the upper plate (1); a plurality of second connection holes (201) are arranged on the flow channel plate (2); each of the first connection holes (101) is arranged corresponding to a position of the second connection hole (201); the first connection hole (101) and the second connection hole (201) do not overlap with the plurality of flow channels (211); the connection terminal (31) passes through the first connection hole (101) and the second connection hole (201) of the cold plate structure (10); and the connection terminal (31) is used to connect an external circuit.

7. The cold plate structure (10) of the integrated heating device (3) according to claim 3, characterized in that: The plurality of heating wires (32) are connected to the flow channel plate (2) via a heat-conducting structural adhesive (4).

8. The cold plate structure (10) of the integrated heating device (3) according to claim 3, characterized in that: The arrangement density of the plurality of heating wires (32) corresponding to the peripheral area of ​​the flow channel plate (2) is greater than the arrangement density of the plurality of heating wires (32) corresponding to the central area of ​​the flow channel plate (2).

9. A power battery thermal management system (100), characterized in that: A cold plate structure (10) comprising an integrated heating device (3) as claimed in any one of claims 1 to 8.

10. The power battery thermal management system (100) according to claim 9, characterized in that: Also includes: A frame (20), the cold plate structure (10) being connected to the bottom of the frame (20), and the upper plate (1) of the cold plate structure (10) being closer to the frame (20) relative to the flow channel plate (2) of the cold plate structure (10); A plurality of battery cell groups (30), wherein two adjacent battery cell groups (30) are arranged at intervals, and each battery cell group (30) comprises a plurality of battery cells (301); wherein the plurality of battery cell groups (30) are arranged in the frame (20), and the plurality of battery cell groups (30) are arranged on a side of an upper plate (1) of the cold plate structure (10) away from a flow channel plate (2) of the cold plate structure (10); A heat-conducting structural adhesive (4), the heat-conducting structural adhesive (4) being arranged between the plurality of battery cell groups (30) and the cold plate structure (10) and being used for connecting the plurality of battery cell groups (30) and the cold plate structure (10).

11. The power battery thermal management system (100) according to claim 10, characterized in that: Also includes: A bottom plate (40), the bottom plate (40) being located on a side of the cold plate structure (10) away from the plurality of battery cell groups (30), and the bottom plate (40) being connected to the cold plate structure (10).

12. The power battery thermal management system (100) according to claim 10, characterized in that: Also includes: A circuit structure (50), the circuit structure (50) being arranged on a side of the cold plate structure (10) close to the battery cell group (30), the circuit structure (50) being electrically connected to a connection terminal (31) of the heating wire (32).

13. A vehicle (1000), characterized in that: It comprises a power battery thermal management system (100) as claimed in any one of claims 9 to 12.

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