Cooling structure and battery pack

Abstract

This utility model relates to the field of power battery technology and provides a cooling structure and battery pack. The cooling structure of this utility model includes a structural body and a first flow channel inside it. The first flow channel is located in the first part that abuts against the BDU assembly, and a liquid storage chamber is formed within the structural body. The liquid storage chamber communicates with the first flow channel, forming a flow loop for the circulation of coolant. A flow regulating device is provided between the first flow channel and the inlet or outlet of the structural body. This utility model's cooling mechanism, by storing a certain amount of coolant in the liquid storage chamber, allows the coolant in the storage chamber to flow into the first flow channel when the flow regulating device disconnects the first flow channel from the liquid cooling system, thereby achieving independent cooling of the BDU assembly and ensuring its normal operation.

Description

Technical Field

[0001] This utility model relates to the field of power battery technology, and in particular to a cooling structure and battery pack. Background Technology

[0002] As the charging and discharging capabilities of battery packs improve, the heat generated by the components within the battery pack also increases. In addition to the battery modules generating heat, the BDU (Battery Module Discharge Unit), as the sole current-carrying path within the battery pack, also generates a significant amount of heat during operation. Therefore, both the battery modules and the BDU need to be cooled simultaneously within the battery pack.

[0003] In existing technologies, liquid cooling plates are typically used to cool both the battery module and the BDU (Battery Module Unit). However, in cold environments where the battery module needs to be heated, the high-temperature coolant used to heat the battery module will also heat the BDU, causing it to overheat. This can affect the lifespan of the BDU and increase its failure risk. Utility Model Content

[0004] In view of this, the present invention aims to provide a cooling structure to achieve independent cooling of BDU components.

[0005] To achieve the above objectives, the technical solution of this utility model is implemented as follows:

[0006] A cooling structure includes a structural body, a first flow channel integrated within the structural body, and an inlet and an outlet disposed on the structural body and connected to the first flow channel.

[0007] The structural body has a first portion for contacting the BDU component, and the first flow channel is located in the first portion;

[0008] A liquid storage cavity is formed within the structure body, and the liquid storage cavity is connected to the first flow channel, so that the liquid storage cavity and the first flow channel form a flow loop for the circulation of coolant.

[0009] A flow regulating device is provided between the first flow channel and the inlet and / or the outlet.

[0010] Furthermore, the first flow channel includes a main flow channel and a branch flow channel connecting the main flow channel; the branch flow channel includes an inlet flow channel and an outlet flow channel connecting the liquid storage chamber, and the flow cross-sectional area of ​​the inlet flow channel is larger than the flow cross-sectional area of ​​the outlet flow channel.

[0011] Furthermore, the liquid storage chambers are configured as two, and are respectively located at both ends of the main channel along a preset direction; the liquid inlet channel and the liquid outlet channel are both configured as two, and each liquid storage chamber is connected to a corresponding liquid inlet channel and a corresponding liquid outlet channel; in a direction perpendicular to the preset direction, the liquid inlet channel connected to one liquid storage chamber and the liquid outlet channel connected to the other liquid storage chamber are located on the same side of the main channel.

[0012] Furthermore, the main channel is divided into multiple sub-channels arranged side by side, and all of the multiple sub-channels extend along the preset direction.

[0013] Furthermore, the structure body is provided with heat storage material; the heat storage material is attached to the side of the first part opposite to the BDU assembly, and / or, the heat storage material is filled in the liquid storage cavity.

[0014] Furthermore, the structural body also has a second part for abutting the battery module, and the second part is provided with a second flow channel connecting the liquid inlet and the liquid outlet.

[0015] Furthermore, the flow regulating device includes a valve and a temperature acquisition unit; the temperature acquisition unit can acquire the temperature of the coolant in the second flow channel and generate a temperature signal; the external control unit can receive the temperature signal and adjust the opening of the valve.

[0016] Furthermore, a first cross-connector is provided on one side of the structural body, the first cross-connector connecting the first flow channel and the liquid inlet, and the flow regulating device is provided on the first cross-connector; and / or, a second cross-connector is provided on one side of the structural body, the second cross-connector connecting the first flow channel and the liquid outlet, and the flow regulating device is provided on the second cross-connector.

[0017] Furthermore, the first flow channel is connected in parallel to the second flow channel, and the second flow channel branches to form a first connecting flow channel and a second connecting flow channel extending towards the first flow channel; the first connecting flow channel is connected to the first flow channel, and the second connecting flow channel is connected to the first flow channel through the first cross-connector.

[0018] Compared with the prior art, this utility model has the following advantages:

[0019] (1) The cooling structure described in this utility model stores a certain amount of coolant in a storage chamber. When the flow regulating device cuts off the connection between the first flow channel and the liquid cooling system, the coolant in the storage chamber can flow into the first flow channel, thereby achieving independent cooling of the BDU component and ensuring the normal operation of the BDU component.

[0020] (2) The main flow of the first flow channel is connected to the liquid storage chamber through the liquid inlet flow channel and the liquid outlet flow channel. The flow cross-sectional area of ​​the liquid inlet flow channel is larger than that of the liquid outlet flow channel, so as to facilitate the circulation of coolant in the flow circuit.

[0021] (3) Two reservoirs are configured, which increases the storage capacity of coolant. At the same time, the inlet and outlet channels of the two reservoirs are located on the same side, which allows the coolant to circulate between the two reservoirs and improves the smoothness of coolant flow.

[0022] (4) The main flow channel includes multiple sub-flow channels extending along a preset direction, covering a large area and further improving the smoothness of coolant flow.

[0023] (5) The structure is equipped with heat storage material, which can store a certain amount of cold energy when the liquid cooling system is cooling, thereby improving the cooling effect on the BDU components.

[0024] (6) The structure body also has a second flow channel for cooling the battery module, realizing zoned cooling of the battery module and BDU components.

[0025] (7) The flow regulation device includes a valve and a temperature acquisition unit, which can independently cool the BDU component according to the temperature of the coolant in the second flow channel, and realize the automatic switching of the coolant flow direction.

[0026] (8) The first flow channel can be connected to the inlet through the first cross-connector, and the first flow channel can be connected to the outlet through the second cross-connector. The cross-connector is located on the outside of the structure body and has sufficient operating space. The flow regulating device is installed on the cross-connector to facilitate the installation and maintenance of the flow regulating device.

[0027] (9) The flow control device is located between the first flow channels of the second connecting flow channel to prevent the high-temperature coolant in the second flow channel from affecting the normal cooling of the BDU component by the first flow channel.

[0028] This utility model also proposes a battery pack, which includes a housing, a BDU assembly disposed in the housing, and a cooling structure as described above.

[0029] The battery pack and / or the battery module described in this utility model have the same technical effects as the prior art, and will not be described in detail here. Attached Figure Description

[0030] The accompanying drawings, which form part of this utility model, are used to provide a further understanding of the utility model. The illustrative embodiments of the utility model and their descriptions are used to explain the utility model and do not constitute an undue limitation of the utility model. In the drawings:

[0031] Figure 1This is a schematic diagram of the overall structure of the cooling structure described in an embodiment of the present invention;

[0032] Figure 2 for Figure 1 An enlarged view of the location shown in Figure A;

[0033] Figure 3 This is a front view of the cooling structure on the side away from the BDU assembly according to an embodiment of the present invention;

[0034] Figure 4 This is a front view of the cooling structure of this utility model embodiment facing the BDU assembly.

[0035] Figure 5 This is a schematic diagram of the first and second flow channels according to an embodiment of the present utility model;

[0036] Figure 6 This is a schematic diagram of the structure of the first flow channel connecting to a liquid storage chamber according to an embodiment of the present invention;

[0037] Figure 7 This is a schematic diagram of the structure of the first flow channel connecting the two liquid storage chambers according to an embodiment of the present invention;

[0038] Explanation of reference numerals in the attached figures:

[0039] 1. Structural body; 1a. First part; 1b. Second part;

[0040] 2. First flow channel; 201. Sub-flow channel; 202. Inlet flow channel; 203. Outlet flow channel;

[0041] 3. Liquid storage chamber;

[0042] 4. Liquid inlet;

[0043] 5. Liquid outlet;

[0044] 6. Second flow channel; 601. First connecting flow channel; 602. Second connecting flow channel;

[0045] 7. Valves;

[0046] 8. First takeover;

[0047] 9. Border;

[0048] 10. Base plate. Detailed Implementation

[0049] To make the technical solution and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0050] It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0051] Furthermore, in the description of this utility model, it should be noted that if terms such as "upper," "lower," "inner," or "outer" appear, indicating orientation or positional relationship, they are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. In addition, if terms such as "first" or "second" appear, they are also used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0052] Furthermore, in the description of this utility model, unless otherwise explicitly defined, the terms "installation," "connection," "joining," and "connector" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model in light of the specific circumstances.

[0053] In this utility model, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of this utility model. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0054] The present invention will now be described in detail through exemplary embodiments. However, it should be understood that, without further description, elements, structures, and features in one embodiment may be advantageously incorporated into other embodiments.

[0055] An embodiment of the first aspect of this utility model provides a cooling structure for cooling BDU components in a battery pack.

[0056] In existing technologies, the same cooling device is typically used to cool both the battery module and the BDU simultaneously. However, when the liquid cooling system needs to heat the battery module, the high-temperature coolant used to heat the battery module also heats the BDU assembly, which can cause the BDU assembly to overheat and affect its normal operation.

[0057] In view of this, in order to overcome the shortcomings of the prior art, the cooling structure of this embodiment combines... Figure 1 , Figure 3 and Figure 4 In terms of overall design, it includes a structural body 1, a first flow channel 2 integrated within the structural body 1, and an inlet 4 and an outlet 5 located on the structural body 1 and connected to the first flow channel 2.

[0058] The structural body 1 has a first portion 1a for contacting the BDU assembly, and a first flow channel 2 is located in the first portion 1a. A liquid storage chamber 3 is formed within the structural body 1, and the liquid storage chamber 3 communicates with the first flow channel 2, thereby forming a flow loop for the circulation of coolant. A flow regulating device is provided between the first flow channel 2 and the inlet 4 and / or outlet 5.

[0059] As configured above, when the liquid cooling system cools the battery module, the storage chamber 3 can store a certain amount of low-temperature coolant. When the liquid cooling system needs to heat the battery module, the flow regulating device can disconnect the first flow channel 2 from the inlet and outlet ports 5, i.e., the coolant circulation pipeline of the liquid cooling system. Simultaneously, due to the continuous heat release from the BDU component, the BDU component heats the coolant in the first flow channel 2. The density of the heated coolant gradually decreases, and the density of the low-temperature coolant in the storage chamber 3 is greater than that of the coolant in the first flow channel 2. This causes the coolant in the storage chamber 3 to flow into the first flow channel 2, while the coolant in the first flow channel 2 flows back into the storage chamber 3.

[0060] Therefore, by storing a certain amount of coolant in the liquid storage chamber 3, when the flow regulating device cuts off the connection between the first flow channel 2 and the liquid cooling system, the coolant in the liquid storage chamber 3 can flow into the first flow channel 2, thereby achieving independent cooling of the BDU component, avoiding excessive temperature of the BDU component from affecting its service life and causing failure, thus ensuring the normal operation of the BDU component.

[0061] Based on the above overview, specifically, in this embodiment, the circulation of coolant in the reservoir 3 and coolant in the first flow channel 2 between the first flow channel 2 and the reservoir 3 is driven by density difference. If the density difference between the coolant in the first flow channel 2 and the reservoir 3 is small, the coolant flow will be impeded. However, heat exchange still exists between the coolant in the first flow channel 2 and the coolant in the reservoir 3, so that the coolant in the reservoir 3 can cool the BDU assembly to a certain extent.

[0062] In this embodiment, the structural body 1 is a plate, and the plate includes two interlocking plate surfaces. One plate surface is flat and is used to abut against the BDU component, while a groove structure is formed on the other plate surface. The groove structure and the flat plate surface together form the first flow channel 2 mentioned above.

[0063] Combination Figures 3 to 6 In some exemplary embodiments of the cooling mechanism shown, the first flow channel 2 includes a main flow channel and branch flow channels connecting to the main flow channel. The branch flow channels include an inlet flow channel 202 and an outlet flow channel 203 connecting to the liquid storage chamber 3, with the flow cross-sectional area of ​​the inlet flow channel 202 being larger than that of the outlet flow channel 203. This arrangement makes the flow resistance in the inlet flow channel 202 less than the flow resistance in the outlet flow channel 203, allowing the lower-temperature, higher-density coolant in the liquid storage chamber 3 to more easily flow into the first flow channel 2 from the larger flow cross-sectional area. Simultaneously, the higher-temperature, lower-density coolant in the first flow channel 2 can more easily flow back into the liquid storage chamber 3 from the outlet flow channel 203. This facilitates the outflow of coolant from the liquid storage chamber 3 and the return flow of coolant from the first flow channel 2 into the liquid storage chamber 3, promoting the circulation of coolant in the flow loop and ensuring the cooling effect of the coolant in the liquid storage chamber 3 on the BDU assembly.

[0064] To further improve the cooling effect on the BDU components and enhance the smoothness of coolant flow in the flow circuit, combined with... Figure 7 As shown, in this embodiment, two liquid storage chambers 3 are configured and are located at both ends of the main flow channel along a preset direction. Two inlet channels 202 and two outlet channels 203 are each configured, and each liquid storage chamber 3 is connected to a corresponding inlet channel 202 and a corresponding outlet channel 203. In a direction perpendicular to the preset direction, the inlet channel 202 connected to one liquid storage chamber 3 and the outlet channel 203 connected to the other liquid storage chamber 3 are located on the same side of the main flow channel.

[0065] By setting up two liquid storage chambers 3, the coolant storage capacity is increased, which to some extent extends the cooling time of the BDU component and improves the cooling effect. Simultaneously, by placing the inlet channel 202 and outlet channel 203 corresponding to the two liquid storage chambers 3 on the same side, the coolant can flow out from the inlet channel 202 of one liquid storage chamber 3 and into the outlet channel 203 of the other liquid storage chamber 3, allowing the coolant to circulate between the two liquid storage chambers 3. Furthermore, both liquid storage chambers 3 can drive the coolant to flow in the flow loop through density differences, thereby improving the smoothness of coolant flow.

[0066] In this embodiment, the main flow channel is divided into multiple sub-flow channels 201 arranged side by side, and all the sub-flow channels 201 extend along a preset direction. The multiple side-by-side sub-flow channels 201 can cover a large area to ensure the cooling effect of the first flow channel 2 on the BDU component. At the same time, the sub-flow channels 201 are arranged along the preset direction, which can further improve the smoothness of coolant flow.

[0067] In one embodiment, the structural body 1 of this example is provided with heat storage material. The heat storage material is attached to the side of the first part 1a facing away from the BDU assembly, or filled in the liquid storage cavity 3. Alternatively, heat storage material is provided in both the first part 1a and the liquid storage cavity 3. It is understood that the heat storage material can undergo a phase change at a certain temperature, accompanied by the absorption or release of heat. In this embodiment, the heat storage material can release heat when the liquid cooling system cools the battery module, and when the liquid cooling system heats the battery module, the heat storage material can absorb heat from the coolant in the first flow channel 2 and the liquid storage cavity 3 to reduce the temperature of the coolant and improve the cooling effect on the BDU assembly.

[0068] It is worth noting that, for this embodiment, based on the above exemplary implementations, in specific implementation, as a preferred embodiment, the heat storage material in this embodiment can be a conventional heat storage material well known to those skilled in the art, such as heat storage wax with an outer shell, heat storage salt, graphite material, etc., which can store a certain amount of cold energy when the liquid cooling system is cooling.

[0069] In the preferred embodiment above, the structural body 1 further has a second part 1b for abutting the battery module, and the second part 1b is provided with a second flow channel 6 connecting the liquid inlet 4 and the liquid outlet 5. The second flow channel 6 enables the cooling structure to cool or heat the battery module, and due to the flow regulation device, the cooling structure of this embodiment achieves zoned cooling of the battery module and the BDU assembly.

[0070] Specifically, the flow regulation device in this embodiment includes a valve 7 and a temperature acquisition unit. The temperature acquisition unit can acquire the temperature of the coolant in the second flow channel 6 and generate a temperature signal. An external control unit can receive the temperature signal and adjust the opening of the valve 7. It is understood that when the liquid cooling system starts heating the battery module, the temperature of the coolant in the second flow channel 6 will rise to a certain value. The control unit can adjust the opening of the valve 7 according to the temperature signal to disconnect the first flow channel 2 from the liquid cooling system. Thus, the flow regulation device can automatically and independently cool the BDU component according to the temperature of the second flow channel 6.

[0071] In this embodiment, valve 7 is an electrically controlled valve. The BMS mainboard of the battery pack can act as a control unit, receiving temperature signals and controlling the operation of valve 7. Furthermore, as an arrangement of a flow regulating device, the main body 1 of this embodiment has a connecting channel that connects the first channel 2 and the second channel 6, and the flow regulating device is located within the connecting channel. Specifically, valve 7 is located within the connecting channel, dividing the connecting channel into two parts. A temperature acquisition unit is located in a portion of the connecting channel near the connecting channel and can acquire the temperature of the coolant in the second channel 6 through the connecting channel.

[0072] To facilitate the installation and maintenance of flow control devices, such as Figure 2 and Figure 4 As shown, in this embodiment, a first cross-connector 8 is provided on one side of the structural body 1. The first cross-connector 8 connects the first flow channel 2 and the liquid inlet 4, and the flow regulating device is provided on the first cross-connector 8. Alternatively, a second cross-connector is provided on one side of the structural body 1. The second cross-connector connects the first flow channel 2 and the liquid outlet 5, and the flow regulating device is provided on the second cross-connector. Since the cross-connector is located on the outside of the structural body 1, there is sufficient operating space around the cross-connector. Placing the flow regulating device on the cross-connector facilitates the installation and maintenance of the flow regulating device. Based on this, in this embodiment, the first flow channel 2 is connected in parallel to the second flow channel 6, and the second flow channel 6 branches to form a first connecting flow channel 601 and a second connecting flow channel 602 extending towards the first flow channel 2. The first connecting flow channel 601 is connected to the first flow channel 2, and the second connecting flow channel 602 is connected to the first flow channel 2 through the first cross-connector 8.

[0073] Connecting the first flow channel 2 in parallel with the second flow channel 6 avoids the direct connection of the jumper to the inlet 4 or outlet 5. The jumper only needs to bridge the two flow channels, thus reducing its length and lowering costs. Simultaneously, the first connecting flow channel 601 is directly connected to the first flow channel 2, while the second connecting flow channel 602 is connected to the first flow channel 2 via the first jumper 8. This utilizes only one jumper and one flow regulating device, further reducing costs.

[0074] Furthermore, it is understandable that when the liquid cooling system is in heating mode, the coolant temperature at the end of the second flow channel 6 near the inlet 4 is higher, meaning the coolant temperature in the second connecting flow channel 602 is higher. The coolant temperature at the end of the second flow channel 6 near the outlet 5 is lower, and the coolant temperature in the first connecting flow channel 601 is lower.

[0075] Therefore, by placing the flow control device between the first flow channel 2 and the second connecting flow channel 602, it is possible to prevent the coolant on the high-temperature side of the second flow channel 6 from causing excessively high coolant levels in the first flow channel 2 through heat transfer. Since the first flow channel 2 is directly connected to the low-temperature side of the second flow channel 6 via the first connecting flow channel 601, this saves costs and prevents the high-temperature coolant in the second flow channel 6 from affecting the normal cooling of the BDU assembly by the first flow channel 2, thus ensuring the cooling effect of the BDU assembly. In specific implementation, the first flow channel 2 and the inlet and outlet ports 5 of this embodiment are respectively located at opposite ends of the second flow channel 6 along a direction perpendicular to a preset direction.

[0076] In a specific implementation, as a preferred arrangement of the flow regulation device, the valve in this embodiment is located in the first cross-connector 8 and can divide the first cross-connector into two parts. The temperature acquisition unit is located in a part of the second connecting channel at one end of the first cross-connector, and can acquire the temperature of the coolant in the second connecting channel through the second connecting channel.

[0077] In summary, the cooling structure of this embodiment adopts the above design. By setting up a liquid storage chamber 3 to store a certain amount of coolant, when the flow regulating device cuts off the connection between the first flow channel 2 and the liquid cooling system, the coolant in the liquid storage chamber 3 can flow into the first flow channel 2, thereby achieving independent cooling of the BDU component and ensuring the normal operation of the BDU component.

[0078] A second aspect of this utility model provides a battery pack, which includes a housing, a BDU assembly disposed within the housing, and a cooling structure as described in Embodiment 1. In a specific implementation, the housing in this embodiment includes a frame 9, and a top plate and a bottom plate 10 that are fastened to the upper and lower ends of the frame 9. In this embodiment, the bottom plate 10 and the frame 9 constitute the lower housing of the battery pack, and the bottom plate 10 is constructed from the aforementioned structural body 1, thereby saving space within the battery pack and improving the space utilization rate of the battery pack.

[0079] In this embodiment, the battery pack, through the aforementioned cooling structure, can achieve independent cooling of the BDU component when the liquid cooling system heats the battery module, thus ensuring the normal operation of the BDU component.

[0080] The above descriptions are merely some embodiments of this utility model and are not intended to limit the utility model. The technical features or structures in the foregoing different embodiments can be arbitrarily combined to form other specific technical solutions as needed. For those skilled in the art, this utility model can have various modifications and variations. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principle of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A cooling structure, characterized in that: It includes a structural body, a first flow channel integrated within the structural body, and an inlet and an outlet disposed on the structural body and connected to the first flow channel. The structural body has a first portion for contacting the BDU component, and the first flow channel is located in the first portion; A liquid storage cavity is formed within the structure body, and the liquid storage cavity is connected to the first flow channel, so that the liquid storage cavity and the first flow channel form a flow loop for the circulation of coolant. A flow regulating device is provided between the first flow channel and the inlet and / or the outlet.

2. The cooling structure according to claim 1, characterized in that: The first flow channel includes a main flow channel and branch flow channels connecting the main flow channel; The branch flow channel includes an inlet flow channel and an outlet flow channel that connect the liquid storage chamber, and the flow cross-sectional area of ​​the inlet flow channel is larger than the flow cross-sectional area of ​​the outlet flow channel.

3. The cooling structure according to claim 2, characterized in that: The liquid storage chamber is configured as two, and is located at both ends of the main channel along a preset direction; The liquid inlet channel and the liquid outlet channel are each configured as two, and each liquid storage chamber is connected to a corresponding liquid inlet channel and a corresponding liquid outlet channel; In a direction perpendicular to the preset direction, the inlet channel connected to one of the liquid storage chambers and the outlet channel connected to the other liquid storage chamber are located on the same side of the main channel.

4. The cooling structure according to claim 3, characterized in that: The main channel is divided into multiple sub-channels arranged side by side, and all of the sub-channels extend along the preset direction.

5. The cooling structure according to claim 1, characterized in that: The structure body is equipped with heat storage material; The heat storage material is attached to the side of the first portion facing away from the BDU assembly, and / or, The heat storage material is filled inside the liquid storage cavity.

6. The cooling structure according to any one of claims 1 to 5, characterized in that: The structure body also has a second part for abutting the battery module, and the second part is provided with a second flow channel connecting the liquid inlet and the liquid outlet.

7. The cooling structure according to claim 6, characterized in that: The flow regulating device includes a valve and a temperature acquisition unit; The temperature acquisition unit can acquire the temperature of the coolant in the second flow channel and generate a temperature signal; An external control unit can receive the temperature signal and adjust the opening of the valve.

8. The cooling structure according to claim 6, characterized in that: A first cross-connector is provided on one side of the structural body. The first cross-connector connects the first flow channel and the liquid inlet, and the flow regulating device is provided on the first cross-connector, and / or, A second cross-connector is provided on one side of the main body of the structure. The second cross-connector connects the first flow channel and the liquid outlet, and the flow regulating device is provided on the second cross-connector.

9. The cooling structure according to claim 8, characterized in that: The first flow channel is connected in parallel to the second flow channel, and the second flow channel branches to form a first connecting flow channel and a second connecting flow channel extending toward the first flow channel; The first connecting channel is connected to the first channel, and the second connecting channel is connected to the first channel through the first cross-connector.

10. A battery pack, characterized in that: The battery pack includes a housing, the BDU assembly disposed within the housing, and a cooling structure as claimed in any one of claims 1 to 9.

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