Battery disconnect unit and battery pack

Abstract

A battery disconnect unit (10) and a battery pack. The battery disconnect unit (10) comprises: an upper shell (2) and a lower shell (3), which are arranged opposite each other, the upper shell (2) and the lower shell (3) enclosing to form an accommodating cavity; a component (4), which is provided in the accommodating cavity, the component (4) being connected to at least one of the upper shell (2) and the lower shell (3), and the component (4) being configured to disconnect or connect a circuit of the battery pack; and a flexible liquid-cooling plate (1), which is provided in the accommodating cavity, the flexible liquid-cooling plate (1) being in thermal conductive connection with at least part of the component (4) to perform heat dissipation on the component (4), and at least part of the flexible liquid-cooling plate (1) penetrating the upper shell (2) to connect with an external liquid-cooling circuit. By using the bendability of the flexible liquid-cooling plate (1), the flexible liquid-cooling plate (1) can be bent into different shapes to fit with the component (4), thereby not only improving the universality and spatial configuration flexibility of the flexible liquid-cooling plate (1), but also enhancing the heat dissipation effect of the battery disconnect unit (10).

Description

Battery disconnect unit and battery pack

[0001] This application claims priority to the Chinese patent application filed with the China Patent Office on February 27, 2024, with application number 202420364611.3 and invention name “A battery disconnection unit and battery pack”, the entire contents of which are incorporated by reference into this application. Technical Field

[0002] The present application belongs to the technical field of electric vehicle batteries, and specifically relates to a battery disconnect unit and a battery pack. Background Art

[0003] The Battery Disconnect Unit (BDU) is a device that disconnects and connects high voltage to the power battery of new energy vehicles. It is the working unit for high voltage distribution, disconnection, and short-circuit protection of the battery system. It generates heat during operation. To prevent the heat from affecting the performance of the BDU, it needs to be effectively cooled.

[0004] In the prior art, a liquid cooling plate is typically used to dissipate heat from components within the battery disconnect unit. However, once manufactured, these conventional liquid cooling plates have a fixed form factor, resulting in limited versatility and limited spatial configuration flexibility, which in turn leads to poor heat dissipation within the battery disconnect unit.

[0005] Summary of the Invention

[0006] The present application aims to provide a battery disconnect unit and a battery pack to solve the problem that the existing liquid cooling plate has poor versatility and low spatial configuration flexibility, resulting in poor heat dissipation effect of the battery disconnect unit.

[0007] In order to solve the above technical problems, this application is implemented as follows:

[0008] In a first aspect, the present application discloses a battery disconnect unit, which is applied to a battery pack. The battery disconnect unit includes:

[0009] An upper shell and a lower shell are arranged opposite to each other, and the upper shell and the lower shell together form a receiving cavity;

[0010] Components, the components are arranged in the accommodating cavity, and the components are connected to at least one of the upper shell and the lower shell;

[0011] A flexible liquid cooling plate is disposed in the accommodating cavity and is thermally connected to at least a portion of the components to dissipate heat from the components. At least a portion of the flexible liquid cooling plate passes through the upper shell to connect to an external liquid cooling circuit.

[0012] Optionally, the flexible liquid cooling plate includes:

[0013] Plate walls, the plate walls enclose forming a liquid cooling channel, the liquid cooling channel being used for circulating a cooling liquid;

[0014] The plate wall includes a bent body layer and a flexible deformable layer. The bent body layer encloses the liquid cooling channel. The flexible deformable layer is at least arranged on a side of the bent body layer away from the liquid cooling channel.

[0015] Optionally, the stiffness of the bending body layer is greater than the stiffness of the flexible deformation layer.

[0016] Optionally, the thickness of the bent body layer is less than or equal to 1 mm.

[0017] Optionally, the thickness of the flexible deformation layer is less than or equal to 1 mm.

[0018] Optionally, the bending body layer is made of metal material, and the flexible deformation layer is made of insulating material.

[0019] Optionally, the flexible liquid cooling plate abuts between the component and the upper shell.

[0020] Optionally, the flexible liquid cooling plate abuts between the component and the lower shell.

[0021] Optionally, the component includes a connector, and the connector is used to connect the component to at least one of the upper shell and the lower shell;

[0022] The flexible liquid cooling plate is further provided with an avoidance groove, and the connecting piece is provided through the avoidance groove.

[0023] Optionally, a plurality of the components are provided, and the plurality of the components are arranged at intervals, and at least part of the flexible liquid cooling plate abuts between two adjacent components.

[0024] Optionally, the flexible liquid cooling plate is arranged around the plurality of components, and the flexible liquid cooling plate is in contact with the plurality of components respectively.

[0025] Optionally, the components include at least one of a connecting bar, an aluminum bar, a relay, a fuse, a current collector, and a battery management unit.

[0026] Optionally, the flexible liquid cooling plate also passes through the lower shell.

[0027] In a second aspect, the present application also discloses a battery pack, which includes multiple battery cells, a thermal management system and a battery disconnection unit as described above, wherein the components are electrically connected to the battery cells, the thermal management system is thermally connected to the battery cells, and the thermal management system is connected to the flexible liquid cooling plate.

[0028] In an embodiment of the present application, the battery disconnect unit includes: an upper shell and a lower shell disposed opposite each other, the upper shell and the lower shell enclosing a housing cavity; a component disposed within the housing cavity and connected to at least one of the upper shell and the lower shell; and a flexible liquid cooling plate disposed within the housing cavity and thermally connected to at least a portion of the component to dissipate heat from the component, with at least a portion of the flexible liquid cooling plate extending through the upper shell to connect to an external liquid cooling circuit. Thus, due to the provision of the flexible liquid cooling plate and its thermally conductive connection to at least a portion of the component, the flexible liquid cooling plate's bendability allows it to be bent into different shapes to accommodate the shapes of different components, thereby improving the versatility and spatial configuration flexibility of the flexible liquid cooling plate. Furthermore, the flexible liquid cooling plate's bendability allows it to bend to conform to the component, thereby improving the heat dissipation efficiency of the battery disconnect unit.

[0029] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become obvious from the description below, or will be learned through practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0031] FIG1 is a schematic structural diagram of a flexible liquid cooling plate in a battery disconnection unit provided in an embodiment of the present application;

[0032] FIG2 is a schematic diagram of an assembly of a battery disconnection unit according to the first embodiment of the present application;

[0033] FIG3 is a second assembly diagram of a battery disconnect unit provided in Example 1 of the present application;

[0034] FIG4 is a schematic diagram of an assembly of a battery disconnection unit according to a second embodiment of the present application;

[0035] FIG5 is a second schematic diagram of an assembly of a battery disconnect unit provided in Example 2 of the present application;

[0036] FIG6 is one of the assembly diagrams of a battery disconnection unit provided in Example 3 of the present application;

[0037] FIG7 is a second schematic diagram of an assembly of a battery disconnect unit provided in Example 3 of the present application;

[0038] FIG8 is a schematic structural diagram of a battery pack provided in an embodiment of the present application;

[0039] FIG9 is an exploded view of the battery pack provided in an embodiment of the present application.

[0040] Figure numerals: 10. Battery disconnect unit, 1. Flexible liquid cooling plate, 11. Plate wall, 111. Bent body layer, 112. Flexible deformation layer, 113. Avoidance groove, 12. Liquid cooling channel, 2. Upper shell, 3. Lower shell, 4. Components, 41. Connector, 20. Accommodation cavity; 5. Battery cell; 6. Thermal management system. Specific embodiments

[0041] The embodiments of the present application will be described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application and are not to be construed as limiting the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0042] The terms "first" and "second" in the specification and claims of this application may explicitly or implicitly refer to one or more of the features. Throughout the description of this application, unless otherwise specified, "plurality" means two or more. Furthermore, "and / or" in the specification and claims refers to at least one of the connected entities, and the character " / " generally indicates an "or" relationship between the connected entities.

[0043] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying 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.

[0044] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0045] An embodiment of the present application provides a battery disconnection unit, which will be described in detail below with reference to the accompanying drawings.

[0046] Referring to Figure 1, a structural schematic diagram of a flexible liquid cooling plate in a battery disconnection unit provided in an embodiment of the present application is shown; referring to Figures 2 to 3, an assembly schematic diagram of a battery disconnection unit provided in Example 1 of the present application is shown; referring to Figures 4 to 5, an assembly schematic diagram of a battery disconnection unit provided in Example 2 of the present application is shown; referring to Figures 6 to 7, an assembly schematic diagram of a battery disconnection unit provided in Example 3 of the present application is shown.

[0047] As shown in Figures 2 to 6, an embodiment of the present application provides a battery disconnection unit 10, which is applied to a battery pack. The battery disconnection unit 10 includes: an upper shell 2 and a lower shell 3 arranged opposite to each other, and the upper shell 2 and the lower shell 3 enclose a receiving cavity 20; a component 4, the component 4 is arranged in the receiving cavity 20, and the component 4 is connected to at least one of the upper shell 2 and the lower shell 3; a flexible liquid cooling plate 1, the flexible liquid cooling plate 1 is arranged in the receiving cavity 20, and the flexible liquid cooling plate 1 is thermally connected to at least part of the component 4 to dissipate heat from the component 4, and at least part of the flexible liquid cooling plate 1 passes through the upper shell 2 to connect to an external liquid cooling circuit.

[0048] In the embodiment of the present application, the flexible liquid cooling plate 1 is provided and thermally connected to at least a portion of the component 4. On the one hand, the bendability of the flexible liquid cooling plate 1 allows the flexible liquid cooling plate 1 to be bent into different shapes to accommodate the shapes of different components 4, thereby improving the versatility and spatial configuration flexibility of the flexible liquid cooling plate 1. On the other hand, the bendability of the flexible liquid cooling plate 1 allows the flexible liquid cooling plate 1 to be bent to fit the component 4, thereby improving the heat dissipation effect of the battery disconnect unit 10.

[0049] It should be noted that, because the flexible liquid cooling plate 1 is bendable, it can be manufactured to a certain length according to actual needs. During assembly of the battery disconnect unit 10, the flexible liquid cooling plate 1 can be bent into the desired shape to accommodate components 4 of varying specifications and shapes. In other words, the flexible liquid cooling plate 1 provided in this embodiment of the present application can be applied to various heat dissipation scenarios, significantly improving its versatility.

[0050] In actual application, the liquid cooling channel 12 also includes a liquid inlet and a liquid outlet, the liquid inlet is provided with a liquid inlet joint, and the liquid outlet is provided with a liquid outlet joint. The flexible liquid cooling plate 1 located outside the shell can be connected to the external liquid cooling circuit through the liquid inlet joint and the liquid outlet joint to realize the flow of coolant, thereby improving the liquid cooling effect of the flexible liquid cooling plate 1, which is beneficial to improving the heat dissipation effect of the battery cut-off unit 10. Among them, the shell includes an upper shell 2 and a lower shell 3 that are connected to each other. The liquid inlet joint and the liquid outlet joint can be connected to the external liquid cooling circuit by interference fit, bonding, plugging, snap-on, screw connection or other methods, which are not limited here. In addition, for heat dissipation application scenarios where temperature regulation requirements are not high and focus on maintaining temperature stability, the flexible liquid cooling plate 1 can also be set to be closed, and heat dissipation is achieved only through heat exchange between the internal coolant and the product. In this case, the liquid inlet joint and the liquid outlet joint connected to the external liquid cooling circuit can be omitted.

[0051] In some embodiments, the flexible liquid cooling plate 1 can pass through one of the upper shell 2 and the lower shell 3 to connect to the external liquid cooling circuit, or the flexible liquid cooling plate 1 can pass through both the upper shell 2 and the lower shell 3 to connect to the external liquid cooling circuit. It can be flexibly set according to actual needs and is not limited here.

[0052] As shown in Figure 1, the flexible liquid cooling plate 1 includes: a plate wall 11, the plate wall 11 encloses a liquid cooling channel 12, and the liquid cooling channel 12 is used for circulating the cooling liquid; the plate wall 11 includes a bent body layer 111 and a flexible deformation layer 112, wherein the bent body layer 111 encloses the liquid cooling channel 12, and the flexible deformation layer 112 is at least arranged on the side of the bent body layer 111 away from the liquid cooling channel 12.

[0053] In some embodiments, a flexible deformation layer 112 is provided on both the side of the bent body layer 111 away from the liquid-cooling channel 12 and the side close to the liquid-cooling channel 12 .

[0054] In this embodiment, a flexible deformation layer 112 is provided on a side of the bent body layer 111 away from the liquid-cooling channel 12 .

[0055] In the embodiment of the present application, the plate wall 11 of the flexible liquid cooling plate 1 includes a bent main layer 111 and a flexible deformable layer 112. The bent main layer 111 can be bent to conform to the shape of the component 4, thereby increasing the thermal contact area between the flexible liquid cooling plate 1 and the component 4 and improving the heat dissipation effect of the component 4. The flexible deformable layer 112 can deform. During the liquid cooling process, the flexible deformable layer 112 can compress or expand to more fully contact the component 4, ensuring uniform heat dissipation of the component 4 and avoiding damage caused by overheating due to insufficient local cooling.

[0056] It should be noted that the bending body layer 111 refers to a layered structure with a certain rigidity, which can be bent, shaped, and can automatically restore its original shape; the flexible deformable layer 112 refers to a layered structure with a certain flexibility, which can be compressed or expanded under the influence of the external environment. In order to make the flexible liquid cooling plate 1 have the functions of being both bendable and deformable, the bending body layer 111 and the flexible deformable layer 112 need to have different rigidities. In the embodiment of the present application, the rigidity of the bending body layer 111 is greater than the rigidity of the flexible deformable layer 112, so that the flexible liquid cooling plate 1 can still have the ability to deform while keeping the liquid cooling channel 12 conductive, thereby better adapting to the arrangement of the components 4 inside the battery cut-off unit 10, thereby improving the layout flexibility of the components 4. In addition, the drawings of the embodiment of the present application only show the situation where the flexible deformable layer 112 is arranged on the side of the bending body layer 111 away from the liquid cooling channel 12. In practical applications, those skilled in the art may also provide flexible deformation layers 112 on both sides of the bent body layer 111 according to actual needs, so as to further protect the bent body layer 111 and improve the service life of the flexible liquid cooling plate 1 .

[0057] In actual application, as shown in Figure 1, the flexible liquid cooling plate 1 is formed by pressing two opposing walls 11 together. Specifically, the edges of the two walls 11 are pressed together to enclose a liquid cooling channel 12 for the circulation of coolant. The pressing methods of the two walls 11 include, but are not limited to, hot pressing, cold rolling, welding, gluing, or other connection methods. The present embodiment does not limit the pressing method of the two walls 11, and those skilled in the art may adjust it according to actual needs.

[0058] Optionally, the plate wall 11 is in the form of a thin sheet. Specifically, the thickness of the bent body layer 111 thereof is less than or equal to 1 mm; and the thickness of the flexible deformation layer 112 thereof is less than or equal to 1 mm.

[0059] In practical applications, when the thickness of the bending body layer 111 is less than or equal to 1 mm, on the one hand, it facilitates the bending and shaping of the flexible liquid cooling plate 1; on the other hand, it can save materials and reduce the weight of the flexible liquid cooling plate 1, which is conducive to achieving lightweight battery cut-off unit 10. When the thickness of the flexible deformable layer 112 is less than or equal to 1 mm, the flexible liquid cooling plate 1 can have better deformation ability. At the same time, as the thickness of the flexible deformable layer 112 decreases, the thermal resistance of the flexible deformable layer 112 is reduced, which is conducive to improving the liquid cooling efficiency of the flexible liquid cooling plate 1. It should be noted that, on the basis of satisfying the flexible liquid cooling plate 1 having both bendable and deformable functions, those skilled in the art can adjust the specific thickness of the bending body layer 111 and the flexible deformable layer 112 as needed to suit different heat dissipation application scenarios.

[0060] In some optional embodiments of the present application, the bending body layer 111 is made of metal material, and the flexible deformation layer 112 is made of insulating material.

[0061] In the embodiment of the present application, the bent body layer 111 is made of metal, which has high rigidity, facilitating the bending and shaping of the flexible liquid cooling plate 1. Furthermore, the formed flexible liquid cooling plate 1 can maintain the internal liquid cooling channel 12 in a conductive state, thereby increasing the thermal contact area between the flexible liquid cooling plate 1 and the component 4, further improving the heat dissipation effect of the component 4. Furthermore, metal generally has good thermal conductivity, so the heat of the component 4 can be transferred through the bent body layer 111 to the coolant flowing in the liquid cooling channel 12, thereby effectively dissipating heat from the component 4. Since the flexible deformable layer 112 is made of an insulating material, the bent body layer 111 and the component 4 are insulated, eliminating the need for a separate insulating thermal conductor, further reducing the manufacturing cost of the battery disconnect unit.

[0062] It should be noted that metal materials include, but are not limited to, aluminum alloys, stainless steel, or other alloy materials, and are not limited here. Those skilled in the art can select as needed. Insulating materials include, but are not limited to, rubber, polyethylene (PE), polyoxymethylene (POM), polyamide (PA), polyphenylene sulfide (PPS), polyester (PET), cross-linked polyolefins, styrene block copolymers, thermoplastic elastomers, silicone elastomers, or other polymer materials, and are not limited here. Those skilled in the art can select as needed.

[0063] In practical applications, the flexible liquid cooling plate 1 provided in the embodiment of the present application has three configuration modes in the battery disconnection unit 10 , which are described in detail below with reference to the accompanying drawings.

[0064] Example 1

[0065] In actual applications, multiple components 4 are arranged inside the battery disconnection unit 10, and the multiple components 4 are electrically connected through a copper busbar. Under high current charging and discharging conditions, the connection point between the copper busbar and the component 4 is the part with the highest heat generation, and the connection point is generally arranged on the top of the component 4.

[0066] Based on the above application scenarios, as shown in Figures 2 and 3, in one embodiment, the flexible liquid cooling plate 1 is in contact between the component 4 and the upper shell 2. During the assembly process of the battery cut-off unit 10, first, the flexible liquid cooling plate 1 is bent and placed on top of the component 4; then, the upper shell 2 is installed so that the flexible liquid cooling plate 1 is pressed between the upper shell 2 and the component 4. In this way, on the one hand, the bent flexible liquid cooling plate 1 can fully contact the component 4, the copper busbar, and the connection point located on the top of the component 4, and in the process of heat exchange between the plate wall 11 and the above-mentioned heat-generating component, the flexible deformation layer 112 of the plate wall 11 expands due to heat, thereby absorbing the design tolerance, further allowing the flexible liquid cooling plate 1 to more fully contact the above-mentioned heat-generating component, and avoiding damage caused by local overheating of the heat-generating component due to uneven cooling. On the other hand, the squeezing of the upper shell 2 and the heat-generating components can not only make the flexible liquid cooling plate 1 fit the components 4 better, which is beneficial to improving the heat dissipation effect of the components 4; it can also limit the flexible liquid cooling plate 1, and there is no need to set up a separate fixing structure to fix the flexible liquid cooling plate 1, which is beneficial to improving the assembly efficiency of the battery disconnection unit 10.

[0067] Optionally, component 4 is secured by connection to upper housing 2. In this case, component 4 includes connector 41 for connecting component 4 to upper housing 2. Flexible liquid cooling plate 1 also includes escape groove 113, through which connector 41 extends. Thus, the escape groove 113 effectively avoids connector 41, ensuring sufficient thermal contact area between flexible liquid cooling plate 1 and component 4, thereby improving heat dissipation from component 4.

[0068] Example 2

[0069] In practical applications, one of the traditional heat dissipation methods of the battery disconnect unit 10 is to dispose a liquid cooling plate under the lower housing 3 . However, due to the obstruction of the lower housing 3 , the heat conduction effect of the components 4 is poor.

[0070] Based on the above application scenarios, as shown in Figures 4 and 5, in one embodiment, the flexible liquid cooling plate 1 abuts between the component 4 and the lower shell 3. During the assembly process of the battery disconnect unit 10, the flexible liquid cooling plate 1 is first bent and placed above the lower shell 3; then, the component 4 and the upper shell 2 are installed so that the flexible liquid cooling plate 1 is pressed between the lower shell 3 and the component 4. In this way, on the one hand, the flexible liquid cooling plate 1 can directly absorb the heat generated by the component 4, effectively dissipating the heat of the component 4, thereby reducing the selection requirements of the component 4 and helping to reduce the manufacturing cost of the battery disconnect unit 10. On the other hand, the compression deformation of the flexible deformable layer 112 not only allows the flexible liquid cooling plate 1 to fully fit the component 4, which is beneficial for improving the heat dissipation effect of the component 4, but also allows the bent body layer 111 to flexibly contact the component 4, thereby effectively protecting the bent body layer 111.

[0071] Optionally, component 4 is secured by connection to lower housing 3. In this case, component 4 includes connector 41 for connecting component 4 to lower housing 3. Flexible liquid cooling plate 1 is also provided with a relief groove 113, through which connector 41 extends. Thus, the provision of relief groove 113 on flexible liquid cooling plate 1 effectively avoids connector 41, while also ensuring sufficient thermal contact area between flexible liquid cooling plate 1 and component 4, thereby improving heat dissipation from component 4.

[0072] Example 3

[0073] During vehicle driving, due to the influence of different road conditions, different emergencies, different driving habits, different external environments, etc., some components 4 in the battery disconnect unit 10 may malfunction, thereby affecting the normal operation of other components 4, resulting in a reduction in the service life of the battery disconnect unit 10.

[0074] Based on the above application scenarios, as shown in Figures 6 and 7, in one embodiment, a plurality of components 4 are provided, and the plurality of components 4 are arranged at intervals, and at least part of the flexible liquid cooling plate 1 abuts between two adjacent components 4. In this way, the two adjacent components 4 can be isolated, and the abnormal component 4 can be prevented from affecting the normal operation of other adjacent components 4, thereby reducing operation and maintenance costs and increasing the service life of the battery disconnection unit 10. In addition, in actual applications, in order to achieve heat dissipation of multiple components 4, the flexible liquid cooling plate 1 is sequentially arranged around the multiple components 4, so that multiple sides of the component 4 can be in contact with the flexible liquid cooling plate 1, that is, the thermal contact area between the component 4 and the flexible liquid cooling plate 1 is increased, which is conducive to further improving the heat dissipation effect of the component 4.

[0075] It should be noted that when the flexible liquid cooling plate 1 is installed in the battery disconnect unit 10 using the three methods described above, the shape of the components 4 or the spatial shape within the battery disconnect unit 10 may vary. Therefore, during assembly of the battery disconnect unit 10, the operator can bend the flexible liquid cooling plate 1 according to the final fixed shape of the components 4 so that the assembled flexible liquid cooling plate 1 can abut against multiple components 4 respectively, thereby increasing the thermal contact area between the components 4 and the flexible liquid cooling plate 1, which is beneficial for improving the heat dissipation effect of the battery disconnect unit 10.

[0076] Furthermore, the drawings of this application only illustrate the flexible liquid cooling plate 1 being individually disposed on top of a component 4, on the bottom of a component 4, and wound between components 4. In actual applications, those skilled in the art may also simultaneously deploy two or three flexible liquid cooling plates 1 as needed, and dispose the flexible liquid cooling plates 1 on top of a component 4, on the bottom of a component 4, and / or wound between components 4 as needed, thereby achieving simultaneous heat dissipation from multiple locations of the component, further improving the heat dissipation effect of the component 4 and enhancing the safety of the battery disconnect unit 10.

[0077] It should be noted that the components 4 include at least one of a connecting bar, an aluminum bar, a relay, a fuse, a current collector, and a battery management unit (BMU). The embodiment of the present application does not limit the type of the components 4. Those skilled in the art can apply the flexible liquid cooling plate 1 provided in the embodiment of the present application to the above-mentioned components 4 according to actual needs to achieve efficient heat dissipation of the components 4.

[0078] In summary, the battery disconnection unit 10 provided in the embodiment of the present application has at least the following advantages:

[0079] In the embodiment of the present application, the battery disconnect unit 10 includes: an upper housing 2 and a lower housing 3 disposed opposite each other, the upper housing 2 and the lower housing 3 enclosing a housing cavity 20; a component 4 disposed within the housing cavity 20 and connected to at least one of the upper housing 2 and the lower housing 3, the component 4 being used to disconnect or connect the circuit of the battery pack; and a flexible liquid cooling plate 1 disposed within the housing cavity 20 and thermally connected to at least a portion of the component 4 to dissipate heat from the component 4, with at least a portion of the flexible liquid cooling plate 1 extending through the upper housing 2 and / or the lower housing 3 to connect to an external liquid cooling circuit. Thus, the flexible liquid cooling plate 1, thermally connected to at least a portion of the component 4, can be bent into different shapes to accommodate the shapes of different components 4, thereby improving the versatility and spatial configuration flexibility of the flexible liquid cooling plate 1. On the other hand, by utilizing the bendability of the flexible liquid cooling plate 1 , the flexible liquid cooling plate 1 can be bent to fit the components 4 , which is beneficial to improving the heat dissipation effect of the battery disconnect unit 10 .

[0080] As shown in Figures 2, 8, and 9, embodiments of the present application further provide a battery pack comprising a plurality of battery cells 5, a thermal management system 6, and a battery disconnect unit 10 according to any of the aforementioned embodiments. Components 4 are electrically connected to the battery cells 5, and the thermal management system 6 is thermally conductively connected to the battery cells 5. The thermal management system 6 is also in communication with a flexible liquid cooling plate 1. Specifically, the thermal management system 6 includes a liquid cooling circuit, and the flexible liquid cooling plate 1 is in communication with the liquid cooling circuit to enable the flow of coolant, thereby achieving efficient heat dissipation of the components 4 in the battery disconnect unit 10.

[0081] It should be noted that in the embodiment of the present application, the structure of the battery disconnection unit 10 is the same as the structure of the battery disconnection unit 10 described in any of the above embodiments, and its beneficial effects are also similar, which will not be described in detail here.

[0082] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. 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 any one or more embodiments or examples.

[0083] Although the embodiments of the present application have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions, and variations may be made to the embodiments without departing from the principles and intent of the present application, and that the scope of the present application is defined by the claims and their equivalents.

Claims

1. A battery disconnect unit (10), applied to a battery pack, wherein: The battery disconnection unit (10) comprises: An upper shell (2) and a lower shell (3) are arranged opposite to each other, and the upper shell (2) and the lower shell (3) enclose a receiving cavity (20); A component (4), the component (4) being disposed in the accommodating cavity (20), and the component (4) being connected to at least one of the upper shell (2) and the lower shell (3); A flexible liquid cooling plate (1), the flexible liquid cooling plate (1) being arranged in the accommodating cavity (20), and the flexible liquid cooling plate (1) being thermally connected to at least a portion of the component (4) to dissipate heat from the component (4), and at least a portion of the flexible liquid cooling plate (1) passing through the upper shell (2) to connect to an external liquid cooling circuit.

2. The battery disconnect unit (10) according to claim 1, wherein: The flexible liquid cooling plate (1) comprises: A plate wall (11), wherein the plate wall (11) encloses a liquid cooling channel (12), and the liquid cooling channel (12) is used for circulating a cooling liquid; The plate wall (11) comprises a bent body layer (111) and a flexible deformable layer (112), wherein the bent body layer (111) encloses and forms the liquid cooling channel (12), and the flexible deformable layer (112) is at least arranged on a side of the bent body layer (111) away from the liquid cooling channel (12).

3. The battery disconnect unit (10) according to claim 2, wherein: The rigidity of the bending body layer (111) is greater than the rigidity of the flexible deformation layer (112).

4. The battery disconnect unit (10) according to claim 2, wherein: The thickness of the bent body layer (111) is less than or equal to 1 mm.

5. The battery disconnect unit according to claim 2, wherein: The thickness of the flexible deformation layer (112) is less than or equal to 1 mm.

6. The battery disconnect unit (10) according to claim 2, wherein: The bending body layer (111) is made of metal material, and the flexible deformation layer (112) is made of insulating material.

7. The battery disconnect unit (10) according to claim 1, wherein: The flexible liquid cooling plate (1) abuts between the component (4) and the upper shell (2).

8. The battery disconnect unit (10) according to claim 1, wherein: The flexible liquid cooling plate (1) abuts between the component (4) and the lower shell (3).

9. A battery disconnect unit (10) according to claim 1, characterized in that: The component (4) comprises a connecting member (41), and the connecting member (41) is used to connect the component (4) to at least one of the upper housing (2) and the lower housing (3); The flexible liquid cooling plate (1) is further provided with an avoidance groove (113), and the connecting member (41) is provided through the avoidance groove (113).

10. The battery disconnect unit (10) according to claim 1, wherein: A plurality of the components (4) are provided, and the plurality of the components (4) are arranged at intervals, and at least part of the flexible liquid cooling plate (1) abuts between two adjacent components (4).

11. The battery disconnect unit (10) according to claim 10, wherein: The flexible liquid cooling plate (1) is arranged around the plurality of components (4), and the flexible liquid cooling plate (1) is in contact with the plurality of components (4) respectively.

12. The battery disconnect unit (10) according to claim 1, wherein: The components (4) include at least one of a connecting bar, an aluminum bar, a relay, a fuse, a current collector, and a battery management unit.

13. The battery disconnect unit (10) according to claim 1, wherein: The flexible liquid cooling plate (1) also passes through the lower shell (3).

14. A battery pack, characterized in that: The battery pack comprises a plurality of battery cells (5), a thermal management system (6) and a battery disconnection unit (10) according to any one of claims 1 to 13, wherein the component (4) is electrically connected to the battery cells (5), the thermal management system (6) is thermally connected to the battery cells (5), and the thermal management system (6) is in communication with the flexible liquid cooling plate (1).

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