Battery pack and electrical apparatus

Abstract

Disclosed in the present application are a battery pack and an electrical apparatus. The battery pack comprises a battery cell, a thermal management component and a power distribution assembly, the power distribution assembly and the battery cell being provided on the same side of the thermal management component; the power distribution assembly comprises a housing, a first electrical component and a first connection member, the housing being provided with an accommodation cavity and a first through hole, and the first through hole passing through the side of the housing facing the thermal management component and being in communication with the accommodation cavity; the first electrical component is provided in the accommodation cavity and is connected to the housing, and the first electrical component comprises a first terminal, the first terminal being provided facing the thermal management component, and at least part of the first terminal being exposed from the first through hole; the first connection member comprises a first section and a second section connected to the first section, the first section being provided in the accommodation cavity and detachably connected to the housing, and the second section being provided on the side of the first terminal facing the thermal management component and being conductively connected to the first terminal; the second section passes through the first through hole, and the side of the second section away from the first terminal is connected to the thermal management component.

Description

Battery packs and electrical devices

[0001] This application claims priority to Chinese Patent Application No. 202422485844.1, filed on October 15, 2024, entitled "Battery Pack and Power Supply Device", the entire contents of which are incorporated herein by reference. Technical Field

[0002] This application belongs to the field of battery technology, specifically relating to a battery pack and an electrical device. Background Technology

[0003] As an important component of the power battery, the high-voltage distribution box generates heat due to the current flowing through its electrical components when the power battery is in operation. The higher the current, the more severe the heating becomes, which can lead to a significant reduction in the lifespan of the electrical components. Summary of the Invention

[0004] This application provides a battery pack designed to address the problem that electrical components in existing high-voltage distribution boxes generate heat during operation, leading to a decrease in lifespan. Another objective of this application is to provide an electrical device.

[0005] Technical solution: A battery pack according to an embodiment of this application includes:

[0006] Battery cell;

[0007] A thermal management component is connected to one side of the battery cell;

[0008] A power distribution assembly, electrically connected to the battery cell, wherein the power distribution assembly and the battery cell are disposed on the same side of the thermal management component; the power distribution assembly includes:

[0009] The housing has a receiving cavity and a first through hole, the first through hole penetrating through the housing on the side facing the thermal management component and communicating with the receiving cavity;

[0010] A first electrical component is disposed in the receiving cavity and connected to the housing. The first electrical component includes a first terminal, which is disposed toward the thermal management component, and at least a portion of the first terminal is exposed from the first through hole.

[0011] The first connector includes a first segment and a second segment connected to the first segment. The first segment is disposed in the receiving cavity and detachably connected to the housing. The second segment is disposed on the side of the first terminal facing the thermal management component and is electrically connected to the first terminal. The second segment passes through the first through hole and is connected to the thermal management component on the side of the second segment away from the first terminal.

[0012] In some embodiments, the housing has a second through hole and a third through hole, both of which communicate with the receiving cavity; the power distribution assembly further includes:

[0013] A second electrical component is disposed in the receiving cavity and connected to the housing. A portion of the second electrical component passes through the third through hole and is connected to the thermal management component. The second electrical component includes a second terminal and a third terminal, and the second terminal is electrically connected to the first terminal through the first connector.

[0014] A second connector is disposed in the receiving cavity and connected to the housing. At least a portion of the second connector is disposed on the side of the third terminal away from the thermal management component. The second connector is electrically connected to the third terminal.

[0015] A second heat-conducting component is disposed in the receiving cavity and connected to the housing. The second heat-conducting component is connected to the side of the third terminal away from the second connector. The second heat-conducting component passes through the second through hole and is connected to the thermal management component.

[0016] In some embodiments, the second electrical component includes a second body, which is connected to the second terminal and the third terminal respectively, and the second heat-conducting component is spaced apart from the second body.

[0017] In some embodiments, the second heat-conducting component has a groove disposed on the side of the second heat-conducting component facing the third terminal, and the third terminal is disposed in the groove and connected to the second heat-conducting component.

[0018] In some embodiments, the second segment is welded to the first terminal.

[0019] In some embodiments, the outer surface of the first connector is provided with an anti-corrosion layer, which is at least one of a tin layer and a silver layer.

[0020] In some embodiments, the power distribution assembly includes a plurality of first electrical components and a plurality of first connectors, the plurality of first electrical components being electrically connected, each first electrical component including a plurality of first terminals, each first terminal being connected to a corresponding second segment; the plurality of second segments being disposed within the first through hole and connected to the thermal management component.

[0021] In some embodiments, the housing has a plurality of first through holes, and each second segment is disposed within a corresponding first through hole.

[0022] In some embodiments, the battery pack further includes:

[0023] The enclosure has storage space;

[0024] A cover, connected to the box body and sealing the accommodating space;

[0025] The battery cell, the thermal management component, and the power distribution assembly are all disposed in the accommodating space, with the thermal management component disposed on the side of the battery cell and the power distribution assembly away from the cover.

[0026] In some embodiments, the battery pack includes an insulating layer disposed on the side of the second segment and the second thermally conductive component facing the thermal management component, and the insulating layer is connected to the second segment, the second thermally conductive component and the thermal management component respectively.

[0027] In some embodiments, the battery pack further includes a first thermally conductive component disposed between the insulating layer and the thermal management component, and the first thermally conductive component is connected to both the insulating layer and the thermal management component.

[0028] In some embodiments, the first thermally conductive component is a flexible insulating component.

[0029] Accordingly, the electrical device described in this application includes a battery pack as described in any of the foregoing embodiments.

[0030] Compared with the prior art, a battery pack according to an embodiment of this application includes a battery cell, a thermal management component, and a power distribution assembly. The thermal management component is connected to one side of the battery cell, and the power distribution assembly is electrically connected to the battery cell. The power distribution assembly and the battery cell are disposed on the same side of the thermal management component. The power distribution assembly includes a housing, a first electrical component, and a first connector. The housing has a receiving cavity and a first through hole. The first through hole passes through the side of the housing facing the thermal management component and communicates with the receiving cavity. The first electrical component is disposed in the receiving cavity and connected to the housing. The first electrical component includes a first terminal, which is disposed facing the thermal management component, and at least a portion of the first terminal is exposed through the first through hole. The first connector includes a first segment and a second segment connected to the first segment. The first segment is disposed in the receiving cavity and detachably connected to the housing. The second segment is disposed on the side of the first terminal facing the thermal management component and is electrically connected to the first terminal. The second segment passes through the first through hole, and the side of the second segment away from the first terminal is connected to the thermal management component. This application incorporates a first through-hole in the housing facing the thermal management component, allowing the end of the first connector connected to the first electrical component to protrude through the through-hole and exchange heat with the thermal management component. This enables the electrical component and the battery cell to share the thermal management component, saving internal space in the battery pack and improving heat exchange efficiency. The first connector is detachably connected to the housing, facilitating rapid assembly and disassembly of the first connector and the first electrical component, thus improving the assembly efficiency of the power distribution assembly. Furthermore, this application utilizes a second heat-conducting component to transfer heat from the terminals of the high-temperature second electrical component to the thermal management component, effectively reducing the temperature of the second electrical component and thereby significantly improving the overall current-carrying capacity of the power distribution assembly.

[0031] Compared with the prior art, an electrical device according to an embodiment of this application includes a battery pack as described in any of the foregoing embodiments. It is understood that the electrical device of this application includes all the technical features and effects of the aforementioned battery pack, which will not be repeated here. Attached Figure Description

[0032] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0033] Figure 1 is a schematic diagram of the overall structure of a battery pack according to an embodiment of this application;

[0034] Figure 2 is a schematic diagram of the structure of a battery pack according to an embodiment of this application after the top cover is removed;

[0035] Figure 3 is a top view of a battery pack according to an embodiment of this application after the top cover has been removed;

[0036] Figure 4 is a cross-sectional view of section AA in Figure 3;

[0037] Figure 5 is a sectional view of section BB in Figure 3;

[0038] Figure 6 is a schematic diagram of the overall structure of the power distribution component according to an embodiment of this application;

[0039] Figure 7 is an exploded view of the power distribution component according to an embodiment of this application;

[0040] Figure 8 is an enlarged view of part A in Figure 5;

[0041] Figure 9 is an enlarged view of part B in Figure 5;

[0042] Figure 10 is a schematic diagram of the overall structure of the second heat-conducting component according to an embodiment of this application;

[0043] Figure 11 is a schematic diagram of the connection between the second electrical component and the second heat-conducting component;

[0044] Figure 12 is a cross-sectional view of the first connector according to an embodiment of this application.

[0045] Explanation of reference numerals in the attached drawings: 1. Thermal management component; 2. Power distribution assembly; 21. Housing; 211. Receiving cavity; 212. First through hole; 213. Second through hole; 214. Third through hole; 22. First electrical component; 221. First terminal; 23. First connector; 231. First section; 232. Second section; 24. Second electrical component; 241. Second terminal; 242. Third terminal; 243. Second body; 25. Second connector; 26. Second heat-conducting component; 261. Groove; 27. Anti-corrosion layer; 3. Insulation layer; 4. First heat-conducting component; 5. Battery cell; 6. Housing; 61. Receiving space; 7. Cover. Detailed Implementation

[0046] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0047] In the description of this application, it should be understood that the terms "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this application 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 on this application. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more features. In the description of this application, "multiple" means two or more, and "at least one" can mean one, two, or more, unless otherwise explicitly specified. In the description of this application, "perpendicular" means completely perpendicular to 90° or almost completely perpendicular, for example, the range of included angles from 80° to 100° is considered perpendicular. Similarly, "parallel" means completely parallel or almost completely parallel, for example, the range of completely parallel angles from 10° is considered parallel.

[0048] A high-voltage distribution box is typically installed inside the battery pack to control its output power. The heat-generating contact points of the relays within this box are often located far from the bottom of the battery pack. However, typical battery pack cooling systems, such as liquid cooling plates, are located at the bottom. For relays requiring active cooling, a separate cooling system needs to be installed above the relay, which increases production costs and occupies internal space.

[0049] In view of this, embodiments of this application provide a battery pack designed to solve the above-mentioned problems.

[0050] Referring to Figures 1-7, a battery pack includes a battery cell 5, a thermal management component 1, and a power distribution assembly 2. The thermal management component 1 is connected to one side of the battery cell 5, and the power distribution assembly 2 is electrically connected to the battery cell 5. The power distribution assembly 2 and the battery cell 5 are disposed on the same side of the thermal management component 1. The power distribution assembly 2 includes a housing 21, a first electrical component 22, and a first connector 23. The housing 21 has a receiving cavity 211 and a first through hole 212. The first through hole 212 penetrates through the side of the housing 21 facing the thermal management component 1 and communicates with the receiving cavity 211. The first electrical component 22 is disposed in the receiving cavity 211 and connected to the housing 21. An electrical component 22 includes a first terminal 221 disposed toward the thermal management component 1, at least a portion of the first terminal 221 protruding from a first through hole 212; a first connector 23 includes a first segment 231 and a second segment 232 connected to the first segment 231, the first segment 231 being disposed in a receiving cavity 211 and detachably connected to the housing 21, the second segment 232 being disposed on the side of the first terminal 221 facing the thermal management component 1, the second segment 232 being electrically connected to the first terminal 221; the second segment 232 passing through the first through hole 212, the side of the second segment 232 away from the first terminal 221 being connected to the thermal management component 1.

[0051] In this embodiment, by providing a first through hole 212 in the housing 21, one end of the first connector 23 connected to the first electrical component 22 is exposed through the first through hole 212 and contacts the thermal management component 1 for heat exchange. This allows the electrical component and the battery cell 5 to share the thermal management component 1, saving internal space in the battery pack and achieving higher heat exchange efficiency. The first connector 23 is detachably connected to the housing 21, which facilitates the quick assembly and disassembly of the first connector 23 and the first electrical component 22, improving the assembly efficiency of the power distribution assembly 2.

[0052] Specifically, in this embodiment, the battery pack can contain multiple battery cells 5, which are arranged in an array and connected in series and parallel to ensure the battery pack's range. The thermal management component 1 can be a liquid cooling plate to cool the multiple battery cells 5 within the battery pack, effectively preventing thermal runaway of the battery cells 5. The power distribution component 2 can be a high-voltage distribution box to control the output power of the battery pack. The first electrical component 22 can be a relay, its first terminal 221 can be a relay contact, and the first connector 23 can be a copper busbar for connecting to the relay contact and further connecting the relay to the circuit of the high-voltage distribution box to control the battery pack's output power.

[0053] It should be noted that, in this embodiment, the first through hole 212 is formed on the side of the housing 21 facing the thermal management component 1, allowing the second segment 232 of the first connector 23 to protrude from the first through hole 212 and contact the thermal management component 1 for heat exchange, achieving a better heat exchange effect. At this time, the battery cells 5 and the first electrical component 22 in the battery pack share the thermal management component 1, effectively saving internal space and simplifying the battery pack structure. Simultaneously, the thermal management component 1 continuously cools the battery cells 5 in the battery pack, directly exchanging heat with the second segment 232. The second segment 232 exchanges heat with the first terminal 221 of the first electrical component 22, thereby effectively cooling the first electrical component 22. It should be noted that during this process, the cooling of the first electrical component 22 by the thermal management component 1 is active cooling, thus continuously maintaining the first electrical component 22 at a low temperature and ensuring the operational stability of the first electrical component 22.

[0054] It should also be noted that the first connector 23 is detachably connected to the housing 21. Specifically, the first segment 231 is detachably connected to the housing 21, and the second segment 232 is connected to the first terminal 221 and passes through the first through hole 212. The second segment 232 can be fitted against or spaced from the side wall of the first through hole 212, allowing it to be detached from the first through hole 212. This allows the first connector 23 to be connected to the first terminal 221 of the first electrical component 22, and then the first connector 23 and the first electrical component 22 to be installed into the receiving cavity 211 of the housing 21. Simultaneously, the first segment 231 is detachably connected to the housing 21, and the second segment 232 protrudes from the first through hole 212, thereby improving the assembly efficiency of the power distribution assembly 2. In this case, the first connector 23 can be connected to the housing 21 via the first segment 231, and the second segment 232 supports and connects the first electrical component 22. In this embodiment, the first connector 23 is detachably connected to the housing 21. Compared with pre-embedded copper busbars in the housing 21, the manufacturing process of the housing 21 is less difficult and the production efficiency is improved. At the same time, this application facilitates the connection between the first electrical component 22 and the first connector 23, and enables the rapid assembly of the power distribution assembly 2.

[0055] In addition, the first terminal 221 of this application is exposed at least partially from the first through hole 212. It can be that the first terminal is partially exposed from the first through hole 212, or the first terminal 221 is completely exposed from the first through hole 212.

[0056] It should also be noted that the first segment 231 of the first connector 23 in this embodiment is detachably connected to the housing 21. In this case, a threaded hole can be opened in the corresponding position in the housing 21, and a bolt can be tightened in the threaded hole to lock the first segment 231 onto the housing 21; or a flow nut can be pre-embedded in the corresponding position in the housing 21. In this case, the flow nut can not only cooperate with the bolt to lock and fix the first segment 231, but also connect other connectors at the other end of the flow nut with a bolt. In this case, the flow nut is not only used to provide a threaded hole to fix the connector, but also to realize the conductive connection between the two connectors.

[0057] As shown in Figure 5, in some embodiments, the housing 21 has a second through hole 213 and a third through hole 214, both of which communicate with the receiving cavity 211; the power distribution assembly 2 also includes a second electrical component 24, a second connector 25, and a second heat-conducting component 26. The second electrical component 24 is disposed in the receiving cavity 211 and connected to the housing 21, and a portion of the second electrical component 24 passes through the third through hole 214 and is connected to the thermal management component 1; the second electrical component 24 includes a second terminal 241 and a third terminal 242, the second terminal 241... 41 is electrically connected to the first terminal 221 via the first connector 23; the second connector 25 is disposed in the receiving cavity 211 and connected to the housing 21, at least a portion of the second connector 25 is disposed on the side of the third terminal 242 away from the thermal management component 1, and the second connector 25 is electrically connected to the third terminal 242; the second thermally conductive component 26 is disposed in the receiving cavity 211 and connected to the housing 21, and the second thermally conductive component 26 is connected to the side of the third terminal 242 away from the second connector 25; the second thermally conductive component 26 passes through the second through hole 213 and is connected to the thermal management component 1.

[0058] In this embodiment, the heat from the terminals of the high-temperature second electrical component 24 is transferred to the thermal management component 1 by the second heat-conducting component 26, which effectively reduces the temperature of the second electrical component 24 and thus effectively improves the overall overcurrent capacity of the power distribution assembly 2.

[0059] Specifically, the second electrical component 24 in this embodiment can be a fuse. A fuse melts quickly in high-temperature environments to disconnect the circuit, thereby protecting the battery pack. However, as the output power demand of the battery pack increases, a large current is required. This large current inevitably leads to an increase in the fuse temperature. This application addresses this by providing a second heat-conducting component 26 to transfer the heat from the fuse terminals to the thermal management component 1, effectively reducing the fuse temperature and thus improving the current-carrying capacity of the fuse (i.e., the second electrical component 24), which in turn improves the current-carrying capacity of the power distribution assembly 2. Therefore, this embodiment can achieve high current carrying capacity with small electrical components, thereby reducing the production cost of the power distribution assembly 2 and further reducing the production cost of the battery pack.

[0060] Referring to Figures 9 and 11, in some embodiments, the second electrical component 24 includes a second body 243, which is connected to the second terminal 241 and the third terminal 242 respectively, and the second heat-conducting component 26 is spaced apart from the second body 243.

[0061] In this embodiment, the second heat-conducting component 26 and the second body 243 of the second electrical component 24 are spaced apart. At this time, the second heat-conducting component 26 and the second body 243 do not contact each other, which can prevent the heat of the second heat-conducting component 26 from being transferred to the second body 243, thereby further ensuring a better cooling effect on the second electrical component 24.

[0062] Since the second heat-conducting component 26 is used to transfer the heat from the third terminal 242 to the thermal management component 1, thereby realizing heat exchange between the third terminal 242 and the thermal management component 1, the second heat-conducting component 26 will exchange the heat from the third terminal 242 into itself during the heat exchange process. At this time, the temperature of the second heat-conducting component 26 is relatively high. If there is no gap between the second body 243 and the second heat-conducting component 26, the second heat-conducting component 26 will transfer heat to the second body 243. At this time, the second heat-conducting component 26 will transfer a relatively high amount of heat to the second body 243, which will cause the temperature of the second body 243 to decrease more slowly. Therefore, by setting a gap between the second body 243 and the second heat-conducting component 26, a better cooling effect can be achieved.

[0063] As shown in FIG10, in some embodiments, the second heat-conducting component 26 has a groove 261, which is disposed on the side of the second heat-conducting component 26 facing the third terminal 242, and the third terminal 242 is disposed in the groove 261 and connected to the second heat-conducting component 26.

[0064] In this embodiment, the second heat-conducting component 26 is provided with a groove 261 for limiting and wrapping the third terminal 242, thereby achieving faster temperature transfer of the third terminal 242.

[0065] In some embodiments, the second segment 232 is welded to the first terminal 221.

[0066] As shown in Figure 8, in this embodiment, the second segment 232 is welded to the first terminal 221. At this point, the opposite side of the second segment 232 and the first terminal 221 are in contact. Compared to methods such as bolt connections, this reduces the contact resistance between the second segment 232 and the first terminal 221, thereby reducing heat generation at that location. Furthermore, replacing bolt connections with welding shortens the heat exchange path between the second segment 232 and the thermal management component 1, significantly increasing the contact area between them and allowing for large-area heat exchange, thus greatly improving cooling efficiency. The second segment 232 and the first terminal 221 can be connected using laser welding.

[0067] As shown in Figure 12, in some embodiments, the outer surface of the first connector 23 is provided with an anti-corrosion layer 27, which is at least one of a tin layer and a silver layer.

[0068] In this embodiment, by providing an anti-corrosion layer 27 on the surface of the first connector 23, the first connector 23 can be effectively protected, reducing the possibility of corrosion and thus ensuring the service life of the first connector 23. The anti-corrosion layer 27 is at least one of a tin layer and a silver layer, which facilitates the welding connection between the first connector 23 and the first terminal 221. Furthermore, the silver layer and the tin layer have lower internal resistance at their overlapping surfaces compared to other anti-corrosion layers 27, thereby further improving the current-carrying capacity.

[0069] As shown in Figures 5 and 7, in some embodiments, the power distribution assembly 2 includes a plurality of first electrical components 22 and a plurality of first connectors 23. The plurality of first electrical components 22 are electrically connected. Each first electrical component 22 includes a plurality of first terminals 221. Each first terminal 221 is connected to a corresponding second segment 232. The plurality of second segments 232 are disposed in the first through hole 212 and connected to the thermal management component 1.

[0070] In this embodiment, the power distribution assembly 2 typically includes multiple first electrical components 22, i.e., the high-voltage distribution box contains multiple relays. The number of relays is usually even and not less than two, with two being a main positive relay and a main negative relay, used to control the positive and negative terminals of the battery pack output. Some battery pack designs use a single circuit for charging (input) and discharging (output) within the battery pack. In this case, a relay is connected in series with both the main positive and main negative relays for fast charging of the battery pack. Since multiple relays are in a single conductive circuit, they are electrically connected. Of course, when some relays are on, others need to be off to ensure normal operation of the battery pack. For example, the main positive and main negative relays are an interlocked pair of relays, their function being to ensure that current flows in only one direction in the high-voltage circuit. The main positive relay controls the circuit's closure, allowing current to flow from the power source to the load, while the main negative relay controls the circuit's opening, preventing current from flowing to the load. When the main positive relay is closed, the main negative relay automatically opens, preventing reverse current flow. Conversely, when the main negative relay is closed, the main positive relay will automatically open, preventing current from flowing to the load. Through this interlocking mechanism, the main positive and main negative relays can work together to ensure the normal operation and safety of the high-voltage circuit.

[0071] It should be noted that each first terminal 221 of the first electrical component 22 is connected to the corresponding first connector 23, which is used to extend the inverted first terminal 221 outward, thereby realizing the conductive connection between the first terminal 221 and the external circuit.

[0072] As shown in Figure 7, in some embodiments, the housing 21 has a plurality of first through holes 212, and each second segment 232 is disposed within a corresponding first through hole 212. Specifically, it can be understood that one second segment 232 is disposed within one first through hole 212.

[0073] In the application embodiment, the provision of multiple first through holes 212 is used to separate multiple second segments 232, and to facilitate the fixing and support of multiple first connectors 23, as well as the fixing of multiple first electrical components 22.

[0074] As shown in Figure 1, in some embodiments, the battery pack further includes a housing 6 and a cover 7. The housing 6 has an accommodating space 61, and the cover 7 is connected to the housing 6 and covers the accommodating space 61. The battery cell 5, the thermal management component 1, and the power distribution component 2 are all disposed in the accommodating space 61, and the thermal management component 1 is disposed on the side of the battery cell 5 and the power distribution component 2 away from the cover 7.

[0075] In this embodiment, the thermal management component 1 is disposed on the side of the battery cell 5 and the power distribution assembly 2 away from the cover 7. At this time, the thermal management component 1 is disposed at the bottom of the housing 6, and the battery cell 5 and the power distribution assembly 2 are simultaneously heated from the bottom, which simplifies the structural layout and improves the heat exchange effect.

[0076] Referring to Figures 5 and 7-9, in some embodiments, the battery pack includes an insulating layer 3. The insulating layer 3 is disposed on the side of the second segment 232 and the second heat-conducting component 26 facing the thermal management component 1. The insulating layer 3 is connected to the second segment 232, the second heat-conducting component 26 and the thermal management component 1 respectively.

[0077] In this embodiment of the application, by setting an insulating layer 3 to isolate the thermal management component 1 from the second segment 232, as well as the thermal management component 1 and the second heat-conducting component, the risk of leakage and short circuit is effectively avoided, thereby improving the safety of the battery pack.

[0078] Referring to Figures 5 and 9-11, in some embodiments, the battery pack further includes a first thermally conductive component 4, which is disposed between the insulating layer 3 and the thermal management component 1, and is connected to the insulating layer 3 and the thermal management component 1 respectively.

[0079] In this embodiment, a first heat-conducting component 4 is provided between the insulating layer 3 and the thermal management component 1, filling the gap between the insulating layer 3 and the thermal management component 1, thereby enhancing the heat exchange and heat dissipation effect.

[0080] In some embodiments, the first thermally conductive component 4 is a flexible insulating component.

[0081] In this embodiment, the first heat-conducting component 4 is an insulating component, thereby further strengthening the insulation between the thermal management component 1 and the second segment 232, and between the thermal management component 1 and the second heat-conducting component 26, thus further improving safety. Furthermore, the first heat-conducting component 4 is a flexible component, which can fill the gaps between the second segment 232 and the thermal management component 1, and between the second heat-conducting component 26 and the thermal management component 1, absorbing the gaps and achieving a more effective fit between the second heat-conducting component 26, the thermal management component 1, and the insulating layer 3. This further improves the heat exchange effect and reduces vibration and noise between the power distribution component 2 and the thermal management component 1 after assembly in the housing 6, while also protecting the insulating layer 3 from damage.

[0082] Accordingly, an electrical device according to an embodiment of this application includes a battery pack as described in any of the foregoing embodiments.

[0083] In the embodiments of this application, the power device includes the aforementioned battery pack, wherein the aforementioned battery pack is used to supply power to the power device. Therefore, the power device includes all the technical features and technical effects of the aforementioned battery pack, which will not be repeated here.

[0084] Of course, the electrical devices referred to in this application can be vehicles, mobile phones, portable devices, laptops, ships, spacecraft, electric toys, and power tools, etc. Vehicles can be new energy vehicles, including pure electric vehicles, hybrid electric vehicles, or range-extended electric vehicles; spacecraft include airplanes, rockets, space shuttles, and spacecraft; electric toys include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys; power tools include metal cutting power tools, grinding power tools, assembly power tools, and railway power tools, such as electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete vibrators, and electric planers. This application does not impose any special limitations on the above-mentioned electrical devices.

[0085] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0086] The battery pack and power device provided in the embodiments of this application have been described in detail above, and specific examples have been used to illustrate the principles and implementation methods of this application. The description of the above embodiments is only for the purpose of helping to understand the technical solutions and core ideas of this application. Those skilled in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or make equivalent substitutions for some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A battery pack, wherein, include: Battery cell; A thermal management component is connected to one side of the battery cell; A power distribution assembly, electrically connected to the battery cell, wherein the power distribution assembly and the battery cell are disposed on the same side of the thermal management component; the power distribution assembly includes: The housing has a receiving cavity and a first through hole, the first through hole penetrating through the housing on the side facing the thermal management component and communicating with the receiving cavity; A first electrical component is disposed in the receiving cavity and connected to the housing. The first electrical component includes a first terminal, which is disposed toward the thermal management component, and at least a portion of the first terminal is exposed from the first through hole. The first connector includes a first segment and a second segment connected to the first segment. The first segment is disposed in the receiving cavity and detachably connected to the housing. The second segment is disposed on the side of the first terminal facing the thermal management component and is electrically connected to the first terminal. The second segment passes through the first through hole and is connected to the thermal management component on the side of the second segment away from the first terminal.

2. The battery pack of claim 1, wherein, The housing has a second through hole and a third through hole, both of which communicate with the receiving cavity; the power distribution assembly further includes: A second electrical component is disposed in the receiving cavity and connected to the housing. A portion of the second electrical component passes through the third through hole and is connected to the thermal management component. The second electrical component includes a second terminal and a third terminal, and the second terminal is electrically connected to the first terminal through the first connector. A second connector is disposed in the receiving cavity and connected to the housing. At least a portion of the second connector is disposed on the side of the third terminal away from the thermal management component. The second connector is electrically connected to the third terminal. A second heat-conducting component is disposed in the receiving cavity and connected to the housing. The second heat-conducting component is connected to the side of the third terminal away from the second connector. The second heat-conducting component passes through the second through hole and is connected to the thermal management component.

3. The battery pack of claim 2, wherein, The second electrical component includes a second body, which is connected to the second terminal and the third terminal respectively, and the second heat-conducting component is spaced apart from the second body.

4. The battery pack of claim 2, wherein, The second heat-conducting component has a groove, which is disposed on the side of the second heat-conducting component facing the third terminal, and the third terminal is disposed in the groove and connected to the second heat-conducting component.

5. The battery pack of claim 1, wherein, The second segment is welded to the first terminal.

6. The battery pack of claim 5, wherein, The outer surface of the first connector is provided with an anti-corrosion layer, which is at least one of a tin layer and a silver layer.

7. The battery pack of claim 1, wherein, The power distribution assembly includes a plurality of first electrical components and a plurality of first connectors. The plurality of first electrical components are electrically connected. Each first electrical component includes a plurality of first terminals. Each first terminal is connected to a corresponding second segment. The plurality of second segments are disposed in the first through hole and connected to the thermal management component.

8. The battery pack of claim 7, wherein, The housing has a plurality of first through holes, and each second segment is disposed within the corresponding first through hole.

9. The battery pack of claim 1, wherein, Also includes: The enclosure has storage space; A cover, connected to the box body and sealing the accommodating space; The battery cell, the thermal management component, and the power distribution assembly are all disposed in the accommodating space, with the thermal management component disposed on the side of the battery cell and the power distribution assembly away from the cover.

10. The battery pack of claim 2, wherein, The battery pack includes an insulating layer disposed on the side of the second section and the second thermally conductive component facing the thermal management component, and the insulating layer is connected to the second section, the second thermally conductive component and the thermal management component respectively.

11. The battery pack of claim 10, wherein, The battery pack further includes a first thermally conductive component, which is disposed between the insulating layer and the thermal management component, and is connected to both the insulating layer and the thermal management component.

12. The battery pack of claim 11, wherein, The first heat-conducting component is a flexible insulating component.

13. The battery pack of claim 1, wherein, The thermal management component is a liquid cooling plate.

14. The battery pack of claim 1, wherein, The power distribution assembly is a high-voltage distribution box; and / or, the first electrical component is a relay; and / or, the second electrical component is a fuse.

15. An electrical device, comprising: Includes the battery pack as described in any one of claims 1-14.

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