Battery device and electric device

Abstract

Provided in the present application are a battery device and an electric device, belonging to the technical field of batteries. The battery device comprises a battery cell, a fixing member, and a temperature sampling assembly. The fixing member is disposed on one side of the battery cell in a first direction. The temperature sampling assembly comprises a mounting frame and a temperature measurement member. The mounting frame is connected to the fixing member, the temperature measurement member is disposed on the mounting frame, and the temperature measurement member is configured to measure the temperature of the battery cell. The temperature sampling assembly further comprises an abutting member, the abutting member is connected to the mounting frame, the abutting member is located on the side of the mounting frame facing the battery cell and abuts against the battery cell, and the abutting member has a greater compression rebound rate than the mounting frame. The abutting member can better absorb the assembly tolerance or assembly error between the mounting frame and the battery cell, which helps to improve the effect that the mounting frame abuts against the battery cell by means of the abutting member, so as to improve the accuracy of the temperature measurement member in terms of measuring the temperature of the battery cell.

Description

Battery devices and electrical appliances Technical Field

[0001] This application relates to the field of battery technology, and more specifically, to a battery device and an electrical device. Background Technology

[0002] In recent years, new energy vehicles have experienced rapid development. In the field of electric vehicles, power batteries, as the power source, play an irreplaceable and crucial role. With the vigorous promotion of new energy vehicles, the demand for power battery products is also increasing. Among them, battery devices, as core components of new energy vehicles, have high requirements in terms of stability and reliability in use.

[0003] In battery technology, to ensure the safety of battery devices, temperature sampling components are generally installed inside the battery device. These components can collect and monitor the temperature of the individual battery cells during use, so as to obtain information about the battery device's performance. However, existing temperature sampling components in battery devices are prone to inaccurate temperature readings during use, which makes it difficult to effectively obtain information about the performance of the individual battery cells inside the battery device, thus hindering the improvement of the battery device's stability and reliability.

[0004] Summary of the Invention

[0005] This application provides a battery device and an electrical device that can effectively improve the stability and reliability of the battery device.

[0006] In a first aspect, embodiments of this application provide a battery device, including a battery cell, a fixing member, and a temperature sampling assembly; the fixing member is disposed on one side of the battery cell in a first direction; the temperature sampling assembly includes a mounting bracket and a temperature detection element, the mounting bracket is connected to the fixing member, the temperature detection element is disposed on the mounting bracket, and the temperature detection element is configured to detect the temperature of the battery cell; wherein, the temperature sampling assembly further includes an abutment member, the abutment member is connected to the mounting bracket, and along the first direction, the abutment member is located on the side of the mounting bracket facing the battery cell and abuts against the battery cell, the compression rebound rate of the abutment member is greater than the compression rebound rate of the mounting bracket.

[0007] In the above technical solution, a temperature sampling component is installed on the fixing part of the battery device. The temperature sampling component is provided with a mounting bracket, a temperature detection component, and an abutment component. The mounting bracket is connected to the fixing part. By setting the temperature detection component on the mounting bracket and connecting the abutment component to the side of the mounting bracket facing the battery cell in the first direction and abutting against the battery cell, the mounting bracket is structured to abut against the battery cell in the first direction through the abutment component. This allows the temperature detection component of the temperature sampling component to detect the temperature of the battery cell and obtain the temperature information of the battery cell during use. The compression rebound rate of the abutment component is set to be greater than that of the mounting bracket, so that the abutment component has a higher compression rebound rate than the mounting bracket. The good flexibility and elasticity allow the abutment to effectively absorb assembly tolerances or errors between the mounting bracket and the battery cell when the mounting bracket abuts against the battery cell in the first direction. This reduces the assembly gap between the abutment and the battery cell, thereby improving the effect of the mounting bracket abutting against the battery cell and enhancing the assembly quality between the temperature sampling component and the battery cell. Consequently, it effectively improves the accuracy and precision of the temperature detection component in detecting the temperature of the battery cell, enabling the temperature sampling component to better obtain the actual usage status of the battery cells inside the battery device. This is beneficial for improving the stability and reliability of the battery device.

[0008] In some embodiments, the compression rebound rate P of the abutment member satisfies 8% ≤ P ≤ 30%.

[0009] In the above technical solution, by setting the compression rebound rate of the abutment to 8% to 30%, the abutment has good flexibility and elasticity, while also reducing the manufacturing difficulty and material requirements of the abutment. This can improve the abutment's ability to absorb assembly tolerances or assembly errors between the mounting frame and the battery cell, and reduce the manufacturing cost of the battery device.

[0010] In some embodiments, the thermal conductivity of the abutment is K1, which satisfies 1W / mk≤K1≤4W / mk.

[0011] In the above technical solution, by setting the thermal conductivity of the contact component to 1W / mk to 4W / mk, the contact component can also have good thermal conductivity. This allows the contact component to better transfer the temperature of the battery cell to the mounting bracket, thereby further improving the accuracy and precision of the temperature detection component in detecting the temperature of the battery cell.

[0012] In some embodiments, the mounting bracket is provided with an assembly cavity. Along the first direction, the assembly cavity forms a first opening on the surface of the mounting bracket facing the abutment. The abutment has a first snap-fit ​​portion protruding on the side facing the mounting bracket, and the first snap-fit ​​portion snaps into the assembly cavity.

[0013] In the above technical solution, by setting an assembly cavity on the mounting bracket, and forming a first opening on the surface of the mounting bracket facing the abutment, and having a first snap-fit ​​part protruding and snapping into the assembly cavity on the side of the abutment facing the mounting bracket, the connection stability and reliability between the mounting bracket and the abutment can be improved, thereby reducing the phenomenon of the abutment falling off from the mounting bracket and the battery cell during use. This is beneficial to improving the stability of the mounting bracket abutting against the battery cell through the abutment. On the other hand, it can increase the contact area between the mounting bracket and the abutment, which is beneficial to improving the effect of the abutment transferring the temperature of the battery cell to the mounting bracket, thereby further improving the accuracy and precision of the temperature detection device in detecting the temperature of the battery cell.

[0014] In some embodiments, along the first direction, the mounting bracket has a first surface facing the abutment, the first opening is formed on the first surface, the abutment has a second surface facing the mounting bracket, and the first snap-fit ​​portion protrudes from the second surface; wherein the first surface and the second surface are in contact with each other.

[0015] In the above technical solution, by setting the first surface of the mounting bracket with the first opening and the second surface of the abutment with the first snap-fit ​​portion to fit together, the assembly gap between the mounting bracket and the abutment can be reduced, and the contact area between the mounting bracket and the abutment can be further increased. This is beneficial to further improve the effect of the abutment in transferring the temperature of the battery cell to the mounting bracket, so as to further improve the accuracy and precision of the temperature detection device in detecting the temperature of the battery cell.

[0016] In some embodiments, the assembly cavity includes a first cavity and a second cavity that are interconnected, the first cavity and the second cavity being arranged along the first direction, and the first cavity being located on the side of the second cavity facing the abutment. The first cavity forms the first opening on the surface of the mounting bracket facing the abutment. The first latching portion includes a first latching segment and a second latching segment that are interconnected, and the first latching segment and the second latching segment being arranged along the first direction. The first latching segment is connected to the surface of the abutment facing the mounting bracket. At least a portion of the first latching segment is located within the first cavity, and at least a portion of the second latching segment is located within the second cavity. In the same plane perpendicular to the first direction, the area of ​​the orthographic projection of the first latching segment is smaller than the area of ​​the orthographic projection of the second latching segment.

[0017] In the above technical solution, by setting the assembly cavity as a first cavity and a second cavity arranged along the first direction and interconnected with each other, and correspondingly setting the first snap-fit ​​part as a first snap-fit ​​segment and a second snap-fit ​​segment arranged along the first direction and interconnected with each other, the first snap-fit ​​segment and the second snap-fit ​​segment are respectively located in the first cavity and the second cavity, and in the same plane perpendicular to the first direction, the area of ​​the orthographic projection of the first snap-fit ​​segment is smaller than the area of ​​the orthographic projection of the second snap-fit ​​segment, so that the first snap-fit ​​part can be better snapped into the assembly cavity, which is conducive to improving the snap-fit ​​effect between the first snap-fit ​​part and the assembly cavity, thereby further improving the connection stability and reliability between the mounting bracket and the abutment, so as to reduce the risk of the abutment falling off from the mounting bracket and the battery cell during use.

[0018] In some embodiments, the projection of the second snap-fit ​​segment covers the second cavity along the first direction.

[0019] In the above technical solution, by setting the second snap-fit ​​segment of the first snap-fit ​​part to cover the second cavity in the first direction, the size of the projection of the second snap-fit ​​segment in the first direction is larger than the second opening, so that the cavity wall surface of the second snap-fit ​​segment and the second cavity can abut and play a role in restricting the first snap-fit ​​part from leaving the assembly cavity, thereby further improving the connection stability and reliability between the mounting bracket and the abutment, and further reducing the risk of the abutment falling off between the mounting bracket and the battery cell during use.

[0020] In some embodiments, the second cavity has a second opening formed on the outer surface of the mounting bracket.

[0021] In the above technical solution, by setting the second cavity to penetrate the outer surface of the mounting bracket and form a second opening, it is convenient to process and manufacture the second cavity, which helps to reduce the molding difficulty of the second cavity and thus reduce the manufacturing difficulty of the mounting bracket. On the other hand, it is convenient to assemble the second snap-fit ​​section into the second cavity, which helps to reduce the assembly difficulty between the mounting bracket and the abutment.

[0022] In some embodiments, the second opening is formed on one side of the mounting bracket in a second direction, which is perpendicular to the first direction.

[0023] In the above technical solution, by setting the second opening formed on the outer surface of the second cavity on one side of the mounting bracket in the second direction, the second opening and the first opening are respectively formed on one side of the mounting bracket in different directions. This helps to reduce the interference between the first opening and the second opening, and can reduce the obstruction and interference of the abutment on the second opening, thereby further reducing the assembly difficulty between the mounting bracket and the abutment.

[0024] In some embodiments, there are multiple assembly cavities and multiple first snap-fit ​​portions, and each assembly cavity corresponds to one of the first snap-fit ​​portions.

[0025] In the above technical solution, by setting multiple assembly cavities on the mounting bracket and multiple first snap-fit ​​parts on the abutment, with each first snap-fit ​​part snapping into an assembly cavity, the connection stability and reliability between the mounting bracket and the abutment can be further improved, thereby further alleviating the phenomenon of the abutment falling off between the mounting bracket and the battery cell during use. On the other hand, the contact area between the mounting bracket and the abutment can be further increased, which is conducive to further improving the effect of the abutment transferring the temperature of the battery cell to the mounting bracket.

[0026] In some embodiments, along the first direction, the abutment has a second surface facing the mounting bracket, the second surface being provided with a first slot, and a portion of the mounting bracket is engaged within the first slot.

[0027] In the above technical solution, by providing a first slot on the second surface of the abutment facing the mounting bracket, and having a portion of the mounting bracket engaged in the first slot along the first direction, the connection stability and reliability between the mounting bracket and the abutment can be improved, reducing the phenomenon of the abutment falling off between the mounting bracket and the battery cell during use. This is beneficial to improving the stability of the mounting bracket abutting against the battery cell through the abutment. On the other hand, it can increase the contact area between the mounting bracket and the abutment, which is beneficial to improving the effect of the abutment transferring the temperature of the battery cell to the mounting bracket, thereby further improving the accuracy and precision of the temperature detection device in detecting the temperature of the battery cell.

[0028] In some embodiments, along the first direction, the mounting bracket has a first surface facing the abutment, the first surface being in contact with the bottom surface of the first slot.

[0029] In the above technical solution, by setting the first surface of the mounting bracket facing the abutment in the first direction and the bottom surface of the first slot of the first slot to fit together, the assembly gap between the mounting bracket and the abutment can be reduced, and the contact area between the mounting bracket and the abutment can be further increased. This is beneficial to further improve the effect of the abutment in transferring the temperature of the battery cell to the mounting bracket, so as to further improve the accuracy and precision of the temperature detection device in detecting the temperature of the battery cell.

[0030] In some embodiments, at least one of the two opposite sides of the first slot in the second direction is provided with a second snap-fit ​​portion, and the mounting bracket is provided with a second slot on the side of the second slot facing the second snap-fit ​​portion in the second direction, and the second snap-fit ​​portion is snapped into the second slot, wherein the second direction is perpendicular to the first direction.

[0031] In the above technical solution, by providing a second latching part on at least one of the two slot sides that are arranged opposite to each other in the second direction in the first slot, and the mounting bracket is correspondingly provided with a second slot for the second latching part to be latched into, the stability and reliability of the mounting bracket latching into the first slot can be improved, which is conducive to further improving the connection stability and reliability between the mounting bracket and the abutment, so as to reduce the phenomenon of the abutment falling off from the mounting bracket and the battery cell during use.

[0032] In some embodiments, along the first direction, the second latching portion is inclined toward the bottom surface of the first slot.

[0033] In the above technical solution, by setting the second snap-fit ​​part to be inclined towards the bottom surface of the first slot in the first direction, the second snap-fit ​​part protruding on the side of the first slot is a hook-like structure, which can further improve the stability and reliability of the mounting bracket snap-fit ​​into the first slot, and is conducive to further improving the connection stability and reliability between the mounting bracket and the abutment, so as to further alleviate the phenomenon of the abutment falling off from the mounting bracket and the battery cell during use.

[0034] In some embodiments, along the second direction, the two opposite sides of the first slot are provided with the second snap-fit ​​portion, and the two sides of the mounting bracket are provided with the second slot, and each second snap-fit ​​portion is snapped into one of the second slots.

[0035] In the above technical solution, by providing second engaging parts on both sides of the first slot that are arranged opposite to each other in the second direction, and by providing second slots on both sides of the mounting bracket in the second direction for the second engaging parts to engage, the stability and reliability of the mounting bracket engaging with the first slot can be further improved, thereby further improving the connection stability and reliability between the mounting bracket and the abutment, which helps to alleviate the phenomenon of the abutment falling off from the mounting bracket and the battery cell during use.

[0036] In some embodiments, the mounting bracket has an internal cavity with a third opening, and the temperature sensing element is accommodated in the cavity. The mounting bracket has the third opening at one end in a third direction, which is perpendicular to the first direction and the second direction. The first slot has a slot sidewall including a first slot sidewall located on the side of the mounting bracket with the third opening in the third direction. The first slot sidewall has a clearance groove corresponding to the position of the third opening. The clearance groove penetrates the first slot sidewall in the third direction and penetrates the second surface in the first direction.

[0037] In the above technical solution, an avoidance groove is provided at the position of the third opening on the first groove sidewall of the first slot, and the avoidance groove penetrates both sides of the first groove sidewall in the third direction and penetrates the second surface in the first direction, thereby reducing the obstruction and occlusion of the third opening of the mounting bracket by the first groove sidewall, so as to facilitate the assembly of the temperature detection component into the receiving cavity through the third opening.

[0038] In some embodiments, along the first direction, the cavity wall surface of the receiving cavity on the side near the abutment is flush with the bottom surface of the clearance groove.

[0039] In the above technical solution, by setting the cavity wall surface of the receiving cavity on the side close to the abutment in the first direction and the bottom surface of the relief groove to be flush and coplanar with each other, the relief groove can not only improve the relief effect of the relief groove on the third opening, but also cover the edge of the mounting bracket forming the third opening through the side wall of the first groove. This helps to reduce the risk of the mounting bracket scratching the temperature detection component or other components at the third opening, thereby improving the reliability of the temperature sampling component.

[0040] In some embodiments, the abutment is connected to the mounting bracket via a vulcanization molding process.

[0041] In the above technical solution, by setting the abutment to be connected to the mounting frame using a vulcanization molding process, the stability and reliability of the abutment to the mounting frame can be further improved. On the other hand, the assembly gap between the abutment and the mounting frame can be further reduced to improve the fit between the abutment and the mounting frame. This can further improve the effect of the abutment in transferring the temperature of the battery cell to the mounting frame, which is conducive to further improving the accuracy and precision of the temperature detection device in detecting the temperature of the battery cell.

[0042] In some embodiments, the battery cell includes a housing, an electrode assembly, and electrode terminals, wherein the electrode assembly is housed within the housing, the electrode terminals are disposed on the housing, and the electrode terminals are electrically connected to the electrode assembly; wherein the abutment abuts against the housing along the first direction.

[0043] In the above technical solution, the battery cell is provided with a shell and an electrode assembly housed in the shell and an electrode terminal disposed on the shell. By setting the abutment to abut against the shell of the battery cell in a first direction, it is beneficial to reduce the difficulty of assembling the mounting bracket with the battery cell through the abutment and to allow the temperature of the battery cell to be better transferred to the mounting bracket through the abutment, so that the temperature detection device can detect the temperature of the battery cell, which is beneficial to improve the accuracy and precision of the temperature detection device in detecting the temperature of the battery cell.

[0044] In some embodiments, the mounting bracket has an internal cavity with a third opening, and the temperature sensing element is housed within the cavity.

[0045] In the above technical solution, by setting a receiving cavity with a third opening inside the mounting frame, and housing the temperature detection component inside the receiving cavity, the temperature sampling component with this structure can, on the one hand, provide a certain degree of protection for the temperature detection component through the mounting frame, thereby reducing the occurrence of damage to the temperature detection component during use, and reducing the assembly difficulty between the temperature detection component and the mounting frame. On the other hand, it can also reduce the influence of other components on the temperature detection component, which is conducive to improving the accuracy and precision of the temperature detection component in detecting the temperature of the battery cell.

[0046] In some embodiments, the temperature sampling assembly further includes a sealant that fills the receiving cavity and covers the temperature sensing element.

[0047] In the above technical solution, the cavity of the mounting bracket is also filled with sealant, and the temperature sensing element is covered by the sealant. On the one hand, this can improve the stability and reliability of the temperature sensing element installed in the cavity, and further stabilize the temperature sensing element to alleviate the phenomenon of shaking or bumping of the temperature sensing element in the cavity. On the other hand, it can also seal the temperature sensing element to reduce the phenomenon of damage caused by moisture during use, thereby helping to extend the service life of the temperature sensing element.

[0048] In some embodiments, the sealant includes a first material layer and a second material layer, wherein the first material layer covers the outside of the temperature sensing element, and the second material layer covers the outside of the first material layer; wherein the thermal conductivity of the first material layer is greater than that of the second material layer, and the water absorption rate of the second material layer is less than that of the first material layer.

[0049] In the above technical solution, the sealant has a first material layer covering the outside of the temperature sensing element and a second material layer covering the outside of the first material layer, making the sealant a double-layer structure that sequentially covers the outside of the temperature sensing element. By setting the thermal conductivity of the first material layer to the same as that of the second material layer, and setting the water absorption rate of the second material layer to be less than that of the first material layer, the first material layer of the sealant has a better thermal conductivity, and the second material layer of the sealant has a better waterproof effect. Therefore, it is not necessary to make the entire sealant a structure with a good waterproof effect. Thus, while achieving a good sealing and waterproof effect, the thermal conductivity of the sealant can also be improved.

[0050] In some embodiments, the thermal conductivity of the first material layer is K2, which satisfies 0.4W / mk≤K2≤1W / mk.

[0051] In the above technical solution, by setting the thermal conductivity of the first material layer of the sealant to 0.4W / mk to 1W / mk, the first material layer has good thermal conductivity, so that the sealant can better transfer the temperature to the temperature detection device, which is beneficial to improving the accuracy and precision of the temperature detection device in detecting the temperature of the battery cell.

[0052] In some embodiments, the water absorption rate of the second material layer is Wm, which satisfies 0.05% ≤ Wm ≤ 0.5%.

[0053] In the above technical solution, by setting the water absorption rate of the second material layer of the sealant to 0.05% to 0.5%, the outer layer of the sealant has a better waterproof effect, which is conducive to improving the sealing effect of the sealant on the temperature detection component, thereby further reducing the risk of damage to the temperature detection component after moisture during use, and thus further improving the service life of the temperature detection component.

[0054] In some embodiments, the mounting bracket has the third opening at at least one end in a third direction, the third direction being perpendicular to the first direction.

[0055] In the above technical solution, by forming the third opening of the receiving cavity at one end of the mounting frame in the third direction, the interference between the third opening of the mounting frame for assembling the temperature detection element and the abutment is reduced, thereby facilitating the assembly of the temperature detection element into the receiving cavity and facilitating the connection of the abutment to the mounting frame.

[0056] In some embodiments, the receiving cavity extends through both ends of the mounting bracket in the third direction, so that the third opening is formed at both ends of the mounting bracket in the third direction.

[0057] In the above technical solution, by setting the receiving cavity as a structure that penetrates both ends of the mounting frame along the third direction, the receiving cavity can form a third opening at both ends of the mounting frame along the third direction. This facilitates the forming of the receiving cavity inside the mounting frame, which helps to reduce the manufacturing difficulty of the receiving cavity of the mounting frame. On the other hand, it facilitates the assembly of the temperature detection component into the receiving cavity, which helps to further reduce the assembly difficulty between the temperature detection component and the mounting frame.

[0058] In some embodiments, the temperature sampling assembly further includes a connector; one end of the connector extends into the receiving cavity and is electrically connected to the temperature sensing element, and the other end is located outside the receiving cavity and is used for electrical connection to the battery management system.

[0059] In the above technical solution, the temperature sampling component is also provided with a connector, one end of which extends into the receiving cavity and is connected to the temperature detection element, while the other end is located outside the receiving cavity and is used for electrical connection with the battery management system. This reduces the difficulty of electrical connection between the temperature detection element and the battery management system, and allows the connector and temperature detection element to be assembled together before being assembled into the battery device and electrically connected to the battery management system through the connector. This is beneficial for optimizing the production cycle of the battery device and improving the production efficiency of the battery device.

[0060] In some embodiments, the temperature sampling assembly further includes a connector for electrically connecting the temperature sensing element and the battery management system.

[0061] In the above technical solution, the temperature sampling component is also provided with a connector, which is used to electrically connect the temperature detection component and the battery management system to realize the electrical connection between the temperature detection component and the battery management system, thereby reducing the difficulty of the electrical connection between the temperature detection component and the battery management system and reducing the assembly difficulty of the battery device.

[0062] In some embodiments, the connector includes two connecting wires with opposite polarities, which are respectively connected to the positive and negative terminals of the temperature sensing element.

[0063] In the above technical solution, by setting the connector as two connecting lines with opposite polarities, and connecting the two connecting lines of the connector to the positive and negative terminals of the temperature detection device respectively, the electrical connection between the connector and the temperature detection device is realized. The structure is simple, easy to assemble, and the connector has good flexibility, so as to facilitate the layout and arrangement of the connector in the battery device.

[0064] In some embodiments, the connecting wire includes a conductor and an insulating shell; the conductor is electrically connected to the temperature sensing element; the insulating shell covers the outside of the conductor, and the insulating shells of two connecting wires are interconnected to form a weak structure at the connection point.

[0065] In the above technical solution, the connecting wires are provided with conductors and insulating shells covering the conductors. By connecting the insulating shells of the two connecting wires together and forming a weak structure at the connection point, it is convenient to organize and assemble the two connecting wires inside the battery device, which helps to improve the regularity of the two connecting wires and optimize their layout within the battery device. On the other hand, when the connecting wires are pulled during use, they can be separated from each other, so that one connecting wire has the ability to separate from the other when subjected to external force. This allows the weak structure between the insulating shells of the two connecting wires to buffer and absorb the external force on the connecting wires, thereby alleviating the phenomenon of rigid pulling on the connecting wires. This reduces the occurrence of breakage or connection failure during use, thereby reducing the risk of failure or damage to the temperature sampling component during use and improving the stability and service life of the temperature sampling component.

[0066] In some embodiments, a groove is defined between the insulating shells of the two connecting wires, and the bottom wall of the groove forms the weak structure.

[0067] In the above technical solution, by forming a groove between the insulating shells of the two connecting wires, the structural strength of the position where the insulating shells of the two connecting wires are connected is weakened, thereby making the bottom wall of the groove a weak structure between the two connecting wires. The structure is simple, easy to manufacture, and facilitates the separation of the two connecting wires when subjected to external force.

[0068] In some embodiments, the insulating shells of the two connecting wires are integrally formed.

[0069] In the above technical solution, by setting the insulating shells of the two connecting wires as an integrally formed structure, the connection position of the insulating shells of the two connecting wires forms a weak structure. The connector with this structure can reduce the molding difficulty of the weak structure between the insulating shells of the two connecting wires, and can improve the molding efficiency of the connector, which is conducive to improving the production efficiency of the connector.

[0070] In some embodiments, the connector is a circuit board, the connector includes a substrate, two terminals and two pads, two wires are disposed in the substrate, the two wires have opposite polarities, the two terminals and the two pads are disposed on the substrate, and each terminal is electrically connected to a pad through a wire, the two terminals are respectively connected to the positive and negative terminals of the temperature sensing device, and the two pads are used for electrical connection with the battery management system.

[0071] In the above technical solution, by setting the connector as a circuit board, the connector includes a substrate, two terminals and two pads. Each terminal is connected to a pad through a wire in the substrate. The two terminals are respectively connected to the positive and negative terminals of the temperature sensing element to realize the electrical connection between the connector and the temperature sensing element. The connector with this structure can reduce the assembly difficulty between the connector and the temperature sensing element, and can effectively realize the separation between the two terminals and the two pads, which helps to reduce the risk of short circuit in the temperature sampling component during use.

[0072] In some embodiments, two pads are spaced apart on the substrate.

[0073] In the above technical solution, by setting the two pads of the connector on the substrate at intervals, the separation effect between the two pads can be further improved, which helps to further reduce the risk of short circuit in the temperature sampling component during use.

[0074] In some embodiments, the substrate has a partition groove on one side in its thickness direction, and the partition groove extends through both sides of the substrate in the thickness direction; wherein, in the arrangement direction of the two pads, the partition groove is located between the two pads.

[0075] In the above technical solution, by setting a partition groove on both sides of the substrate in the thickness direction, and the partition groove is located between the two pads in the arrangement direction of the two pads, the physical separation between the two pads can be further realized, which is beneficial to further reduce the risk of short circuit in the use of the low-temperature sampling component.

[0076] In some embodiments, the mounting bracket is snapped into the fastener.

[0077] In the above technical solution, by setting the mounting bracket as a structure that snaps onto the fixing component, on the one hand, the assembly difficulty between the mounting bracket and the fixing component can be reduced, without the need to introduce other more complex structures or components to achieve the assembly between the mounting bracket and the fixing component, which is conducive to improving the assembly efficiency between the temperature sampling component and the fixing component. On the other hand, it can realize the detachable connection between the mounting bracket and the fixing component, which facilitates the maintenance or replacement of the temperature sampling component during later use, and helps to reduce the difficulty and cost of later maintenance of the temperature sampling component.

[0078] In some embodiments, the mounting bracket is provided with a third slot, and a portion of the fastener is engaged in the third slot.

[0079] In the above technical solution, by setting a third slot on the mounting bracket and having part of the fastener inserted into the third slot, the mounting bracket and the fastener are snapped together, which is simple in structure and easy to assemble.

[0080] In some embodiments, the mounting bracket is provided with the third slot on at least one side in a second direction, the second direction being perpendicular to the first direction.

[0081] In the above technical solution, by setting the third slot of the mounting bracket for interlocking with the fastener on at least one side of the mounting bracket in the second direction, the third slot of the mounting bracket for interlocking with the fastener and the abutment are respectively located on one side of the mounting bracket in different directions, thereby reducing the interference between the abutment and the fastener and reducing the difficulty of interlocking between the mounting bracket and the fastener.

[0082] In some embodiments, the battery device includes a busbar and a plurality of battery cells, the busbar being electrically connected to the plurality of battery cells; wherein the busbar is the fixing member.

[0083] In the above technical solution, the battery device is also provided with a current-combining component, which electrically connects multiple battery cells, and the mounting bracket of the temperature sampling component is mounted on the current-combining component. This allows the current-combining component to not only realize the electrical connection between multiple battery cells, but also provide assembly and fixation for the mounting bracket of the temperature sampling component. This eliminates the need to set up other components in the battery device to assemble and stabilize the mounting bracket, which is beneficial to optimizing the assembly process of the battery device and reducing the manufacturing cost of the battery device.

[0084] Secondly, embodiments of this application also provide an electrical device, including the battery device described above, wherein the battery device is used to provide electrical energy. Attached Figure Description

[0085] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0086] Figure 1 is a structural schematic diagram of a vehicle provided in some embodiments of this application;

[0087] Figure 2 is an exploded view of the structure of a battery device provided in some embodiments of this application;

[0088] Figure 3 is a schematic diagram of the assembly of a battery cell assembly and a sampling assembly provided in some embodiments of this application;

[0089] Figure 4 is a schematic diagram of the assembly of a battery cell and a busbar component provided in some embodiments of this application;

[0090] Figure 5 is a partial structural schematic diagram of a battery device provided in some embodiments of this application;

[0091] Figure 6 is a schematic diagram of the structure of a temperature sampling component provided in some embodiments of this application;

[0092] Figure 7 is an exploded view of the structure of a temperature sampling component provided in some embodiments of this application;

[0093] Figure 8 is an assembly diagram of the mounting bracket and abutment of the temperature sampling component provided in some embodiments of this application;

[0094] Figure 9 is a schematic diagram of the mounting bracket for the temperature sampling component provided in some embodiments of this application;

[0095] Figure 10 is a schematic diagram of the structure of the contact member of the temperature sampling component provided in some embodiments of this application;

[0096] Figure 11 is a schematic diagram of the structure of a temperature sampling component provided in some embodiments of this application;

[0097] Figure 12 is an exploded view of the structure of a temperature sampling component provided in some embodiments of this application;

[0098] Figure 13 is an assembly diagram of the mounting bracket and abutment of a temperature sampling component provided in some embodiments of this application;

[0099] Figure 14 is a cross-sectional view of the mounting bracket and abutment of the temperature sampling assembly provided in some embodiments of this application after they are assembled together;

[0100] Figure 15 is a schematic diagram of the mounting bracket for a temperature sampling component provided in some embodiments of this application;

[0101] Figure 16 is a schematic diagram of the structure of the contact member of the temperature sampling component provided in some embodiments of this application;

[0102] Figure 17 is a cross-sectional view of the connector of a temperature sampling assembly provided in some embodiments of this application.

[0103] Icons: 1000 - Vehicle; 100 - Battery Unit; 10 - Housing; 11 - First Housing Body; 12 - Second Housing Body; 20 - Battery Cell Assembly; 21 - Battery Cell; 211 - Electrode Terminal; 212 - Housing; 22 - Busbar Component; 30 - Sampling Assembly; 31 - Wiring Harness Assembly; 32 - Temperature Sampling Component; 321 - Mounting Bracket; 3211 - Assembly Cavity; 3211a - First Cavity; 3211b - Second Cavity; 3212 - First Opening; 3213 - First Surface; 3214 - Second Opening; 3215 - Second Slot; 3216 - Third Opening; 3217 - Receiving Cavity; 3218 - Third Slot; 322 - Temperature Detector; 323 - Abutment; 3231 - First Connecting Part ; 3231a-First snap-fit ​​section; 3231b-Second snap-fit ​​section; 3232-Second surface; 3233-First slot; 3234-Second snap-fit ​​part; 3235-First slot sidewall; 3236-Allowing slot; 324-Sealant; 3241-First material layer; 3242-Second material layer; 325-Connector; 3251-Connecting wire; 3251a-Conductor; 3251b-Insulating shell; 3251c-Weak structure; 3251d-Groove; 3252-Substrate; 3252a-Separation slot; 3253-Terminal; 3254-Pad; 40-Insulating component; 50-Fixing component; 200-Controller; 300-Motor; X-First direction; Y-Second direction; Z-Third direction. Detailed Implementation

[0104] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0105] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used in the description of this application is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms "comprising" and "having," and any variations thereof, in the description, claims, and accompanying drawings of this application are intended to cover non-exclusive inclusion. The terms "first," "second," etc., in the description, claims, or accompanying drawings of this application are used to distinguish different objects, not to describe a specific order or hierarchy.

[0106] In this application, the reference to "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment that is mutually exclusive with other embodiments.

[0107] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "attachment" 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 direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0108] In this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, in this application, the character " / " generally indicates that the preceding and following related objects have an "or" relationship.

[0109] In the embodiments of this application, the same reference numerals denote the same components, and for the sake of brevity, detailed descriptions of the same components are omitted in different embodiments. It should be understood that the thickness, length, width, and other dimensions of various components in the embodiments of this application shown in the accompanying drawings, as well as the overall thickness, length, width, and other dimensions of the integrated device, are merely illustrative and should not constitute any limitation on this application.

[0110] In this application, "multiple" means two or more (including two).

[0111] In this embodiment of the application, the battery cell can be a secondary battery, which refers to a battery cell that can be recharged to activate the active materials and continue to be used after the battery cell has been discharged.

[0112] The battery cell can be a lithium-ion battery, sodium-ion battery, sodium-lithium-ion battery, lithium metal battery, sodium metal battery, lithium-sulfur battery, magnesium-ion battery, nickel-metal hydride battery, nickel-cadmium battery, lead-acid battery, etc., and the embodiments of this application are not limited to this.

[0113] A single battery cell typically includes an electrode assembly. The electrode assembly includes a positive electrode, a negative electrode, and a separator. During the charging and discharging process of a single battery cell, active ions (such as lithium ions) repeatedly insert and extract between the positive and negative electrodes. The separator, positioned between the positive and negative electrodes, prevents short circuits while allowing active ions to pass through.

[0114] In some embodiments, the electrode assembly further includes an isolator disposed between the positive and negative electrodes.

[0115] In some embodiments, the separator is a separator membrane. The separator membrane can be of various types, and any known porous separator membrane with good chemical and mechanical stability can be selected.

[0116] As an example, the material of the separator may include at least one of glass fiber, nonwoven fabric, polyethylene, polypropylene, and polyvinylidene fluoride. The separator may be a single-layer film or a multi-layer composite film. When the separator is a multi-layer composite film, the materials of each layer may be the same or different. The separator may be a separate component located between the positive and negative electrodes, or it may be attached to the surfaces of the positive and negative electrodes.

[0117] In some embodiments, the separator is a solid electrolyte. The solid electrolyte is disposed between the positive and negative electrodes, serving both to transport ions and to isolate the positive and negative electrodes.

[0118] In some embodiments, the battery cell also includes an electrolyte, which acts as a conductor of ions between the positive and negative electrodes. The electrolyte can be liquid, gel-like, or solid. Liquid electrolytes include electrolyte salts and solvents.

[0119] In some implementations, the electrode assembly has a wound structure. The positive and negative electrode sheets are wound into a wound structure.

[0120] In some implementations, the electrode assembly has a stacked structure.

[0121] As an example, multiple positive and negative electrodes can be set, and multiple positive and multiple negative electrodes can be stacked alternately.

[0122] As an example, multiple positive electrode plates can be provided, and negative electrode plates can be folded to form multiple stacked folded segments, with a positive electrode plate sandwiched between adjacent folded segments.

[0123] As an example, both the positive and negative electrode plates are folded to form multiple stacked folded segments.

[0124] As an example, multiple separators can be provided, each positioned between any adjacent positive or negative electrode plates.

[0125] As an example, the separators can be continuously arranged, either by folding or rolling between any adjacent positive or negative electrode plates.

[0126] In some embodiments, the electrode assembly can be cylindrical, flat, or polygonal, etc.

[0127] In some embodiments, the electrode assembly is provided with tabs that allow current to be drawn from the electrode assembly. The tabs include a positive tab and a negative tab.

[0128] In some embodiments, the battery cell may include a housing. The housing is used to encapsulate components such as electrode assemblies and electrolytes. The housing may be made of steel, aluminum, plastic (such as polypropylene), composite metal (such as copper-aluminum composite), or aluminum-plastic film, etc.

[0129] As an example, a battery cell can be a cylindrical battery cell, a prismatic battery cell, a pouch battery cell, or a battery cell of other shapes. Prismatic battery cells include, but are not limited to, square battery cells, blade-shaped battery cells, and multi-prismatic batteries, such as hexagonal prismatic batteries.

[0130] The battery apparatus mentioned in the embodiments of this application may include one or more battery cell assemblies for providing voltage and capacity. A battery cell assembly may include multiple battery cells connected in series, parallel, or mixed connections via a busbar.

[0131] In some embodiments, a battery cell assembly is typically formed by arranging multiple battery cells; as an example, a battery cell assembly can be a battery module, which is formed by arranging and fixing multiple battery cells together to form a single module. As an example, a battery module can be formed by bundling multiple battery cells together with cable ties.

[0132] In some embodiments, the battery device may be a battery pack, which includes a housing and one or more individual battery cells housed within the housing.

[0133] As an example, the battery cell assembly can be a battery module, which can be housed in a housing by fixing the battery module in the housing.

[0134] As an example, battery cell assemblies can also be housed in a housing by directly fixing multiple battery cells to the housing.

[0135] As an example, the enclosure may include a first enclosure body and a second enclosure body. The first enclosure body and the second enclosure body are fastened together to form a closed space inside the enclosure to house the individual battery cells. Here, "closed" refers to covering or shutting down; it can be sealed or not sealed. The first enclosure body may be a top cover or a bottom plate.

[0136] As an example, the enclosure may include a top cover, a frame, and a bottom plate. The top cover and bottom plate are connected to the frame, creating an enclosed space inside the enclosure to house the individual battery cells.

[0137] As an example, the housing can be part of the vehicle's chassis structure. For instance, the housing's roof can be at least part of the vehicle's floor, or the housing's frame can be at least part of the vehicle's crossbeams and longitudinal beams.

[0138] In some embodiments, the battery device refers to an energy storage device, which includes a housing with a door on at least one side. Energy storage devices include energy storage containers, energy storage cabinets, etc.

[0139] Battery devices possess outstanding advantages such as high energy density, low environmental pollution, high power density, long service life, wide applicability, and low self-discharge coefficient, making them an important component of today's new energy development. The development of battery technology must simultaneously consider multiple design factors, such as performance parameters like energy density, cycle life, discharge capacity, and charge / discharge rate. Furthermore, the safety of the battery device must also be taken into account.

[0140] For a typical battery device, it includes a housing and multiple battery cells housed within the housing. These battery cells are electrically connected via a busbar to achieve series or parallel connection. In related technologies, to ensure the safety of the battery cells, a temperature sampling component is typically installed within the battery device. This component collects and monitors the temperature of the battery cells during use, thus providing information about the battery device's operating status. The temperature sampling component usually includes a circuit board, a temperature sensor, a mounting bracket for securing the circuit board, and a thermal pad between the battery cells and the temperature sensor. The temperature sensor is mounted on the circuit board, and the mounting bracket presses the circuit board firmly against the battery cell housing. The temperature sensor contacts the battery cell's casing via a thermal pad, enabling it to detect the cell's temperature. However, due to manufacturing deviations in the mounting bracket and thermal pad of the temperature sampling component, assembly tolerances exist during their assembly. This can prevent the mounting bracket from pressing the thermal pad firmly onto the battery cell, resulting in an assembly gap between the thermal pad and the battery cell. Consequently, poor contact between the thermal pad and the battery cell, or between the thermal pad and the temperature sensor, leads to inaccurate temperature readings. Consequently, the sensor cannot effectively obtain information about the battery cells' condition within the battery pack, hindering the improvement of the battery pack's stability and reliability.

[0141] Based on the above considerations, in order to address the problem of low stability and reliability in the use of battery devices, this application provides a battery device including a battery cell, a fixing member, and a temperature sampling assembly. The fixing member is disposed on one side of the battery cell in a first direction. The temperature sampling assembly includes a mounting bracket and a temperature detection element. The mounting bracket is connected to the fixing member, and the temperature detection element is disposed on the mounting bracket and configured to detect the temperature of the battery cell. The temperature sampling assembly also includes an abutment member connected to the mounting bracket. Along the first direction, the abutment member is located on the side of the mounting bracket facing the battery cell and abuts against the battery cell. The compression rebound rate of the abutment member is greater than the compression rebound rate of the mounting bracket.

[0142] In this battery device structure, a temperature sampling component is mounted on the fixing member of the battery device. The temperature sampling component includes a mounting bracket, a temperature detection element, and an abutment element. The mounting bracket is connected to the fixing member. By placing the temperature detection element on the mounting bracket and connecting the abutment element to the side of the mounting bracket facing the battery cell in a first direction and abutting against the battery cell, the mounting bracket is structured to abut against the battery cell in the first direction via the abutment element. This allows the temperature detection element of the temperature sampling component to detect the temperature of the battery cell and obtain temperature information of the battery cell during use. The compression rebound rate of the abutment element is set to be greater than that of the mounting bracket, so that the abutment element has a certain compression rebound rate relative to the mounting bracket. The improved flexibility and elasticity allow the abutment to better absorb assembly tolerances or errors between the mounting bracket and the battery cell when the mounting bracket abuts against the battery cell in the first direction. This reduces the assembly gap between the abutment and the battery cell, thereby improving the effectiveness of the mounting bracket abutting against the battery cell and enhancing the assembly quality between the temperature sampling component and the battery cell. Consequently, this effectively improves the accuracy and precision of the temperature detection component in detecting the temperature of the battery cell, enabling the temperature sampling component to better obtain the actual usage status of the battery cells inside the battery device. This contributes to improving the stability and reliability of the battery device.

[0143] The battery device disclosed in this application can be used, but is not limited to, in electrical devices such as vehicles, ships, or aircraft. A power system comprising such an electrical device can be constructed using the battery device disclosed in this application. This helps to alleviate the problem of inaccurate temperature detection results of individual battery cells by the temperature sampling component, thereby improving the stability and reliability of the battery device.

[0144] This application provides an electrical device that uses a battery as a power source. The electrical device can be, but is not limited to, mobile phones, tablets, laptops, electric toys, power tools, electric vehicles, electric cars, ships, spacecraft, etc. Electric toys can include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc. Spacecraft can include airplanes, rockets, space shuttles, and spacecraft, etc.

[0145] For ease of explanation, the following embodiments will be described using a vehicle as an example of an electrical device according to an embodiment of this application.

[0146] Please refer to Figure 1, which is a structural schematic diagram of a vehicle 1000 provided in some embodiments of this application. The vehicle 1000 can be a gasoline-powered vehicle, a natural gas-powered vehicle, or a new energy vehicle. New energy vehicles can be pure electric vehicles, hybrid electric vehicles, or range-extended electric vehicles, etc. A battery device 100 is installed inside the vehicle 1000. The battery device 100 can be located at the bottom, front, or rear of the vehicle 1000. The battery device 100 can be used to power the vehicle 1000; for example, it can serve as the vehicle's operating power source or general power source. The vehicle 1000 may also include a controller 200 and a motor 300. The controller 200 controls the battery device 100 to supply power to the motor 300, for example, to meet the power needs of the vehicle 1000 during startup, navigation, and driving.

[0147] In some embodiments of this application, the battery device 100 can not only serve as the operating power or power source for the vehicle 1000, but also as the driving power source for the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000.

[0148] Please refer to Figures 2 and 3. Figure 2 is an exploded view of the structure of a battery device 100 provided in some embodiments of this application, and Figure 3 is an assembly diagram of a battery cell assembly 20 and a sampling assembly 30 provided in some embodiments of this application. The battery device 100 includes a housing 10 and at least one battery cell assembly 20. The battery cell assembly 20 is housed within the housing 10 and includes a plurality of battery cells 21 stacked along a second direction Y.

[0149] The housing 10 provides assembly space for the battery cell assembly 20, and the housing 10 can adopt various structures. In some embodiments, the housing 10 may include a first housing body 11 and a second housing body 12, which overlap each other along a first direction X, and together define an assembly space for accommodating the battery cell assembly 20. The second housing body 12 may be a hollow structure open at one end, and the first housing body 11 may be a plate-like structure, with the first housing body 11 covering the open side of the second housing body 12 so that the first housing body 11 and the second housing body 12 together define the assembly space; alternatively, the first housing body 11 and the second housing body 12 may both be hollow structures open on one side, with the open side of the first housing body 11 covering the open side of the second housing body 12.

[0150] Of course, the box 10 formed by the first box body 11 and the second box body 12 can be of various shapes, such as a cylinder, a cuboid, or a cube. For example, in Figure 2, the shape of the box 10 is a cuboid.

[0151] Optionally, in the battery device 100, the battery cell assembly 20 housed within the housing 10 can be one or more. When multiple battery cell assemblies 20 are housed within the housing 10, they can be connected in series, parallel, or a combination thereof. A combination thereof means that multiple battery cell assemblies 20 can be connected in both series and parallel. Multiple battery cell assemblies 20 can be directly connected in series, parallel, or a combination thereof, and then the entire assembly of the multiple battery cell assemblies 20 is housed within the housing 10.

[0152] For example, as shown in Figures 2 and 3, the battery device 100 includes two battery cell assemblies 20, which are arranged along the third direction Z and connected in series.

[0153] In Figure 3, each battery cell assembly 20 includes a busbar 22 and a plurality of battery cells 21 stacked along the second direction Y. The busbar 22 is located on one side of the plurality of battery cells 21 in the first direction X. The busbar 22 is used to connect the plurality of battery cells 21 to achieve electrical connection between the plurality of battery cells 21. Exemplarily, the first direction X, the second direction Y, and the third direction Z are perpendicular to each other. The first direction X is the height direction of the battery cell 21, the second direction Y is the thickness direction of the battery cell 21, and the third direction Z is the length direction of the battery cell 21.

[0154] Referring to Figure 3, and further referring to Figure 4, Figure 4 is a schematic diagram of the assembly of a battery cell 21 and a busbar 22 according to some embodiments of this application. The battery cell 21 has two electrode terminals 211 at one end in the first direction X. The two electrode terminals 211 have opposite polarities and are used to input or output electrical energy from the battery cell 21. The busbar 22 is connected to the electrode terminals 211 of the battery cell 21 to electrically connect multiple battery cells 21. It should be noted that the multiple battery cells 21 in the battery cell assembly 20 can be connected in series or in parallel. For example, in Figure 3, the multiple battery cells 21 in the battery cell assembly 20 are connected in series via multiple busbars 22.

[0155] Optionally, each battery cell 21 can be a secondary battery or a primary battery; it can also be a lithium-sulfur battery, a sodium-ion battery, or a magnesium-ion battery, but is not limited to these. The battery cell 21 can be in the form of a cuboid, cylinder, prism, or other shapes. For example, in Figures 2 and 3, the battery cell 21 has a cuboid structure.

[0156] In some embodiments, as shown in Figures 2 and 3, the battery device 100 may further include a sampling assembly 30 disposed within the housing 10. The sampling assembly 30 is used for electrical connection with the battery management system of the battery device 100. The sampling assembly 30 includes a wiring harness assembly 31 and a temperature sampling assembly 32. The temperature sampling assembly 32 is configured to detect the temperature of the battery cell 21. The wiring harness assembly 31 is used for electrical connection with the battery management system. The temperature sampling assembly 32 is electrically connected to the wiring harness assembly 31 to enable the temperature sampling assembly 32 to be electrically connected to the battery management system through the wiring harness assembly 31.

[0157] The sampling assembly 30 is set up in a one-to-one correspondence with the battery cell assembly 20, and each battery cell assembly 20 is set up with a sampling assembly 30.

[0158] For example, the sampling assembly 30 is located on the side of the battery cell assembly 20 where the busbar 22 is disposed in the first direction X.

[0159] In some embodiments, as shown in Figures 2 and 3, the battery device 100 may further include an insulating member 40 disposed in the first direction X between the sampling assembly 30 and the plurality of battery cells 21 to insulate and isolate the sampling assembly 30 and the battery cells 21, thereby reducing the risk of overlap between the sampling assembly 30 and the battery cells 21, thereby mitigating the phenomenon of internal short circuits in the battery device 100 during use and improving the reliability of the battery device 100.

[0160] Among them, the insulating component 40 serves to insulate and isolate the battery cell 21 and the sampling assembly 30. The insulating component 40 can be made of various materials, such as rubber, silicone or plastic.

[0161] For example, the busbar component 22 is disposed on the side of the insulator 40 away from the battery cell 21, such that the busbar component 22 and the sampling assembly 30 are both located on the side of the insulator 40 away from the battery cell 21 in the first direction X. Correspondingly, the insulator 40 is provided with a first clearance hole (not shown in the figure), which extends through both sides of the insulator 40 along the first direction X. Each first clearance hole is used for one electrode terminal 211 of a battery cell 21 to pass through, so that the electrode terminal 211 can be connected to the busbar component 22.

[0162] According to some embodiments of this application, referring to Figures 3 and 4, and further referring to Figures 5, 6, 7, and 8, Figure 5 is a partial structural schematic diagram of a battery device 100 provided in some embodiments of this application, Figure 6 is a structural schematic diagram of a temperature sampling component 32 provided in some embodiments of this application, Figure 7 is an exploded view of the structure of the temperature sampling component 32 provided in some embodiments of this application, and Figure 8 is an assembly schematic diagram of the mounting bracket 321 and the abutment member 323 of the temperature sampling component 32 provided in some embodiments of this application. This application provides a battery device 100, which includes a battery cell 21, a fixing member 50, and a temperature sampling component 32. The fixing member 50 is disposed on one side of the battery cell 21 in a first direction X. The temperature sampling component 32 includes a mounting bracket 321 and a temperature detection member 322. The mounting bracket 321 is connected to the fixing member 50, and the temperature detection member 322 is disposed on the mounting bracket 321 and configured to detect the temperature of the battery cell 21. The temperature sampling component 32 also includes an abutment 323, which is connected to the mounting frame 321. Along the first direction X, the abutment 323 is located on the side of the mounting frame 321 facing the battery cell 21 and abuts against the battery cell 21. The compression rebound rate of the abutment 323 is greater than that of the mounting frame 321.

[0163] The temperature sampling component 32 includes a mounting bracket 321 and a temperature detection element 322. The temperature detection element 322 detects the temperature of the battery cell 21. The temperature detection element 322 is electrically connected to the battery management system via a wiring harness assembly 31, thereby enabling the monitoring and acquisition of temperature information of the battery cell 21 during use. The temperature detection element 322 is mounted on the mounting bracket 321, which is connected to the fixing member 50, so that the mounting bracket 321 serves to assemble and fix the temperature detection element 322.

[0164] Optionally, the fastener 50 can have various structures. For example, the fastener 50 can be a busbar 22 connected to one side of the battery cell 21 in the first direction X, a crossbeam of the housing 10 located on one side of the battery cell 21 in the first direction X, or other components connected to one side of the battery cell 21 in the first direction X. For example, in Figures 3 and 5, the fastener 50 is the busbar 22, and correspondingly, the mounting bracket 321 is connected to the busbar 22.

[0165] For example, the structure of the temperature sensing element 322 can be various, such as an epoxy thermistor or a glass-sealed thermistor.

[0166] In this embodiment, the temperature sampling component 32 further includes an abutment 323, which is connected to the mounting frame 321. Optionally, the connection structure between the abutment 323 and the mounting frame 321 can be various, such as snap-fit, adhesive, or bolt connection. For example, the abutment 323 is a structure connected to the mounting frame 321 by a vulcanization molding process. The specific molding method of the vulcanization molding process can be found in related technologies, which will not be described in detail here.

[0167] Along the first direction X, the abutment 323 is located on the side of the mounting bracket 321 facing the battery cell 21 and abuts against the battery cell 21. That is, at least a portion of the abutment 323 is located between the mounting bracket 321 and the battery cell 21 in the first direction X, and the mounting bracket 321 abuts against the battery cell 21 along the first direction X via the abutment 323.

[0168] For example, as shown in Figures 4 and 8, the battery cell 21 includes a housing 212, an electrode assembly (not shown in the figures), and two electrode terminals 211 with opposite polarities. The electrode assembly is housed within the housing 212, and both electrode terminals 211 are disposed on the housing 212 and electrically connected to the electrode assembly. The electrode terminals 211 are also connected to the busbar component 22. Correspondingly, the mounting bracket 321 abuts against the housing 212 of the battery cell 21 along the first direction X via the abutment member 323.

[0169] The compression rebound rate of the abutment 323 is greater than that of the mounting bracket 321. That is, the ability of the abutment 323 to recover after being compressed is greater than that of the mounting bracket 321 after being compressed, which makes the flexibility and elasticity of the abutment 323 higher than that of the mounting bracket 321.

[0170] For example, the abutment 323 can be made of various materials, such as silicone rubber or silicone grease. Similarly, the mounting bracket 321 can also be made of various materials, such as polyphenylene sulfide or polyhexamethylene terephthalamide.

[0171] It should be noted that in the embodiment where the battery device 100 is further provided with an insulating member 40, and the insulating member 40 is disposed between the sampling assembly 30 and the plurality of battery cells 21 in the first direction X, the insulating member 40 is provided with a second clearance hole (not shown in the figure) at the position corresponding to the abutment member 323 in the first direction X. The second clearance hole passes through both sides of the insulating member 40 along the first direction X, so that the insulating member 40 can avoid the mounting bracket 321 and the abutment member 323, so that the mounting bracket 321 can abut against the battery cell 21 through the abutment member 323.

[0172] In this embodiment, a temperature sampling component 32 is mounted on the fixing member 50 of the battery device 100. The temperature sampling component 32 is provided with a mounting frame 321, a temperature detection element 322, and an abutment element 323. The mounting frame 321 is connected to the fixing member 50. By placing the temperature detection element 322 on the mounting frame 321 and connecting the abutment element 323 to the side of the mounting frame 321 facing the battery cell 21 in the first direction X and abutting against the battery cell 21, the mounting frame 321 is structured to abut against the battery cell 21 along the first direction X via the abutment element 323. This allows the temperature detection element 322 of the temperature sampling component 32 to detect the temperature of the battery cell 21 and obtain temperature information of the battery cell 21 during use. The compression rebound rate of the abutment element 323 is set to be greater than the compression rebound rate of the mounting frame 321, so that the abutment element 323 is more suitable for the mounting frame 50 than the fixing member 50. The frame 321 has better flexibility and elasticity, which allows the abutment 323 to better absorb the assembly tolerance or assembly error between the frame 321 and the battery cell 21 when the frame 321 abuts against the battery cell 21 in the first direction X via the abutment 323. It can also reduce the assembly gap between the abutment 323 and the battery cell 21, thereby improving the effect of the frame 321 abutting against the battery cell 21 via the abutment 323. It can also improve the assembly quality between the temperature sampling component 32 and the battery cell 21, thereby effectively improving the accuracy and precision of the temperature detection component 322 in detecting the temperature of the battery cell 21. This allows the temperature sampling component 32 to better obtain the actual usage status of the battery cell 21 inside the battery device 100, which is beneficial to improving the stability and reliability of the battery device 100.

[0173] According to some embodiments of this application, as shown in FIG8, the compression rebound rate of the abutment 323 is P, which satisfies 8% ≤ P ≤ 30%.

[0174] For example, the compression rebound rate P of the abutment 323 can be 8%, 9%, 10%, 11%, 12%, 13%, 14%, 15%, 16%, 17%, 18%, 19%, 20%, 21%, 22%, 23%, 24%, 25%, 26%, 27%, 28%, 29%, or 30%, etc.

[0175] In this embodiment, by setting the compression rebound rate of the abutment 323 to 8% to 30%, the abutment 323 has good flexibility and elasticity, while also reducing the manufacturing difficulty and material requirements of the abutment 323. This can improve the effect of the abutment 323 in absorbing the assembly tolerance or assembly error between the mounting frame 321 and the battery cell 21, and reduce the manufacturing cost of the battery device 100.

[0176] According to some embodiments of this application, as shown in Figure 8, the thermal conductivity of the abutment 323 is K1, which satisfies 1W / mk≤K1≤4W / mk.

[0177] For example, the thermal conductivity K1 of the contact member 323 can be 1W / mk, 1.1W / mk, 1.2W / mk, 1.3W / mk, 1.4W / mk, 1.5W / mk, 1.6W / mk, 1.8W / mk, 2W / mk, 2.1W / mk, 2.2W / mk, 2.3W / mk, 2.5W / mk, 2.8W / mk, 3W / mk, 3.2W / mk, 3.5W / mk, 3.6W / mk, 3.7W / mk, 3.8W / mk, 3.9W / mk, or 4W / mk, etc.

[0178] In this embodiment, by setting the thermal conductivity of the abutment 323 to 1W / mk to 4W / mk, the abutment 323 can also have good thermal conductivity, so that the temperature of the battery cell 21 can be better transferred to the mounting bracket 321 through the abutment 323, thereby further improving the accuracy and precision of the temperature detection device 322 in detecting the temperature of the battery cell 21.

[0179] According to some embodiments of this application, referring to FIG8, and further referring to FIG9 and FIG10, FIG9 is a structural schematic diagram of the mounting bracket 321 of the temperature sampling component 32 provided in some embodiments of this application, and FIG10 is a structural schematic diagram of the abutment member 323 of the temperature sampling component 32 provided in some embodiments of this application. The mounting bracket 321 is provided with an assembly cavity 3211. Along the first direction X, the assembly cavity 3211 has a first opening 3212 formed on the surface of the mounting bracket 321 facing the abutment member 323. The abutment member 323 has a first snap-fit ​​portion 3231 protruding on the side facing the mounting bracket 321, and the first snap-fit ​​portion 3231 snaps into the assembly cavity 3211.

[0180] Along the first direction X, the mounting bracket 321 has a first surface 3213 facing the abutment 323. The assembly cavity 3211 has a first opening 3212 formed on the surface of the mounting bracket 321 facing the abutment 323. That is, the assembly cavity 3211 penetrates the first surface 3213 along the first direction X and forms the first opening 3212 on the first surface 3213. Correspondingly, the first snap-fit ​​part 3231 passes through the first opening 3212 along the first direction X and is inserted into the assembly cavity 3211.

[0181] In this embodiment, by providing an assembly cavity 3211 on the mounting bracket 321, and forming a first opening 3212 on the surface of the mounting bracket 321 facing the abutment 323, and providing a first engaging portion 3231 protruding from the side of the abutment 323 facing the mounting bracket 321 and engaging within the assembly cavity 3211, the connection stability and reliability between the mounting bracket 321 and the abutment 323 can be improved, reducing the phenomenon of the abutment 323 falling off between the mounting bracket 321 and the battery cell 21 during use. This is beneficial to improving the stability of the mounting bracket 321 abutting against the battery cell 21 through the abutment 323. On the other hand, it can increase the contact area between the mounting bracket 321 and the abutment 323, which is beneficial to improving the effect of the abutment 323 in transferring the temperature of the battery cell 21 to the mounting bracket 321, thereby further improving the accuracy and precision of the temperature detection component 322 in detecting the temperature of the battery cell 21.

[0182] In some embodiments, along the first direction X, the mounting bracket 321 has a first surface 3213 facing the abutment 323, a first opening 3212 is formed on the first surface 3213, the abutment 323 has a second surface 3232 facing the mounting bracket 321, a first engaging portion 3231 protrudes from the second surface 3232, and the first surface 3213 and the second surface 3232 are in contact with each other. That is, the first surface 3213 and the second surface 3232 abut against each other in the first direction X.

[0183] In this embodiment, by setting the first surface 3213 of the mounting bracket 321 with the first opening 3212 and the second surface 3232 of the abutment 323 with the first snap-fit ​​portion 3231 protruding thereon as a mutually fitted structure, the assembly gap between the mounting bracket 321 and the abutment 323 can be reduced, and the contact area between the mounting bracket 321 and the abutment 323 can be further increased. This is beneficial to further improve the effect of the abutment 323 in transferring the temperature of the battery cell 21 to the mounting bracket 321, so as to further improve the accuracy and precision of the temperature detection element 322 in detecting the temperature of the battery cell 21.

[0184] According to some embodiments of this application, referring to Figures 8, 9 and 10, the assembly cavity 3211 includes a first cavity 3211a and a second cavity 3211b that are interconnected. The first cavity 3211a and the second cavity 3211b are arranged along a first direction X, and the first cavity 3211a is located on the side of the second cavity 3211b facing the abutment 323. The first cavity 3211a forms a first opening 3212 on the surface of the mounting bracket 321 facing the abutment 323. The first latching portion 3231 includes a first latching segment 3231a and a second latching segment 3231b that are connected to each other. The first latching segment 3231a and the second latching segment 3231b are arranged along the first direction X. The first latching segment 3231a is connected to the surface of the abutment 323 facing the mounting bracket 321. At least a portion of the first latching segment 3231a is located in the first cavity 3211a, and at least a portion of the second latching segment 3231b is located in the second cavity 3211b. In the same plane perpendicular to the first direction X, the area of ​​the orthographic projection of the first latching segment 3231a is smaller than the area of ​​the orthographic projection of the second latching segment 3231b.

[0185] The assembly cavity 3211 has two cavities formed on the mounting bracket 321, namely a first cavity 3211a and a second cavity 3211b arranged along the first direction X and interconnected. The first cavity 3211a is located on the side of the second cavity 3211b facing the abutment 323, and the first cavity 3211a forms a first opening 3212 on the surface of the mounting bracket 321 facing the abutment 323. That is, the first cavity 3211a is located between the second cavity 3211b and the second surface 3232 of the connector 325 in the first direction X. The two ends of the first cavity 3211a in the first direction X respectively penetrate the cavity wall surface and the first surface 3213 of the second cavity 3211b, so that the first opening 3212 is formed on the first surface 3213, making the first cavity 3211a a through hole structure extending along the first direction X, and the first snap-fit ​​part 3231 passes through the first cavity 3211a.

[0186] The first latching portion 3231 includes a first latching segment 3231a and a second latching segment 3231b that are connected to each other. The first latching segment 3231a and the second latching segment 3231b are arranged along a first direction X. The first latching segment 3231a is connected to the surface of the abutment 323 facing the mounting bracket 321. That is, the first latching portion 3231 includes a first latching segment 3231a and a second latching segment 3231b that are arranged and connected along the first direction X. The first latching segment 3231a is located on the side of the second latching segment 3231b facing the second surface 3232 of the connector 325 in the first direction X. The second latching segment 3231b is connected to the second surface 3232 of the connector 325 through the first latching segment 3231a.

[0187] At least a portion of the first snap-fit ​​segment 3231a is located within the first cavity 3211a, and at least a portion of the second snap-fit ​​segment 3231b is located within the second cavity 3211b. That is, the first snap-fit ​​segment 3231a and the second snap-fit ​​segment 3231b of the first snap-fit ​​portion 3231 are respectively located within the first cavity 3211a and the second cavity 3211b of the assembly cavity 3211. For example, as shown in Figures 8, 9 and 10, the first snap-fit ​​segment 3231a passes through the first cavity 3211a along the first direction X, and the second snap-fit ​​segment 3231b is entirely located within the second cavity 3211b.

[0188] In the same plane perpendicular to the first direction X, the area of ​​the orthographic projection of the first latching segment 3231a is smaller than the area of ​​the orthographic projection of the second latching segment 3231b. That is, the second latching segment 3231b covers the first latching segment 3231a in the first direction X. Correspondingly, the maximum area of ​​the second latching segment 3231b in the cross-section perpendicular to the first direction X is greater than the maximum area of ​​the first latching segment 3231a in the cross-section perpendicular to the first direction X.

[0189] In this embodiment, the assembly cavity 3211 is configured as a first cavity 3211a and a second cavity 3211b arranged and interconnected along the first direction X, and the first snap-fit ​​portion 3231 is correspondingly configured as a first snap-fit ​​segment 3231a and a second snap-fit ​​segment 3231b arranged and interconnected along the first direction X. The first snap-fit ​​segment 3231a and the second snap-fit ​​segment 3231b are respectively located within the first cavity 3211a and the second cavity 3211b, and are in the same plane perpendicular to the first direction X. The area of ​​the orthographic projection of the first snap-fit ​​segment 3231a is smaller than the area of ​​the orthographic projection of the second snap-fit ​​segment 3231b, which allows the first snap-fit ​​portion 3231 to snap into the assembly cavity 3211 better. This improves the snap-fit ​​effect between the first snap-fit ​​portion 3231 and the assembly cavity 3211, thereby further improving the connection stability and reliability between the mounting bracket 321 and the abutment 323, and reducing the risk of the abutment 323 falling off between the mounting bracket 321 and the battery cell 21 during use.

[0190] In some embodiments, as shown in Figures 8, 9, and 10, the projection of the second latching segment 3231b covers the second cavity 3211b along the first direction X. That is, in the same plane perpendicular to the first direction X, the orthographic projection of the cavity wall surface of the second cavity 3211b lies within the orthographic projection of the second latching segment 3231b, such that the second latching segment 3231b can abut against the cavity wall surface of the second cavity 3211b through which the first cavity 3211a penetrates in the first direction X.

[0191] In this embodiment, by setting the second latching segment 3231b of the first latching portion 3231 to a structure in which the projection of the second cavity 3211b in the first direction X covers the second cavity 3211b, the size of the projection of the second latching segment 3231b in the first direction X is larger than the second opening 3214. This allows the cavity wall surfaces of the second latching segment 3231b and the second cavity 3211b to abut against each other and play a role in restricting the first latching portion 3231 from disengaging from the assembly cavity 3211. This further improves the connection stability and reliability between the mounting bracket 321 and the abutment 323, thereby further reducing the risk of the abutment 323 falling off between the mounting bracket 321 and the battery cell 21 during use.

[0192] According to some embodiments of this application, as shown in FIG9, a second cavity 3211b has a second opening 3214 formed on the outer surface of the mounting bracket 321.

[0193] Optionally, the second cavity 3211b may be formed on the surface of the mounting bracket 321 along the second direction Y, or on the surface of the mounting bracket 321 along the third direction Z, or on the surface of the mounting bracket 321 away from the first surface 3213 along the first direction X.

[0194] In this embodiment, by setting the second cavity 3211b to penetrate the outer surface of the mounting bracket 321 and form the second opening 3214, it is convenient to process and manufacture the second cavity 3211b, which helps to reduce the molding difficulty of the second cavity 3211b and thus reduce the manufacturing difficulty of the mounting bracket 321. On the other hand, it is convenient to assemble the second snap-fit ​​section 3231b into the second cavity 3211b, which helps to reduce the assembly difficulty between the mounting bracket 321 and the abutment member 323.

[0195] In some embodiments, please continue to refer to FIG9, a second opening 3214 is formed on one side of the mounting bracket 321 in a second direction Y, which is perpendicular to the first direction X.

[0196] For example, in the embodiments of this application, the mounting frame 321 is provided with a plurality of assembly cavities 3211. A portion of the assembly cavities 3211 has a second opening 3214 formed only on the surface of the mounting frame 321 along the second direction Y. Another portion of the assembly cavities 3211 has a second opening 3214 formed on both the surface of the mounting frame 321 along the second direction Y and the surface of the mounting frame 321 along the third direction Z.

[0197] In this embodiment, by setting the second opening 3214 formed on the outer surface of the mounting bracket 321 by the second cavity 3211b to one side of the mounting bracket 321 in the second direction Y, the second opening 3214 and the first opening 3212 are respectively formed on one side of the mounting bracket 321 in different directions. This helps to reduce the interference between the first opening 3212 and the second opening 3214, and can reduce the obstruction and interference of the abutment 323 on the second opening 3214, thereby further reducing the assembly difficulty between the mounting bracket 321 and the abutment 323.

[0198] In some embodiments, as shown in Figures 8, 9, and 10, there are multiple assembly cavities 3211 and first snap-fit ​​portions 3231, and each assembly cavity 3211 corresponds to a first snap-fit ​​portion 3231. That is, each first snap-fit ​​portion 3231 is snapped into one assembly cavity 3211.

[0199] For example, the mounting bracket 321 is provided with four assembly cavities 3211. Correspondingly, the first surface 3213 of the connector 325 is provided with four first snap-fit ​​portions 3231. In an embodiment where the mounting bracket 321 is provided with a receiving cavity 3217 for accommodating the temperature sensing element 322, the assembly cavities 3211 are respectively located on both sides of the receiving cavity 3217 in the second direction Y. Correspondingly, in Figures 8 and 9, two of the four assembly cavities 3211 are located on one side of the receiving cavity 3217 in the second direction Y and are arranged at intervals along the third direction Z. The other two assembly cavities 3211 are located on the other side of the receiving cavity 3217 in the second direction Y and are arranged at intervals along the third direction Z. Of course, in other embodiments, the number of assembly cavities 3211 provided on the mounting bracket 321 and the number of first snap-fit ​​portions 3231 provided on the connector 325 can also be two, three, five, or six, etc.

[0200] In this embodiment, by setting multiple assembly cavities 3211 on the mounting bracket 321 and multiple first snap-fit ​​portions 3231 on the abutment member 323, and each first snap-fit ​​portion 3231 snaps into an assembly cavity 3211, on the one hand, the connection stability and reliability between the mounting bracket 321 and the abutment member 323 can be further improved, so as to further alleviate the phenomenon of the abutment member 323 falling off from the mounting bracket 321 and the battery cell 21 during use. On the other hand, the contact area between the mounting bracket 321 and the abutment member 323 can be further increased, which is conducive to further improving the effect of the abutment member 323 in transferring the temperature of the battery cell 21 to the mounting bracket 321.

[0201] According to some embodiments of this application, please refer to Figures 11, 12, 13, 14, 15, and 16. Figure 11 is a structural schematic diagram of a temperature sampling component 32 provided in some embodiments of this application; Figure 12 is an exploded view of the structure of a temperature sampling component 32 provided in some embodiments of this application; Figure 13 is an assembly schematic diagram of the mounting bracket 321 and the abutment member 323 of the temperature sampling component 32 provided in some embodiments of this application; Figure 14 is a cross-sectional view of the mounting bracket 321 and the abutment member 323 of the temperature sampling component 32 provided in some embodiments of this application after mutual assembly; Figure 15 is a structural schematic diagram of the mounting bracket 321 of the temperature sampling component 32 provided in some embodiments of this application; and Figure 16 is a structural schematic diagram of the abutment member 323 of the temperature sampling component 32 provided in some embodiments of this application. Along the first direction X, the abutment member 323 has a second surface 3232 facing the mounting bracket 321. The second surface 3232 is provided with a first slot 3233, and a portion of the mounting bracket 321 is engaged in the first slot 3233. That is, the abutment 323 has a first slot 3233 on the side of the mounting bracket 321 facing the first direction X, and the mounting bracket 321 is inserted into the first slot 3233 along the first direction X.

[0202] In this embodiment, by providing a first slot 3233 on the second surface 3232 of the abutment 323 facing the mounting bracket 321, and having a portion of the mounting bracket 321 engaged in the first slot 3233 along the first direction X, the connection stability and reliability between the mounting bracket 321 and the abutment 323 can be improved, reducing the likelihood of the abutment 323 detaching from the mounting bracket 321 and the battery cell 21 during use. This improves the stability of the mounting bracket 321 abutting against the battery cell 21 via the abutment 323. Furthermore, it increases the contact area between the mounting bracket 321 and the abutment 323, enhancing the effect of the abutment 323 in transferring the temperature of the battery cell 21 to the mounting bracket 321, thereby further improving the accuracy and precision of the temperature detection element 322 in detecting the temperature of the battery cell 21.

[0203] In some embodiments, as shown in Figures 14, 15, and 16, along the first direction X, the mounting bracket 321 has a first surface 3213 facing the abutment member 323, and the first surface 3213 is in contact with the bottom surface of the first slot 3233. That is, the portion of the mounting bracket 321 inserted into the first slot 3233 abuts against the bottom surface of the first slot 3233 along the first direction X.

[0204] In this embodiment, by setting the first surface 3213 of the mounting bracket 321 facing the abutment 323 and the bottom surface of the first slot 3233 of the abutment member 323 in the first direction X to fit together, the assembly gap between the mounting bracket 321 and the abutment member 323 can be reduced, and the contact area between the mounting bracket 321 and the abutment member 323 can be further increased. This is beneficial to further improve the effect of the abutment member 323 in transferring the temperature of the battery cell 21 to the mounting bracket 321, so as to further improve the accuracy and precision of the temperature detection element 322 in detecting the temperature of the battery cell 21.

[0205] According to some embodiments of this application, as shown in Figures 14, 15 and 16, at least one of the two opposite sides of the first slot 3233 is provided with a second snap-fit ​​portion 3234. The mounting bracket 321 is provided with a second slot 3215 on the side facing the second snap-fit ​​portion 3234 in the second direction Y. The second snap-fit ​​portion 3234 is snapped into the second slot 3215. The second direction Y is perpendicular to the first direction X.

[0206] The second slot 3215 on the mounting bracket 321 and the second snap-fit ​​part 3234 protruding from the side of the first slot 3233 are in a one-to-one correspondence structure, with each second snap-fit ​​part 3234 snapping into a second slot 3215.

[0207] For example, the second latching portion 3234 is a structure that extends along the third direction Z, and correspondingly, the second latching groove 3215 passes through the surfaces of both sides of the mounting bracket 321 along the third direction Z.

[0208] In this embodiment, by providing a second engaging portion 3234 protruding from at least one of the two slot sides of the first slot 3233 arranged opposite each other along the second direction Y, and by providing a corresponding second slot 3215 for the second engaging portion 3234 to engage, the stability and reliability of the mounting bracket 321 engaging with the first slot 3233 can be improved. This is beneficial to further improve the connection stability and reliability between the mounting bracket 321 and the abutment 323, thereby reducing the phenomenon of the abutment 323 falling off between the mounting bracket 321 and the battery cell 21 during use.

[0209] In some embodiments, referring to FIG14, the second latching portion 3234 is inclined towards the bottom surface of the first card slot 3233 along the first direction X. That is, the end of the second latching portion 3234 away from the side surface of the first card slot 3233 in the second direction Y is closer to the bottom surface of the first card slot 3233 in the first direction X than the end of the second latching portion 3234 connected to the side surface of the first card slot 3233.

[0210] In this embodiment, by setting the second latching portion 3234 to be inclined towards the bottom surface of the first slot 3233 in the first direction X, the second latching portion 3234 protruding from the side of the first slot 3233 has a barb-like structure, which can further improve the stability and reliability of the mounting bracket 321 latching into the first slot 3233. This is beneficial to further improve the connection stability and reliability between the mounting bracket 321 and the abutment 323, so as to further alleviate the phenomenon of the abutment 323 falling off between the mounting bracket 321 and the battery cell 21 during use.

[0211] In some embodiments, along the second direction Y, the two opposite sides of the first slot 3233 are provided with second engaging portions 3234, and the mounting bracket 321 has second slots 3215 on both sides, with each second engaging portion 3234 engaging within a second slot 3215. Of course, in other embodiments, only one side of the two opposite sides of the first slot 3233 in the second direction Y may be provided with a second engaging portion 3234.

[0212] In this embodiment, by providing second engaging portions 3234 on both sides of the first slot 3233 that are opposite to each other along the second direction Y, and by providing second slots 3215 on both sides of the mounting bracket 321 along the second direction Y for the second engaging portions 3234 to engage, the stability and reliability of the mounting bracket 321 engaging with the first slot 3233 can be further improved, thereby further improving the connection stability and reliability between the mounting bracket 321 and the abutment 323, which helps to alleviate the phenomenon of the abutment 323 falling off between the mounting bracket 321 and the battery cell 21 during use.

[0213] According to some embodiments of this application, referring to Figures 13, 15, and 16, the mounting bracket 321 has an internal receiving cavity 3217 with a third opening 3216. The temperature sensing element 322 is received within the receiving cavity 3217. The mounting bracket 321 has a third opening 3216 at one end in the third direction Z, which is perpendicular to the first direction X and the second direction Y. The groove sidewall of the first slot 3233 includes a first groove sidewall 3235, which is located on the side of the mounting bracket 321 with the third opening 3216 in the third direction Z. A clearance groove 3236 is provided on the first groove sidewall 3235 corresponding to the position of the third opening 3216. The clearance groove 3236 penetrates the first groove sidewall 3235 in the third direction Z and penetrates the second surface 3232 in the first direction X.

[0214] The first slot 3233 has a rectangular orthographic projection in a plane perpendicular to the first direction X. Correspondingly, the first slot 3233 includes four slot sidewalls surrounding the mounting bracket 321, and the slot sidewall located on the side of the mounting bracket 321 with the third opening 3216 in the third direction Z is the first slot sidewall 3235.

[0215] A clearance groove 3236 is provided on the first groove sidewall 3235 at the position corresponding to the third opening 3216. The clearance groove 3236 penetrates the first groove sidewall 3235 along the third direction Z, and the clearance groove 3236 penetrates the second surface 3232 along the first direction X. That is to say, the clearance groove 3236 is provided on the second surface 3232 of the connector 325, and the clearance groove 3236 penetrates the surfaces on both sides of the first groove sidewall 3235 along the third direction Z and is correspondingly provided to the third opening 3216, so that the clearance groove 3236 and the first slot 3233 are interconnected.

[0216] In this embodiment, an avoidance groove 3236 is provided at the position of the first groove sidewall 3235 corresponding to the third opening 3216 of the first slot 3233. The avoidance groove 3236 penetrates both sides of the first groove sidewall 3235 along the third direction Z and penetrates the second surface 3232 along the first direction X. This reduces the obstruction and blockage of the third opening 3216 of the mounting bracket 321 by the first groove sidewall 3235, so that the temperature detection element 322 can be assembled into the receiving cavity 3217 through the third opening 3216.

[0217] In some embodiments, as shown in Figures 13, 15 and 16, along the first direction X, the cavity wall surface of the receiving cavity 3217 near the abutment member 323 is flush with the bottom surface of the relief groove 3236.

[0218] In this embodiment, by setting the cavity wall surface of the receiving cavity 3217 on the side near the abutment 323 in the first direction X and the bottom surface of the relief groove 3236 to be flush and coplanar, the relief groove 3236 can not only improve the relief effect of the relief groove 3236 on the third opening 3216, but also cover the edge of the mounting bracket 321 forming the third opening 3216 through the first groove sidewall 3235. This helps to reduce the risk of the mounting bracket 321 scratching the temperature detection component 322 or other components at the third opening 3216, thereby improving the reliability of the temperature sampling component 32.

[0219] According to some embodiments of this application, as shown in Figures 8 and 13, the abutment 323 is connected to the mounting frame 321 by a vulcanization molding process.

[0220] In this embodiment, by setting the abutment 323 to be connected to the mounting bracket 321 using a vulcanization molding process, the stability and reliability of the abutment 323 connected to the mounting bracket 321 can be further improved. On the other hand, the assembly gap between the abutment 323 and the mounting bracket 321 can be further reduced, thereby improving the fit between the abutment 323 and the mounting bracket 321. This further improves the effect of the abutment 323 in transferring the temperature of the battery cell 21 to the mounting bracket 321, which is beneficial to further improve the accuracy and precision of the temperature detection device 322 in detecting the temperature of the battery cell 21.

[0221] According to some embodiments of this application, as shown in Figures 3, 4, 5 and 6, the battery cell 21 may include a housing 212, an electrode assembly (not shown) and an electrode terminal 211. The electrode assembly is housed in the housing 212, the electrode terminal 211 is disposed on the housing 212 and is electrically connected to the electrode assembly, and the abutment member 323 abuts against the housing 212 along the first direction X.

[0222] Among them, the electrode terminal 211 serves to output or input electrical energy of the battery cell 21. The battery cell 21 includes two electrode terminals 211 with opposite polarities, and both electrode terminals 211 are disposed on the wall of the housing 212 on the side facing the sampling assembly 30 in the first direction X.

[0223] In this embodiment, the outer casing 212 can also be used to contain an electrolyte, such as an electrolyte solution. The outer casing 212 can have various structural forms. The material of the outer casing 212 can also be various, such as copper, iron, aluminum, steel, aluminum alloy, etc. In some embodiments, the outer casing 212 may include a housing and an end cap, the housing having an internal cavity 3217, and the housing being a hollow structure open at one end. The end cap closes to the open end of the housing to form a sealed connection, thereby forming a sealed space for containing the electrode assembly and the electrolyte.

[0224] Optionally, the wall of the housing 212 facing the sampling assembly 30 in the first direction X can be an end cap or a bottom wall of the housing opposite to the end cap in the first direction X. That is, the electrode terminal 211 can be disposed on the end cap of the housing 212 or on the bottom wall of the housing opposite to the end cap in the first direction X.

[0225] It should be noted that the electrode assembly is the component in the battery cell 21 where the electrochemical reaction takes place. The structure of the electrode assembly can be various. For example, the electrode assembly can be a wound structure formed by winding a positive electrode, a separator, and a negative electrode, or a stacked structure formed by arranging the positive electrode, a separator, and a negative electrode in layers. Similarly, there can be one or more electrode assemblies housed in the outer casing 212.

[0226] The abutment 323 abuts against the housing 212 along the first direction X, that is, the mounting bracket 321 abuts against the wall of the housing 212 where the electrode terminals 211 are provided through the abutment 323.

[0227] In this embodiment, the battery cell 21 is provided with a housing 212 and an electrode assembly housed within the housing 212 and an electrode terminal 211 disposed on the housing 212. By setting the abutment member 323 to abut against the housing 212 of the battery cell 21 along the first direction X, it is beneficial to reduce the difficulty of assembling the mounting bracket 321 with the battery cell 21 through the abutment member 323, and to enable the temperature of the battery cell 21 to be better transferred to the mounting bracket 321 through the abutment member 323, so that the temperature detection member 322 can detect the temperature of the battery cell 21, which is beneficial to improve the accuracy and precision of the temperature detection member 322 in detecting the temperature of the battery cell 21.

[0228] According to some embodiments of this application, as shown in Figures 6, 7, and 8, and Figures 11, 12, and 13, the interior of the mounting bracket 321 forms a receiving cavity 3217 with a third opening 3216, and the temperature sensing element 322 is received within the receiving cavity 3217.

[0229] The mounting bracket 321 has a receiving cavity 3217 with a third opening 3216 inside. That is, the mounting bracket 321 has a receiving cavity 3217 for assembling the temperature sensing element 322 inside, and the receiving cavity 3217 extends through at least one end of the mounting bracket 321 so that the third opening 3216 is formed on the mounting bracket 321, and the third opening 3216 communicates with the receiving cavity 3217.

[0230] In this embodiment, by providing a receiving cavity 3217 with a third opening 3216 inside the mounting bracket 321, and housing the temperature sensing element 322 within the receiving cavity 3217, the temperature sampling component 32 with this structure can, on the one hand, provide a certain degree of protection for the temperature sensing element 322 through the mounting bracket 321, thereby reducing the possibility of damage to the temperature sensing element 322 during use, and reducing the assembly difficulty between the temperature sensing element 322 and the mounting bracket 321. On the other hand, it can also reduce the influence of other components on the temperature sensing element 322, which is beneficial to improving the accuracy and precision of the temperature sensing element 322 in detecting the temperature of the battery cell 21.

[0231] According to some embodiments of this application, referring to Figures 6 and 7 and Figures 11 and 12, the temperature sampling assembly 32 may further include a sealant 324, which fills the receiving cavity 3217 and covers the temperature sensing element 322.

[0232] The sealant 324 is filled in the receiving cavity 3217 and covers the temperature sensing element 322. That is, the receiving cavity 3217 is filled with sealant 324, and the temperature sensing element 322 disposed in the receiving cavity 3217 is embedded in the sealant 324, so that the sealant 324 covers the outside of the temperature sensing element 322.

[0233] In this embodiment, the cavity 3217 of the mounting bracket 321 is also filled with sealant 324, and the temperature sensing element 322 is covered by the sealant 324. On the one hand, this can improve the stability and reliability of the temperature sensing element 322 installed in the cavity 3217, and further stabilize the temperature sensing element 322 to alleviate the phenomenon of shaking or bumping of the temperature sensing element 322 in the cavity 3217. On the other hand, it can also seal the temperature sensing element 322 to reduce the phenomenon of damage caused by moisture during use, thereby helping to extend the service life of the temperature sensing element 322.

[0234] According to some embodiments of this application, referring to Figures 7 and 12, the sealant 324 may include a first material layer 3241 and a second material layer 3242. The first material layer 3241 covers the outside of the temperature sensing element 322, and the second material layer 3242 covers the outside of the first material layer 3241. The thermal conductivity of the first material layer 3241 is greater than that of the second material layer 3242, and the water absorption rate of the second material layer 3242 is less than that of the first material layer 3241.

[0235] The first material layer 3241 covers the outside of the temperature sensing element 322, and the second material layer 3242 covers the outside of the first material layer 3241. That is, the sealant 324 is a double-layer structure that covers the outside of the temperature sensing element 322 in sequence. The two layers are made of different materials, namely the first material layer 3241 and the second material layer 3242. The thermal conductivity of the first material layer 3241 is greater than that of the second material layer 3242, and the water absorption rate of the second material layer 3242 is less than that of the first material layer 3241.

[0236] For example, the material of the first material layer 3241 can be various, such as epoxy adhesive or phenyl silicone.

[0237] For example, the material of the second material layer 3242 can be various, such as epoxy resin, natural resin, etc.

[0238] In this embodiment, the sealant 324 is provided with a first material layer 3241 covering the outside of the temperature sensing element 322 and a second material layer 3242 covering the outside of the first material layer 3241, so that the sealant 324 is a double-layer structure that sequentially covers the outside of the temperature sensing element 322. By setting the thermal conductivity of the first material layer 3241 to the thermal conductivity of the second material layer 3242, and setting the water absorption rate of the second material layer 3242 to be less than the water absorption rate of the first material layer 3241, the first material layer 3241 of the inner layer of the sealant 324 has a better thermal conductivity, and the second material layer 3242 of the outer layer of the sealant 324 has a better waterproof effect. Therefore, it is not necessary to make the entire sealant 324 a structure with a good waterproof effect. Thus, while achieving a good sealing and waterproof effect, the thermal conductivity of the sealant 324 can also be improved.

[0239] In some embodiments, the thermal conductivity of the first material layer 3241 is K2, which satisfies 0.4W / mk≤K2≤1W / mk.

[0240] For example, the thermal conductivity K2 of the first material layer 3241 can be 0.4W / mk, 0.41W / mk, 0.42W / mk, 0.45W / mk, 0.48W / mk, 0.5W / mk, 0.55W / mk, 0.6W / mk, 0.65W / mk, 0.7W / mk, 0.75W / mk, 0.8W / mk, 0.85W / mk, 0.9W / mk, 0.95W / mk, or 1W / mk, etc.

[0241] In this embodiment, by setting the thermal conductivity of the first material layer 3241 of the sealant 324 to 0.4 W / mk to 1 W / mk, the first material layer 3241 has good thermal conductivity, so that the sealant 324 can better transfer the temperature to the temperature detection element 322, which is beneficial to improving the accuracy and precision of the temperature detection element 322 in detecting the temperature of the battery cell 21.

[0242] In some embodiments, the water absorption rate of the second material layer 3242 is Wm, which satisfies 0.05% ≤ Wm ≤ 0.5%.

[0243] For example, the water absorption rate Wm of the second material layer 3242 can be 0.05%, 0.06%, 0.07%, 0.08%, 0.09%, 0.1%, 0.11%, 0.12%, 0.15%, 0.18%, 0.2%, 0.22%, 0.25%, 0.28%, 0.3%, 0.32%, 0.35%, 0.38%, 0.4%, 0.42%, 0.45%, 0.48%, 0.49%, or 0.5%, etc.

[0244] In this embodiment, by setting the water absorption rate of the second material layer 3242 of the sealant 324 to 0.05% to 0.5%, the outer layer of the sealant 324 has a better waterproof effect, which is beneficial to improving the sealing effect of the sealant 324 on the temperature detection element 322, thereby further reducing the risk of damage to the temperature detection element 322 after moisture during use, and thus further improving the service life of the temperature detection element 322.

[0245] According to some embodiments of this application, referring to Figures 8 and 9, and Figures 13 and 15, the mounting bracket 321 has a third opening 3216 formed at at least one end in the third direction Z, which is perpendicular to the first direction X. That is, the abutment 323 and the third opening 3216 are respectively provided at one end of the mounting bracket 321 in different directions.

[0246] The mounting bracket 321 has a third opening 3216 at at least one end in the third direction Z. That is, the receiving cavity 3217 may have a third opening 3216 at only one end of the mounting bracket 321 along the third direction Z, or the third opening 3216 may be formed at both ends of the mounting bracket 321.

[0247] In this embodiment, by forming the third opening 3216 of the receiving cavity 3217 at one end of the mounting frame 321 in the third direction Z, the interference between the third opening 3216 on the mounting frame 321 for assembling the temperature sensing element 322 and the abutment 323 is reduced, thereby facilitating the assembly of the temperature sensing element 322 into the receiving cavity 3217 and facilitating the connection of the abutment 323 to the mounting frame 321.

[0248] In some embodiments, the receiving cavity 3217 extends through both ends of the mounting frame 321 along the third direction Z, so that a third opening 3216 is formed at both ends of the mounting frame 321 in the third direction Z.

[0249] In this embodiment, by setting the receiving cavity 3217 to extend through both ends of the mounting frame 321 along the third direction Z, the receiving cavity 3217 can form a third opening 3216 at both ends of the mounting frame 321 along the third direction Z. This facilitates the forming of the receiving cavity 3217 inside the mounting frame 321, which helps to reduce the manufacturing difficulty of the receiving cavity 3217 of the mounting frame 321. On the other hand, it facilitates the assembly of the temperature sensing element 322 into the receiving cavity 3217, which further reduces the assembly difficulty between the temperature sensing element 322 and the mounting frame 321.

[0250] According to some embodiments of this application, referring to Figures 5, 6 and 7 and Figures 11 and 12, the temperature sampling assembly 32 may further include a connector 325, one end of which extends into the receiving cavity 3217 and is electrically connected to the temperature detection element 322, and the other end is located outside the receiving cavity 3217 and is used for electrical connection with the battery management system.

[0251] The connector 325 serves to electrically connect the temperature sensor 322 and the wiring harness assembly 31. The wiring harness assembly 31 is used to electrically connect with the battery management system, thereby enabling the temperature sensor 322 to be electrically connected to the battery management system. In this embodiment, one end of the connector 325 extends into the receiving cavity 3217, such that the end of the connector 325 inside the receiving cavity 3217 is connected to the temperature sensor 322, and the end of the connector 325 outside the receiving cavity 3217 is connected to the wiring harness assembly 31.

[0252] In an exemplary embodiment where the connector 325 is welded to the temperature sensor 322 and the cavity 3217 is filled with sealant 324, the sealant 324 covers the outside of the location where the connector 325 and the temperature sensor 322 are welded together.

[0253] It should be noted that in other embodiments, the temperature sampling component 32 may not have a connector 325, that is, the temperature detection element 322 of the temperature sampling component 32 is directly connected to the wiring harness component 31.

[0254] In this embodiment, the temperature sampling component 32 is further provided with a connector 325, one end of which extends into the receiving cavity 3217 and is connected to the temperature detection element 322, while the other end is located outside the receiving cavity 3217 and is used for electrical connection with the battery management system. This reduces the difficulty of electrical connection between the temperature detection element 322 and the battery management system. Furthermore, the connector 325 and the temperature detection element 322 can be assembled together before being assembled into the battery device 100 and electrically connected to the battery management system through the connector 325. This helps to optimize the production cycle of the battery device 100 and improve the production efficiency of the battery device 100.

[0255] According to some embodiments of this application, referring to Figures 5, 6, 7, 11, and 12, the temperature sampling assembly 32 may further include a connector 325 for electrically connecting the temperature detection element 322 and the battery management system. That is, the temperature detection element 322 is interconnected with the wiring harness assembly 31 via the connector 325.

[0256] In this embodiment, the temperature sampling component 32 is also provided with a connector 325, which is used to electrically connect the temperature detection component 322 and the battery management system to realize the electrical connection between the temperature detection component 322 and the battery management system, thereby reducing the difficulty of the electrical connection between the temperature detection component 322 and the battery management system and reducing the assembly difficulty of the battery device 100.

[0257] According to some embodiments of this application, referring to Figures 6 and 7, the connector 325 may include two connecting lines 3251 with opposite polarities, which are respectively connected to the positive and negative terminals of the temperature sensing element 322. That is, the positive and negative terminals of the temperature sensing element 322 are electrically connected to the wiring harness assembly 31 via the two connecting lines 3251.

[0258] One end of the connecting wire 3251 extends into the receiving cavity 3217 of the mounting bracket 321 and is welded to the temperature sensing element 322, while the other end is located outside the receiving cavity 3217 and connected to the wire harness assembly 31.

[0259] It should be noted that, in this embodiment, the temperature sensing element 322 can be a single-ended leaded thermistor.

[0260] In this embodiment, by setting the connector 325 as two connecting lines 3251 with opposite polarities, and connecting the two connecting lines 3251 of the connector 325 to the positive and negative terminals of the temperature detection element 322 respectively, an electrical connection between the connector 325 and the temperature detection element 322 is achieved. The structure is simple, easy to assemble, and the connector 325 has good flexibility, so that the connector 325 can be laid out and arranged within the battery device 100.

[0261] According to some embodiments of this application, referring to Figures 6 and 7, and further referring to Figure 17, Figure 17 is a cross-sectional view of the connector 325 of the temperature sampling assembly 32 provided in some embodiments of this application. The connecting line 3251 may include a conductor 3251a and an insulating shell 3251b. The conductor 3251a is electrically connected to the temperature detection element 322. The insulating shell 3251b covers the outside of the conductor 3251a, and the insulating shells 3251b of the two connecting lines 3251 are interconnected, forming a weak structure 3251c at the connection point.

[0262] The insulating shell 3251b of each connecting wire 3251 serves to insulate and isolate the conductor 3251a from other components or another connecting wire 3251. The insulating shell 3251b can be made of various materials, such as rubber, plastic or silicone.

[0263] The insulating shells 3251b of the two connecting wires 3251 are interconnected and form a weak structure 3251c at the connection point. That is, the insulating shells 3251b of the two connecting wires 3251 are interconnected, and the connection position between the insulating shells 3251b of the two connecting wires 3251 forms a weak structure 3251c. In other words, the connection structure between the insulating shells 3251b of the two connecting wires 3251 is a weak connection relationship, so that the weak structure 3251c between the two connecting wires 3251 is configured to be destroyed when subjected to external force, so that the two connecting wires 3251 can be further stripped.

[0264] Optionally, the weak structure 3251c between the insulating shells 3251b of the two connecting wires 3251 can be of various types. For example, the insulating shells 3251b of the two connecting wires 3251 can be integrally formed, and a weak area is formed between the insulating shells 3251b of the two connecting wires 3251. This weak area is the weak structure 3251c between the two connecting wires 3251. Of course, the insulating shells 3251b of the two connecting wires 3251 can also be separate structures, and the insulating shells 3251b of the two connecting wires 3251 can be bonded to each other, so that the weak structure 3251c is formed at the bonding position of the insulating shells 3251b of the two connecting wires 3251.

[0265] In this embodiment, the connecting wire 3251 is provided with a conductor 3251a and an insulating shell 3251b covering the outside of the conductor 3251a. By connecting the insulating shells 3251b of the two connecting wires 3251 to each other and forming a weak structure 3251c at the connection point, it is convenient to organize and assemble the two connecting wires 3251 inside the battery device 100, which helps to improve the regularity of the two connecting wires 3251 and optimize the layout of the two connecting wires 3251 inside the battery device 100. On the other hand, when the connecting wires 3251 are pulled during use, the two connecting wires 3251 can be pulled apart. The mutual stripping allows one connecting wire 3251 to separate from the other connecting wire 3251 when subjected to external force. This enables the weak structure 3251c between the insulating shells 3251b of the two connecting wires 3251 to buffer and absorb the external force on the connecting wires 3251, thereby alleviating the phenomenon of rigid pulling on the connecting wires 3251. This reduces the possibility of breakage or connection failure of the connecting wires 3251 during use, thereby reducing the risk of failure or damage to the temperature sampling component 32 during use and improving the stability and service life of the temperature sampling component 32.

[0266] In some embodiments, as shown in FIG17, a groove 3251d is defined between the insulating shells 3251b of the two connecting lines 3251, and the bottom wall of the groove 3251d forms a weak structure 3251c.

[0267] Among them, the insulating shells 3251b of the two connecting lines 3251 jointly define a groove 3251d, that is, the groove 3251d is formed between the insulating shells 3251b of the two connecting lines 3251. In other words, the groove 3251d is formed by the recess at the connection of the insulating shells 3251b of the two connecting lines 3251, so that the bottom part of the groove 3251d is the weak structure 3251c between the two connecting lines 3251.

[0268] For example, two connecting lines 3251 are arranged side by side, and the arrangement direction of the two connecting lines 3251 is located in a plane jointly defined by the second direction Y and the third direction Z. Grooves 3251d are formed on both sides of the two connecting lines 3251 in the first direction X. The two grooves 3251d are correspondingly arranged along the first direction X, and a weak structure 3251c is formed between the bottom surfaces of the grooves of the two grooves 3251d. That is, the arrangement direction of the two connecting lines 3251 is parallel to the plane jointly defined by the second direction Y and the third direction Z, and two grooves 3251d are formed between the insulating shells 3251b of the two connecting lines 3251. The positions of the two grooves 3251d in the first direction X are corresponding, and the openings of the two grooves 3251d are located on both sides of the connecting line 3251 in the first direction X. Correspondingly, the weak structure 3251c between the two connecting lines 3251 is located between the bottom surfaces of the grooves 3251d arranged along the first direction X.

[0269] In this embodiment, by forming a groove 3251d between the insulating shells 3251b of the two connecting lines 3251, the structural strength at the point where the insulating shells 3251b of the two connecting lines 3251 are connected is weakened, thereby forming a weak structure 3251c between the two connecting lines 3251 on the bottom wall of the groove 3251d. The structure is simple, easy to manufacture, and facilitates the separation of the two connecting lines 3251 when subjected to external force.

[0270] In some embodiments, please continue to refer to Figure 17, the insulating shell 3251b of the two connecting lines 3251 is integrally formed. That is, the insulating shell 3251b on the outside of the conductors 3251a of the two connecting lines 3251 is formed by an integral process, and a weak structure 3251c is formed on the insulating shell 3251b between the conductors 3251a of the two connecting lines 3251.

[0271] For example, the insulating housing 3251b of the two connecting wires 3251 can be manufactured by an integral molding process such as injection molding or extrusion molding.

[0272] Of course, the structure of the temperature sampling component 32 is not limited to this. In other embodiments, the temperature sampling component 32 can also have other structures. For example, the insulating shells 3251b of the two connecting lines 3251 can be separately arranged, and the insulating shells 3251b of the two connecting lines 3251 can be bonded together. That is to say, the adhesive used to bond the insulating shells 3251b of the two connecting lines 3251 is a weak structure 3251c.

[0273] In this embodiment, by setting the insulating shells 3251b of the two connecting lines 3251 as an integrally formed structure, a weak structure 3251c is formed at the connection position of the insulating shells 3251b of the two connecting lines 3251. The connector 325 with this structure can reduce the molding difficulty of the weak structure 3251c between the insulating shells 3251b of the two connecting lines 3251, and can improve the molding efficiency of the connector 325, which is conducive to improving the production efficiency of the connector 325.

[0274] Of course, the structure of connector 325 is not limited to this. In some embodiments, connector 325 can also be other structures. Referring to Figures 11 and 12, connector 325 is a circuit board. Connector 325 includes a substrate 3252, two terminals 3253 and two pads 3254. Two wires (not shown in the figure) are provided in the substrate 3252. The polarities of the two wires are opposite. The two terminals 3253 and the two pads 3254 are all provided on the substrate 3252. Each terminal 3253 is electrically connected to a pad 3254 through a wire. The two terminals 3253 are respectively connected to the positive and negative terminals of the temperature sensing element 322. The two pads 3254 are used for electrical connection with the battery management system.

[0275] The substrate 3252 is a structure in the circuit board used to load and carry wires, terminals 3253 and pads 3254. The wires are embedded in the substrate 3252. The specific structure of the circuit board can be found in the relevant technology, and will not be described in detail here.

[0276] It should be noted that the wires, terminals 3253 and pads 3254 are in a one-to-one correspondence structure. Each wire is connected to a terminal 3253 and a pad 3254 to form a connection circuit of the connector 325, and the two pads 3254 are respectively connected to different wire harnesses of the wire harness assembly 31.

[0277] For example, the terminal 3253 is welded to the temperature sensing element 322.

[0278] It should be noted that, in this embodiment, the temperature sensing element 322 can be a surface-mount thermistor.

[0279] In this embodiment, the connector 325 is configured as a circuit board, and the connector 325 includes a substrate 3252, two terminals 3253 and two pads 3254. Each terminal 3253 is connected to a pad 3254 through a wire in the substrate 3252. The two terminals 3253 are respectively connected to the positive and negative terminals of the temperature sensing element 322 to realize the electrical connection between the connector 325 and the temperature sensing element 322. The connector 325 with this structure can reduce the assembly difficulty between the connector 325 and the temperature sensing element 322, and can effectively realize the separation between the two terminals 3253 and the two pads 3254, which helps to reduce the risk of short circuit in the temperature sampling component 32 during use.

[0280] In some embodiments, as shown in Figures 11 and 12, two pads 3254 are spaced apart on the substrate 3252.

[0281] For example, the two pads 3254 are spaced apart along the second direction Y.

[0282] In this embodiment, by spacing the two pads 3254 of the connector 325 on the substrate 3252, the separation effect between the two pads 3254 can be further improved, which helps to further reduce the risk of short circuit in the temperature sampling component 32 during use.

[0283] In some embodiments, referring to Figures 11 and 12, a partition groove 3252a is provided on one side of the substrate 3252 in its thickness direction, and the partition groove 3252a extends through both sides of the substrate 3252 in the thickness direction of the substrate 3252. In the arrangement direction of the two pads 3254, the partition groove 3252a is located between the two pads 3254.

[0284] The thickness direction of the substrate 3252 is the first direction X, the partition groove 3252a is disposed between the two pads 3254 in the second direction Y, and the partition groove 3252a is a structure that penetrates the surface of both sides of the substrate 3252 along the first direction X.

[0285] In this embodiment, by providing a partition groove 3252a that penetrates both sides of the substrate 3252 in the thickness direction on the substrate 3252, and the partition groove 3252a is located between the two pads 3254 in the arrangement direction of the two pads 3254, the physical separation between the two pads 3254 can be further realized, which is beneficial to further reduce the risk of short circuit in the low-temperature sampling component 32 during use.

[0286] According to some embodiments of this application, as shown in FIG5, the mounting bracket 321 is snapped into the fastener 50.

[0287] Of course, in other embodiments, the connection structure between the mounting bracket 321 and the fastener 50 can also be adhesive, bolted, or screwed.

[0288] In this embodiment, by setting the mounting bracket 321 to be snapped onto the fixing member 50, the assembly difficulty between the mounting bracket 321 and the fixing member 50 can be reduced. There is no need to introduce other more complex structures or components to achieve the assembly between the mounting bracket 321 and the fixing member 50, which is conducive to improving the assembly efficiency between the temperature sampling component 32 and the fixing member 50. On the other hand, the detachable connection between the mounting bracket 321 and the fixing member 50 can be realized, which facilitates the maintenance or replacement of the temperature sampling component 32 during later use, and helps to reduce the difficulty and cost of later maintenance of the temperature sampling component 32.

[0289] In some embodiments, as shown in Figures 5, 6, 7 and 8, the mounting bracket 321 is provided with a third slot 3218, and a portion of the fastener 50 is engaged in the third slot 3218.

[0290] It should be noted that in other embodiments, the snap-fit ​​structure between the mounting bracket 321 and the fixing member 50 can also be other structures. For example, the fixing member 50 is provided with a third slot 3218, and correspondingly, at least part of the mounting bracket 321 is snapped into the third slot 3218.

[0291] In this embodiment, by providing a third slot 3218 on the mounting bracket 321, and having part of the fastener 50 inserted into the third slot 3218, the mounting bracket 321 and the fastener 50 are snapped together, thus achieving a simple structure and easy assembly.

[0292] In some embodiments, as shown in Figures 6, 7, 8, 11, 12, and 13, the mounting bracket 321 has a third slot 3218 on at least one side in the second direction Y, which is perpendicular to the first direction X.

[0293] For example, the mounting bracket 321 has a third slot 3218 on both sides of its surface in the second direction Y.

[0294] In this embodiment, by setting the third slot 3218 of the mounting bracket 321 for engaging with the fixing member 50 on at least one side of the mounting bracket 321 in the second direction Y, the third slot 3218 of the mounting bracket 321 for engaging with the fixing member 50 and the abutment member 323 are respectively located on one side of the mounting bracket 321 in different directions, thereby reducing the interference between the abutment member 323 and the fixing member 50, and reducing the difficulty of engaging the mounting bracket 321 with the fixing member 50.

[0295] According to some embodiments of this application, as shown in Figures 3, 4 and 5, the battery device 100 may include a busbar 22 and a plurality of battery cells 21. The busbar 22 is electrically connected to the plurality of battery cells 21 and is a fixing member 50.

[0296] In this embodiment, the battery device 100 is further provided with a busbar component 22, which electrically connects multiple battery cells 21. The mounting bracket 321 of the temperature sampling component 32 is mounted on the busbar component 22. This allows the busbar component 22 to provide assembly and fixation for the mounting bracket 321 of the temperature sampling component 32 while realizing the electrical connection between multiple battery cells 21. This eliminates the need for other components in the battery device 100 to assemble and stabilize the mounting bracket 321, which helps to optimize the assembly process of the battery device 100 and reduces the manufacturing cost of the battery device 100.

[0297] According to some embodiments of this application, this application also provides an electrical device, which includes a battery device 100 of any of the above schemes, and the battery device 100 is used to provide electrical energy to the electrical device.

[0298] The electrical device can be any of the aforementioned devices or systems that utilize battery device 100.

[0299] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other.

[0300] The above are merely preferred embodiments of this application and are not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A battery device, comprising: Battery cell; A fixing member is disposed on one side of the battery cell in the first direction; as well as A temperature sampling assembly includes a mounting bracket and a temperature sensing element. The mounting bracket is connected to the fixing member, and the temperature sensing element is disposed on the mounting bracket. The temperature sensing element is configured to detect the temperature of the battery cell. The temperature sampling component further includes an abutment member connected to the mounting bracket. Along the first direction, the abutment member is located on the side of the mounting bracket facing the battery cell and abuts against the battery cell. The compression rebound rate of the abutment member is greater than that of the mounting bracket.

2. The battery device according to claim 1, wherein, The compression rebound rate of the abutment is P, which satisfies 8% ≤ P ≤ 30%.

3. The battery device according to claim 1 or 2, wherein, The thermal conductivity of the abutment is K1, which satisfies 1W / mk≤K1≤4W / mk.

4. The battery device according to any one of claims 1-3, wherein, The mounting bracket is provided with an assembly cavity. Along the first direction, the assembly cavity forms a first opening on the surface of the mounting bracket facing the abutment. The abutment has a first snap-fit ​​portion protruding on the side facing the mounting bracket, and the first snap-fit ​​portion snaps into the assembly cavity.

5. The battery device according to claim 4, wherein, Along the first direction, the mounting bracket has a first surface facing the abutment, the first opening is formed on the first surface, the abutment has a second surface facing the mounting bracket, and the first snap-fit ​​portion protrudes from the second surface; The first surface and the second surface are bonded together.

6. The battery device according to claim 4 or 5, wherein, The assembly cavity includes a first cavity and a second cavity that are interconnected. The first cavity and the second cavity are arranged along the first direction, and the first cavity is located on the side of the second cavity facing the abutment. The first cavity forms the first opening on the surface of the mounting bracket facing the abutment. The first snap-fit ​​portion includes a first snap-fit ​​segment and a second snap-fit ​​segment connected to each other, and the first snap-fit ​​segment and the second snap-fit ​​segment are arranged along the first direction. The first snap-fit ​​segment is connected to the surface of the abutment facing the mounting bracket. At least a portion of the first snap-fit ​​segment is located in the first cavity, and at least a portion of the second snap-fit ​​segment is located in the second cavity. In the same plane perpendicular to the first direction, the area of ​​the orthographic projection of the first snap-fit ​​segment is smaller than the area of ​​the orthographic projection of the second snap-fit ​​segment.

7. The battery device according to claim 6, wherein, Along the first direction, the projection of the second snap-fit ​​segment covers the second cavity.

8. The battery device according to claim 6 or 7, wherein, The second cavity has a second opening formed on the outer surface of the mounting bracket.

9. The battery device according to claim 8, wherein, The second opening is formed on one side of the mounting bracket in a second direction, which is perpendicular to the first direction.

10. The battery device according to any one of claims 4-9, wherein, There are multiple assembly cavities and multiple first snap-fit ​​parts, and each assembly cavity corresponds to one of the first snap-fit ​​parts.

11. The battery device according to any one of claims 1-3, wherein, Along the first direction, the abutment has a second surface facing the mounting bracket, the second surface being provided with a first slot, and a portion of the mounting bracket is engaged in the first slot.

12. The battery device according to claim 11, wherein, Along the first direction, the mounting bracket has a first surface facing the abutment, the first surface being in contact with the bottom surface of the first slot.

13. The battery device according to claim 11 or 12, wherein, At least one of the two opposite sides of the first slot in the second direction has a second snap-fit ​​portion protruding from it. The mounting bracket has a second slot on the side of the bracket facing the second snap-fit ​​portion in the second direction. The second snap-fit ​​portion is snapped into the second slot. The second direction is perpendicular to the first direction.

14. The battery device according to claim 13, wherein, Along the first direction, the second snap-fit ​​portion is inclined toward the bottom surface of the first slot.

15. The battery device according to claim 13 or 14, wherein, Along the second direction, the two opposite sides of the first slot are provided with the second snap-fit ​​portion, and the two sides of the mounting bracket are provided with the second slot, and each second snap-fit ​​portion is snapped into one of the second slots.

16. The battery device according to any one of claims 13-15, wherein, The mounting bracket has a receiving cavity with a third opening inside, and the temperature sensing element is received in the receiving cavity. The mounting bracket has the third opening at one end in a third direction, which is perpendicular to the first direction and the second direction. The first slot has a slot sidewall, which is located on the side of the mounting bracket where the third opening is formed in the third direction. The first slot sidewall is provided with a clearance groove corresponding to the position of the third opening. The clearance groove penetrates the first slot sidewall in the third direction and penetrates the second surface in the first direction.

17. The battery device according to claim 16, wherein, Along the first direction, the cavity wall surface of the receiving cavity on the side near the abutment is flush with the bottom surface of the clearance groove.

18. The battery device according to any one of claims 1-17, wherein, The abutment is connected to the mounting frame by a vulcanization molding process.

19. The battery device according to any one of claims 1-18, wherein, The battery cell includes a housing, an electrode assembly, and electrode terminals. The electrode assembly is housed within the housing, and the electrode terminals are disposed on the housing and electrically connected to the electrode assembly. The abutting member abuts against the outer shell along the first direction.

20. The battery device according to any one of claims 1-19, wherein, The mounting bracket has a cavity with a third opening inside, and the temperature sensing element is housed in the cavity.

21. The battery device according to claim 20, wherein, The temperature sampling assembly also includes a sealant that fills the cavity and covers the temperature sensing element.

22. The battery device according to claim 21, wherein, The sealant includes a first material layer and a second material layer, wherein the first material layer covers the outside of the temperature sensing element, and the second material layer covers the outside of the first material layer; The thermal conductivity of the first material layer is greater than that of the second material layer, and the water absorption rate of the second material layer is less than that of the first material layer.

23. The battery device according to claim 22, wherein, The thermal conductivity of the first material layer is K2, which satisfies 0.4W / mk≤K2≤1W / mk.

24. The battery device according to claim 22 or 23, wherein, The water absorption rate of the second material layer is Wm, which satisfies the condition 0.05% ≤ Wm ≤ 0.5%.

25. The battery device according to any one of claims 20-24, wherein, The mounting bracket has the third opening at at least one end in a third direction, which is perpendicular to the first direction.

26. The battery device according to claim 25, wherein, The receiving cavity extends through both ends of the mounting frame in the third direction, so that the third opening is formed at both ends of the mounting frame in the third direction.

27. The battery device according to any one of claims 20-26, wherein, The temperature sampling component also includes: The connector has one end extending into the receiving cavity and electrically connected to the temperature sensing element, and the other end located outside the receiving cavity and used for electrical connection to the battery management system.

28. The battery device according to any one of claims 1-27, wherein, The temperature sampling assembly also includes a connector for electrically connecting the temperature sensing element and the battery management system.

29. The battery device according to claim 28, wherein, The connector includes two connecting wires with opposite polarities, which are respectively connected to the positive and negative terminals of the temperature sensing element.

30. The battery device according to claim 29, wherein, The connecting line includes: A conductor, electrically connected to the temperature sensing element; An insulating shell covers the outside of the conductor, and the insulating shells of the two connecting wires are connected to each other and form a weak structure at the connection.

31. The battery device according to claim 30, wherein, A groove is defined between the insulating shells of the two connecting wires, and the bottom wall of the groove forms the weak structure.

32. The battery device according to claim 30 or 31, wherein, The insulating shells of the two connecting wires are integrally formed.

33. The battery device according to claim 28, wherein, The connector is a circuit board, which includes a substrate, two terminals and two pads. Two wires are disposed in the substrate, and the two wires have opposite polarities. The two terminals and the two pads are disposed on the substrate, and each terminal is electrically connected to a pad through a wire. The two terminals are respectively connected to the positive and negative terminals of the temperature sensing device, and the two pads are used for electrical connection with the battery management system.

34. The battery device according to claim 33, wherein, The two pads are spaced apart on the substrate.

35. The battery device according to claim 34, wherein, The substrate has a partition groove on one side in its thickness direction, and the partition groove extends through both sides of the substrate in the thickness direction. In the arrangement direction of the two pads, the partition groove is located between the two pads.

36. The battery device according to any one of claims 1-35, wherein, The mounting bracket is snapped into the fastener.

37. The battery device according to claim 36, wherein, The mounting bracket is provided with a third slot, and part of the fastener is engaged in the third slot.

38. The battery device according to claim 37, wherein, The mounting bracket has the third slot on at least one side in the second direction, which is perpendicular to the first direction.

39. The battery device according to any one of claims 1-38, wherein, The battery device includes a current-combining component and a plurality of battery cells, wherein the current-combining component is electrically connected to the plurality of battery cells; The busbar component is the fixing component.

40. An electrical device comprising a battery device as claimed in any one of claims 1-39, the battery device being used to provide electrical energy.

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