Battery device and electric device

Abstract

The embodiment of the utility model provides a battery device and a power utilization device, and relates to the technical field of batteries. The battery device comprises a battery monomer assembly, a collection assembly and a protection part, the battery monomer assembly comprises a plurality of battery monomers arranged along a first direction, each battery monomer comprises a shell and a pressure relief mechanism, the shell comprises a first wall and a second wall which are oppositely arranged along a second direction, and the pressure relief mechanism is arranged on the first wall. The acquisition assembly is configured to acquire information of the battery monomers, the acquisition assembly comprises at least one wire harness group, and at least part of the wire harness group is arranged on the side, away from the second wall, of the first wall. The protection part is configured to protect the wire harness group and is at least partially located on the side, away from the first wall, of the wire harness group in the second direction. According to the battery device provided by the embodiment of the invention, the protection piece can reduce the influence on the wire harness group caused by the contact between the emission of the battery device discharged by the pressure relief mechanism and the wire harness group from the side, deviating from the first wall, of the wire harness group, so that the reliability of the battery device is improved.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to a battery device and an electrical device. Background Art

[0002] Energy conservation and emission reduction are the key to the sustainable development of the automobile industry. In this case, electric vehicles have become an important part of the sustainable development of the automobile industry due to their advantages of energy conservation and environmental protection. For electric vehicles, battery technology is an important factor in their development.

[0003] In the development of battery technology, the reliability of battery devices is an issue that cannot be ignored. If the reliability of a battery device is poor, it will be difficult for the battery device to be popularized. Therefore, how to improve the reliability of battery devices is a technical issue in battery technology that needs to be considered for a long time. Utility Model Content

[0004] The present application provides a battery device and an electrical device, which can improve the reliability of the battery device.

[0005] This application is achieved through the following technical solutions:

[0006] In a first aspect, an embodiment of the present application provides a battery device, including a battery cell assembly, a collection assembly, and a protective member, wherein the battery cell assembly includes a plurality of battery cells arranged along a first direction, the battery cells include a housing and a pressure relief mechanism, the housing includes a first wall and a second wall arranged opposite to each other along a second direction, the pressure relief mechanism is arranged on the first wall, and the first direction is perpendicular to the second direction. The collection assembly is configured to collect information of the battery cells, the collection assembly includes at least one wiring harness group, and at least a portion of the wiring harness group is arranged on a side of the first wall away from the second wall. The protective member is configured to protect the wiring harness group, and along the second direction, the protective member is at least partially located on a side of the wiring harness group away from the first wall.

[0007] In the above embodiment, the protective member is at least partially located on the side of the wiring harness group away from the first wall, which can reduce the emission discharged by the battery device through the pressure relief mechanism from contacting the wiring harness group from the side of the wiring harness group away from the first wall and affecting the wiring harness group, thereby improving the reliability of the battery device.

[0008] In some embodiments, the protective member includes a first protective portion and a second protective portion connected to each other, the first protective portion is located on the side of the wiring harness group away from the first wall, and the second protective portion is arranged opposite to the wiring harness group along a third direction, and the first direction, the second direction and the third direction are perpendicular to each other.

[0009] In the above embodiment, the first protection part can protect the side of the wiring harness group away from the first wall, and the second protection part can protect the side of the wiring harness group along the third direction, thereby improving the protection performance of the wiring harness group. Take the upright battery cell as an example. At this time, the first wall of the battery cell is the top wall, and the second wall is the bottom wall. When the pressure relief mechanism releases pressure, high-temperature gas and some other solid particles will be discharged. After being discharged, the solid particles may be obstructed and fall again when passing through the inner wall of the box. At this time, the first protection part can reduce the free fall of solid particles onto the wiring harness group. When the pressure relief mechanism releases pressure, the discharged solid particles may be blocked and rebound in directions other than the direction of gravity. The solid particles may also contact the wiring harness group from the side of the wiring harness group. At this time, the second protection part can reduce the contact between the rebounded particles and the wiring harness group.

[0010] In some embodiments, in a projection plane perpendicular to the second direction, an orthographic projection of the second protecting portion is located between an orthographic projection of the pressure relief mechanism and an orthographic projection of the wiring harness group along the third direction.

[0011] In the above embodiment, the second protection part is arranged on the side of the wiring harness group close to the pressure relief mechanism, which can reduce the impact of the emissions discharged by the pressure relief mechanism on the wiring harness group from this side. In a specific application scenario, when the pressure relief mechanism releases pressure, the discharged emissions are more likely to contact the wiring harness group from the side of the wiring harness group close to the pressure relief mechanism and cause an impact, and the temperature of the solid particles or gas contacting the wiring harness group from this side is higher, and the impact is greater. In this embodiment, by setting the second protection part between the pressure relief mechanism and the wiring harness group, the protection performance of the protective member on the wiring harness group can be improved, thereby improving the reliability of the battery device.

[0012] In some embodiments, the protective member further includes a third protecting portion, which is connected to the second protecting portion, arranged opposite to the first protecting portion along the second direction, and located on a side of the wiring harness group facing the first wall.

[0013] In the above embodiment, providing the third protection portion can reduce the influence of the gas or liquid flowing on the first wall on the wiring harness group, so as to improve the reliability of the battery device.

[0014] In some embodiments, along the third direction, the protective member has an opening on a side opposite to the second protective portion; the wire harness group includes a plurality of wire harnesses, and a portion of at least one wire harness extends outside the protective member through the opening.

[0015] In the above embodiment, the second protection portion connects the first protection portion and the third protection portion, and the first protection portion and the third protection portion are arranged relatively to each other along the second direction, and the second protection portion is located on one side of the wiring harness group along the third direction, and can form an enclosure structure having an opening on one side facing the third direction, and part of the wiring harness group is located in the enclosure structure, and the enclosure structure can realize protection of the wiring harness group, and the wiring harness group extends outside the protective member through the opening, and can realize electrical connection with other components.

[0016] In some embodiments, the acquisition component includes a temperature detection component, and the plurality of wiring harnesses include a first wiring harness, a portion of which extends outside the protective component through the opening and is electrically connected to the temperature detection component.

[0017] In the above embodiment, by providing a temperature detection element and protecting the portion of the first wiring harness connected to the temperature detection element, the temperature of the battery cell can be detected, while the risk of damage to the first wiring harness can be reduced, thereby improving the reliability of the battery device.

[0018] In some embodiments, the plurality of wire harnesses include a second wire harness, a portion of which extends through the opening to outside the protective member and is electrically connected to the battery cell.

[0019] In the above embodiment, by providing a protective member to protect the portion of the second wire harness connected to the battery cell, the risk of damage to the second wire harness can be reduced, thereby improving the reliability of the battery device.

[0020] In some embodiments, the battery device also includes a busbar, which electrically connects at least two battery cells. The busbar is located on the side of the first wall facing away from the second wall. In a projection plane perpendicular to the second direction, the orthographic projection of the protective member is located along the third direction between the orthographic projection of the pressure relief mechanism and the orthographic projection of the busbar, and the opening is set toward the busbar. The second wiring harness is electrically connected to the battery cells through the busbar.

[0021] In the above embodiment, the busbar connects at least two battery cells, and the second wiring harness is electrically connected to the battery cell through the busbar, so that the information of at least two battery cells can be obtained at the same time on the basis of setting a connection point, and the number of wiring harness groups in the acquisition component can be reduced. In the projection plane perpendicular to the second direction, the positive projection of the protective member is located between the positive projection of the pressure relief mechanism and the positive projection of the busbar along the third direction, so that the protective member and the wiring harness group located inside the protective member can be placed in a better position, because the busbar has a certain thickness in the second direction, so the protective member arranged in this way can reduce the space occupied in the second direction, thereby improving the energy density of the battery device. The opening formed by the protective member is arranged toward the busbar, and the second wiring harness is electrically connected to the battery cell through the busbar, so that the wiring harness group can be directly connected to the busbar after being led out from the opening, which can reduce the layout path of the busbar, and can also make the area of ​​the wiring harness group located outside the protective member smaller, so that the wiring harness group can be better protected.

[0022] In some embodiments, the melting point of the protective element is greater than or equal to 600° C. With this configuration, the protective element can have better high temperature resistance, and when shielding high temperature emissions discharged through the pressure relief mechanism, the protective element is not easily damaged when the emissions contact the protective element.

[0023] In some embodiments, the protective member is an insulating material. This setting can reduce the risk of short circuits in the battery device. In some specific application scenarios, the surface of the battery cell in the battery device does not have an isolation membrane, and the protective member may contact the battery cell. At this time, the protective member may be electrically connected to the battery cell, thereby causing the risk of short circuits. In other specific application scenarios, the surface of the battery cell in the battery device has an isolation membrane, and the protective member may contact the battery cell. During the assembly of the battery device or during use, the isolation membrane on the surface of the battery cell is prone to wear, which causes the protective member to be electrically connected to the battery cell, thereby causing the risk of short circuits. In this embodiment, by setting the protective member to an insulating material, the occurrence of the above situation can be effectively reduced.

[0024] In some embodiments, the protective member is a ceramic composite sheet or a mica sheet. This configuration can, on the one hand, make the protective member have good insulation properties, which can reduce the short circuit in the battery device; on the other hand, make the protective member have good high temperature resistance, so as to reduce the impact of the exhaust discharged by the pressure relief mechanism on the wiring harness group, thereby improving the reliability of the battery device.

[0025] In some embodiments, in a projection plane perpendicular to the second direction, an orthographic projection of the wiring harness group does not overlap with an orthographic projection of the pressure relief mechanism.

[0026] In the above embodiment, the orthographic projection of the wiring harness group in the projection plane perpendicular to the second direction does not overlap with the orthographic projection of the pressure relief mechanism, so that the wiring harness group and the pressure relief mechanism can form an avoidance. When the battery cell is depressurized, the direct impact of the emissions discharged through the pressure relief mechanism on the wiring harness group can be reduced, thereby reducing the impact of the battery cell on the wiring harness group when the pressure is released, thereby improving the reliability of the battery device.

[0027] In some embodiments, the acquisition component includes a temperature detection component, the wiring harness group includes multiple wiring harnesses, the multiple wiring harnesses include a first wiring harness, and the first wiring harness is electrically connected to the temperature detection component; the first wiring harness includes a first extension section and a first bending section, the first extension section extends along a first direction, the temperature detection component is located on one side of the first extension section along a third direction, the first bending section connects the first extension section and the temperature detection component, and the first direction, the second direction and the third direction are perpendicular to each other.

[0028] In the above embodiment, by disposing the first bending section, the first extending section can be smoothly electrically connected to the temperature detecting element.

[0029] In some embodiments, the first bending section includes a first connecting portion and a second connecting portion, the first connecting portion connects the first extension section and the second connecting portion, the second connecting portion connects the temperature detecting element, and the second connecting portion is arranged opposite to the first extension section along a third direction.

[0030] In the above embodiment, the first connecting portion and the second connecting portion have different extension directions respectively, which can enable the first wiring harness to at least have good tensile strength, thereby reducing the connection break between the wiring harness group and the temperature detection component caused by the vibration of the battery device, thereby improving the reliability of the battery device.

[0031] In some embodiments, the first bending section further includes a third connecting portion, the third connecting portion extends along a third direction, and the second connecting portion is connected to the temperature detecting component through the third connecting portion.

[0032] In the above embodiment, the provision of the third connecting portion can facilitate the arrangement of the first wiring harness and can also make the first wiring harness have good tensile strength, thereby reducing the possibility of connection breakage between the wiring harness group and the temperature detection component caused by vibration of the battery device, thereby improving the reliability of the battery device.

[0033] In some embodiments, the battery device also includes a busbar, which electrically connects at least two battery cells. The wiring harness group includes multiple wiring harnesses, the multiple wiring harnesses include a second wiring harness, and the second wiring harness is electrically connected to the busbar; the second wiring harness includes a second extension section and a second bending section, the second extension section extends along a first direction, the busbar is located on one side of the second extension section along a third direction, and the second bending section connects the second extension section and the busbar.

[0034] In the above embodiment, by disposing the second bending section, the second extending section can be smoothly electrically connected to the busbar.

[0035] In some embodiments, the second bending section includes a fourth connecting portion and a fifth connecting portion, the fourth connecting portion connects the second extension section and the fifth connecting portion, the fifth connecting portion connects the bus bar, the fifth connecting portion is arranged relative to the second extension section along a third direction, and the first direction, the second direction and the third direction are perpendicular to each other.

[0036] In the above embodiment, the fourth connection portion and the fifth connection portion have different extension directions respectively, which can enable the second wiring harness to have good tensile strength, thereby reducing the connection break between the second wiring harness and the busbar caused by vibration of the battery device, thereby improving the reliability of the battery device.

[0037] In some embodiments, the second bending section further includes a sixth connecting portion, the sixth connecting portion extends along the third direction, and the fifth connecting portion is connected to the busbar through the sixth connecting portion.

[0038] In the above embodiment, the setting of the sixth connecting portion can facilitate the arrangement of the second wiring harness and can also make the second wiring harness have good tensile strength, thereby reducing the connection break between the wiring harness group and the busbar caused by the vibration of the battery device, thereby improving the reliability of the battery device.

[0039] In some embodiments, the battery cell includes a first electrode terminal and a second electrode terminal with opposite polarities, the first electrode terminal and the second electrode terminal are arranged on the first wall, there are two wiring harness groups, the second wiring harness of one wiring harness group is electrically connected to the first electrode terminal through a bus, and the second wiring harness of the other wiring harness group is electrically connected to the second electrode terminal through another bus.

[0040] In the above embodiment, the two wiring harness groups are connected to the first electrode terminal and the second electrode terminal of the battery cell with opposite polarities through two busbars, so that the collection component and the battery cell can form a loop to facilitate the collection component to obtain partial information of the battery cell.

[0041] In some embodiments, the acquisition component further includes a connector, and the two harness groups have a collection area, and the collection area is connected to the connector.

[0042] In the above embodiment, a gathering area is provided for the two wiring harness groups to facilitate the arrangement of the outgoing wires of the two wiring harness groups, thereby making the connection with the connector more convenient.

[0043] In some embodiments, the battery device also includes a busbar and a temperature detector. The busbar electrically connects at least two battery cells. The busbar is located on the side of the first wall away from the second wall. The temperature detector is electrically connected to the wiring harness assembly and is used to detect the temperature of the busbar.

[0044] In the above embodiment, the busbar electrically connects at least two battery cells, and the battery cells and the busbar have a solid connection, and the two have a high efficiency of heat transfer. When the temperature detection element detects the temperature of the battery cell, in order to facilitate the arrangement in the battery device, the temperature of the battery cell can be collected by detecting the temperature of the busbar.

[0045] In some embodiments, the busbar includes a buffer portion and two busbars, the two busbars are arranged along a first direction and are respectively connected to two battery cells, the buffer portion connects the two busbars, the buffer portion protrudes from the surface of the busbar away from the first wall along a second direction, and in a projection plane perpendicular to the first direction, at least part of the positive projection of the buffer portion overlaps at least partly with the positive projection of the temperature detection element.

[0046] In the above embodiment, by providing a buffer portion on the busbar, the expansion force of the battery cell can be absorbed. On this basis, the orthographic projection of the temperature detection member in the projection plane perpendicular to the first direction is at least partially overlapped with the orthographic projection of the buffer portion, which can reduce the space occupied in the second direction caused by the provision of the temperature detection member.

[0047] In some embodiments, the buffer portion has a receiving groove, and the temperature detecting element is at least partially located in the receiving groove.

[0048] In the above embodiment, a receiving groove is provided to place the temperature detecting element, which can facilitate the fixation of the temperature detecting element and reduce the influence caused by the relative movement of the temperature detecting element.

[0049] In some embodiments, the battery device also includes a bus and an insulating member, the protective member is fixedly connected to the wiring harness group, the bus electrically connects at least two battery cells, the insulating member is located on the side of the first wall facing away from the second wall, and the bus and the protective member are connected to the surface of the insulating member facing away from the first wall.

[0050] In the above embodiment, the reliability of the battery device is also improved by providing a protective member, and positioning the protective member with the wiring harness group can facilitate the arrangement of the wiring harness group and reduce the relative displacement of the wiring harness group and the components connected thereto, thereby improving the connection reliability of the wiring harness group.

[0051] In a second aspect, an embodiment of the present application provides an electrical device, comprising a battery device provided by any embodiment of the first aspect.

[0052] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0053] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0054] Figure 1 A schematic diagram of the structure of a vehicle provided in some embodiments of the present application;

[0055] Figure 2 A schematic diagram of the exploded structure of a battery device provided in some embodiments of the present application;

[0056] Figure 3 A schematic diagram of the connection structure between a battery cell and a busbar provided in some embodiments of the present application;

[0057] Figure 4 A schematic diagram of the exploded structure of a battery cell provided in some embodiments of the present application;

[0058] Figure 5 A schematic diagram of the structure of a battery cell assembly provided in some embodiments of the present application;

[0059] Figure 6 A schematic diagram of the structure of a battery device provided in some embodiments of the present application;

[0060] Figure 7 A schematic diagram of the structure of a battery device provided for some embodiments of the present application (showing a battery cell, a wiring harness assembly and a protective member);

[0061] Figure 8 A schematic diagram of the structure of a battery device provided for some other embodiments of the present application (showing a battery cell, a wiring harness assembly and a protective member);

[0062] Fig. 9 A schematic diagram of the structure of a battery device provided for some other embodiments of the present application (showing a battery cell, a wiring harness assembly and a protective member);

[0063] Fig.10 for Figure 6 A local enlarged view at point A;

[0064] Fig.11 A schematic diagram of the structure of a battery device provided in some embodiments of the present application (protective components hidden);

[0065] Fig.12 for Fig.11 A local enlarged view at point B;

[0066] Fig.13 for Fig.11A partial enlarged view at C;

[0067] Fig.14 for Fig.11 A local enlarged view at D;

[0068] Fig.15 A schematic diagram of the exploded structure of a battery device provided in some embodiments of the present application;

[0069] icon:

[0070] 1000-vehicle; 100-battery device; 200-controller; 300-motor; 10-box; 11-first box; 12-second box; 20-battery cell; 201-electrode terminal; 202-housing; 2021-shell; 2022-end cover; 203-electrode assembly; 30-battery cell assembly; 40-confluence piece; 204-pressure relief mechanism; 205-first wall; 206-second wall; 401-buffer; 402-confluence piece; 50-collection assembly; 501-wiring harness group; 5011-first wiring harness; 50111-first extension section; 50112-second wiring harness A bending section; 501121-a first connection portion; 501122-a second connection portion; 501123-a third connection portion; 5012-a second wiring harness; 50121-a second extension section; 50122-a second bending section; 501221-a fourth connection portion; 501222-a fifth connection portion; 501223-a sixth connection portion; 502-a connector; 60-a protective member; 601-a first protective member; 602-a second protective member; 603-a third protective member; 604-an opening; 70-a temperature detecting member; 80-an insulating member; X-a first direction; Y-a second direction; Z-a third direction. DETAILED DESCRIPTION

[0071] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0072] Unless otherwise defined, all technical and scientific terms used in this application have the same meanings as those commonly understood by technicians in the technical field of this application; the terms used in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned drawings and any variations thereof are intended to cover non-exclusive inclusions. The terms "first", "second", etc. in the specification and claims of this application or the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order or a primary and secondary relationship.

[0073] Reference to "embodiment" in this application means that a particular feature, structure, or characteristic described in conjunction with the embodiment may be included in at least one embodiment of the present application. The appearance of the phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments.

[0074] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", and "attached" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0075] The term "and / or" in this application is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this application generally indicates that the associated objects before and after are in an "or" relationship.

[0076] In the embodiments of the present application, the same reference numerals represent 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 the present application shown in the drawings, as well as the overall thickness, length, width and other dimensions of the integrated device are only exemplary descriptions and should not constitute any limitation to the present application.

[0077] The term “plurality” used in this application refers to two or more (including two).

[0078] In the embodiment of the present application, the battery cell may be a secondary battery. A secondary battery refers to a battery cell that can be continuously used by activating active materials by charging after the battery cell is discharged.

[0079] Battery cells include, but are not limited to, lithium-ion batteries, sodium-ion batteries, sodium-lithium-ion batteries, lithium metal batteries, sodium metal batteries, lithium-sulfur batteries, magnesium-ion batteries, nickel-hydrogen batteries, nickel-cadmium batteries, lead-acid batteries, and the like.

[0080] In some embodiments, the battery cell may include a housing. The housing is used to encapsulate components such as the electrode assembly and the electrolyte. The housing may be a steel housing, an aluminum housing, a plastic housing (such as polypropylene), a composite metal housing (such as a copper-aluminum composite housing), or an aluminum-plastic film.

[0081] As an example, the battery cell may be a cylindrical battery cell, a prismatic battery cell, a soft-pack battery cell or a battery cell of other shapes. The prismatic battery cell includes a square-shell battery cell, a blade-shaped battery cell, a polygonal battery cell, such as a hexagonal battery cell.

[0082] The battery apparatus mentioned in the embodiments of the present application may include one or more battery cell assemblies for providing voltage and capacity. The battery cell assembly may include multiple battery cells, which are connected in series, in parallel or in mixed connection through a busbar.

[0083] In some embodiments, a battery cell assembly is generally formed by arranging a plurality of battery cells; as an example, the battery cell assembly may be a battery module, which is formed by arranging and fixing a plurality of battery cells to form an independent module.

[0084] As an example, a battery module may be formed by bundling a plurality of battery cells by cable ties.

[0085] In some embodiments, the battery device may be a battery pack, which may include a case and one or more battery cell assemblies, wherein the battery cell assemblies are accommodated in the case.

[0086] As an example, the battery cell assembly may be a battery module, and the battery cell assembly may be accommodated in the box by fixing the battery module in the box.

[0087] As an example, the battery cell assembly may also be housed in the case by directly fixing a plurality of battery cells to the case.

[0088] As an example, the box may include a first box and a second box. The first box and the second box are buckled together to form a closed space inside the box to accommodate the battery cell assembly. The closed here means covered or closed, which can be sealed or unsealed. The first box can be a top cover or a bottom plate.

[0089] As an example, the box body may include a top cover, a frame and a bottom plate. The top cover and the bottom plate are respectively connected to the frame, so that a closed space is formed inside the box body to accommodate the battery cell assembly.

[0090] As an example, the box body can be used as a part of the chassis structure of the vehicle. For example, the top cover of the box body can become at least a part of the floor of the vehicle, or the frame of the box body can become at least a part of the cross beam and longitudinal beam of the vehicle.

[0091] In some embodiments, the battery device refers to an energy storage device, which includes a box body, at least one side of which is provided with a door. The energy storage device includes an energy storage container, an energy storage cabinet, and the like.

[0092] In order to improve the reliability of the battery device, the information of the battery cell, such as the voltage, current, temperature, etc. of the battery cell, can be collected by the collection component, so as to make corresponding adjustments to the battery device based on the information of the battery cell. The collection component may include a wiring harness group, which is used to achieve electrical connection. In addition, for the sake of the reliability of the battery device, a pressure relief mechanism can also be provided on the outer shell of the battery cell to relieve pressure to release the internal pressure or temperature when the internal pressure or temperature or other conditions of the battery cell reach a predetermined threshold.

[0093] When a collection component and a pressure relief mechanism are provided in the battery device, the emissions discharged when the pressure relief mechanism releases pressure may cause damage to the wiring harness group. When the wiring harness group is damaged, the collection component may fail and a short circuit may occur in the battery device, thereby reducing the reliability of the battery device and even causing the battery device to fail in severe cases.

[0094] In view of this, an embodiment of the present application provides a battery device, including a battery cell assembly, a collection assembly and a protective member, wherein the battery cell assembly includes a plurality of battery cells arranged along a first direction, the battery cells include a housing and a pressure relief mechanism, the housing includes a first wall and a second wall arranged opposite to each other along a second direction, the pressure relief mechanism is arranged on the first wall, and the first direction is perpendicular to the second direction. The collection assembly is configured to collect information of the battery cells, the collection assembly includes at least one wiring harness group, and at least a portion of the wiring harness group is arranged on a side of the first wall away from the second wall. The protective member is configured to protect the wiring harness group, and along the second direction, the protective member is at least partially located on a side of the wiring harness group away from the first wall.

[0095] In such a battery device, the protective member is at least partially located on the side of the wiring harness group away from the first wall, which can reduce the emissions discharged through the pressure relief mechanism from contacting the wiring harness group from the side of the wiring harness group away from the first wall and affecting the wiring harness group, thereby improving the reliability of the battery device.

[0096] The technical solutions described in the embodiments of the present application are applicable to various electrical devices using battery cells and battery devices, such as mobile phones, portable devices, laptop computers, electric vehicles, electric toys, electric tools, vehicles, ships and spacecraft, for example, spacecraft include airplanes, rockets, space shuttles and spacecraft, etc.

[0097] For the convenience of description, the following embodiments are described by taking the electric device as a vehicle as an example.

[0098] Please refer to Figure 1 , Figure 1 The schematic diagram of the structure of the vehicle 1000 provided in some embodiments of the present application. The vehicle 1000 is provided with a battery device 100 inside, and the battery device 100 can be provided at the bottom, head or tail of the vehicle 1000. The battery device 100 can be used to power the vehicle 1000, for example, the battery device 100 can be used as an operating power source of the vehicle 1000.

[0099] The vehicle 1000 may further include a controller 200 and a motor 300 , wherein the controller 200 is used to control the battery device 100 to supply power to the motor 300 , for example, to meet the power requirements of starting, navigating, and driving the vehicle 1000 .

[0100] In some embodiments of the present application, the battery device 100 can not only serve as an operating power source for the vehicle 1000, but also serve as a driving power source for the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000.

[0101] Please refer to Figure 2 , Figure 2 Schematic diagram of the exploded structure of a battery device 100 according to some embodiments of the present application. The battery device 100 may include a battery cell 20 and a box 10 . The box 10 is used to accommodate the battery cell 20 .

[0102] Among them, a closed space for accommodating the battery cell 20 is formed inside the box 10, and the box 10 can adopt a variety of structures. In some embodiments, the box 10 may include a first box 11 and a second box 12, and the first box 11 and the second box 12 are buckled with each other. The first box 11 and the second box 12 can be in various shapes, such as a cuboid, a cylinder, etc. The first box 11 can be a hollow structure with one side open, and the second box 12 can also be a hollow structure with one side open. The open side of the second box 12 is buckled with the open side of the first box 11 to form a box 10 with a closed space. It is also possible that the first box 11 is a hollow structure with one side open, and the second box 12 is a plate-like structure. The second box 12 is buckled on the open side of the first box 11, so as to form a box 10 with a accommodating space 101.

[0103] In the battery device 100, there may be one or more battery cells 20. If there are more than one battery cell 20, the battery cells 20 may be connected in series, in parallel, or in a mixed connection. A mixed connection means that the battery cells 20 are connected in series and in parallel. A battery module may be formed by connecting a plurality of battery cells 20 in series, in parallel, or in a mixed connection, and then the plurality of battery modules are connected in series, in parallel, or in a mixed connection to form a whole and accommodated in the box 10. Alternatively, all the battery cells 20 may be directly connected in series, in parallel, or in a mixed connection, and then the whole formed by all the battery cells 20 is accommodated in the box 10.

[0104] In some embodiments, please refer to Figure 3 , Figure 3 The schematic diagram of the connection structure between the battery cell 20 and the busbar 40 of some embodiments of the present application, the battery device 100 may further include a busbar 40, and multiple battery cells 20 may be electrically connected through the busbar 40 to achieve series connection, parallel connection or mixed connection of multiple battery cells 20. The busbar 40 may be a metal conductor, such as copper, iron, aluminum, stainless steel, aluminum alloy, etc.

[0105] In some embodiments, please refer to Figure 4 , Figure 4 This is a schematic diagram of the exploded structure of a battery cell 20 in some embodiments of the present application. The battery cell 20 may include a housing 202 and an electrode assembly 203 , wherein the electrode assembly 203 is accommodated in the housing 202 .

[0106] In some embodiments, the housing 202 may include a shell 2021 and an end cap 2022, wherein the shell 2021 has an opening, and the end cap 2022 closes the opening of the shell 2021. The closing here means covering or closing, which may be sealed or unsealed.

[0107] The shell 2021 is a component for accommodating the electrode assembly 203. The shell 2021 may be a hollow structure with an opening formed at one end, or a hollow structure with openings formed at opposite ends. The shell 2021 may be in various shapes, such as a cylindrical shape, a rectangular parallelepiped shape, etc. The material of the shell 2021 may be various, such as copper, iron, aluminum, steel, aluminum alloy, etc. The electrode assembly 203 may be partially located in the shell 2021, or may be completely located in the shell 2021.

[0108] The end cap 2022 and the shell 2021 together define a receiving space for accommodating the electrode assembly 203 and other components. The end cap 2022 can be connected to the shell 2021 by welding, crimping, etc. to close the opening of the shell 2021. The shape of the end cap 2022 can be adapted to the shape of the shell 2021. For example, the shell 2021 is a rectangular parallelepiped structure, and the end cap 2022 is a rectangular plate structure adapted to the shell 2021. For another example, the shell 2021 is a cylindrical structure, and the end cap 2022 is a circular plate structure adapted to the shell 2021. The material of the end cap 2022 can also be a variety of materials, such as copper, iron, aluminum, steel, aluminum alloy, etc. The material of the end cap 2022 and the shell 2021 can be the same or different.

[0109] In the embodiment where the housing 2021 is opened at one end, one end cap 2022 may be provided. In the embodiment where the housing 2021 is opened at two opposite ends, two end caps 2022 may be provided, and the two end caps 2022 respectively close two ends of the housing 2021, and the two end caps 2022 and the housing 2021 together define a receiving space.

[0110] In some embodiments, the battery cell 20 may further include an electrode terminal 201, which is disposed on the housing 202, and is used to electrically connect to the tab of the electrode assembly 203 to input or output the electrical energy of the battery cell 20. The electrode terminal 201 may be disposed on the shell 2021 of the housing 202, or on the end cover 2022 of the housing 202. Electrode terminals 201 of different polarities of a battery cell 20 may be disposed on the same side of the housing 202, or on different sides of the housing 202. The electrode terminal 201 and the tab may be directly connected, for example, the electrode terminal 201 and the tab are welded. The electrode terminal 201 and the tab may also be indirectly connected, for example, the electrode terminal 201 and the tab are indirectly connected through a current collecting member. The current collecting member may be a metal conductor, such as copper, iron, aluminum, steel, aluminum alloy, etc.

[0111] As an example, in Figure 4 In the illustrated embodiment, one end of the shell 2021 is formed, and there is one end cap 2022 in the shell 202, and one end cap 2022 closes one of the shells 2021. Two electrode terminals 201 are provided on the end cap 2022, and the two electrode terminals 201 are respectively a positive electrode terminal 201 and a negative electrode terminal 201. A positive electrode tab and a negative electrode tab are formed at one end of the electrode assembly 203 facing the end cap 2022, and the positive electrode terminal 201 is electrically connected to the positive electrode tab, and the negative electrode terminal 201 is electrically connected to the negative electrode tab.

[0112] The present application embodiment provides a battery device 100, see Figure 5-Figure 7 , Figure 5A schematic diagram of the structure of a battery cell assembly 30 provided in some embodiments of the present application; Figure 6 A schematic diagram of the structure of a battery device 100 provided in some embodiments of the present application; Figure 7 A schematic diagram of the structure of a battery device 100 provided for some embodiments of the present application (showing a battery cell 20, a wiring harness group 501 and a protective member 60). The battery cell assembly 30, a collection assembly 50 and a protective member 60 are included. The battery cell assembly 30 includes a plurality of battery cells 20 arranged along a first direction X. The battery cell 20 includes a housing 202 and a pressure relief mechanism 204. The housing 202 includes a first wall 205 and a second wall 206 arranged opposite to each other along a second direction Y. The pressure relief mechanism 204 is arranged on the first wall 205. The first direction X is perpendicular to the second direction Y. The collection assembly 50 is configured to collect information of the battery cell 20. The collection assembly 50 includes at least one wiring harness group 501. At least a portion of the wiring harness group 501 is arranged on a side of the first wall 205 away from the second wall 206. The protective member 60 is configured to protect the wiring harness group 501. Along the second direction Y, the protective member 60 is at least partially located on a side of the wiring harness group 501 away from the first wall 205.

[0113] The pressure relief mechanism 204 is an element or component that releases pressure to release the internal pressure or temperature when the internal pressure or temperature or other conditions of the battery cell 20 reaches a predetermined threshold. The threshold design varies according to different design requirements. The threshold may depend on one or more materials of the positive electrode plate, negative electrode plate, electrolyte and isolation membrane in the battery cell 20. The pressure relief mechanism 204 can take the form of an explosion-proof valve, an air valve, a pressure relief valve or a safety valve, and can specifically adopt a pressure-sensitive or temperature-sensitive element or structure, that is, when the internal pressure or temperature or other conditions of the battery cell 20 reaches a predetermined threshold, the pressure relief mechanism 204 performs an action or a weak structure provided in the pressure relief mechanism 204 is destroyed, thereby forming a channel or passage for internal pressure or temperature release. Generally, the melting point and / or thickness of the weak structure are lower than other areas of the pressure relief mechanism 204. For example, the weak structure can be a notched groove set on the surface of the pressure relief mechanism 204.

[0114] The housing 202 may include a plurality of walls, which together enclose a space for accommodating the electrode assembly 203 , and the plurality of walls include at least a first wall 205 and a second wall 206 , which are arranged opposite to each other along the second direction Y. For example, when the housing 202 includes a shell 2021 and an end cover 2022 , when the pressure relief mechanism 204 is arranged on the end cover 2022 , the first wall 205 is located on the end cover 2022 , and the second wall 206 is located on the shell 2021 .

[0115] The acquisition component 50 can be used to acquire voltage information, current information, temperature information, etc. of the battery cell 20 , and can also be used to acquire temperature information, etc. of other components or any area in the battery device 100 .

[0116] The acquisition component 50 may include one wiring harness group 501 or multiple wiring harness groups 501, each wiring harness group 501 may include multiple wiring harnesses, and the multiple wiring harnesses may be interconnected or separately arranged. The wiring harness may include a metal conductor and an insulating layer, and the insulating layer is coated on the surface of the metal conductor. If multiple wiring harnesses are interconnected, the insulating layers of the multiple wiring harnesses may be interconnected. As an example, the insulating layers of the multiple wiring harnesses are integrally formed; if multiple wiring harnesses are separately arranged, the insulating layers of the multiple wiring harnesses may be independent of each other and not connected together.

[0117] The wiring harness group 501 is at least partially arranged on the side of the first wall 205 facing away from the second wall 206. The part of the wiring harness group 501 arranged on the side of the first wall 205 facing away from the second wall 206 can be placed on the surface of the first wall 205 and in contact with the first wall 205, or can be spaced apart from the first wall 205, for example, the wiring harness group 501 of this part is placed on other components so that the wiring harness group 501 of this part is spaced apart from the first wall 205.

[0118] The protective member 60 is used to protect the wiring harness group 501 . The protective member 60 can protect the wiring harness group 501 by shielding, thereby reducing the impact of the emissions discharged through the pressure relief mechanism 204 on the wiring harness group 501 .

[0119] The protective member 60 is located at the side of the wiring harness group 501 away from the first wall 205. This part of the protective member 60 can completely block the side of the wiring harness group 501 away from the first wall 205, or this part of the protective member 60 can partially block the side of the wiring harness group 501 away from the first wall 205.

[0120] The protective member 60 can be made of ordinary materials to protect relatively moving objects in the battery device 100, so as to reduce the impact of the objects contacting the wiring harness group 501 on the wiring harness group 501; the protective member 60 can also be made of a material with a high melting point to reduce the impact of objects moving and having a high temperature in the battery device 100 on the wiring harness group 501. For example, when the pressure relief mechanism 204 is relieving pressure, the emissions discharged by the pressure relief mechanism 204 will move in the box 10 and may contact the wiring harness group 501. At this time, the protective member 60 is made of a material with a certain melting point, which can better protect the wiring harness group 501.

[0121] The protective member 60 may be made of insulating material or non-insulating material, such as metal. When the protective member 60 is made of non-insulating material, it is necessary to reduce the contact between the protective member 60 and other conductive components, or to provide an insulating layer between the protective member 60 and other components that are in direct contact with the protective member 60, so as to reduce the situation where the protective member 60 is electrically connected to other components.

[0122] In the projection plane perpendicular to the second direction Y, the orthographic projection of the wiring harness group 501 and the orthographic projection of the pressure relief mechanism 204 may overlap, partially overlap, or not overlap. The smaller the overlapping portion of the orthographic projection of the wiring harness group 501 and the orthographic projection of the pressure relief mechanism 204 is, the smaller the direct impact of the pressure relief mechanism 204 on the wiring harness group 501 is when relieving pressure.

[0123] When collecting the temperature of the battery device 100, the collection component 50 may also be provided with a temperature detection component 70, and then the temperature detection component 70 is arranged at a position where the temperature needs to be detected, and is electrically connected to the wiring harness group 501. When the collection component 50 collects the current or voltage information of the battery cell 20, the wiring harness group 501 in the collection component 50 may be directly electrically connected to the battery cell 20, or the wiring harness group 501 in the collection component 50 may be electrically connected to the battery cell 20 through other components. For example, when the battery device 100 includes a busbar 40, the wiring harness group 501 in the collection component 50 may be electrically connected to the battery cell 20 through the busbar 40.

[0124] In the above embodiment, the protective member 60 is at least partially located on the side of the wiring harness group 501 away from the first wall 205, which can reduce the contact and impact of the emissions discharged from the battery device 100 through the pressure relief mechanism 204 with the wiring harness group 501 from the side of the wiring harness group 501 away from the first wall 205, thereby improving the reliability of the battery device 100.

[0125] Exemplarily, when the pressure relief mechanism is releasing pressure, the emissions discharged through the pressure relief mechanism 204 will move in the box body 10 and cause backflow due to the obstruction of other components. The backflow emissions are more likely to contact the side of the wiring harness group 501 away from the first wall 205. At this time, the protective member 60 arranged on the side of the wiring harness group 501 away from the first wall 205 can better block the backflow emissions from directly contacting the wiring harness group 501, thereby reducing the impact on the wiring harness group 501.

[0126] In some embodiments, please refer to Figure 8 , Figure 8A schematic diagram of the structure of a battery device 100 provided for other embodiments of the present application (showing a battery cell 20, a wiring harness group 501, and a protective member 60). The protective member 60 includes a first protective portion 601 and a second protective portion 602 connected to each other, the first protective portion 601 is located on a side of the wiring harness group 501 away from the first wall 205, and the second protective portion 602 is arranged opposite to the wiring harness group 501 along the third direction Z, and the first direction X, the second direction Y, and the third direction Z are perpendicular to each other.

[0127] The protective member 60 may include multiple protective parts, each protective part protects one side of the wiring harness group 501. When the protective member 60 includes multiple protective parts, the protective member 60 may include a first protective part 601 and a second protective part 602, and the first protective part 601 and the second protective part 602 are different parts of the protective member 60 respectively.

[0128] The first protection portion 601 and the second protection portion 602 may be integrally formed or assembled. For example, the first protection portion 601 and the second protection portion 602 may be connected by bolts, welding, etc.

[0129] In the above embodiment, the first protection part 601 can protect the side of the wiring harness group 501 away from the first wall 205, and the second protection part 602 can protect the side of the wiring harness group 501 along the third direction Z, thereby improving the protection performance of the wiring harness group 501. Taking the battery cell 20 as an example, the first wall 205 of the battery cell 20 is the top wall, and the second wall 206 is the bottom wall. When the pressure relief mechanism 204 releases pressure, high-temperature gas and some other solid particles will be discharged. After being discharged, the solid particles may be blocked and fall again when passing through the inner wall of the box body 10. At this time, the first protection part 601 can reduce the free fall of solid particles onto the wiring harness group 501. When the pressure relief mechanism 204 releases pressure, the discharged solid particles may be blocked and rebound in directions other than the gravity direction. The solid particles may also contact the wiring harness group 501 from the side of the wiring harness group 501. At this time, the second protection part 602 can reduce the rebounding particles from contacting the wiring harness group 501.

[0130] In some embodiments, still refer to Figure 8 In the projection plane perpendicular to the second direction Y, the orthographic projection of the second protecting portion 602 is located along the third direction Z between the orthographic projection of the pressure relief mechanism 204 and the orthographic projection of the wiring harness group 501 .

[0131] In the above embodiment, the second protection part 602 is arranged on the side of the wiring harness group 501 close to the pressure relief mechanism 204, which can reduce the impact of the emissions discharged by the pressure relief mechanism 204 on the wiring harness group 501 from this side. In a specific application scenario, when the pressure relief mechanism 204 releases pressure, the discharged emissions are more likely to contact the wiring harness group 501 from the side of the wiring harness group 501 close to the pressure relief mechanism 204 and cause an impact, and the temperature of the solid particles or gas contacting the wiring harness group 501 from this side is higher, and the impact is greater. In this embodiment, by setting the second protection part 602 between the pressure relief mechanism 204 and the wiring harness group 501, the protection performance of the protective member 60 on the wiring harness group 501 can be improved, thereby improving the reliability of the battery device 100.

[0132] In some embodiments, please refer to Fig. 9 , Fig. 9 A schematic diagram of the structure of a battery device 100 provided in some other embodiments of the present application (showing a battery cell 20, a wiring harness group 501 and a protective member 60). The protective member 60 further includes a third protective portion 603, which is connected to the second protective portion 602. Along the second direction Y, the third protective portion 603 is arranged opposite to the first protective portion 601, and the third protective portion 603 is located on the side of the wiring harness group 501 facing the first wall 205.

[0133] There may be flowing gas or liquid on the first wall 205 of the battery cell 20. At this time, the flowing gas or liquid will flow along the side of the protective member 60 facing the first wall 205 and come into contact with the wiring harness group 501, thereby affecting the wiring harness group 501. For example, when the pressure relief mechanism 204 releases pressure, the discharged emissions may include flowing gas and liquid, and the flowing gas and liquid may flow along the side of the protective member 60 facing the first wall 205 and come into contact with the wiring harness group 501. In view of this, in the above embodiment, the third protective portion 603 is provided to reduce the impact of the flowing gas or liquid on the first wall 205 on the wiring harness group 501, so as to improve the reliability of the battery device 100.

[0134] In some embodiments, still refer to Fig. 9 Along the third direction Z, the protective member 60 has an opening 604 on a side opposite to the second protective portion 602 ; the wiring harness group 501 includes a plurality of wiring harnesses, and a portion of at least one wiring harness extends to the outside of the protective member 60 through the opening 604 .

[0135] In the above embodiment, the second protection portion 602 connects the first protection portion 601 and the third protection portion 603, and the first protection portion 601 and the third protection portion 603 are arranged relatively to each other along the second direction Y, and the second protection portion 602 is located on one side of the wiring harness group 501 along the third direction Z, and can form an enclosure structure having an opening 604 on one side facing the third direction Z. Part of the wiring harness group 501 is located in the enclosure structure, and the enclosure structure can protect the wiring harness group 501, and the wiring harness group 501 extends to the outside of the protective member 60 through the opening 604, and can achieve electrical connection with other components.

[0136] In some embodiments, please refer back to Figure 6 , and see further Fig.10 , Fig.10 for Figure 6 A partial enlarged view at A. The acquisition assembly 50 includes a temperature detection member 70 , and the plurality of wire harnesses include a first wire harness 5011 . Part of the first wire harness 5011 extends outside the protective member 60 through the opening 604 and is electrically connected to the temperature detection member 70 .

[0137] According to the specific functions of the acquisition component 50, a wiring harness may be specifically set. When the acquisition component 50 needs to measure temperature, the multiple wiring harnesses may include a first wiring harness 5011, which is a wiring harness electrically connected to the temperature detection element 70. The first wiring harness 5011 may be one or more. The wiring harnesses of the acquisition component 50 may all be the first wiring harness 5011, for example, the acquisition component 50 only realizes the temperature measurement function; or only part of the wiring harnesses of the acquisition component 50 may be the first wiring harness 5011.

[0138] The temperature detection element 70 may be an NTC thermistor or a PTC thermistor.

[0139] In the above embodiment, by providing the temperature detection element 70 and protecting the portion of the first wiring harness 5011 connected to the temperature detection element 70 , the temperature of the battery cell 20 can be detected, while the risk of damage to the first wiring harness 5011 can be reduced, thereby improving the reliability of the battery device 100 .

[0140] In some embodiments, still refer to Figure 5 and Fig.10 The plurality of wire harnesses include a second wire harness 5012 , a portion of which extends outside the protective member 60 through the opening 604 and is electrically connected to the battery cell 20 .

[0141] Among the multiple wire harnesses, all of the wire harnesses may be the second wire harness 5012 , or some of the wire harnesses may be the second wire harness 5012 .

[0142] The second wiring harness 5012 is electrically connected to the battery cell 20 . The second wiring harness 5012 may be directly connected to the battery cell 20 , or the second wiring harness 5012 may be connected to the battery cell 20 through other components. For example, when the battery device 100 includes a busbar 40 , the second wiring harness 5012 is electrically connected to the battery cell 20 through the busbar 40 .

[0143] In the above embodiment, by providing the protection member 60 to protect the portion of the second wire harness 5012 connected to the battery cell 20 , the risk of damage to the second wire harness 5012 can be reduced, thereby improving the reliability of the battery device 100 .

[0144] In some embodiments, still refer to Figure 5 and Fig.10 The battery device 100 also includes a busbar 40, which electrically connects at least two battery cells 20. The busbar 40 is located on the side of the first wall 205 that is away from the second wall 206. In a projection plane perpendicular to the second direction Y, the orthographic projection of the protective member 60 is located between the orthographic projection of the pressure relief mechanism 204 and the orthographic projection of the busbar 40 along the third direction Z. The opening 604 is set toward the busbar 40, and the second wiring harness 5012 is electrically connected to the battery cell 20 through the busbar 40.

[0145] The busbar 40, also known as a busbar or a busbar, is a component used to connect multiple battery cells 20 in series and parallel. The material of the busbar 40 can be copper, aluminum, aluminum alloy, nickel and other metal materials and composite materials thereof. The busbar 40 in the battery device 100 can be one or more. When there are two battery cells 20, the busbar 40 can be set as one, and one busbar 40 connects two battery cells 20 to form a whole; when there are more than two battery cells 20, the busbar 40 can be set as multiple, and one busbar 40 connects at least two battery cells 20 to form a whole. The two battery cells 20 electrically connected to the busbar 40 can be arranged adjacent to each other or non-adjacent to each other. For example, the multiple battery cells 20 in the battery cell assembly 30 are arranged along the first direction X, and the multiple battery cells 20 include the first battery cell 20, the second battery cell 20 and the third battery cell 20 that are adjacently arranged, and the second battery cell 20 is arranged between the first battery cell 20 and the third battery cell 20. The busbar 40 may connect the electrode terminal 201 of the first battery cell 20 with the electrode terminal 201 of the second battery cell 20 to realize that the busbar 40 electrically connects the two adjacent battery cells 20; the busbar 40 may connect the electrode terminal 201 of the first battery cell 20 with the electrode terminal 201 of the third battery cell 20 to realize that the busbar 40 electrically connects the two non-adjacent battery cells 20. The polarities of the electrode terminals 201 of the two battery cells 20 connected to the same busbar 40 may be the same or opposite. If the polarities of the electrode terminals 201 of two batteries connected to the same bus 40 are the same, the bus 40 can realize the parallel connection of the two battery cells 20; if the polarities of the electrode terminals 201 of two batteries connected to the same bus 40 are different, the bus 40 can realize the series connection of the two battery cells 20.

[0146] In the projection plane perpendicular to the second direction Y, the orthographic projection of the protective member 60 is located between the orthographic projection of the pressure relief mechanism 204 and the orthographic projection of the conduit 40 along the third direction Z. The orthographic projection of the protective member 60 may be partially located between the orthographic projection of the pressure relief mechanism 204 and the orthographic projection of the conduit 40, while the remaining part overlaps with the orthographic projection of the pressure relief mechanism 204 and / or the orthographic projection of the conduit 40; or the orthographic projection of the protective member 60 may be located between the orthographic projection of the pressure relief mechanism 204 and the orthographic projection of the conduit 40.

[0147] In the above embodiment, the busbar 40 connects at least two battery cells 20, and the second wire harness 5012 is electrically connected to the battery cell 20 through the busbar 40, so that information of at least two battery cells 20 can be obtained at the same time on the basis of setting a connection point, and the number of wire harness groups 501 in the acquisition component 50 can be reduced. In the projection plane perpendicular to the second direction Y, the orthographic projection of the protective member 60 is located between the orthographic projection of the pressure relief mechanism 204 and the orthographic projection of the busbar 40 along the third direction Z, so that the protective member 60 and the wire harness group 501 located inside the protective member 60 can be placed in a better position, because the busbar 40 has a certain thickness in the second direction Y, so the protective member 60 set in this way can reduce the space occupied in the second direction Y, thereby improving the energy density of the battery device 100. The opening 604 formed by the protective member 60 is arranged toward the busbar 40, and the second wiring harness 5012 is electrically connected to the battery cell 20 through the busbar 40, so that the wiring harness group 501 can be directly connected to the busbar 40 after being led out from the opening 604, which can reduce the layout path of the busbar 40. In addition, it can also make the area of ​​the wiring harness group 501 located outside the protective member 60 smaller, thereby allowing the wiring harness group 501 to receive better protection performance.

[0148] In some embodiments, the melting point of the protective member 60 is greater than or equal to 600° C. With this configuration, the protective member 60 can have better high temperature resistance, and when shielding high temperature exhaust discharged through the pressure relief mechanism 204 , the protective member 60 is not easily damaged when the exhaust contacts the protective member 60 .

[0149] In some embodiments, the protective member 60 is an insulating material. This setting can reduce the risk of short circuit in the battery device 100. In some specific application scenarios, the surface of the battery cell 20 in the battery device 100 does not have an isolation film, and the protective member 60 may contact the battery cell 20. At this time, the protective member 60 may be electrically connected to the battery cell 20, thereby causing the risk of short circuit. In other specific application scenarios, the surface of the battery cell 20 in the battery device 100 has an isolation film, and the protective member 60 may contact the battery cell 20. During the assembly process of the battery device 100 or during use, the isolation film on the surface of the battery cell 20 is prone to wear, thereby causing the protective member 60 to be electrically connected to the battery cell 20, thereby causing the risk of short circuit. In this embodiment, by setting the protective member 60 as an insulating material, the occurrence of the above situation can be effectively reduced.

[0150] In some embodiments, the protective member 60 is a ceramic composite sheet or a mica sheet. This configuration can, on the one hand, make the protective member 60 have good insulation, which can reduce the short circuit in the battery device 100; on the other hand, it can make the protective member 60 have good high temperature resistance, so as to reduce the influence of the exhaust discharged by the pressure relief mechanism 204 on the wiring harness group 501, thereby improving the reliability of the battery device 100.

[0151] In some embodiments, still refer to Figure 5 and Fig.10 In the projection plane perpendicular to the second direction Y, the orthographic projection of the wiring harness group 501 does not overlap with the orthographic projection of the pressure relief mechanism 204 .

[0152] When the battery cell 20 is depressurized, the emissions discharged through the pressure relief mechanism 204 are more concentrated and have a higher temperature in the time just after being discharged, and the harm caused is also greater. In the above embodiment, the orthographic projection of the wiring harness group 501 in the projection plane perpendicular to the second direction Y does not overlap with the orthographic projection of the pressure relief mechanism 204, which can make the wiring harness group 501 and the pressure relief mechanism 204 form an avoidance. When the battery cell 20 is depressurized, the emissions discharged through the pressure relief mechanism 204 can reduce the direct impact on the wiring harness group 501, thereby reducing the impact of the battery cell 20 on the wiring harness group 501 when the pressure is released, thereby improving the reliability of the battery device 100.

[0153] In some embodiments, see Fig.11 and Fig.12 , Fig.11 A schematic diagram of the structure of a battery device 100 provided in some embodiments of the present application (protective member 60 is hidden); Fig.12 for Fig.11 A partial enlarged view at B. The acquisition component 50 includes a temperature detection member 70, the wiring harness group 501 includes a plurality of wiring harnesses, the plurality of wiring harnesses include a first wiring harness 5011, and the first wiring harness 5011 is electrically connected to the temperature detection member 70; the first wiring harness 5011 includes a first extension section 50111 and a first bending section 50112, the first extension section 50111 extends along a first direction X, the temperature detection member 70 is located on one side of the first extension section 50111 along a third direction Z, the first bending section 50112 connects the first extension section 50111 and the temperature detection member 70, and the first direction X, the second direction Y and the third direction Z are perpendicular to each other.

[0154] When measuring the temperature of the battery cell 20, the temperature detection member 70 needs to be close to the battery cell 20 to make the measured data more accurate. When the battery cell assembly 30 includes multiple battery cells 20, the temperature detection member 70 needs to contact some of the battery cells 20, so that the temperature detection member 70 is located on one side of the first extension section 50111 along the third direction Z. At this time, when the wire harness group 501 is connected to the temperature detection member 70, the connection area at the tail of the wire harness group 501 needs to be bent to facilitate the connection between the wire harness group 501 and the battery cell 20. The bent connection area at the tail of the wire harness group 501 can be called a bending section.

[0155] The first extension section 50111 and the first bending section 50112 are respectively parts of the first wire harness 5011, and the two are connected to each other. Compared with the first extension section 50111, the extension direction of the first bending section 50112 is changed so that the first wire harness 5011 can be smoothly connected to the temperature detection member 70. The extension direction of the first bending section 50112 can be perpendicular to the first direction X, and can also have an angle greater than 0° and less than 90° with the first direction X.

[0156] In the above embodiment, by disposing the first bending section 50112 , the first extending section 50111 can be smoothly electrically connected to the temperature detecting member 70 .

[0157] In some embodiments, the first bending section 50112 includes a first connecting portion 501121 and a second connecting portion 501122, the first connecting portion 501121 connects the first extension section 50111 and the second connecting portion 501122, the second connecting portion 501122 connects the temperature detection component 70, and the second connecting portion 501122 is arranged opposite to the first extension section 50111 along the third direction Z.

[0158] The first connection portion 501121 and the second connection portion 501122 are respectively partial areas of the first bending section 50112. The second connection portion 501122 and the first extension section 50111 are arranged relative to each other along the third direction Z. The first connection portion 501121 is used to connect the first extension section 50111 and the second connection portion 501122. At this time, the first connection portion 501121 and the second connection portion 501122 have different extension directions.

[0159] In the above embodiment, the first connection portion 501121 and the second connection portion 501122 have different extension directions respectively, so that the first wiring harness 5011 can at least have good tensile strength, thereby reducing the possibility of connection breakage between the wiring harness group 501 and the temperature detection component 70 caused by vibration of the battery device 100, thereby improving the reliability of the battery device 100.

[0160] In some embodiments, still refer to Fig.11 and Fig.12 The first bending section 50112 also includes a third connecting portion 501123 , which extends along the third direction Z. The second connecting portion 501122 is connected to the temperature detecting component 70 through the third connecting portion 501123 .

[0161] In the application scenario where the wiring harness group 501 includes multiple first wiring harnesses 5011, it can be set that multiple wiring harness groups 501 are arranged along the third direction Z. At this time, the allowable sizes of the outlet paths of the multiple first wiring harnesses 5011 along the third direction Z (i.e., the area between the first extension section 50111 and the temperature detection element 70) are different. When the allowable size of the outlet path of one of the first wiring harnesses 5011 in the third direction Z is shorter, the first bending section 50112 can only include the first connecting portion 501121 and the second connecting portion 501122, and the second connecting portion 501122 extends along the first direction X and is electrically connected to the temperature detection element to reduce the space occupied in the third direction Z. When the allowable size of the outlet path of one of the first wiring harnesses 5011 in the third direction Z is longer, the third connecting portion 501123 can be set to directly extend along the third direction Z and be connected to the temperature detection element to reduce the layout size of the first wiring harness 5011.

[0162] In the above embodiment, by setting the third connecting portion 501123, the arrangement of the first wiring harness 5011 can be facilitated, and the first wiring harness 5011 can also have good tensile strength, thereby reducing the possibility of connection breakage between the wiring harness group 501 and the temperature detection component 70 caused by vibration of the battery device 100, thereby improving the reliability of the battery device 100.

[0163] In some embodiments, see Fig.11 , and see further Fig.13 , Fig.13 for Fig.11 A partial enlarged view at C. The battery device 100 further includes a busbar 40, the busbar 40 electrically connects at least two battery cells 20, the wiring harness group 501 includes a plurality of wiring harnesses, the plurality of wiring harnesses include a second wiring harness 5012, the second wiring harness 5012 is electrically connected to the busbar 40; the second wiring harness 5012 includes a second extension section 50121 and a second bending section 50122, the second extension section 50121 extends along the first direction X, the busbar 40 is located on one side of the second extension section 50121 along the third direction Z, and the second bending section 50122 connects the second extension section 50121 and the busbar 40.

[0164] The second extension section 50121 and the second bending section 50122 are respectively parts of the second wire harness 5012, and the two are connected to each other. Compared with the second extension section 50121, the extension direction of the second bending section 50122 is changed so that the second wire harness 5012 can be smoothly connected to the busbar 40. The extension direction of the second bending section 50122 can be perpendicular to the second direction Y, and can also have an angle with the second direction Y that is greater than 0° and less than 90°.

[0165] In the above embodiment, by disposing the second bending section 50122 , the second extending section 50121 can be smoothly electrically connected to the busbar 40 .

[0166] In some embodiments, the second bending section 50122 includes a fourth connecting portion 501221 and a fifth connecting portion 501222, the fourth connecting portion 501221 connects the second extension section 50121 and the fifth connecting portion 501222, the fifth connecting portion 501222 connects the busbar 40, the fifth connecting portion 501222 is arranged opposite to the second extension section 50121 along the third direction Z, and the first direction X, the second direction Y and the third direction Z are perpendicular to each other.

[0167] The fourth connection portion 501221 and the fifth connection portion 501222 are respectively partial areas of the second bending section 50122. The fifth connection portion 501222 and the second extension section 50121 are arranged relative to each other along the third direction Z. The fourth connection portion 501221 is used to connect the second extension section 50121 and the fifth connection portion 501222. At this time, the fourth connection portion 501221 and the fifth connection portion 501222 have different extension directions.

[0168] In the above embodiment, the fourth connection portion 501221 and the fifth connection portion 501222 have different extension directions, respectively, which can enable the second wiring harness 5012 to have good tensile strength, thereby reducing the connection break between the second wiring harness 5012 and the busbar 40 caused by the vibration of the battery device 100, thereby improving the reliability of the battery device 100.

[0169] In some embodiments, still refer to Fig.11 and Fig.13 The second bending section 50122 also includes a sixth connecting portion 501223 , which extends along the third direction Z. The fifth connecting portion 501222 is connected to the busbar 40 through the sixth connecting portion 501223 .

[0170] In the scenario where the harness group 501 includes a plurality of second harnesses 5012, and the plurality of second harnesses 5012 are arranged along the third direction Z, the allowable sizes of the outlet paths of the plurality of second harnesses 5012 along the third direction Z (i.e., the area between the second extension area and the connection area of ​​the busbar 40) are different. When the allowable size of the outlet path of one of the second harnesses 5012 in the third direction Z is shorter, the second bending section 50122 may only include a fourth connection portion 501221 and a fifth connection portion 501222, and the fifth connection portion 501222 extends along the first direction X and is electrically connected to the busbar 40, so as to reduce the space occupied in the third direction Z. When the allowable size of the outlet path of one of the second harnesses 5012 in the third direction Z is longer, the sixth connection portion 501223 may be arranged to extend along the third direction Z and be connected to the busbar 40, so as to reduce the size arrangement of the second harness 5012.

[0171] In the above embodiment, by setting the sixth connecting portion 501223, the arrangement of the second wiring harness 5012 can be facilitated, and the second wiring harness 5012 can also have good tensile strength, thereby reducing the possibility of connection breakage between the wiring harness group 501 and the busbar 40 caused by vibration of the battery device 100, thereby improving the reliability of the battery device 100.

[0172] In some embodiments, the battery cell 20 includes a first electrode terminal and a second electrode terminal with opposite polarities, and the first electrode terminal and the second electrode terminal are arranged on the first wall 205. There are two wiring harness groups 501, and the second wiring harness 5012 of one wiring harness group 501 is electrically connected to the first electrode terminal through a bus 40, and the second wiring harness 5012 of the other wiring harness group 501 is electrically connected to the second electrode terminal through another bus 40.

[0173] The number of second wire harnesses 5012 in the two wire harness groups 501 can be the same, and the two wire harness groups 501 can be separately arranged or connected together, such as by bonding to form a whole. In some specific application scenarios, when the first wall 205 has a pressure relief mechanism 204, at least part of the two wire harness groups 501 can be respectively arranged on opposite sides of the pressure relief mechanism 204.

[0174] In the above embodiment, the two wiring harness groups 501 are connected to the first electrode terminal and the second electrode terminal of the battery cell 20 with opposite polarities through two busbars 40 respectively, which can facilitate the collection component 50 to form a loop with the battery cell 20 to facilitate the collection component 50 to collect partial information of the battery cell 20.

[0175] In another embodiment, the first electrode terminal and the second electrode terminal may also be located at different walls of the housing 202 of the same battery cell 20 . In this case, there are two wiring harness groups 501 , and the second wiring harnesses 5012 of the two wiring harness groups 501 are connected to the two electrode terminals 201 , respectively.

[0176] In some embodiments, still refer to Fig.11 The collection component 50 also includes a connector 502 , and the two harness groups 501 have a collection area, which is connected to the connector 502 .

[0177] One or more connectors 502 may be provided. In some examples, the number of connectors 502 may be selectively set according to the amount of information of the battery cells 20 that needs to be measured. For example, the more information of the battery cells 20 that needs to be measured, the more connectors 502 may be provided.

[0178] The gathering area is an area where two wire harness groups 501 are connected to each other. The two wire harness groups 501 may be connected together as a whole or may be partially separated.

[0179] In the above embodiment, a gathering area is provided for the two wiring harness groups 501 to facilitate the arrangement of the outgoing wires of the two wiring harness groups 501 , thereby making the connection with the connector 502 more convenient.

[0180] In some embodiments, still refer to Figure 11-13 The battery device 100 also includes a busbar 40 and a temperature detection component 70. The busbar 40 electrically connects at least two battery cells 20. The busbar 40 is located on the side of the first wall 205 away from the second wall 206. The temperature detection component 70 is electrically connected to the wiring harness group 501. The temperature detection component 70 is used to detect the temperature of the busbar 40.

[0181] In the above embodiment, the busbar 40 electrically connects at least two battery cells 20, and the battery cell 20 and the busbar 40 have a solid connection, and the two have a high efficiency of heat transfer. When the temperature detection element 70 detects the temperature of the battery cell 20, in order to facilitate the arrangement in the battery device 100, the temperature of the battery cell 20 can be collected by detecting the temperature of the busbar 40.

[0182] In some embodiments, see Fig.11 and Fig.14 , Fig.14 for Fig.11A partial enlarged view at D. The busbar 40 includes a buffer portion 401 and two busbars 402, the two busbars 402 are arranged along the first direction X and are respectively connected to two battery cells 20, the buffer portion 401 connects the two busbars 402, the buffer portion 401 protrudes from the surface of the busbar 402 away from the first wall 205 along the second direction Y, and in a projection plane perpendicular to the first direction X, at least part of the orthographic projection of the buffer portion 401 overlaps at least part of the orthographic projection of the temperature detection member 70.

[0183] The buffer portion 401 can be used to absorb the expansion force of the battery cell 20. The battery cell 20 will expand during use. The busbar 40 needs to connect at least two battery cells 20. When one of the battery cells 20 expands, it will give a tensile force to the busbar 40 connected to the battery cell 20, which may cause the busbar 40 and the battery cell 20 to fall off in the connection area. By setting a surface protruding from the busbar 402 and away from the first wall 205 along the second direction Y at the position of the buffer portion 401 to form a curved portion, when the battery cell 20 expands, the curved portion can be gradually stretched to absorb the tensile force given to the busbar 40 by the expansion of the battery cell 20, so as to reduce the risk of the busbar 40 and the battery cell 20 falling off in the connection area.

[0184] The busbar portion 402 and the buffer portion 401 are both partial regions of the busbar 40 . The two busbars 40 are arranged at intervals along the first direction X and are connected via the buffer portion 401 .

[0185] In the projection plane perpendicular to the first direction X, the orthographic projection of the buffer portion 401 may partially overlap with the orthographic projection of the temperature detection member 70, or may completely overlap. For example, part of the orthographic projection of the buffer portion 401 may overlap with part of the orthographic projection of the temperature detection member 70, or the entire orthographic projection of the buffer portion 401 may overlap with part of the orthographic projection of the temperature detection member 70, or part of the orthographic projection of the buffer portion 401 may overlap with the entire orthographic projection of the temperature detection member 70. When the buffer portion 401 has at least two protrusions, the temperature detection member 70 may be disposed between two adjacent protrusions, so that the buffer portion 401 can limit the temperature detection member 70 in at least one direction.

[0186] In the above embodiment, by providing the buffer portion 401 on the busbar 40, the expansion force of the battery cell 20 can be absorbed. On this basis, the orthographic projection of the temperature detection member 70 in the projection plane perpendicular to the first direction X is at least partially overlapped with the orthographic projection of the buffer portion 401, so that the space occupied in the second direction Y caused by the provision of the temperature detection member 70 can be reduced.

[0187] In some embodiments, still refer to Fig.11 and Fig.14The buffer portion 401 has a receiving groove (not shown in the figure), and the temperature detection member 70 is at least partially located in the receiving groove.

[0188] The buffer portion 401 may have a plurality of protrusions, and a receiving groove is formed between adjacent protrusions; or a corresponding groove may be provided on the buffer portion 401 to form the receiving groove.

[0189] In the above embodiment, a receiving groove is provided to place the temperature detecting member 70 , which can facilitate the fixation of the temperature detecting member 70 and reduce the influence caused by the relative movement of the temperature detecting member 70 .

[0190] In some embodiments, see Fig.15 , Fig.15 Schematic diagram of the exploded structure of the battery device 100 provided in some embodiments of the present application. The battery device 100 further includes a busbar 40 and an insulating member 80, the protective member 60 is fixedly connected to the wiring harness group 501, the busbar 40 is electrically connected to at least two battery cells 20, the insulating member 80 is located on the side of the first wall 205 away from the second wall 206, and the busbar 40 and the protective member 60 are connected to the surface of the insulating member 80 away from the first wall 205.

[0191] The protective member 60 is fixedly connected to the wiring harness group 501, which means that the relative positions of the protective member 60 and the wiring harness group 501 are fixed, and the protective member 60 and the wiring harness group 501 may be detachably connected or non-detachably connected. The two may be directly connected to achieve positioning and matching, or they may be indirectly connected through other components to achieve positioning and matching, for example, the wiring harness group 501 may be placed on the busbar 40.

[0192] The insulating member 80 may be connected to the first wall 205 or to the busbar 40. Since the busbar 40 is connected to the battery cell 20, the insulating member 80 can be fixed relative to the battery cell 20. Alternatively, the insulating member 80 may be connected to both the first wall 205 and the busbar 40.

[0193] In the above embodiment, the reliability of the battery device 100 is also improved by providing the protective member 60, and the positioning and matching of the protective member 60 with the wiring harness group 501 can facilitate the arrangement of the wiring harness group 501 and reduce the relative displacement of the wiring harness group 501 and the components connected thereto, thereby improving the connection reliability of the wiring harness group 501.

[0194] In some embodiments of the present application, a battery device 100 is provided, including a battery cell assembly 30, a collection assembly 50, a protective member 60 and a current collector 40. The battery cell assembly 30 includes a plurality of battery cells 20 arranged along a first direction X. The battery cells 20 include a housing 202 and a pressure relief mechanism 204. The housing 202 includes a first wall 205 and a second wall 206 arranged opposite to each other along a second direction Y. The pressure relief mechanism 204 is arranged on the first wall 205. The collection assembly 50 includes a temperature detection member 70 and two wire harness groups 501. The wire harness group 501 is located between the pressure relief mechanism 204 and the current collector 40 along a third direction Z. In a projection plane perpendicular to the second direction Y, the orthographic projection of the wire harness group 501 does not overlap with the orthographic projection of the pressure relief mechanism 204. The wire harness group 501 includes a first wire harness 5011 and a second wire harness 5012. At least a portion of the wire harness group 501 is arranged on a side of the first wall 205 away from the second wall 206. The protective member 60 includes a first protective portion 601, a second protective portion 602 and a third protective portion 603, the first protective portion 601 and the third protective portion 603 are located on opposite sides of the wiring harness group 501 along the second direction Y, the second protective portion 602 connects the first protective portion 601 and the third protective portion 603, the second protective portion 602 is located between the pressure relief mechanism 204 and the wiring harness group 501, and the protective member 60 is provided with an opening 604 on the side facing the busbar 40, and the first wiring harness 5011 and the second wiring harness 5012 extend to the outside of the protective member 60 through the opening 604. The first wiring harness 5011 is connected to the temperature detection member 70, and the second wiring harness 5012 is connected to the battery cell 20. The protective member 60 is a ceramic composite sheet or a mica sheet. The first direction X, the second direction Y and the third direction Z are perpendicular to each other. The acquisition component 50 also includes a connector 502, and the two wiring harness groups 501 have a collection area, and the collection area is connected to the connector 502.

[0195] The first wiring harness 5011 includes a first extension section 50111, a first connection portion 501121, a second connection portion 501122, and a third connection portion 501123 connected in sequence, the third connection portion 501123 is connected to the temperature detection member 70, and the first extension section 50111 and the second connection portion 501122 are arranged opposite to each other along the third direction Z. The second wiring harness 5012 includes a second extension section 50121, a fourth connection portion 501221, a fifth connection portion 501222, and a sixth connection portion 501223 connected in sequence, the sixth connection portion 501223 is connected to the busbar 40, and the second extension section 50121 and the fifth connection portion 501222 are arranged opposite to each other along the third direction Z.

[0196] The busbar 40 includes a buffer portion 401 and two busbars 402. The two busbars 402 are arranged along the first direction X and are respectively connected to two battery cells 20. The buffer portion 401 connects the two busbars 402. The buffer portion 401 protrudes from the surface of the busbar 402 away from the first wall 205 along the second direction Y and forms a receiving groove. The temperature detection component 70 is located in the receiving groove.

[0197] The battery device 100 also includes a bus 40 and an insulating member 80. The protective member 60 is positioned and matched with the wiring harness group 501. The bus 40 electrically connects at least two battery cells 20. The insulating member 80 is located on the side of the first wall 205 away from the second wall 206. The bus 40 and the protective member 60 are connected to the surface of the insulating member 80 away from the first wall 205.

[0198] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application may be combined with each other.

[0199] The above embodiments are only used to illustrate the technical solution of the present application and are not used to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A battery device, characterized in that: include: A battery cell assembly, comprising a plurality of battery cells arranged along a first direction, the battery cells comprising a housing and a pressure relief mechanism, the housing comprising a first wall and a second wall arranged opposite to each other along a second direction, the pressure relief mechanism being arranged on the first wall, the first direction being perpendicular to the second direction; A collection component is configured to collect information of the battery cell, the collection component includes at least one wiring harness group, at least part of which is arranged on a side of the first wall away from the second wall; The protective element is configured to protect the wiring harness group. Along the second direction, the protective element is at least partially located on a side of the wiring harness group that is away from the first wall.

2. The battery device according to claim 1, characterized in that: The protective member includes a first protective portion and a second protective portion connected to each other, the first protective portion is located on the side of the wiring harness group away from the first wall, the second protective portion is arranged opposite to the wiring harness group along a third direction, and the first direction, the second direction and the third direction are perpendicular to each other.

3. The battery device according to claim 2, characterized in that: In a projection plane perpendicular to the second direction, an orthographic projection of the second protecting portion is located between an orthographic projection of the pressure relief mechanism and an orthographic projection of the wiring harness group along the third direction.

4. The battery device according to claim 2, characterized in that: The protective member further includes a third protecting portion, which is connected to the second protecting portion and arranged opposite to the first protecting portion along the second direction. The third protecting portion is located on a side of the wiring harness group facing the first wall.

5. The battery device according to claim 4, characterized in that: Along the third direction, the protective member has an opening on a side opposite to the second protective portion; The wire harness group includes a plurality of wire harnesses, and a portion of at least one of the wire harnesses extends outside the protective member through the opening.

6. The battery device according to claim 5, characterized in that: The acquisition component includes a temperature detection component, and the plurality of wiring harnesses include a first wiring harness, a portion of which extends through the opening to the outside of the protective component and is electrically connected to the temperature detection component.

7. The battery device according to claim 5, characterized in that: The plurality of wire harnesses include a second wire harness, a portion of which extends through the opening to the outside of the protection member and is electrically connected to the battery cell.

8. The battery device according to claim 7, characterized in that: The battery device also includes a busbar, which electrically connects at least two of the battery cells. The busbar is located on a side of the first wall that faces away from the second wall. In a projection plane perpendicular to the second direction, the orthographic projection of the protective member is located along the third direction between the orthographic projection of the pressure relief mechanism and the orthographic projection of the busbar. The opening is arranged toward the busbar, and the second wiring harness is electrically connected to the battery cells through the busbar.

9. The battery device according to any one of claims 1 to 8, characterized in that: The melting point of the protective element is greater than or equal to 600°C.

10. The battery device according to any one of claims 1 to 8, characterized in that: The protective member is made of insulating material.

11. The battery device according to any one of claims 1 to 8, characterized in that: The protective element is a ceramic composite sheet or a mica sheet.

12. The battery device according to any one of claims 1 to 8, characterized in that: In a projection plane perpendicular to the second direction, an orthographic projection of the wiring harness group does not overlap with an orthographic projection of the pressure relief mechanism.

13. The battery device according to any one of claims 1 to 8, characterized in that: The acquisition component includes a temperature detection component, the wiring harness group includes a plurality of wiring harnesses, the plurality of wiring harnesses include a first wiring harness, and the first wiring harness is electrically connected to the temperature detection component; The first wiring harness includes a first extension section and a first bending section, the first extension section extends along the first direction, the temperature detection component is located on one side of the first extension section along the third direction, the first bending section connects the first extension section and the temperature detection component, and the first direction, the second direction and the third direction are perpendicular to each other.

14. The battery device according to claim 13, characterized in that: The first bending section includes a first connecting portion and a second connecting portion, the first connecting portion connects the first extending section and the second connecting portion, the second connecting portion connects the temperature detecting member, and the second connecting portion and the first extending section are arranged opposite to each other along the third direction.

15. The battery device according to claim 14, characterized in that: The first bending section further includes a third connecting portion, the third connecting portion extends along the third direction, and the second connecting portion is connected to the temperature detecting component through the third connecting portion.

16. The battery device according to any one of claims 1 to 8, characterized in that: The battery device further includes a busbar, the busbar electrically connecting at least two of the battery cells, the wiring harness group includes a plurality of wiring harnesses, the plurality of wiring harnesses include a second wiring harness, and the second wiring harness is electrically connected to the busbar; The second wiring harness includes a second extending section and a second bending section, the second extending section extends along the first direction, the busbar is located at one side of the second extending section along the third direction, and the second bending section connects the second extending section and the busbar.

17. The battery device according to claim 16, characterized in that: The second bending section includes a fourth connecting portion and a fifth connecting portion, the fourth connecting portion connects the second extension section and the fifth connecting portion, the fifth connecting portion connects the bus bar, the fifth connecting portion and the second extension section are arranged relative to each other along a third direction, and the first direction, the second direction and the third direction are perpendicular to each other.

18. The battery device according to claim 17, characterized in that: The second bending section further includes a sixth connecting portion, the sixth connecting portion extends along the third direction, and the fifth connecting portion is connected to the busbar through the sixth connecting portion.

19. The battery device according to claim 16, characterized in that: The battery cell includes a first electrode terminal and a second electrode terminal with opposite polarities, the first electrode terminal and the second electrode terminal are arranged on the first wall, there are two wiring harness groups, the second wiring harness of one wiring harness group is electrically connected to the first electrode terminal through a bus, and the second wiring harness of the other wiring harness group is electrically connected to the second electrode terminal through another bus.

20. The battery device according to claim 19, characterized in that The acquisition component further comprises a connector, and the two wiring harness groups have a collection area, and the collection area is connected to the connector.

21. The battery device according to any one of claims 1 to 8, characterized in that: The battery device also includes a busbar and a temperature detector. The busbar electrically connects at least two of the battery cells and is located on a side of the first wall away from the second wall. The temperature detector is electrically connected to the wiring harness assembly and is used to detect the temperature of the busbar.

22. The battery device according to claim 21, characterized in that The busbar includes a buffer portion and two busbars, the two busbars are arranged along the first direction and are respectively connected to two battery cells, the buffer portion connects the two busbars, the buffer portion protrudes from the surface of the busbar away from the first wall along the second direction, and in a projection plane perpendicular to the first direction, at least part of the orthographic projection of the buffer portion at least partially overlaps with the orthographic projection of the temperature detection member.

23. The battery device according to claim 22, characterized in that The buffer portion has a receiving groove, and the temperature detecting element is at least partially located in the receiving groove.

24. The battery device according to any one of claims 1 to 8, characterized in that: The battery device also includes a bus and an insulating member. The protective member is fixedly connected to the wiring harness group. The bus electrically connects at least two of the battery cells. The insulating member is located on a side of the first wall facing away from the second wall. The bus and the protective member are connected to a surface of the insulating member facing away from the first wall.

25. An electrical device, characterized in that: A battery device comprising any one of claims 1-24.

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