Battery device, energy storage device, energy storage system, and charging network

Abstract

The application discloses a battery device, an energy storage device, an energy storage system and a charging network. The battery device comprises a battery monomer assembly, a sampling wire harness, and a fixing member. The fixing member is in an integrated structure and extends along a first direction. The fixing member is located on one side of the battery monomer assembly along a second direction. The fixing member comprises a body part, a first side wall, a second side wall and a shielding part. The first side wall and the second side wall are oppositely arranged along a third direction and protrude from the body part in a direction away from the battery monomer assembly. The shielding part is connected with the first side wall and is bent relative to the first side wall and extends to the second side wall. A gap is formed between the shielding part and the second side wall. The body part, the first side wall, the second side wall and the shielding part jointly form a wire harness containing space. The sampling wire harness is used to enter the wire harness containing space from the gap. The battery device, the energy storage device, the energy storage system and the charging network can improve the reliability of the battery device.

Description

Technical Field

[0001] This application relates to the field of batteries, and more specifically, to a battery device, an energy storage device, an energy storage system, and a charging network. Background Technology

[0002] With the rapid development of new energy and energy storage technologies, the capacity and size of battery modules are constantly increasing. Battery devices typically consist of multiple arranged battery cells and sampling harnesses for collecting status information. To support and isolate the sampling harnesses, a harness isolation plate is usually placed above the battery cells.

[0003] However, the structure of wire harness separators is often quite complex, and the wire harness assembly process is cumbersome, which is not conducive to improving assembly efficiency and controlling manufacturing costs. Therefore, how to provide a battery device with a reasonable structure, easy molding, and good protective performance is a technical problem that urgently needs to be solved by those skilled in the art. Utility Model Content

[0004] This application provides a battery device, an energy storage device, an energy storage system, and a charging network, which can improve the reliability of the battery device.

[0005] In a first aspect, a battery device is provided, comprising: a battery cell assembly including a plurality of battery cells arranged along a first direction; a sampling harness for collecting state information of at least one of the battery cells; a fixing member having an integrally formed structure and extending along the first direction, the fixing member being located on one side of the battery cell assembly along a second direction; the fixing member including a body portion, a first sidewall, a second sidewall, and a shielding portion; the first sidewall and the second sidewall being disposed opposite each other along a third direction and protruding from the body portion in a direction away from the battery cell, the first direction, the second direction, and the third direction being perpendicular to each other; the shielding portion being connected to the first sidewall and bending relative to the first sidewall and extending towards the second sidewall, the shielding portion having a gap with the second sidewall; the body portion, the first sidewall, the second sidewall, and the shielding portion together forming a harness receiving space, the sampling harness being used to enter the harness receiving space through the gap.

[0006] Therefore, in the battery device of this application embodiment, the fixing member, consisting of the main body, the first sidewall, the second sidewall, and the bent shielding part, forms a wire harness accommodating space, providing a relatively enclosed physical protective barrier for the sampling wire harness. Under extreme conditions such as thermal runaway of a single battery cell, this barrier can prevent the high-temperature emissions emitted by the battery cell from directly contacting and corroding the sampling wire harness, reducing the risk of short circuits caused by melting of the wire harness skin and improving the overall reliability of the battery device. At the same time, the gap reserved between the shielding part and the second sidewall constitutes an opening for the sampling wire harness to enter the wire harness accommodating space, allowing the sampling wire harness to directly enter the wire harness accommodating space from the gap. This saves time-consuming manual wire arrangement and cumbersome processes such as cable ties, effectively improving the assembly efficiency of the battery device while reducing material and labor costs. Furthermore, the sampling wire harness bound with cable ties is usually cylindrical, which occupies a large space in the second direction, while the sampling wire harness without cable ties is more flexible in shape and can accommodate more in a limited wire harness accommodating space. In addition, the fastener is set as an integrally molded structure extending along the first direction. This continuous structure itself has good overall rigidity, which reduces the possibility of bending and breaking of long strip parts during assembly, and can reduce mold development and manufacturing costs.

[0007] In some embodiments, the fastener includes an elastic connection portion connected to the shielding portion and the first sidewall. This elastic connection portion allows the shielding portion to elastically swing relative to the first sidewall, increasing the gap to allow the sampling harness to enter the harness receiving space, or decreasing the gap to prevent the sampling harness from exiting the harness receiving space. During the assembly of the sampling harness, the elastic connection portion allows the shielding portion to elastically swing, increasing the gap and facilitating the smooth insertion of the sampling harness into the harness receiving space. After insertion, the elastic connection portion allows the shielding portion to elastically rebound, decreasing the gap and creating a limiting constraint on the sampling harness within the harness receiving space. This reduces the possibility of the sampling harness exiting the harness receiving space due to vibration or other factors, improving the stability of the wiring.

[0008] In some embodiments, the thickness of the elastic connection is less than the thickness of the first sidewall and less than the thickness of the shielding portion. This localized thinning design makes the elastic connection more susceptible to deformation under stress, reducing the force required to open the gap and facilitating the elastic swinging of the shielding portion. Simultaneously, maintaining a relatively thick first sidewall and shielding portion still ensures good structural rigidity, balancing the flexible assembly requirements of the fasteners with the overall structural strength.

[0009] In some embodiments, the ratio of the thickness of the elastic connection portion to the thickness of the first sidewall is greater than or equal to 0.25 and less than or equal to 0.75; and / or, the ratio of the thickness of the elastic connection portion to the thickness of the shielding portion is greater than or equal to 0.25 and less than or equal to 0.75. By setting the ratio of the thickness of the elastic connection portion to the thickness of the first sidewall to be greater than or equal to 0.25, and / or the ratio of the thickness of the elastic connection portion to the thickness of the shielding portion to be greater than or equal to 0.25, the risk of fatigue fracture of the elastic connection portion under repeated bending can be reduced, thereby improving structural stability. Simultaneously, by setting the ratio of the thickness of the elastic connection portion to the thickness of the first sidewall to be less than or equal to 0.75, and / or the ratio of the thickness of the elastic connection portion to the thickness of the shielding portion to be less than or equal to 0.75, the bending resistance can be limited to prevent excessive bending, thus facilitating the elastic swing of the shielding portion. This ratio range allows the elastic connection portion to possess sufficient bending toughness while maintaining a long fatigue life, improving the service life and reliability of the fastener.

[0010] In some embodiments, a first structure is connected to the end of the shielding portion near the second sidewall, the first structure being bent away from the second sidewall relative to the shielding portion; and / or, a second structure is connected to the end of the shielding portion near the second sidewall, the second structure being bent away from the second sidewall relative to the shielding portion to shield at least a portion of the gap. The first structure, bent outward relative to the shielding portion, facilitates the application of external force to the shielding portion. For example, when inserting the sampling harness, the shielding portion can be raised by pulling or squeezing the first structure outward to increase the size of the gap, facilitating the entry of the sampling harness into the harness receiving space. The second structure, bent inward relative to the shielding portion, covers at least a portion of the gap. After the sampling harness enters the harness receiving space, the second structure limits the risk of the sampling harness detaching through the gap, improving the stability of the sampling harness.

[0011] In some embodiments, the battery cell includes a first wall facing the fixing member, the first wall being provided with a pressure relief mechanism, and a pressure relief area is provided in the region of the body portion located outside the wiring harness housing space. This pressure relief area is used to discharge emissions from the battery cell when the pressure relief mechanism is actuated. On the one hand, the pressure relief area does not obstruct the discharge of emissions, thus improving the reliability of the battery cell; on the other hand, since the pressure relief area is located outside the wiring harness housing space, this spatial isolation design reduces direct contact between high-temperature emissions and the sampling wiring harness, lowering the risk of electrical short circuits caused by outer sheath melting.

[0012] In some embodiments, the fastener includes two harness receiving spaces arranged along the third direction; along the third direction, the pressure relief area is located between the two harness receiving spaces to fully utilize the space on both sides of the pressure relief mechanism, facilitating the storage of more sampling harnesses and improving the integration of the components. Additionally, the harness receiving spaces on both sides can also restrict the emission path of emissions, guiding emissions to be discharged along a specific path, thus improving the reliability of exhaust.

[0013] In some embodiments, the body includes a plurality of pressure relief zones arranged at intervals along the first direction, and the plurality of pressure relief zones correspond one-to-one with the pressure relief mechanisms of a plurality of battery cells, so that any battery cell that experiences thermal runaway has a corresponding exhaust channel, reducing the retention of emissions between battery cells, improving exhaust efficiency, reducing the risk of thermal diffusion between adjacent battery cells, and improving the reliability of the battery device.

[0014] In some embodiments, the battery cell includes a first wall facing the fixing member, the first wall being provided with electrode terminals; the battery device further includes a busbar component electrically connected to the electrode terminals; a first fixing area is provided in the region of the body portion located outside the wire harness accommodating space, the first fixing area being fixedly connected to the busbar component to improve the structural stability of the fixing member and the busbar component.

[0015] In some embodiments, the fastener further includes a limiting portion connected to the first fixing region and disposed opposite to the first fixing region along the second direction; the busbar includes a second fixing region located between the first fixing region and the limiting portion. By clamping the second fixing region of the busbar between the first fixing region and the limiting portion, the movement of the busbar in the second direction can be restricted, and compared with fixing the busbar through a single-layer structure, a higher connection strength can be achieved, improving the tightness of the busbar assembly on the fastener.

[0016] In some embodiments, the limiting portion is connected to the end of the second sidewall away from the main body and is bent relative to the second sidewall in a direction away from the blocking portion. This structure reuses the second sidewall, which forms the wire harness receiving space, as a component for the interconnection between the limiting portion and the main body, making the overall structure of the fastener more compact, reducing the material and third-dimensional space required for additional components for the interconnection between the limiting portion and the main body, and improving space utilization.

[0017] In some embodiments, the busbar includes two connecting portions and a transition portion; along the first direction, the transition portion connects to the two connecting portions and is located between the two connecting portions; the transition portion protrudes relative to the connecting portions in a direction away from the battery cell; the connecting portion includes a connecting area and a second fixing area arranged along the third direction, the connecting area being used for electrical connection with the electrode terminal. The protruding transition portion can form at least one elastic, arch-like buffer structure. When the multiple battery cells electrically connected to the busbar undergo thermal expansion and contraction or slight deflection, the transition portion can absorb and release the corresponding stress through its own elastic deformation, reducing the direct transmission of tensile force to the connecting area and lowering the risk of electrical connection failure between the busbar and the electrode terminal. Furthermore, the second fixing area and the connecting area included in the connecting portion are arranged along the third direction, so that even when the second fixing area is relatively fixed to the fixing member, the relative stability between the fixing member, the busbar, and the electrode terminal can be improved.

[0018] In some embodiments, along the first direction, the transition portion is connected to the connection area of ​​the two connection portions and is located between the connection areas of the two connection portions; along the third direction, the second fixing area protrudes from the transition portion relative to the connection area, so that when the second fixing area is clamped between the limiting portion and the first fixing area, the transition portion is located outside the limiting portion and the first fixing area, the limiting portion has little impact on the transition portion, and it is convenient for the installation of the busbar component.

[0019] In some embodiments, the fastener includes a plurality of limiting portions spaced apart along the first direction, and a portion of the transition portion is accommodated within the gap between two adjacent limiting portions along the first direction. When the second fixing region is clamped between the limiting portions and the first fixing region, the transition portion can be located within the gap between two adjacent limiting portions, which provides clearance for the transition portion; furthermore, the two limiting portions can also form a barrier against the transition portion along the first direction, further restricting the movement of the merging component and improving the fixing effect.

[0020] In some embodiments, the limiting portion is provided with a protruding structure protruding toward the second fixing area, and the second fixing area is provided with a recessed groove structure or a through hole in the direction away from the limiting portion. At least part of the protruding structure is accommodated in the groove structure or the through hole, so as to achieve relative fixation between the second fixing area and the limiting portion, thereby achieving relative fixation between the busbar component and the fixing member, which can improve the stability of the structure.

[0021] In some embodiments, the limiting part, the second fixing area, and the first fixing area are fixedly connected by a connector, which passes through the limiting part, the second fixing area, and the first fixing area along the second direction to achieve relative fixation between the second fixing area and the limiting part, thereby achieving relative fixation between the busbar component and the fixing component, which can improve the stability of the structure.

[0022] In some embodiments, the first wall has two electrode terminals arranged along the third direction; along the second direction, the retainer is located between the two electrode terminals to make full use of the area between the two electrode terminals, reducing the additional stacking of components in the second direction, further reducing the size of the battery device in the second direction, and increasing the energy density of the battery device.

[0023] In some embodiments, the fastener is made of polyoxymethylene, polypropylene, polycarbonate, polyolefin, or glass fiber. These materials possess good insulation, ductility, and structural strength. Fasteners made using these materials are not easily bent or broken even when the overall length is long, and can maintain morphological stability under conditions such as battery cell heating and vibration, thus improving the reliability of the fastener.

[0024] In a second aspect, an energy storage device is provided, comprising: a plurality of battery devices according to the first aspect or any one of the first aspects, the battery devices being used to store or provide electrical energy.

[0025] Thirdly, an energy storage system is provided, comprising: a power conversion device; and an energy storage device of the second aspect, the power conversion device being used to electrically connect a power generation device and an energy storage device.

[0026] Fourthly, a charging network is provided, comprising: a charging pile; an energy storage device of the second aspect or an energy storage system of the third aspect, the energy storage device being used to provide electrical energy to the charging pile. Attached Figure Description

[0027] Figure 1 This is a partial structural schematic diagram of a battery device according to an embodiment of this application; Figure 2 This is a partial structural diagram of a battery device according to an embodiment of this application; Figure 3 This is another partial structural schematic diagram of a battery device according to an embodiment of this application; Figure 4 This is an exploded view of a partial structure of a battery device according to an embodiment of this application; Figure 5 This is a cross-sectional schematic diagram of a partial structure of a fastener according to an embodiment of this application; Figure 6 This is a schematic diagram of the structure of a battery cell according to an embodiment of this application; Figure 7 This is a schematic diagram of the structure of a busbar component according to an embodiment of this application; Figure 8 This is a partial structural diagram of a battery device according to another embodiment of this application; Figure 9 This is a schematic diagram of the structure of a fastener according to another embodiment of this application; Figure 10 This is a schematic diagram of the structure of a busbar component according to another embodiment of this application; Figure 11 This is a cross-sectional schematic diagram of a partial structure of the fastener and the busbar component according to an embodiment of this application; Figure 12 This is a cross-sectional schematic diagram of a partial structure of the fastener and the busbar component according to another embodiment of this application; Figure 13 This is a structural block diagram of an energy storage system according to an embodiment of this application; Figure 14 This is a structural block diagram of a charging network according to an embodiment of this application.

[0028] The accompanying drawings are not drawn to scale.

[0029] Figure label: 1-Energy storage device; 2-Power conversion device; 3-Generation device; 4-Charging pile; 5-Connector; 10-Battery unit; 11-Casing; 111-First casing section; 112-Second casing section; 12-Battery cell assembly; 13-Sampling harness; 131-Sampling end; 20-Battery cell; 21-Outer shell; 211-First wall; 212-Pressure relief mechanism; 213-Electrode terminal; 14-Fixing component; 141-Main body; 1411-Pressure relief area; 412-First fixing area; 142-Shielding part; 1421-First structure; 1422-Second structure; 143-First sidewall; 144-Second sidewall; 145-Gap; 146-Wire harness accommodating space; 147-Elastic connection part; 148-Limiting part; 1481-Protruding structure; 15-Busting component; 151-Connecting part; 1511-Connecting area; 1512-Second fixing area; 1513-Through hole; 152-Transition part; 16-Connector. Detailed Implementation

[0030] The technical solutions in the embodiments of this application will now be described with reference to the accompanying drawings.

[0031] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0032] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used in this application specification is for the purpose of describing particular embodiments only and is not intended to limit this application; the terms "comprising" and "having," and any variations thereof, in the specification, claims, and foregoing drawings of this application are intended to cover non-exclusive inclusion. The terms "first," "second," etc., in the specification, claims, or foregoing drawings of this application are used to distinguish different objects, rather than to describe a specific order or hierarchy.

[0033] In this application, the reference to "embodiment" means that a specific feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a mutually exclusive, independent, or alternative embodiment. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described in this application can be combined with other embodiments.

[0034] In this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, in this application, the character " / " generally indicates that the preceding and following related objects have an "or" relationship.

[0035] In the embodiments of this application, the same reference numerals denote the same components, and for the sake of brevity, detailed descriptions of the same components are omitted in different embodiments. It should be understood that the thickness, length, width, and other dimensions of various components in the embodiments of this application shown in the accompanying drawings, as well as the overall thickness, length, width, and other dimensions of the integrated device, are merely illustrative and should not constitute any limitation on this application.

[0036] In this application, "multiple" refers to two or more (including two), similarly, "multiple sets" refers to two or more (including two sets), and "multiple pieces" refers to two or more (including two pieces).

[0037] In this embodiment of the application, the battery cell can be a secondary battery, which refers to a battery cell that can be recharged to activate the active materials and continue to be used after the battery cell has been discharged.

[0038] The battery cell can be a lithium-ion battery, sodium-ion battery, sodium-lithium-ion battery, lithium metal battery, sodium metal battery, lithium-sulfur battery, magnesium-ion battery, nickel-metal hydride battery, nickel-cadmium battery, lead-acid battery, etc., and the embodiments of this application are not limited to this.

[0039] With the rapid development of new energy and energy storage technologies, the capacity and size of battery modules are constantly increasing. Battery devices typically consist of multiple arranged battery cells and sampling harnesses for collecting status information. To support and isolate the sampling harnesses, fixing structures such as harness isolation plates are usually installed above the battery cells.

[0040] However, the structure of wire harness separators is often complex, and the wire harness assembly process is cumbersome, which is not conducive to improving assembly efficiency and controlling manufacturing costs. At the same time, as battery modules gradually become longer, wire harness separators struggle to balance space utilization, molding convenience, and effective protection of the wire harness, failing to adequately meet the increasing demands of battery devices for high energy density and high reliability. Therefore, how to provide a battery device with a reasonable structure, easy molding, and good protective performance is a technical problem that urgently needs to be solved by those skilled in the art.

[0041] Therefore, the battery device, energy storage device, energy storage system, and charging network of the present application embodiments can solve the above-mentioned problems. The battery device of the present application embodiments includes: a battery cell assembly, a sampling harness, and a fixing member. Specifically, the battery cell assembly includes a plurality of battery cells arranged along a first direction; the sampling harness is used to collect state information of at least one battery cell; the fixing member has an integrally formed structure and extends along the first direction, and the fixing member is located on one side of the battery cell assembly along a second direction; the fixing member includes a body portion, a first sidewall, a second sidewall, and a shielding portion; the first sidewall and the second sidewall are arranged opposite to each other along a third direction and protrude from the body portion in a direction away from the battery cell, and the first direction, the second direction, and the third direction are perpendicular to each other; the shielding portion is connected to the first sidewall and bends relative to the first sidewall and extends towards the second sidewall, and there is a gap between the shielding portion and the second sidewall; the body portion, the first sidewall, the second sidewall, and the shielding portion together form a harness receiving space, and the sampling harness is used to enter the harness receiving space from the gap.

[0042] In the battery device of this application embodiment, the fixing member, consisting of the main body, the first sidewall, the second sidewall, and the bent shielding part, forms a wire harness accommodating space, providing a relatively enclosed physical protective barrier for the sampling wire harness. Under extreme conditions such as thermal runaway of a single battery cell, this barrier can prevent high-temperature emissions from the battery cell from directly contacting and corroding the sampling wire harness, reducing the risk of short circuits caused by melting of the wire harness skin and improving the overall reliability of the battery device. Simultaneously, the gap between the shielding part and the second sidewall forms an opening for the sampling wire harness to enter the wire harness accommodating space, allowing the sampling wire harness to directly enter the space through the gap. This saves time-consuming manual wire arrangement and cumbersome processes such as cable ties, effectively improving the assembly efficiency of the battery device while reducing material and labor costs. Furthermore, sampling wire harnesses bound with cable ties are typically cylindrical, occupying a large space in the second direction, while sampling wire harnesses without cable ties are more flexible in shape and can accommodate more within a limited wire harness accommodating space. In addition, the fastener is set as an integrally molded structure extending along the first direction. This continuous structure itself has good overall rigidity, which reduces the possibility of bending and breaking of long strip parts during assembly, and can reduce mold development and manufacturing costs.

[0043] Figure 1 A partial structural schematic diagram of the battery device 10 according to an embodiment of this application is shown. Figure 1 As shown, the battery device 10 of this application embodiment may include at least one battery cell assembly 12, and each battery cell assembly 12 includes multiple battery cells 20. The multiple battery cells 20 may be connected in parallel, series, or a combination thereof to meet different power usage requirements. The shape of the battery device 10 of this application embodiment can be configured according to actual applications. For example, the battery device 10 may be as follows: Figure 1 The cuboid shown can also be different. Figure 1 The embodiments shown are cylindrical or other shapes, but are not limited to these.

[0044] It should be understood that, such as Figure 1 As shown, the battery device 10 of this embodiment may further include a housing 11, which can be used to accommodate at least one battery cell assembly 12. The housing 11 of this embodiment has a hollow interior, and at least one battery cell assembly 12 is accommodated within the housing 11. The housing 11 may include two parts, referred to herein as a first housing portion 111 and a second housing portion 112, which are fastened together. The shapes of the first housing portion 111 and the second housing portion 112 can be determined according to the shape of the components housed inside, for example, according to the shape of the combination of at least one battery cell assembly 12 housed inside. At least one of the first housing portion 111 and the second housing portion 112 has an opening. For example, as... Figure 1As shown, the first box portion 111 and the second box portion 112 can both be hollow cuboids and each has an open face. The openings of the first box portion 111 and the second box portion 112 are arranged opposite to each other, and the first box portion 111 and the second box portion 112 are interlocked to form a box 11 with a closed chamber, which can be used to accommodate at least one battery cell assembly 12.

[0045] For example, unlike Figure 1 As shown, either the first housing portion 111 or the second housing portion 112 may have only one hollow cuboid with an opening, while the other is plate-shaped to cover the opening. Taking the second housing portion 112 as a hollow cuboid with one opening and the first housing portion 111 as a plate-shaped example, then the first housing portion 111 covers the opening of the second housing portion 112 to form a housing 11 with a closed chamber, which can be used to accommodate at least one battery cell assembly 12.

[0046] Figure 2 A partial structural schematic diagram of the battery device 10 according to an embodiment of this application is shown, for example, Figure 2 It can be like Figure 1 A schematic diagram of a partial structure of the battery device 10 shown. (As shown) Figure 1 and Figure 2 As shown, the battery device 10 includes a battery cell assembly 12, a sampling harness 13, and a fixing member 14. Figure 3 Another partial structural schematic diagram of the battery device 10 according to an embodiment of this application is shown, for example, Figure 3 A schematic diagram of the structure of the fixing member 14 provided with the sampling harness 13 is shown; Figure 4 An exploded view of a partial structure of the battery device 10 according to an embodiment of this application is shown, for example, Figure 4 This diagram shows the sampling harness 13 before it is installed on the fixture 14; Figure 5 A cross-sectional schematic diagram of a portion of the structure of the fastener 14 according to an embodiment of this application is shown, wherein the cross-section is perpendicular to the extending direction of the fastener 14.

[0047] In this embodiment, the battery cell assembly 12 includes a plurality of battery cells 20 arranged along a first direction X; a sampling harness 13 is used to collect status information of at least one battery cell 20; a fixing member 14 is integrally formed and extends along the first direction X, and the fixing member 14 is located on one side of the battery cell assembly 12 along the second direction Y; the fixing member 14 includes a body portion 141, a first sidewall 143, a second sidewall 144, and a blocking portion 142; the first sidewall 143 and the second sidewall 144 are disposed opposite to each other along a third direction Z and are located from the body portion X. The body portion 141 protrudes away from the battery cell 20, with the first direction X, the second direction Y, and the third direction Z perpendicular to each other; the shielding portion 142 is connected to the first sidewall 143 and bends relative to the first sidewall 143 and extends towards the second sidewall 144, with a gap 145 between the shielding portion 142 and the second sidewall 144; the body portion 141, the first sidewall 143, the second sidewall 144, and the shielding portion 142 together form a wire harness receiving space 146, and the sampling wire harness 13 is used to enter the wire harness receiving space 146 from the gap 145.

[0048] The battery device 10 mentioned in the embodiments of this application may include one or more battery cell assemblies 12 for providing voltage and capacity. The battery cell assembly 12 may include multiple battery cells 20, which are connected in series, parallel, or mixed connections via a busbar. For example, this application embodiment uses a battery cell assembly 12 comprising multiple battery cells 20 arranged along a first direction X, where the first direction X may be the thickness direction of the battery cells 20, but this application embodiment is not limited to this. Furthermore, different battery cell assemblies 12 may include the same or different numbers of battery cells 20 to flexibly adapt to different application scenarios.

[0049] As an example, the battery cell 20 in this application embodiment can be a cylindrical battery cell, a prismatic battery cell, a pouch battery cell, or a battery cell 20 of other shapes. Prismatic battery cells include prismatic battery cells, blade-shaped battery cells, and multi-prismatic battery cells. For example, a hexagonal prismatic battery cell is a multi-prismatic battery cell. This application has no particular limitations.

[0050] In some embodiments, the battery cell assembly 12 is typically formed by arranging a plurality of battery cells 20.

[0051] As an example, the battery cell assembly 12 can be a battery module, which is formed by arranging and fixing multiple battery cells 20 into an independent module. As an example, the battery module can be formed by bundling multiple battery cells together with cable ties.

[0052] In some embodiments, the battery device 10 may be a battery pack, for example, the battery pack includes a housing 11 and one or more battery cell assemblies 12, the battery cell assemblies 12 being housed in the housing 11.

[0053] As an example, the battery cell assembly 12 can be a battery module, and the battery cell assembly 12 can be housed in the housing 11 by fixing the battery module in the housing 11.

[0054] As an example, the battery cell assembly 12 can also be housed in the housing 11 by directly fixing multiple battery cells 20 to the housing 11.

[0055] The battery device 10 in this embodiment further includes a sampling harness 13 for acquiring state information of at least one battery cell 20. Exemplarily, the sampling harness 13 may include at least one voltage acquisition line and at least one temperature acquisition line. Each voltage acquisition line can be used to acquire the voltage of the corresponding battery cell 20 to determine whether the voltage of the battery cell 20 is abnormal; each temperature acquisition line can be used to sample the temperature of the corresponding battery cell 20 to determine whether the temperature of the battery cell 20 is abnormal.

[0056] In some embodiments, the number of voltage acquisition lines and temperature acquisition lines included in the sampling harness 13 can be set according to the number of battery cells 20 included in the battery device 10, so as to acquire the voltage and / or temperature of at least a portion of the battery cells 20.

[0057] The battery device 10 in this embodiment of the application further includes a fixing member 14, which is disposed on one side of the battery cell assembly 12 along the second direction Y. For example, in this embodiment of the application, the second direction Y is the height direction of the battery cell 20. The fixing member 14 can be used to fix the sampling harness 13.

[0058] Specifically, such as Figures 2 to 5 As shown, the fixing member 14 includes a body portion 141, a first sidewall 143, a second sidewall 144, and a blocking portion 142. The first sidewall 143 and the second sidewall 144 are disposed opposite each other along a third direction Z, and protrude from the body portion 141 in a direction away from the battery cell 20, so that the body portion 141, the first sidewall 143, and the second sidewall 144 can form an approximately groove-like structure. In this embodiment, the first direction X, the second direction Y, and the third direction Z are perpendicular to each other.

[0059] Furthermore, the shielding portion 142 is connected to the first sidewall 143 and bends relative to the first sidewall 143, extending towards the second sidewall 144. The shielding portion 142 and the main body portion 141 are disposed opposite each other along the second direction Y, so that the main body portion 141, the first sidewall 143, the second sidewall 144, and the shielding portion 142 together form a wire harness receiving space 146, that is, the main body portion 141, the first sidewall 143, the second sidewall 144, and the shielding portion 142 can form a hollow structure. However, there is a gap 145 between the shielding portion 142 and the second sidewall 144, that is, the shielding portion 142 is not connected to the second sidewall 144, so that the sampling wire harness 13 can enter the wire harness receiving space 146 through the gap 145 to accommodate the sampling wire harness.

[0060] The sampling harness 13 can directly enter the harness accommodating space 146 through the gap 145. For example, the sampling harness 13 can enter the harness accommodating space 146 one by one through the gap 145, allowing the harness accommodating space 146 to store the sampling harness 13 without it being bound by cable ties. This saves time-consuming manual cable management and tedious cable ties, reducing material and labor costs while effectively improving the assembly efficiency of the battery device. Furthermore, the sampling harness 13 bound by cable ties is usually cylindrical, occupying a large space in the second direction Y. The sampling harness 13 without cable ties is more flexible in shape and can accommodate more sampling lines within the limited harness accommodating space 146. For example, as... Figures 2 to 5 As shown, for a wire harness accommodating space 146 with a rectangular cross-section, the sampling wire harness 13, which is not bound by cable ties, can make full use of the internal space of the wire harness accommodating space 146 to accommodate a larger number of sampling wire harnesses 13.

[0061] In addition, the fixing member 14, together with the body part 141, the first side wall 143, the second side wall 144 and the bent shielding part 142, forms a wire harness accommodating space 146, which provides a relatively closed physical protective barrier for the sampling wire harness 13. Under extreme conditions such as thermal runaway of the battery cell 20, this barrier can prevent the high-temperature emissions emitted by the battery cell 20 from directly contacting and corroding the sampling wire harness 13, reducing the risk of short circuit caused by the melting of the wire harness skin and improving the overall reliability of the battery device.

[0062] In this embodiment, the fastener 14 is an integrally formed structure extending along the first direction X. This continuous structure itself has excellent overall rigidity, which reduces the possibility of bending and breaking of long strip parts during assembly, and can reduce mold development and manufacturing costs.

[0063] In some embodiments, the fastener 14 is manufactured by extrusion molding. Compared to traditional injection molding and other processes, the extruded fastener 14 offers greater processing flexibility. When the number of battery cells 20 included in the battery cell assembly 12 varies, and the assembly 12 is adapted to different lengths of battery cell assemblies 12, the corresponding length of profile can be cut, eliminating the need to develop new molds of enormous size and greatly reducing mold costs. Furthermore, the long strip-shaped extruded profile is less prone to bending and breakage, improving molding reliability. For battery devices 10 with high energy density, this can effectively improve the structural stability of the battery device 10.

[0064] It should be understood that the material of the fastener 14 can be selected according to the actual application. For example, the fastener 14 is typically made of a rigid composite material to improve its structural stability. Exemplarily, the material of the fastener 14 may include at least one of the following: polyoxymethylene (POM), polypropylene (PP), polycarbonate (PC), polyolefin (PO), glass fiber, or glass fiber composites. These materials have good insulation, ductility, and structural strength. Fasteners 14 made using these materials are not easily bent or broken even when their overall length is long, and can maintain morphological stability under conditions such as heat generation and vibration of the battery cell 20, thus improving the reliability of the fastener 14.

[0065] In some embodiments, the fastener 14 is made of POM, PP, PC, PO, or glass fiber to facilitate implementation.

[0066] It should be understood that the specific structure of the wire harness accommodating space 146 in this application embodiment can be set according to actual application.

[0067] In some embodiments, the fixing member 14 includes an elastic connecting portion 147 connected to the shielding portion 142 and the first sidewall 143. The elastic connecting portion 147 is used for the shielding portion 142 to elastically swing relative to the first sidewall 143 to increase the gap 145 so that the sampling wire harness 13 enters the wire harness receiving space 146, or to decrease the gap 145 to restrict the sampling wire harness 13 from coming out of the wire harness receiving space 146.

[0068] like Figures 2 to 5As shown, when assembling the sampling harness 13, the elastic connecting part 147 allows the blocking part 142 to elastically swing to increase the gap 145, making it easier for the sampling harness 13 to be smoothly inserted into the harness receiving space through the increased gap 145. After insertion, the elastic connecting part 147 causes the blocking part 142 to elastically rebound to reduce the gap 145, thus forming a limiting constraint on the sampling harness 13 in the harness receiving space 146. This reduces the possibility of the sampling harness 13 coming out of the harness receiving space 146 under vibration or other conditions, and improves the stability of the wiring.

[0069] It should be understood that the elastic connection portion 147 in the embodiments of this application can be implemented in various ways. For example, the elastic connection portion 147 can be made of an elastic material so that the elastic connection portion 147 can deform more easily when subjected to force, thereby realizing the elastic swing of the blocking portion 142. Alternatively, the elastic connection portion 147 can be thinned.

[0070] In some embodiments, the thickness T1 of the elastic connection 147 is less than the thickness T3 of the first sidewall 143 and less than the thickness T2 of the shielding portion 142. This localized thinning design makes the elastic connection 147 more prone to deformation under stress, reducing the force required to open the gap 145 and facilitating the elastic swing of the shielding portion 142. Simultaneously, maintaining the relatively thick first sidewall 143 and shielding portion 142 still ensures good structural rigidity, balancing the flexible assembly requirements of the fastener 14 with overall structural strength.

[0071] It should be understood that the thickness T1 of the elastic connection portion 147 in this embodiment can be set according to the thickness T3 of the first sidewall 143 and / or the thickness T2 of the shielding portion 142.

[0072] In some embodiments, the ratio of the thickness T1 of the elastic connection portion 147 to the thickness T3 of the first sidewall 143 is greater than or equal to 0.25 and less than or equal to 0.75; and / or, the ratio of the thickness T1 of the elastic connection portion 147 to the thickness T2 of the shielding portion 142 is greater than or equal to 0.25 and less than or equal to 0.75. By setting the ratio of the thickness T1 of the elastic connection portion 147 to the thickness T3 of the first sidewall 143 to be greater than or equal to 0.25, and / or the ratio of the thickness T1 of the elastic connection portion 147 to the thickness T2 of the shielding portion 142 to be greater than or equal to 0.25, the risk of fatigue fracture of the elastic connection portion 147 under repeated bending can be reduced, thereby improving structural stability. Meanwhile, by setting the ratio of the thickness T1 of the elastic connection 147 to the thickness T3 of the first sidewall 143 to be less than or equal to 0.75, and / or the ratio of the thickness T1 of the elastic connection 147 to the thickness T2 of the blocking part 142 to be less than or equal to 0.75, the bending resistance can be limited to prevent excessive bending, thus facilitating the elastic swing of the blocking part 142. This ratio range allows the elastic connection 147 to have sufficient bending toughness while possessing a long fatigue life, thereby improving the service life and reliability of the fastener 14.

[0073] In some embodiments, the ratio of the thickness T1 of the elastic connection portion 147 to the thickness T3 of the first sidewall 143 and / or the ratio of the thickness T1 of the elastic connection portion 147 to the thickness T2 of the blocking portion 142 may be any of the following values ​​or between any two of the following values: 0.25, 0.3, 0.35, 0.4, 0.45, 0.48, 0.5, 0.53, 0.55, 0.6, 0.65, 0.7 or 0.75.

[0074] In some embodiments, a first structure 1421 is connected to the end of the blocking portion 142 near the second sidewall 144, and the first structure 1421 is bent relative to the blocking portion 142 in a direction away from the second sidewall 144. For example... Figures 2 to 5 As shown, the first structure 1421, which bends outward relative to the shielding portion 142, can facilitate the application of external force to the shielding portion 142. For example, when inserting the sampling harness 13, the shielding portion 142 can be lifted by pulling or squeezing the first structure 1421 outward to increase the size of the gap 145, making it easier for the sampling harness 13 to enter the harness receiving space 146.

[0075] In some embodiments, a second structure 1422 is connected to the end of the blocking portion 142 near the second sidewall 144. The second structure 1422 is bent relative to the blocking portion 142 toward the second sidewall 144 to block at least a portion of the gap 145. Figures 2 to 5As shown, the second structure 1422, which bends inward relative to the shielding portion 142, covers at least a portion of the gap 145. After the sampling harness 13 enters the harness receiving space 146, the second structure 1422 can limit the risk of the sampling harness 13 coming out through the gap 145, thereby improving the stability of the sampling harness 13.

[0076] It should be understood that the structure of the battery cell 20 in this application embodiment can be set according to actual application. Figure 6 A schematic diagram of the structure of a battery cell 20 according to an embodiment of this application is shown. For example, the battery cell 20 is shown. Figure 6 The battery cell 20 shown can be as follows: Figure 2 Any one of the multiple battery cells 20 shown.

[0077] In some embodiments, such as Figure 6 As shown, the battery cell 20 includes a casing 21, which can be a steel casing, an aluminum casing, a plastic casing (such as a polypropylene casing), a composite metal casing (such as a copper-aluminum composite casing), or an aluminum-plastic film, etc. In some embodiments, the casing 21 can be a sealed structure or a non-sealed structure. As an example, when the casing 21 is a non-sealed structure, the casing 21 serves to protect the internal electrode assembly, and a sealing bag is also included between the casing 21 and the electrode assembly. The sealing bag is used to encapsulate the electrode assembly and electrolyte. Specifically, the sealing bag can be a bag-shaped insulating component or an aluminum-plastic film. When the casing 21 is a sealed structure, it is used to encapsulate components such as the electrode assembly and electrolyte.

[0078] In some embodiments, the housing 21 includes an end cap and a housing, the housing having an opening, and the end cap covering the opening. The housing may have one or more openings. The end cap may also be provided one or more.

[0079] In some embodiments, the battery cell 20 includes a first wall 211 facing the fixing member 14, the first wall 211 being provided with a pressure relief mechanism 212 for discharging internal gas from the battery cell 20.

[0080] As an example, when the internal pressure or temperature of the battery cell 20 reaches a predetermined threshold, the pressure relief mechanism 212 is actuated to release the internal pressure or temperature. When the internal pressure or temperature of the battery cell 20 reaches the predetermined threshold, the pressure relief mechanism 212 performs an action or a weak structure provided in the pressure relief mechanism 212 is destroyed, thereby forming an opening or channel for the release of internal pressure or temperature. This threshold design varies depending on design requirements. The threshold may depend on the materials of one or more of the positive electrode, negative electrode, electrolyte, and separator in the battery cell 20.

[0081] As an example, the pressure relief mechanism 212 can be integrally formed with the first wall 211. Alternatively, the pressure relief mechanism 212 can be separately configured and connected to the first wall 211.

[0082] The term "actuation" as used in this application refers to the pressure relief mechanism 212 being activated or turned to a preset state, thereby releasing the internal pressure and temperature of the battery cell 20. The actions of the pressure relief mechanism 212 may include, but are not limited to: movement of components within the pressure relief mechanism 212 to form an exhaust channel, rupture, breakage, tearing, or opening of at least a portion of the pressure relief mechanism 212, etc. When the pressure relief mechanism 212 is actuated, the high-temperature, high-pressure substances inside the battery cell 20 are discharged outwards from the actuated portion as exhaust materials. This method enables pressure and temperature relief of the battery cell 20 under controllable pressure or temperature conditions, thereby reducing the probability of potentially more serious accidents.

[0083] In some embodiments, when the housing 21 is a non-sealed structure, the pressure relief mechanism 212 can be configured as a through hole for discharging gas inside the battery cell 20.

[0084] The emissions from the battery cell 20 mentioned in this application include, but are not limited to: electrolyte, dissolved or split positive and negative electrode plates, fragments of separators, high-temperature and high-pressure gases generated by the reaction, flames, etc.

[0085] In some embodiments, when the pressure relief mechanism 212 is disposed on the first wall 211 facing the fixing member 14, a pressure relief area 1411 is provided in the region of the body portion 141 located outside the wiring harness receiving space 146. The pressure relief area 1411 is used to discharge the emissions from the battery cell 20 when the pressure relief mechanism 212 is actuated. On the one hand, the pressure relief area 1411 does not obstruct the discharge of emissions, thereby improving the reliability of the battery cell 20; on the other hand, since the pressure relief area 1411 is located outside the wiring harness receiving space 146, this spatial isolation design reduces direct contact between high-temperature emissions and the sampling wiring harness 13, thereby reducing the risk of electrical short circuits caused by the melting of the outer casing.

[0086] It should be understood that the pressure relief area 1411 in this embodiment can be implemented in various ways. For example, the pressure relief area 1411 can be a through hole, that is, the pressure relief area 1411 is a through hole penetrating the body portion 141 of the fixing member 14, so that the discharge discharged through the pressure relief mechanism 212 can be quickly discharged through the through hole, thereby improving the discharge efficiency of the discharge. For example, if the fixing member 14 is processed by extrusion forming, the pressure relief area 1411 can be obtained by drilling after extruding the fixing member 14.

[0087] Alternatively, the pressure relief zone 1411 can also be a weak area provided on the fixing member 14. When the pressure relief mechanism 212 is actuated, the weak area can be destroyed by the high-temperature and high-pressure discharge, so that the discharge can be discharged through the destroyed pressure relief zone 1411 to the side of the fixing member 14 away from the battery cell 20. For example, the weak area can be a thinner area of ​​the fixing member 14, or the weak area can include a temperature-sensitive or pressure-sensitive material so as to be destroyed by the high-temperature and high-pressure discharge.

[0088] In some embodiments, the fastener 14 includes two wire harness receiving spaces 146 arranged along the third direction Z; along the third direction Z, a pressure relief area 1411 is located between the two wire harness receiving spaces 146 to make full use of the space on both sides of the pressure relief mechanism 212, facilitating the storage of more sampling wire harnesses 13 and improving the integration of the components. In addition, the wire harness receiving spaces 146 located on both sides can also restrict the emission path of the emissions, guiding the emissions to be discharged in a concentrated manner along a specific path, thereby improving the reliability of exhaust.

[0089] In some embodiments, the body portion 141 includes a plurality of pressure relief regions 1411 arranged at intervals along a first direction X. The plurality of pressure relief regions 1411 correspond one-to-one with the pressure relief mechanisms 212 of a plurality of battery cells 20, so that any battery cell 20 that experiences thermal runaway has a corresponding exhaust channel, reducing the retention of emissions between battery cells 20, improving exhaust efficiency, reducing the risk of thermal diffusion between adjacent battery cells 20, and improving the reliability of the battery device 10.

[0090] In some embodiments, the body portion 141 may further include a pressure relief region 1411 extending along a first direction X, the pressure relief region 1411 corresponding to the pressure relief mechanism 212 of a plurality of battery cells 20, so as to reduce the number of pressure relief regions 1411 and simplify the processing.

[0091] In the embodiments of this application, such as Figure 6 As shown, the battery cell 20 further includes at least one electrode terminal 213, which is used to electrically connect to the tabs of the internal electrode assembly to output electrical energy from the battery cell 20. The electrode terminal 213 can be directly connected to the tabs of the electrode assembly or indirectly connected to the tabs via a current collector. For example, the battery cell 20 may include at least one positive electrode terminal and at least one negative electrode terminal, wherein the positive electrode terminal is used to electrically connect to the positive tab, and the negative electrode terminal is used to electrically connect to the negative tab.

[0092] In this embodiment of the application, all electrode terminals 213 of the battery cell 20 can be located on any one or more walls of the battery cell 20, that is, different electrode terminals 213 can be located on the same wall or different walls of the battery cell 20. For example, Figure 6As shown, the embodiments of this application mainly take the battery cell 20 including two electrode terminals 213 as an example, and the two electrode terminals 213 are both located on the same wall of the battery cell 20. Here, it is taken that the two electrode terminals 213 are both located on the first wall 211 as an example, but the embodiments of this application are not limited to this.

[0093] In some embodiments, the battery device 10 further includes a busbar 15, which is electrically connected to the electrode terminal 213 to achieve electrical connection of multiple battery cells 20. For example, the busbar 15 can be electrically connected to the electrode terminal 213 by soldering, but the embodiments of this application are not limited thereto.

[0094] In some embodiments, a first fixing area 1412 is provided in the area of ​​the body portion 141 located outside the wire harness receiving space 146. The first fixing area 1412 is fixedly connected to the busbar component 15 to improve the structural stability of the fixing member 14 and the busbar component 15.

[0095] In some embodiments, the sampling harness 13 includes a sampling end 131 extending out of the harness receiving space 146. The sampling end 131 may be disposed on the busbar component 15. For example, the sampling end 131 may be located on the side of the busbar component 15 away from the battery cell 20 or on the side facing the battery cell 20, so as to determine the voltage and / or temperature of the battery cell 20 by collecting the voltage and / or temperature of the busbar component 15.

[0096] In some embodiments, when assembling the battery device 10, the sampling end 131 of the sampling harness 13 can be installed and fixed to the busbar component 15 first. For example, the sampling end 131 of the sampling harness 13 can be provided on at least some of the busbar components 15 included in the battery device 10 by means of welding or bonding. Then, the busbar component 15 is fixed to the fixing member 14, and each sampling line in the sampling harness 13 is placed in the harness receiving space 146 in sequence to accommodate the sampling harness 13.

[0097] It should be understood that the fixing method between the fixing member 14 and the busbar component 15 in the embodiments of this application can be set according to actual applications.

[0098] In some embodiments, the fastener 14 further includes a limiting portion 148, which is connected to the first fixing region 1412 and is disposed opposite to the first fixing region 1412 along the second direction Y; the busbar component 15 includes a second fixing region 1512, which is located between the first fixing region 1412 and the limiting portion 148. By clamping the second fixing region 1512 of the busbar component 15 between the first fixing region 1412 and the limiting portion 148, the movement of the busbar component 15 in the second direction Y can be restricted, and compared with fixing the busbar component 15 with a single-layer structure, a higher connection strength can be achieved, improving the tightness of the busbar component 15 assembled on the fastener 14.

[0099] In some embodiments, the limiting portion 148 is connected to the end of the second sidewall 144 away from the body portion 141, and is bent relative to the second sidewall 144 in a direction away from the blocking portion 142, so as to connect the limiting portion 148 and the first fixing area 1412 through the second sidewall 144, such that the limiting portion 148 and the first fixing area 1412 are disposed opposite each other along the second direction Y. This structure reuses the second sidewall 144, which is used to form the wire harness receiving space 146, as a component for the mutual connection between the limiting portion 148 and the body portion 141, making the overall structure of the fastener 14 more compact, reducing the material and third-direction Z space required for the additional component for the mutual connection between the limiting portion 148 and the body portion 141, and improving space utilization.

[0100] Figure 7 A schematic diagram of the structure of the bus component 15 according to an embodiment of this application is shown. For example, the... Figure 7 The busbar component 15 shown can be Figures 2 to 4 A schematic diagram of the structure of any one of the busbar components 15 shown.

[0101] In some embodiments, the busbar component 15 includes two connecting portions 151 and a transition portion 152; the transition portion 152 is connected to the two connecting portions 151 and located between the two connecting portions 151 along a first direction X; the transition portion 152 protrudes relative to the connecting portions 151 in a direction away from the battery cell 20; the connecting portion 151 includes a connecting area 1511 and a second fixing area 1512 arranged along a third direction Z, the connecting area 1511 being used for electrical connection with the electrode terminal 213. The protruding transition portion 152 can form at least one elastic arch-like buffer structure, when the multiple battery cells 20 electrically connected to the busbar component 15 undergo thermal expansion and contraction or slight deflection, the transition portion 152 can absorb and release the corresponding stress through its own elastic deformation, reducing the direct transmission of tensile force to the connecting area 1511, and reducing the risk of electrical connection failure between the busbar component 15 and the electrode terminal 213. Furthermore, the second fixing region 1512 and the connecting region 1511 included in the connecting part 151 are arranged along the third direction Z, so that when the second fixing region 1512 is fixed relative to the fixing member 14, the relative stability between the fixing member 14, the bus member 15 and the electrode terminal 213 can also be improved.

[0102] It should be understood that different structures of the busbar component 15 can be applied to different structures of the fastener 14.

[0103] In some embodiments, such as Figures 2 to 7 As shown, along the first direction X, the transition portion 152 connects to the connection area 1511 of the two connecting portions 151 and is located between the connection areas 1511 of the two connecting portions 151; along the third direction Z, the second fixing area 1512 protrudes from the transition portion 152 relative to the connecting area 1511, so that when the second fixing area 1512 is clamped between the limiting portion 148 and the first fixing area 1412, the transition portion 152 is located outside the limiting portion 148 and the first fixing area 1412, the limiting portion 148 has little impact on the transition portion 152, and it is convenient to install the busbar component 15.

[0104] Alternatively, the busbar component 15 may have other structures. Figure 8 A partial structural schematic diagram of a battery device 10 according to another embodiment of this application is shown, for example, Figure 8 A schematic diagram of the structure of the fixing member 14 provided with the sampling harness 13 is shown in another embodiment; Figure 9 A schematic diagram of the structure of the fastener 14 according to another embodiment of this application is shown. For example, the... Figure 9 It shows Figure 8 A schematic diagram of the fastener 14 in the middle; Figure 10 A schematic diagram of the structure of a bus component 15 according to another embodiment of this application is shown. For example, the... Figure 10 The busbar component 15 shown can be Figure 8A schematic diagram of the structure of any one of the busbar components 15 shown.

[0105] In some embodiments, the fastener 14 includes a plurality of limiting portions 148 spaced apart along a first direction X, and a portion of the transition portion 152 is accommodated within the interval between two adjacent limiting portions 148 along the first direction X. Figures 8 to 10 As shown, the transition portion 152 is disposed between the two connecting portions 151, and the second fixing area 1512 of the connecting portion 151 may not protrude relative to the transition portion 152; when the second fixing area 1512 is clamped between the limiting portion 148 and the first fixing area 1412, the transition portion 152 may be located within the interval between two adjacent limiting portions 148, which can provide clearance space for the transition portion 152; furthermore, the two limiting portions 148 can also form a blockage along the first direction X on the transition portion 152, further restricting the movement of the busbar component 15 and improving the fixing effect.

[0106] In some embodiments, if the fastener 14 is processed by extrusion molding, for example... Figures 2 to 7 In the embodiment shown, the limiting part 148 does not need to avoid the transition part 152, and the processing of the fastener 14 is simpler; for example, Figures 8 to 10 In the embodiment shown, the continuous limiting portions 148 can be further partially truncated to form a plurality of limiting portions 148 arranged at intervals along the first direction X.

[0107] It should be understood that the second fixing area 1512 of the busbar component 15 in this application embodiment can be fixed to the fixing member 14 in a variety of ways to suit different application scenarios.

[0108] Figure 11 A cross-sectional view of a portion of the structure of the fastener 14 and the busbar 15 according to an embodiment of this application is shown. The cross-section is perpendicular to the extension direction of the fastener 14, i.e., perpendicular to the first direction X.

[0109] In some embodiments, such as Figure 11 As shown, the limiting part 148 is provided with a protruding structure 1481 protruding toward the second fixing area 1512, and the second fixing area 1512 is provided with a recessed groove structure or through hole 1513 in the direction away from the limiting part 148. At least a portion of the protruding structure 1481 is accommodated in the groove structure or through hole 1513 to achieve relative fixation between the second fixing area 1512 and the limiting part 148, thereby achieving relative fixation between the busbar component 15 and the fixing member 14. The structure is simple and easy to implement.

[0110] In some embodiments, such as Figure 11As shown, taking the second fixing region 1512 with a through hole 1513 as an example, at least a portion of the protruding structure 1481 protruding towards the second fixing region 1512 is accommodated in the through hole 1513. The processing method of the protruding structure 1481 on the limiting part 148 can be set according to the actual application.

[0111] In some embodiments, the protrusion structure 1481 is processed by heat melting. For example, when the second fixing region 1512 is clamped between the limiting portion 148 and the first fixing region 1412, the protrusion structure 1481 can be formed by heat melting of the area of ​​the limiting portion 148 corresponding to the through hole 1513. The heat melting process allows the limiting portion 148 of the fastener 14 to fill the through hole 1513 in a molten state, and after cooling and solidification, a seamless fit is formed. This method eliminates the need for additional external fasteners such as screws, which not only reduces the overall weight but also reduces the types of materials and the complexity of the assembly process, thereby improving assembly efficiency.

[0112] Figure 12 A cross-sectional schematic diagram of a partial structure of the fastener 14 and the busbar 15 according to another embodiment of this application is shown. The cross-section is perpendicular to the extension direction of the fastener 14, that is, perpendicular to the first direction X.

[0113] In some embodiments, such as Figure 12 As shown, the limiting part 148, the second fixing area 1512, and the first fixing area 1412 are fixedly connected by a connector 16, which passes through the limiting part 148, the second fixing area 1512, and the first fixing area 1412 along the second direction Y. For example, the connector 16 can be a rivet, so that the limiting part 148, the second fixing area 1512, and the first fixing area 1412 are riveted and fixed together. Alternatively, the connector 16 can also be a bolt or other fastener; the embodiments of this application are not limited thereto.

[0114] The fastener 14 and the busbar component 15 can be relatively fixed by the connector 16 passing through the limiting part 148, the second fixing area 1512 and the first fixing area 1412, which can improve the stability of the structure.

[0115] In some embodiments, the first wall 211 has two electrode terminals 213 arranged along the third direction Z; along the second direction Y, the fastener 14 is located between the two electrode terminals 213 to make full use of the area between the two electrode terminals 213, reduce the additional stacking of components in the second direction Y, further reduce the size of the battery device 10 in the second direction Y, and increase the energy density of the battery device 10.

[0116] In some embodiments, when a pressure relief mechanism 212 is provided on the first wall 211 of the battery cell 20, the pressure relief mechanism 212 may be located between two electrode terminals 213 along the third direction Z; further, the fixing member 14 may include two wire harness receiving spaces 146 arranged along the third direction Z, the two wire harness receiving spaces 146 being located on both sides of the pressure relief mechanism 212, and each wire harness receiving space 146 being located between the pressure relief mechanism 212 and the corresponding electrode terminal 213, so as to make full use of the space in the third direction Z, thereby improving the energy density of the battery device 10.

[0117] According to some embodiments of this application, this application also provides an electrical device including a battery device 10 of any of the above schemes, and the battery device 10 is used to provide electrical energy to the electrical device.

[0118] The electrical equipment described in this application can refer to various devices that use individual battery cells, such as mobile phones, portable devices, laptops, electric vehicles, electric toys, power tools, vehicles, ships, and spacecraft. For example, spacecraft include airplanes, rockets, space shuttles, and spacecraft.

[0119] This application provides an energy storage device including one or more battery clusters to increase the voltage and capacity of the energy storage device. The battery cluster may include multiple battery devices, which are connected in series via a busbar to increase the voltage of the energy storage device. When the energy storage device includes multiple battery clusters, the multiple battery clusters are connected in parallel to increase the capacity of the energy storage device.

[0120] Energy storage devices can be used in energy storage power stations, wind power generation systems, solar power generation systems, mobile power systems, or temporary power supply systems. Energy storage devices can store electrical energy as needed and output it when appropriate. For example, an energy storage device can store electrical energy during off-peak hours and provide power to relevant users or electrical devices during peak hours. The energy storage system provided in this application embodiment can be any power system that requires energy storage devices.

[0121] In some embodiments, the energy storage device is an energy storage container or an energy storage cabinet.

[0122] In some embodiments, the energy storage device may include a cabinet and one or more battery clusters housed within the cabinet.

[0123] In some embodiments, the energy storage device may include modules such as a thermal management module, a main control module, a central control module, a power distribution module, and a fire protection module.

[0124] As an example, the thermal management module may include a liquid cooling unit that supplies coolant to each battery device via piping to regulate the temperature of the individual battery cells.

[0125] As an example, the main control module can serve as the battery management unit for the battery cluster, used to monitor and manage the battery cluster. The main control module can monitor information such as the current, voltage, power, or temperature of the battery cluster. For instance, it can control the charging and discharging current and voltage of the battery cluster. The main control module includes modules such as an auxiliary battery management unit (SBMU) and a fusion switch.

[0126] As an example, the central control module can serve as the battery management unit for energy storage device 1, used to monitor and manage energy storage device 1. The central control module can monitor information such as current, voltage, power, state of charge, or temperature of energy storage device 1. For example, it can control the charging and discharging current and voltage of energy storage device 1. As an example, the central control module includes modules such as an insulation monitoring module (IMM), a master battery management unit (MBMU), an Ethernet (ETH) module, and a fiber optic conversion module.

[0127] As an example, the fire protection module includes a control panel, detectors, alarm devices, etc., used to detect, alarm, or extinguish fires in the energy storage system.

[0128] As an example, the power distribution unit can be used to distribute power to the power modules of the energy storage device.

[0129] According to some embodiments of this application, this application also provides an energy storage system, including an energy storage device 1 of any of the above schemes. Figure 13 A structural block diagram of an energy storage system according to an embodiment of this application is shown. In some embodiments, such as... Figure 13 As shown, the energy storage system may include one or more energy storage devices 1 and a power converter system (PCS) 2, wherein the power converter 2 is used to connect between the power generation device 3 and the energy storage device 1. The power generation device 3 is used to generate electrical energy, and the electrical energy generated by the power generation device 3 can be stored in the energy storage device 1 through the power converter 2. As an example, the power generation device 3 may specifically be a solar panel, a hydroelectric power generation device, a thermal power generation device, a wind power generation device, etc. The specific type of the power generation device 3 is not limited in this application.

[0130] According to some embodiments of this application, this application provides a charging network. Figure 14 A structural block diagram of a charging network according to an embodiment of this application is shown. Figure 14As shown, the charging network includes a charging pile 4 and an energy storage device 1. The charging pile 4 is electrically connected to the energy storage device 1, which provides power to the charging pile 4. The charging pile 4 is electrically connected to a battery device in the energy storage device 1 via a cable, allowing the battery device to supply its stored energy to the charging pile 4. The charging pile 4 has one or more connectors 5 for connecting to electrical devices (such as vehicles) to replenish their power.

[0131] The energy storage device 1 can be located inside the charging pile (e.g., an integrated energy storage and charging unit) or outside the charging pile.

[0132] According to some embodiments of this application, see Figures 2 to 12 This application provides a battery device 10, including: a battery cell assembly 12, the battery cell assembly 12 including a plurality of battery cells 20 arranged along a first direction X; a sampling harness 13 for collecting state information of at least one battery cell 20; a fixing member 14, the fixing member 14 being an integrally formed structure and extending along the first direction X, the fixing member 14 being located on one side of the battery cell assembly 12 along a second direction Y; the fixing member 14 includes a body portion 141, a first sidewall 143, a second sidewall 144, and a blocking portion 142; the first sidewall 143 and the second sidewall 144... The first direction X, the second direction Y, and the third direction Z are arranged opposite each other and protrude from the body part 141 in a direction away from the battery cell 20. The shielding part 142 is connected to the first side wall 143 and bends relative to the first side wall 143 and extends towards the second side wall 144. There is a gap 145 between the shielding part 142 and the second side wall 144. The body part 141, the first side wall 143, the second side wall 144 and the shielding part 142 together form a wire harness receiving space 146. The sampling wire harness 13 is used to enter the wire harness receiving space 146 from the gap 145.

[0133] The fixing member 14 includes an elastic connecting portion 147 connected to the shielding portion 142 and the first sidewall 143. The elastic connecting portion 147 is used for the shielding portion 142 to elastically swing relative to the first sidewall 143 to increase the gap 145 so that the sampling wire harness 13 can enter the wire harness receiving space 146, or to decrease the gap 145 to restrict the sampling wire harness 13 from leaving the wire harness receiving space 146. The end of the shielding portion 142 near the second sidewall 144 is connected to a first structure 1421, which is bent relative to the shielding portion 142 in a direction away from the second sidewall 144; and / or, the end of the shielding portion 142 near the second sidewall 144 is connected to a second structure 1422, which is bent relative to the shielding portion 142 in a direction away from the second sidewall 144 to shield at least a portion of the gap 145.

[0134] The battery cell 20 includes a first wall 211 facing the fixing member 14, and the first wall 211 is provided with a pressure relief mechanism 212. A pressure relief area 1411 is provided in the region of the body portion 141 located outside the wire harness receiving space 146. The pressure relief area 1411 is used to discharge the emissions from the battery cell 20 when the pressure relief mechanism 212 is actuated. The fixing member 14 includes two wire harness receiving spaces 146 arranged along the third direction Z; along the third direction Z, the pressure relief area 1411 is located between the two wire harness receiving spaces 146.

[0135] The battery cell 20 includes a first wall 211 facing the fixing member 14, and the first wall 211 is provided with electrode terminals 213. The battery device 10 also includes a current-combining member 15, which is electrically connected to the electrode terminals 213. A first fixing area 1412 is provided in the area of ​​the body portion 141 located outside the wire harness receiving space 146, and the first fixing area 1412 is fixedly connected to the current-combining member 15. The fixing member 14 also includes a limiting portion 148, which is connected to the first fixing area 1412 and is disposed opposite to the first fixing area 1412 along the second direction Y. The current-combining member 15 includes a second fixing area 1512, which is located between the first fixing area 1412 and the limiting portion 148. The limiting portion 148 is connected to the end of the second side wall 144 away from the body portion 141 and is bent relative to the second side wall 144 in a direction away from the shielding portion 142.

[0136] The busbar component 15 includes two connecting portions 151 and a transition portion 152. Along a first direction X, the transition portion 152 connects to the two connecting portions 151 and is located between them. The transition portion 152 protrudes relative to the connecting portions 151 in a direction away from the battery cell 20. The connecting portions 151 include a connecting area 1511 and a second fixing area 1512 arranged along a third direction Z. The connecting area 1511 is used for electrical connection with the electrode terminal 213. Along the first direction X, the transition portion 152 connects to the connecting area 1511 of the two connecting portions 151 and is located between them. Along the third direction Z, the second fixing area 1512 protrudes from the transition portion 152 relative to the connecting area 1511.

[0137] The limiting part 148 is provided with a protruding structure 1481 protruding toward the second fixing area 1512, and the second fixing area 1512 is provided with a recessed groove structure or through hole 1513 recessed toward the direction away from the limiting part 148. At least a portion of the protruding structure 1481 is accommodated within the groove structure or through hole 1513. The protruding structure 1481 is processed by hot melting.

[0138] The fastener 14 is manufactured by extrusion molding. The material of the fastener 14 is polyoxymethylene, polypropylene, polycarbonate, polyolefin, or glass fiber.

[0139] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and not to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application, and they should all be covered within the scope of the claims and specification of this application. In particular, as long as there is no structural conflict, the various technical features mentioned in the embodiments can be combined in any way. This application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A battery device, characterized in that, include: A battery cell assembly (12) comprising a plurality of battery cells (20) arranged along a first direction. A sampling harness (13) is used to collect the status information of at least one of the battery cells (20); A fixing member (14) is integrally formed and extends along the first direction. The fixing member (14) is located on one side of the battery cell assembly (12) along the second direction. The fixing member (14) includes a body (141), a first sidewall (143), a second sidewall (144), and a shielding portion (142). The first sidewall (143) and the second sidewall (144) are arranged opposite to each other along a third direction and protrude from the body (141) in a direction away from the battery cell (20). The first direction, the second direction, and the third direction are... The directions are perpendicular to each other; the shielding part (142) is connected to the first sidewall (143) and bends relative to the first sidewall (143) and extends toward the second sidewall (144), and there is a gap (145) between the shielding part (142) and the second sidewall (144); the body part (141), the first sidewall (143), the second sidewall (144) and the shielding part (142) together form a wire harness receiving space (146), and the sampling wire harness (13) is used to enter the wire harness receiving space (146) from the gap (145).

2. The battery device according to claim 1, characterized in that, The fixing member (14) includes an elastic connection (147) connected to the shielding part (142) and the first sidewall (143). The elastic connection (147) is used for the shielding part (142) to elastically swing relative to the first sidewall (143) to increase the gap (145) so that the sampling wire harness (13) enters the wire harness receiving space (146), or to decrease the gap (145) to restrict the sampling wire harness (13) from leaving the wire harness receiving space (146).

3. The battery device according to claim 2, characterized in that, The thickness of the elastic connecting part (147) is less than the thickness of the first sidewall (143) and less than the thickness of the shielding part (142).

4. The battery device according to claim 3, characterized in that, The ratio of the thickness of the elastic connection portion (147) to the thickness of the first sidewall (143) is greater than or equal to 0.25 and less than or equal to 0.75; and / or, The ratio of the thickness of the elastic connecting part (147) to the thickness of the shielding part (142) is greater than or equal to 0.25 and less than or equal to 0.

75.

5. The battery device according to claim 1, characterized in that, The end of the shielding portion (142) near the second sidewall (144) is connected to a first structure (1421), the first structure (1421) being bent relative to the shielding portion (142) in a direction away from the second sidewall (144); and / or, The end of the shielding portion (142) near the second sidewall (144) is connected to a second structure (1422), which is bent toward the second sidewall (144) relative to the shielding portion (142) to shield at least a portion of the gap (145).

6. The battery device according to claim 1, characterized in that, The battery cell (20) includes a first wall (211) facing the fixing member (14), the first wall (211) is provided with a pressure relief mechanism (212), and the area of ​​the body part (141) located outside the wire harness receiving space (146) is provided with a pressure relief area (1411), the pressure relief area (1411) is used to discharge the emissions of the battery cell (20) when the pressure relief mechanism (212) is actuated.

7. The battery device according to claim 6, characterized in that, The fastener (14) includes two wire harness receiving spaces (146) arranged along the third direction; along the third direction, the pressure relief area (1411) is located between the two wire harness receiving spaces (146).

8. The battery device according to claim 6, characterized in that, The main body (141) includes a plurality of pressure relief regions (1411) arranged at intervals along the first direction, and the plurality of pressure relief regions (1411) correspond one-to-one with the pressure relief mechanisms (212) of the plurality of battery cells (20).

9. The battery device according to claim 1, characterized in that, The battery cell (20) includes a first wall (211) facing the fixing member (14), and the first wall (211) is provided with electrode terminals (213). The battery device also includes: A busbar component (15) is electrically connected to the electrode terminal (213); The main body (141) has a first fixing area (1412) located outside the wire harness accommodating space (146), and the first fixing area (1412) is fixedly connected to the busbar component (15).

10. The battery device according to claim 9, characterized in that, The fastener (14) further includes a limiting part (148), which is connected to the first fixing area (1412) and is disposed opposite to the first fixing area (1412) along the second direction; The busbar component (15) includes a second fixing area (1512), which is located between the first fixing area (1412) and the limiting part (148).

11. The battery device according to claim 10, characterized in that, The limiting part (148) is connected to the end of the second sidewall (144) away from the main body part (141) and is bent relative to the second sidewall (144) in a direction away from the blocking part (142).

12. The battery device according to claim 10, characterized in that, The busbar component (15) includes two connecting portions (151) and a transition portion (152); along the first direction, the transition portion (152) is connected to the two connecting portions (151) and located between the two connecting portions (151); the transition portion (152) protrudes relative to the connecting portions (151) in a direction away from the battery cell (20); The connecting portion (151) includes a connecting area (1511) and a second fixing area (1512) arranged along the third direction, the connecting area (1511) being used for electrical connection with the electrode terminal (213).

13. The battery device according to claim 12, characterized in that, Along the first direction, the transition portion (152) is connected to the connection area (1511) of the two connecting portions (151) and is located between the connection areas (1511) of the two connecting portions (151); Along the third direction, the second fixing region (1512) protrudes from the transition portion (152) relative to the connecting region (1511).

14. The battery device according to claim 12, characterized in that, The fastener (14) includes a plurality of limiting portions (148) spaced apart along the first direction, and a portion of the transition portion (152) is accommodated within the interval between two adjacent limiting portions (148) along the first direction.

15. The battery device according to claim 10, characterized in that, The limiting part (148) is provided with a protruding structure (1481) protruding toward the second fixing area (1512), and the second fixing area (1512) is provided with a recessed groove structure or a through hole (1513) recessed toward the direction away from the limiting part (148), and at least a portion of the protruding structure (1481) is accommodated in the groove structure or the through hole (1513).

16. The battery device according to claim 10, characterized in that, The limiting part (148), the second fixing area (1512) and the first fixing area (1412) are fixedly connected by a connector (16), which passes through the limiting part (148), the second fixing area (1512) and the first fixing area (1412) along the second direction.

17. The battery device according to claim 10, characterized in that, The first wall (211) has two electrode terminals (213) arranged along the third direction; along the second direction, the fixing member (14) is located between the two electrode terminals (213).

18. The battery device according to any one of claims 1 to 17, characterized in that, The material of the fastener (14) is polyoxymethylene, polypropylene, polycarbonate, polyolefin or glass fiber.

19. An energy storage device, characterized in that, include: Multiple battery devices according to any one of claims 1 to 18, the battery devices being used to store or provide electrical energy.

20. An energy storage system, characterized in that, include: Power conversion device (2); According to claim 19, the power conversion device (2) is used to electrically connect the power generation device (3) and the energy storage device.

21. A charging network, characterized in that, include: Charging piles (4) ； The energy storage device according to claim 19 or the energy storage system according to claim 20, wherein the energy storage device is used to provide electrical energy to the charging pile (4).

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