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

Abstract

Disclosed in the present application are a battery device, an energy storage device, an energy storage system and a charging network. The battery device comprises a plurality of battery cells, an insulating member and a busbar component. Each battery cell is provided with an electrode terminal on one side in a first direction. The insulating member comprises an insulating main body, a first limiting portion and a second limiting portion, wherein the insulating main body is located on one side of the plurality of battery cells in the first direction, and the first limiting portion and the second limiting portion protrude from the side of the insulating main body that is away from the battery cells in the first direction. The second limiting portion and the busbar component are arranged in a second direction, so as to limit the range of rotation of the busbar component around the first limiting portion, thereby improving the stability of the busbar component, and improving the connection reliability between the busbar component and the electrode terminals. In addition, the second limiting portion and the corresponding insulating main body occupy less space on the side of the busbar component close to the electrode terminals in the first direction, or even require no corresponding space at all, thereby facilitating an increase in the connection area between the electrode terminals and the busbar component, further improving the connection reliability between the two.

Description

Battery devices, energy storage devices, energy storage systems and charging networks Cross-reference to related applications

[0001] This application claims priority to Chinese patent application 202423276271.8 entitled “Battery Device and Energy Storage Device”, filed on December 30, 2024, the entire contents of which are incorporated herein by reference. Technical Field

[0002] This application relates to the field of batteries, and in particular to a battery device, an energy storage device, an energy storage system, and a charging network. Background Technology

[0003] In recent years, power batteries have made great strides and can be widely used in energy storage power systems such as hydropower, thermal power, wind power and solar power plants, as well as in electric vehicles, power tools, military equipment and aerospace.

[0004] However, the reliability of power batteries still needs to be improved. (Utility Model Content)

[0005] This application provides a battery device, an energy storage device, an energy storage system, and a charging network that can improve the reliability of the battery device.

[0006] In a first aspect, embodiments of this application provide a battery device, including a battery housing, a plurality of battery cells, an insulating member, and a busbar. The battery housing forms a receiving cavity, and the plurality of battery cells are disposed in the receiving cavity. Each battery cell has an electrode terminal on one side along a first direction. The insulating member is disposed in the receiving cavity and includes an insulating body, a first limiting portion, and a second limiting portion. The insulating body is located on one side of the plurality of battery cells along the first direction, and the first and second limiting portions protrude from the insulating body on the side away from the battery cells along the first direction. The first limiting portion includes a first part and a second part, and the second part is disposed on the side of the first part away from the insulating body along the first direction. The busbar is connected to the electrode terminals, and at least a portion of the busbar is located on the side of the insulating body away from the battery cells along the first direction. The busbar has a through hole, and the first part of the first limiting portion is accommodated in the through hole. In the first direction, a portion of the busbar is located between the second part of the first limiting portion and the insulating body. The second limiting portion and the busbar are arranged along a second direction, and the first and second directions intersect each other.

[0007] In the above solution, the first limiting part protrudes from the side of the insulating body away from the battery cell along the first direction, and includes a first part and a second part disposed on the side of the first part away from the insulating body along the first direction. At least a portion of the busbar is located on the side of the insulating body away from the battery cell along the first direction. The first part of the first limiting part is accommodated in the through hole of the busbar. In the first direction, a portion of the busbar is located between the second part of the first limiting part and the insulating body. Therefore, the busbar can be pressed against the insulating body along the first direction by the first limiting part, and the busbar can be limited along the first direction and in other directions perpendicular to the first direction. Based on this, by setting a second limiting part protruding from the side of the insulating body away from the battery cell along the first direction, and arranging the second limiting part and the current-carrying component along the second direction, the range of rotation of the current-carrying component around the first limiting part can be limited. On the one hand, this can improve the stability of the current-carrying component and enhance the connection reliability between the current-carrying component and the electrode terminal. On the other hand, the second limiting part and the part of the insulating body used to support the second limiting part occupy less space on the side of the current-carrying component near the electrode terminal along the first direction, or even no corresponding space is required. Therefore, it helps to increase the connection area between the electrode terminal and the current-carrying component, further improve the connection reliability between the current-carrying component and the electrode terminal, and thus improve the reliability of the battery device.

[0008] In some embodiments, the second limiting portion includes a limiting plate and a buckle. The limiting plate is connected to the insulating body and arranged with the busbar component along a second direction. The buckle is disposed on the limiting plate and spaced apart from the insulating body along a first direction. The battery device also includes a wiring harness disposed on the insulating body, with at least a portion of the wiring harness located between the insulating body and the buckle along the first direction.

[0009] In the above solution, the limiting plate and the busbar component are arranged along the second direction, thereby limiting the busbar component and reducing the risk of the busbar component rotating around the portion of the first limiting part accommodated in the through hole. Furthermore, by providing a buckle on the limiting plate, which is spaced apart from the insulating body along the first direction, at least a portion of the wire harness disposed on the insulating body can be limited in the first direction, improving the stability and reliability of the wire harness.

[0010] In some embodiments, the insulating body includes a main body portion and a support plate arranged along a second direction, a busbar component located on one side of the support plate along a first direction, and a second limiting portion located between the main body portion and the support plate.

[0011] In the above scheme, the main body and support plate of the insulating body are arranged along the second direction, and the second limiting part is set between the main body and the support plate. Under the premise of limiting the current-carrying component by the second limiting part, the structure of the insulating body and the second limiting part is more compact, and the risk of positional interference between the second limiting part and other structures in the battery device is reduced.

[0012] In some embodiments, a plurality of battery cells are arranged along a third direction, and there are multiple support plates and multiple busbars. The multiple support plates and multiple busbars are spaced apart along the third direction. In the third direction, the two ends of the busbars extend beyond the support plates and are respectively connected to the electrode terminals of two battery cells. The third direction intersects the first direction and the second direction respectively.

[0013] In the above scheme, multiple support plates are spaced apart along a third direction. These support plates can support multiple busbar components, improving the stability of each component. Simultaneously, the space between adjacent support plates can be used to accommodate other structures of the battery device, making the battery device more compact. Furthermore, the two ends of each busbar component extend beyond the support plates along a third direction. These two portions extending beyond the support plates can be connected to the electrode terminals of two individual battery cells, thereby enabling the two battery cells to be connected in series or in parallel.

[0014] In some embodiments, in the third-party direction, at least a portion of the support plate is located between the electrode terminals of two adjacent battery cells.

[0015] In the above solution, at least part of the support plate is disposed in the space between the electrode terminals of two adjacent battery cells along a third direction, which can make reasonable use of the space and make the structure of the insulating component and the battery cell more compact. Furthermore, the two protruding parts of the busbar relative to the support plate can respectively fit against the corresponding electrode terminals along the first direction, which helps to achieve the connection between the busbar and the corresponding electrode terminals.

[0016] In some embodiments, the second limiting portion is provided with a wire passage connecting both sides of the second limiting portion along the second direction, and the wire passage is used for the wire harness to pass through.

[0017] In the above solution, based on setting the second limiting part between the main body and the support plate, the second limiting part is further provided to form a wire passage, so that the wire passage connects the two sides of the second limiting part along the second direction. During the assembly of the battery device, the wire harness can extend directly from the main body through the wire passage to one side of the support plate along the first direction and connect with the busbar on the support plate without having to go around the second limiting part. On the one hand, this can reduce the assembly difficulty of the wire harness and improve the assembly efficiency, and on the other hand, it can shorten the length of the wire harness and save costs.

[0018] In some embodiments, in a first direction, the projection of the through hole onto the insulating body is located between the projections of the electrode terminals of two adjacent battery cells onto the insulating body.

[0019] In the above scheme, the projection of the through hole along the first direction on the insulating body is located between the projections of the electrode terminals of two adjacent battery cells along the first direction on the insulating body. That is, the through hole and the interval area between the two adjacent electrode terminals are correspondingly set. The through hole and the electrode terminals are staggered. Compared with the arrangement where the projection of the through hole along the first direction on the insulating body overlaps with the projection of the electrode terminal along the first direction on the insulating body, on the one hand, it can reduce the possibility of the through hole occupying the space in the busbar component used for connecting with the electrode terminals, increase the connection area between the busbar component and the electrode terminals, reduce the connection resistance between the busbar component and the electrode terminals, and help improve the current transmission capability between the electrode terminals and the busbar component and reduce the energy loss between them. On the other hand, it can reduce the risk of interference between the first limiting part that cooperates with the through hole and the electrode terminal.

[0020] In some embodiments, a plurality of battery cells are arranged along a third direction, and the distance from the through hole to the electrode terminals of two adjacent battery cells along the third direction is the same.

[0021] In the above scheme, the distance from the through hole to the electrode terminals of two adjacent battery cells along the third direction is the same. In this case, the through hole is approximately located at the center between the electrode terminals of the two adjacent battery cells, which is also approximately located at the center of the busbar component along the third direction. This helps to improve the uniformity of stress distribution on the busbar component. Furthermore, when the through hole is approximately located at the center between the electrode terminals of two adjacent battery cells, the first limiting part that mates with the through hole is also approximately located at the center between the electrode terminals of the two adjacent battery cells. That is, the connection point between the insulating member and the busbar component is approximately located at the center between the electrode terminals of the two adjacent battery cells, which can improve the support stability of the insulating member for the busbar component.

[0022] In some embodiments, the busbar component is provided with a plurality of through holes. In a first direction, the projections of the plurality of through holes onto the insulating body are all located between the projections of the electrode terminals of two adjacent battery cells onto the insulating body, and the plurality of through holes are spaced apart along a second direction.

[0023] In the above solution, by providing multiple through holes in the area between the electrode terminals of two adjacent battery cells in the busbar component, and distributing the multiple through holes at intervals along the second direction, the busbar component can be further locked by cooperating with the first limiting part through the multiple through holes without occupying the space in the busbar component used for connecting with the electrode terminals, thereby further improving the stability of the busbar component.

[0024] In some embodiments, at least one of the first limiting portion and the second limiting portion is integrally formed with the insulating body.

[0025] In the above solution, by setting at least one of the first limiting part and the second limiting part to be integrally formed with the insulating body, the connection reliability between at least one of the first limiting part and the second limiting part and the insulating body can be improved, the stability of the busbar component can be enhanced, and the assembly time between at least one of the first limiting part and the second limiting part and the insulating body can be saved, thereby improving the assembly efficiency of the battery device.

[0026] In some embodiments, the busbar component includes a first busbar, a second busbar, and a buffer portion. The first busbar and the second busbar are electrically connected to the electrode terminals of two battery cells, respectively. The buffer portion is disposed between the first busbar and the second busbar, and a through hole is disposed in the first busbar.

[0027] In the above scheme, the first and second busbars are electrically connected to the electrode terminals of two battery cells, respectively, to achieve series or parallel connection of the two battery cells. A buffer section is disposed between the first and second busbars. This buffer absorbs the expansion force and deforms when the battery cells expand, thus buffering the relative positional changes between the electrode terminals of the two battery cells. This reduces the risk of connection failure due to separation of the busbar from the electrode terminals during battery cell expansion, and improves the connection reliability between the busbar and the electrode terminals. Furthermore, placing the through-hole on the first busbar, compared to placing it on the buffer section, reduces the impact of the buffer section's deformation on the connection between the first limiting section and the through-hole, improving the connection reliability between the first limiting section and the busbar.

[0028] In some embodiments, the insulating elements are arranged symmetrically along the centerline of the insulating element in its own width direction.

[0029] In the above scheme, the insulating components are arranged symmetrically along their center lines in the width direction, which helps to improve the versatility of the insulating components and reduce the mold opening cost of the insulating components.

[0030] In some embodiments, the insulating body and the busbar component are riveted together by a first limiting portion.

[0031] In the above scheme, the insulating body and the busbar component are riveted together through the first limiting part, which can improve the reliability of the connection and reduce the connection difficulty.

[0032] A second aspect of this application provides an energy storage device, including any of the battery devices described above.

[0033] A third aspect of this application provides an energy storage system including the above-described energy storage device.

[0034] A fourth aspect of this application provides a charging network including the above-described energy storage device. Attached Figure Description

[0035] The features, advantages, and technical effects of exemplary embodiments of this application will now be described with reference to the accompanying drawings.

[0036] Figure 1 is a schematic diagram of the structure of a vehicle provided in some embodiments of this application;

[0037] Figure 2 is an exploded view of a battery device provided in some embodiments of this application;

[0038] Figure 3 is a schematic diagram of the connection between a battery cell and a busbar in a battery device provided in some embodiments of this application;

[0039] Figure 4 is a schematic diagram of the structure of the insulating component and the busbar component in the battery device provided in some embodiments of this application;

[0040] Figure 5 is a magnified view of part AA in Figure 4;

[0041] Figure 6 is a side view of the insulator and the busbar in a battery device provided in some embodiments of this application;

[0042] Figure 7 is a magnified view of part BB in Figure 6;

[0043] Figure 8 is a top view of the insulating component and the busbar component in a battery device provided in some embodiments of this application;

[0044] Figure 9 is a partial enlarged view of the insulating component and the busbar component in a battery device provided in some embodiments of this application;

[0045] Figure 10 is a schematic diagram of the structure of a busbar component in a battery device provided in some embodiments of this application;

[0046] Figure 11 is a schematic diagram of the energy storage system in some embodiments of this application;

[0047] Figure 12 is a schematic diagram of the structure of an energy storage device in some embodiments of this application;

[0048] Figure 13 is a schematic diagram of the structure of the charging network in some embodiments of this application.

[0049] Tag name:

[0050] Vehicles 1000; Energy storage system 2000; Power generation unit 3000; Charging network 4000; Battery unit 100; Controller 200; Motor 300; Energy storage device 400; Energy storage box 410; Energy storage converter 500; Charging pile 600;

[0051] Battery cell 110; electrode terminal 111; first housing 120; second housing 130;

[0052] Insulating component 140; Insulating body 141; Body part 1411; Support plate 1412; First limiting part 142; Second limiting part 143; Limiting plate 1431; Buckle 1432; Wire passage 1433; Wire hole 1434; Notch 1435;

[0053] Busbar component 150; through hole 151; first busbar section 152; second busbar section 153; buffer section 154; wire harness 160; first direction X; second direction Y; third direction Z. Detailed Implementation

[0054] The embodiments of this application will be described in further detail below with reference to the accompanying drawings and examples. The detailed description of the following embodiments and the accompanying drawings are used to illustrate the principles of this application by way of example, but should not be used to limit the scope of this application, that is, this application is not limited to the described embodiments.

[0055] In the description of this application, it should be noted that, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," and "outer," etc., indicating orientation or positional relationships, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this application. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance. "Vertical" is not vertical in the strict sense, but within the allowable tolerance range. "Parallel" is not parallel in the strict sense, but within the allowable tolerance range.

[0056] 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.

[0057] In the description of this application, it should also be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this application depending on the specific circumstances.

[0058] The battery device mentioned in the embodiments of this application may include one or more battery cell assemblies for providing voltage and capacity. A battery cell assembly may include multiple battery cells, which are connected in series, parallel, or mixed connections via a busbar.

[0059] In some embodiments, a battery cell generally includes an electrode assembly. The electrode assembly includes a positive electrode, a negative electrode, and a separator, with the separator disposed between the negative and positive electrodes. During the charging and discharging process of the battery cell, active ions (e.g., lithium ions) repeatedly insert and extract between the positive and negative electrodes. The separator, disposed between the positive and negative electrodes, serves to prevent short circuits between the positive and negative electrodes while allowing active ions to pass through.

[0060] In some embodiments, the battery cell may include a casing. The casing may 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 may be a sealed structure or a non-sealed structure.

[0061] As an example, when the outer casing is a non-sealed structure, it serves to protect the electrode assembly. A sealing bag is also included between the outer casing and the electrode assembly 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 outer casing is a sealed structure, it is used to encapsulate components such as the electrode assembly and electrolyte.

[0062] As an example, the battery cell can be a cylindrical battery cell, a prismatic battery cell, a pouch battery cell, or a battery cell of other shapes. Prismatic battery cells include prismatic battery cells, blade-shaped battery cells, and multi-prismatic batteries, such as hexagonal prismatic batteries. This application does not have any particular limitations.

[0063] Battery cells typically have electrode terminals on their casings for current input or output. Battery devices usually include busbars for connecting to these electrode terminals, enabling series, parallel, or mixed connections of multiple battery cells. Furthermore, to improve the stability and reliability of the busbars, battery devices typically include insulating components, at least partially positioned between the battery cells and the busbars, for support and fixation of the busbars.

[0064] Busbar components and insulators are typically connected by hot riveting. For example, hot riveting posts can be installed on the insulating body of the insulator, with a portion of the post passing through the busbar component. Pressure is then applied to the post using a hot riveting machine or gun, causing plastic deformation and thus connecting the busbar component to the insulator. This connection method usually requires multiple hot riveting posts arranged circumferentially around the electrode terminals, each connected to the busbar component. Otherwise, the busbar component might rotate around the posts during subsequent use, affecting its stability and consequently the reliability of the connection between the busbar component and the electrode terminals. However, a large number of hot riveting posts and the portion of the insulating body supporting them typically occupy a significant amount of space on the side of the busbar component closest to the electrode terminals, limiting the connection area and further impacting the reliability of the connection.

[0065] In view of this, this application provides a battery device including a battery housing, a plurality of battery cells, an insulating member, and a busbar. The battery housing has a receiving cavity, in which the plurality of battery cells are disposed. Each battery cell has an electrode terminal on one side along a first direction. The insulating member is disposed in the receiving cavity and includes an insulating body, a first limiting portion, and a second limiting portion. The insulating body is located on one side of the plurality of battery cells along the first direction, and the first and second limiting portions protrude from the insulating body on the side away from the battery cells along the first direction. The first limiting portion includes a first part and a second part, with the second part disposed on the side of the first part away from the insulating body along the first direction. The busbar is connected to the electrode terminals, with at least a portion of the busbar located on the side of the insulating body away from the battery cells along the first direction. The busbar has a through hole, and the first portion of the first limiting portion is received in the through hole. In the first direction, a portion of the busbar is located between the second portion of the first limiting portion and the insulating body. The second limiting portion and the busbar are arranged along a second direction, and the first and second directions intersect each other. This application uses a first limiting part to press the current-collecting component against the insulating body along a first direction, enabling the current-collecting component to be limited along the first direction and in other directions perpendicular to the first direction. Based on this, a second limiting part is provided and arranged with the current-collecting component along a second direction to limit the range of rotation of the current-collecting component around the first limiting part. This improves the stability of the current-collecting component and enhances the reliability of the connection between the current-collecting component and the electrode terminals. Furthermore, the second limiting part and the portion of the insulating body supporting the second limiting part occupy less space on the side of the current-collecting component near the electrode terminals along the first direction, or even no corresponding space is required. This helps to increase the connection area between the electrode terminals and the current-collecting component, further improving the reliability of the connection between the current-collecting component and the electrode terminals, and thus enhancing the reliability of the battery device.

[0066] The technical solutions described in the embodiments of this application are applicable to various energy storage devices that use battery devices. The energy storage device includes one or more battery clusters to increase the voltage and capacity of the energy storage device. A 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.

[0067] In some embodiments, the energy storage device may include a cabinet and one or more battery clusters housed within the cabinet.

[0068] 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.

[0069] 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.

[0070] 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 auxiliary battery management units, integrated switches, and other modules.

[0071] As an example, the central control module can serve as the battery management unit for an energy storage device, used to monitor and manage the device. The central control module can monitor information such as the energy storage device's current, voltage, power, state of charge, or temperature. For instance, it can control the charging and discharging current and voltage of the energy storage device. As an example, the central control module includes modules such as an insulation monitoring module, a main battery management unit, and a fiber optic conversion module.

[0072] As an example, a fire protection system includes control panels, detectors, alarm devices, etc., used to detect, alarm, or extinguish fires in energy storage systems.

[0073] As an example, the power distribution unit can be used to distribute power to the power modules of the energy storage device.

[0074] The technical solutions described in the embodiments of this application are also applicable to various power-consuming devices that use battery devices, such as mobile phones, portable devices, laptops, electric vehicles, electric toys, power tools, vehicles, ships, and spacecraft, etc. For example, spacecraft include airplanes, rockets, space shuttles, and spacecraft.

[0075] The battery devices described in this application are not limited to the electrical devices described above, but for the sake of brevity, the following embodiments are all illustrated using electric vehicles as an example.

[0076] Please refer to Figure 1, which is a simplified schematic diagram of a vehicle 1000 provided in an embodiment of this application. The vehicle 1000 can be a gasoline-powered vehicle, a natural gas-powered vehicle, or a new energy vehicle. New energy vehicles can be pure electric vehicles, hybrid electric vehicles, or range-extended electric vehicles, etc. A battery device 100 can be installed inside the vehicle 1000; specifically, for example, the battery device 100 can be installed at the bottom, front, or rear of the vehicle 1000. The battery device 100 can be used to power the vehicle 1000; for example, the battery device 100 can serve as the operating power source for the vehicle 1000. The vehicle 100 may also include a controller 200 and a motor 300. The controller 200, for example, is used to control the battery to supply power to the motor 300. The battery device 100 can be used for starting the vehicle 1000, navigation, etc. Of course, the battery device 100 can also be used to drive the vehicle 1000, replacing or partially replacing gasoline or natural gas to provide propulsion for the vehicle 1000.

[0077] In some embodiments of this application, the battery device 100 can not only serve as the operating power source for the vehicle 1000, but also as the driving power source for the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000.

[0078] Please refer to Figure 2, which is an exploded view of a battery device 100 provided in some embodiments of this application. The battery device 100 includes a battery housing and battery cells 110. In some embodiments, the battery housing may include a first housing 120 and a second housing 130, which overlap each other, and together define a receiving cavity for accommodating the battery cells 110. The second housing 130 may be a hollow structure with one open end, and the first housing 120 may be a plate-like structure, with the first housing 120 covering the open side of the second housing 130 so that the first housing 120 and the second housing 130 together define the receiving cavity; the first housing 120 and the second housing 130 may also both be hollow structures with one open side, with the open side of the first housing 120 covering the open side of the second housing 130. Of course, the battery housing formed by the first housing 120 and the second housing 130 may be of various shapes, such as a cylinder, a cuboid, etc.

[0079] In this embodiment of the application, the battery cell 110 can be a secondary battery. A secondary battery refers to a battery cell 110 that can be used again after being discharged by recharging to activate the active materials.

[0080] The battery cell 110 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.

[0081] In some embodiments, the battery cell 110 assembly is typically formed by arranging a plurality of battery cells 110.

[0082] As an example, the battery cell 110 assembly can be a battery module, which is formed by arranging and fixing multiple battery cells 110 together to form an independent module. As an example, the battery module can be formed by bundling multiple battery cells 110 together with cable ties.

[0083] In some embodiments, the battery device 100 may be a battery pack, which includes a battery housing and one or more battery cell 110 assemblies, the battery cell 110 assemblies being housed in the battery housing.

[0084] As an example, the battery cell 110 assembly can be a battery module, and the battery cell 110 assembly can be housed in the battery housing by fixing the battery module in the battery housing.

[0085] As an example, the battery cell 110 assembly can also be housed in the battery housing by directly fixing multiple battery cells 110 to the battery housing.

[0086] As an example, the battery housing may include a first housing 120 and a second housing 130. The first housing 120 and the second housing 130 are fastened together to form a closed space inside the battery housing to house the battery cells 110 assembly. Here, "closed" refers to covering or closing, and can be either sealed or unsealed. The first housing 120 may be a top cover or a bottom plate.

[0087] As an example, the battery housing may include a top cover, a frame, and a bottom plate. The top cover and bottom plate are respectively connected to the frame, so that the interior of the battery housing forms an enclosed space to accommodate the battery cells 110 assembly.

[0088] In some embodiments, the battery housing may be part of the chassis structure of the vehicle 1000. For example, a portion of the battery housing may be at least a part of the floor of the vehicle 1000, or a portion of the battery housing may be at least a part of the crossbeams and longitudinal beams of the vehicle 1000.

[0089] Figure 3 is a schematic diagram of the structure of a battery cell 110 provided in some embodiments of this application. In the battery device 100, there can be multiple battery cells 110, which can be connected in series, parallel, or in a mixed configuration. A mixed configuration means that multiple battery cells 110 are connected in both series and parallel connections. Multiple battery cells 110 can be directly connected in series, parallel, or in a mixed configuration, and then the entire assembly of the multiple battery cells 110 is housed within a casing. Alternatively, the battery device 100 can also consist of multiple battery cells 110 first connected in series, parallel, or in a mixed configuration to form a battery module, and then multiple battery modules are connected in series, parallel, or in a mixed configuration to form a whole, which is then housed within a casing.

[0090] Each battery cell 110 can be a secondary battery cell 110 or a primary battery cell 110; it can also be a lithium-sulfur battery cell 110, a sodium-ion battery cell 110, or a magnesium-ion battery cell 110, but is not limited to these. The battery cell 110 can be cylindrical, flat, cuboid, or other shapes.

[0091] In some embodiments, the housing includes a casing and an end cap. The casing has an opening, and the end cap is connected to the casing and closes the opening. The casing is a component used to mate with the end cap to form an internal cavity of the battery cell 110, which can be used to accommodate electrode assemblies, electrolytes, and other components. The casing may have one or more openings. One or more end caps may also be provided. The casing and end caps may be separate components.

[0092] For example, an opening can be provided on the housing, and an end cap can be used to close the opening to form an internal cavity for the battery cell 110. The housing can be of various shapes and sizes, such as a cuboid. Specifically, the shape of the housing can be determined according to the specific shape and size of the electrode assembly. The housing can be made of various materials, such as copper, iron, aluminum, stainless steel, aluminum alloy, etc. The shape of the end cap can be adapted to the shape of the housing to fit the housing. The material of the end cap can be the same as or different from the material of the housing.

[0093] Optionally, the end cap can be made of a material with a certain degree of hardness and strength (such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc.). This makes the end cap less prone to deformation under pressure and impact, allowing the battery cell 110 to have higher structural strength and improved reliability. The end cap is connected to the housing by welding, bonding, snap-fitting, or other methods. The housing can be open at one end or at both ends.

[0094] In some examples, the housing may be an opening on one side, with one end cap fitting over the housing. In other examples, the housing may be an opening on both sides, with two end caps fitting over the two openings of the housing, respectively. Electrode assemblies are components within the battery cell 110 where electrochemical reactions occur. The housing may contain one or more electrode assemblies.

[0095] In some embodiments, at least one electrode terminal 111 is provided on the housing, and the electrode terminal 111 is electrically connected to the tab. The electrode terminal 111 can be directly connected to the tab, or it can be indirectly connected to the tab through a current collector. The electrode terminal 111 can be provided on the end cap or on the housing.

[0096] The structure of the battery device 100 will now be described in detail with reference to the accompanying drawings.

[0097] Please refer to Figures 3 to 6. In a first aspect, embodiments of this application provide a battery device 100, including a battery housing, a plurality of battery cells 110, an insulating member 140, and a busbar component 150. The battery housing forms a receiving cavity, in which the plurality of battery cells 110 are disposed. Each battery cell 110 has an electrode terminal 111 on one side along a first direction X. The insulating member 140 is disposed in the receiving cavity and includes an insulating body 141, a first limiting portion 142, and a second limiting portion 143. The insulating body 141 is located on one side of the plurality of battery cells 110 along the first direction X. The first limiting portion 142 and the second limiting portion 143 protrude from the insulating body 141 on the side away from the battery cells 110 along the first direction X. 2 includes a first part and a second part, the second part being disposed on the side of the first part away from the insulating body 141 along the first direction X; a busbar 150 is connected to the electrode terminal 111, at least a portion of the busbar 150 is located on the side of the insulating body 141 away from the battery cell 110 along the first direction X, the busbar 150 is provided with a through hole 151, a first portion of the first limiting portion 142 is accommodated in the through hole 151, in the first direction X, a portion of the busbar 150 is located between the second portion of the first limiting portion 142 and the insulating body 141, the second limiting portion 143 is arranged with the busbar 150 along the second direction Y to limit the range of rotation of the busbar 150 around the first limiting portion 142, the first direction X and the second direction Y intersect each other.

[0098] In the battery device 100, the number of battery cells 110 can be two or more. Each battery cell 110 has an electrode terminal 111 on one side along the first direction X for current input or output. The battery cells 110 can be arranged in various ways within the battery housing. For example, multiple battery cells 110 can be arranged along the second direction Y or along the third direction Z. The first direction X can be the length direction of the battery cell 110 or the thickness direction of the busbar component 150. The second direction Y and the third direction Z can be any two intersecting directions in a plane that intersects or is perpendicular to the first direction X. For example, when the first direction X is the length direction of the battery cell 110, the second direction Y can be either the width direction or the height direction of the battery cell 110, and the third direction Z can be the other one.

[0099] Insulator 140 is a component used to provide insulating support for busbar 150, and the material of insulator 140 includes insulating material. Within insulator 140, insulating body 141 is the main component that provides insulating support. Insulator body 141 is located on one side of the plurality of battery cells 110 along the first direction X, and can contact the plurality of battery cells 110 to support busbar 150 between the battery cells 110 and busbar 150. Furthermore, insulating body 141 can also be used to support other structures in the battery device 100, such as the sampling harness of busbar 150.

[0100] The insulating member 140 also includes a first limiting portion 142 disposed on the insulating body 141. The first limiting portion 142 is a component for connecting the busbar 150 to the insulating body 141 along the first direction X. The first limiting portion 142 protrudes from the side of the insulating body 141 away from the battery cell 110 along the first direction X. The first limiting portion 142 includes a first part and a second part. The first part can be accommodated in the through hole 151 of the busbar 150. In the first direction X, one end of the first part can be connected to the insulating body 141, and the other end is connected to the second part. That is, the second part is connected to the insulating body 141 through the first part. The second part can protrude relative to the first part in a plane perpendicular to the first direction X. Part of the second part can be spaced apart from the insulating body 141 in the first direction X. Therefore, in the first direction X, a portion of the busbar 150 can be located between the insulating body 141 and the second part, while another portion can be located outside the second part. In this case, the portion of the busbar 150 located between the insulating body 141 and the second part is equivalent to being pressed against the insulating body 141 by the second part along the first direction X. The structure of the first limiting part 142 can be varied. For example, the first limiting part 142 can be a hot-riveted post, or it can be a fastening structure with bolts and nuts. There are various ways to connect the first limiting part 142 to the insulating body 141. For example, the first limiting part 142 and the insulating body 141 can be an integrally formed structure, or the first limiting part 142 can be connected to the insulating body 141 by means of adhesion.

[0101] The insulating member 140 also includes a second limiting portion 143 disposed on the insulating body 141. The second limiting portion 143 is a component used to restrict the rotation of the busbar 150 around the portion of the first limiting portion 142 accommodated in the through hole 151, thereby reducing the rotation amplitude of the busbar 150. The second limiting portion 143 protrudes from the side of the insulating body 141 away from the battery cell 110 along the first direction X. It can be spaced apart from the first limiting portion 142 and located on the side of the busbar 150 along the second direction Y. At this time, in the second direction Y, the projections of the second limiting portion 143 and the busbar 150 on the battery case can overlap each other. During the use of the battery device 100, the surface of the second limiting portion 143 near the busbar 150 along the second direction Y can abut against the busbar 150 to restrict the rotation of the busbar 150 around the portion of the first limiting portion 142 accommodated in the through hole 151.

[0102] When the second limiting part 143 is located on one side of the busbar component 150 along the second direction Y, the second limiting part 143 can be in contact with the busbar component 150 or can be spaced apart from the busbar component 150. The second direction Y can be any direction in a plane that intersects with or is perpendicular to the first direction X, that is, the second limiting part 143 can be located on any side of the busbar component 150 in the aforementioned plane. The shape of the second limiting part 143 can be various. For example, the second limiting part 143 can be a plate-like structure, or the second limiting part 143 can be rod-like or other regular or irregular shapes. There are various ways to connect the second limiting part 143 to the insulating body 141. For example, the second limiting part 143 and the insulating body 141 can be an integrally formed structure, or the second limiting part 143 can be connected to the insulating body 141 by means of adhesion or other methods.

[0103] The busbar component 150 is a component used to realize the series, parallel, or mixed connection of two battery cells 110. At least a portion of the busbar component 150 is located on the side of the insulating body 141 away from the battery cell 110 along the first direction X. This can mean that the entire busbar component 150 is located on the side of the insulating body 141 away from the battery cell 110 along the first direction X, or it can mean that a portion of the busbar component 150 is located on the side of the insulating body 141 along the first direction X, while another portion can extend beyond the insulating body 141 in a plane perpendicular to the first direction X. In this case, in the first direction X, the projection of the portion of the busbar component 150 located on the side of the insulating body 141 along the first direction X onto the battery case is within the projection of the insulating body 141 onto the battery case, and this portion of the busbar component 150 is blocked by the insulating body 141. The projection of the portion of the busbar component 150 extending beyond the insulating body 141 onto the battery case is outside the projection of the insulating body 141 onto the battery case, and it can be used to connect to the electrode terminals 111 of the battery cell 110. The busbar component 150 has a through hole 151 along the first direction X. The number of through holes 151 can be one or more. The through hole 151 is used to accommodate a portion of the first limiting portion 142, so that the first limiting portion 142 can pass through the busbar component 150 along the first direction X. A portion of the busbar component 150 is located between the portion of the first limiting portion 142 and the insulating body 141 along the first direction X. This portion of the busbar component 150 is equivalent to being pressed against the insulating body 141 by the first limiting portion 142 along the first direction X.

[0104] In the above scheme, the first limiting part 142 protrudes from the side of the insulating body 141 away from the battery cell 110 along the first direction X. At least a portion of the busbar 150 is located on the side of the insulating body 141 away from the battery cell 110 along the first direction X. The first part of the first limiting part 142 is accommodated in the through hole 151 of the busbar 150. In the first direction X, a portion of the busbar 150 is located between the second part of the first limiting part 142 and the insulating body 141. Therefore, the busbar 150 can be pressed against the insulating body 141 along the first direction X by the first limiting part 142, and the busbar 150 can be limited along the first direction X and other directions perpendicular to the first direction X. Based on this, by setting a second limiting part 143 protruding from the insulating body 141 on the side away from the battery cell 110 along the first direction X, and the second limiting part 143 and the current-combining component 150 are arranged along the second direction Y, the range of rotation of the current-combining component 150 around the first limiting part 142 is limited. On the one hand, this can improve the stability of the current-combining component 150 and enhance the connection reliability between the current-combining component 150 and the electrode terminal 111. On the other hand, the second limiting part 143 and the part of the insulating body 141 used to support the second limiting part 143 occupy less space on the side of the current-combining component 150 near the electrode terminal 111 along the first direction X, or even do not need to occupy corresponding space. Therefore, it helps to increase the connection area between the electrode terminal 111 and the current-combining component 150, further improving the connection reliability between the current-combining component 150 and the electrode terminal 111, thereby improving the reliability of the battery device 100.

[0105] In this embodiment, the second limiting part 143 limits the busbar component 150 to reduce the space occupied by the busbar component 150 along the first direction X near the electrode terminal 111, or even eliminates the need to occupy the space of the busbar component 150 along the first direction X near the electrode terminal 111. This allows the busbar component 150 to have sufficient space along the first direction X near the electrode terminal 111 for setting the electrode terminal 111, which helps to increase the size of the electrode terminal 111 in the plane perpendicular to the first direction X, thereby increasing the connection area between the electrode terminal 111 and the busbar component 150. At this time, not only is the connection reliability between the busbar component 150 and the electrode terminal 111 improved, but the current transmission capability between the busbar component 150 and the electrode terminal 111 is also improved.

[0106] Please refer to Figures 5 to 7. In some embodiments, the second limiting part 143 includes a limiting plate 1431 and a buckle 1432. The limiting plate 1431 is connected to the insulating body 141 and is arranged with the busbar 150 along the second direction Y. The buckle 1432 is disposed on the limiting plate 1431 and is spaced apart from the insulating body 141 along the first direction X. The battery device 100 also includes a wiring harness 160, which is disposed on the insulating body 141. At least a portion of the wiring harness 160 is located between the insulating body 141 and the buckle 1432 along the first direction X.

[0107] The limiting plate 1431 is a component in the second limiting portion 143 used to restrict the rotation of the busbar component 150 around the portion of the first limiting portion 142 accommodated within the through hole 151. The limiting plate 1431 is connected to the insulating body 141, protruding from the side of the insulating body 141 away from the battery cell 110 along the first direction X, and arranged with the busbar component 150 along the second direction Y. Therefore, the surface of the limiting plate 1431 near the busbar component 150 along the second direction Y can be used to abut against the busbar component 150, thereby restricting the rotation of the busbar component 150 around the aforementioned portion of the first limiting portion 142 to a certain extent. There are various ways to connect the limiting plate 1431 to the insulating body 141; for example, the limiting plate 1431 can be integrally formed with the insulating body 141, or the limiting plate 1431 can be connected to the insulating body 141 by other means such as adhesive bonding.

[0108] The latch 1432 is a component in the second limiting part 143 used to limit the wire harness 160. The latch 1432 is disposed on the limiting plate 1431, and is spaced apart from the insulating body 141 along the first direction X, with a certain gap area between them, which can be used to set the wire harness 160.

[0109] The wire harness 160 is a component used to realize the electrical connection, voltage and temperature control functions of the busbar 150. The wire harness 160 can be disposed on the insulating body 141 and extend from the insulating body 141 to be electrically connected to the busbar 150. There can be multiple wire harnesses 160, and multiple wire harnesses 160 can be bundled into a whole by cable ties. At least a portion of the wire harness 160 is located in the aforementioned interval area, that is, at least a portion of the wire harness 160 can be located between the clip 1432 and the insulating body 141 along the first direction X. Therefore, the clip 1432 can limit the at least portion of the wire harness 160 along the first direction X. At least a portion of the wire harness 160 is located between the insulating body 141 and the clip 1432 along the first direction X. This can mean that all the wire harnesses 160 on the insulating body 141 are located between the clip 1432 and the insulating body 141 along the first direction X, or it can mean that a portion of the wire harnesses 160 on the insulating body 141 are located between the clip 1432 and the insulating body 141 along the first direction X, while the remaining wire harnesses 160 are located outside the clip 1432 and the insulating body 141.

[0110] In the above scheme, the limiting plate 1431 and the busbar component 150 are arranged along the second direction Y, thereby limiting the busbar component 150 by the limiting plate 1431, reducing the risk of the busbar component 150 rotating around the portion of the first limiting part 142 accommodated in the through hole 151. Furthermore, by providing a buckle 1432 on the limiting plate 1431, the buckle 1432 and the insulating body 141 are spaced apart along the first direction X. Therefore, the buckle 1432 can limit at least a portion of the wire harness 160 disposed on the insulating body 141 in the first direction X, thereby improving the stability and reliability of the wire harness 160.

[0111] Please continue to refer to Figures 6 and 7. In some embodiments, the insulating body 141 includes a main body portion 1411 and a support plate 1412 arranged along the second direction Y, a busbar component 150 located on one side of the support plate 1412 along the first direction X, and a second limiting portion 143 located between the main body portion 1411 and the support plate 1412.

[0112] The main body 1411 is a component in the insulating body 141 used to provide insulating support for structures such as the wiring harness 160 in the battery device 100. The main body 1411 is disposed on one side of the plurality of battery cells 110 along the first direction X, and its projection along the first direction X onto the battery casing can be located between the two electrode terminals 111 of the battery cell 110. Optionally, in the first direction X, the projection of the main body 1411 onto the casing can overlap with the projection of the pressure relief mechanism of the battery cell 110 onto the casing; therefore, a pressure relief port can be provided on the main body 1411 along the first direction X for pressure relief. Optionally, a portion of the main body 1411 can contact the battery cell 110, while another portion can be spaced apart from the battery cell 110 along the first direction X to reduce the impact of the battery cell 110 on the main body 1411.

[0113] The support plate 1412 is a component in the insulating body 141 used to support the busbar component 150. The support plate 1412 is disposed on one side of the body portion 1411. The side of the support plate 1412 close to the battery cell 110 along the first direction X can contact the battery cell 110, and the side away from the battery cell 110 can contact a part of the busbar component 150, so as to support the busbar component 150 between the battery cell 110 and the busbar component 150.

[0114] The support plate 1412 and the main body 1411 are arranged along the second direction Y. The second limiting part 143 is located between the main body 1411 and the support plate 1412. That is, the second limiting part 143 is provided on the side of the support plate 1412 along the second direction Y close to the main body 1411. Compared with providing the second limiting part 143 on the other side of the support plate 1412, the structure of the second limiting part 143, the support plate 1412 and the main body 1411 can be more compact, and the risk of the second limiting part 143 interfering with other structures in the battery device 100 can be reduced.

[0115] Furthermore, when the second limiting part 143 is located between the main body part 1411 and the support plate 1412, it can protrude relative to the support plate 1412 along the first direction X away from the battery cell 110. When the busbar 150 is disposed on the side of the support plate 1412 along the first direction X away from the battery cell 110, the side of the second limiting part 143 close to the busbar 150 along the second direction Y can abut against the busbar 150 to limit the busbar 150 and reduce the risk of the busbar 150 rotating around the aforementioned first limiting part 142.

[0116] Please refer to Figure 8. In some embodiments, multiple battery cells 110 are arranged along a third direction Z. There are multiple support plates 1412 and multiple busbar components 150. The multiple support plates 1412 and multiple busbar components 150 are spaced apart along the third direction Z. In the third direction Z, the two ends of the busbar component 150 extend beyond the support plate 1412 and are respectively connected to the electrode terminals 111 of two battery cells 110. The third direction Z intersects the first direction X and the second direction Y.

[0117] Specifically, multiple support plates 1412 can be configured one-to-one with multiple busbar components 150, that is, one busbar component 150 is disposed on a support plate 1412 on the side away from the battery cell 110 along the first direction X. The number of support plates 1412 can be the same as or different from the number of busbar components 150. Optionally, the number of support plates 1412 can be more than the number of busbar components 150. When multiple busbar components 150 are disposed one-to-one on multiple support plates 1412, other spare support plates 1412 can be disposed between two adjacent busbar components 150. These spare support plates 1412 can be used as backup support plates 1412 to support the busbar components 150 in other application scenarios, thereby improving the installation flexibility of the busbar components 150 and expanding the application range of the insulation component 140.

[0118] When the current-combining component 150 is disposed on the side of the support plate 1412 away from the battery cell 110 along the first direction X, its two ends along the third direction Z extend beyond the support plate 1412 along the third direction Z. The projection of the two portions of the current-combining component 150 extending beyond the support plate 1412 along the first direction X on the battery box is located outside the projection of the support plate 1412 along the first direction X on the battery box. The two portions of the current-combining component 150 can be connected to the electrode terminals 111 of the two battery cells 110 respectively, thereby realizing the series or parallel connection of the two battery cells 110.

[0119] In the above scheme, multiple support plates 1412 are spaced apart along the third direction Z. These support plates 1412 can support multiple busbar components 150, improving the stability of each busbar component 150. Simultaneously, the space between adjacent support plates 1412 can be used to accommodate other structures of the battery device 100, making the battery device 100 more compact. Furthermore, the two ends of the busbar component 150 extend beyond the support plates 1412 along the third direction Z. These two portions extending beyond the support plates 1412 can be connected to the electrode terminals 111 of two battery cells 110, thereby enabling the two battery cells 110 to be connected in series or in parallel.

[0120] In some embodiments, on the third direction Z, at least a portion of the support plate 1412 is located between the electrode terminals 111 of two adjacent battery cells 110.

[0121] In the third direction Z, at least a portion of the support plate 1412 is located between the electrode terminals 111 of two adjacent battery cells 110. This can mean that the entire support plate 1412 is located between the electrode terminals 111 of two adjacent battery cells 110 along the third direction Z, or that a portion of the support plate 1412 is located between the electrode terminals 111 of two adjacent battery cells 110 along the third direction Z, while another portion is located outside the electrode terminals 111 of two adjacent battery cells 110. At least a portion of the support plate 1412 is located between the electrode terminals 111 of two adjacent battery cells 110. This can mean that at least a portion of the support plate 1412 is disposed within the space between the electrode terminals 111 of two adjacent battery cells 110. The projection of the at least portion of the support plate 1412 along the first direction X onto the battery case is located between the projections of the electrode terminals 111 of the two adjacent battery cells 110 along the first direction X onto the battery case. The projection of the at least portion of the support plate 1412 along the third direction Z onto the battery case overlaps with the projections of the electrode terminals 111 of the two adjacent battery cells 110 along the third direction Z onto the battery case.

[0122] In the above solution, at least a portion of the support plate 1412 is disposed along the third direction Z in the space between the electrode terminals 111 of two adjacent battery cells 110, which allows for the rational use of this space and makes the structure of the insulating member 140 and the battery cell 110 more compact. Furthermore, the two protruding portions of the busbar 150 relative to the support plate 1412 can respectively fit against the corresponding electrode terminals 111 along the first direction X, facilitating the connection between the busbar 150 and the corresponding electrode terminals 111.

[0123] Please refer to Figure 5. In some embodiments, the second limiting part 143 is provided with a wire passage 1433. The wire passage 1433 connects the two sides of the second limiting part 143 along the second direction Y and is used for the wire harness 160 to pass through.

[0124] The wire passage 1433 is an opening structure on the second limiting part 143 for the wire harness 160 to pass through. It is formed by the second limiting part 143 along the second direction Y. The wire passage 1433 connects the two sides of the second limiting part 143 along the second direction Y. Since the main body 1411 and the support plate 1412 are arranged along the second direction Y, and the second limiting part 143 is located between the main body 1411 and the support plate 1412, the wire harness 160 can extend from one side of the main body 1411 along the first direction X through the wire passage 1433 to the other side of the support plate 1412 along the first direction X, so as to connect with the busbar 150 on the support plate 1412.

[0125] When the second limiting part 143 includes a limiting plate 1431 and a buckle 1432, a wire passage 1433 can be formed on the limiting plate 1431, so that the wire harness 160 can pass through the limiting plate 1431 through the wire passage 1433 and extend to connect with the busbar 150.

[0126] The wire passage 1433 can have various shapes. For example, the wire passage 1433 can be a regular shape such as a circular hole, or it can be an irregular shape. For example, the wire passage 1433 can include a wire hole 1434 and a notch 1435 connecting the wire hole 1434. The wire hole 1434 can be formed by the second limiting part 143 along the second direction Y, and its shape can be various. For example, the wire hole 1434 can be a square hole, a circle, or other irregular shapes. The notch 1435 is located on one side of the wire passage hole 1434 along the first direction X. It extends from the wire passage hole 1434 toward the edge of the second limiting portion 143 along the first direction X. Therefore, during the assembly of the wire harness 160, the wire harness 160 can enter the wire passage hole 1434 through the notch 1435. Furthermore, when it is necessary to disassemble the wire harness 160 in the wire passage hole 1434, the wire harness 160 can also be moved out of the wire passage hole 1434 through the notch 1435.

[0127] In the above scheme, based on the second limiting part 143 being set between the main body 1411 and the support plate 1412, the second limiting part 143 is further provided to form a wire passage 1433, so that the wire passage 1433 connects the two sides of the second limiting part 143 along the second direction Y. During the assembly process of the battery device 100, the wire harness 160 can extend directly from the main body 1411 through the wire passage 1433 to the side of the support plate 1412 along the first direction X, and connect with the busbar 150 located on the support plate 1412, without having to go around the second limiting part 143. On the one hand, this can reduce the assembly difficulty of the wire harness 160 and improve the assembly efficiency; on the other hand, it can shorten the length of the wire harness 160 and save costs.

[0128] In some embodiments, in the first direction X, the projection of the through hole 151 onto the insulating body 141 is located between the projections of the electrode terminals 111 of two adjacent battery cells 110 onto the insulating body 141.

[0129] In the above scheme, the projection of the through hole 151 along the first direction X onto the insulating body 141 is located between the projections of the electrode terminals 111 of two adjacent battery cells 110 along the first direction X onto the insulating body 141. That is, the through hole 151 is correspondingly set to the interval area between the two adjacent electrode terminals 111. The through hole 151 and the electrode terminals 111 are staggered. Compared with the arrangement where the projection of the through hole 151 along the first direction X onto the insulating body 141 overlaps with the projection of the electrode terminals 111 along the first direction X onto the insulating body 141, on the one hand, it can reduce the possibility that the through hole 151 occupies the space in the busbar component 150 used for connecting with the electrode terminals 111, increase the connection area between the busbar component 150 and the electrode terminals 111, reduce the connection resistance between the busbar component 150 and the electrode terminals 111, and help improve the current transmission capability between the electrode terminals 111 and the busbar component 150, and reduce the energy loss between them. On the other hand, it can reduce the risk of interference between the first limiting part 142 that cooperates with the through hole 151 and the electrode terminals 111.

[0130] In some embodiments, a plurality of battery cells 110 are arranged in a third direction Z, and the distance from the through hole 151 to the electrode terminal 111 of two adjacent battery cells 110 is the same along the third direction Z.

[0131] Specifically, the distance from the through-hole 151 along the third direction Z to the electrode terminals 111 of two adjacent battery cells 110 can be the minimum distance from the through-hole 151 along the third direction Z to the electrode terminals 111 of two adjacent battery cells 110, that is, the minimum distance from the edge of the through-hole 151 along the third direction Z to the edge of the electrode terminals 111 of two adjacent battery cells 110. Alternatively, this distance can also be the distance from the center of the through-hole 151 along the third direction Z to the center of the electrode terminals 111 along the third direction Z. In the embodiments of this application, "same" can mean approximately the same, but is not limited to being completely identical. For example, when the distance from the through-hole 151 along the third direction Z to the electrode terminals 111 of two adjacent battery cells 110 is the same, the two distance values ​​can have a slight difference.

[0132] In the above scheme, the through hole 151 is equidistant from the electrode terminals 111 of the two adjacent battery cells 110 along the third direction Z. In this case, the through hole 151 is approximately located at the center between the electrode terminals 111 of the two adjacent battery cells 110, which is also approximately located at the center of the busbar 150 along the third direction Z. This helps to improve the uniformity of stress distribution on the busbar 150. Furthermore, when the through hole 151 is approximately located at the center between the electrode terminals 111 of the two adjacent battery cells 110, the first limiting portion 142, which cooperates with the through hole 151, is also approximately located at the center between the electrode terminals 111 of the two adjacent battery cells 110. That is, the connection point between the insulating member 140 and the busbar 150 is approximately located at the center between the electrode terminals 111 of the two adjacent battery cells 110, which can improve the support stability of the insulating member 140 on the busbar 150.

[0133] Please refer to Figure 9. In some embodiments, the busbar component 150 is provided with a plurality of through holes 151. In the first direction X, the projections of the plurality of through holes 151 on the insulating body 141 are all located between the projections of the electrode terminals 111 of two adjacent battery cells 110 on the insulating body 141, and the plurality of through holes 151 are spaced apart along the second direction Y.

[0134] Specifically, in the insulating member 140, the number of first limiting portions 142 can be one or more. When the number of first limiting portions 142 is one, a portion of the first limiting portion 142 can simultaneously accommodate multiple through holes 151 of the busbar member 150. When the number of first limiting portions 142 is multiple, the multiple first limiting portions 142 can be configured to cooperate with the multiple through holes 151 one-to-one.

[0135] In the busbar component 150, a plurality of through holes 151 are arranged at intervals along the second direction Y between the electrode terminals 111 of two adjacent battery cells 110. The distance from any one of the plurality of through holes 151 to the electrode terminals 111 of the two adjacent battery cells 110 along the third direction Z can be the same or different. Furthermore, the distances from different through holes 151 to the electrode terminals 111 of the two adjacent battery cells 110 along the third direction Z are different.

[0136] In the above solution, by providing multiple through holes 151 in the area between the electrode terminals 111 of two adjacent battery cells 110 in the busbar component 150, and distributing the multiple through holes 151 at intervals along the second direction Y, the busbar component 150 can be further locked by cooperating with the first limiting part 142 through the multiple through holes 151 without occupying the space in the busbar component 150 used for connecting with the electrode terminals 111, thereby further improving the stability of the busbar component 150.

[0137] In some embodiments, at least one of the first limiting portion 142 and the second limiting portion 143 is integrally formed with the insulating body 141.

[0138] Specifically, the insulating body 141 can be integrally formed with the first limiting part 142, while being separate from the second limiting part 143. Alternatively, the insulating body 141 can be integrally formed with the second limiting part 143, while being separate from the first limiting part 142. Or, the insulating body 141, the first limiting part 142, and the second limiting part 143 can all be integrally formed.

[0139] The structure in which at least one of the first limiting portion 142 and the second limiting portion 143 is integrally formed with the insulating body 141 means that at least one of the first limiting portion 142 and the second limiting portion 143 and the insulating body 141 are manufactured into a whole using the same process, without the need for subsequent connection through additional processes. For example, at least one of the first limiting portion 142 and the second limiting portion 143 and the insulating body 141 can be formed using an injection molding process. During injection molding, at least one of the first limiting portion 142 and the second limiting portion 143 is connected to the insulating body 141 as a whole.

[0140] In the above solution, by setting at least one of the first limiting part 142 and the second limiting part 143 to be integrally formed with the insulating body 141, the connection reliability between at least one of the first limiting part 142 and the second limiting part 143 and the insulating body 141 can be improved, the stability of the busbar component 150 can be enhanced, and the assembly time between at least one of the first limiting part 142 and the second limiting part 143 and the insulating body 141 can be saved, thereby improving the assembly efficiency of the battery device 100.

[0141] Referring to Figure 10, in some embodiments, the busbar component 150 includes a first busbar 152, a second busbar 153, and a buffer 154. The first busbar 152 and the second busbar 153 are electrically connected to the electrode terminals 111 of the two battery cells 110, respectively. The buffer 154 is disposed between the first busbar 152 and the second busbar 153. A through hole 151 is disposed in the first busbar 152.

[0142] The first busbar 152 and the second busbar 153 are components in the busbar component 150 used to connect to the electrode terminals 111 of two battery cells 110. The first busbar 152 is connected to the electrode terminal 111 of one battery cell 110, and the second busbar 153 is connected to the electrode terminal 111 of the other battery cell 110. The first busbar 152 and the second busbar 153 are connected through a buffer 154, thereby realizing the series or parallel connection of the two battery cells 110.

[0143] The buffer section 154 is a component in the busbar 150 used to absorb the expansion force generated when the battery cell 110 expands and bulges, and deforms under the action of the expansion force. When the buffer section 154 deforms under the action of the expansion force, the direction and degree of its deformation are adapted to the relative position change of the electrode terminals 111 of the two battery cells 110.

[0144] During the use of the battery device 100, if the battery cell 110 expands and bulges, the position of the corresponding electrode terminal 111 will usually change as the battery cell 110 bulges, causing the relative position of the electrode terminals 111 of the two battery cells 110 to change. This causes the busbar 150 connected to the corresponding electrode terminal 111 to be pulled, making it easy to separate from the electrode terminal 111 and affecting the reliability of the connection.

[0145] Therefore, the above solution provides a buffer section 154 between the first busbar 152 and the second busbar 153. The buffer section 154 can absorb the corresponding expansion force and deform when the battery cell 110 expands and bulges, so as to buffer the relative position change between the electrode terminals 111 of the two battery cells 110, reduce the risk of the busbar component 150 separating from the electrode terminals 111 during the expansion of the battery cell 110 and causing connection failure, and improve the connection reliability between the busbar component 150 and the electrode terminals 111.

[0146] Optionally, the buffer portion 154 may have a curved extension tendency in the third direction Z. Therefore, when the battery cell 110 expands and bulges, the buffer portion 154 can absorb the corresponding expansion force and deform along the third direction Z to buffer the relative positional change between the electrode terminals 111 of the two battery cells 110. Furthermore, the buffer portion 154 may be arched to improve its buffering effect on the relative positional change between the electrode terminals 111 of the two battery cells 110.

[0147] The through hole 151 is provided in the first busbar 152. That is, the first limiting part 142 presses the busbar component 150 against the insulating body 141 through the through hole 151 in the first busbar 152. Compared with providing the through hole 151 on the buffer part 154, it can reduce the impact of the deformation of the buffer part 154 on the connection effect between the first limiting part 142 and the through hole 151, and improve the connection reliability between the first limiting part 142 and the busbar component 150.

[0148] In some embodiments, the insulating member 140 is symmetrically arranged along its centerline in the width direction.

[0149] The width direction of the insulating member 140 can be the second direction Y of this application. The line connecting the midpoints of the various parts of the insulating member 140 along the third direction Z in the second direction Y can form the aforementioned center line, which extends along the third direction Z. Along the aforementioned center line, the insulating member 140 is symmetrically arranged, and at this time, the center line is the axis of symmetry of the insulating member 140. When the insulating member 140 is symmetrically arranged along the center line, and the insulating body 141 includes a main body 1411 and a plurality of support plates 1412, the main body 1411 is provided with a plurality of support plates 1412 on both sides along the second direction Y, and the position, shape, size, etc. of the support plates 1412 on both sides are symmetrical along the center line.

[0150] In the above scheme, the insulating component 140 is arranged symmetrically along its own width direction centerline, which helps to improve the versatility of the insulating component 140 and reduce the mold opening cost of the insulating component 140.

[0151] In some embodiments, the insulating body 141 and the busbar component 150 are riveted together by a first limiting portion 142.

[0152] Specifically, there are various ways to rivet the insulating body 141 and the busbar component 150 together using the first limiting part 142. For example, the insulating body 141 and the busbar component 150 can be connected by hot riveting using the first limiting part 142, or by cold riveting or other riveting methods. For ease of explanation, this application embodiment uses hot riveting of the insulating body 141 and the busbar component 150 using the first limiting part 142 as an example to explain the following scheme.

[0153] During the connection process between the insulating component 140 and the busbar component 150, the material of the first limiting part 142 can be passed through the through hole 151 of the busbar component 150. Then, pressure is applied to the material of the first limiting part 142 by a hot riveting machine or hot riveting gun, causing the material to undergo plastic deformation, thereby forming a first part located in the through hole 151 and a second part located on the side of the busbar component 150 away from the insulating body 141 along the first direction X. At this time, the second part can protrude relative to the first part in a plane perpendicular to the first direction X. The busbar component 150 is locked to the insulating body 141 by the cooperation of the second part and the first part.

[0154] In the above solution, the insulating body 141 and the busbar component 150 are riveted together by the first limiting part 142, which can improve the reliability of the connection and reduce the difficulty of connection.

[0155] A second aspect of this application provides an energy storage device 400, including the battery device 100 of any of the above.

[0156] Please refer to Figures 11 and 12. A third aspect of the present application provides an energy storage system 2000, which includes the above-mentioned energy storage device 400.

[0157] The energy storage system 2000 includes an energy storage converter 500, which can be electrically connected to the generator 3000 to convert the electrical power provided by the generator 3000. The energy storage system 2000 may also include an energy storage device 400, which is electrically connected to the energy storage converter 500. The energy storage converter 500 converts the electrical energy provided by the generator 3000 and stores it in the energy storage device 400.

[0158] A power conversion device is used to connect the power generation device 3000 and the energy storage device 400. The power generation device 3000 generates electrical energy and stores it in the energy storage device 400 via the power conversion device. The use of the energy storage device 400 in the energy storage system 2000 effectively improves the operational safety of the energy storage system 2000. In specific implementations, the power generation equipment can be solar panels, hydroelectric power generation equipment, thermal power generation equipment, etc. This application does not limit the specific type of power generation equipment.

[0159] As an example, as shown in Figure 11, the energy storage system 2000 includes an energy storage device 400 and an energy storage converter 500. The two power generation devices 3000 respectively transmit the generated electrical energy to the energy storage converter 500, and the energy storage converter 500 introduces the electrical energy into the energy storage device 400 for storage.

[0160] Please refer to Figure 12. The energy storage device 400 includes an energy storage box 410, and a battery device 100 is disposed inside the energy storage box 410.

[0161] As an example, the energy storage device 400 can be an energy storage container, an energy storage cabinet, etc.

[0162] As an example, energy storage device 400 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 power stations can store electrical energy during off-peak hours and provide power to relevant users or electrical equipment during peak hours. Wind power generation systems collect wind energy from wind turbines, convert it into electrical energy, and store it in energy storage device 400. Solar power generation systems can convert solar energy into electrical energy, store it in energy storage device 400, and supply it to users as needed. Mobile power systems can supply power to relevant electrical equipment in areas where the mains power supply cannot reach, such as remote mountainous areas and remote wilderness areas. Temporary power supply systems can provide power to users when there is insufficient power.

[0163] Referring to Figures 12 and 13, a fourth aspect of this application provides a charging network 4000, including the aforementioned energy storage device. The charging network 4000 includes a charging pile 600 for charging electrical equipment. The charging network 4000 may further include an energy storage device 400, which is electrically connected to the charging pile 600 and provides power to the charging pile 600.

[0164] It should be noted that the charging pile 600 and the battery cells in the energy storage device 400 are electrically connected via cables, and the battery cells can supply their stored electrical energy to the charging pile 600. The charging pile 600 has a connector that can be connected to electrical equipment, thereby replenishing the equipment's power. The application of the energy storage device 400 in this charging network 4000 can effectively improve the safety of the charging network 4000 and also help to enhance the flexibility of the charging network 4000 during deployment.

[0165] In a charging network 4000, there can be one charging pile 600, and the energy storage device 400 provides power to the one charging pile 600; there can also be multiple charging piles 600, and the energy storage device 400 provides power to multiple charging piles 600.

[0166] As an example, as shown in Figure 13, the charging network 4000 includes an energy storage device 400 and two charging piles 600, with the energy storage device 400 providing power to the two charging piles 600.

[0167] The energy storage device 400 may include a battery device 100, which is electrically connected to the charging pile 600 so that the battery device 100 can provide power to the charging pile 600.

[0168] The energy storage device provided in this application has the technical effects of the battery device 100 in any of the above embodiments. The explanations of the same or corresponding structures and terms as those in the above embodiments will not be repeated here.

[0169] According to some embodiments of this application, the battery device 100 includes a battery housing, a plurality of battery cells 110, an insulating member 140, and a current-carrying component 150. The battery housing forms a receiving cavity, in which the plurality of battery cells 110 are disposed. Each battery cell 110 has an electrode terminal 111 on one side along a first direction X. The insulating member 140 is disposed in the receiving cavity and includes an insulating body 141, a first limiting portion 142, and a second limiting portion 143. The insulating body 141 is located on one side of the plurality of battery cells 110 along the first direction X. The first limiting portion 142 and the second limiting portion 143 protrude from the insulating body 141 on the side away from the battery cells 110 along the first direction X. The first limiting portion 142 includes a first portion. The first part and the second part are disposed on the side of the first part away from the insulating body 141 along the first direction X; the busbar 150 is connected to the electrode terminal 111, at least a portion of the busbar 150 is located on the side of the insulating body 141 away from the battery cell 110 along the first direction X, the busbar 150 is provided with a through hole 151, the first part of the first limiting part 142 is accommodated in the through hole 151, in the first direction X, a portion of the busbar 150 is located between the second part of the first limiting part 142 and the insulating body 141, the second limiting part 143 is arranged with the busbar 150 along the second direction Y to limit the range of rotation of the busbar 150 around the first limiting part 142, the first direction X and the second direction Y intersect each other. The second limiting part 143 includes a limiting plate 1431 and a buckle 1432. The limiting plate 1431 is connected to the insulating body 141 and is arranged along the second direction Y with the current-combining component 150. The buckle 1432 is disposed on the limiting plate 1431 and is spaced apart from the insulating body 141 along the first direction X. The battery device 100 also includes a wiring harness 160, which is disposed on the insulating body 141. At least a portion of the wiring harness 160 is located between the insulating body 141 and the buckle 1432 along the first direction X. The insulating body 141 includes a main body part 1411 and a support plate 1412 arranged along the second direction Y. The current-combining component 150 is located on one side of the support plate 1412 along the first direction X, and the second limiting part 143 is located between the main body part 1411 and the support plate 1412. Multiple battery cells 110 are arranged along a third direction Z. Multiple support plates 1412 and multiple busbar components 150 are also present, spaced apart along the third direction Z. In the third direction Z, the two ends of the busbar component 150 extend beyond the support plate 1412 and connect to the electrode terminals 111 of two battery cells 110. The third direction Z intersects at a first direction X and a second direction Y. A second limiting part 143 is provided with a wire passage 1433, which connects both sides of the second limiting part 143 along the second direction Y, and is used for the passage of a wire harness 160.The current-carrying component 150 includes a first current-carrying section 152, a second current-carrying section 153, and a buffer section 154. The first current-carrying section 152 and the second current-carrying section 153 are electrically connected to the electrode terminals 111 of the two battery cells 110, respectively. The buffer section 154 is disposed between the first current-carrying section 152 and the second current-carrying section 153. A through hole 151 is disposed in the first current-carrying section 152. The insulating member 140 is symmetrically arranged along its centerline in the width direction.

[0170] Although this application has been described with reference to preferred embodiments, various modifications can be made thereto and components can be replaced with equivalents without departing from the scope of this application. In particular, the technical features mentioned in the various embodiments can be combined in any manner, provided there is no structural conflict. 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, comprising: The battery casing has a receiving cavity. Multiple battery cells are disposed in the receiving cavity, and each battery cell has an electrode terminal on one side along the first direction; An insulating component is disposed in the receiving cavity. The insulating component includes an insulating body, a first limiting portion, and a second limiting portion. The insulating body is located on one side of the plurality of battery cells along the first direction. The first limiting portion and the second limiting portion protrude from the insulating body on the side away from the battery cells along the first direction. The first limiting portion includes a first part and a second part. The second part is disposed on the side of the first part away from the insulating body along the first direction. A busbar is connected to the electrode terminal. At least a portion of the busbar is located on the side of the insulating body away from the battery cell along the first direction. The busbar has a through hole. A first portion of the first limiting portion is accommodated in the through hole. In the first direction, a portion of the busbar is located between the second portion of the first limiting portion and the insulating body. The second limiting portion and the busbar are arranged along a second direction. The first direction and the second direction intersect each other.

2. The battery device according to claim 1, wherein, The second limiting part includes a limiting plate and a buckle. The limiting plate is connected to the insulating body and is arranged along the second direction with the busbar component. The buckle is disposed on the limiting plate and is spaced apart from the insulating body along the first direction. The battery device further includes a wiring harness disposed on the insulating body, with at least a portion of the wiring harness located between the insulating body and the clip along the first direction.

3. The battery device according to claim 1 or 2, wherein, The insulating body includes a main body portion and a support plate arranged along the second direction, the busbar component is located on one side of the support plate along the first direction, and the second limiting portion is located between the main body portion and the support plate.

4. The battery device according to claim 3, wherein, Multiple battery cells are arranged along a third direction, and there are multiple support plates and multiple busbar components, all of which are spaced apart along the third direction. In the third direction, both ends of the busbar extend beyond the support plate and are respectively connected to the electrode terminals of two battery cells, and the third direction intersects the first direction and the second direction respectively.

5. The battery device according to claim 3 or 4, wherein, In the third direction, at least part of the support plate is located between the electrode terminals of two adjacent battery cells.

6. The battery device according to any one of claims 3-5, wherein, The second limiting part is provided with a wire passage, which connects the two sides of the second limiting part along the second direction, and the wire passage is used for the wire harness to pass through.

7. The battery device according to any one of claims 1-6, wherein, In the first direction, the projection of the through hole on the insulating body is located between the projections of the electrode terminals of two adjacent battery cells on the insulating body.

8. The battery device according to claim 7, wherein, The plurality of battery cells are arranged along a third direction, and the distance from the through hole to the electrode terminals of two adjacent battery cells along the third direction is the same.

9. The battery device according to claim 7 or 8, wherein, The busbar component is provided with a plurality of through holes. In the first direction, the projections of the plurality of through holes on the insulating body are all located between the projections of the electrode terminals of two adjacent battery cells on the insulating body, and the plurality of through holes are spaced apart along the second direction.

10. The battery device according to any one of claims 1-9, wherein, At least one of the first limiting part and the second limiting part is integrally formed with the insulating body.

11. The battery device according to any one of claims 1-10, wherein, The current-combining component includes a first current-combining section, a second current-combining section, and a buffer section. The first current-combining section and the second current-combining section are respectively electrically connected to the electrode terminals of the two battery cells. The buffer section is disposed between the first confluence section and the second confluence section, and the through hole is disposed in the first confluence section.

12. The battery device according to any one of claims 1-11, wherein, The insulating element is symmetrically arranged along its centerline in the width direction of its own component; And / or, the insulating body and the busbar are riveted together by the first limiting part.

13. An energy storage device, wherein, Includes the battery device according to any one of claims 1-12.

14. An energy storage system, wherein, Includes the energy storage device as described in claim 13.

15. A charging network, wherein, Includes the energy storage device as described in claim 13.

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