Battery device and electric device

Abstract

The utility model discloses a battery device and a power utilization device, the battery device comprises a box body, a plurality of battery monomer assemblies, a connecting part, an insulating part and a busbar, and an accommodating cavity is formed in the box body; the plurality of battery monomer assemblies are arranged in the accommodating cavity and are arranged along a first direction, each battery monomer assembly comprises a plurality of battery monomers arranged along a second direction, an electrode terminal is arranged on one side of each battery monomer along a third direction, and the busbar is arranged on the insulating part and is connected to the electrode terminal; the first direction, the second direction and the third direction are perpendicular to one another; the connecting part is arranged on one side of the battery monomer assembly along the third direction, in the first direction, at least part of the connecting part is arranged between the electrode terminals of the two adjacent battery monomers and is connected to the two adjacent battery monomers, and the connecting part is connected to the insulating part, so that the connecting strength between the corresponding battery monomers can be improved; and the use performance of the battery device is improved.

Description

Technical Field

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

[0002] In recent years, power batteries have made great development. Power batteries can be widely used in energy storage power systems such as hydraulic, thermal, wind, and solar power stations, as well as in multiple fields such as electric vehicles, electric tools, military equipment, and aerospace.

[0003] Power batteries are usually formed by connecting multiple battery cells in series or in parallel. However, currently, the connection strength between the battery cells is low, which affects the performance of the power battery. Summary of the Utility Model

[0004] The embodiments of the present application provide a battery device and an electrical device, which can improve the performance of the battery device.

[0005] In a first aspect, the embodiments of the present application provide a battery device, including a box body, a plurality of battery cell assemblies, a connection component insulator, and a bus bar. The box body forms a receiving cavity; the plurality of battery cell assemblies are arranged in the receiving cavity along a first direction. Each battery cell assembly includes a plurality of battery cells arranged along a second direction. Each battery cell is provided with an electrode terminal on one side along a third direction. The first direction, the second direction, and the third direction are perpendicular to each other; the connection component is arranged on one side of the battery cell assembly along the third direction. In the first direction, at least a part of the connection component is arranged between the electrode terminals of two adjacent battery cells and is connected to the two adjacent battery cells. The insulator is connected to the connection component; the bus bar is arranged on the insulator and is connected to the electrode terminal.

[0006] In the above solution, a connection component is arranged on one side of the battery cell assembly along the third direction. In the first direction, at least a part of the connection component is located between the electrode terminals of two adjacent battery cells, so as to arrange the connection component by at least utilizing the space between the shoulders of the two adjacent battery cells, reducing the space occupied by the connection component in the receiving cavity of the box body. Moreover, the connection component can at least connect the two adjacent battery cells, thereby improving the connection strength between the corresponding battery cells and improving the performance of the battery device. In addition, the present application also connects the connection component to the insulator, which can improve the structural strength and stability of the connection component, further improving the connection strength and connection reliability between the corresponding battery cells connected by the connection component and improving the performance of the battery device.

[0007] In some embodiments, the connection component includes a main body portion and a first bonding portion, and the main body portion is adhesively connected to the battery cell through the first bonding portion.

[0008] In the above solution, the connecting component includes a main body portion and a first bonding portion. The main body portion is adhesively connected to the battery cell through the first bonding portion. Compared with the case where the connecting component is connected to the battery cell by welding or other means, the connection difficulty between the connecting component and the battery cell can be reduced.

[0009] In some embodiments, in the third direction, at least a part of the insulating member is disposed between the bus bar and the battery cell. The insulating member is formed with an exposing hole for exposing the electrode terminal, and the bus bar is electrically connected to the electrode terminal through the exposing hole.

[0010] In the above solution, at least a part of the insulating member is disposed between the bus bar and the battery cell in the third direction. Therefore, at least a part of the insulating member can support and fix the bus bar. On this basis, an exposing hole for exposing the electrode terminal is formed in the insulating member, so that the bus bar on the insulating member is directly electrically connected to the electrode terminal through the exposing hole, which helps to simplify the assembly steps of the bus bar and improve the assembly efficiency.

[0011] In some embodiments, a receiving recess is provided on the side of the insulating member facing the battery cell, and at least a part of the connecting component is disposed in the receiving recess.

[0012] In the above solution, by providing a receiving recess on the side of the insulating member facing the battery cell, at least a part of the connecting component is disposed in the receiving recess. On the one hand, the risk of interference between the connecting component and the insulating member can be reduced. On the other hand, at least a part of the connecting component can be isolated and protected by the insulating member, which helps to improve the use reliability and service life of the connecting component.

[0013] In some embodiments, in the third direction, the thickness of the connecting component is greater than the thickness of the insulating member.

[0014] In the above solution, setting the thickness of the connecting component in the third direction to be greater than the thickness of the insulating member in the third direction can make the connecting component have higher structural strength than the insulating member, that is, the connecting component is more tensile than the insulating member. By connecting at least two battery cells through the connecting component, compared with connecting at least two battery cells through the insulating member, the connection strength and connection reliability between the corresponding battery cells can be further improved, thereby enhancing the use performance of the battery device.

[0015] In some embodiments, the connecting component includes a main body portion and a second bonding portion, and the main body portion is adhesively connected to the insulating member through the second bonding portion.

[0016] In the above solution, the connecting component includes a main body portion and a second bonding portion, and the main body portion is adhesively connected to the insulating member through the second bonding portion. Compared with the case where the connecting component is connected to the insulating member by welding or other means, the connection difficulty between the connecting component and the battery cell can be reduced.

[0017] In some embodiments, two electrode terminals are provided on one side of the battery cell along the third direction, and the two electrode terminals are arranged at intervals along the first direction. The battery device further includes a heat exchange plate, which is disposed on one side of the battery cell along the third direction, and at least a part of the heat exchange plate is located between the two electrode terminals of the battery cell, and the heat exchange plate is used for heat exchange with the battery cell.

[0018] In the above solution, by providing a heat exchange plate on one side of the battery cell along the third direction and performing heat exchange between the heat exchange plate and the battery cell, the risk of thermal failure of the battery cell can be reduced. On this basis, at least a part of the heat exchange plate is disposed between the two electrode terminals of the battery cell, so as to utilize the space between the two electrode terminals to arrange the heat exchange plate, which helps to improve the space utilization rate in the battery device.

[0019] In some embodiments, flanging portions are provided at both ends of the insulating member along the first direction, and the flanging portions are connected to the heat exchange plate.

[0020] In the above solution, by providing the flanging portions connected to the heat exchange plate, it helps to improve the structural stability of the insulating member and the heat exchange plate, and also makes the structures of components such as the heat exchange plate and the insulating member more compact.

[0021] In some embodiments, the flanging portion includes a first sub-portion and a second sub-portion connected to the first sub-portion. The first sub-portion is disposed between the bus bar and the heat exchange plate along the first direction, and the second sub-portion is disposed on the side of the heat exchange plate away from the battery cell along the third direction.

[0022] In the above solution, by providing the flanging portion including the first sub-portion and the second sub-portion connected to the first sub-portion, with the first sub-portion disposed between the bus bar and the heat exchange plate along the first direction and the second sub-portion disposed on the side of the heat exchange plate away from the battery cell along the third direction, the heat exchange plate and the bus bar can be better isolated by the first sub-portion and the second sub-portion, reducing the risk of interference between the two.

[0023] In some embodiments, the connecting member extends along the second direction, and the connecting member connects the battery cells in each of two adjacent battery cell assemblies.

[0024] In the above solution, the connecting member connects the battery cells in each of two adjacent battery cell assemblies. That is to say, the connecting member can not only connect two adjacent battery cells along the first direction, but also connect multiple battery cells arranged in the second direction, which helps to improve the integrity and stability of the two adjacent battery cell assemblies and further enhance the performance of the battery device.

[0025] In some embodiments, the number of the connecting members is multiple, and the multiple connecting members are arranged at intervals along the first direction, and each connecting member connects the battery cells in the corresponding two adjacent battery cell assemblies.

[0026] In the above solution, connecting the battery cells in multiple battery cell assemblies through multiple connecting components helps to improve the integrity and stability of each battery cell assembly, and further enhances the performance of the battery device.

[0027] In some embodiments, the box body includes a box main body and a bottom plate. One side of the box main body in the third direction has an opening, and the bottom plate covers the opening and encloses a receiving cavity with the box main body. In the third direction, the connecting component is located on the side of the battery cell assembly facing the bottom plate.

[0028] In the above solution, in the third direction, the connecting component is located on the side of the battery cell assembly facing the bottom plate. Correspondingly, in the battery cell assembly, components such as electrode terminals, insulating parts, bus bars, heat exchange plates, and pressure relief mechanisms are all located on the side of the battery cell facing the bottom plate in the third direction. Therefore, when a thermal failure occurs inside the battery cell, the high-temperature and high-pressure substances inside it can be discharged towards the bottom plate, that is, discharged downward, thereby reducing the risk of damage to the operator and other structures of the electrical device caused by the high-temperature and high-pressure substances.

[0029] In a second aspect, an embodiment of the present application further provides an electrical device including the above battery device.

[0030] The above description is only an overview of the technical solution of the present application. In order to be able to more clearly understand the technical means of the present application, it can be implemented according to the content of the description. And in order to make the above and other purposes, features, and advantages of the present application more obvious and understandable, the following specifically gives the specific implementation manners of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings required to be used in the embodiments of the present application. Obviously, the following described drawings are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0032] Figure 1 A simple schematic diagram of a vehicle provided by an embodiment of the present application;

[0033] Figure 2 An exploded view of a battery device provided by some embodiments of the present application;

[0034] Figure 3 A structural schematic diagram of a battery cell assembly provided by some embodiments of the present application;

[0035] Figure 4 A top view of a battery device provided by some embodiments of the present application;

[0036] Figure 5 ForFigure 4 Schematic cross-sectional view at A-A in [the figure];

[0037] Figure 6 is Figure 5 Partial enlarged view at BB in [the figure];

[0038] Figure 7 is Figure 5 Partial enlarged view at CC in [the figure];

[0039] Figure 8 Explosion view of the battery device provided by some embodiments of the present application.

[0040] The reference numerals in the attached drawings are as follows:

[0041] Vehicle 1000; Battery device 100; Controller 200; Motor 300;

[0042] Box body 110; First part 111; Second part 112; Box main body 113; Bottom plate 114; Battery cell assembly 120; Battery cell 121; Electrode terminal 122; Connecting member 130; Insulating member 140; Receiving recess 141; Flanging part 142; First sub-part 1421; Second sub-part 1422; Bus bar 150; Heat exchange plate 160; Pressure relief mechanism 170; First direction X; Second direction Y; Third direction Z. Detailed implementation manners

[0043] The following further describes the implementation manners of the present application in detail with reference to the drawings and embodiments. The detailed descriptions and drawings of the following embodiments are used to exemplarily illustrate the principle of the present application, but cannot be used to limit the scope of the present application, that is, the present application is not limited to the described embodiments.

[0044] In the description of the present application, it should be noted that unless otherwise specified, the meaning of "a plurality of" is two or more; the orientation or positional relationships indicated by the terms "upper", "lower", "left", "right", "inner", "outer", etc. are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be understood as a limitation to the present application. In addition, the terms "first", "second", "third", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. "Vertical" is not strictly vertical, but within the allowable error range. "Parallel" is not strictly parallel, but within the allowable error range.

[0045] References to "embodiments" in this application mean that specific features, structures, or characteristics described in connection with the embodiments can be included in at least one embodiment of this application. The phrase appears in various places in the specification and does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described in this application can be combined with other embodiments.

[0046] The orientation terms used in the following description are the directions shown in the figures and do not limit the specific structure of this application. In the description of this application, it should also be noted that unless otherwise clearly specified and limited, the terms "mounted", "connected", and "coupled" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0047] The battery device mentioned in the embodiments of this application may include one or more battery cell assemblies for providing voltage and capacity. The battery cell assembly may include a plurality of battery cells, and the plurality of battery cells are connected in series, parallel, or in a hybrid connection through busbars.

[0048] As a key component of the battery device, the performance of the battery cell is crucial for the battery device. In the battery device, a plurality of battery cells are connected to form a battery cell assembly, and the battery cell assembly is fixed inside the housing of the battery device. During use, the housing of the battery device is connected to other structures of the electrical device to supply power to the electrical device through each battery cell. However, in current battery devices, the connection strength between the battery cells is low, and it is prone to situations such as offset or interference during use, affecting the performance of the battery device.

[0049] In view of this, the embodiments of this application provide a battery device, including a housing, a plurality of battery cell assemblies, and a connecting component. The housing forms a receiving cavity; the plurality of battery cell assemblies are disposed in the receiving cavity and arranged along a first direction. Each battery cell assembly includes a plurality of battery cells arranged along a second direction. Each battery cell is provided with an electrode terminal on one side along a third direction. The first direction, the second direction, and the third direction are perpendicular to each other; the connecting component is disposed on one side of the battery cell assembly along the third direction. In the first direction, at least a part of the connecting component is disposed between the electrode terminals of two adjacent battery cells and connected to the two adjacent battery cells. On the one hand, at least the space between the shoulders of two adjacent battery cells can be utilized to arrange the connecting component, reducing the space occupied by the connecting component in the receiving cavity of the housing. On the other hand, by connecting at least two adjacent battery cells through the connecting component, the connection strength between the corresponding battery cells can be improved, thereby improving the performance of the battery device.

[0050] In some embodiments, a battery cell generally includes an electrode assembly. The electrode assembly includes a positive electrode, a negative electrode, and a separator disposed between the negative electrode and the positive electrode. During the charge and discharge process of the battery cell, active ions (such as lithium ions) are embedded and extracted back and forth between the positive electrode and the negative electrode. The separator is disposed between the positive electrode and the negative electrode, which can prevent the short circuit between the positive and negative electrodes and allow the active ions to pass through.

[0051] In some embodiments, the battery cell may include a housing. The housing can be a steel shell, an aluminum shell, a plastic shell (such as polypropylene), a composite metal shell (such as a copper-aluminum composite shell), or an aluminum plastic film, etc. In some embodiments, the housing can be a sealed structure or a non-sealed structure.

[0052] As an example, when the housing is a non-sealed structure, the housing serves to protect the electrode assembly, and there is also a sealed bag between the housing and the electrode assembly, which is used to encapsulate the electrode assembly and the electrolyte. Specifically, the sealed bag can be a bag-shaped insulating member or an aluminum plastic film. When the housing is a sealed structure, it is used to encapsulate components such as the electrode assembly and the electrolyte.

[0053] As an example, the battery cell can be a cylindrical battery cell, a prismatic battery cell, a soft-pack battery cell, or a battery cell of other shapes. The prismatic battery cell includes a square-shell battery cell, a blade-shaped battery cell, a multi-prismatic battery, and the multi-prismatic battery is, for example, a hexagonal prism battery, etc. There is no particular limitation in this application.

[0054] The technical solutions described in the embodiments of this application are applicable to various electrical devices using battery devices, such as mobile phones, portable devices, laptop computers, battery cars, electric toys, electric tools, vehicles, ships, and spacecrafts, etc. For example, spacecrafts include airplanes, rockets, space shuttles, and spaceships, etc.

[0055] The battery devices described in the embodiments of this application are not limited to the above-described electrical devices, but for the sake of simplicity of description, the following embodiments will be described by taking electric vehicles as an example.

[0056] Please refer to Figure 1 , Figure 1A simplified schematic diagram of a vehicle 1000 provided by an embodiment of the present application. The vehicle 1000 can be a fuel vehicle, a gas vehicle, or a new energy vehicle. The new energy vehicle can be a pure electric vehicle, a hybrid vehicle, an extended-range vehicle, etc. A battery device 100 can be provided inside the vehicle 1000. Specifically, for example, the battery device 100 can be provided at the bottom, the front end, or the rear end of the vehicle 1000. The battery device 100 can be used to supply power to the vehicle 1000. For example, the battery device 100 can serve as the operating power source of the vehicle 1000. The vehicle 1000 can also include a controller 200 and a motor 300. The controller 200 is used to control, for example, the battery to supply power to the motor 300. The battery device 100 can be used for starting, navigation, etc. of the vehicle 1000. Of course, the battery device 100 can also be used to drive the vehicle 1000 to travel, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000.

[0057] In some embodiments of the present application, the battery device 100 can not only serve as the operating power source of the vehicle 1000, but also serve as the driving power source of the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000.

[0058] Please refer to Figure 2 and Figure 3 , Figure 2 An exploded view of the battery device 100 provided by some embodiments of the present application, Figure 3 A schematic structural diagram of the battery cell assembly 120 provided by some embodiments of the present application. The battery device 100 includes a box body 110 and battery cells 121. In some embodiments, the box body 110 can include a first part 111 and a second part 112. The first part 111 and the second part 112 cover each other, and the first part 111 and the second part 112 jointly define a receiving cavity for accommodating the battery cells 121. The second part 112 can be a hollow structure with one end open, and the first part 111 can be a plate-like structure. The first part 111 covers the open side of the second part 112 so that the first part 111 and the second part 112 jointly define the receiving cavity; the first part 111 and the second part 112 can also both be hollow structures with one side open, and the open side of the first part 111 covers the open side of the second part 112. Of course, the box body 110 formed by the first part 111 and the second part 112 can be in various shapes, such as a cylinder, a cuboid, etc.

[0059] In the embodiments of the present application, the battery cell 121 can be a secondary battery. A secondary battery refers to a battery cell 121 that can be activated by charging after discharging so as to be used continuously.

[0060] The battery cell 121 can be a lithium-ion battery, a sodium-ion battery, a sodium-lithium-ion battery, a lithium metal battery, a sodium metal battery, a lithium-sulfur battery, a magnesium-ion battery, a nickel-metal hydride battery, a nickel-cadmium battery, a lead-acid battery, etc., and the embodiments of the present application are not limited thereto.

[0061] In some embodiments, the battery cell assembly 120 is generally formed by arranging a plurality of battery cells 121.

[0062] As an example, the battery cell assembly 120 can be a battery module, and the battery module is formed by arranging and fixing a plurality of battery cells 121 into an independent module. As an example, the battery module can be formed by bundling a plurality of battery cells 121 with cable ties.

[0063] In some embodiments, the battery device 100 can be a battery pack, and the battery pack includes a box body 110 and one or more battery cell assemblies 120, and the battery cell assembly 120 is accommodated in the box body 110.

[0064] As an example, the battery cell assembly 120 can be a battery module, and the battery cell assembly 120 can be accommodated in the box body 110 by fixing the battery module in the box body 110.

[0065] As an example, the battery cell assembly 120 can also be accommodated in the box body 110 by directly fixing a plurality of battery cells 121 to the box body 110.

[0066] As an example, the box body 110 can include a first part 111 and a second part 112. The first part 111 and the second part 112 are snapped together so that a closed space is formed inside the box body 110 to accommodate the battery cell assembly 120. The term "closed" here means covered or closed, which can be sealed or non-sealed. The first part 111 can be a top cover or a bottom plate.

[0067] As an example, the box body 110 can include a top cover, a frame, and a bottom plate. The top cover and the bottom plate are respectively connected to the frame so that a closed space is formed inside the box body 110 to accommodate the battery cell assembly 120.

[0068] In some embodiments, the box body 110 can be a part of the chassis structure of the vehicle 1000. For example, a part of the box body 110 can become at least a part of the floor of the vehicle 1000, or a part of the box body 110 can become at least a part of the cross beam and longitudinal beam of the vehicle 1000.

[0069] Please refer to Figure 3, in the battery device 100, there may be multiple battery cells 121. The multiple battery cells 121 can be connected in series, parallel, or in a combined series-parallel connection. A combined series-parallel connection means that among the multiple battery cells 121, there are both series and parallel connections. The multiple battery cells 121 can be directly connected in series, parallel, or in a combined series-parallel connection together, and then the whole formed by the multiple battery cells 121 is accommodated in the box 110. Of course, in the battery device 100, multiple battery cells 121 can also be first connected in series, parallel, or in a combined series-parallel connection to form a battery module, and then multiple battery modules are connected in series, parallel, or in a combined series-parallel connection to form a whole and are accommodated in the box 110.

[0070] Among them, each battery cell 121 can be a secondary battery cell 121 or a primary battery cell 121; it can also be a lithium-sulfur battery cell 121, a sodium-ion battery cell 121, or a magnesium-ion battery cell 121, but is not limited thereto. The battery cell 121 can be in the shape of a cylinder, a flat body, a cuboid, or other shapes, etc.

[0071] In some embodiments, the outer shell includes a housing and an end cap. The housing has an opening, and the end cap is connected to the housing and covers the opening; the housing is a component for cooperating with the end cap to form an internal cavity of the battery cell 121, and the formed internal cavity can be used to accommodate the electrode assembly, the electrolyte, and other components. The housing can be provided with one or more openings. One or more end caps can also be provided. The housing and the end cap can be independent components.

[0072] Exemplarily, an opening can be provided on the housing, and the end cap covers the opening at the opening to form the internal cavity of the battery cell 121. The housing can be of various shapes and various sizes, such as cuboid. Specifically, the shape of the housing can be determined according to the specific shape and size of the electrode assembly. The material of the housing can be various, 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 cooperate with the housing. The material of the end cap 12 can be the same as or different from the material of the housing. Optionally, the end cap can be made of a material with a certain hardness and strength (such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc.). In this way, the end cap is not easily deformed when being squeezed or collided, enabling the battery cell 121 to have a higher structural strength and the reliability performance can also be improved. The end cap is connected to the housing by welding, bonding, clamping, or other means. The housing can have an opening at one end or at both ends. In some examples, the housing can be a structure with an opening on one side, and one end cap is provided and covers the housing. In other examples, the housing can also be a structure with openings on both sides, and two end caps are provided, and the two end caps respectively cover the two openings of the housing. The electrode assembly is a component that undergoes an electrochemical reaction in the battery cell 121. The housing can contain one or more electrode assemblies.

[0073] In some embodiments, at least one electrode terminal 122 is provided on the outer casing, and the electrode terminal 122 is electrically connected to the tab. The electrode terminal 122 can be directly connected to the tab or indirectly connected to the tab through a current collector member. The electrode terminal 122 can be provided on the end cap or on the housing.

[0074] In some embodiments, a pressure relief mechanism 170 is provided on the outer casing. The pressure relief mechanism 170 is used to discharge the internal gas of the battery cell.

[0075] As an example, it is actuated to release the internal pressure or temperature when the internal pressure or temperature of the battery cell 121 reaches a predetermined threshold. When the internal pressure or temperature of the battery cell 121 reaches a predetermined threshold, the pressure relief mechanism 170 performs an action or a weak structure provided in the pressure relief mechanism 170 is damaged, thereby forming an opening or channel for discharging the internal pressure or temperature. This threshold design varies according to different design requirements. The threshold may depend on one or several materials of the positive electrode plate, negative electrode plate, electrolyte, and separator in the battery cell 121.

[0076] As an example, the pressure relief mechanism 170 can be integrally formed with the outer casing.

[0077] As an example, the pressure relief mechanism 170 can also be separately provided and connected to the outer casing.

[0078] As used in this application, "actuate" means that the pressure relief mechanism 170 generates an action or is activated to a certain state, so that the internal pressure and temperature of the battery cell 121 can be released. The actions generated by the pressure relief mechanism 170 can include but are not limited to: the components in the pressure relief mechanism 170 move to form an exhaust channel, at least a part of the pressure relief mechanism 170 breaks, shatters, is torn or opened, etc. When the pressure relief mechanism 170 is actuated, the high-temperature and high-pressure substances inside the battery cell 121 will be discharged outward from the actuated part as emissions. In this way, the battery cell 121 can be depressurized and cooled under a controllable pressure or temperature, thereby avoiding potential more serious accidents.

[0079] In some embodiments, when the outer casing is a non-sealed structure, the pressure relief mechanism 170 can be provided as a through hole for discharging the internal gas of the battery cell 121.

[0080] The emissions from the battery cell 121 mentioned in this application include but are not limited to: electrolyte, dissolved or split positive and negative electrode plates, fragments of the separator, high-temperature and high-pressure gases generated by the reaction, flames, etc.

[0081] Next, the embodiments of this application will specifically describe the structure of the battery device 100 with reference to the drawings.

[0082] Please refer to Figures 2 to 6, in a first aspect, an embodiment of the present application provides a battery device 100, including a box body 110, a plurality of battery cell assemblies 120, a connection component 130, an insulating component 140, and a bus bar 150. The box body 110 forms a receiving cavity; the plurality of battery cell assemblies 120 are arranged in the receiving cavity and arranged along a first direction X. Each battery cell assembly 120 includes a plurality of battery cells 121 arranged along a second direction Y. An electrode terminal 122 is provided on one side of each battery cell 121 along a third direction Z. The first direction X, the second direction Y, and the third direction Z are perpendicular to each other; the connection component 130 is arranged on one side of the battery cell assembly 120 along the third direction Z. In the first direction X, at least a part of the connection component 130 is arranged between the electrode terminals 122 of two adjacent battery cells 121 and is connected to the two adjacent battery cells 121. The insulating component 140 is connected to the connection component 130; the bus bar 150 is arranged on the insulating component 140, and the bus bar 150 is connected to the electrode terminal 122.

[0083] In the embodiment of the present application, the first direction X, the second direction Y, and the third direction Z are perpendicular to each other in pairs. Exemplarily, the first direction X can be any one of the width direction and the length direction of the box body 110, the second direction Y can be the other, and the third direction Z can be the height direction of the box body 110.

[0084] The structure of the box body 110 can be various. Exemplarily, the box body 110 can include a first part 111 and a second part 112 that are covered with each other, and the receiving cavity is formed by jointly enclosing the first part 111 and the second part 112. Exemplarily, the box body 110 can include a box body 113 and a bottom plate 114. The box body 113 is provided with an opening, and the opening is covered by the bottom plate 114 to enclose and form the receiving cavity.

[0085] The number of the battery cell assemblies 120 can be multiple. The multiple battery cell assemblies 120 are arranged in the receiving cavity and arranged along the first direction X in the receiving cavity. Each battery cell assembly 120 includes a plurality of battery cells 121 arranged along the second direction Y. It can be known that the number of the battery cells 121 in different battery cell assemblies 120 can be the same or different. An electrode terminal 122 is provided on one side of each battery cell 121 along the third direction Z for realizing the current input or output of the battery cell 121.

[0086] The connecting component 130 is disposed on one side of the battery cell assembly 120 along the third direction Z. Specifically, in the third direction Z, the connecting component 130 is located on the side of the battery cell 121 where the electrode terminal 122 is located. In the first direction X, at least a part of the connecting component 130 being disposed between the electrode terminals 122 of two adjacent battery cells 121 may mean that the entire connecting component 130 is located between the electrode terminals 122 of the two adjacent battery cells 121, or it may also mean that a part of the connecting component 130 is located between the electrode terminals 122 of the two adjacent battery cells 121, while the other part is located outside the electrode terminals 122 of the two adjacent battery cells 121.

[0087] The connecting component 130 can be used to connect two adjacent battery cells 121 in the first direction X. In addition, the connecting component 130 can also be used to connect other battery cells 121. Exemplarily, a part of the connecting component 130 can be located between the electrode terminals 122 of two adjacent battery cells 121 in the first direction X and connect the two battery cells 121, while the other part can be used to connect two adjacent battery cells 121 in the second direction Y. Alternatively, the connecting component 130 can connect all the battery cells 121 in two adjacent battery cell assemblies 120.

[0088] When connecting multiple battery cells 121 through the connecting component 130, the connecting component 130 is located on one side of the corresponding battery cell 121 along the third direction Z and is connected to the corresponding battery cell 121 on this side. It should be noted that the connection between the connecting component 130 and the battery cell 121 means that the connecting component 130 is connected to the housing of the battery cell 121. There are various ways to connect the connecting component 130 to the battery cell 121. For example, the connecting component 130 can be connected to the battery cell 121 by means of adhesion, welding, etc. The number of the connecting components 130 can be one or multiple. The material of the connecting component 130 can be various. For example, the material of the connecting component 130 can be a single material or a composite material.

[0089] The bus bar 150 can be electrically connected to the electrode terminals 122 of multiple battery cells 121 to achieve series, parallel or series-parallel connection of multiple battery cells 121. To improve the stability and reliability of the bus bar 150, the bus bar 150 is disposed on the insulating member 140 to support and fix the bus bar 150 through the insulating member 140.

[0090] In the above solution, a connecting component 130 is arranged on one side of the battery cell assembly 120 along the third direction Z. In the first direction X, at least a part of the connecting component 130 is located between the electrode terminals 122 of two adjacent battery cells 121, so as to arrange the connecting component 130 by making use of at least the space between the shoulders of two adjacent battery cells 121, and reduce the space occupied by the connecting component 130 in the accommodation cavity of the box body 110. Moreover, the connecting component 130 can at least connect the two adjacent battery cells 121, thereby improving the connection strength between the corresponding battery cells 121 and enhancing the service performance of the battery device 100. In addition, in this application, the connecting component 130 is connected to the insulating part 140, which can improve the structural strength and stability of the connecting component 130, so as to further enhance the connection strength and connection reliability between the corresponding battery cells 121 connected by the connecting component 130 and enhance the service performance of the battery device 100.

[0091] In some embodiments, the connecting component 130 includes a main body part and a first bonding part, and the main body part is adhesively connected to the battery cell 121 through the first bonding part.

[0092] Specifically, the main body part and the first bonding part can be two components made of different materials. Optionally, the strength of the main body part can be greater than that of the first bonding part. Through the main body part, the overall structural strength of the connecting component 130 can be enhanced, which helps to improve the connection strength and reliability of the corresponding battery cells 121 connected by the connecting component 130. In the third direction Z, the main body part is arranged on the side of the first bonding part away from the battery cell 121, that is, the first bonding part is arranged between the main body part and the corresponding battery cell 121.

[0093] In the above solution, the connecting component 130 includes a main body part and a first bonding part, and the main body part is adhesively connected to the battery cell 121 through the first bonding part. Compared with the way of connecting the battery cell 121 by welding or the like for the connecting component 130, the connection difficulty between the connecting component 130 and the battery cell 121 can be reduced.

[0094] Please continue to refer to Figure 6 , in some embodiments, in the third direction Z, at least a part of the insulating part 140 is arranged between the bus bar 150 and the battery cell 121. The insulating part 140 is formed with an exposure hole for exposing the electrode terminal 122, and the bus bar 150 is electrically connected to the electrode terminal 122 through the exposure hole.

[0095] Specifically, at least a part of the insulating member 140 being disposed between the bus bar 150 and the battery cell 121 may mean that the entire insulating member 140 is located between the bus bar 150 and the battery cell 121, or may mean that a part of the insulating member 140 is located between the bus bar 150 and the battery cell 121, and the remaining part is located outside the bus bar 150 and the battery cell 121. The insulating member 140 is formed with an exposed hole that extends along the third direction Z, which can expose the electrode terminal 122 on the battery cell 121. Therefore, the bus bar 150 can be electrically connected to the electrode terminal 122 from the exposed hole.

[0096] In the above solution, at least a part of the insulating member 140 is disposed between the bus bar 150 and the battery cell 121 along the third direction Z. Therefore, the bus bar 150 can be supported and fixed by at least a part of the insulating member 140. On this basis, an exposed hole for exposing the electrode terminal 122 is formed in the insulating member 140, so that the bus bar 150 on the insulating member 140 is directly electrically connected to the electrode terminal 122 through the exposed hole, which helps to simplify the assembly steps of the bus bar 150 and improve the assembly efficiency.

[0097] Please continue to refer to Figure 6 , in some embodiments, a receiving recess 141 is provided on the side of the insulating member 140 facing the battery cell 121, and at least a part of the connecting member 130 is disposed in the receiving recess 141.

[0098] Specifically, in the first direction X, a part of the insulating member 140 may be located between the electrode terminals 122 of two adjacent battery cells 121. A receiving recess 141 may be provided on the side of the insulating member 140 facing the battery cell 121. The receiving recess 141 may be completely located between the electrode terminals 122 of two adjacent battery cells 121 in the first direction X, or a part of the receiving recess 141 may be located between the electrode terminals 122 of two adjacent battery cells 121 in the first direction X, and the other part may be located outside the electrode terminals 122 of the aforementioned two adjacent battery cells 121. The receiving recess 141 can be used to accommodate the entire connecting member 130, or can be used to accommodate a part of the connecting member 130. At this time, the remaining part of the connecting member 130 can be located outside the receiving recess 141.

[0099] It should be noted that the receiving recess 141 may be formed by the insulating member 140 recessing from the side facing the battery cell 121 along the third direction Z away from the battery cell 121. Correspondingly, a convex portion may be formed on the side of the insulating member 140 facing away from the battery cell 121 along the third direction Z protruding away from the battery cell 121, and the convex portion may be provided corresponding to the receiving recess 141.

[0100] In the above solution, by providing a receiving recess 141 on one side of the insulating member 140 facing the battery cell 121, at least a part of the connecting member 130 is disposed in the receiving recess 141. On the one hand, the risk of interference between the connecting member 130 and the insulating member 140 can be reduced. On the other hand, at least a part of the connecting member 130 can be isolated and protected by the insulating member 140, which helps to improve the service reliability and service life of the connecting member 130.

[0101] Optionally, the number of busbars 150 can be multiple. Multiple battery cells 121 can be connected in series, parallel or in a hybrid connection through multiple busbars 150. The multiple busbars 150 can be arranged along the first direction X and the second direction Y. The same busbar 150 can be used to achieve series, parallel or hybrid connection of at least two battery cells 121 within the same battery cell assembly 120. Exemplarily, the busbar 150 can be used to electrically connect the electrode terminals 122 of two adjacent battery cells 121 in the second direction Y.

[0102] Optionally, the insulating member 140 can extend approximately along the second direction Y to support and fix the multiple busbars 150 arranged along the second direction Y.

[0103] Optionally, the same insulating member 140 can be used to support two rows of busbars 150 arranged along the first direction X. Each row of busbars 150 can be composed of multiple busbars 150 arranged along the second direction Y. The two rows of busbars 150 can be respectively used to achieve series, parallel or hybrid connection of the battery cells 121 within two adjacent battery cell assemblies 120. At this time, the insulating member 140 can include a first insulating portion, a second insulating portion and a third insulating portion connected in sequence. The first insulating portion is located on one side of a battery cell assembly 120 along the third direction Z and is used to support and fix the multiple busbars 150 corresponding to the battery cell assembly 120. The third insulating portion can be located on one side of an adjacent another battery cell assembly 120 along the third direction Z and is used to support and fix the multiple busbars 150 corresponding to the adjacent another battery cell assembly 120. The second insulating portion is located between the first insulating portion and the third insulating portion along the first direction X. The second insulating portion is located between the electrode terminals 122 of the battery cells 121 within two adjacent battery cell assemblies 120. A receiving recess 141 as described above can be formed on the side of the second insulating portion facing the battery cell 121.

[0104] In some embodiments, in the third direction Z, the thickness of the connecting member 130 is greater than the thickness of the insulating member 140.

[0105] Specifically, the thickness of the connecting member 130 and the thickness of the insulating member 140 can refer to the minimum thickness of the connecting member 130 and the insulating member 140 in the third direction Z, or can also refer to their average thickness in the third direction Z.

[0106] In the above solution, the thickness of the connecting component 130 in the third direction Z is set to be greater than the thickness of the insulating component 140 in the third direction Z, which can make the connecting component 130 have higher structural strength than the insulating component 140, that is, the connecting component 130 is more resistant to tension than the insulating component 140. By connecting at least two battery cells 121 through the connecting component 130, compared with connecting at least two battery cells 121 through the insulating component 140, the connection strength and reliability between the corresponding battery cells 121 can be further improved, thereby enhancing the performance of the battery device 100.

[0107] In some embodiments, the connecting component 130 includes a main body portion and a second bonding portion, and the main body portion is adhesively connected to the insulating component 140 through the second bonding portion.

[0108] The main body portion and the second bonding portion can be two components made of different materials. Optionally, the strength of the main body portion can be greater than the strength of the second bonding portion. Through the main body portion, the overall structural strength of the connecting component 130 can be enhanced, which helps to improve the connection strength and reliability of the corresponding battery cells 121 connected through the connecting component 130. Optionally, the material of the second bonding portion can be the same as the material of the first bonding portion to reduce the assembly difficulty. In the third direction Z, the second bonding portion is disposed on the side of the main body portion away from the battery cell 121, that is, the second bonding portion is disposed between the main body portion and the insulating component 140.

[0109] In the above solution, the connecting component 130 includes a main body portion and a second bonding portion, and the main body portion is adhesively connected to the insulating component 140 through the second bonding portion. Compared with setting the connecting component 130 to be connected to the insulating component 140 by welding or other means, the connection difficulty between the connecting component 130 and the battery cell 121 can be reduced.

[0110] Please refer to Figure 6 and Figure 7 , in some embodiments, two electrode terminals 122 are provided on one side of the battery cell 121 along the third direction Z, and the two electrode terminals 122 are arranged at intervals along the first direction X. The battery device 100 further includes a heat exchange plate 160, and the heat exchange plate 160 is disposed on one side of the battery cell 121 along the third direction Z, and at least a part of the heat exchange plate 160 is located between the two electrode terminals 122 of the battery cell 121. The heat exchange plate 160 is used for heat exchange with the battery cell 121.

[0111] Specifically, both electrode terminals 122 are disposed on one side of the battery cell 121 along the third direction Z. The two electrode terminals 122 are arranged at intervals along the first direction X, and a certain interval space is formed therebetween. The heat exchange plate 160 is used to exchange heat with the battery cell 121. The heat exchange plate 160 can form a heat exchange channel for accommodating a heat exchange medium, and heat can be exchanged with the battery cell 121 by means of the heat exchange medium, reducing the risk of thermal failure of the battery cell 121.

[0112] In the third direction Z, the heat exchange plate 160 is disposed on the side of the battery cell 121 where the electrode terminals 122 are provided. That at least a part of the heat exchange plate 160 is located between the two electrode terminals 122 of the battery cell 121 may mean that the entire heat exchange plate 160 is located between the two aforementioned electrode terminals 122, or may mean that a part of the heat exchange plate 160 is located between the two aforementioned electrode terminals 122, and the remaining part is located outside the two aforementioned electrode terminals 122.

[0113] In the above solution, by disposing the heat exchange plate 160 on one side of the battery cell 121 along the third direction Z and exchanging heat between the heat exchange plate 160 and the battery cell 121, the risk of thermal failure of the battery cell 121 can be reduced. On this basis, at least a part of the heat exchange plate 160 is disposed between the two electrode terminals 122 of the battery cell 121, so as to utilize the space between the two aforementioned electrode terminals 122 to dispose the heat exchange plate 160, which helps to improve the space utilization rate within the battery device 100.

[0114] Optionally, the heat exchange plate 160 can be connected to the corresponding battery cell 121 to improve its stability. For example, the heat exchange plate 160 can be adhesively connected to the corresponding battery cell 121. At this time, the heat exchange plate 160 can also bear the acting force generated by the battery cell 121 during the cyclic expansion process to a certain extent.

[0115] Optionally, the heat exchange plate 160 can extend approximately along the second direction Y, and the heat exchange plate 160 can exchange heat with multiple battery cells 121 within the same battery cell assembly 120 to improve the heat exchange efficiency.

[0116] Optionally, the heat exchange plate 160 can be connected to the box body 110 to improve its stability. Exemplarily, both ends of the heat exchange plate 160 along the second direction Y can be respectively connected to the box body 110.

[0117] Optionally, the battery cell 121 may further be provided with a pressure relief mechanism 170. The pressure relief mechanism 170 is located on one side of the battery cell 121 along the third direction Z. In the first direction X, the pressure relief mechanism 170 may be located between the two electrode terminals 122 of the battery cell 121. In a plane perpendicular to the third direction Z, the projection of the pressure relief mechanism 170 in the third direction Z may overlap with the projection of the heat exchange plate 160 in the third direction Z, which can improve the heat exchange effect between the heat exchange plate 160 and the battery cell 121.

[0118] Please continue to refer to Figure 6 and Figure 7 , in some embodiments, the insulating member 140 is provided with flanging portions 142 at both ends along the first direction X, and the flanging portions 142 are connected to the heat exchange plate 160.

[0119] In the first direction X, both ends of the insulating member 140 are located on the side where the electrode terminals 122 of two adjacent battery cells 121 are far away from each other, that is, any one end of the insulating member 140 in the first direction X is located between the two electrode terminals 122 of the corresponding battery cell 121. The insulating member 140 is provided with flanging portions 142 at both ends along the first direction X, and the flanging portions 142 are located between the two electrode terminals 122 of the corresponding battery cell 121 to be connected to the corresponding heat exchange plate 160. There are various ways to connect the flanging portion 142 to the heat exchange plate 160. For example, the flanging portion 142 may be adhesively connected to the heat exchange plate 160.

[0120] In the above solution, setting the flanging portion 142 to be connected to the heat exchange plate 160 helps to improve the structural stability of the insulating member 140 and the heat exchange plate 160, and also makes the structures of components such as the heat exchange plate 160 and the insulating member 140 more compact.

[0121] Optionally, the flanging portion 142 may protrude away from the battery cell 121 relative to other parts of the insulating member 140, which can increase the connection area between the flanging portion 142 and the heat exchange plate 160 and improve the connection reliability between the two.

[0122] Please continue to refer to Figure 7 , in some embodiments, the flanging portion 142 includes a first sub - portion 1421 and a second sub - portion 1422 connected to the first sub - portion 1421. The first sub - portion 1421 is arranged between the bus bar 150 and the heat exchange plate 160 along the first direction X, and the second sub - portion 1422 is arranged on the side of the heat exchange plate 160 away from the battery cell 121 along the third direction Z.

[0123] In the flanging portion 142, the first sub-portion 1421 is connected to the other parts of the insulating member 140 and is bent relative to the other parts of the insulating member 140 so as to stand vertically between the bus bar 150 and the heat exchange plate 160 along the first direction X. The second sub-portion 1422 may be connected to one end of the first sub-portion 1421 away from the other parts of the insulating member 140, and the second sub-portion 1422 may be bent relative to the first sub-portion 1421 so as to cover the side of the heat exchange plate 160 away from the battery cell 121 along the third direction Z.

[0124] At least one of the first sub-portion 1421 and the second sub-portion 1422 may be connected to the heat exchange plate 160. Specifically, the first sub-portion 1421 may be connected to the heat exchange plate 160 while the second sub-portion 1422 is separated from the heat exchange plate 160. Or, the second sub-portion 1422 may be connected to the heat exchange plate 160 while the first sub-portion 1421 is separated from the heat exchange plate 160. Or, the first sub-portion 1421 and the second sub-portion 1422 may be simultaneously connected to the heat exchange plate 160 to improve the connection reliability between the flanging portion 142 and the heat exchange plate 160.

[0125] In the above solution, the flanging portion 142 is provided with a first sub-portion 1421 and a second sub-portion 1422 connected to the first sub-portion 1421. The first sub-portion 1421 is disposed between the bus bar 150 and the heat exchange plate 160 along the first direction X, and the second sub-portion 1422 is disposed on the side of the heat exchange plate 160 away from the battery cell 121 along the third direction Z. Through the first sub-portion 1421 and the second sub-portion 1422, the heat exchange plate 160 and the bus bar 150 can be better isolated, reducing the risk of interference between the two.

[0126] Please continue to refer to Figure 4 , in some embodiments, the connecting member 130 extends along the second direction Y, and the connecting member 130 connects each battery cell 121 in two adjacent battery cell assemblies 120.

[0127] In the above solution, the connecting member 130 connects each battery cell 121 in two adjacent battery cell assemblies 120. That is to say, the connecting member 130 can not only connect two adjacent battery cells 121 along the first direction X, but also connect a plurality of battery cells 121 arranged in the second direction Y, which helps to improve the integrity and stability of the two adjacent battery cell assemblies 120 and further enhance the performance of the battery device 100.

[0128] Please continue to refer to Figure 4 , in some embodiments, the number of the connecting members 130 is multiple, and the multiple connecting members 130 are arranged at intervals along the first direction X, and each connecting member 130 connects each battery cell 121 in the corresponding two adjacent battery cell assemblies 120.

[0129] The number of the connecting components 130 can be determined according to the number of the battery cell assemblies 120 in the battery device 100. Exemplarily, there are four battery cell assemblies 120 in the battery device 100. At this time, the number of the connecting components 130 can be three. Among the four battery cell assemblies 120, the battery cells 121 in any two adjacent battery cell assemblies 120 can be connected by the same connecting component 130.

[0130] In the above solution, the battery cells 121 in multiple battery cell assemblies 120 are connected by multiple connecting components 130, which helps to improve the integrity and stability of each battery cell assembly 120 and further improve the performance of the battery device 100.

[0131] Please refer to Figure 8 , in some embodiments, the box body 110 includes a box main body 113 and a bottom plate 114. The box main body 113 has an opening on one side along the third direction Z. The bottom plate 114 covers the opening and encloses a receiving cavity with the box main body 113. In the third direction Z, the connecting component 130 is located on the side of the battery cell assembly 120 facing the bottom plate 114.

[0132] Specifically, in the third direction Z, the connecting component 130 is located on the side of the battery cell assembly 120 facing the bottom plate 114. Correspondingly, among the battery cell assemblies 120, components such as the electrode terminals 122, the insulating parts 140, the bus bars 150, the heat exchange plates 160, and the pressure relief mechanisms 170 are all located on the side of the battery cells 121 facing the bottom plate 114 along the third direction Z. Therefore, when a thermal failure occurs inside the battery cell 121, the high-temperature and high-pressure substances inside it can be discharged towards the bottom plate 114, that is, discharged downward, thereby reducing the risk of damage to the operator and other structures of the electrical device caused by the high-temperature and high-pressure substances.

[0133] In a second aspect, an embodiment of the present application further provides an electrical device, including the above battery device 100. The electrical device provided by the embodiment of the present application has the technical effects of the technical solutions of the battery device 100 in any of the above embodiments. The same or corresponding structures and the explanations of terms are not repeated here.

[0134] An embodiment of the present application provides a battery device 100, including a box body 110, a plurality of battery cell assemblies 120, and a connecting component 130. The box body 110 forms a receiving cavity; the plurality of battery cell assemblies 120 are arranged in the receiving cavity and arranged along a first direction X. Each battery cell assembly 120 includes a plurality of battery cells 121 arranged along a second direction Y. An electrode terminal 122 is provided on one side of each battery cell 121 along a third direction Z. The first direction X, the second direction Y, and the third direction Z are perpendicular to each other; the connecting component 130 is arranged on one side of the battery cell assembly 120 along the third direction Z. In the first direction X, at least part of the connecting component 130 is arranged between the electrode terminals 122 of two adjacent battery cells 121 and is connected to the two adjacent battery cells 121. The connecting component 130 includes a main body portion and a first bonding portion. The main body portion is adhesively connected to the battery cell 121 through the first bonding portion. The battery device 100 further includes an insulating member 140 and a bus bar 150 arranged on the insulating member 140. The bus bar 150 is connected to the electrode terminal 122; the connecting component 130 is connected to the insulating member 140. A receiving recess 141 is provided on one side of the insulating member 140 facing the battery cell 121. At least part of the connecting component 130 is arranged in the receiving recess 141. Two electrode terminals 122 are provided on one side of the battery cell 121 along the third direction Z. The two electrode terminals 122 are arranged at intervals along the first direction X. The battery device 100 further includes a heat exchange plate 160. The heat exchange plate 160 is arranged on one side of the battery cell 121 along the third direction Z, and at least part of the heat exchange plate 160 is located between the two electrode terminals 122 of the battery cell 121. The heat exchange plate 160 is used for heat exchange with the battery cell 121.

[0135] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some or all of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application, and they should all be covered by the scope of the claims and the description of the present application. In particular, as long as there is no structural conflict, the technical features mentioned in each embodiment can be combined in any way. The present application is not limited to the specific embodiments disclosed in the text, but includes all technical solutions falling within the scope of the claims.

Claims

1. A battery device, characterized in that: include: A box body is formed with a receiving cavity; A plurality of battery cell assemblies are disposed in the accommodating cavity and arranged along a first direction, each of the battery cell assemblies comprises a plurality of battery cells arranged along a second direction, and each of the battery cells is provided with an electrode terminal on one side along a third direction, and the first direction, the second direction and the third direction are perpendicular to each other; A connecting component is disposed on one side of the battery cell assembly along the third direction, wherein at least a portion of the connecting component is disposed between electrode terminals of two adjacent battery cells and connected to the two adjacent battery cells in the first direction; an insulating member connected to the connecting member; A bus bar is disposed on the insulating member, and the bus bar is connected to the electrode terminal.

2. The battery device according to claim 1, characterized in that: The connecting component includes a main body and a first bonding portion, and the main body is bonded and connected to the battery cell via the first bonding portion.

3. The battery device according to claim 1, characterized in that: In the third direction, at least a portion of the insulating member is disposed between the busbar and the battery cell, the insulating member is formed with an exposure hole for exposing the electrode terminal, and the busbar is electrically connected to the electrode terminal through the exposure hole.

4. The battery device according to claim 1, characterized in that: A receiving recess is provided on a side of the insulating member facing the battery cell, and at least a portion of the connecting component is disposed in the receiving recess.

5. The battery device according to claim 4, characterized in that: In the third direction, the thickness of the connecting member is greater than the thickness of the insulating member.

6. The battery device according to claim 1, characterized in that: The connecting component includes a main body and a second adhesive portion, and the main body is adhesively connected to the insulating member through the second adhesive portion.

7. The battery device according to claim 1, characterized in that: The battery cell is provided with two electrode terminals on one side along the third direction, and the two electrode terminals are arranged at intervals along the first direction. The battery device further includes a heat exchange plate, which is disposed on one side of the battery cell along the third direction, and at least part of the heat exchange plate is located between the two electrode terminals of the battery cell, and is used for exchanging heat with the battery cell.

8. The battery device according to claim 7, characterized in that: The insulating member is provided with flanged portions at both ends along the first direction, and the flanged portions are connected to the heat exchange plate.

9. The battery device according to claim 8, characterized in that: The flange portion includes a first sub-portion and a second sub-portion connected to the first sub-portion, the first sub-portion is arranged between the bus bar and the heat exchange plate along the first direction, and the second sub-portion is arranged on a side of the heat exchange plate away from the battery cell along the third direction.

10. The battery device according to any one of claims 1 to 9, characterized in that: The connecting component extends along the second direction, and the connecting component connects the battery cells in two adjacent battery cell assemblies.

11. The battery device according to claim 10, characterized in that: There are a plurality of the connecting components, and the plurality of the connecting components are arranged at intervals along the first direction, and each of the connecting components connects the battery cells in two corresponding adjacent battery cell assemblies.

12. The battery device according to any one of claims 1 to 9, characterized in that: The box body comprises a box body and a bottom plate, the box body has an opening on one side along the third direction, the bottom plate covers the opening and is enclosed with the box body to form the accommodating cavity, In the third direction, the connecting component is located on a side of the battery cell assembly facing the bottom plate.

13. An electrical device, characterized in that: A battery device comprising any one of claims 1-12.

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