Battery device and energy storage device

Abstract

The utility model provides a battery device and an energy storage device, the battery device comprises a plurality of single batteries, an insulating part and a confluence part, and one side of each single battery along a first direction is provided with an electrode terminal; the insulating part comprises an insulating main body, a first limiting part and a second limiting part, the insulating main body is positioned on one side of the plurality of single batteries along the first direction, and the first limiting part and the second limiting part protrude out of one side of the insulating main body far away from the single batteries along the first direction; the second limiting part and the confluence part are arranged along the second direction to limit the rotation amplitude of the confluence part around the first limiting part, so that on one hand, the stability of the confluence part can be improved, and the connection reliability of the confluence part and the electrode terminal is improved; and on the other hand, the second limiting part and the corresponding insulating main body occupy less space on one side, close to the electrode terminal, of the confluence component along the first direction, and even do not need to occupy corresponding space, so that the connection area of the electrode terminal and the confluence component is increased, and the connection reliability of the electrode terminal and the confluence component is further improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of battery, in particular to a battery device and an energy storage device. BACKGROUND

[0002] In recent years, power batteries have made great progress. Power batteries can be widely applied to energy storage power supply systems such as hydroelectric, thermal, wind and solar power stations, and multiple fields such as electric vehicles, electric tools, military equipment and aerospace.

[0003] However, the reliability of the power battery still needs to be improved. CONTENT OF THE INVENTION

[0004] In view of the above problems, the present application provides a battery device and an energy storage device, which can improve the reliability of the battery device.

[0005] In a first aspect, the embodiments of the present application provide a battery device, comprising a battery box, a plurality of battery monomers, an insulating piece and a busbar component, the battery box is formed with an accommodating cavity, the plurality of battery monomers are arranged in the accommodating cavity, and the battery monomers are provided with electrode terminals on one side along a first direction; the insulating piece is arranged in the accommodating cavity, the insulating piece comprises an insulating body, a first limiting part and a second limiting part, the insulating body is located on one side of the plurality of battery monomers along the first direction, the first limiting part and the second limiting part protrude from one side of the insulating body away from the battery monomers along the first direction, the first limiting part comprises a first part and a second part, and the second part is arranged on one side of the first part away from the insulating body along the first direction; the busbar component is connected to the electrode terminals, at least part of the busbar component is located on one side of the insulating body away from the battery monomers along the first direction, the busbar component is provided with a through hole, the first part of the first limiting part is accommodated in the through hole, in the first direction, part of the busbar component is located between the second part of the first limiting part and the insulating body, the second limiting part is arranged along a second direction with the busbar component, and the first direction and the second direction intersect with each other.

[0006] In the above scheme, the first limiting portion protrudes from the side of the insulating body away from the battery monomer in the first direction, and includes a first part and a second part arranged on the side of the first part away from the insulating body in the first direction, at least part of the busbar component is located on the side of the insulating body away from the battery monomer in the first direction, the first part of the first limiting portion is accommodated in the through hole of the busbar component, and in the first direction, part of the busbar component is located between the second part of the first limiting portion and the insulating body, so that the busbar component can be pressed against the insulating body in the first direction by the first limiting portion, and the busbar component can be limited in the first direction and other directions perpendicular to the first direction. On this basis, by arranging the second limiting portion to protrude from the side of the insulating body away from the battery monomer in the first direction, and arranging the second limiting portion and the busbar component in the second direction to limit the amplitude of rotation of the busbar component around the first limiting portion, on the one hand, the stability of the busbar component can be improved, and the connection reliability of the busbar component and the electrode terminal can be improved, on the other hand, the second limiting portion and part of the insulating body for supporting the second limiting portion occupy less space on the side of the busbar component close to the electrode terminal in the first direction, or even do not occupy the corresponding space, thus helping to increase the connection area of the electrode terminal and the busbar component, further improving the connection reliability of the busbar component and the electrode terminal, and further improving the reliability of the battery device.

[0007] In some embodiments, the second limiting portion includes a limiting plate and a buckle, the limiting plate is connected with the insulating body and arranged in the second direction with the busbar component, and the buckle is arranged on the limiting plate and spaced apart from the insulating body in the first direction; the battery device further includes a wire harness arranged on the insulating body, and at least part of the wire harness is located between the insulating body and the buckle in the first direction.

[0008] In the above scheme, the limiting plate is arranged in the second direction with the busbar component, so that the busbar component can be limited by the limiting plate, reducing the risk of rotation of the busbar component around the part of the first limiting portion accommodated in the through hole. On this basis, by arranging the buckle on the limiting plate, the buckle is spaced apart from the insulating body in the first direction, so that the at least part of the wire harness arranged on the insulating body can be limited in the first direction by the buckle, and the stability and reliability of the wire harness can be improved.

[0009] In some embodiments, the insulating body includes a body portion arranged in the second direction and a support plate, the busbar component is located on one side of the support plate in the first direction, and the second limiting portion is located between the body portion and the support plate.

[0010] In the above scheme, the body part and the support plate of the insulating body are arranged along the second direction, and the second limiting part is arranged between the body part and the support plate, so that the structure of the insulating body and the second limiting part is more compact, and the risk of position interference between the second limiting part and other structures in the battery device is reduced.

[0011] In some embodiments, a plurality of battery monomers are arranged along a third direction, and a plurality of support plates and a plurality of busbar components are provided, and the plurality of support plates and the plurality of busbar components are arranged along the third direction, in the third direction, the two ends of the busbar component exceed the support plate, and are respectively connected with the electrode terminals of the two battery monomers, and the third direction intersects the first direction and the second direction respectively.

[0012] In the above scheme, the plurality of support plates are arranged along the third direction, at this time, the plurality of support plates can support the plurality of busbar components, improve the stability of each busbar component, and at the same time, the interval between the adjacent two support plates can be used to set other structures of the battery device, so that the structure of the battery device is more compact. On this basis, the two ends of the busbar component along the third direction exceed the support plate along the third direction, and the two parts exceeding the support plate can be respectively connected with the electrode terminals of the two battery monomers, so as to realize the series or parallel connection of the two battery monomers.

[0013] In some embodiments, in the third direction, at least part of the support plates are located between the electrode terminals of the adjacent two battery monomers.

[0014] In the above scheme, at least part of the support plates are arranged in the interval space between the electrode terminals of the adjacent two battery monomers along the third direction, which can reasonably utilize the interval space, so that the structure of the insulating part and the battery monomer is more compact. And at this time, the two parts of the busbar component protruding relative to the support plate can be respectively attached to the corresponding electrode terminals along the first direction, which helps to realize the connection of the busbar component and the corresponding electrode terminal.

[0015] In some embodiments, the second limiting part is provided with a wire passing channel, the wire passing channel communicates the two sides of the second limiting part along the second direction, and the wire passing channel is used for the wire harness to pass through.

[0016] In the above scheme, on the basis of arranging the second limiting part between the body part and the support plate, the second limiting part is further provided with a wire passing channel, so that the wire passing channel communicates the two sides of the second limiting part along the second direction. In the assembly process of the battery device, the wire harness can directly extend to one side of the support plate along the first direction from the body part through the wire passing channel, and is connected with the busbar component located on the support plate, without passing through the second limiting part. On the one hand, it 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 cost.

[0017] In some embodiments, in the first direction, the projection of the through hole on the insulating body is located between the projections of the electrode terminals of the two adjacent battery monomers on the insulating body.

[0018] In the above scheme, the projection of the through hole on the insulating body in the first direction is located between the projections of the electrode terminals of the two adjacent battery monomers on the insulating body, that is, the through hole is arranged corresponding to the interval region between the two adjacent electrode terminals, and the through hole is arranged staggered with the electrode terminals. Compared with the arrangement that the projection of the through hole on the insulating body in the first direction overlaps with the projection of the electrode terminals on the insulating body in the first direction, on the one hand, it can reduce the possibility that the through hole occupies the space in the busbar component for connecting with the electrode terminals, increase the connection area of the busbar component and the electrode terminals, and reduce the connection resistance between the busbar component and the electrode terminals, which is conducive to improving the current transmission capacity between the electrode terminals and the busbar component and reducing the energy loss therebetween. On the other hand, it can reduce the risk of interference between the first limiting portion cooperating with the through hole and the electrode terminals.

[0019] In some embodiments, the plurality of battery monomers are arranged in the third direction, and the distance of the through hole to the electrode terminals of the two adjacent battery monomers in the third direction is the same.

[0020] In the above scheme, the distance of the through hole to the electrode terminals of the two adjacent battery monomers in the third direction is the same, so that the through hole is approximately located at the center position between the electrode terminals of the two adjacent battery monomers, that is, approximately located at the center position of the busbar component in the third direction, which helps to improve the uniformity of stress distribution on the busbar component. Moreover, when the through hole is approximately located at the center position between the electrode terminals of the two adjacent battery monomers, the first limiting portion for cooperating with the through hole is also approximately located at the center position between the electrode terminals of the two adjacent battery monomers, that is, the connection point of the insulating piece and the busbar component is approximately located at the center position between the electrode terminals of the two adjacent battery monomers, which can improve the support stability of the insulating piece to the busbar component.

[0021] In some embodiments, 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 the two adjacent battery monomers on the insulating body, and the plurality of through holes are arranged spaced apart in the second direction.

[0022] In the above scheme, by arranging a plurality of through holes in the region between the electrode terminals of the two adjacent battery monomers in the busbar component, the plurality of through holes are distributed spaced apart in the second direction, which can further lock the busbar component by cooperating the plurality of through holes with the first limiting portion without occupying the space in the busbar component for connecting with the electrode terminals, thereby further improving the stability of the busbar component.

[0023] In some embodiments, at least one of the first limiting part and the second limiting part is an integral structure with the insulating body.

[0024] In the above scheme, by setting at least one of the first limiting part and the second limiting part as an integral structure with the insulating body, the connection reliability of at least one of the first limiting part and the second limiting part with the insulating body can be improved, the stability of the busbar component can be improved, and the assembly time of at least one of the first limiting part and the second limiting part with the insulating body can be saved, and the assembly efficiency of the battery device can be improved.

[0025] In some embodiments, the busbar component includes a first busbar, a second busbar, and a buffer part, the first busbar and the second busbar are respectively electrically connected with electrode terminals of two battery monomers, and the buffer part is arranged between the first busbar and the second busbar, and the through hole is arranged on the first busbar.

[0026] In the above scheme, the first busbar and the second busbar are respectively electrically connected with electrode terminals of two battery monomers, realizing series connection or parallel connection of the two battery monomers. The buffer part arranged between the first busbar and the second busbar can absorb the corresponding expansion force and deform when the battery monomers swell and bulge, so as to buffer the relative position change between the electrode terminals of the two battery monomers, reduce the risk of disconnection of the busbar component from the electrode terminals during the expansion process of the battery monomers, and improve the connection reliability of the busbar component and the electrode terminals. In addition, by arranging the through hole on the first busbar, compared with arranging the through hole on the buffer part, the influence of the deformation of the buffer part on the connection effect of the first limiting part and the through hole can be reduced, and the connection reliability of the first limiting part and the busbar component can be improved.

[0027] In some embodiments, the insulating part is symmetrically arranged along the center line of the insulating part in the width direction of the insulating part.

[0028] In the above scheme, the insulating part is symmetrically arranged along the center line of the insulating part in the width direction of the insulating part, which helps to improve the universality of the insulating part and reduce the mold opening cost of the insulating part.

[0029] In some embodiments, the insulating body and the busbar component are riveted through the first limiting part.

[0030] In the above scheme, the insulating body and the busbar component are riveted through the first limiting part, which can improve the connection reliability and reduce the connection difficulty.

[0031] The second aspect of the embodiments of the present application provides a energy storage device, including the battery device of any one of the above.

[0032] The above description is only a summary of the technical solutions of the present application. In order to make the technical means of the present application more clear and understandable, and to make the above and other purposes, characteristics and advantages of the present application more obvious and easy to understand, the following will give a specific embodiment of the present application. BRIEF DESCRIPTION OF DRAWINGS

[0033] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments of the present application. Obviously, the drawings described below are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings.

[0034] Figure 1 is a structural schematic diagram of a vehicle provided by some embodiments of the present application;

[0035] Figure 2 is an exploded view of a battery device provided by some embodiments of the present application;

[0036] Figure 3 is a structural schematic diagram of the connection between a battery monomer and a busbar component in the battery device provided by some embodiments of the present application;

[0037] Figure 4 is a structural schematic diagram of the connection between an insulating piece and a busbar component in the battery device provided by some embodiments of the present application;

[0038] Figure 5 is a partial enlarged view of AA in Figure 4

[0039] Figure 6 is a side view of the connection between the insulating piece and the busbar component in the battery device provided by some embodiments of the present application;

[0040] Figure 7 is a partial enlarged view of BB in Figure 6

[0041] Figure 8 is a top view of the connection between the insulating piece and the busbar component in the battery device provided by some embodiments of the present application;

[0042] Figure 9 is a partial enlarged view of the connection between the insulating piece and the busbar component in the battery device provided by some embodiments of the present application;

[0043] Figure 10 is a structural schematic diagram of a busbar component in the battery device provided by some embodiments of the present application.

[0044] Label name:

[0045] ​​Vehicle 1000; battery device 100; controller 200; motor 300

[0046] Battery cell 110; electrode terminal 111; first case 120; second case 130

[0047] Insulating member 140; insulating body 141; body portion 1411; support plate 1412; first stop portion 142; second stop portion 143; stop plate 1431; buckle 1432; wire passage 1433; wire hole 1434; notch 1435; bus member 150; through hole 151; first bus portion 152; second bus portion 153; buffer portion 154; wire harness 160; first direction X; second direction Y; third direction Z. DETAILED DESCRIPTION

[0048] The embodiments of the technical solutions of the present application will be described in detail below with reference to the drawings. The following embodiments are only used to more clearly illustrate the technical solutions of the present application, and therefore only serve as examples, and cannot limit the protection scope of the present application.

[0049] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the present application; the terms "include" and "have" and any variations thereof used in the specification and claims of the present application and the above description of drawings are intended to cover the non-exclusive inclusion.

[0050] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "a plurality of" is two or more, unless otherwise explicitly and specifically limited.

[0051] Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the present application. The appearance of the phrase in various places in the specification does not necessarily all refer to the same embodiment, nor is it necessarily mutually exclusive or alternative to other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0052] If not specifically stated, all embodiments and optional embodiments of the present application can be combined to form new technical solutions.

[0053] If not specifically stated, all technical features and optional technical features of the present application can be combined to form new technical solutions.

[0054] If there is no special indication, all steps of the present application can be carried out in sequence, or randomly, preferably in sequence. For example, the method comprises steps (a) and (b), which means that the method can comprise steps (a) and (b) in sequence, or steps (b) and (a) in sequence. For example, it is mentioned that the method can further comprise step (c), which means that step (c) can be added to the method in any order, for example, the method can comprise steps (a), (b) and (c), or steps (a), (c) and (b), or steps (c), (a) and (b), etc.

[0055] In the description of the embodiments of the present application, the term "and / or" is only to describe the association relationship of the associated objects, which means that there can be three relationships, for example, A and / or B, which can mean that there are three cases of A alone, A and B together, and B alone. In addition, the character " / " in this paper generally represents that the front and rear associated objects are in an "or" relationship.

[0056] In the description of the embodiments of the present application, the term "a plurality of" means two or more (including two), and similarly, "a plurality of groups" means two or more groups (including two groups), and "a plurality of pieces" means two or more pieces (including two pieces).

[0057] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the embodiments of the present application.

[0058] In the description of the embodiments of the present application, unless otherwise specifically specified and limited, the technical terms "mounting", "connecting", "connecting", "fixing" and the like should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication or interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0059] The battery device mentioned in the embodiments of the present application can include one or more battery cell assemblies for providing voltage and capacity. The battery cell assembly can include a plurality of battery cells connected in series, in parallel, or in a mixed connection through a busbar component.

[0060] In some embodiments, the 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 charging and discharging of the battery cell, active ions (e.g., lithium ions) are inserted and extracted between the positive electrode and the negative electrode. The separator disposed between the positive electrode and the negative electrode can prevent the positive and negative electrodes from shorting while allowing the active ions to pass through.

[0061] In some embodiments, the battery cell can include a housing. The housing can be a steel shell, an aluminum shell, a plastic shell (e.g., polypropylene), a composite metal shell (e.g., 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.

[0062] As an example, when the housing is a non-sealed structure, the housing serves to protect the electrode assembly, and a sealing bag is further included between the housing and the electrode assembly for encapsulating the electrode assembly and the electrolyte. Specifically, the sealing bag can be a bag-shaped insulating member or an aluminum-plastic film. When the housing is a sealed structure, the housing is used to encapsulate the electrode assembly and the electrolyte, etc.

[0063] As an example, the battery cell can be a cylindrical battery cell, a prismatic battery cell, a soft-pack battery cell, or other shapes of battery cells, and the prismatic battery cell includes a square battery cell, a blade battery cell, a multi-prismatic battery cell (e.g., a hexagonal battery cell), etc., without specific limitation in the present application.

[0064] The housing of the battery cell generally has an electrode terminal for realizing the input or output of current. The battery device generally has a busbar component for connecting with the electrode terminal, and the busbar component is used to realize the series, parallel, or mixed connection of the plurality of battery cells. In addition, in order to improve the stability and reliability of the busbar component, the battery device generally further has an insulating member, and at least part of the insulating member is disposed between the battery cell and the busbar component for supporting and fixing the busbar component.

[0065] The busbar component and the insulating member are usually fixedly connected by hot riveting. For example, a hot riveting column can be arranged on the insulating body of the insulating member, a part of the hot riveting column penetrates the busbar component, and then a device such as a hot riveting machine or a hot riveting gun is used to apply pressure to the hot riveting column, so that the hot riveting column is plastically deformed, thereby realizing the connection of the busbar component and the insulating member. The foregoing connection mode usually needs to arrange multiple hot riveting columns around the electrode terminal in the circumferential direction, and the multiple hot riveting columns are connected with the busbar component respectively. Otherwise, the busbar component may rotate around the hot riveting column in the subsequent use process, affecting the stability of the busbar component, and further affecting the connection reliability of the busbar component and the electrode terminal. However, a large number of hot riveting columns and part of the insulating body for supporting the hot riveting columns usually need to occupy a large space on the side of the busbar component close to the electrode terminal, thereby limiting the connection area of the busbar component and the electrode terminal, and affecting the connection reliability of the busbar component and the electrode terminal.

[0066] In view of this, the battery device provided by the embodiments of the present application comprises a battery box, a plurality of battery monomers, an insulating member and a busbar component. The battery box is formed with a receiving cavity, the plurality of battery monomers are arranged in the receiving cavity, and the battery monomers are provided with electrode terminals on one side along a first direction. The insulating member is arranged in the receiving cavity, and comprises an insulating body, a first limiting part and a second limiting part. The insulating body is located on one side of the plurality of battery monomers along the first direction, the first limiting part and the second limiting part protrude from one side of the insulating body away from the battery monomers along the first direction, the first limiting part comprises a first part and a second part, and the second part is arranged on one side of the first part away from the insulating body along the first direction. The busbar component is connected to the electrode terminals, at least part of the busbar component is located on one side of the insulating body away from the battery monomers along the first direction, the busbar component is provided with a through hole, the first part of the first limiting part is accommodated in the through hole, in the first direction, part of the busbar component is located between the second part of the first limiting part and the insulating body, and the second limiting part is arranged with the busbar component along a second direction. The first direction and the second direction intersect with each other. By pressing the busbar component to the insulating body along the first direction through the first limiting part, the busbar component can be limited along the first direction and other directions perpendicular to the first direction. On this basis, the second limiting part is arranged with the busbar component along the second direction to limit the amplitude of the rotation of the busbar component around the first limiting part. On the one hand, the stability of the busbar component can be improved, and the connection reliability of the busbar component and the electrode terminals can be improved. On the other hand, the second limiting part and part of the insulating body for supporting the second limiting part occupy a smaller space on one side of the busbar component close to the electrode terminals along the first direction, or even do not need to occupy the corresponding space, thereby helping to increase the connection area of the electrode terminals and the busbar component, further improving the connection reliability of the busbar component and the electrode terminals, and further improving the reliability of the battery device.

[0067] The technical solutions described in the embodiments of the present application are applicable to various energy storage devices using battery devices. The energy storage device includes one or more battery clusters to improve the voltage and capacity of the energy storage device. The battery cluster can include a plurality of battery devices connected in series through a busbar component to improve the voltage of the energy storage device. When the energy storage device includes a plurality of battery clusters, the plurality of battery clusters are connected in parallel to improve the capacity of the energy storage device.

[0068] The energy storage device can be used in energy storage power stations, wind power systems, solar power systems, mobile power systems, or temporary power supply systems, etc. The energy storage device can store electrical energy as needed and output electrical energy at an appropriate time. For example, the energy storage device can store electrical energy during the off-peak period of electricity consumption, and provide electrical energy for related users or electrical equipment during the peak period of electricity consumption. The energy storage system provided in the embodiments of the present application can be any power system that needs to use an energy storage device.

[0069] In some embodiments, the energy storage device is an energy storage container or an energy storage cabinet.

[0070] In some embodiments, the energy storage device can include a cabinet body and one or more battery clusters, and the battery clusters are contained in the cabinet body.

[0071] In some embodiments, the energy storage device can include a thermal management module, a master control module, a general control module, a power distribution module, and a fire-fighting module, etc.

[0072] As an example, the thermal management module can include a liquid cooling unit that provides cooling liquid for adjusting the temperature of the battery monomer to each battery device through a pipeline.

[0073] As an example, the master control module can serve as a battery management unit of the battery cluster, for monitoring and managing the battery cluster. The master control module can monitor the current, voltage, power, or temperature, etc. of the battery cluster. For example, the charging and discharging current, voltage, etc. of the battery cluster can be controlled. The master control module includes an auxiliary battery management unit, a fuse module, etc.

[0074] As an example, the general control module can serve as a battery management unit of the energy storage device, for monitoring and managing the energy storage device. The general control module can monitor the current, voltage, power, state of charge, or temperature, etc. of the energy storage device. For example, the charging and discharging current, voltage, etc. of the energy storage device can be controlled. As an example, the general control module includes an insulation monitoring module, a main battery management unit, and a fiber optic conversion module, etc.

[0075] As an example, the fire-fighting system includes a control panel, a detector, an alarm device, etc., for detecting, alarming, or extinguishing the energy storage system.

[0076] As an example, the power distribution device can be used for power distribution to the power consumption module of the energy storage device.

[0077] The technical solutions described in the embodiments of the present application are also applicable to various power consumption devices using the battery device, for example, mobile phones, portable devices, notebook computers, electric vehicles, electric toys, electric tools, vehicles, ships and spacecraft, etc., for example, the spacecraft includes airplanes, rockets, space shuttles and spaceships, etc.

[0078] The battery device described in the embodiments of the present application is not only limited to the power consumption devices described above, but for the sake of brevity, the following embodiments are described taking electric vehicles as an example.

[0079] Please refer to Figure 1 , Figure 1 A simple schematic diagram of a vehicle 1000 is provided in the embodiments of the present application. The vehicle 1000 can be a fuel vehicle, a gas vehicle or a new energy vehicle, and the new energy vehicle can be a pure electric vehicle, a hybrid vehicle or an extended range vehicle, etc. The vehicle 1000 can be provided with a battery device 100 inside, for example, the battery device 100 can be arranged at the bottom, the front or the rear of the vehicle 1000. The battery device 100 can be used for power supply of the vehicle 1000, for example, the battery device 100 can be used as the operating power supply of the vehicle 1000. The vehicle 1000 can also include a controller 200 and a motor 300, and the controller 200 is used to control the power supply of the motor 300 by the battery. 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 run, instead of or partially instead of fuel or natural gas to provide driving for the vehicle 1000.

[0080] In some embodiments of the present application, the battery device 100 can not only be used as the operating power supply of the vehicle 1000, but also be used as the driving power supply of the vehicle 1000, instead of or partially instead of fuel or natural gas to provide driving power for the vehicle 1000.

[0081] Please refer to Figure 2 , Figure 2An exploded view of a battery device 100 is provided for some embodiments of the present application. The battery device 100 includes a battery case and battery cells 110. In some embodiments, the battery case can include a first case 120 and a second case 130, the first case 120 and the second case 130 are coupled to each other, and the first case 120 and the second case 130 together define a receiving cavity for receiving the battery cells 110. The second case 130 can be a hollow structure with one end open, and the first case 120 can be a plate structure, the first case 120 is coupled to the open end of the second case 130, so that the first case 120 and the second case 130 together define the receiving cavity; the first case 120 and the second case 130 can also be hollow structures with one side open, and the open end of the first case 120 is coupled to the open end of the second case 130. Of course, the battery case formed by the first case 120 and the second case 130 can have various shapes, such as a cylinder, a cuboid, etc.

[0082] In embodiments of the present application, the battery cells 110 can be secondary batteries, which means that the battery cells 110 can be activated by charging after discharging to continue to be used.

[0083] The battery cells 110 can be lithium-ion batteries, sodium-ion batteries, sodium-lithium-ion batteries, lithium metal batteries, sodium metal batteries, lithium-sulfur batteries, magnesium-ion batteries, nickel-hydrogen batteries, nickel-cadmium batteries, lead-acid batteries, etc., which are not limited in embodiments of the present application.

[0084] In some embodiments, the battery cell 110 assembly is usually formed by arranging a plurality of battery cells 110.

[0085] As an example, the battery cell 110 assembly can be a battery module, and the battery module is formed by arranging and fixing a plurality of battery cells 110 to form an independent module. As an example, the battery module can be formed by bundling a plurality of battery cells 110 with a cable tie.

[0086] In some embodiments, the battery device 100 can be a battery pack, and the battery pack includes a battery case and one or more battery cell 110 assemblies, and the battery cell 110 assemblies are received in the battery case.

[0087] As an example, the battery cell 110 assembly can be a battery module, and the battery cell 110 assembly can be received in the battery case by fixing the battery module in the battery case.

[0088] As an example, the battery cell 110 assembly can also be received in the battery case by directly fixing a plurality of battery cells 110 in the battery case.

[0089] As an example, the battery case can include a first case 120 and a second case 130. The first case 120 and the second case 130 are fastened so that an enclosed space is formed inside the battery case to accommodate the battery cell 110 assembly. The enclosed here means covered or closed, which can be sealed or unsealed. The first case 120 can be a top cover or a bottom plate.

[0090] As an example, the battery case can include a top cover, a frame, and a bottom plate. The top cover and the bottom plate are connected to the frame so that an enclosed space is formed inside the battery case to accommodate the battery cell 110 assembly.

[0091] In some embodiments, the battery case can be part of the chassis structure of the vehicle 1000. For example, part of the battery case can be part of the floor of the vehicle 1000, or part of the battery case can be part of the cross beam and the longitudinal beam of the vehicle 1000.

[0092] Figure 3 The structural diagram of the battery cell 110 is provided for some embodiments of the present application. In the battery device 100, the battery cell 110 can be multiple, and the multiple battery cells 110 can be connected in series or in parallel or in a mixed connection, which means that there are both series and parallel connections among the multiple battery cells 110. The multiple battery cells 110 can be directly connected in series or in parallel or in a mixed connection, and then the whole multiple battery cells 110 are accommodated in the case; of course, the battery device 100 can also be that the multiple battery cells 110 are first connected in series or in parallel or in a mixed connection to form a battery module, and then the multiple battery modules are connected in series or in parallel or in a mixed connection to form a whole, which is accommodated in the case.

[0093] 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 thereto. The battery cell 110 can be in the shape of a cylinder, a flat body, a cuboid, or other shapes.

[0094] In some embodiments, the housing includes a shell and an end cap, the shell having an opening, and the end cap being connected to the shell and covering the opening; the shell is a component for cooperating with the end cap to form an internal cavity of the battery cell 110, and the internal cavity formed can be used to accommodate the electrode assembly, the electrolyte, and other components. The shell can be provided with one or more openings. The end cap can also be provided with one or more openings. The shell and the end cap can be independent components.

[0095] 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 12 can be the same as or different from that 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.), so that the end cap is not easily deformed under compression and impact, enabling 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 means. The housing can be open at one end or open at both ends. In some examples, the housing can be a structure with an opening on one side, and the end cap is set as one and closes to the housing. In other examples, the housing may also be an opening on both sides, with two end caps that respectively cover the two openings of the housing. The electrode assembly is the component within the battery cell 110 where the electrochemical reaction occurs. The housing may contain one or more electrode assemblies.

[0096] 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.

[0097] The structure of the battery device 100 will now be described in detail with reference to the accompanying drawings.

[0098] Please see Figures 3 to 6In a first aspect, the embodiments of the present application provide a battery device 100, comprising a battery box, a plurality of battery cells 110, an insulating piece 140, and a busbar component 150. The battery box is formed with an accommodating cavity. The plurality of battery cells 110 are arranged in the accommodating cavity. The battery cells 110 are provided with electrode terminals 111 on one side along a first direction X. The insulating piece 140 is arranged in the accommodating cavity. The insulating piece 140 comprises 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 side of the insulating body 141 away from the battery cells 110 along the first direction X. The first limiting portion 142 comprises a first part and a second part. The second part is arranged on the side of the first part away from the insulating body 141 along the first direction X. The busbar component 150 is connected to the electrode terminals 111. At least part of the busbar component 150 is located on the side of the insulating body 141 away from the battery cells 110 along the first direction X. The busbar component 150 is provided with a through hole 151. The first part of the first limiting portion 142 is accommodated in the through hole 151. In the first direction X, part of the busbar component 150 is located between the second part of the first limiting portion 142 and the insulating body 141. The second limiting portion 143 is arranged with the busbar component 150 along a second direction Y to limit the amplitude of rotation of the busbar component 150 around the first limiting portion 142. The first direction X and the second direction Y intersect each other.

[0099] In the battery device 100, the number of battery cells 110 can be two or more. Each battery cell 110 is provided with an electrode terminal 111 on one side along the first direction X for realizing input or output of current. The arrangement of the battery cells 110 in the battery box can be various, for example, the plurality of battery cells 110 can be arranged along a second direction Y or a 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 the plane intersecting or 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 one of the width direction and the height direction of the battery cell 110, and the third direction Z can be the other.

[0100] The insulating member 140 is a member for insulating and supporting the busbar member 150, and the material of the insulating member 140 includes an insulating material. In the insulating member 140, the insulating body 141 is a main body member for insulating and supporting, and is located on one side of the plurality of battery cells 110 along the first direction X, and can be in contact with the plurality of battery cells 110 to support the busbar member 150 between the battery cell 110 and the busbar member 150. In addition, the insulating body 141 can also be used to support other structures in the battery device 100, for example, can be used to support the sampling harness of the busbar member 150.

[0101] The insulating member 140 further includes a first limiting portion 142 provided on the insulating body 141, and the first limiting portion 142 is a member for connecting the busbar member 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, and the first limiting portion 142 includes a first portion and a second portion, the first portion can be accommodated in the through hole 151 of the busbar member 150, and one end of the first portion can be connected to the insulating body 141 along the first direction X, and the other end is connected to the second portion, that is, the second portion is connected to the insulating body 141 through the first portion. The second portion can protrude relative to the first portion in a plane perpendicular to the first direction X, and part of the second portion can be arranged opposite to the insulating body 141 along the first direction X, so that part of the busbar member 150 can be located between the insulating body 141 and the second portion along the first direction X, and the other part can be located outside the second portion, at this time, the part of the busbar member 150 located between the insulating body 141 and the second portion is equivalent to being pressed to the insulating body 141 along the first direction X by the second portion. The structure of the first limiting portion 142 can be various, for example, the first limiting portion 142 can be a hot rivet column, or the first limiting portion 142 can also be a fastening structure matched with a bolt and a nut, etc. The connection mode of the first limiting portion 142 and the insulating body 141 can be various, for example, the first limiting portion 142 and the insulating body 141 can be an integral molding structure, or the first limiting portion 142 can be connected to the insulating body 141 by bonding or the like.

[0102] The insulating member 140 further comprises a second limiting portion 143 arranged on the insulating body 141, the second limiting portion 143 is a component for limiting the rotation of the busbar component 150 around the portion of the first limiting portion 142 accommodated in the through hole 151, so as to reduce the rotation amplitude of the busbar component 150. The second limiting portion 143 protrudes from the side of the insulating body 141 away from the battery monomer 110 along the first direction X, which can be arranged separately from the first limiting portion 142 and located on one side of the busbar component 150 along the second direction Y, at this time, in the second direction Y, the projection of the second limiting portion 143 and the busbar component 150 on the battery box can overlap each other. During the use of the battery device 100, the side surface of the second limiting portion 143 close to the busbar component 150 along the second direction Y can abut against the busbar component 150, so as to limit the rotation of the busbar component 150 around the portion of the first limiting portion 142 accommodated in the through hole 151.

[0103] It should be noted that when the second limiting portion 143 is located on one side of the busbar component 150 along the second direction Y, the second limiting portion 143 can be in contact with the busbar component 150, or can be arranged separately from the busbar component 150. The second direction Y can be any one direction in the plane intersecting or perpendicular to the first direction X, that is, the second limiting portion 143 can be located on any one side of the busbar component 150 in the aforementioned plane. The shape of the second limiting portion 143 can be various, for example, the second limiting portion 143 can be a plate-shaped structure, or the second limiting portion 143 can also be a rod-shaped or other regular or irregular shape. The connection mode of the second limiting portion 143 and the insulating body 141 can be various, for example, the second limiting portion 143 and the insulating body 141 can be an integral molding structure, or the second limiting portion 143 can be connected to the insulating body 141 by bonding or the like.

[0104] The busbar component 150 is a component for realizing series connection, parallel connection or mixed connection of two battery monomers 110. At least part of the busbar component 150 located on the side of the insulating body 141 away from the battery monomer 110 in the first direction X can refer to the whole of the busbar component 150 located on the side of the insulating body 141 away from the battery monomer 110 in the first direction X, or it can refer to part of the busbar component 150 arranged on the side of the insulating body 141 in the first direction X, and the other part can extend beyond the insulating body 141 in a plane perpendicular to the first direction X, at this time, in the first direction X, the projection of the part of the busbar component 150 located on the side of the insulating body 141 in the first direction X on the battery box is within the projection of the insulating body 141 on the battery box, and this part of the busbar component 150 is blocked by the insulating body 141, while the projection of the part of the busbar component 150 extending beyond the insulating body 141 on the battery box is outside the projection of the insulating body 141 on the battery box, which can be used to connect with the electrode terminal 111 of the battery monomer 110. The busbar component 150 is provided with a through hole 151 in the first direction X, the number of the through hole 151 can be one or multiple, the through hole 151 is used to accommodate part of the first limiting portion 142, so that the first limiting portion 142 can pass through the busbar component 150 in the first direction X. Among them, part of the busbar component 150 is located between the part of the first limiting portion 142 and the insulating body 141 in the first direction X, and this part of the busbar component 150 is equivalent to being pressed to the insulating body 141 in the first direction X by the first limiting portion 142.

[0105] In the above scheme, the first limiting portion 142 protrudes from the side of the insulating body 141 away from the battery monomer 110 along the first direction X, at least part of the busbar component 150 is located at the side of the insulating body 141 away from the battery monomer 110 along the first direction X, the first part of the first limiting portion 142 is accommodated in the through hole 151 of the busbar component 150, and in the first direction X, part of the busbar component 150 is located between the second part of the first limiting portion 142 and the insulating body 141, so that the busbar component 150 can be pressed to the insulating body 141 along the first direction X by the first limiting portion 142, and the busbar component 150 can be limited along the first direction X and other directions perpendicular to the first direction X. On this basis, by setting the second limiting portion 143 protruding from the side of the insulating body 141 away from the battery monomer 110 along the first direction X, and the second limiting portion 143 is arranged with the busbar component 150 along the second direction Y to limit the amplitude of the rotation of the busbar component 150 around the first limiting portion 142, on the one hand, it can improve the stability of the busbar component 150 and improve the connection reliability of the busbar component 150 and the electrode terminal 111, on the other hand, the second limiting portion 143 and the part of the insulating body 141 for supporting the second limiting portion 143 occupy less space on the side of the busbar component 150 close to the electrode terminal 111 along the first direction X, or even do not need to occupy the corresponding space, thus helping to increase the connection area of the electrode terminal 111 and the busbar component 150, further improving the connection reliability of the busbar component 150 and the electrode terminal 111, and further improving the reliability of the battery device 100.

[0106] It should be noted that the second limiting portion 143 is used to limit the busbar component 150 in the embodiment of the application to reduce the space occupation on the side of the busbar component 150 close to the electrode terminal 111 along the first direction X, or even do not need to occupy the space on the side of the busbar component 150 close to the electrode terminal 111 along the first direction X, so that the side of the busbar component 150 close to the electrode terminal 111 along the first direction X has sufficient space 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, and further increases the connection area of the electrode terminal 111 and the busbar component 150. At this time, not only the connection reliability between the busbar component 150 and the electrode terminal 111 is improved, but also the current transmission capacity between the busbar component 150 and the electrode terminal 111 is improved.

[0107] Please refer to Figures 5 to 7In some embodiments, the second limiting part 143 includes a limiting plate 1431 and a buckle 1432. The limiting plate 1431 is connected with the insulating body 141 and is arranged with the busbar component 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 further includes a wire harness 160. The wire harness 160 is disposed on the insulating body 141. At least part of the wire harness 160 is located between the insulating body 141 and the buckle 1432 along the first direction X.

[0108] The limiting plate 1431 is a component of the second limiting part 143 for limiting the rotation of the busbar component 150 around the part of the first limiting part 142 accommodated in the through hole 151. The limiting plate 1431 is connected with the insulating body 141 and protrudes from the side of the insulating body 141 away from the battery monomer 110 along the first direction X and is arranged with the busbar component 150 along the second direction Y. Therefore, the side surface of the limiting plate 1431 close to the busbar component 150 along the second direction Y can be used to abut against the busbar component 150 to limit the rotation of the busbar component 150 around the aforementioned part of the first limiting part 142 to a certain extent. It should be noted that the connecting manner of the limiting plate 1431 with the insulating body 141 is various, for example, the limiting plate 1431 can be an integral molding structure with the insulating body 141, or the limiting plate 1431 can be connected to the insulating body 141 by adhesion or other manners.

[0109] The buckle 1432 is a component of the second limiting part 143 for limiting the wire harness 160. The buckle 1432 is disposed on the limiting plate 1431 and is spaced apart from the insulating body 141 along the first direction X. There is a certain spacing area between the two, which can be used to dispose the wire harness 160.

[0110] The wire harness 160 is a component for realizing the functions of electrical connection, voltage and temperature adoption of the busbar 150, and can be arranged on the insulating body 141 and extend from the insulating body 141 to be electrically connected with the busbar 150. The number of the wire harness 160 can be multiple, and the multiple wire harnesses 160 can be bundled as a whole by a cable tie. At least part of the wire harness 160 is located in the above-mentioned interval region, that is, the at least part of the wire harness 160 can be located between the buckle 1432 and the insulating body 141 along the first direction X, and thus the at least part of the wire harness 160 can be positioned along the first direction X by the buckle 1432. It should be noted that the at least part of the wire harness 160 located between the insulating body 141 and the buckle 1432 along the first direction X can be that all the wire harnesses 160 on the insulating body 141 are located between the buckle 1432 and the insulating body 141 along the first direction X, or that part of the wire harnesses 160 on the insulating body 141 are located between the buckle 1432 and the insulating body 141 along the first direction X, and the remaining wire harnesses 160 are located outside the buckle 1432 and the insulating body 141.

[0111] In the above-mentioned scheme, the limiting plate 1431 and the busbar 150 are arranged along the second direction Y, so that the busbar 150 can be positioned by the limiting plate 1431, and the risk of rotation of the busbar 150 around the part of the first limiting portion 142 accommodated in the through hole 151 is reduced. On this basis, by arranging the buckle 1432 on the limiting plate 1431, the buckle 1432 and the insulating body 141 are arranged in the first direction X, so that at least part of the wire harness 160 arranged on the insulating body 141 can be positioned in the first direction X by the buckle 1432, and the stability and reliability of the wire harness 160 can be improved.

[0112] Please continue to refer to Figure 6 and Figure 7 In some embodiments, the insulating body 141 includes a body portion 1411 and a support plate 1412 arranged along the second direction Y, the busbar 150 is located on one side of the support plate 1412 along the first direction X, and the second limiting portion 143 is located between the body portion 1411 and the support plate 1412.

[0113] The body part 1411 is a part of the insulation body 141 for insulating and supporting the wire harness 160 and other structures in the battery device 100. The body part 1411 is arranged on one side of the plurality of battery cells 110 along the first direction X, and the projection of the body part 1411 on the battery box along the first direction X can be located between the two electrode terminals 111 of the battery cell 110. Alternatively, in the first direction X, the projection of the body part 1411 on the box can overlap with the projection of the pressure relief mechanism of the battery cell 110 on the box, so that a pressure relief opening can be formed on the body part 1411 along the first direction X to release pressure through the pressure relief opening. Alternatively, part of the body part 1411 can be in contact with the battery cell 110, and the other part can be arranged apart from the battery cell 110 along the first direction X to reduce the influence of the battery cell 110 on the body part 1411.

[0114] The support plate 1412 is a part of the insulation body 141 for supporting the busbar component 150. The support plate 1412 is arranged on one side of the body part 1411, and the side of the support plate 1412 close to the battery cell 110 along the first direction X can be in contact with the battery cell 110, and the side away from the battery cell 110 can be in contact with part of the busbar component 150 to support the busbar component 150 between the battery cell 110 and the busbar component 150.

[0115] The support plate 1412 is arranged along the second direction Y with the body part 1411, and the second limiting part 143 is located between the body part 1411 and the support plate 1412, that is, the second limiting part 143 is arranged on the side of the support plate 1412 close to the body part 1411 along the second direction Y. Compared with arranging 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 body part 1411 can be more compact, and the risk of interference between the second limiting part 143 and other structures in the battery device 100 can be reduced.

[0116] In addition, when the second limiting part 143 is located between the body part 1411 and the support plate 1412, it can protrude from the side of the support plate 1412 away from the battery cell 110 along the first direction X. When the busbar component 150 is arranged on the side of the support plate 1412 away from the battery cell 110 along the first direction X, the side of the second limiting part 143 close to the busbar component 150 along the second direction Y can be in abutment with the busbar component 150 to limit the busbar component 150 and reduce the risk of rotation of the busbar component 150 around the aforementioned part of the first limiting part 142.

[0117] Please refer to Figure 8In some embodiments, the plurality of battery cells 110 are arranged along a third direction Z, and a plurality of support plates 1412 and a plurality of busbar components 150 are provided, and the plurality of support plates 1412 and the plurality of busbar components 150 are spaced along the third direction Z, and the two ends of the busbar component 150 beyond the support plate 1412 in the third direction Z are connected to the electrode terminals 111 of the two battery cells 110, and the third direction Z intersects the first direction X and the second direction Y, respectively.

[0118] Specifically, the plurality of support plates 1412 can be provided one-to-one with the plurality of busbar components 150, that is, one busbar component 150 is provided on one side of the support plate 1412 away from the battery cell 110 along the first direction X. The number of support plates 1412 can be the same as the number of busbar components 150, or can be different. Optionally, the number of support plates 1412 can be greater than the number of busbar components 150, and when the plurality of busbar components 150 are provided one-to-one on the plurality of support plates 1412, other spare support plates 1412 can be provided between the adjacent two busbar components 150. The spare support plate 1412 can be used as a spare support plate 1412 to support the busbar component 150 in other use scenarios, so as to improve the flexibility of the installation of the busbar component 150 and expand the application range of the insulating piece 140.

[0119] When the busbar component 150 is provided on the side of the support plate 1412 away from the battery cell 110 along the first direction X, the two ends of the busbar component 150 beyond the support plate 1412 in the third direction Z are located outside the projection of the support plate 1412 on the battery box in the first direction X. The two parts of the busbar component 150 can be connected to the electrode terminals 111 of the two battery cells 110, respectively, so as to realize the series or parallel connection of the two battery cells 110.

[0120] In the above scheme, the plurality of support plates 1412 are spaced along the third direction Z, and at this time, the plurality of support plates 1412 can support the plurality of busbar components 150, improve the stability of each busbar component 150, and at the same time, the interval region between the adjacent two support plates 1412 can be used to set other structures of the battery device 100, so that the structure of the battery device 100 is more compact. On this basis, the two ends of the busbar component 150 beyond the support plate 1412 in the third direction Z, and the two parts beyond the support plate 1412 can be connected to the electrode terminals 111 of the two battery cells 110, respectively, so as to realize the series or parallel connection of the two battery cells 110.

[0121] In some embodiments, at least part of the support plates 1412 are located between the electrode terminals 111 of the adjacent two battery cells 110 in the third direction Z.

[0122] In the third direction Z, the at least partial support plate 1412 being located between the electrode terminals 111 of the adjacent two battery monomers 110 can mean that the whole of the support plate 1412 is located between the electrode terminals 111 of the adjacent two battery monomers 110 in the third direction Z, or that part of the support plate 1412 is located between the electrode terminals 111 of the adjacent two battery monomers 110 in the third direction Z, while the other part is located outside the electrode terminals 111 of the adjacent two battery monomers 110. It should be noted that the at least partial support plate 1412 being located between the electrode terminals 111 of the adjacent two battery monomers 110 can mean that the at least partial support plate 1412 is arranged in the interval space between the electrode terminals 111 of the adjacent two battery monomers 110, the projection of the at least partial support plate 1412 on the battery box in the first direction X is located between the projections of the electrode terminals 111 of the adjacent two battery monomers 110 on the battery box in the first direction X, and the projection of the at least partial support plate 1412 on the battery box in the third direction Z overlaps the projections of the electrode terminals 111 of the adjacent two battery monomers 110 on the battery box in the third direction Z.

[0123] In the above scheme, the at least partial support plate 1412 is arranged in the interval space between the electrode terminals 111 of the adjacent two battery monomers 110 in the third direction Z, which can reasonably utilize the interval space, so that the structure of the insulating part 140 and the battery monomer 110 is more compact. At this time, the two parts of the busbar component 150 protruding relative to the support plate 1412 can be respectively attached to the corresponding electrode terminals 111 in the first direction X, which helps to realize the connection of the busbar component 150 and the corresponding electrode terminals 111.

[0124] Please continue to refer to Figure 5 In some embodiments, the second limiting part 143 is provided with a wire passing channel 1433, and the wire passing channel 1433 communicates the two sides of the second limiting part 143 in the second direction Y, and is used for the wire harness 160 to pass through.

[0125] The wire passing channel 1433 is an opening structure of the second limiting part 143 for the wire harness 160 to pass through, which is formed by the second limiting part 143 in the second direction Y, and the wire passing channel 1433 respectively communicates the two sides of the second limiting part 143 in the second direction Y. Since the main body part 1411 and the support plate 1412 are arranged in the second direction Y, and the second limiting part 143 is located between the main body part 1411 and the support plate 1412, the wire harness 160 can extend from one side of the main body part 1411 in the first direction X to one side of the support plate 1412 in the first direction X through the wire passing channel 1433, so as to be connected with the busbar component 150 on the support plate 1412.

[0126] It should be noted that when the second limiting portion 143 includes the limiting plate 1431 and the buckle 1432, the wire passing channel 1433 can be formed on the limiting plate 1431, so that the wire harness 160 can pass through the wire passing channel 1433 to pass through the limiting plate 1431 and extend to the connection with the busbar component 150.

[0127] The shape of the wire passing channel 1433 is various, for example, the shape of the wire passing channel 1433 can be a regular shape such as a circular hole, or the wire passing channel 1433 can also be an irregular shape. Exemplarily, the wire passing channel 1433 can include a wire passing hole 1434 and a gap 1435 connected through the wire passing hole 1434. The wire passing hole 1434 can be formed by the second limiting portion 143 along the second direction Y, and the shape is various, for example, the wire passing hole 1434 can be a square hole, or a circular shape, or the wire passing hole 1434 can also be other irregular shapes. The gap 1435 is located on one side of the wire passing hole 1434 along the first direction X, and extends from the wire passing hole 1434 to the edge of the second limiting portion 143 along the first direction X. Therefore, in the assembly process of the wire harness 160, the wire harness 160 can enter the wire passing hole 1434 through the gap 1435, and when the wire harness 160 in the wire passing hole 1434 needs to be disassembled, the wire harness 160 can also be removed from the wire passing hole 1434 through the gap 1435.

[0128] In the above scheme, on the basis of arranging the second limiting portion 143 between the main body portion 1411 and the support plate 1412, the second limiting portion 143 is further arranged to form a wire passing channel 1433, so that the wire passing channel 1433 communicates both sides of the second limiting portion 143 along the second direction Y. In the assembly process of the battery device 100, the wire harness 160 can directly extend to one side of the support plate 1412 along the first direction X from the main body portion 1411 through the wire passing channel 1433 and be connected with the busbar component 150 located on the support plate 1412, without passing through the second limiting portion 143. On the one hand, it can reduce the assembly difficulty of the wire harness 160 and improve the assembly efficiency, and on the other hand, it can shorten the length of the wire harness 160 and save costs.

[0129] In some embodiments, in the first direction X, the projection of the through hole 151 on the insulating body 141 is located between the projections of the electrode terminals 111 of the adjacent two battery monomers 110 on the insulating body 141.

[0130] In the above scheme, the projection of the through hole 151 on the insulating body 141 along the first direction X is located between the projections of the electrode terminals 111 of the two adjacent battery monomers 110 on the insulating body 141 along the first direction X, that is, the through hole 151 is arranged corresponding to the interval region between the two adjacent electrode terminals 111, and the through hole 151 is arranged staggered with the electrode terminal 111. Compared with the projection of the through hole 151 on the insulating body 141 along the first direction X overlapping the projection of the electrode terminal 111 on the insulating body 141 along the first direction X, on the one hand, it can reduce the possibility of the through hole 151 occupying the space in the busbar component 150 for connecting with the electrode terminal 111, increase the connection area of the busbar component 150 and the electrode terminal 111, and reduce the connection resistance between the busbar component 150 and the electrode terminal 111, which is beneficial to improve the current transmission capacity between the electrode terminal 111 and the busbar component 150, reduce the energy loss between the two, and on the other hand, it can reduce the risk of interference between the first limiting portion 142 cooperating with the through hole 151 and the electrode terminal 111.

[0131] In some embodiments, the plurality of battery monomers 110 are arranged along the third direction Z, and the distance of the through hole 151 to the electrode terminals 111 of the two adjacent battery monomers 110 along the third direction Z is the same.

[0132] Specifically, the distance of the through hole 151 to the electrode terminals 111 of the two adjacent battery monomers 110 along the third direction Z can be the minimum distance of the edge of the through hole 151 to the edge of the electrode terminals 111 of the two adjacent battery monomers 110 along the third direction Z, that is, the minimum distance of the edge of the through hole 151 to the edge of the electrode terminals 111 of the two adjacent battery monomers 110 along the third direction Z. Alternatively, the distance can also be the distance of the center of the through hole 151 along the third direction Z to the center of the electrode terminal 111 along the third direction Z. It should be noted that the "same" in the embodiments of the present application can be approximately the same, and is not limited to exactly the same, for example, when the distance of the through hole 151 to the electrode terminals 111 of the two adjacent battery monomers 110 along the third direction Z is the same, the two distance values can have a small difference.

[0133] In the above scheme, the distance of the through hole 151 to the electrode terminals 111 of the two adjacent battery monomers 110 in the third direction Z is the same, and at this time, the through hole 151 is approximately located at the center position between the electrode terminals 111 of the two adjacent battery monomers 110, that is, approximately located at the center position of the busbar component 150 in the third direction Z, which helps to improve the uniformity of the stress distribution on the busbar component 150. And when the through hole 151 is approximately located at the center position between the electrode terminals 111 of the two adjacent battery monomers 110, the first limiting portion 142 used in cooperation with the through hole 151 is also approximately located at the center position between the electrode terminals 111 of the two adjacent battery monomers 110, that is, the connecting point of the insulating piece 140 and the busbar component 150 is approximately located at the center position between the electrode terminals 111 of the two adjacent battery monomers 110, which can improve the stability of the support of the insulating piece 140 to the busbar component 150.

[0134] Please refer to Figure 9 In some embodiments, the busbar component 150 is provided with a plurality of through holes 151, and in the first direction X, the projections of the plurality of through holes 151 on the insulating body 141 are located between the projections of the electrode terminals 111 of the two adjacent battery monomers 110 on the insulating body 141, and the plurality of through holes 151 are arranged in the second direction Y.

[0135] Specifically, in the insulating piece 140, the number of the first limiting portion 142 can be one or more. When the number of the first limiting portion 142 is one, a part of the first limiting portion 142 can accommodate a plurality of through holes 151 of the busbar component 150 at the same time, and when the number of the first limiting portion 142 is more, the plurality of first limiting portions 142 can be arranged one-to-one with the plurality of through holes 151.

[0136] In the busbar component 150, the plurality of through holes 151 are arranged in the second direction Y between the electrode terminals 111 of the two adjacent battery monomers 110, and the distance of any one of the plurality of through holes 151 to the electrode terminals 111 of the two adjacent battery monomers 110 in the third direction Z can be the same or different. And the distances of different through holes 151 to the electrode terminals 111 of the two adjacent battery monomers 110 in the third direction Z are different.

[0137] In the above scheme, by arranging a plurality of through holes 151 in the region of the busbar component 150 corresponding to the electrode terminals 111 of the two adjacent battery monomers 110, the plurality of through holes 151 are arranged in the second direction Y, which can further lock the busbar component 150 by cooperating the plurality of through holes 151 with the first limiting portion 142 without occupying the space of the busbar component 150 for connecting with the electrode terminals 111, thereby further improving the stability of the busbar component 150.

[0138] In some embodiments, at least one of the first limiting portion 142 and the second limiting portion 143 is an integral structure with the insulating body 141.

[0139] Specifically, the insulating body 141 can be an integral structure with the first limiting portion 142, and a separate structure with the second limiting portion 143. Alternatively, the insulating body 141 can be an integral structure with the second limiting portion 143, and a separate structure with the first limiting portion 142. Alternatively, the insulating body 141, the first limiting portion 142, and the second limiting portion 143 can all be integral structures.

[0140] At least one of the first limiting portion 142 and the second limiting portion 143 being an integral structure with the insulating body 141 means that at least one of the first limiting portion 142 and the second limiting portion 143 is prepared into an integral whole with the insulating body 141 by the same process, and subsequent connection is not required by additional processes. For example, at least one of the first limiting portion 142 and the second limiting portion 143 can be prepared by an injection molding process to form an integral whole with the insulating body 141 during the injection molding process.

[0141] In the above scheme, by providing at least one of the first limiting portion 142 and the second limiting portion 143 as an integral structure with the insulating body 141, the connection reliability of at least one of the first limiting portion 142 and the second limiting portion 143 with the insulating body 141 can be improved, the stability of the current collecting component 150 can be improved, and the assembly time of at least one of the first limiting portion 142 and the second limiting portion 143 with the insulating body 141 can be saved, thereby improving the assembly efficiency of the battery device 100.

[0142] Please refer to Figure 10 In some embodiments, the current collecting component 150 includes a first current collecting portion 152, a second current collecting portion 153, and a buffer portion 154. The first current collecting portion 152 and the second current collecting portion 153 are respectively electrically connected to the electrode terminals 111 of the two battery monomers 110. The buffer portion 154 is arranged between the first current collecting portion 152 and the second current collecting portion 153. The through hole 151 is arranged in the first current collecting portion 152.

[0143] The first current collecting portion 152 and the second current collecting portion 153 are components in the current collecting component 150 for connecting to the electrode terminals 111 of the two battery monomers 110. The first current collecting portion 152 is connected to the electrode terminals 111 of one battery monomer 110, and the second current collecting portion 153 is connected to the electrode terminals 111 of another battery monomer 110. The first current collecting portion 152 and the second current collecting portion 153 are connected through the buffer portion 154, thereby realizing the series connection or parallel connection of the two battery monomers 110.

[0144] The buffer portion 154 is a portion of the busbar member 150 that is configured to absorb the expansion force generated when the battery cell 110 swells and to deform under the expansion force. The direction and degree of deformation of the buffer portion 154 are adapted to the change in the relative position of the electrode terminals 111 of the two battery cells 110.

[0145] It can be understood that, during use of the battery device 100, if the battery cell 110 swells, the position of the corresponding electrode terminal 111 will generally change with the swelling of the battery cell 110, resulting in a change in the relative position of the electrode terminals 111 of the two battery cells 110, which causes the busbar member 150 connected to the corresponding electrode terminal 111 to be pulled apart and separated from the electrode terminal 111, thereby affecting the connection reliability.

[0146] Therefore, the above scheme sets the buffer portion 154 between the first busbar member 152 and the second busbar member 153. The buffer portion 154 can absorb the corresponding expansion force and deform when the battery cell 110 swells, thereby buffering the change in the relative position of the electrode terminals 111 of the two battery cells 110, reducing the risk of the busbar member 150 being separated from the electrode terminal 111 during the expansion of the battery cell 110, thereby improving the connection reliability of the busbar member 150 and the electrode terminal 111.

[0147] Optionally, in the third direction Z, the buffer portion 154 can extend in a curved manner. Therefore, when the battery cell 110 swells, the buffer portion 154 can absorb the corresponding expansion force and deform in the third direction Z, thereby buffering the change in the relative position of the electrode terminals 111 of the two battery cells 110. Further, the buffer portion 154 can be arranged in an arc shape, thereby improving the buffering effect on the change in the relative position of the electrode terminals 111 of the two battery cells 110.

[0148] The through hole 151 is arranged on the first busbar member 152, i.e., the first limiting portion 142 presses the busbar member 150 against the insulating body 141 through the through hole 151 at the first busbar member 152. Compared with arranging the through hole 151 on the buffer portion 154, the influence of the deformation of the buffer portion 154 on the connection effect of the first limiting portion 142 and the through hole 151 can be reduced, thereby improving the connection reliability of the first limiting portion 142 and the busbar member 150.

[0149] In some embodiments, the insulating member 140 is symmetrically arranged along the center line of the insulating member 140 in the width direction of the insulating member 140.

[0150] The width direction of the insulating piece 140 can be a second direction Y of the present application, and the line connecting the midpoints of each part of the insulating piece 140 along the third direction Z in the second direction Y can form the above-mentioned center line, which extends along the third direction Z. Along the aforementioned center line, the insulating piece 140 is symmetrically arranged, and at this time, the center line is the symmetry axis of the insulating piece 140. It should be noted that when the insulating piece 140 is symmetrically arranged along the center line, and the insulating body 141 includes the body part 1411 and the plurality of support plates 1412, the body part 1411 is provided with a plurality of support plates 1412 on both sides along the second direction Y, and the positions, shapes, sizes, etc. of the support plates 1412 on both sides are symmetrical along the center line.

[0151] In the above-mentioned scheme, the insulating piece 140 is symmetrically arranged along the center line in the width direction thereof, which helps to improve the universality of the insulating piece 140 and reduce the mold opening cost of the insulating piece 140.

[0152] In some embodiments, the insulating body 141 and the busbar component 150 are riveted through the first limiting part 142.

[0153] Specifically, the insulating body 141 and the busbar component 150 can be riveted through the first limiting part 142 in various ways, for example, the insulating body 141 and the busbar component 150 can be hot riveted through the first limiting part 142, or other riveting methods such as cold riveting can be used to connect the insulating body 141 and the busbar component 150. In order to facilitate the description, the present application takes the hot riveting of the insulating body 141 and the busbar component 150 through the first limiting part 142 as an example to explain the following scheme.

[0154] In the connection process of the insulating piece 140 and the busbar component 150, the material of the first limiting part 142 can be first passed through the through hole 151 of the busbar component 150, and then the material of the first limiting part 142 is subjected to pressure by a hot riveting machine or a hot riveting gun and the like, so that the material is plastically deformed, thereby forming a first part located in the through hole 151 and a second part located on the side of the first part and 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, and the busbar component 150 is locked to the insulating body 141 through the cooperation of the second part and the first part.

[0155] In the above-mentioned scheme, the insulating body 141 and the busbar component 150 are riveted through the first limiting part 142, which can improve the reliability of the connection and reduce the difficulty of the connection.

[0156] The second aspect of the present application provides a kind of energy storage device, including the battery device 100 of any one of the above.

[0157] The energy storage device provided by the embodiments of the present application has the technical effects of the technical solutions of the battery device 100 in any of the above embodiments, and the same or corresponding structures and explanations of terms in the above embodiments will not be repeated here.

[0158] According to some embodiments of the present application, the battery device 100 comprises a battery box, a plurality of battery monomers 110, an insulating piece 140 and a busbar component 150, the battery box is formed with an accommodation cavity, the plurality of battery monomers 110 are arranged in the accommodation cavity, and the battery monomers 110 are provided with electrode terminals 111 on one side along a first direction X; the insulating piece 140 is arranged in the accommodation cavity, the insulating piece 140 comprises an insulating body 141, a first limiting part 142 and a second limiting part 143, the insulating body 141 is located on one side of the plurality of battery monomers 110 along the first direction X, the first limiting part 142 and the second limiting part 143 protrude from the side of the insulating body 141 away from the battery monomers 110 along the first direction X, the first limiting part 142 comprises a first part and a second part, and the second part is arranged on the side of the first part away from the insulating body 141 along the first direction X; the busbar component 150 is connected to the electrode terminals 111, at least part of the busbar component 150 is located on the side of the insulating body 141 away from the battery monomers 110 along the first direction X, the busbar component 150 is provided with a through hole 151, the first part of the first limiting part 142 is accommodated in the through hole 151, and in the first direction X, part of the busbar component 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 component 150 along a second direction Y to limit the amplitude of the rotation of the busbar component 150 around the first limiting part 142, and the first direction X and the second direction Y intersect with each other. Wherein, the second limiting part 143 comprises a limiting plate 1431 and a buckle 1432, the limiting plate 1431 is connected with the insulating body 141 and arranged with the busbar component 150 along the second direction Y, and the buckle 1432 is arranged on the limiting plate 1431 and spaced apart from the insulating body 141 along the first direction X; the battery device 100 further comprises a wire harness 160, the wire harness 160 is arranged on the insulating body 141, and at least part of the wire harness 160 is located between the insulating body 141 and the buckle 1432 along the first direction X. The insulating body 141 comprises a body part 1411 and a support plate 1412 arranged along the second direction Y, the busbar 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 body part 1411 and the support plate 1412. The plurality of battery monomers 110 are arranged along a third direction Z, the support plate 1412 and the busbar component 150 are both multiple, the plurality of support plates 1412 and the plurality of busbar components 150 are both spaced apart along the third direction Z, in the third direction Z, both ends of the busbar component 150 exceed the support plate 1412, and are connected with the electrode terminals 111 of two battery monomers 110, and the third direction Z intersects with the first direction X and the second direction Y respectively. The second limiting part 143 is provided with a wire passing channel 1433, the wire passing channel 1433 communicates between both sides of the second limiting part 143 along the second direction Y, and the wire passing channel 1433 is used for the wire harness 160 to pass through.The current-converging member 150 includes a first current-converging portion 152, a second current-converging portion 153, and a buffer portion 154, the first current-converging portion 152 and the second current-converging portion 153 are electrically connected with the electrode terminals 111 of the two battery cells 110 respectively, the buffer portion 154 is arranged between the first current-converging portion 152 and the second current-converging portion 153, and a through hole 151 is arranged in the first current-converging portion 152. The insulating member 140 is symmetrically arranged along the center line of the insulating member 140 in the width direction of the insulating member 140.

[0159] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, and are not limited thereto; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that the technical solutions recorded in the foregoing embodiments can still be modified, or some or all of the technical features can be replaced by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should be covered in the scope of the claims and the specification of the present application. In particular, as long as there is no structural conflict, each technical feature mentioned in each embodiment can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A battery device, characterized by, The battery device comprises: a battery box body formed with a receiving cavity, a plurality of battery cells arranged in the receiving cavity, the battery cells being provided with electrode terminals on one side in a first direction; an insulation member arranged in the receiving cavity, the insulation member comprising an insulation main body, a first limiting portion and a second limiting portion, the insulation main body being located on one side of the plurality of battery cells in the first direction, the first limiting portion and the second limiting portion being protruded from one side of the insulation main body away from the battery cells in the first direction, the first limiting portion comprising a first part and a second part, the second part being arranged on one side of the first part away from the insulation main body in the first direction; a busbar member connected to the electrode terminals, at least part of the busbar member being located on one side of the insulation main body away from the battery cells in the first direction, the busbar member being provided with a through hole, the first part of the first limiting portion being accommodated in the through hole, in the first direction, part of the busbar member being located between the second part of the first limiting portion and the insulation main body, the second limiting portion being arranged with the busbar member in a second direction, the first direction and the second direction intersecting each other.

2. The battery device according to claim 1, characterized by The second limiting portion comprises a limiting plate and a buckle, the limiting plate being connected with the insulation main body and arranged with the busbar member in the second direction, the buckle being arranged on the limiting plate and spaced apart from the insulation main body in the first direction; The battery device further comprises a wire harness, the wire harness being arranged on the insulation main body, at least part of the wire harness being located between the insulation main body and the buckle in the first direction.

3. The battery device of claim 1, wherein The insulation main body comprises a main body portion arranged in the second direction and a support plate, the busbar member being located on one side of the support plate in the first direction, the second limiting portion being located between the main body portion and the support plate.

4. The battery device of claim 3, wherein A plurality of the battery cells are arranged in a third direction, the support plate and the busbar member are both multiple, the plurality of support plates and the plurality of busbar members are both spaced apart in the third direction, In the third direction, both ends of the busbar member exceed the support plate and are respectively connected with the electrode terminals of two battery cells, the third direction intersects the first direction and the second direction respectively.

5. The battery device of claim 3, 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 of claim 3, wherein The second limiting portion is provided with a wire passing channel, the wire passing channel being communicated between both sides of the second limiting portion in the second direction, the wire passing channel being used for the wire harness to pass through.

7. The battery device of claim 1, wherein In the first direction, the projection of the through hole on the insulation main body is located between the projections of the electrode terminals of two adjacent battery cells on the insulation main body.

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

9. The battery device of claim 7, 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 located between the projections of the electrode terminals of two adjacent battery cells on the insulating body, and the plurality of through holes are arranged along the second direction.

10. The battery device according to any one of claims 1 to 9, wherein At least one of the first limiting portion and the second limiting portion is an integral molding structure with the insulating body.

11. The battery device according to any one of claims 1 to 9, wherein The busbar component includes a first busbar, a second busbar, and a buffer portion, the first busbar and the second busbar are electrically connected with the electrode terminals of two battery cells respectively, The buffer portion is arranged between the first busbar and the second busbar, and the through hole is arranged in the first busbar.

12. The battery device according to any one of claims 1 to 9, wherein Along the center line of the insulating member in its own width direction, the insulating member is symmetrically arranged.

13. The battery device according to any one of claims 1 to 9, wherein The insulating body and the busbar component are riveted through the first limiting portion.

14. An energy storage device, characterized by, The battery device includes any one of claims 1-13.

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