Battery device, assembling method thereof and power utilization device

Abstract

The invention discloses a battery device and an assembling method thereof and a power utilization device, the battery device comprises a box body and a battery monomer assembly, the battery monomer assembly is arranged in the box body and comprises a heat management unit and at least one battery monomer group, the heat management unit comprises a current collection part and a plurality of heat exchange parts, the plurality of heat exchange parts are arranged at intervals along a first direction, a battery monomer group is arranged between every two adjacent heat exchange parts, and the current collecting parts are positioned on at least one side of the battery monomer group along a second direction; the end, in the second direction, of the heat exchange component is a heat exchange end, a penetrating hole is formed in the heat exchange end, the penetrating hole penetrates through the heat exchange end in the first direction, the flow collecting component penetrates through the penetrating hole, a heat exchange flow channel for heat exchange media to flow is formed in the heat exchange component, and a flow collecting channel for the heat exchange media to flow is formed in the flow collecting component. And the heat exchange runners are communicated with the flow collecting channels. According to the battery device provided by the embodiment of the invention, the assembly process is simple, the assembly is convenient, and the assembly efficiency is high.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of battery, in particular to a battery device, an assembling method thereof and a power utilization device. BACKGROUND

[0002] In the related art, a thermal management unit is arranged in a battery device for temperature regulation of battery monomers. In order to increase the temperature regulation efficiency of the thermal management unit on the battery monomers, the thermal management unit is arranged to include a plurality of heat exchange plates and a plurality of flow collecting pipes, each adjacent two heat exchange plates are connected by a flow collecting pipe, and the heat exchange plate and the flow collecting pipe are connected in a butt joint, and a battery monomer group is arranged between adjacent heat exchange plates to improve heat exchange efficiency, thereby improving the temperature regulation efficiency of the thermal management unit on the battery monomers.

[0003] However, in the related art, due to the limitation of the structure of the battery device, during the assembly of the battery device, a single heat exchange plate and a single battery monomer group are first combined into a unit, a single flow collecting pipe is connected to the end of the heat exchange plate by a tool, and then a unit composed of a single heat exchange plate and a single battery monomer group is connected again, the next flow collecting pipe is connected to the end of the heat exchange plate by a tool, and the process is repeated to complete the installation of the battery monomer group and the thermal management unit at the module level. The assembly process is extremely cumbersome, the assembly time is long, and the assembly efficiency is low.

[0004] Therefore, how to optimize the structure of the battery device to improve the assembly efficiency of the battery device is a technical problem to be solved. SUMMARY

[0005] In view of the above problems, the present application provides a battery device which has a simple assembly process, is easy to assemble, and has high assembly efficiency.

[0006] In a first aspect, the present application provides a battery device, comprising a box body and a battery monomer assembly, the battery monomer assembly is arranged in the box body and comprises a thermal management unit and at least one battery monomer group, each battery monomer group comprises at least one battery monomer, the thermal management unit comprises a flow collecting component and a plurality of heat exchange components, the plurality of heat exchange components are arranged in a first direction, and each adjacent two heat exchange components are provided with the battery monomer group, the battery monomer group is in thermal conductive connection with the heat exchange component, the flow collecting component is located on at least one side of the battery monomer group along a second direction, and the second direction intersects the first direction; the end of the heat exchange component along the second direction is a heat exchange end, the heat exchange end is provided with a through hole, the through hole penetrates the heat exchange end along the first direction, the flow collecting component is arranged in the through hole, the heat exchange component has a heat exchange flow channel for the flow of a heat exchange medium, the flow collecting component has a flow collecting channel for the flow of the heat exchange medium, and the heat exchange flow channel and the flow collecting channel are in communication.

[0007] In the technical solution described above, by arranging the heat management unit to include the current collecting component and the plurality of heat exchange components, and arranging the battery cell group between two adjacent heat exchange components, heat exchange can be performed between the two sides of each battery cell group and the heat exchange components, and the temperature regulation efficiency of the battery cell can be improved; by arranging the heat exchange end of the heat exchange component with the through hole, the through hole penetrates the heat exchange end along the first direction, and the current collecting component is arranged in the through hole, the current collecting component and the heat exchange component of the heat management unit can be pre-connected, so that when assembling the battery device, the heat management unit can be assembled first, and then the battery cell group and the heat exchange component are connected, and the assembly efficiency of the battery device can be improved.

[0008] When assembling the battery device, the current collecting component can be sequentially inserted through the through holes of the plurality of heat exchange components, and by sliding the heat exchange components along the current collecting component and along the first direction during assembly, the distance between the two adjacent heat exchange components can be adjusted, the battery cell group can be easily inserted into the accommodation space between the two adjacent heat exchange components, and the heat exchange component and the battery cell group can be easily pressed and connected in the second direction. The heat exchange component is assembled by sliding along the current collecting component, which is different from the related art in which a plurality of heat exchange components are respectively connected to a plurality of current collecting pipes. The process of connecting the plurality of heat exchange components to the plurality of current collecting pipes is omitted, and the number of components is reduced, mainly the number of current collecting components is reduced. The assembly process is simple and convenient, which can improve the assembly efficiency of the battery cell assembly. The assembled battery cell assembly can be boxed as a whole, thereby improving the assembly efficiency of the battery device and shortening the assembly time.

[0009] In some embodiments, a sealing member is arranged between the inner peripheral wall of the through hole and the outer peripheral wall of the current collecting component.

[0010] In the technical solution described above, by arranging the sealing member between the inner peripheral wall of the through hole and the outer peripheral wall of the current collecting component, the sealing member can seal the assembly gap between the current collecting component and the through hole.

[0011] In some embodiments, the sealing member is fixed to the heat exchange end and abuts against the outer peripheral wall of the current collecting component.

[0012] In the technical solution, the sealing member is fixed to the heat exchange end part, so that the sealing member is integrated on the heat exchange part. When the heat exchange part is assembled with the current collecting part, the whole formed by the heat exchange part and the sealing member is assembled with the current collecting part, so that the assembly process is reduced and the assembly efficiency is improved. In addition, the connection between the heat exchange end part and the sealing member is more reliable. The sealing member is in abutment with the outer peripheral wall of the current collecting part, so that the assembly gap between the sealing member and the heat exchange end part is reduced, and the sealing performance between the current collecting part and the heat exchange end part is further improved.

[0013] In some embodiments, the sealing member is adhesively fixed to the heat exchange end part.

[0014] In the technical solution, the sealing member is adhesively fixed to the heat exchange end part, so that the connection between the sealing member and the heat exchange part is more reliable and stable, and the assembly gap between the sealing member and the heat exchange part is further reduced, and the sealing performance between the current collecting part and the heat exchange end part is further improved.

[0015] In some embodiments, the inner peripheral wall of the through hole is provided with a fixing groove, and part of the sealing member is accommodated in the fixing groove.

[0016] In the technical solution, the inner wall of the through hole is provided with a fixing groove, and part of the sealing member is accommodated in the fixing groove, so that the connection between the sealing member and the heat exchange part is more reliable and stable, the risk of sealing failure caused by disconnection between the sealing member and the heat exchange part is reduced, and the reliability of the whole battery device is improved.

[0017] In some embodiments, the outer peripheral wall of the current collecting part is provided with a positioning groove, and part of the sealing member is accommodated in the positioning groove.

[0018] In the technical solution, the outer peripheral wall of the current collecting part is provided with a positioning groove, and part of the sealing member is accommodated in the positioning groove, so that the connection between the sealing member and the current collecting part is more reliable and stable, the risk of sealing failure caused by disconnection between the sealing member and the current collecting part is reduced, and the reliability of the whole battery device is improved. In addition, the positioning groove can play a positioning role on the sealing member, so as to play a positioning role on the heat exchange part. During the assembly of the battery monomer assembly, the heat exchange part is moved in the first direction. When the sealing member is accommodated in the positioning groove, it indicates that the heat exchange part is installed in place, and the assembly efficiency is improved.

[0019] In some embodiments, the sealing member is an annular ring arranged around the current collecting part.

[0020] In the technical scheme, the sealing member is annular around the current collecting component, the sealing member can better seal the assembly gap between the heat exchange component and the current collecting component in the circumferential direction, and the sealing performance between the heat exchange component and the current collecting component is further improved; and the connection between the current collecting component and the sealing member is more stable and reliable.

[0021] In some embodiments, the radial section of the sealing member is circular, and the radial section of the sealing member is perpendicular to the axial direction of the sealing member.

[0022] In the technical scheme, the radial section of the sealing member is circular, in the process of assembling the battery monomer assembly, the heat exchange component is moved in the first direction, when the sealing member contacts the current collecting component, the sealing member is compressed in the radial direction and elastically deformed, the heat exchange component can be more easily slid relative to the current collecting component in the first direction, the sliding resistance is appropriately reduced, and the assembly difficulty is reduced.

[0023] In some embodiments, the inner circumferential wall of the through hole is provided with a fixing groove, the fixing groove is annular around the current collecting component, and part of the sealing member is accommodated in the fixing groove.

[0024] In the technical scheme, the fixing groove is annular around the current collecting component, and part of the sealing member is accommodated in the fixing groove, the sealing member can be connected with the fixing groove in the circumferential direction, the contact area between the sealing member and the heat exchange end is increased, the connection between the sealing member and the heat exchange end is more reliable and stable, the risk of sealing failure caused by disconnection between the sealing member and the heat exchange component is reduced, and the overall reliability of the battery device is improved.

[0025] In some embodiments, the outer circumferential wall of the current collecting component is provided with a positioning groove, the positioning groove is annular around the current collecting component, and part of the sealing member is accommodated in the positioning groove.

[0026] In the technical scheme, the positioning groove is annular around the current collecting component, and part of the sealing member is accommodated in the positioning groove, the sealing member can be fixedly connected with the current collecting component in the circumferential direction, the contact area between the sealing member and the current collecting component is increased, the connection between the sealing member and the current collecting component is more reliable and stable, the risk of sealing failure caused by disconnection between the sealing member and the current collecting component is reduced, and the overall reliability of the battery device is improved. In addition, the positioning groove can position the sealing member, thereby positioning the heat exchange component, in the process of assembling the battery monomer assembly, the heat exchange component is moved in the first direction, when the sealing member is accommodated in the positioning groove, it indicates that the heat exchange component is installed in place, and the assembly efficiency is improved.

[0027] In some embodiments, the peripheral wall of the current collecting component is provided with a communication hole, the communication hole communicates the current collecting channel and the heat exchange flow channel, two of the sealing members are arranged between each of the heat exchange end portions and the current collecting component, and the two sealing members are located on two sides of the communication hole along the first direction.

[0028] In the technical solution described above, by providing the peripheral wall of the current collecting component with a communication hole and by making the communication hole communicate the current collecting channel and the heat exchange flow channel, the heat exchange medium located in the current collecting channel can enter the heat exchange flow channel through the communication hole to exchange heat with the battery monomer, and the heat exchange medium in the heat exchange flow channel after exchanging heat with the battery monomer can also enter the current collecting channel through the communication hole. Since the cooling medium flows between the current collecting channel and the heat exchange flow channel through the communication hole, by providing two sealing members between each of the heat exchange end portions and the current collecting component and by making the two sealing members located on two sides of the communication hole along the first direction, the two sealing members can sufficiently seal the part near the communication hole, and the two sides of the communication hole along the first direction can be sealed by the sealing members, so that the assembly of the current collecting component and the heat exchange component can be better sealed.

[0029] In some embodiments, the sealing member is a polymer elastomer.

[0030] In the technical solution described above, by making the sealing member a polymer elastomer, the sealing member can have good flexibility and elastic deformation capability, the heat exchange component can more easily slide relative to the current collecting component along the first direction, the sliding resistance can be appropriately reduced, and the assembly difficulty can be reduced; in addition, the sealing member can better seal the assembly between the current collecting component and the heat exchange end portion.

[0031] In some embodiments, the heat exchange end portion includes an end portion body and a sealing flange, the sealing flange is connected to at least one side of the end portion body along the first direction, a part of the through hole is formed in the end portion body, and the sealing flange is arranged around the current collecting component and surrounds another part of the through hole.

[0032] In the technical solution described above, by making the heat exchange end portion include a sealing flange, the sealing flange is connected to at least one side of the end portion body along the first direction, and the sealing flange surrounds another part of the through hole, the sealing flange can increase the contact area between the heat exchange end portion and the current collecting component, more fully increase the sealing effect between the heat exchange end portion and the current collecting component, and the sealing flange provides a larger installation space for the sealing member, so that the sealing member can more easily be connected with the heat exchange end portion.

[0033] In some embodiments, at least part of the sealing member is located between the inner peripheral wall of the sealing flange and the outer peripheral wall of the current collecting component.

[0034] In the technical solution, the sealing member is located between the inner peripheral wall of the sealing flange and the outer peripheral wall of the current collecting component, so that the sealing member can seal the assembly gap between the sealing flange and the current collecting component better; and the sealing flange provides a larger mounting space for the sealing member, so that the sealing member can be connected to the heat exchange end more easily and the communication hole is not blocked.

[0035] In some embodiments, a sealing glue is arranged between the inner peripheral wall of the sealing flange and the outer peripheral wall of the current collecting component, and the sealing glue is arranged around the current collecting component and on the side of the sealing member away from the end body.

[0036] In the technical solution, the sealing glue is arranged between the inner peripheral wall of the sealing flange and the outer peripheral wall of the current collecting component, so that the assembly gap between the flexible connecting member and the current collecting component is reduced or avoided, and the sealing performance between the sealing flange and the current collecting component is further improved; in addition, the connection between the sealing flange and the current collecting component is more reliable.

[0037] In some embodiments, the outer peripheral wall of the sealing flange is sleeved with a clamp or wrapped with a cable tie.

[0038] In the technical solution, the outer peripheral wall of the sealing flange is sleeved with a clamp or wrapped with a cable tie, so that the connection between the sealing flange and the current collecting component is more reliable, and the heat exchange component is prevented from sliding in the first direction again after being installed in place, so that the heat exchange medium cannot flow between the heat exchange component and the current collecting component through the communication hole, and the reliability of the heat management unit as a whole is improved.

[0039] In some embodiments, the current collecting component is an integrally formed member.

[0040] In the technical solution, the current collecting component is an integrally formed member, so that the step of connecting and installing multiple current collecting components in the related art is omitted, the number of parts of the battery monomer assembly as a whole is reduced, and the installation efficiency of the battery monomer assembly is improved.

[0041] In some embodiments, the cross section of the current collecting component is a circular ring.

[0042] In the technical solution, the cross section of the current collecting component is a circular ring, so that the cross section of the current collecting channel is circular, the corners in the current collecting channel are reduced, the flow resistance of the heat exchange medium in the current collecting channel is reduced, the flow speed of the heat exchange medium is improved, and the heat exchange efficiency is improved.

[0043] In some embodiments, in the first direction, the flow area of the current collecting channel is consistent.

[0044] In the technical solution, the flow area of the current collection channel in the first direction is consistent, and the heat exchange medium in the current collection channel flows in the first direction, so that the heat exchange medium in the current collection channel is less blocked during flow, the flow resistance of the heat exchange medium in the current collection channel is reduced, the flow speed of the heat exchange medium is improved, and the heat exchange efficiency is improved.

[0045] In some embodiments, the current collection components are two, and the two current collection components are arranged on both sides of the battery monomer groups along the second direction. Each of the heat exchange components has the heat exchange end portion at both ends along the second direction. The current collection components on the same side in the second direction are arranged in the through holes of the corresponding heat exchange end portions. One of the current collection components is provided with a current collection inlet, and the other current collection component is provided with a current collection outlet.

[0046] In the technical solution, the current collection components are arranged to include two groups of current collection component groups, and the two groups of current collection component groups are arranged on both sides of the battery monomer groups along the second direction. In this way, the arrangement of the current collection components is facilitated, and the flow channel in the heat management unit is arranged simply. The heat exchange medium flows into one of the groups of current collection component groups through the current collection inlet and flows into the heat exchange flow channels of the plurality of heat exchange components. The heat exchange medium flowing through the plurality of heat exchange components flows into the other group of current collection component groups and flows out from the current collection outlet.

[0047] In some embodiments, along the first direction, the side of the heat exchange component facing the battery monomer group is provided with a heat-conducting adhesive layer.

[0048] In the technical solution, the heat-conducting adhesive layer is arranged on the side of the heat exchange component facing the battery monomer group. After the battery monomer group is inserted into the adjacent two heat exchange components, the heat exchange components and the battery monomer group are slid and pressed along the first direction, so that the battery monomer group and the adjacent heat exchange components are fixed as a whole through the heat-conducting adhesive layer.

[0049] In some embodiments, along the first direction, the side of the heat exchange component facing the battery monomer group is provided with a heat-conducting adhesive layer.

[0050] In the technical solution, the heat-conducting adhesive layer is arranged on the side of the heat exchange component facing the battery monomer group. After the battery monomer group is inserted into the adjacent two heat exchange components, the heat exchange components and the battery monomer group are slid and pressed along the first direction, so that the battery monomer group and the adjacent heat exchange components are fixed as a whole through the heat-conducting adhesive layer.

[0051] In some embodiments, each group of battery monomer groups includes a plurality of battery monomers, and the plurality of battery monomers in each group of battery monomer groups are connected as a whole.

[0052] In the technical solution described above, by connecting the plurality of battery monomers in each battery monomer group into a whole, when the battery monomer group is inserted between two adjacent heat exchange components, the battery monomer group can be connected into a whole first, so that the battery monomer group can be inserted as a whole between the two heat exchange components, making the operation of inserting the battery monomer group between the two adjacent heat exchange components simpler and more convenient, and improving the assembly efficiency.

[0053] In some embodiments, the plurality of battery monomers in each battery monomer group are arranged along a second direction.

[0054] In the technical solution described above, by arranging the plurality of battery monomers in the battery monomer group along a second direction, each battery monomer in the battery monomer group can be in thermal conduction connection with the heat exchange components on both sides, so that the thermal conduction area of each battery monomer with the heat exchange components is larger, and the temperature regulation efficiency for the battery monomers can be better improved.

[0055] In a second aspect, the application provides an assembly method of a battery device, the battery device being the battery device according to the first aspect of the application, and the assembly method comprising: sequentially threading the current collecting component along a first direction through the heat exchange end portions of a plurality of heat exchange components, the plurality of heat exchange components being sequentially the first to Nth heat exchange components along the first direction, N≥2 and being an integer; sliding the first heat exchange component along the first direction to a first preset position and fixing it at the first preset position; sliding the second heat exchange component along the first direction relative to the current collecting component to avoid a containing space for accommodating the battery monomer group; placing the first group of battery monomer groups between the first heat exchange component and the second heat exchange component, and connecting and fixing the first group of battery monomer groups with the first heat exchange component; sliding the second heat exchange component along the first direction to a second preset position and fixing it at the second preset position, and connecting and fixing the first group of battery monomer groups with the second heat exchange component; sliding the third heat exchange component along the first direction relative to the current collecting component to avoid a containing space for accommodating the battery monomer group; placing the second group of battery monomer groups between the second heat exchange component and the third heat exchange component, and connecting and fixing the second group of battery monomer groups with the second heat exchange component; sliding the third heat exchange component along the first direction to a third preset position and fixing the third heat exchange component at the third preset position, and connecting and fixing the second group of battery monomer groups and the third heat exchange component; By analogy, until the N-1th group of battery monomer groups and the corresponding heat exchange component are assembled, thereby assembling the battery monomer assembly. Assembling the battery monomer assembly into the box.

[0056] In the above technical solution, when assembling the battery device, the current collecting component can be sequentially inserted through the penetrating holes of the plurality of heat exchange components. In the assembly process, the heat exchange components are slid along the current collecting component and in the first direction, so that the distance between the adjacent two heat exchange components can be adjusted. The battery monomer group can be inserted into the accommodation space between the adjacent two heat exchange components, and the heat exchange component and the battery monomer group can be pressed and connected in the second direction. The heat exchange component is assembled by sliding along the current collecting component. Compared with the related art in which a plurality of heat exchange components are respectively connected to a plurality of current collecting pipes, the process of connecting the plurality of heat exchange components to the plurality of current collecting pipes is omitted, and the number of components is reduced. The number of current collecting components is mainly reduced. The assembly process is simple and convenient. This can improve the assembly efficiency of the battery monomer assembly. The assembled battery monomer assembly can be put into the box as a whole. Therefore, the assembly efficiency of the battery device can be improved, and the assembly time can be shortened.

[0057] In a third aspect, the application provides a power utilization device, which comprises the battery device according to the second aspect of the application.

[0058] In the above technical solution, the power utilization device is provided with the battery device, which has high temperature regulation efficiency and high assembly efficiency.

[0059] Additional aspects and advantages of the application will be set forth in part in the description which follows, and in part will become apparent to those skilled in the art upon examination of the following and / or by practice of the application. BRIEF DESCRIPTION OF DRAWINGS

[0060] The above and / or additional aspects and advantages of the application will become apparent and be readily appreciated from the following description, including the appended drawings, wherein: Figure 1 is a schematic diagram of a battery device according to some embodiments of the application; Figure 2 is a schematic diagram of a battery device according to some embodiments of the application; Figure 1 is a perspective view of a battery monomer assembly in Figure 3 is an enlarged view of A in Figure 1 Figure 4 is an enlarged view of A in Figure 1 ​front view of the thermal management unit in the battery module assembly; Figure 5 is Figure 4 partial sectional view along the line B-B in the battery module assembly; Figure 6 is Figure 4 side view of the thermal management unit in the battery module assembly; Figure 7 is Figure 4 front view of the thermal management unit in the battery module assembly during installation of the battery monobloc, wherein the first heat exchange component of the thermal management unit is located at the first preset position; Figure 8 is Figure 7 enlarged view at C in the battery module assembly; Figure 9 is Figure 7 side view of the thermal management unit in the battery module assembly; Figure 10 is a schematic view of the insertion process of the battery monobloc into the adjacent heat exchange components according to some embodiments of the present application; Figure 11 is Figure 1 side view of the battery module assembly in the battery module assembly; Figure 12 is a schematic view of the in-box process of the battery module assembly into the box according to some embodiments of the present application; Figure 13 is a schematic view of the electrical device according to some embodiments of the present application.

[0061] Reference Signs: 1000, electrical device; 100, battery device; 11, box; 101, second box; 10, battery monobloc assembly; 20, thermal management unit; 201, containing space; 21, blocking cap; 30, heat exchange component; 31, heat exchange end portion; 312, end portion body; 313, sealing flange; 32, through hole; 33, fixing groove; 40, current collecting component; 41, set of positioning grooves; 411, positioning groove; 42, current collecting channel; 43, communication hole; 44, current collecting inlet; 45, current collecting outlet; 50, sealing member; 60, battery monobloc; 61, battery monobloc; 200, vehicle body. DETAILED DESCRIPTION

[0062] In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the following will clearly describe the technical solutions in the embodiments of the present application with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some but not all of the embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by a person of ordinary skill in the art without creative effort belong to the scope of the present application.

[0063] 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 in the specification of the present application is only for the purpose of describing specific embodiments and is not intended to limit the present application; the terms "comprise" and "have" and any variations thereof in the specification and claims of the present application and the above description of drawings are intended to cover non-exclusive inclusion. The terms "first", "second" and the like in the specification and claims of the present application or the above description of drawings are used to distinguish different objects, not to describe a specific order or primary and secondary relationship.

[0064] In the present application, the term "embodiment" means that the specific features, structures or properties described in conjunction with the embodiment can be included in at least one embodiment of the present application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment to other embodiments.

[0065] In the description of the present application, it should be noted that, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection", "attachment" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be directly connected, or indirectly connected through an intermediate medium; it can be the communication inside two elements. For those of ordinary skill in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0066] In the present application, the term "and / or" is only a description of the association relationship between the associated objects, which means that there can be three relationships, for example, A and / or B can mean that A exists alone, A and B exist together, and B exists alone. In addition, the character " / " in the present application generally represents a "or" relationship between the front and rear associated objects.

[0067] In the embodiments of the present application, the same reference signs represent the same parts, and for the sake of brevity, detailed description of the same parts is omitted in different embodiments. It should be understood that the thickness, length, width and other dimensions of various components in the embodiments of the present application shown in the drawings, as well as the overall thickness, length, width and other dimensions of the integrated device, are only exemplary and should not constitute any limitation on the present application.

[0068] The "plurality" appearing in the present application refers to two or more (including two).

[0069] In the embodiments of the present application, all the embodiments and optional embodiments of the present application can be combined with each other to form new technical solutions, if not particularly stated.

[0070] In the embodiments of the present application, all the technical features and optional technical features of the present application can be combined with each other to form new technical solutions, if not particularly stated.

[0071] In the embodiments of the present application, the battery apparatus 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. For example, the battery cell assembly is usually formed by arranging a plurality of battery cells; the battery cell assembly can be a battery module formed by arranging and fixing a plurality of battery cells into an independent module. As an example, the battery module can be formed by bundling a plurality of battery cells with a cable tie.

[0072] The battery apparatus can be a battery pack including a box and one or more battery cell assemblies accommodated in the box. The battery cell assembly can be a battery module, which can be accommodated in the box by fixing the battery module in the box; the battery cell assembly can also be accommodated in the box by directly fixing a plurality of battery cells in the box.

[0073] In the embodiments of the present application, the box can include a first box and a second box. The first box and the second box are buckled to form a closed space inside the box to accommodate the battery cell assembly. Here, closed means covered or closed, which can be sealed or unsealed. The first box can be a top cover or a bottom plate. For example, the box can include a top cover, a frame, and a bottom plate. The top cover and the bottom plate are respectively connected with the frame, so that the box forms a closed space inside to accommodate the battery cell assembly.

[0074] In the embodiments of the present application, the box can be part of the chassis structure of the vehicle. For example, part of the box can be at least part of the floor of the vehicle, or part of the box can be at least part of the cross beam and the longitudinal beam of the vehicle.

[0075] In the embodiments of the present application, the battery cell can be a secondary battery, which refers to a battery cell that can be used continuously by activating the active material through charging after the battery cell is discharged; the battery cell can be a lithium ion battery, a sodium ion battery, a sodium lithium ion battery, a lithium metal battery, a sodium metal battery, a lithium-sulfur battery, a magnesium ion battery, a nickel-hydrogen battery, a nickel-cadmium battery, a lead-acid battery, etc., and the embodiments of the present application are not limited thereto. The battery cell can be in the shape of a cylinder, a flat body, a cuboid or other shapes, and the embodiments of the present application are not limited thereto. The battery cell is generally divided into three types according to the packaging method: cylindrical battery cells, square battery cells and soft package battery cells, and the embodiments of the present application are not limited thereto.

[0076] The battery cell, as the smallest energy unit of the battery device, includes a case and an electrode assembly disposed in the case. The electrode assembly is a component in which an electrochemical reaction occurs in the battery cell. One or more electrode assemblies can be contained in the case. The electrode assembly is mainly formed by winding or stacking a positive electrode sheet and a negative electrode sheet, and a separator is generally provided between the positive electrode sheet and the negative electrode sheet. The positive electrode sheet and the negative electrode sheet each have a portion with an active material constituting a main body of the electrode assembly, and a portion without the active material constituting a tab.

[0077] The positive electrode sheet can include a positive electrode current collector and a positive electrode film layer disposed on at least one surface of the positive electrode current collector, the positive electrode film layer including a positive electrode active material.

[0078] As an example, the positive electrode current collector has two surfaces opposite in the thickness direction thereof, and the positive electrode film layer is disposed on any one or both of the two opposite surfaces of the positive electrode current collector.

[0079] As an example, the positive electrode current collector can be a metal foil or a composite current collector.

[0080] The negative electrode sheet can include a negative electrode current collector and a negative electrode film layer disposed on at least one surface of the negative electrode current collector, the negative electrode film layer including a negative electrode active material.

[0081] As an example, the negative electrode current collector has two surfaces opposite in the thickness direction thereof, and the negative electrode film layer is disposed on any one or both of the two opposite surfaces of the negative electrode current collector.

[0082] As an example, the negative electrode current collector can be a metal foil, a foam metal or a composite current collector.

[0083] At present, from the development of market situation, the application of battery is more and more extensive. The battery is not only applied to the energy storage power supply system of hydropower, thermal power, wind power and solar power station, but also widely applied to electric bicycles, electric motorcycles, electric vehicles and other electric vehicles, and aerospace and other fields. With the continuous expansion of the application field of power battery, the market demand is also increasing.

[0084] In the related art, a heat management unit is arranged in a battery device for temperature regulation of battery monomers. In order to increase the temperature regulation efficiency of the heat management unit on the battery monomers, the heat management unit is arranged to include a plurality of heat exchange plates and a plurality of manifold pipes, each adjacent two heat exchange plates are connected by a manifold pipe, and the heat exchange plate and the manifold pipe are connected in a butt joint, and the battery monomer group is arranged between the adjacent heat exchange plates to improve the heat exchange efficiency, so as to improve the temperature regulation efficiency of the heat management unit on the battery monomers.

[0085] However, in the related art, due to the limitation of the structure of the battery device, during the assembly of the battery device, a single heat exchange plate and a single battery monomer group are first combined into a unit, a single manifold pipe is connected to the end of the heat exchange plate by a tool, and then a unit composed of a single heat exchange plate and a single battery monomer group is connected again, the next manifold pipe is connected to the end of the heat exchange plate by a tool, and the process is repeated to complete the installation of the battery monomer group and the heat management unit at the module level. The assembly process is extremely cumbersome, the assembly time is long, and the assembly efficiency is low.

[0086] Therefore, how to optimize the structure of the battery device to improve the assembly efficiency of the battery device is a technical problem to be solved.

[0087] Therefore, how to optimize the structure of the battery device to improve the assembly efficiency of the battery device is a technical problem to be solved.

[0088] The battery device can make the two sides of each battery cell group exchange heat with the heat exchange components, and can improve the temperature regulation efficiency of the battery cell; the heat exchange end of the heat exchange component is provided with a penetrating hole, the penetrating hole penetrates the heat exchange end along the first direction, and the current collecting component is penetrated in the penetrating hole, so that the current collecting component of the heat management unit and the heat exchange component are connected in advance, so that when assembling the battery device, the heat management unit can be assembled first, and then the battery cell group and the heat exchange component are connected, which can improve the assembly efficiency of the battery device.

[0089] When assembling the battery device, the current collecting component can be sequentially penetrated through the penetrating holes of the plurality of heat exchange components, and the heat exchange components are slid along the current collecting component and along the first direction during assembly, so that the distance between the two adjacent heat exchange components can be adjusted, the battery cell group can be inserted into the accommodating space between the two adjacent heat exchange components, and the heat exchange component and the battery cell group can be pressed and connected in the second direction. The heat exchange component is assembled by sliding along the current collecting component, which is different from the related art in which a plurality of heat exchange components are respectively connected to a plurality of current collecting pipes. The number of components is reduced, mainly the number of current collecting components is reduced. The assembly process is simple and convenient, which can improve the assembly efficiency of the battery cell assembly. The assembled battery cell assembly can be boxed as a whole, thereby improving the assembly efficiency of the battery device and shortening the assembly time.

[0090] The battery device can be used as a power supply for a variety of energy storage systems using the battery device as an energy storage element. The battery device can be used in vehicles, but not limited to mobile phones, tablets, laptops, electric toys, power tools, electric cars, electric cars, ships, spacecraft, etc. Among them, electric toys can include fixed or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric plane toys, etc. Spacecraft can include airplanes, rockets, space shuttles, and spacecraft, etc.

[0091] The power utilization device disclosed in the embodiments of the present application can be a fuel automobile, a gas automobile or a new energy automobile, and the new energy automobile can be a pure electric automobile, a hybrid automobile or a range extended automobile, etc. The vehicle is internally provided with a battery device, which can be arranged at the bottom, the head or the tail of the vehicle. The battery device can be used for power supply of the vehicle, for example, the battery device can be used as an operating power source of the vehicle. The vehicle can further include a controller and a motor, and the controller is used to control the battery device to supply power to the motor, for example, to meet the working power demand of the vehicle during starting, navigation and driving. In some embodiments of the present application, the battery device can not only be used as an operating power source of the vehicle, but also be used as a driving power source of the vehicle, to replace or partially replace fuel or natural gas to provide driving power for the vehicle.

[0092] Reference will be made to Figures 1-13 The battery device according to the embodiments of the present application is described.

[0093] Reference Figures 1-5 In a first aspect, the present application provides a battery device 100, comprising a box body 11 and a battery monomer assembly 10, the battery monomer assembly 10 is arranged in the box body 11 and comprises a heat management unit 20 and at least one battery monomer group 60, each battery monomer group 60 comprises at least one battery monomer 61, the heat management unit 20 comprises a current collecting component 40 and a plurality of heat exchange components 30, the plurality of heat exchange components 30 are arranged in a first direction, and each adjacent two heat exchange components 30 are provided with a battery monomer group 60, the battery monomer group 60 is in thermal conductive connection with the heat exchange component 30, and the current collecting component 40 is located on at least one side of the battery monomer group 60 in a second direction, and the second direction intersects the first direction.

[0094] The end of the heat exchange component 30 in the second direction is a heat exchange end 31, the heat exchange end 31 is provided with a through hole 32, the through hole 32 penetrates the heat exchange end 31 in the first direction, the current collecting component 40 is arranged in the through hole 32, the heat exchange component 30 has a heat exchange flow channel for heat exchange medium flow, and the current collecting component 40 has a current collecting channel 42 for heat exchange medium flow, and the heat exchange flow channel and the current collecting channel 42 are in communication.

[0095] For example, the first direction can refer to the e1 direction in the drawings, and the second direction can refer to the e2 direction in the drawings. The first direction can be the length direction of the battery device 100, and the second direction can be the width direction of the battery device 100.

[0096] Each battery monomer group 60 comprises at least one battery monomer 61, which can include the following cases: for example, each battery monomer group 60 can include one battery monomer 61; each battery monomer group 60 can also include a plurality of battery monomers 61.

[0097] The heat management unit 20 is configured to adjust the temperature of the battery cells 61. The heat management unit 20 can increase the temperature of the battery cells 61, or decrease the temperature of the battery cells 61. For example, when the ambient temperature is relatively low, the heat management unit 20 can increase the temperature of the battery cells 61. When the ambient temperature is relatively high, the heat management unit 20 can decrease the temperature of the battery cells 61, so as to timely take away the heat generated by the battery cells 61 during operation, and avoid the temperature of the battery cells 61 being too high.

[0098] At least a main part of the heat exchange component 30 can be a heat conductive member. For example, the main part of the heat exchange component 30 can be a metal member, such as an aluminum member or a copper member or a steel member. The main part of the heat exchange component 30 refers to the part of the heat exchange component 30 located between adjacent battery cell groups 60.

[0099] For example, the heat exchange component 30 can have a plate-like structure, so that the contact area between the heat exchange component 30 and the battery cells 61 is relatively large.

[0100] For example, the battery cells 61 can be square-shaped battery cells, and the large faces of the battery cells 61 can be in heat conductive connection with the heat exchange component 30.

[0101] The current collecting component 40 can be a metal member, such as an aluminum member or a steel member or a copper member. The current collecting component 40 can also be a non-metal member, such as an engineering plastic member. The current collecting component 40 can be formed in a tubular shape and extend along the first direction. For example, the cross section of the current collecting component 40 can be circular, and the cross section of the current collecting component 40 is perpendicular to the first direction.

[0102] When the heat management unit 20 is in operation, the heat exchange medium can enter the current collecting channel 42 of the current collecting component 40, and the heat exchange medium entering the current collecting channel 42 flows into the heat exchange flow channels of the plurality of heat exchange components 30, respectively. The heat exchange medium can exchange heat with the battery cells 61 when flowing through the heat exchange flow channels, so as to adjust the temperature of the battery cells 61. The heat exchange medium flowing through the heat exchange flow channels is collected in the current collecting channel 42 of the current collecting component 40, and then discharged.

[0103] For example, the heat exchange medium can include water, ethylene glycol, etc.

[0104] The current collecting component 40 is located at least one side of the battery monomer group 60 along the second direction, which can include the following cases: both of the above-mentioned current collecting components 40 are located at one side of the battery monomer group 60 along the second direction, at this time, the heat exchange component 30 has a heat exchange end 31 at one end along the second direction, and the heat exchange inlet and the heat exchange outlet are formed on the heat exchange end 31 and are separated from each other; or both of the above-mentioned current collecting components 40 are located at both sides of the battery monomer group 60 along the second direction, at this time, the heat exchange component 30 has a heat exchange end 31 at both ends along the second direction, the heat exchange inlet is formed on the heat exchange end 31 at one end of the heat exchange component 30 along the second direction, and the heat exchange outlet is formed on the heat exchange end 31 at the other end of the heat exchange component 30 along the second direction.

[0105] Since the heat exchange end 31 is provided with the penetrating hole 32 and the current collecting component 40 penetrates the penetrating hole 32, the heat exchange component 30 can slide along the first direction relative to the current collecting component 40, so that the distance between the adjacent two heat exchange components 30 can be adjusted or changed.

[0106] In the above technical solution, by setting the heat management unit 20 to include the current collecting component 40 and the plurality of heat exchange components 30, and arranging the battery monomer group 60 between the adjacent two heat exchange components 30, the two sides of each battery monomer group 60 can be heat exchanged with the heat exchange component 30, which can improve the temperature regulation efficiency of the battery monomer 61; by providing the heat exchange end 31 of the heat exchange component 30 with the penetrating hole 32, the penetrating hole 32 penetrates the heat exchange end 31 along the first direction, and the current collecting component 40 penetrates the penetrating hole 32, the current collecting component 40 of the heat management unit 20 and the heat exchange component 30 can be connected in advance, so that when assembling the battery device 100, the heat management unit 20 can be assembled first, and then the battery monomer group 60 is connected with the heat exchange component 30, which can improve the assembly efficiency of the battery device 100.

[0107] In the process of assembling the battery device 100, the current collecting member 40 can be sequentially inserted through the plurality of through holes 32 of the plurality of heat exchange members 30. In the process of assembly, the heat exchange members 30 can be slid along the current collecting member 40 and in the first direction, so as to adjust the spacing between two adjacent heat exchange members 30. The battery monomer group 60 can be inserted into the accommodation space 201 between the two adjacent heat exchange members 30, and the heat exchange member 30 and the battery monomer group 60 can be pressed and connected in the second direction. The heat exchange member 30 is assembled by sliding along the current collecting member 40. Compared with the related art in which the plurality of heat exchange members 30 are respectively connected to the plurality of current collecting tubes, the process of connecting the plurality of heat exchange members 30 to the plurality of current collecting tubes is omitted, and the number of components is reduced, mainly the number of current collecting members 40 is reduced. The assembly process is simple and convenient, which can improve the assembly efficiency of the battery monomer assembly 10. The assembled battery monomer assembly 10 can be boxed as a whole, thereby improving the assembly efficiency of the battery device 100 and shortening the assembly time.

[0108] Referring to Figure 5 In some embodiments, the sealing member 50 is arranged between the inner circumferential wall of the through hole 32 and the outer circumferential wall of the current collecting member 40.

[0109] For example, the sealing member 50 can be a plastic member or a rubber member or a silica gel member.

[0110] In the above technical solution, the sealing member 50 is arranged between the inner circumferential wall of the through hole 32 and the outer circumferential wall of the current collecting member 40. The sealing member 50 can seal the assembly gap between the current collecting member 40 and the through hole 32.

[0111] Referring to Figure 5 In some embodiments, the sealing member 50 is fixed to the heat exchange end 31 and abuts against the outer circumferential wall of the current collecting member 40.

[0112] The sealing member 50 is fixed to the heat exchange end 31. The sealing member 50 and the heat exchange end 31 can be connected by clamping, the sealing member 50 can be integrally injection molded on the heat exchange end 31, or the sealing member 50 can be connected to the heat exchange end 31 by gluing.

[0113] In the technical solution, the sealing member 50 is fixed to the heat exchange end 31, so that the sealing member 50 is integrated on the heat exchange component 30. When the heat exchange component 30 is assembled with the current collecting component 40, the heat exchange component 30 and the sealing member 50 are assembled with the current collecting component 40, thereby reducing the assembly process and improving the assembly efficiency. In addition, the connection between the heat exchange end 31 and the sealing member 50 is more reliable. The sealing member 50 is in abutment with the outer peripheral wall of the current collecting component 40, thereby reducing the assembly gap between the sealing member 50 and the heat exchange end 31 and further improving the sealing between the current collecting component 40 and the heat exchange end 31.

[0114] In some embodiments, the sealing member 50 is adhesively fixed to the heat exchange end 31.

[0115] For example, the sealing member 50 can be adhesively fixed to the heat exchange end 31 by sealing glue.

[0116] In the technical solution, the sealing member 50 is adhesively fixed to the heat exchange end 31, so that the connection between the sealing member 50 and the heat exchange component 30 is more reliable and stable, and the assembly gap between the sealing member 50 and the heat exchange component 30 is further reduced, thereby further improving the sealing between the current collecting component 40 and the heat exchange end 31.

[0117] Referring to Figure 5 In some embodiments, the inner peripheral wall of the through hole 32 is provided with a fixing groove 33, and part of the sealing member 50 is accommodated in the fixing groove 33.

[0118] For example, the inner peripheral wall of the through hole 32 is provided with a fixing groove 33, part of the sealing member 50 is accommodated in the fixing groove 33, and the sealing member 50 is adhesively fixed to the fixing groove 33.

[0119] In the technical solution, the inner wall of the through hole 32 is provided with a fixing groove 33, and part of the sealing member 50 is accommodated in the fixing groove 33, so that the connection between the sealing member 50 and the heat exchange component 30 is more reliable and stable, the risk of sealing failure caused by disconnection between the sealing member 50 and the heat exchange component 30 is reduced, and the reliability of the battery device 100 as a whole is improved.

[0120] Referring to Figures 5-10 In some embodiments, the outer peripheral wall of the current collecting component 40 is provided with a positioning groove 411, and part of the sealing member 50 is accommodated in the positioning groove 411.

[0121] For example, the inner peripheral wall of the through hole 32 is provided with a fixing groove 33, the outer peripheral wall of the current collecting component 40 is provided with a positioning groove 411, part of the sealing member 50 is accommodated in the fixing groove 33, and part of the sealing member 50 is accommodated in the positioning groove 411.

[0122] When the heat exchange component 30 is slid along the current collecting component 40 and in the first direction, the sealing member 50 is in abutment with the outer peripheral wall of the current collecting component 40, and the sealing member 50 is compressed and elastically deformed in the radial direction. When the heat exchange component 30 is slid in the first direction to the position of the positioning groove 411 on the current collecting component 40, the sealing member 50 expands under the action of its own elastic force and allows part of the sealing member 50 to be accommodated in the positioning groove 411.

[0123] In the technical solution described above, by providing the outer peripheral wall of the current collecting component 40 with the positioning groove 411 and accommodating part of the sealing member 50 in the positioning groove 411, the connection between the sealing member 50 and the current collecting component 40 can be more reliable and stable, the risk of seal failure caused by disconnection between the sealing member 50 and the current collecting component 40 can be reduced, and the reliability of the battery device 100 as a whole can be improved. Moreover, the positioning groove 411 can function as a positioning function for the sealing member 50, thereby functioning as a positioning function for the heat exchange component 30. During assembly of the battery monomer assembly 10, the heat exchange component 30 is moved in the first direction, and when the sealing member 50 is accommodated in the positioning groove 411, it indicates that the heat exchange component 30 is installed in place, thereby improving the assembly efficiency.

[0124] Referring to Figure 5 In some embodiments, the sealing member 50 is annular and arranged around the current collecting component 40.

[0125] For example, the cross section of the current collecting component 40 is circular, the inner peripheral wall of the through hole 32 is circular, and the sealing member 50 is annular and arranged around the current collecting component 40 and located in abutment with the inner peripheral wall of the through hole 32.

[0126] In the technical solution described above, by making the sealing member 50 annular and arranged around the current collecting component 40, the sealing member 50 can better seal the assembly gap between the heat exchange component 30 and the current collecting component 40 in the circumferential direction, thereby further improving the sealing between the heat exchange component 30 and the current collecting component 40; and the connection between the current collecting component 40 and the sealing member 50 can be more stable and reliable.

[0127] Referring to Figure 5 In some embodiments, the radial cross section of the sealing member 50 is circular, and the radial cross section of the sealing member 50 is perpendicular to the axial direction of the sealing member 50.

[0128] In the technical solution described above, by making the radial cross section of the sealing member 50 circular, during assembly of the battery monomer assembly 10, the heat exchange component 30 is moved in the first direction, and when the sealing member 50 is in contact with the current collecting component 40, the sealing member 50 is compressed in the radial direction and elastically deformed, which can make the heat exchange component 30 more easily slide relative to the current collecting component 40 in the first direction, appropriately reduce the sliding resistance, and reduce the assembly difficulty.

[0129] With reference to Figure 5 In some embodiments, the inner circumferential wall of the through hole 32 is provided with a fixing groove 33, the fixing groove 33 is annularly arranged around the current collecting component 40, and part of the sealing member 50 is accommodated in the fixing groove 33.

[0130] For example, the radial section of the sealing member 50 is circular, the inner circumferential wall of the through hole 32 is provided with the fixing groove 33, the fixing groove 33 is annularly arranged around the current collecting component 40, and the part of the sealing member 50 close to the wall of the through hole 32 in the radial direction is accommodated in the fixing groove 33.

[0131] In the above technical solution, by arranging the fixing groove 33 annularly around the current collecting component 40 and accommodating part of the sealing member 50 in the fixing groove 33, the sealing member 50 can be connected with the fixing groove 33 in the circumferential direction, the contact area between the sealing member 50 and the heat exchange end portion 31 is increased, the connection between the sealing member 50 and the heat exchange end portion 31 is more reliable and stable, the risk of sealing failure caused by disconnection between the sealing member 50 and the heat exchange component 30 is reduced, and the reliability of the battery device 100 as a whole is improved.

[0132] With reference to Figures 5-10 In some embodiments, the outer circumferential wall of the current collecting component 40 is provided with a positioning groove 411, the positioning groove 411 is annularly arranged around the current collecting component 40, and part of the sealing member 50 is accommodated in the positioning groove 411.

[0133] For example, the radial section of the sealing member 50 is circular, the outer circumferential wall of the current collecting component 40 is provided with the positioning groove 411, the positioning groove 411 is annularly arranged around the current collecting component 40, and the part of the sealing member 50 close to the current collecting component 40 in the radial direction of the through hole 32 is accommodated in the positioning groove 411.

[0134] For example, the radial section of the sealing member 50 is circular, the inner circumferential wall of the through hole 32 is provided with the fixing groove 33, the fixing groove 33 is annularly arranged around the current collecting component 40, the outer circumferential wall of the current collecting component 40 is provided with the positioning groove 411, the positioning groove 411 is annularly arranged around the current collecting component 40, the part of the sealing member 50 close to the wall of the through hole 32 in the radial direction is accommodated in the fixing groove 33, and the part of the sealing member 50 close to the current collecting component 40 in the radial direction of the through hole 32 is accommodated in the positioning groove 411.

[0135] When the heat exchange component 30 is slid along the current collecting component 40 and in the first direction, the sealing member 50 abuts against the outer circumferential wall of the current collecting component 40, the sealing member 50 is compressed and elastically deformed in the radial direction, when the heat exchange component 30 is slid in the first direction to the position of the positioning groove 411 on the current collecting component 40, the sealing member 50 expands under the action of its own elastic force and part of the sealing member 50 is accommodated in the positioning groove 411.

[0136] In the technical solution described above, by arranging the positioning groove 411 in the form of a ring around the current collecting component 40 and arranging part of the sealing member 50 in the positioning groove 411, the sealing member 50 can be fixedly connected with the current collecting component 40 in the circumferential direction, the contact area between the sealing member 50 and the current collecting component 40 is increased, the connection between the sealing member 50 and the current collecting component 40 is more reliable and stable, the risk of sealing failure caused by disconnection between the sealing member 50 and the current collecting component 40 is reduced, and the reliability of the battery device 100 as a whole is improved. In addition, the positioning groove 411 can play a positioning role on the sealing member 50, thereby playing a positioning role on the heat exchange component 30. During the assembly of the battery monomer assembly 10, the heat exchange component 30 is moved in the first direction, and when the sealing member 50 is arranged in the positioning groove 411, it indicates that the heat exchange component 30 is installed in place, thereby improving the assembly efficiency.

[0137] Reference Figure 5 In some embodiments, the peripheral wall of the current collecting component 40 is provided with a communication hole 43, the communication hole 43 communicates the current collecting channel 42 and the heat exchange flow channel, two sealing members 50 are arranged between each heat exchange end portion 31 and the current collecting component 40, and the two sealing members 50 are located on both sides of the communication hole 43 in the first direction.

[0138] In the technical solution described above, by arranging the peripheral wall of the current collecting component 40 with the communication hole 43 and arranging the communication hole 43 to communicate the current collecting channel 42 and the heat exchange flow channel, the heat exchange medium in the current collecting channel 42 can enter the heat exchange flow channel through the communication hole 43 to exchange heat with the battery monomer 61, and the heat exchange medium in the heat exchange flow channel after exchanging heat with the battery monomer 61 can also enter the current collecting channel 42 through the communication hole 43. Since the cooling medium is concentrated to flow between the current collecting channel 42 and the heat exchange flow channel through the communication hole 43, by arranging two sealing members 50 between each heat exchange end portion 31 and the current collecting component 40 and arranging the two sealing members 50 on both sides of the communication hole 43 in the first direction, the two sealing members 50 can sufficiently seal the part near the communication hole 43, both sides of the communication hole 43 in the first direction can be sealed by the sealing member 50, and the assembly of the current collecting component 40 and the heat exchange component 30 can be better sealed.

[0139] In some embodiments, the sealing member 50 is a polymer elastomer.

[0140] For example, the sealing member 50 can be a rubber member.

[0141] In the technical scheme, the sealing member 50 is made of polymer elastomer, so the sealing member 50 has good flexibility and elastic deformation capacity, the heat exchange component 30 can slide along the first direction relative to the current collecting component 40 more easily, the sliding resistance is reduced appropriately, and the assembly difficulty is reduced. In addition, the sealing member 50 can also seal the assembly between the current collecting component 40 and the heat exchange end 31.

[0142] With reference to Figure 5 In some embodiments, the heat exchange end 31 includes an end body 312 and a sealing flange 313, the sealing flange 313 is connected to at least one side of the end body 312 along the first direction, and a part of the through hole 32 is formed in the end body 312. The sealing flange 313 is arranged around the current collecting component 40 and surrounds another part of the through hole 32.

[0143] The sealing flange 313 is connected to at least one side of the end body 312 along the first direction, which means that the sealing flange 313 can be connected to one side of the end body 312 along the first direction, or the sealing flange 313 can be connected to both sides of the end body 312 along the first direction.

[0144] For example, the radial cross section of the through hole 32 is circular, and the sealing flange 313 is in the shape of a circular ring along the radial cross section of the through hole 32.

[0145] In the technical scheme, the heat exchange end 31 includes the sealing flange 313, the sealing flange 313 is connected to at least one side of the end body 312 along the first direction, and the sealing flange 313 surrounds another part of the through hole 32. The sealing flange 313 can increase the contact area between the heat exchange end 31 and the current collecting component 40, and can increase the sealing effect between the heat exchange end 31 and the current collecting component 40 more fully. In addition, the sealing flange 313 provides more installation space for the sealing member 50, so that the sealing member 50 can be connected to the heat exchange end 31 more easily.

[0146] With reference to Figure 5 In some embodiments, at least part of the sealing member 50 is located between the inner circumferential wall of the sealing flange 313 and the outer circumferential wall of the current collecting component 40.

[0147] The at least part of the sealing member 50 between the inner peripheral wall of the sealing flange 313 and the outer peripheral wall of the current collecting component 40 can mean that the sealing member 50 is entirely between the inner peripheral wall of the sealing flange 313 and the outer peripheral wall of the current collecting component 40, or that a part of the sealing member 50 in the first direction is between the inner peripheral wall of the sealing flange 313 and the outer peripheral wall of the current collecting component 40, and the other part is between the inner peripheral wall of the end body 312 and the outer peripheral wall of the current collecting component 40, or that a part of the sealing member 50 in the first direction is between the inner peripheral wall of the sealing flange 313 and the outer peripheral wall of the current collecting component 40, and the other part is at a position of the sealing flange 313 away from the end body 312 in the first direction.

[0148] When the heat exchange end 31 includes the heat exchange body and one sealing flange 313 located at one end of the heat exchange body in the first direction, one sealing member 50 can be arranged corresponding to each through hole 32, and the at least part of the sealing member 50 is between the inner peripheral wall of the sealing flange 313 and the outer peripheral wall of the current collecting component 40.

[0149] When the heat exchange end 31 includes the heat exchange body and two sealing flanges 313 located at both sides of the heat exchange body in the first direction, two sealing members 50 can be arranged corresponding to each through hole 32, the two sealing members 50 correspond to the two sealing flanges 313 one by one, and the at least part of the sealing member 50 is between the inner peripheral wall of the corresponding sealing flange 313 and the outer peripheral wall of the current collecting component 40.

[0150] In the above technical solution, by arranging the at least part of the sealing member 50 between the inner peripheral wall of the sealing flange 313 and the outer peripheral wall of the current collecting component 40, the sealing member 50 can better seal the assembly gap between the sealing flange 313 and the current collecting component 40; and by connecting the sealing member 50 and the sealing flange 313, the sealing flange 313 provides a larger installation space for the sealing member 50, so that the sealing member 50 is more easily connected with the heat exchange end 31, and the sealing member 50 is prevented from blocking the communication hole 43.

[0151] In some embodiments, a sealing glue is arranged between the inner peripheral wall of the sealing flange 313 and the outer peripheral wall of the current collecting component 40, and the sealing glue is arranged around the current collecting component 40 and located on the side of the sealing member 50 away from the end body 312.

[0152] For example, when the heat exchange end 31 includes the heat exchange body and one sealing flange 313 located at one end of the heat exchange body in the first direction, the sealing glue is arranged between the inner peripheral wall of the sealing flange 313 and the outer peripheral wall of the current collecting component 40, and the sealing glue is arranged around the current collecting component 40 and located on the side of the sealing member 50 away from the end body 312.

[0153] For example, when the heat exchange end portion 31 comprises a heat exchange body and two sealing flanges 313 located on both sides of the heat exchange body along the first direction, a sealing glue is arranged between the inner circumferential wall of the two sealing flanges 313 and the outer circumferential wall of the current collecting component 40, and the sealing glue is arranged around the current collecting component 40 and located on the side of the sealing member 50 away from the end body 312.

[0154] In the above technical solution, by arranging the sealing glue between the inner circumferential wall of the sealing flange 313 and the outer circumferential wall of the current collecting component 40, the assembly gap between the flexible connecting piece and the current collecting component 40 can be reduced or avoided, and the sealing performance between the sealing flange 313 and the current collecting component 40 is further improved. In addition, the connection between the sealing flange 313 and the current collecting component 40 can be more reliable.

[0155] In some embodiments, the outer circumferential wall of the sealing flange 313 is sleeved with a clamp or wrapped with a cable tie.

[0156] For example, the outer circumferential wall of the sealing flange 313 is sleeved with a clamp.

[0157] For another example, the outer circumferential wall of the sealing flange 313 is wrapped with a cable tie.

[0158] For another example, the outer circumferential wall of the sealing flange 313 is sleeved with a clamp and wrapped with a cable tie.

[0159] By sleeving the outer circumferential wall of the sealing flange 313 with a clamp or wrapping it with a cable tie, the connection between the sealing flange 313 and the current collecting component 40 can be more reliable, and the heat exchange component 30 can be further prevented from sliding along the first direction again after being installed in place, so that the heat exchange medium cannot flow between the heat exchange component 30 and the current collecting component 40 through the communication hole 43, and the overall reliability of the thermal management unit 20 is improved.

[0160] In some embodiments, the current collecting component 40 is an integrally formed piece.

[0161] For example, the current collecting component 40 can be a metal piece or a non-metal piece.

[0162] In the above technical solution, by making the current collecting component 40 an integrally formed piece, the step of connecting and installing multiple current collecting components 40 in the related art is not needed, the number of parts of the battery monomer assembly 10 as a whole is reduced, and the installation efficiency of the battery monomer assembly 10 is improved.

[0163] Reference Figure 5 In some embodiments, the cross section of the current collecting component 40 is a circular ring.

[0164] The cross section of the current collecting component 40 is perpendicular to the first direction.

[0165] In the technical solution, the cross section of the current collecting part 40 is circular, the cross section of the current collecting channel 42 is circular, the corners in the current collecting channel 42 are reduced, the flow resistance of the heat exchange medium in the current collecting channel 42 is reduced, the flow speed of the heat exchange medium is improved, and the heat exchange efficiency is improved.

[0166] With reference to Figures 1-5 In some embodiments, in the first direction, the flow area of the current collecting channel 42 is consistent.

[0167] For example, in the first direction, the axial cross section shape of the current collecting channel 42 is consistent.

[0168] In the technical solution, the flow area of the current collecting channel 42 in the first direction is consistent, the heat exchange medium in the current collecting channel 42 flows in the first direction, the resistance of the heat exchange medium in the current collecting channel 42 is reduced, the flow resistance of the heat exchange medium in the current collecting channel 42 is reduced, the flow speed of the heat exchange medium is improved, and the heat exchange efficiency is improved.

[0169] With reference to Figure 7 In some embodiments, the current collecting part 40 is two, the two current collecting parts 40 are arranged on the two sides of the battery monomer group 60 in the second direction, each heat exchange part 30 has a heat exchange end part 31 at the two ends in the second direction, the current collecting part 40 on the same side in the second direction is arranged in the through hole 32 of the corresponding heat exchange end part 31; wherein one of the current collecting parts 40 is provided with a current collecting inlet 44 and the other current collecting part 40 is provided with a current collecting outlet 45.

[0170] In this way, when the heat management unit 20 works, the heat exchange medium enters one of the current collecting parts 40 from the current collecting inlet 44, and then flows into the heat exchange flow channels of the plurality of heat exchange parts 30, flows through the plurality of heat exchange parts 30, and then flows into the other current collecting part 40 group, and then flows out from the current collecting outlet 45.

[0171] For example, the heat management unit 20 can further include a plugging cap 21, the plugging cap 21 is used to plug the current collecting inlet 44 or the current collecting outlet 45 of the current collecting part 40.

[0172] For example, each heat exchange part 30 has two heat exchange interfaces, one of which is a heat exchange inlet and the other is a heat exchange outlet, the heat exchange medium flows into the heat exchange flow channel from the heat exchange inlet and flows out from the heat exchange outlet. The heat exchange interface can be arranged at the heat exchange end part 31 of the heat exchange part 30, one of the two heat exchange end parts 31 of each heat exchange part 30 is provided with a heat exchange inlet and the other is provided with a heat exchange outlet. The heat exchange flow channel in the heat exchange part 30 communicates the heat exchange inlet and the heat exchange outlet, and the current collecting channel 42 in the current collecting part 40 can communicate with the heat exchange flow channel through the heat exchange interface.

[0173] For example, the flow collection channel 42 of the flow collection component 40 provided with the flow collection inlet 44 can be communicated with the heat exchange flow channel through the heat exchange inlet, and the flow collection channels 42 of two adjacent flow collection components 40 can be communicated through the heat exchange inlets on the heat exchange end 31. The flow collection channel 42 of the flow collection component 40 provided with the flow collection outlet 45 can be communicated with the heat exchange flow channel through the heat exchange outlet, and the flow collection channels 42 of two adjacent flow collection components 40 can be communicated through the heat exchange outlets on the heat exchange end 31.

[0174] In the above technical solution, the flow collection component 40 is provided as two groups of flow collection components 40, and the two groups of flow collection components 40 are respectively arranged on the two sides of the battery monomer group 60 along the second direction, so that the arrangement of the flow collection component 40 is facilitated, and the heat exchange medium can flow into one group of flow collection components 40 and flow into the heat exchange flow channels of the plurality of heat exchange components 30, and the heat exchange medium flowing through the plurality of heat exchange components 30 can flow into the other group of flow collection components 40 and flow out from the flow collection outlet 45, so that the flow channel arrangement in the heat management unit 20 is relatively simple.

[0175] In some embodiments, along the first direction, the side of the heat exchange component 30 facing the battery monomer group 60 is provided with a heat-conducting adhesive layer.

[0176] By providing the heat-conducting adhesive layer on the side of the heat exchange component 30 facing the battery monomer group 60, after the battery monomer group 60 is inserted into two adjacent heat exchange components 30, the heat exchange component 30 and the battery monomer group 60 can be slid and pressed along the first direction, so that the battery monomer group 60 and the adjacent heat exchange component 30 can be fixed as a whole by the heat-conducting adhesive layer.

[0177] In some embodiments, along the first direction, the side of the battery monomer group 60 facing the heat exchange component 30 is provided with a heat-conducting adhesive layer.

[0178] For example, along the first direction, the side of the heat exchange component 30 facing the battery monomer group 60 is provided with a heat-conducting adhesive layer, and the side of the battery monomer group 60 facing the heat exchange component 30 is provided with a heat-conducting adhesive layer.

[0179] By providing the heat-conducting adhesive layer on the side of the battery monomer group 60 facing the heat exchange component 30, after the battery monomer group 60 is inserted into two adjacent heat exchange components 30, the heat exchange component 30 and the battery monomer group 60 can be slid and pressed along the first direction, so that the battery monomer group 60 and the adjacent heat exchange component 30 can be fixed as a whole by the heat-conducting adhesive layer.

[0180] Reference Figure 1 and Figure 2In some embodiments, each battery cell group 60 includes a plurality of battery cells 61, and the plurality of battery cells 61 in each battery cell group 60 are connected as a whole.

[0181] For example, the plurality of battery cells 61 in each battery cell group 60 can be fixed as a whole by adhesive.

[0182] In the above technical solution, by connecting the plurality of battery cells 61 in each battery cell group 60 as a whole, when the battery cell group 60 is inserted between two adjacent heat exchange components 30, the battery cell group 60 can be connected as a whole first, so that the battery cell group 60 can be inserted as a whole between the two heat exchange components 30, making the operation of inserting the battery cell group 60 between the two adjacent heat exchange components 30 simpler and more convenient, and can also improve the assembly efficiency.

[0183] Referring to Figure 1 and Figure 2 In some embodiments, the plurality of battery cells 61 in each battery cell group 60 are arranged along the second direction.

[0184] In the above technical solution, by arranging the plurality of battery cells 61 in the battery cell group 60 along the second direction, each battery cell 61 in the battery cell group 60 can be in thermal conduction connection with the heat exchange components 30 on both sides, so that the thermal conduction area of each battery cell 61 with the heat exchange components 30 is larger, which can better improve the temperature regulation efficiency of the battery cell 61.

[0185] Referring to Figures 7-12 In a second aspect, the application provides an assembly method of a battery device 100, the battery device 100 being the battery device 100 according to the first aspect of the application, and the assembly method comprising: sequentially threading the current collecting component 40 along the first direction through the heat exchange end portions 31 of the plurality of heat exchange components 30, the plurality of heat exchange components 30 being sequentially the first to Nth heat exchange components 30 along the first direction, N≥2 and being an integer; sliding the first heat exchange component 30 along the first direction to the first preset position and fixing it at the first preset position; sliding the second heat exchange component 30 along the first direction relative to the current collecting component 40 to avoid the accommodation space 201 for accommodating the battery cell group 60; placing the first battery cell group 60 between the first heat exchange component 30 and the second heat exchange component 30, and connecting and fixing the first battery cell group 60 with the first heat exchange component 30; sliding the second heat exchange component 30 along the first direction to the second preset position and fixing it at the second preset position, and connecting and fixing the first battery cell group 60 with the second heat exchange component 30; The third heat exchange component 30 is slid along the first direction relative to the current collecting component 40 to avoid the accommodating space 201 for accommodating the battery monomer group 60; The second group of battery monomer groups 60 is placed between the second heat exchange component 30 and the third heat exchange component 30, and the second group of battery monomer groups 60 is fixedly connected with the second heat exchange component 30; The third heat exchange component 30 is slid along the first direction to the third preset position and fixed at the third preset position, and the second group of battery monomer groups 60 is fixedly connected with the third heat exchange component 30; In sequence, until the N-1th group of battery monomer groups 60 and the corresponding heat exchange components 30 are assembled, thereby assembling the battery monomer assembly 10; The battery monomer assembly 10 is assembled into the box body 11.

[0186] The above first preset position, second preset position and the like are positions at which the heat exchange flow channel of the heat exchange component 30 can be in communication with the current collecting flow channel of the current collecting component 40. For example, the preset position can be a position at which the communication hole 43 is formed on the current collecting component 40. The number of the preset positions is the same as the number of the heat exchange components 30 and each corresponds to one of the heat exchange components 30, 1≤M≤N and M is an integer.

[0187] For example, the sealing member 50 is fixed on the inner circumferential wall of the through hole 32 of the heat exchange component 30, and the outer circumferential wall of the current collecting component 40 is provided with the positioning groove 411, when the heat exchange component 30 is slid along the current collecting component 40 and along the first direction to the corresponding preset position, part of the sealing member 50 on the heat exchange end 31 is clamped into the positioning groove 411 of the current collecting component 40. It should be noted that during the process of sliding the heat exchange component 30 along the current collecting component 40 and along the first direction, if the sealing member 50 on the heat exchange component 30 is clamped into the positioning groove 411 of the current collecting component 40, if it is desired to continue to slide the heat exchange component 30 along the first direction, the heat exchange component 30 can be pushed along the first direction to make the sealing member 50 on the heat exchange component 30 disengage from the positioning groove 411 on the current collecting component 40 to continue to slide.

[0188] For example, referring to Figures 8-10The inner circumferential wall of the penetrating hole 32 is fixed with a sealing member 50, and the inner circumferential wall of the penetrating hole 32 is provided with a fixing groove 33, and part of the sealing member 50 is accommodated in the fixing groove 33; the outer circumferential wall of the current collecting component 40 is provided with a plurality of positioning groove groups 41, the plurality of positioning groove groups 41 are arranged in the first direction, the number of the positioning groove groups 41 is the same as and corresponds to the number of the heat exchange components 30, and each positioning groove group 41 includes two positioning grooves 411 arranged in the first direction. When part of the sealing member 50 corresponding to the first heat exchange component 30 is clamped into the corresponding positioning groove group 41, the first heat exchange component 30 moves to the first preset position. When part of the sealing member 50 corresponding to the second heat exchange component 30 is clamped into the corresponding positioning groove group 41, the second heat exchange component 30 moves to the second preset position.

[0189] For example, referring to Figures 7-9 After the first heat exchange component 30 is slid along the first direction to the first preset position and is fixed at the first preset position, the second heat exchange component 30 is slid along the first direction relative to the current collecting component 40, so that the distance between the first heat exchange component 30 and the second heat exchange component 30 is greater than the thickness t of the battery monomer group 60 in the first direction, and there is a gap between the battery monomer group 60 and the second heat exchange component 30. Therefore, when the battery monomer group 60 is inserted between the adjacent two heat exchange components 30, the battery monomer group 60 is prevented from contacting the heat exchange component 30, thereby improving the insertion efficiency.

[0190] For example, referring to Figure 10 After the second heat exchange component 30 is slid along the first direction to the second preset position and is fixed at the second preset position, the second heat exchange component 30 presses and fixes the battery monomer group 60 between the first heat exchange component 30 and the second heat exchange component 30. Then, the third heat exchange component 30 is slid along the first direction relative to the current collecting component 40, so that the distance between the second heat exchange component 30 and the third heat exchange component 30 is greater than the thickness t of the battery monomer group 60 in the first direction, and there is a gap between the battery monomer group 60 and the third heat exchange component 30. Therefore, when the battery monomer group 60 is inserted between the adjacent two heat exchange components 30, the battery monomer group 60 is prevented from contacting the heat exchange component 30, thereby improving the insertion efficiency.

[0191] For example, the second heat exchange component 30 can be slid to the second preset position and fixed at the second preset position by using a pressing tool or manually pushing. Since the second heat exchange component 30 is subjected to the pressure in the first direction, the heat-conducting adhesive layer on the battery monomer 61 and / or the heat-conducting adhesive layer on the first heat exchange component 30 adhere and fix the battery monomer group 60 and the first heat exchange component 30 into an integral whole.

[0192] For example, referring toFigure 12 The housing 11 includes a first housing 11 and a second housing 101. The first housing 11 covers the upper side of the second housing 101. When the battery cell assembly 10 is assembled into the housing 11, the battery cell assembly 10 is hoisted into the second housing 101. After the installation is completed, the first housing 11 is placed on top of the second housing 101.

[0193] In the above technical solution, when assembling the battery device 100, the current collector 40 can be passed through the through holes 32 of multiple heat exchange components 30 in sequence. During the assembly process, by sliding the heat exchange components 30 along the current collector 40 and in the first direction, the distance between two adjacent heat exchange components 30 can be adjusted, which facilitates the insertion of the battery cell assembly 60 into the receiving space 201 between two adjacent heat exchange components 30. It also facilitates pressing and connecting the heat exchange components 30 and the battery cell assembly 60 in the second direction. The heat exchange components 30 are assembled by sliding along the current collector 40. Compared with the method of assembling multiple heat exchange components 30 with multiple current collectors separately in the related technology, this method eliminates the process of assembling multiple heat exchange components 30 with multiple current collectors separately in the related technology, and also reduces the number of parts, mainly the number of current collectors 40. This assembly process is simple and convenient, which can improve the assembly efficiency of the battery cell assembly 10. The assembled battery cell assembly 10 can be put into the box as a whole, thereby improving the assembly efficiency of the battery device 100 and shortening the assembly time.

[0194] Reference Figure 13 Thirdly, this application provides an electrical device 1000, including a battery device 100 according to an embodiment of the second aspect of this application.

[0195] The electrical device 1000 can be a vehicle, and the battery device 100 can be installed at the bottom of the vehicle body 200.

[0196] In the above technical solution, the electrical device 1000 is equipped with the battery device 100, which has high temperature regulation efficiency and high assembly efficiency.

[0197] The following reference Figures 1-12 A battery device 100 according to some specific embodiments of the present invention is described.

[0198] Reference Figures 1-12In this embodiment, the battery device 100 comprises a box body 11 and a battery cell assembly 10 arranged in the box body 11 and comprising a thermal management unit 20 and at least one battery cell group 60, each battery cell group 60 comprising at least one battery cell 61, the thermal management unit 20 comprising a current collecting component 40 and a plurality of heat exchange components 30 arranged in a first direction, each adjacent two heat exchange components 30 being provided with a battery cell group 60, the battery cell group 60 being in thermal conductive connection with the heat exchange component 30, the current collecting component 40 being located on at least one side of the battery cell group 60 in a second direction, the second direction intersecting the first direction.

[0199] The end of the heat exchange component 30 in the second direction is a heat exchange end 31, the heat exchange end 31 is provided with a through hole 32, the through hole 32 penetrates the heat exchange end 31 in the first direction, the current collecting component 40 is arranged in the through hole 32, the heat exchange component 30 has a heat exchange flow channel for the flow of heat exchange medium, and the current collecting component 40 has a current collecting channel 42 for the flow of heat exchange medium, the heat exchange flow channel and the current collecting channel 42 are in communication.

[0200] The inner circumferential wall of the through hole 32 and the outer circumferential wall of the current collecting component 40 are provided with a sealing element 50, the sealing element 50 is annularly arranged around the current collecting component 40, the radial section of the sealing element 50 is circular, the radial section of the sealing element 50 is perpendicular to the axial direction of the sealing element 50, and the sealing element 50 is a polymer elastomer. The sealing element 50 is fixedly attached to the heat exchange end 31 and abuts against the outer circumferential wall of the current collecting component 40. The inner circumferential wall of the through hole 32 is provided with a fixing groove 33, the fixing groove 33 is annularly arranged around the current collecting component 40, the outer circumferential wall of the current collecting component 40 is provided with a positioning groove 411, the positioning groove 411 is annularly arranged around the current collecting component 40, part of the sealing element 50 is arranged in the fixing groove 33, and another part of the sealing element 50 is arranged in the positioning groove 411.

[0201] The circumferential wall of the current collecting component 40 is provided with a communication hole 43, the communication hole 43 communicates the current collecting channel 42 and the heat exchange flow channel, and each heat exchange end 31 and the current collecting component 40 are provided with two sealing elements 50, the two sealing elements 50 are located on both sides of the communication hole 43 in the first direction. The heat exchange end 31 comprises an end body 312 and a sealing flange 313 connected on both sides of the end body 312 in the first direction, part of the through hole 32 is formed in the end body 312, and the sealing flange 313 is arranged around the current collecting component 40 and surrounds another part of the through hole 32. The sealing element 50 is located between the inner circumferential wall of the sealing flange 313 and the outer circumferential wall of the current collecting component 40. The inner circumferential wall of the sealing flange 313 and the outer circumferential wall of the current collecting component 40 are provided with a sealing glue, the sealing glue is arranged around the current collecting component 40 and is located on the side of the sealing element 50 away from the end body 312.

[0202] The current collecting member 40 is an integral piece, and the cross section of the current collecting member 40 is a circular ring. In the first direction, the flow area of the current collecting channel 42 is consistent.

[0203] The current collecting member 40 is two, and the two current collecting members 40 are arranged on both sides of the battery monomer group 60 along the second direction. Each heat exchange member 30 has a heat exchange end 31 at both ends along the second direction, and the current collecting member 40 on the same side along the second direction is arranged in the through hole 32 of the corresponding heat exchange end 31. Among them, one of the current collecting members 40 is provided with a current collecting inlet 44, and the other current collecting member 40 is provided with a current collecting outlet 45.

[0204] In the first direction, the side of the heat exchange member 30 facing the battery monomer group 60 is provided with a heat-conducting adhesive layer, and the side of the battery monomer group 60 facing the heat exchange member 30 is provided with a heat-conducting adhesive layer.

[0205] Each battery monomer group 60 includes a plurality of battery monomers 61, and the plurality of battery monomers 61 in each battery monomer group 60 are connected as a whole. The plurality of battery monomers 61 in each battery monomer group 60 are arranged along the second direction.

[0206] In the description of the present specification, the description of the terms "one embodiment", "some embodiments", "exemplary embodiment", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the exemplary description of the above terms does not necessarily mean the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0207] Although the embodiments of the present application have been shown and described, those skilled in the art can understand that various changes, modifications, replacements and variations can be made to the embodiments without departing from the principles and purposes of the present application, and the scope of the present application is defined by the claims and their equivalents.

Claims

1. A battery device, characterized by, The battery cell assembly comprises at least one battery cell group, and the heat management unit comprises a current collecting component and a plurality of heat exchange components, the plurality of heat exchange components are arranged in a first direction, and the battery cell group is arranged between each adjacent two heat exchange components and is in thermal connection with the heat exchange components, and the current collecting component is located on at least one side of the battery cell group in a second direction intersecting with the first direction. The heat exchange component is provided with a through hole penetrating the heat exchange end portion along the first direction, the current collecting component is arranged in the through hole, the heat exchange component is provided with a heat exchange flow channel for the flow of a heat exchange medium, the current collecting component is provided with a current collecting channel for the flow of the heat exchange medium, the heat exchange flow channel and the current collecting channel are in communication, an inner circumferential wall of the through hole and an outer circumferential wall of the current collecting component are provided with a sealing element, and the inner circumferential wall of the through hole and / or the outer circumferential wall of the current collecting component is provided with a positioning groove.

2. The battery device of claim 1, wherein The sealing element is fixed to the heat exchange end portion and abuts against the outer circumferential wall of the current collecting component.

3. The battery device of claim 2, wherein, The sealing element is adhesively fixed to the heat exchange end portion.

4. The battery device of claim 1, wherein The sealing element is annular and surrounds the current collecting component.

5. The battery device of claim 4, wherein, The radial cross section of the sealing element is circular, and the radial cross section of the sealing element is perpendicular to the axial direction of the sealing element.

6. The battery device of claim 4, wherein The inner circumferential wall of the through hole is provided with a fixing groove, the fixing groove is annular and surrounds the current collecting component, and part of the sealing element is arranged in the fixing groove. The outer circumferential wall of the current collecting component is provided with a positioning groove, the positioning groove is annular and surrounds the current collecting component, and part of the sealing element is arranged in the positioning groove.

7. The battery device of claim 4, wherein The outer circumferential wall of the current collecting component is provided with a communication hole, the communication hole communicates the current collecting channel and the heat exchange flow channel, and two sealing elements are arranged between each heat exchange end portion and the current collecting component and are located on both sides of the communication hole in the first direction.

8. The battery device of claim 1, wherein, The sealing element is a polymer elastomer.

9. The battery device of claim 1, wherein, The heat exchange end portion comprises an end portion body and a sealing flange, the sealing flange is connected to at least one side of the end portion body in the first direction, part of the through hole is formed in the end portion body, the sealing flange surrounds the current collecting component and surrounds another part of the through hole.

10. The battery device of claim 9, wherein, At least part of the sealing element is located between the inner circumferential wall of the sealing flange and the outer circumferential wall of the current collecting component.

11. The battery device of claim 9, wherein, Sealing glue is arranged between the inner circumferential wall of the sealing flange and the outer circumferential wall of the current collecting component, surrounds the current collecting component, and is located on the side of the sealing element away from the end portion body.

12. The battery device of claim 9, wherein, The outer circumferential wall of the sealing flange is sleeved with a clamp or surrounded with a strap.

13. The battery device of any one of claims 1-12, wherein, The current collecting component is an integral component, and / or the cross section of the current collecting component is annular.

14. The battery device of any one of claims 1-12, wherein, In the first direction, the flow area of the current collecting channel is consistent.

15. The battery device of any one of claims 1-12, wherein, The current collecting components are two, the two current collecting components are arranged on both sides of the battery monomer groups along the second direction, each of the heat exchange components has the heat exchange end portion at both ends along the second direction, and the current collecting components on the same side in the second direction are arranged through the through holes of the corresponding heat exchange end portions; Among them, one of the current collecting components is provided with a current collecting inlet, and the other current collecting component is provided with a current collecting outlet.

16. The battery device of any one of claims 1-12, wherein, In the first direction, the side of the heat exchange component facing the battery monomer group is provided with a heat-conducting adhesive layer; and / or, in the first direction, the side of the battery monomer group facing the heat exchange component is provided with a heat-conducting adhesive layer.

17. The battery device of any one of claims 1-12, wherein, Each of the battery monomer groups includes a plurality of battery monomers, and the plurality of battery monomers in each of the battery monomer groups are connected as a whole and / or arranged along the second direction.

18. A method of assembling a battery device, characterized by The battery device is the battery device according to any one of claims 1-17, and the assembly method comprises: The current collecting components are arranged through the heat exchange end portions of the plurality of heat exchange components along the first direction in sequence, the plurality of heat exchange components are sequentially the first to Nth heat exchange components along the first direction, N≥2 and is an integer; The first heat exchange component is slid along the first direction to a first preset position and fixed at the first preset position; The second heat exchange component is slid along the first direction relative to the current collecting component to avoid the accommodation space for accommodating the battery monomer groups; The first group of battery monomer groups is placed between the first heat exchange component and the second heat exchange component, and the first group of battery monomer groups is connected and fixed with the first heat exchange component; The second heat exchange component is slid along the first direction to a second preset position and fixed at the second preset position, and the first group of battery monomer groups is connected and fixed with the second heat exchange component; The third heat exchange component is slid along the first direction relative to the current collecting component to avoid the accommodation space for accommodating the battery monomer groups; The second group of battery monomer groups is placed between the second heat exchange component and the third heat exchange component, and the second group of battery monomer groups is connected and fixed with the second heat exchange component; The third heat exchange component is slid along the first direction to a third preset position and fixed at the third preset position, and the second group of battery monomer groups is connected and fixed with the third heat exchange component; In sequence, until the N-1th group of battery monomer groups and the corresponding heat exchange components are assembled, thereby assembling the battery monomer assembly; The battery monomer assembly is assembled into the box.

19. An electrical device, comprising: The battery device comprises the battery device according to any one of claims 1-17.

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