Battery cell assembly, battery and electric vehicle

Abstract

The utility model discloses a battery cell subassembly, battery and electromobile, the battery cell subassembly includes shell and a plurality of battery cells, shell includes bottom plate, two first side plate and two second side plate, the two first side plate is connected to the opposite two sides of bottom plate along the first direction, and the two second side plate is connected to the opposite two sides of bottom plate along the second direction. The two second side plates are arranged on the two opposite sides of the bottom plate in the second direction respectively, at least one second side plate is detachable, the first direction is perpendicular to the second direction, and the battery cells are contained in the shell and arranged in the first direction. According to the battery cell assembly, the battery and the electric vehicle, when the faulted battery cell needs to be disassembled, the operation is convenient, time and labor are saved, and parts such as the wiring terminal and the wiring harness are not easy to damage.

Description

TECHNICAL FIELD

[0001] The utility model relates to battery technology field especially relates to a battery cell subassembly, battery and electric motor car. BACKGROUND

[0002] Part of the battery cell subassembly includes the casing and the multiple battery cells that are arranged side by side in the casing, in addition, the top end of the casing is also provided with other components, for example, the protective plate and the wiring terminal etc. In the prior art, when part of the battery cells appear failure, the protective plate and the wiring terminal of the top end of the casing need to be removed, then all the battery cells are taken out integrally, so that the battery cell appearing failure can be removed, the operation is troublesome, time-consuming and laborious, and during the dismounting process, the wiring terminal and the wire harness and other components are easily damaged. SUMMARY

[0003] The utility model aims at at least one of the technical problems existing in the prior art. To this end, the utility model provides a battery cell subassembly, when the battery cell appearing failure needs to be removed, the operation is not only convenient, time-saving and labor-saving, but also the wiring terminal and the wire harness and other components are not easily damaged.

[0004] The utility model further provides a battery with the battery cell subassembly.

[0005] The utility model further provides an electric motor car with the battery.

[0006] According to the battery cell subassembly of the first aspect embodiment of the utility model, including casing and multiple battery cells, the casing includes bottom plate, two first side plates and two second side plates, two first side plates are connected to the opposite sides of the bottom plate along the first direction, two second side plates are arranged on the opposite sides of the bottom plate along the second direction respectively, and at least one second side plate is detachable, wherein the first direction is perpendicular to the second direction, and multiple battery cells are contained in the casing and arranged along the first direction.

[0007] According to the battery cell subassembly of the utility model embodiment, at least has the following beneficial effects:

[0008] In the utility model, when the battery cell appears failure, the second side plate that can be detached is removed, and one side or both sides of the casing along the second direction can be open to expose the battery cell, then the battery cell appearing failure is taken out from the opening, after the maintenance is completed, the battery cell that is repaired is inserted into the casing from the opening, without removing the protective plate and the wiring terminal and other components of the top end of the casing, the operation is more convenient, more time-saving and labor-saving, and during the dismounting process, the wiring terminal and the wire harness and other components are not touched, so that the wiring terminal and the wire harness and other components are not easily damaged, and the practicability is better.

[0009] According to some embodiments of the present application, the two sides of the second side plate are respectively folded to form a folded edge, the folded edge is attached to the outer surface of the adjacent first side plate, and the first side plate is connected by a first fastener; and / or, the bottom end of the second side plate is connected to the bottom plate by a second fastener.

[0010] According to some embodiments of the present application, two adjacent battery cells are provided with a tab assembly, the tab assembly comprises two first tabs, two first tabs are respectively connected to two adjacent battery cells, the battery cell assembly further comprises a plurality of clamping assemblies, the clamping assembly comprises two clamping pieces, two clamping pieces are respectively attached to one side of two first tabs of the tab assembly, and two clamping pieces are respectively attached to one side of two first tabs of the tab assembly.

[0011] According to some embodiments of the present application, two first tabs of the tab assembly are bent to form a bending part in the direction away from the battery cell, two bending parts are attached and clamped between two clamping pieces, and the bending part is provided with a connecting hole for the third fastener.

[0012] According to some embodiments of the present application, the battery cell assembly further comprises an insulating top plate and a protective plate, the insulating top plate is arranged at the top end of the shell, the top surface of the insulating top plate is provided with a plurality of accommodating grooves, the bottom end of the accommodating groove is provided with an opening, the tab assembly is arranged in the opening, the clamping assembly is located in the accommodating groove, the protective plate covers the insulating top plate, and the protective plate is provided with a plurality of wiring holes.

[0013] According to some embodiments of the present application, the outermost two battery cells are provided with second tabs, the protective plate is provided with a notch corresponding to the second tab, the second tab is exposed, and the second tab is connected with a wiring terminal.

[0014] According to some embodiments of the present application, the battery cell assembly further comprises two insulating partitions, two insulating partitions are respectively arranged on one side away from two second tabs.

[0015] According to some embodiments of the present application, the battery cell assembly further comprises an insulation box, the insulation box is sleeved outside the shell, the insulation box comprises an insulation bottom wall, four insulation side walls and a plurality of adhesive strips, four insulation side walls are respectively reversibly connected to four sides of the insulation bottom wall, the adhesive strip is arranged in one of two adjacent insulation side walls and is separably attached to the other one, so as to realize the connection of two adjacent insulation side walls.

[0016] The battery according to the second aspect of the utility model, including battery box and the battery core subassembly that above-mentioned first aspect embodiment is described, the battery core subassembly is located in the battery box.

[0017] The battery according to the utility model embodiment has at least the following beneficial effects:

[0018] The battery adopts the battery core subassembly of the first aspect of the utility model, when the battery core needing to be disassembled, not only convenient operation, save time and effort, but also not easy to damage the wiring terminal and wire harness and other components.

[0019] The electric vehicle according to the third aspect of the utility model includes the battery of the second aspect of the utility model.

[0020] The electric vehicle according to the utility model embodiment has at least the following beneficial effects:

[0021] The electric vehicle adopts the battery of the second aspect of the utility model, and the battery adopts the battery core subassembly of the first aspect of the utility model, when the battery core needing to be disassembled, not only convenient operation, save time and effort, but also not easy to damage the wiring terminal and wire harness and other components.

[0022] Additional aspects and advantages of the utility model will be partially given in the following description, and some advantages will become apparent from the following description or be understood by the practice of the utility model. BRIEF DESCRIPTION OF DRAWINGS

[0023] The utility model will be further described below in connection with the drawings and examples, wherein:

[0024] Figure 1 It is the structural schematic diagram of the battery of the utility model embodiment;

[0025] Figure 2 It is Figure 1 It is the structural schematic diagram after the battery box is disassembled;

[0026] Figure 3 It is Figure 2 It is the structural schematic diagram after the heat preservation box is disassembled;

[0027] Figure 4 It is the installation schematic diagram of the protective plate;

[0028] Figure 5 It is Figure 4 It is the explosion drawing;

[0029] Figure 6 It is Figure 5 It is the enlarged view of A in the figure;

[0030] REFERENCE NUMERALS:

[0031] Housing 100; bottom plate 101; first side plate 102; second side plate 103; folded edge 104; first fastener 105; second fastener 106;

[0032] Battery cell 200; first tab 201; bent portion 202; second tab 203; terminal 204;

[0033] Clamping assembly 300; clamping piece 301; third fastener 302;

[0034] Insulating top plate 400; accommodating groove 401; opening 402;

[0035] Protective plate 500; wiring hole 501; notch 502;

[0036] Insulating partition plate 600;

[0037] Thermal insulation box 700; thermal insulation bottom wall 701; thermal insulation side wall 702; adhesive tape 703;

[0038] Battery box 800;

[0039] Cover 900. DETAILED DESCRIPTION

[0040] The embodiments of the present application are described in detail below, examples of which are shown in the drawings, wherein the same or similar notations represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by reference to the drawings are exemplary only, and are used only to explain the present application, and cannot be understood as a limitation of the present application.

[0041] In the description of the present application, it should be understood that the orientation description, such as the orientation or position relationship indicated by up, down, etc. is based on the orientation or position relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application.

[0042] In the description of the present application, the plural refers to two or more. If there is a description of first, second, it is only for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implying indicating the number of indicated technical features or implying indicating the sequence of indicated technical features.

[0043] In the description of the present application, unless otherwise explicitly limited, the words such as setting, installing, connecting, etc. should be broadly understood, and the person skilled in the art can reasonably determine the specific meaning of the above words in the present application in combination with the specific content of the technical solution.

[0044] The following description will be made with reference toFigures 1 to 6 The utility model discloses an electric core assembly, a battery and an electric vehicle.

[0045] According to the electric core assembly of the utility model first aspect embodiment, as Figures 3 to 5 Shown, including shell 100 and a plurality of electric core 200, shell 100 includes bottom plate 101, two first side plate 102 and two second side plate 103.Two first side plate 102 connects on the opposite side of bottom plate 101 along the first direction, two second side plate 103 respectively sets up on the opposite side of bottom plate 101 along the second direction, and at least one second side plate 103 is detachable, for example, can be two second side plate 103 all detachable, also can be only one second side plate 103 detachable, another fixed connection.Wherein, the first direction is perpendicular to the second direction, and the first direction and the second direction can be the extension direction of the two adjacent side edges of bottom plate 101 respectively, for example, one of the first direction and the second direction can be the length direction of bottom plate 101, and the other can be the width direction of bottom plate 101.

[0046] A plurality of electric core 200 is contained in shell 100, and is arranged along the first direction, when the detachable second side plate 103 is detached, shell 100 can be open on one side or both sides along the second direction and expose electric core 200.

[0047] In the utility model, when there is a fault in electric core 200, detach the detachable second side plate 103, and shell 100 can be open on one side or both sides along the second direction and expose electric core 200, then the electric core 200 with fault is extracted from the opening, and after maintenance, the repaired electric core 200 is inserted into shell 100 from the opening, without detaching the protective plate 500 at the top of shell 100 and the wiring terminal 204 and other components, the operation is more convenient, more time-saving and labor-saving, and the wiring terminal 204 and the wiring harness and other components are not touched during the dismounting process, so that the wiring terminal 204 and the wiring harness and other components are not easily damaged, and the utility is better.

[0048] Reference Figures 3 to 5 Shown, in some embodiments of the utility model, the two sides of second side plate 103 are respectively folded and formed with folding edge 104, folding edge 104 is attached to the outer surface of adjacent first side plate 102, and is connected with first side plate 102 by first fastener 105.Second side plate 103 is connected with first side plate 102 by folding edge 104, and the connection is more convenient and stable, and second side plate 103 can be detached after the first fastener 105 is detached, which is simple and convenient to operate.

[0049] It should be noted that the bottom end of the second side plate 103 and the bottom plate 101 can also be connected by the second fastener 106, so that the connection of the second side plate 103 is more stable. In addition, the second side plate 103 can also be connected in other ways, for example, it can also be clamped on the first side plate 102 and / or the bottom plate 101.

[0050] The tab of the two adjacent battery cells 200 of the existing battery cell assembly is connected in series between the battery cells 200 by welding, so not only is the operation troublesome, time-consuming and laborious, but also welding is not firm or melting through, etc. In addition, the welding slag produced is easy to pierce the outer aluminum plastic film, resulting in poor battery quality, and finally it is difficult to separate the two adjacent battery cells 200, and further difficult to disassemble the faulty battery cell 200. Referring to Figure 5 and Figure 6 As shown in the drawings, in some embodiments of the utility model, the two adjacent battery cells 200 are provided with a tab assembly, the tab assembly includes two first tabs 201 that are attached to each other, the two first tabs 201 are respectively connected to the two adjacent battery cells 200, and the battery cell assembly further includes a plurality of clamping assemblies 300, the clamping assembly 300 includes two clamping pieces 301, the two clamping pieces 301 are respectively attached to the side of the two first tabs 201 of the tab assembly that are away from each other, and a third fastener 302 is installed between the two clamping pieces 301.

[0051] For example, the battery cell 200 in the middle can be provided with two first tabs 201, and the two battery cells 200 on the outermost side can be provided with one first tab 201, the battery cell 200 in the middle is attached to the corresponding first tab 201 on the two adjacent battery cells 200 on both sides through the two first tabs 201 thereon, and the battery cell 200 on the outermost side is attached to the corresponding first tab 201 on the adjacent battery cell 200 through the one first tab 201 thereon. The third fastener 302 is installed between the two clamping pieces 301, the third fastener 302 can be a core-pulling rivet, the core-pulling rivet is stable in connection and easy to install, of course, the third fastener 302 can also be other structures, for example, a bolt, which will not be described here.

[0052] In the embodiment, when the two adjacent battery cells 200 of the battery cell assembly need to be connected in series, the two first tabs 201 of the tab assembly are attached to each other, then the two clamping pieces 301 of the clamping assembly 300 are attached to the sides of the two first tabs 201 of the tab assembly away from each other, and the two clamping pieces 301 are connected by the third fastener 302. The two clamping pieces 301 can clamp the two first tabs 201 of the tab assembly, so that the two first tabs 201 of the tab assembly are kept in the conductive state of attaching to each other. In this way, the connection of the first tabs 201 is more convenient, time-saving and labor-saving, and more firm, and the situation that the welding slag pierces the aluminum plastic film does not occur, and the quality of the battery is better. In addition, since the two first tabs 201 are clamped by the clamping assembly 300, they can be quickly disassembled, and when the battery cell 200 that needs to be disassembled fails, the operation is more convenient and time-saving and labor-saving.

[0053] Referring to Figure 6 As shown in the utility model, in some embodiments of the utility model, the two first tabs 201 of the tab assembly are bent in the opposite direction to form a bending part 202 away from the battery cell 200, the two bending parts 202 are attached to each other and clamped between the two clamping pieces 301, and the bending part 202 is provided with a connecting hole for the third fastener 302. In the embodiment, the first tab 201 is bent to form a bending part 202, and the clamping piece 301 clamps the bending part 202 of the two first tabs 201 of the tab assembly. In this way, the clamping of the clamping piece 301 is more convenient and stable. In addition, the bending part 202 is provided with a connecting hole for the third fastener 302, so that the connection between the two first tabs 201 is more stable.

[0054] Referring to Figures 2 to 5 As shown in the utility model, in some embodiments of the utility model, the battery cell assembly further comprises an insulating top plate 400 and a protective plate 500. The insulating top plate 400 is arranged at the top end of the shell 100, the top surface of the insulating top plate 400 is provided with a plurality of accommodating grooves 401, the bottom end of the accommodating groove 401 is provided with an opening 402, the tab assembly is arranged in the opening 402, the clamping assembly 300 is arranged in the accommodating groove 401, the protective plate 500 covers the insulating top plate 400, and the protective plate 500 is provided with a plurality of wiring holes 501. The insulating top plate 400 is arranged, the insulating top plate 400 is provided with the accommodating groove 401 for accommodating the clamping assembly 300, so that all the clamping assemblies 300 and the tab assembly can be conveniently limited, and the insulating top plate 400 is made of an electrically insulating material, so that the risk of short circuit and electric leakage can be reduced. The protective plate 500 is arranged, so that the clamping assembly 300 and the tab assembly can be further protected, and the protective plate 500 can also be made of an electrically insulating material, so that the risk of short circuit and electric leakage can be further reduced. The protective plate 500 is provided with a plurality of wiring holes 501, so that the wiring of the wire harness is facilitated.

[0055] Referring to Figure 4 andFigure 5 As shown in some embodiments of the utility model, the two outermost battery cells 200 are each provided with a second tab 203, the protective plate 500 is formed with a notch 502 corresponding to the second tab 203 to expose the second tab 203, and the second tab 203 is connected with a terminal 204. The two second tabs 203 can be respectively connected with a total positive bus bar and a total negative bus bar, the total positive bus bar and the total negative bus bar are each provided with a plurality of terminals 204, and the terminals 204 are used to connect with external wires. The protective plate 500 is provided with the notch 502 for exposing the second tab 203, thereby not only facilitating the connection of the terminal 204 with the second tab 203, but also facilitating wiring.

[0056] Reference Figures 2 to 5 As shown in some embodiments of the utility model, the battery cell assembly further comprises two insulating partitions 600, and the two insulating partitions 600 are respectively arranged on the side away from the two second tabs 203. The insulating partition 600 is made of an electrically insulating material, and the two insulating partitions 600 are respectively arranged on the side away from the two second tabs 203, that is, on the outside of the second tab 203, so as to further reduce the risk of short circuit and electric leakage.

[0057] Reference Figure 2 As shown in some embodiments of the utility model, the battery cell assembly further comprises a heat preservation box 700, the heat preservation box 700 is sleeved outside the shell 100, the heat preservation box 700 comprises a heat preservation bottom wall 701, four heat preservation side walls 702, and a plurality of adhesive strips 703, the four heat preservation side walls 702 are respectively reversibly connected to the four sides of the heat preservation bottom wall 701, the adhesive strip 703 is arranged on one of the two adjacent heat preservation side walls 702 and is detachably attached to the other one, so as to realize the connection of the two adjacent heat preservation side walls 702.

[0058] For example, the heat preservation bottom wall 701 can be square-shaped with four sides, and the heat preservation bottom wall 701 can be partially or entirely made of heat preservation material. The heat preservation side wall 702 can be square-shaped, and the heat preservation side wall 702 can be partially or entirely made of heat preservation material. The heat preservation side wall 702 is flexible at the connection with the heat preservation bottom wall 701, and the heat preservation side wall 702 can be flipped around the connection position between the heat preservation side wall 702 and the heat preservation bottom wall 701. When flipped to be substantially perpendicular to the heat preservation bottom wall 701, that is, the end surface of the heat preservation side wall 702 in the thickness direction is substantially a vertical surface, the two adjacent heat preservation side walls 702 can be in contact at the side close to each other. One of the two sides of the adjacent heat preservation side walls 702 close to each other is provided with an adhesive tape 703, and the adhesive tape 703 can extend to the top end and the bottom end of the heat preservation side wall 702 along the length direction of the side. The adhesive tape 703 is detachably attached to the other heat preservation side wall 702. Of course, the two sides of the adjacent heat preservation side walls 702 close to each other can be both provided with the adhesive tape 703, and the adhesive tapes 703 only need to be arranged in up and down directions.

[0059] In the embodiment, the heat preservation box 700 is provided. When the cold weather occurs, the shell 100 with the battery cell 200 can be placed in the heat preservation box 700. The heat preservation box 700 can preserve the battery cell 200, and the poor charge and discharge performance of the battery at low temperature can be avoided, so that the electric vehicle can have sufficient endurance in the cold weather. When the shell 100 with the battery cell 200 needs to be placed in the heat preservation box 700, the shell 100 with the battery cell 200 is placed on the heat preservation bottom wall 701, and then the four heat preservation side walls 702 are flipped upwards so that the four heat preservation side walls 702 are substantially perpendicular to the heat preservation bottom wall 701. In this case, the four heat preservation side walls 702 are attached to the four sides of the shell 100, and then the adhesive tape 703 is attached to the adjacent heat preservation side wall 702. When the shell 100 with the battery cell 200 needs to be taken out of the heat preservation box 700, the adhesive tape 703 is separated from the adjacent heat preservation side wall 702, and then the four heat preservation side walls 702 are flipped downwards so that the four heat preservation side walls 702 are separated from the four sides of the shell 100. The shell 100 with the battery cell 200 can be taken out, and the operation is more convenient and saves time and effort. In addition, when the heat preservation box 700 is transported and stored, the heat preservation side wall 702 can be flipped to an unfolded state or a stacked state with the heat preservation bottom wall 701, so that the volume of the heat preservation box 700 is greatly reduced, and the transportation and storage are more convenient.

[0060] According to the second aspect of the battery of the utility model, the battery comprises a battery box 800 and the battery cell assembly of the first aspect of the utility model. The battery cell assembly is installed in the battery box 800. The top end of the battery box 800 can be provided with a cover 900.

[0061] The battery adopts the battery cell assembly of the first aspect of the utility model, when the battery cell 200 that needs to be disassembled appears the fault, not only convenient operation, save time and effort, but also not easy to damage the wiring terminal 204 and the wire harness and other components.

[0062] It should be noted that, since the battery can adopt all the technical solutions of the battery cell assembly of the first aspect of the utility model, it at least has all the beneficial effects brought by the technical solutions of the first aspect of the utility model, and these additional beneficial effects will not be repeated here.

[0063] It can be understood that other configurations and operations of the battery according to the embodiments of the utility model are known to those skilled in the art, and will not be described in detail here.

[0064] The electric vehicle according to the third aspect of the utility model comprises the battery of the second aspect of the utility model.

[0065] The electric vehicle adopts the battery of the second aspect of the utility model, and the battery adopts the battery cell assembly of the first aspect of the utility model, when the battery cell 200 that needs to be disassembled appears the fault, not only convenient operation, save time and effort, but also not easy to damage the wiring terminal 204 and the wire harness and other components.

[0066] It should be noted that, since the electric vehicle can adopt all the technical solutions of the battery cell assembly of the first aspect of the utility model, it at least has all the beneficial effects brought by the technical solutions of the first aspect of the utility model, and these additional beneficial effects will not be repeated here.

[0067] It can be understood that other configurations and operations of the electric vehicle according to the embodiments of the utility model are known to those skilled in the art, and will not be described in detail here.

[0068] The embodiments of the utility model are described in detail above in combination with the drawings, but the utility model is not limited to the above-mentioned embodiments, and various changes can be made within the knowledge range of those skilled in the art without departing from the purpose of the utility model.

Claims

1. An electrochemical cell assembly, comprising: include: A housing, comprising a bottom plate, two first side plates, and two second side plates, wherein the two first side plates are connected to opposite sides of the bottom plate along a first direction, and the two second side plates are respectively provided on opposite sides of the bottom plate along a second direction, and at least one of the second side plates is detachable, wherein the first direction is perpendicular to the second direction; A plurality of battery cells are accommodated in the housing and arranged along the first direction.

2. The cell assembly of claim 1, wherein, Both sides of the second side panel are folded to form folded edges, the folded edges are attached to the outer surface of the adjacent first side panel and connected to the first side panel via a first fastener; and / or, The bottom end of the second side panel is connected to the bottom panel via a second fastener.

3. The cell assembly of claim 1 or 2, wherein, A tab assembly is provided between two adjacent battery cells, wherein the tab assembly includes two fitted first tabs, the two first tabs being respectively connected to the two adjacent battery cells, and the battery cell assembly further includes: A plurality of clamping assemblies, each of which comprises two clamping pieces, each of which is respectively attached to the opposite sides of the two first tabs of the tab assembly, and a third fastener is installed between the two clamping pieces.

4. The cell assembly of claim 3, wherein, The two first tabs of the tab assembly are bent in opposite directions at one end away from the battery core to form a bent portion, the two bent portions are fitted together and clamped between the two clamping pieces, and the bent portion is provided with a connecting hole for the third fastener to pass through.

5. The cell assembly of claim 3, wherein, The battery cell assembly further includes: An insulating top plate is provided at the top of the shell, wherein a plurality of receiving grooves are provided on the top surface of the insulating top plate, an opening is provided at the bottom end of the receiving groove, the tab assembly is passed through the opening, and the clamping assembly is located in the receiving groove; A protective plate covers the insulating top plate, and the protective plate is provided with a plurality of wiring holes.

6. The cell assembly of claim 5, wherein, The two outermost battery cells are each provided with a second pole tab, and the protective plate is formed with a notch corresponding to the second pole tab so as to expose the second pole tab, and the second pole tab is connected to a terminal.

7. The cell assembly of claim 6, wherein, The battery cell assembly further includes: Two insulating partitions are respectively arranged on opposite sides of the two second pole tabs.

8. The cell assembly of claim 1 or 2, wherein, The battery cell assembly further includes: The heat preservation box is sleeved outside the shell, and the heat preservation box includes: Insulated bottom wall; Four heat-insulating side walls are respectively connected to four sides of the heat-insulating bottom wall in a flippable manner; A plurality of adhesive tapes are provided on one of the two adjacent heat-insulating side walls and can be detachably bonded to the other one to achieve connection between the two adjacent heat-insulating side walls.

9. A battery, characterized by include: Battery box; The battery cell assembly according to any one of claims 1 to 8, arranged in the battery box.

10. An electric vehicle, characterized by Comprising the battery of claim 9.

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