Battery cell module, method for assembling battery cell module and battery pack, battery cell module, battery pack, vehicle

Abstract

The present disclosure relates to an assembling method of an electric cell module, an electric cell module, a battery pack, a vehicle, the assembling method of the electric cell module comprising: sequentially stacking a preset number of electric cell bodies along a first direction to form an electric cell column; pasting first end plates at both ends of the electric cell column along the first direction; sequentially arranging two electric cell columns along a second direction and pasting first side cooling plates in heat exchange contact with both of the two electric cell columns between the two electric cell columns; extruding the two end plates towards each other along the first direction to apply a pre-tightening force to the corresponding electric cell column in the first direction; pasting second side cooling plates in heat exchange contact with the corresponding electric cell column on the side of each electric cell column away from the first side cooling plate along the second direction; and releasing the extrusion force after the corresponding second side cooling plate and the electric cell column are firmly pasted, so that the end plate and the second side cooling plate can bear the electric cell body without being connected, thereby simplifying the assembling process and facilitating assembly.

Description

Technical Field

[0001] This disclosure relates to the field of battery cell assembly technology, and in particular to a method for assembling a battery cell module and a battery pack, as well as the battery cell module, the battery pack, and the vehicle. Background Technology

[0002] The battery cell module includes a battery cell, two metal end plates, and two side plates. The two metal end plates are located at both ends of the battery cell along the stacking direction of the battery cell, and the two side plates are located on both sides of the battery cell.

[0003] However, in the relevant technologies, during the assembly of the battery cell module, two metal end plates and two side plates need to be connected together with fasteners in order to support the battery cell. Therefore, the process is complex and cumbersome, resulting in low assembly efficiency. Summary of the Invention

[0004] To address the aforementioned technical issues, this disclosure provides a method for assembling a battery cell module, and a method for assembling a battery cell module and a battery pack.

[0005] In a first aspect, this disclosure provides a method for assembling a battery cell module, the method comprising:

[0006] A predetermined number of battery cells are stacked sequentially along the first direction to form a battery cell column;

[0007] Along the first direction, first end plates are respectively connected to both ends of the battery cell array;

[0008] Two battery cell columns, each connected to a first end plate at both ends, are arranged sequentially along a second direction perpendicular to the first direction. A first side cooling plate is connected between the two battery cell columns. One side of the first side cooling plate is in heat exchange contact with one of the battery cell columns, and the other side of the first side cooling plate is in heat exchange contact with the other battery cell column.

[0009] Along the first direction, the two first end plates corresponding to each of the battery cell rows are pressed toward each other to apply a preload force to the corresponding battery cell rows in the first direction;

[0010] Along the second direction, a second side cooling plate is connected to the side of each of the battery cell rows that is away from the first side cooling plate, wherein the second side cooling plate is in heat exchange contact with the corresponding battery cell row.

[0011] After each of the second side cooling plates is firmly connected to the corresponding battery cell array, the compressive force acting on the first end plate is released to form a battery cell module.

[0012] Optionally, the first side cooling plate is bonded between the two battery cell rows using a first thermally conductive structural adhesive; and / or, each of the second side cooling plates is bonded to the corresponding battery cell row using a second thermally conductive structural adhesive.

[0013] When the first side cooling plate is bonded between the two rows of battery cells using a first thermally conductive structural adhesive, the thickness of the first thermally conductive structural adhesive is 0.2mm-1.2mm.

[0014] When each of the second side cooling plates is attached to the corresponding cell array using the second thermally conductive structural adhesive, the thickness of the second thermally conductive structural adhesive is 0.2mm-1.2mm.

[0015] Optionally, when each of the second side cooling plates is attached to the corresponding cell array using a second thermally conductive structural adhesive, after the step of connecting the second side cooling plates along the second direction on the side of each cell array facing away from the first side cooling plate, the assembly method of the cell module further includes:

[0016] Each of the battery cells is heated to a preset temperature to at least cure the second thermally conductive structural adhesive.

[0017] Optionally, the preset temperature is 20℃-25℃.

[0018] Optionally, at least a portion of the first end plates are respectively attached to the ends of the corresponding cell rows;

[0019] At least a portion of the first end plate is attached to the end of the corresponding cell array using at least one double-sided adhesive tape.

[0020] Optionally, after the two second side cooling plates are connected to the corresponding battery cell rows, the two first end plates corresponding to each battery cell row are pressed together in a direction that brings them closer to each other for at least 5 minutes.

[0021] Optionally, the step of stacking a predetermined number of battery cells sequentially along a first direction to form a battery cell column includes:

[0022] Install reinforcement components;

[0023] A portion of the predetermined number of battery cells are stacked sequentially along the first direction on one side of the reinforcement, and another portion of the predetermined number of battery cells are stacked sequentially along the first direction on the other side of the reinforcement, wherein two battery cells adjacent to the reinforcement are respectively connected to the reinforcement.

[0024] Optionally, the two battery cells adjacent to the reinforcing member are respectively attached to two sides of the reinforcing member.

[0025] Optionally, the two battery cells adjacent to the reinforcement are respectively attached to two sides of the reinforcement using at least one double-sided adhesive.

[0026] At least one of the double-sided adhesives is disposed on the reinforcement and / or the battery cell.

[0027] Optionally, the reinforcing member is a conductive reinforcing member, and two adjacent battery cells are respectively connected to the reinforcing member via second end plates;

[0028] The two sides of each second end plate are respectively attached to the reinforcement and the corresponding battery cell.

[0029] Optionally, at least one of the second end plates is an insulating end plate.

[0030] Optionally, at least a portion of the first end plate is an insulating end plate.

[0031] Secondly, this disclosure provides a battery cell module, which is assembled using the above-described battery cell module assembly method.

[0032] Thirdly, this disclosure provides a battery pack including the cell module as described above.

[0033] Fourthly, this disclosure also provides a method for assembling a battery pack, the method comprising:

[0034] At least a casing adhesive layer shall be applied to the bottom of the receiving slots in the battery pack housing used to house the cell modules;

[0035] The battery cell module as described above is inserted into the receiving groove, and the bottom of the battery cell module is bonded to the adhesive layer of the housing.

[0036] Fifthly, this disclosure provides a vehicle including the cell module as described above or the battery pack as described above.

[0037] The technical solution provided in this disclosure has the following advantages compared with the prior art:

[0038] The battery cell module and battery pack assembly method, battery cell module, battery pack, and vehicle disclosed herein involve stacking a predetermined number of battery cells sequentially along a first direction to form a battery cell column; connecting first end plates to both ends of the battery cell column along the first direction; arranging two battery cell columns with the first end plates connected to both ends sequentially along a second direction perpendicular to the first direction, and connecting a first side cooling plate that is in heat exchange contact with both battery cell columns between the two battery cell columns; pressing the two end plates corresponding to each battery cell column towards each other along the first direction to apply a preload force to the two battery cell columns in the first direction; and maintaining the preload force in the first direction... Based on this, a second side cooling plate that is in heat exchange contact with the corresponding battery cell column is connected to the side of each battery cell column opposite to the first side cooling plate along the second direction; after each second side cooling plate is firmly connected to the corresponding battery cell column, the compressive force acting on the first end plate is released, thereby forming a battery cell module with a certain pre-tightening force. In this way, during the assembly process of the battery cell module, the first end plate at both ends of the battery cell column and the second side cooling plates on both sides of the battery cell column do not need to be connected with additional fasteners, and can jointly bear the load of the battery cell column, i.e., jointly support the assembly, simplifying the assembly process of the battery cell module, facilitating assembly, and improving the assembly efficiency of the battery cell module.

[0039] In addition, within the same assembly space, it also provides more assembly space for the cell module, which to some extent reduces the overall thickness and weight of the battery module, meeting the design requirements for long driving range. Attached Figure Description

[0040] The accompanying drawings, which are incorporated in and form a part of this specification, illustrate embodiments consistent with this disclosure and, together with the description, serve to explain the principles of this disclosure.

[0041] To more clearly illustrate the technical solutions in the embodiments of this disclosure or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0042] Figure 1 This is a schematic flowchart of the assembly method for the battery cell module described in the embodiments of this disclosure;

[0043] Figure 2 This is a schematic diagram of the structure of a battery module assembled using the cell module assembly method described in the embodiments of this disclosure within a battery pack;

[0044] Figure 3 This is a schematic diagram of assembling a battery cell module using the assembly method described in the embodiments of this disclosure. Figure 1 ;

[0045] Figure 4 This is a schematic diagram of assembling a battery cell module using the assembly method described in the embodiments of this disclosure. Figure 2 ;

[0046] Figure 5 This is a schematic diagram of assembling a battery cell module using the assembly method described in the embodiments of this disclosure. Figure 3 ;

[0047] Figure 6 This is a schematic diagram of assembling a battery cell module using the assembly method described in the embodiments of this disclosure. Figure 4 ;

[0048] Figure 7 This is a schematic diagram of assembling a battery cell module using the assembly method described in the embodiments of this disclosure. Figure 5 ;

[0049] Figure 8 This is a schematic diagram of the structure of a battery module assembled using the cell module assembly method described in the embodiments of this disclosure;

[0050] Figure 9 This disclosure provides a schematic diagram of the assembly of the reinforcing member and two adjacent battery cells in the battery cell module assembly method of the present embodiment.

[0051] Figure 10 Another assembly diagram of the reinforcing member and two adjacent battery cells in the battery cell module assembly method of the present disclosure embodiment;

[0052] Figure 11 A schematic diagram of the casing adhesive layer in the battery pack assembly method described in this embodiment.

[0053] Among them, 10 is the battery module; 1 is the cell array; 11 is the cell body; 2 is the first end plate; 3 is the first side cooling plate; 4 is the second side cooling plate; 5 is the reinforcing component; 6 is the second end plate; 20 is the battery pack housing; 30 is the receiving groove; 40 is the housing adhesive layer; 50 is the crossbeam; and 60 is the longitudinal beam. Detailed Implementation

[0054] To better understand the above-mentioned objectives, features, and advantages of this disclosure, the solutions disclosed herein will be further described below. It should be noted that, unless otherwise specified, the embodiments and features described herein can be combined with each other.

[0055] Numerous specific details are set forth in the following description in order to provide a full understanding of this disclosure, but this disclosure may also be implemented in other ways different from those described herein; obviously, the embodiments in the specification are only some, and not all, of the embodiments of this disclosure.

[0056] Example 1

[0057] This embodiment provides a method for assembling a battery cell module, referencing... Figures 1 to 11 As shown, the assembly method of the battery cell module includes:

[0058] S101. A preset number of battery cells 11 are stacked and arranged sequentially along the first direction to form a battery cell column 1.

[0059] The stacking direction of the battery cell body 11 is formed along the length direction of the battery cell row 1, that is, the first direction is the length direction of the battery cell row 1, as shown in the reference. Figure 2 and Figure 4 The X-direction in the middle.

[0060] In this design, no assembly gap is required between each cell 11 in the cell array 1, resulting in high space utilization. More cells 11 can be accommodated in the same battery pack, thereby increasing the capacity of the battery module 10 in the battery pack. This helps to achieve a large capacity of the battery module 10 and a long driving range for vehicles equipped with the battery module 10.

[0061] S102, Reference Figure 4 As shown, along the first direction, the first end plate 2 is connected to both ends of the cell array 1.

[0062] First end plates 2 are respectively provided at both ends of the cell array 1. Since the first end plates 2 are non-conductive, the electrical insulation performance of the cell assembly is improved. At the same time, the first end plates 2 are made of insulating materials such as plastic, which have good heat preservation effect, improving the heat preservation performance of the cell module, which helps to achieve a large capacity of the battery module 10 and a long driving range of the vehicle with the battery module 10.

[0063] S103, Reference Figure 5 and Figure 6 As shown, two battery cell arrays 1, each connected to a first end plate 2 at both ends, are arranged sequentially along a second direction perpendicular to the first direction, and a first side cooling plate 3 is connected between the two battery cell arrays 1. One side of the first side cooling plate 3 is in heat exchange contact with one of the battery cell arrays 1, and the other side of the first side cooling plate 3 is in heat exchange contact with the other battery cell array 1.

[0064] It should be noted that the second direction is a horizontal direction perpendicular to the first direction. The two cell rows 1 are arranged side by side along the second direction, that is, the second direction is the width direction of the cell row 1. (Refer to...) Figure 2 and Figure 4 The Y-direction in the middle.

[0065] During the assembly of the first side cooling plate 3, tooling can be used. For example, the first side cooling plate 3 can be fixed on the tooling, and then two pre-stacked battery cell arrays 1 can be pushed onto the first side cooling plate 3. The tooling can press the two battery cell arrays 1 along the second direction, i.e., the Y direction, so that one side of the second side cooling plate 4 abuts against one of the battery cell arrays 1 and makes heat exchange contact with it, and the other side of the first side cooling plate 3 abuts against the other battery cell array 1 and makes heat exchange contact with it.

[0066] The first side cooling plate 3 can not only connect the two battery cell rows 1 in the Y direction, but also connect and assemble multiple battery cells 11 of each battery cell row 1 in the X direction.

[0067] In a practical implementation, two battery cell arrays 1 can be arranged sequentially along the second direction, and a first side cooling plate 3 can be connected between the two battery cell arrays 1. One side of the first side cooling plate 3 is in heat exchange contact with one of the battery cell arrays 1, and the other side of the first side cooling plate 3 is in heat exchange contact with the other battery cell array 1. Then, a first end plate 2 can be connected to the two ends of the two battery cell arrays 1 respectively.

[0068] S104, Reference Figure 6 As shown, along the first direction, the two first end plates 2 corresponding to each cell column 1 are pressed toward each other in a direction that brings them closer together, so as to apply a preload force to the corresponding cell column 1 in the first direction.

[0069] In practice, for example, tooling can be used to press the two end plates at both ends of each cell array 1 along the first direction, i.e., the X direction, to apply a certain preload to the two cell arrays 1 in the X direction.

[0070] In this process, the two end plates at both ends of each cell row 1 are pressed along the X direction for a certain period of time, so that the preload applied in the X direction is maintained for a certain period of time.

[0071] Additionally, it should be noted that the magnitude of the compressive force applied to the first end plate 2 is related to the chemical volume, size, etc. of the battery cell 11.

[0072] S105, Reference Figure 7 and Figure 8 As shown, along the second direction, a second side cooling plate 4 is connected to the side of each cell column 1 facing away from the first side cooling plate 3, wherein the second side cooling plate 4 is in heat exchange contact with the corresponding cell column 1.

[0073] In a specific implementation, while maintaining the preload in the X direction, a second side cooling plate 4 is connected to the side of the two cell arrays 1 facing away from the first side cooling plate 3, so that the second side cooling plate 4 can further connect and assemble the multiple cell bodies 11 of the cell array 1 with a certain preload in the X direction.

[0074] S106. After each second side cooling plate 4 is firmly connected to the corresponding battery cell row 1, the squeezing pressure acting on the first end plate 2 is released to form a battery cell module.

[0075] After the two second side cooling plates 4 are firmly connected to the sides of the two cell arrays 1 that are away from the first side cooling plate 3, the compressive force in the X direction is released. At this time, the two second side cooling plates 4 further connect the two cell arrays 1 that have a certain loading force in the X direction, so that the two second side cooling plates 4 and the two first end plates 2 can be assembled together without having to connect the two second side cooling plates 4 to the two first end plates 2. This simplifies the assembly process of the cell module and improves the assembly efficiency. At the same time, since there is no need to set a connection structure between the two second side cooling plates 4 and the two first end plates 2, the cost is saved to a certain extent.

[0076] The battery cell module assembly method disclosed herein involves stacking a predetermined number of battery cells 11 sequentially along a first direction to form a battery cell array 1; connecting first end plates 2 to both ends of the battery cell array 1 along the first direction; arranging two battery cell arrays 1 with the first end plates 2 connected to both ends sequentially along a second direction perpendicular to the first direction, and connecting a first side cooling plate 3 that is in heat exchange contact with both battery cell arrays 1 between the two battery cell arrays 1; pressing the two end plates corresponding to each battery cell array 1 toward each other along the first direction to apply a preload force to the two battery cell arrays 1 in the first direction; and, while maintaining the preload force in the first direction, pressing along the second direction... A second side cooling plate 4, which is in heat exchange contact with the corresponding cell row 1, is connected to the side of each cell row 1 facing away from the first side cooling plate 3. After each second side cooling plate 4 is firmly connected to the corresponding cell row 1, the compressive force acting on the first end plate 2 is released, thereby forming a cell module with a certain pre-tightening force. In this way, during the assembly process of the cell module, the first end plate 2 at both ends of the cell row 1 and the second side cooling plates 4 on both sides of the cell row 1 do not need to be connected by additional fasteners, and can jointly bear the load of the cell row 1, i.e., jointly support the assembly, simplifying the assembly process of the cell module, facilitating assembly, and improving the assembly efficiency of the cell module. At the same time, within the same assembly space, it also provides a larger assembly space for the cell module, which to a certain extent reduces the overall thickness and weight of the battery module 10, meeting the design requirements of long driving range.

[0077] In some embodiments of this invention, the first side cooling plate 3 may be attached between the two battery cell rows 1 by means of a first thermally conductive structural adhesive, and the first thermally conductive structural adhesive may be applied to the first side cooling plate 3 and / or the two battery cell rows 1.

[0078] In practice, the first thermally conductive structural adhesive can be pre-applied to the first side cooling plate 3 or to the battery cell array 1. Of course, the first thermally conductive structural adhesive can also be applied to both the first side cooling plate 3 and the battery cell array 1. The choice can be made arbitrarily according to the specific operating conditions, and no further restrictions are imposed here.

[0079] The first side cooling plate 3 is disposed between the two battery cell rows 1 by means of a first thermally conductive structural adhesive. In this way, the first side cooling plate 3 not only serves to connect the two battery cell rows 1, but also connects the multiple battery cells 11 of each battery cell row 1 together. At the same time, the first side cooling plate 3 is in heat exchange contact with both battery cell rows 1, that is, the first side cooling plate 3 can also exchange heat with the two battery cell rows 1, thereby improving the heat exchange efficiency of the two battery cell rows 1.

[0080] The thickness of the first thermally conductive structural adhesive can be, for example, 0.2mm-1.2mm, with high bonding strength, resulting in high structural stability between the first side cooling plate 3 and the two battery cell rows 1.

[0081] In some embodiments, each second side cooling plate 4 may be attached to the corresponding cell array 1 by means of a second thermally conductive structural adhesive, wherein the second thermally conductive structural adhesive is disposed on the side of the second side cooling plate 4 and / or the corresponding cell array 1 facing away from the first side cooling plate 3.

[0082] In practice, the second thermally conductive structural adhesive can be pre-applied to the second side cooling plate 4, or pre-applied to the side of each cell row 1 facing away from the first side cooling plate 3. Of course, the second thermally conductive structural adhesive can also be applied to both the second side cooling plate 4 and the side of each cell row 1 facing away from the first side cooling plate 3. The choice can be made arbitrarily according to the specific operating conditions, and no further restrictions are imposed here.

[0083] The second side cooling plate 4 and the corresponding cell array 1 are bonded together by the second thermally conductive structural adhesive. In this way, the second side cooling plate 4 not only serves to connect the multiple cell bodies 11 of each cell array 1, but also has heat exchange contact with the corresponding cell array 1. That is to say, the second side cooling plate 4 can also exchange heat with the corresponding cell array 1, which further improves the heat exchange efficiency of the cell module.

[0084] Meanwhile, the second side cooling plate 4 also has the function of maintaining the preload of each cell module in the X direction, which helps to increase the stacking strength between each cell body 11 in each cell row 1, making the cell module structural strength higher.

[0085] The thickness of the second thermally conductive structural adhesive can be, for example, 0.2mm-1.2mm, with high bonding strength, resulting in high structural stability between the first side cooling plate 3 and the two battery cell rows 1.

[0086] In practice, the first thermally conductive structural adhesive and the second thermally conductive structural adhesive can be, for example, epoxy resin adhesive, polyurethane, etc.

[0087] In some embodiments, at least a portion of the first end plate 2 is respectively pasted to the end of the corresponding cell column 1, for example, by being glued to the end of the corresponding cell column 1 with double-sided adhesive. The structure is simple and the connection is convenient.

[0088] In practice, at least part of the first end plate 2 is an insulating end plate, which has good insulation and heat preservation effects.

[0089] In some embodiments, when the second side cooling plate 4 is respectively attached to the corresponding cell array 1 using the second thermally conductive structural adhesive, after step S106, the assembly method of the cell module further includes:

[0090] S107. Heat each cell array 1 to a preset temperature to at least cure the second thermally conductive structural adhesive, thereby shortening the bonding and curing time between the second side cooling plate 4 and the cell array 1 and improving assembly efficiency.

[0091] When the first side cooling plate 3 is bonded between the two battery cell rows 1 using the first thermally conductive structural adhesive, the first thermally conductive structural adhesive can also be cured when each battery cell row 1 is heated to a preset temperature in step S107.

[0092] After the second side cooling plate 4 is attached to the battery cell array 1, heating devices such as heating boxes or laser heaters can be used to heat each battery cell array 1 to accelerate the curing speed of the second thermally conductive silicone and the first thermally conductive silicone, which can further improve the assembly efficiency of the battery cell module.

[0093] In some embodiments, the first thermally conductive silicone layer and the second thermally conductive silicone layer can be locally heated at high temperatures, eliminating the need for overall heating of the battery cell module and saving costs.

[0094] In practice, the preset temperature can be, for example, 20℃-25℃.

[0095] In some embodiments, after the two second side cooling plates 4 are connected to the corresponding battery cell array 1, the two first end plates 2 corresponding to each battery cell array 1 are pressed towards each other for at least 5 minutes to achieve higher bonding strength.

[0096] In some embodiments, step S101 specifically includes:

[0097] S1011, Set reinforcement component 5.

[0098] The outer contour of the reinforcing member 5 is not larger than the outer contour of the battery cell 11. Preferably, the outer contour of the reinforcing member 5 is designed to conform to the shape of the battery cell 11 for easy connection.

[0099] S1012. A portion of the preset number of battery cells 11 are stacked sequentially on one side of the reinforcing member 5 along the first direction, and another portion of the preset number of battery cells 11 are stacked sequentially on the other side of the reinforcing member 5 along the first direction, wherein two battery cells 11 adjacent to the reinforcing member 5 are respectively connected to the reinforcing member 5.

[0100] refer to Figure 4 , Figure 9 and Figure 10 As shown, with the reinforcing member 5 as the reference position for stacking the battery cells 11, in the X direction, along the direction close to the reinforcing member 5 to the direction away from the reinforcing member 5, some of the battery cells 11 are stacked sequentially on one side of the reinforcing member 5 in the first direction, and another part of the battery cells 11 are stacked sequentially on the other side of the reinforcing member 5. Among them, two battery cells 11 adjacent to the reinforcing member 5 are respectively connected to the reinforcing member 5.

[0101] By setting the reinforcing member 5 in the middle, the length of the cell array 1 can be increased, which in turn allows the length of the cell module to be increased. At the same time, the reinforcing member 5 also ensures the strength and rigidity of the longer cell module, which meets the design requirements of long driving range, and facilitates the assembly of the cell module into the box.

[0102] In practice, the two battery cells 11 adjacent to the reinforcing member 5 are respectively attached to the two sides of the reinforcing member 5, resulting in a simple structure that is easy to assemble. Furthermore, the connection between the battery cell 11 and the reinforcing member 5 does not compromise their structural strength.

[0103] In some embodiments, two battery cells 11 adjacent to the reinforcing member 5 are respectively attached to two sides of the reinforcing member 5 by at least one double-sided adhesive.

[0104] In practice, the two battery cells 11 adjacent to the reinforcing member 5 can be respectively attached to the two sides of the reinforcing member 5 by a single ring-shaped double-sided adhesive strip, or they can be respectively attached by multiple double-sided adhesive strips spaced apart along the circumference of the reinforcing member 5 or the battery cell 11.

[0105] The double-sided adhesive can be applied to the reinforcing member 5 and / or the battery cell 11. In other words, the double-sided adhesive connecting the battery cell 11 and the reinforcing member 5 can be applied to both the battery cell 11 and the reinforcing member 5. Of course, double-sided adhesive strips can also be applied to both the battery cell 11 and the reinforcing member 5 at the same time.

[0106] In some embodiments, the reinforcing member 5 is a conductive reinforcing member 5, which has high structural strength and connection strength. In this case, the two battery cells 11 adjacent to the conductive reinforcing member 5 are respectively connected to the reinforcing member 5 with second end plates 6, which facilitates connection and provides high structural strength.

[0107] In practice, at least one second end plate 6 is an insulating end plate, which has good insulation and heat preservation effects.

[0108] The two sides of the second end plate 6 can be bonded to the reinforcing member 5 and the corresponding battery cell 11 respectively by double-sided adhesive or liquid adhesive, which makes the connection convenient and the fit good.

[0109] Example 2

[0110] refer to Figures 2 to 11 As shown in the figure, this embodiment provides a battery cell module, which is assembled using the battery cell module assembly method of Embodiment 1.

[0111] In the battery cell module provided in this embodiment, there is a first side cooling plate 3 between every two adjacent battery cell rows 1, and there are second side cooling plates 4 on the phase back sides of the two adjacent battery cell rows 1 respectively. In this way, the working heat of the battery cell module can be dissipated not only by heat exchange with the first side cooling plate 3, but also by heat exchange with the second side cooling plate 4, thereby improving the heat exchange efficiency of the battery cell module.

[0112] Furthermore, a bottom cooling plate is provided at the bottom of the battery module 10. The bottom cooling plate is in heat exchange contact with the bottom of each cell row 1. The working heat of the cell module can also be dissipated by heat exchange with the bottom cooling plate, which further improves the heat exchange efficiency and heat dissipation performance of the cell module and helps to meet the design requirements of high-power fast charging heat dissipation.

[0113] In specific implementation, since the battery cell module provided in this embodiment is assembled by the battery cell module assembly method provided in embodiment one, the battery cell module is jointly supported by the first end plate 2 at both ends of the battery cell column 1 and the second side cooling plate 4 on both sides of the battery cell column 1, without the need to specially set side plates, thereby providing a larger assembly space for the battery cell module and high space utilization.

[0114] The battery cell module in this embodiment is assembled using the battery cell module assembly method provided in Embodiment 1. Its specific technical features are the same as in Embodiment 1, and it brings the same or similar technical effects, which will not be repeated here. Please refer to the description in Embodiment 1 for details.

[0115] Example 3

[0116] This embodiment provides a battery pack, which includes a cell module.

[0117] The battery cell module in this embodiment has the same specific structure and implementation principle as the battery cell module provided in Embodiment 2, and can bring the same or similar technical effects. It will not be described in detail here. For details, please refer to the description of the above embodiments.

[0118] Example 4

[0119] This embodiment provides a method for assembling a battery pack, the method comprising:

[0120] Step 1, refer to Figure 11 As shown, at least the bottom of the receiving groove 30 for accommodating the battery cell module in the battery pack housing 20 is coated with a housing adhesive layer 40.

[0121] Step 2: The battery cell module assembled using the battery cell module assembly method provided in Example 1 is placed into the receiving groove 30, and the bottom of the battery cell module is bonded to the casing adhesive layer 40.

[0122] refer to Figure 1 and Figure 11 As shown, the battery pack housing 20 is provided with two crossbeams 50 and two longitudinal beams 60. The two crossbeams 50 are arranged at intervals along the X direction, and the two longitudinal beams 60 are arranged at intervals along the Y direction. The two ends of the two longitudinal beams 60 are respectively connected to the two crossbeams 50. That is to say, the two crossbeams 50 and the two longitudinal beams 60 are arranged intersectingly and perpendicularly to each other in the battery pack housing 20.

[0123] Two crossbeams 50, two longitudinal beams 60, the side frame of the battery pack housing 20, and the bottom protective plate of the battery pack housing 20 together form three receiving slots 30 for accommodating the battery module 10. Each receiving slot 30 is used to accommodate a battery module 10 assembled using the cell module assembly method provided in Embodiment 1.

[0124] When assembling the battery pack, first apply the box adhesive layer 40 to the bottom of the three receiving slots 30, and then put the battery module 10 into the box. Specifically, the bottom of the battery module 10 is bonded to the box adhesive layer 40.

[0125] When the battery module 10 generates expansion force after cycling, the two crossbeams 50 can be used to bear the expansion force of the battery module 10.

[0126] In some embodiments, the reinforcement 5 in the middle of the cell module can be connected to the bottom of the battery box by fasteners such as bolts.

[0127] The battery cell module in this embodiment is assembled using the battery cell module assembly method provided in Embodiment 1. Its specific technical features are the same as those in the above embodiments, and it brings the same or similar technical effects, which will not be repeated here. Please refer to the description of the above embodiments for details.

[0128] Example 5

[0129] This embodiment provides a vehicle that includes a battery cell module or a battery pack.

[0130] The battery cell module in this embodiment has the same specific structure and implementation principle as the battery cell module provided in Embodiment 2, and can bring the same or similar technical effects. It will not be described in detail here. For details, please refer to the description of the above embodiments.

[0131] The battery pack in this embodiment has the same specific structure and implementation principle as the battery pack provided in Embodiment 3, and can bring the same or similar technical effects. It will not be described in detail here. For details, please refer to the description of the above embodiments.

[0132] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0133] The above description is merely a specific embodiment of this disclosure, enabling those skilled in the art to understand or implement it. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this disclosure. Therefore, this disclosure is not to be limited to the embodiments described herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A method for assembling a battery cell module, characterized in that, The method includes: A predetermined number of battery cells are stacked sequentially along the first direction to form a battery cell column; Along the first direction, first end plates are respectively connected to both ends of the battery cell array; Two battery cell columns, each connected to a first end plate at both ends, are arranged sequentially along a second direction perpendicular to the first direction. A first side cooling plate is connected between the two battery cell columns. One side of the first side cooling plate is in heat exchange contact with one of the battery cell columns, and the other side of the first side cooling plate is in heat exchange contact with the other battery cell column. Along the first direction, the two first end plates corresponding to each of the battery cell rows are pressed toward each other to apply a preload force to the corresponding battery cell rows in the first direction; Along the second direction, a second side cooling plate is connected to the side of each of the battery cell rows that is away from the first side cooling plate, wherein the second side cooling plate is in heat exchange contact with the corresponding battery cell row. After each of the second side cooling plates is firmly connected to the corresponding battery cell array, the compressive force acting on the first end plate is released to form a battery cell module.

2. The assembly method of the battery cell module according to claim 1, characterized in that, The first side cooling plate is bonded between the two rows of cells using a first thermally conductive structural adhesive; and / or, Each of the second side cooling plates is attached to the corresponding cell array using a second thermally conductive structural adhesive.

3. The assembly method of the battery cell module according to claim 2, characterized in that, When the first side cooling plate is bonded between the two rows of battery cells using a first thermally conductive structural adhesive, the thickness of the first thermally conductive structural adhesive is 0.2mm-1.2mm. When each of the second side cooling plates is attached to the corresponding cell array using the second thermally conductive structural adhesive, the thickness of the second thermally conductive structural adhesive is 0.2mm-1.2mm.

4. The assembly method of the battery cell module according to claim 1, characterized in that, When each of the second side cooling plates is respectively attached to the corresponding cell array using the second thermally conductive structural adhesive, after the step of connecting the second side cooling plates to the side of each cell array facing away from the first side cooling plate along the second direction, the assembly method of the cell module further includes: Each of the battery cells is heated to a preset temperature to at least cure the second thermally conductive structural adhesive.

5. The assembly method of the battery cell module according to claim 4, characterized in that, The preset temperature is 20℃-25℃.

6. The assembly method of the battery cell module according to claim 1, characterized in that, At least a portion of the first end plate is respectively attached to the end of the corresponding cell row; and / or, After the two second side cooling plates are connected to the corresponding battery cell rows, the two first end plates corresponding to each battery cell row are pressed together in a direction that brings them closer to each other for at least 5 minutes.

7. The assembly method of the battery cell module according to claim 1, characterized in that, The step of stacking a predetermined number of battery cells sequentially along a first direction to form a battery cell column includes: Install reinforcement components; A portion of the predetermined number of battery cells are stacked sequentially along the first direction on one side of the reinforcement, and another portion of the predetermined number of battery cells are stacked sequentially along the first direction on the other side of the reinforcement, wherein two battery cells adjacent to the reinforcement are respectively connected to the reinforcement.

8. The assembly method of the battery cell module according to claim 7, characterized in that, The two battery cells adjacent to the reinforcing member are respectively attached to the two sides of the reinforcing member.

9. The assembly method of the battery cell module according to claim 8, characterized in that, The two battery cells adjacent to the reinforcing member are respectively attached to two sides of the reinforcing member by at least one double-sided adhesive. At least one of the double-sided adhesives is disposed on the reinforcement and / or the battery cell.

10. The assembly method of the battery cell module according to claim 7, characterized in that, The reinforcing member is a conductive reinforcing member, and two battery cells adjacent to the reinforcing member are respectively connected to the reinforcing member with a second end plate; The two sides of each second end plate are respectively attached to the reinforcement and the corresponding battery cell.

11. A battery cell module, characterized in that, The battery cell module is assembled using the battery cell module assembly method as described in any one of claims 1 to 10.

12. A battery pack, characterized in that, Including the battery cell module as described in claim 11.

13. A method for assembling a battery pack, characterized in that, The method includes: At least a casing adhesive layer shall be applied to the bottom of the receiving slots in the battery pack housing used to house the cell modules; The battery cell module as described in claim 11 is assembled into the receiving groove, and the bottom of the battery cell module is bonded to the adhesive layer of the housing.

14. A vehicle, characterized in that, This includes the cell module as described in claim 11 or the battery pack as described in claim 12.

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