Battery cell assembly, battery pack and battery pack

Abstract

The utility model provides a battery cell assembly, a battery pack and a battery pack. The battery cell assembly comprises at least two battery cells, and the first end of each battery cell is provided with a pole; and the integrated busbar is electrically connected with the pole of the battery cell, the integrated busbar comprises an insulating bracket main body close to the first end, and the insulating bracket main body comprises a first sub main body and a second sub main body which are detachably connected with each other. According to the battery cell assembly, the battery pack and the battery pack provided by the invention, through the first sub-main body and the second sub-main body which are detachably connected with each other, the insulating bracket main body with a relatively long length can be constructed to cover a relatively large number of battery cells, and a structural basis is provided for reducing the preparation cost of an integrated busbar, so that the preparation cost of the battery cell assembly is favorably reduced; and batch production is facilitated.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of power batteries, and in particular to a battery cell assembly, a battery pack and a battery pack. BACKGROUND

[0002] With the increasing demand for the driving range of new energy vehicles, in order to meet the power requirement, more monomer battery cells need to be connected in series in the battery pack used by the new energy vehicles.

[0003] In the related art, in order to connect the plurality of monomer battery cells in the battery pack in series with each other, a busbar device (including a busbar and a circuit board, etc.) capable of being electrically connected with the pole of the battery cell is needed to be arranged, and an insulating support is arranged between the busbar device and the surface of the battery cell main body. However, when the number of monomer battery cells in the battery pack is stacked, the length of the battery cell stack will be longer, and the insulating support is limited by the preparation process, and it is difficult to form a monomer with a longer length. CONTENT OF THE UTILITY MODEL

[0004] Therefore, the purpose of the present application is to provide a battery cell assembly, a battery pack and a battery pack to at least partially solve the problem that the number of stacked battery cells in the battery cell stack is limited by the structure of the insulating support.

[0005] To achieve the above purpose, the first aspect of the present application provides a battery cell assembly, comprising: at least two battery cells, each of the battery cells being provided with a pole at a first end; an integrated busbar being electrically connected with the pole of the battery cell, the integrated busbar comprising an insulating support main body close to the first end, the insulating support main body comprising a first sub-main body and a second sub-main body which are detachably connected with each other.

[0006] Optionally, the first sub-main body and the second sub-main body are connected through a connecting assembly; the first sub-main body has a first connecting surface, the second sub-main body has a second connecting surface, and the connecting assembly is located on the first connecting surface and / or the second connecting surface.

[0007] Optionally, the connecting assembly comprises a plug-in post formed on the first connecting surface and a plug-in sleeve formed on the second connecting surface, and the plug-in post is adapted to be arranged in the plug-in sleeve.

[0008] Optionally, the battery cell assembly comprises at least two battery cell stacks which are arranged at intervals along the stacking direction of the battery cells in the battery cell stack, and the at least two battery cell stacks are electrically connected through the integrated busbar; the first sub-main body and the second sub-main body each correspond to one of the battery cell stacks, and the connecting assembly is located between the adjacent two battery cell stacks.

[0009] Optionally, a middle plate is connected between two adjacent cell stacks, the first end is a top end of the cell, and along a height direction of the cell, a top of the middle plate is located below the first end to form a space between the two adjacent cell stacks, and the connecting assembly is arranged corresponding to the middle plate, and at least part of the connecting assembly is located in the space.

[0010] Optionally, the integrated busbar includes a bar piece electrically connected to the pole of each of the two cells respectively, a surface of the insulating support body away from the first end is provided with a mounting groove, a groove bottom of the mounting groove is provided with at least two connecting through holes, the bar piece is arranged in the mounting groove and electrically connected to the pole through the connecting through holes, and at least one side groove wall of the mounting groove is formed with a protruding limiting protrusion, and the limiting protrusion is in abutment with a surface of the bar piece away from the pole.

[0011] Optionally, the cell assembly includes a first cell stack corresponding to the first sub-body and a second cell stack corresponding to the second sub-body, the bar piece includes a cross bar piece arranged above the connecting assembly, the first cell stack and the second cell stack are electrically connected through the cross bar piece, and the first connecting surface and the second connecting surface are located below the cross bar piece.

[0012] Optionally, a surface of the limiting protrusion away from the groove bottom of the mounting groove is inclined to the groove bottom of the mounting groove.

[0013] Optionally, the insulating support body is provided with a monitoring through hole penetrating through a thickness direction of the insulating support body, a sensor is adapted to pass through the monitoring through hole and be connected to the cell, and the integrated busbar further includes a protective cover detachably connected to the insulating support body, the protective cover covers the monitoring through hole and the sensor.

[0014] Optionally, the first sub-body and / or the second sub-body is a plastic suction structure.

[0015] Based on the same inventive concept, the second aspect of the present application further provides a battery pack comprising the cell assembly according to the first aspect.

[0016] Based on the same inventive concept, the third aspect of the present application further provides a battery pack comprising the cell assembly according to the first aspect.

[0017] It can be seen from the above that the battery cell assembly, the battery pack and the battery pack provided by the application can be configured into an insulating support body with a relatively long length through the detachable connection of the first sub-body and the second sub-body, so as to cover a relatively large number of battery cells. At the same time, since the integrated busbar including the insulating support body can be electrically connected with the pole of the battery cell, all the battery cells in the battery cell assembly can be connected in series, so as to meet the high power requirement.

[0018] At the same time, since the length of each of the first sub-body and the second sub-body can be designed to be relatively short, the preparation mode of the first sub-body and the second sub-body is relatively flexible, which can provide a structural basis for reducing the preparation cost of the integrated busbar, thereby helping to reduce the preparation cost of the battery cell assembly and being suitable for mass production. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the application or the related art, the drawings needed to be used in the embodiments or the related art description will be briefly introduced. Obviously, the drawings in the following description are only embodiments of the application, and other drawings can be obtained by those skilled in the art without creative labor.

[0020] Figure 1 It is a schematic view of the battery cell assembly of the embodiment of the application;

[0021] Figure 2 It is a top view schematic view of the battery cell assembly of the embodiment of the application;

[0022] Figure 3 It is Figure 2 a partial cross-sectional view of the C-C section in FIG. 1;

[0023] Figure 4 It is Figure 3 an enlarged schematic view of the D part in FIG. 1;

[0024] Figure 5 It is a partial exploded schematic view of the battery cell assembly of the embodiment of the application;

[0025] Figure 6 It is a side view schematic view of the battery cell assembly of the embodiment of the application;

[0026] Figure 7 It is Figure 1 an enlarged schematic view of the A part in FIG. 2;

[0027] Figure 8 It is Figure 2 a cross-sectional view of the B-B section in FIG. 2.

[0028] BRIEF DESCRIPTION OF DRAWINGS

[0029] 100, cell stack; 110, cell; 111, first end; 112, pole; 100a, first cell stack; 100b, second cell stack;

[0030] 200, integrated busbar; 210, insulating support body; 211, first sub-body; 2111, first connecting surface; 212, second sub-body; 2121, second connecting surface; 213, connecting through hole; 214, connecting assembly; 2141, plug-in post; 2142, plug-in sleeve; 215, mounting groove; 216, limiting protrusion; 217, monitoring through hole; 220, protective cover; 230, jumper pad; 240, pad; 241, external connection part; 242, jumper part;

[0031] 400, end plate; 500, avoidance space; 600, middle plate; 700, sensor. DETAILED DESCRIPTION

[0032] In order to make the objects, technical solutions and advantages of the present application clearer, the present application will be further described in detail below with reference to the drawings and specific embodiments.

[0033] It should be noted that the relative arrangement of the components, numerical expressions and values set forth in these embodiments do not limit the scope of the present application unless otherwise specifically stated.

[0034] At the same time, it should be understood that the sizes of the various parts shown in the drawings are not drawn in accordance with the actual proportional relationship for the convenience of description.

[0035] The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the application or its application or uses.

[0036] It should be noted that, unless otherwise defined, the technical terms or scientific terms used in the embodiments of the present application should be understood as the usual meaning understood by those skilled in the art to which the present application belongs. The terms "first", "second" and similar words used in the embodiments of the present application do not represent any order, number or importance, but are only used to distinguish different components. The terms "include" or "contain" and similar words mean that the elements or objects before the word cover the elements or objects listed after the word and their equivalents, without excluding other elements or objects. The terms "connect" or "connected" and similar words are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to represent relative positional relationships, and when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0037] In order to meet the power demand of the battery pack, the length of the single-column stacked battery cells 110 in the battery pack can be more than two meters. Correspondingly, in order to enable the insulating support to completely cover the top of the battery cell 110, the length of the insulating support cannot be less than the length of the single-column stacked battery cell 110.

[0038] However, the applicant finds that when the length of the insulating support exceeds two meters, it is difficult to form an integrally formed structure meeting the length requirement by using general preparation processes and equipment; if special process equipment is developed for the preparation of the insulating support with a length exceeding two meters, a large amount of cost will be consumed, and the process is relatively complex.

[0039] The applicant finds that if the insulating support is designed as a multi-segment structure, each segment is prepared separately by using general processes and equipment, and the multi-segment structure is spliced into a whole meeting the length requirement after preparation, the above problems can be solved.

[0040] Therefore, the embodiments of the present application provide a battery cell assembly.

[0041] Figure 1 a schematic view of the battery cell assembly is shown, Figure 2 a top view of the battery cell assembly is shown, Figure 3 a schematic view of Figure 2 a partial cross-sectional view of the C-C section.

[0042] As Figure 1 , Figure 2 and Figure 3 , the battery cell assembly comprises: at least two battery cells 110, each battery cell 110 being provided with a pole 112 at a first end 111; an integrated busbar 200 electrically connected with the pole 112 of the battery cell 110, the integrated busbar 200 comprising an insulating support body 210 close to the first end 111, the insulating support body 210 comprising a first sub-body 211 and a second sub-body 212 which are detachably connected with each other.

[0043] Exemplarily, the integrated busbar 200 comprises a bar plate 240, the bar plate 240 being arranged on a side of the insulating support body 210 away from the first end 111, and the bar plate 240 being electrically connected with the pole 112 through a through hole formed in the insulating support body 210.

[0044] Exemplarily, the material of the insulating support body 210 is an insulating material.

[0045] Exemplarily, the first end 111 of each battery cell 110 is provided with two poles 112, one of the two poles 112 being a positive pole and the other being a negative pole. The bar plate 240 is electrically connected with the positive pole of one battery cell 110 and the negative pole of another battery cell 110 respectively, so that the two battery cells 110 are connected in series.

[0046] Exemplarily, the electric cell 110 can include an electric cell body, the first end 111 can be a top end of the electric cell body, and the pole 112 can protrude from a top end surface of the electric cell body.

[0047] Exemplarily, the first sub-body 211 and the second sub-body 212 each cover a plurality of electric cells 110.

[0048] Exemplarily, the first sub-body 211 and the second sub-body 212 can be connected by adhesion, insertion or clamping, etc.

[0049] In the embodiment, the electric cell assembly includes at least two electric cells 110. When it is required to electrically connect the at least two electric cells 110 to each other, the first sub-body 211 can cover a part of the electric cells 110, the second sub-body 212 can cover another part of the electric cells 110, and the first sub-body 211 and the second sub-body 212 can be connected, so as to form an entirety covering all the electric cells 110 in the electric cell assembly. Meanwhile, the integrated busbar 200 including the insulating support body 210 can be electrically connected with the poles 112 of the electric cells 110, so that the electric cells 110 covered by the first sub-body 211 and the second sub-body 212 can be connected in series.

[0050] The electric cell assembly provided by the embodiment can be configured into the insulating support body 210 with a relatively long length by the first sub-body 211 and the second sub-body 212 which can be detachably connected with each other, so as to cover a relatively large number of electric cells 110. Meanwhile, the integrated busbar 200 including the insulating support body 210 can be electrically connected with the poles 112 of the electric cells 110, so that all the electric cells 110 in the electric cell assembly can be connected in series, so as to meet the high power requirement.

[0051] Meanwhile, the first sub-body 211 and the second sub-body 212 each can be designed to have a relatively short length, so that the first sub-body 211 and the second sub-body 212 can be prepared in a relatively flexible manner, which can provide a structural basis for reducing the preparation cost of the integrated busbar 200, so as to help reduce the preparation cost of the electric cell assembly and be suitable for mass production.

[0052] Figure 4 An enlarged schematic view of D part in Figure 3 is shown, Figure 5 is a partial exploded schematic view of the electric cell assembly, like Figure 4 and Figure 5 In some embodiments, the first sub-body 211 and the second sub-body 212 are connected by the connecting assembly 214; the first sub-body 211 has a first connecting surface 2111, the second sub-body 212 has a second connecting surface 2121, and the connecting assembly 214 is located at the first connecting surface 2111 and / or the second connecting surface 2121.

[0053] For example, the connecting assembly 214 can include a plug and a matching socket, or a card column and a matching card hole, or a plug-in column 2141 and a matching plug-in sleeve 2142, etc.

[0054] For example, when the first sub-body 211 and the second sub-body 212 are connected, the first connecting surface 2111 and the second connecting surface 2121 overlap.

[0055] For example, the first sub-body 211 is provided with a groove near the end close to the second sub-body 212, and the groove wall near the second sub-body 212 is removed to form a side opening, and the first connecting surface 2111 is the groove bottom of the groove. The second sub-body 212 is provided with a horizontally protruding platform near the end close to the first sub-body 211, and the second connecting surface 2121 is the upper surface of the platform. The platform can be inserted into the groove through the side opening.

[0056] When the connecting assembly 214 is a socket, the socket can be provided only in one of the first connecting surface 2111 and the second connecting surface 2121, and the shape of the socket matches the shape of the other. When the other is inserted into the socket, the first sub-body 211 and the second sub-body 212 are connected through the connecting assembly 214.

[0057] When the connecting assembly 214 includes a card column and a card hole, one of the first connecting surface 2111 and the second connecting surface 2121 is provided with a card column, and the other is provided with a card hole. When the card column is inserted into the card hole, the first sub-body 211 and the second sub-body 212 are connected through the connecting assembly 214.

[0058] In the embodiment, the first connecting surface 2111 is provided on the first sub-body 211, the second connecting surface 2121 is provided on the second sub-body 212, and the connecting assembly 214 is provided on the first connecting surface 2111 and / or the second connecting surface 2121. This can make the connecting assembly 214 independent of other structures on the first sub-body 211 and the second sub-body 212, thereby providing an operation space for disassembling the connecting assembly 214, and avoiding interference between the connecting assembly 214 and other structures on the first sub-body 211 and the second sub-body 212 during disassembly.

[0059] For example, Figure 4 and Figure 5 In some embodiments, the connecting assembly 214 includes a plug-in column 2141 formed on the first connecting surface 2111, and a plug-in sleeve 2142 formed on the second connecting surface 2121, and the plug-in column 2141 is adapted to be arranged in the plug-in sleeve 2142.

[0060] For example, the radial cross-sectional shape of the plug-in column 2141 matches the radial cross-sectional shape of the inner hole of the plug-in sleeve 2142.

[0061] After the plug-in pin 2141 is inserted into the plug-in sleeve 2142 through the end opening (such as the bottom opening), the two are radially restrained to prevent the first sub-body 211 and the second sub-body 212 from separating from each other in the horizontal direction. At the same time, the connection between the plug-in pin 2141 and the plug-in sleeve 2142 is relatively convenient, which helps to reduce the assembly difficulty between the first sub-body 211 and the second sub-body 212 and facilitates mass production.

[0062] In addition, the plug-in post 2141 and plug-in sleeve 2142 can be formed by either injection molding or vacuum forming, making the choice of manufacturing process for the insulating support body 210 more flexible.

[0063] like Figure 5 In some embodiments, the cell assembly includes at least two cells 110 within the cell stack 100 along a stacking direction (e.g., ...). Figure 5 At least two battery cell stacks 100 are arranged at intervals in the X direction, and are electrically connected by an integrated busbar 200; a first sub-body 211 and a second sub-body 212 each correspond to a battery cell stack 100, and a connecting component 214 is located between two adjacent battery cell stacks 100.

[0064] For example, such as Figure 1 Multiple strips 240 can be disposed above the first sub-body 211, with the multiple strips 240 extending along the width direction of the cell 110 (e.g., ...). Figure 1 The two columns (in the Y direction) are formed so that multiple cells 110 in the cell stack 100 corresponding to the first sub-body 211 are connected in series. Similarly, multiple cells 110 in the cell stack 100 corresponding to the second sub-body 212 are also connected in series through two columns of plates 240.

[0065] For example, a structural plate for improving connection strength or a water-cooling plate for reducing the temperature of the battery cell 110 can be provided between the two battery cell stacks 100.

[0066] In this embodiment, the two cell stacks 100 are spaced apart. The gap between the two cell stacks 100 can provide more space for the connection component 214, providing a spatial basis for ensuring the structural strength of the connection component 214, thereby helping to improve the connection reliability between the first sub-body 211 and the second sub-body 212.

[0067] Figure 6 A front view schematic diagram of the battery cell assembly is shown, such as... Figure 6 In some embodiments, a middle plate 600 connects two adjacent cell stacks 100, and the first end 111 is the top end of the cell 110, along the height direction of the cell 110 (e.g., ...). Figure 6The top of the middle plate 600 is below the first end 111 to form the avoidance space 500 between the two adjacent cell stacks 100. The connecting assembly 214 is arranged corresponding to the middle plate 600, and at least part of the connecting assembly 214 is located in the avoidance space 500.

[0068] For example, the cell assembly includes two cell stacks 100, and each cell stack 100 is connected with an end plate 400 away from the middle plate 600. The two end plates 400, the two cell stacks 100 and the middle plate 600 can be connected by a binding belt.

[0069] In order to improve the connection strength between the two cell stacks 100, the middle plate 600 is arranged between the two cell stacks 100, and the two cell stacks 100 are connected with the middle plate 600 respectively.

[0070] In combination with the foregoing, in order to avoid the interference between the connecting assembly 214 and other devices, the height of the connecting assembly 214 can be set to be relatively low. However, this may result in the interference between the connecting assembly 214 and the first end 111. In order to avoid the above problems, in the embodiment, the top of the middle plate 600 between the two cell stacks 100 is set to be lower than the first end 111. Then, the top of the middle plate 600 and the end walls of the cell stacks 100 on both sides can form a U-shaped avoidance space 500. Even if the height of the connecting assembly 214 is set to be relatively low, as long as the position of the connecting assembly 214 corresponds to the position of the middle plate 600, the connecting assembly 214 can be accommodated in the avoidance space 500, thereby avoiding the interference between the connecting assembly 214 and the first end 111.

[0071] In some embodiments, as Figure 1 and Figure 3 The integrated busbar 200 includes the bar piece 240, and the bar piece 240 is electrically connected with the pole 112 of each cell 110 respectively. Figure 7 An enlarged schematic view of part A in FIG. 8 is shown. Figure 1 As Figure 5 and Figure 7 The surface of the insulating support body 210 away from the first end 111 is provided with a mounting groove 215, and the groove bottom of the mounting groove 215 is provided with at least two connecting through holes 213. The bar piece 240 is arranged in the mounting groove 215 and is electrically connected with the pole 112 through the connecting through holes 213. At least one side groove wall of the mounting groove 215 forms a protruding limiting protrusion 216, and the limiting protrusion 216 abuts against the surface of the bar piece 240 away from the pole 112.

[0072] Exemplarily, the bar piece 240 can include two spaced apart outer connecting portions 241, the outer connecting portions 241 being electrically connected with the corresponding pole column 112, and a cross connecting portion 242 being electrically connected between the two adjacent outer connecting portions 241.

[0073] Exemplarily, the outer connecting portion 241 can be electrically connected with the pole column 112 by welding, riveting, bonding, inserting, clamping or fastener connection.

[0074] Exemplarily, the outer connecting portion 241 and the cross connecting portion 242 can be electrically connected by welding, bonding, inserting, clamping, fastener connection or one-piece forming.

[0075] Exemplarily, the outer connecting portion 241 can be a plate structure.

[0076] Exemplarily, the cross connecting portion 242 can be a protruding structure at least partially higher than the outer connecting portion 241.

[0077] Exemplarily, the limiting protrusions 216 are arranged in pairs and are respectively arranged on the opposite two groove walls of the mounting groove 215.

[0078] Exemplarily, the limiting protrusions 216 abut against the outer connecting portion 241, and each outer connecting portion 241 is provided with at least one limiting protrusion 216.

[0079] Exemplarily, the limiting protrusions 216 can be connected with the groove walls of the mounting groove 215 by bonding, inserting, clamping or one-piece forming.

[0080] Exemplarily, the outer connecting portion 241 abuts against the groove bottom of the mounting groove 215.

[0081] Exemplarily, the shape of the mounting groove 215 matches the shape of the outer contour of the bar piece 240, so as to better limit the bar piece 240 in the horizontal direction.

[0082] The limiting protrusions 216 abut against the surface of the bar piece 240 away from the pole column 112, and can exert a downward extrusion force on the bar piece 240, thereby limiting the bar piece 240 in the thickness direction. The extrusion force provided by the limiting protrusions 216 can ensure that the bar piece 240 can be in contact with the pole column 112 below, so that the adjacent battery cells 110 can be reliably electrically connected.

[0083] The mounting groove 215 and the limiting protrusions 216 can limit the bar piece 240, so as to ensure that the bar piece 240 and the pole column 112 form a reliable electrical connection. On the one hand, the assembly difficulty of the battery cell assembly is reduced, and on the other hand, the outer surface of the bar piece 240 can have a larger free space, which can be used for connection with external devices.

[0084] As Figure 3 ,Figure 4 And Figure 5 In some embodiments, the battery cell assembly includes a first battery cell stack 100a corresponding to the first sub-body 211, and a second battery cell stack 100b corresponding to the second sub-body 212; the terminal plate 240 includes a cross terminal plate 230 arranged above the connecting assembly 214, the first battery cell stack 100a and the second battery cell stack 100b are electrically connected through the cross terminal plate 230; the first connecting surface 2111 and the second connecting surface 2121 are located below the cross terminal plate 230.

[0085] For example, the cross portion 242 of the cross terminal plate 230 is arranged above the connecting assembly 214.

[0086] For example, the first connecting surface 2111 and the second connecting surface 2121 are located below the circumscribed portion 241 of the cross terminal plate 230.

[0087] In this embodiment, the first battery cell stack 100a below the first sub-body 211 and the second battery cell stack 100b below the second sub-body 212 are connected in series through the cross terminal plate 230.

[0088] The connecting assembly 214 between the first sub-body 211 and the second sub-body 212 can have a protruding portion. In order to avoid the protruding portion of the connecting assembly 214 interfering with the cross terminal plate 230, the cross terminal plate 230 can be arranged above the connecting assembly 214, so that the cross terminal plate 230 can pass over the connecting assembly 214 from above to form an avoidance position. Thus, the connection between the cross terminal plate 230 and the pole 112 is reliable, and the first battery cell stack 100a and the second battery cell stack 100b can be stably connected in series.

[0089] At the same time, the first connecting surface 2111 and the second connecting surface 2121 can also be arranged below the cross terminal plate 230. Correspondingly, the height of the connecting assembly 214 arranged on the first connecting surface 2111 and / or the second connecting surface 2121 is further reduced, further preventing the protruding portion of the connecting assembly 214 from interfering with the cross terminal plate 230. In addition, when the height of the connecting assembly 214 is low, the overall height of the battery cell assembly can be reduced, which helps to improve the energy density of the battery pack using the battery cell assembly of the present embodiment.

[0090] For example, Figure 7 In some embodiments, the surface of the limiting protrusion 216 away from the groove bottom of the mounting groove 215 is inclined to the groove bottom of the mounting groove 215.

[0091] When the tab 240 is installed into the installation groove 215, the inclined surface of the limiting protrusion 216 can guide the tab 240. After the edge of the tab 240 moves along the inclined surface, the tab 240 can be installed at the preset position in the installation groove 215. Of course, the tab 240 can also be directly injection molded and fixed on the insulating support body 210.

[0092] Figure 8 A cross-sectional view of a B-B section is shown as follows: Figure 2 Figure 7 Figure 8 In some embodiments, the insulating support body 210 is provided with a monitoring through hole 217 penetrating through the thickness direction thereof, the sensor 700 is adapted to pass through the monitoring through hole 217 and be connected with the battery cell 110, and the integrated busbar 200 further comprises a protective cover 220 detachably connected with the insulating support body 210, the protective cover 220 covering the monitoring through hole 217 and the sensor 700.

[0093] For example, the sensor 700 can be an NTC sensor, i.e., a thermal sensor, for monitoring the temperature of the battery cell 110.

[0094] For example, the sensor 700 can be adhesively connected with the battery cell 110 in a heat-conducting manner.

[0095] For example, the protective cover 220 is clamped and fixed with the insulating support body 210.

[0096] For example, the battery cell assembly can further comprise a circuit board (for example, a flexible circuit board), and the tab 240 and the sensor 700 are respectively connected with the circuit board.

[0097] Through the sensor 700 connected with the battery cell 110, the running state of the battery cell 110 can be monitored. However, if the sensor 700 collides with external structural parts during transportation or use, the precision of the sensor 700 can be easily reduced or even damaged. In order to protect the sensor 700, the protective cover 220 capable of covering the monitoring through hole 217 and the sensor 700 is arranged in the embodiment. After the sensor 700 is connected with the battery cell 110, the protective cover 220 can be connected with the insulating support body 210, so as to provide covering protection for the sensor 700, block foreign matters from approaching the sensor 700 from the outside, and avoid damage to the sensor 700. Since the protective cover 220 is detachably connected with the insulating support body 210, the protective cover 220 can be repeatedly disassembled and assembled, so as to facilitate observation of the adhesion condition of the sensor 700 after gluing.

[0098] In some embodiments, the first sub-body 211 and / or the second sub-body 212 is an injection molded structure.

[0099] ​​The first sub-body 211 and the second sub-body 212 are formed by the plastic uptake process, which has the advantages of low manufacturing cost, high precision, and short molding time. Meanwhile, as described above, since the insulating support body 210 is formed by splicing the first sub-body 211 and the second sub-body 212, the lengths of the first sub-body 211 and the second sub-body 212 can be designed to be small, so as to solve the problem that it is difficult to manufacture large-size structural parts by the plastic uptake process.

[0100] Based on the same inventive concept, in combination with the descriptions of the battery cell assemblies in the above various embodiments, the present embodiment provides a battery pack, which has the corresponding technical effects of the battery cell assemblies in the above various embodiments, and details are not described herein.

[0101] A battery pack comprising the battery cell assembly as described in the above various embodiments.

[0102] Based on the same inventive concept, in combination with the descriptions of the battery cell assemblies and the battery pack in the above various embodiments, the present embodiment provides a battery pack, which has the corresponding technical effects of the battery cell assemblies and the battery pack in the above various embodiments, and details are not described herein.

[0103] A battery pack comprising the battery cell assembly as described in the above various embodiments.

[0104] It should be noted that the above describes some embodiments of the present application. Other embodiments are within the scope of the appended claims. In some cases, the acts or steps in a claim may be performed in an order different than the order described in the embodiments above and still accomplish the desired result. In addition, the process depicted in the figures does not necessarily require the particular order shown, or sequential order to achieve the desired results. In some implementations, multitasking and parallel processing can be advantageous.

[0105] Each of the embodiments in the present application is described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the embodiments can be mutually referred to.

[0106] The description in the present application is given for the purpose of illustration and description, and is not exhaustive or limiting to the present application. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiments are chosen and described in order to better illustrate the principles and practical application of the present application, and to enable those of ordinary skill in the art to understand the present application in order to design various embodiments with various modifications for specific use.

[0107] Those skilled in the art should understand: the discussion of the above any embodiment is only exemplary, and is not intended to imply that the scope of the application is limited to these examples; in the idea of the present application, the above embodiments or the technical features in different embodiments can also be combined, the steps can be implemented in any order, and there are many other changes of different aspects of the embodiments of the present application as described above, which are not provided in details for the sake of brevity.

[0108] Although the present application has been described in conjunction with the specific embodiments thereof, it is to be understood that many alternatives, modifications and variations will be apparent to those skilled in the art in light of the foregoing description.

[0109] Embodiments of the present application are intended to cover all such alternatives, modifications, and variations as falling within the scope of the present application. Accordingly, any omission, modification, equivalent replacement, improvement, etc. made in the spirit and principle of the embodiments of the present application should be included in the protection scope of the present application.

Claims

1. A battery cell assembly, characterized in that, include: At least two battery cells, each of which has a terminal post at its first end; An integrated busbar is electrically connected to the terminal of the battery cell. The integrated busbar includes an insulating support body near the first end. The insulating support body includes a first sub-body and a second sub-body that are detachably connected to each other.

2. The battery cell assembly according to claim 1, characterized in that, The first sub-body and the second sub-body are connected by a connecting component; The first sub-body has a first connecting surface, the second sub-body has a second connecting surface, and the connecting component is located on the first connecting surface and / or the second connecting surface.

3. The cell assembly according to claim 2, characterized in that, The connection assembly includes a plug post formed on the first connection surface and a plug sleeve formed on the second connection surface, the plug post being adapted to pass through the plug sleeve.

4. The cell assembly according to claim 2, characterized in that, The cell assembly includes at least two cell stacks spaced apart along the stacking direction of the cells within the cell stack, and the at least two cell stacks are electrically connected through the integrated busbar. The first sub-body and the second sub-body each correspond to one of the battery cell stacks, and the connecting component is located between two adjacent battery cell stacks.

5. The cell assembly according to claim 4, characterized in that, A middle plate is connected between two adjacent battery cell stacks. The first end is the top of the battery cell. Along the height direction of the battery cell, the top of the middle plate is located below the first end to form a clearance space between two adjacent battery cell stacks. The connecting component is correspondingly arranged with the middle plate, and at least part of the connecting component is located within the clearance space.

6. The cell assembly according to claim 2, characterized in that, The integrated busbar includes a switch plate, which is electrically connected to the respective pole of each of the two battery cells; the surface of the insulating support body away from the first end is provided with a mounting groove, and the bottom of the mounting groove is provided with at least two connecting through holes at intervals; the switch plate is disposed in the mounting groove and is electrically connected to the pole through the connecting through holes; at least one side wall of the mounting groove is formed with a protruding limiting protrusion, which abuts against the surface of the switch plate away from the pole.

7. The cell assembly according to claim 6, characterized in that, The battery cell assembly includes a first battery cell stack corresponding to the first sub-body and a second battery cell stack corresponding to the second sub-body; the connector includes a bridging connector mounted above the connection assembly, and the first battery cell stack and the second battery cell stack are electrically connected through the bridging connector. The first connecting surface and the second connecting surface are located below the bridging plate.

8. The cell assembly according to claim 6, characterized in that, The surface of the limiting protrusion that is away from the bottom of the mounting groove is inclined toward the bottom of the mounting groove.

9. The cell assembly according to claim 1, characterized in that, The insulating support body has a monitoring through hole extending through its thickness direction. The sensor is adapted to pass through the monitoring through hole and connect to the battery cell. The integrated busbar also includes a protective cover detachably connected to the insulating support body, which covers the monitoring through hole and the sensor.

10. The cell assembly according to claim 1, characterized in that, The first sub-body and / or the second sub-body are thermoforming structures.

11. A battery pack, characterized in that, Includes the cell assembly as described in any one of claims 1 to 10.

12. A battery pack, characterized in that, Includes the cell assembly as described in any one of claims 1 to 10.

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