Cell unit, battery and vehicle

Abstract

The present invention discloses a cell unit (1), a battery (3), and a vehicle, and the vehicle or the battery (3) includes a cell unit (1). The cell unit (1) includes a cell module (10), and the cell modules (10) are multiple and connected in series. The cell module (10) includes at least one cell group (11) and a holder (12) provided at both ends of the at least one cell group (11). Each cell group (11) includes multiple cells (111) stacked along a first direction, and the multiple cells (111) are connected in parallel. The first direction is the thickness direction of the cells (111). The holder (12) includes a holder body (121) and a conductive sheet (122) attached to the holder body (121). At least one tab extension hole (1211) is provided in the holder body (121), and the tabs (112) of the cells (111) pass through the tab extension hole (1211) and are connected to the conductive sheet (122). The cell module (10) further includes a support fixing member (15), and the support fixing member (15) is provided between the holders (12) at both ends of the at least one cell group (11).

Description

[Technical Field]

[0001] This application claims priority to a Chinese patent application bearing application number 202122922163.3 and entitled "Cell Unit, Battery and Vehicle," filed with the State Intellectual Property Office of the People's Republic of China on November 24, 2021, the entire contents of which are incorporated herein by reference.

[0002] The present invention relates to the technical field of batteries, and more particularly to a cell unit, a battery, and a vehicle. [Background technology]

[0003] Conventional pouch batteries are assembled by stacking and fastening multiple cell units in a single dimension. This single-dimensional stacking and connection method is disadvantageous in improving the overall battery capacity. Furthermore, the cells of conventional pouch batteries are connected to each other by being crimped with a connecting sheet and then fastened with bolts, which makes assembly complicated and inefficient. Furthermore, after stacking the cells, they must be restrained with steel strips, which requires many parts and is costly. Summary of the Invention [Problem to be solved by the invention]

[0004] The subject matter of the present application aims to solve at least one of the technical problems in the prior art. [Means for solving the problem]

[0005] For this reason, the cell unit according to one embodiment of the present application is a plurality of cell modules connected in series; The cell module includes at least one cell group and holders provided on both ends of the at least one cell group, Each of the cell groups includes a plurality of cells stacked along a first direction, the plurality of cells are connected in parallel, and the first direction is a thickness direction of the cells; The holder includes a holder body and a conductive sheet attached to the holder body, the holder body is provided with at least one tab extension hole, and the tab of the cell passes through the tab extension hole and is connected to the conductive sheet, the cell module further includes a support fixing member, and the support fixing member is provided between the holders at both ends of the at least one cell group.

[0006] In some embodiments, the conductive sheet includes a first conductive sheet and a second conductive sheet, the first conductive sheet and the second conductive sheet are connected to each other and disposed at a certain angle, a tab escape hole is provided between the first conductive sheet and the second conductive sheet, and the tab of the cell is connected to the first conductive sheet by passing through the tab extension hole and the tab escape hole in that order.

[0007] In some embodiments, the holder body has a first side, a second side, and a third side, the first side being a side close to the cell, the second side being a side opposite to the first side and away from the cell, the third side being a side parallel to the direction in which the tab of the cell is pulled out and perpendicular to the first direction, the first conductive sheet being provided on the second side, and the second conductive sheet being provided on the third side.

[0008] In some embodiments, the holder body is provided with a support stopper groove, and the support fixing member is inserted into the support stopper groove.

[0009] In some embodiments, the support stopper groove is a V-shaped groove, and the support fixing member is an aluminum plate.

[0010] In some embodiments, the cell unit further includes an intermediate connection sheet, which is respectively connected to the second conductive sheet on the holder of the adjacent cell module, and the adjacent cell modules are connected in series via the intermediate connection sheet.

[0011] In some embodiments, the support fixing member and the cell group are stacked and arranged along the first direction, an adhesive layer is provided on the support fixing member, and the support fixing member and the cell group are adhered by the adhesive layer.

[0012] In some embodiments, the holder body and the conductive sheet are connected by an interlocking structure.

[0013] In some embodiments, the at least one cell group is a single cell group, the holders are provided at both ends of the single cell group, and each holder is provided with one of the conductive sheets; The conductive sheet of the first polarity of the cell module and the conductive sheet of the second polarity of the adjacent cell module are connected via the intermediate connection sheet.

[0014] In some embodiments, the at least one cell group is a plurality of cell groups, the plurality of cell groups are arranged along the first direction, and the holders are provided at both ends of the plurality of cell groups; a plurality of the conductive sheets are provided on each of the holders, the number of the conductive sheets is the same as the number of the plurality of cell groups, and the polarities of the adjacent conductive sheets arranged along the first direction are opposite; The cell unit further includes an intermediate connection sheet, and the conductive sheet of the cell module and the conductive sheet of the adjacent cell module are connected via the intermediate connection sheet; The cell unit further includes a rear end connection sheet, and the rear end connection sheet is attached to the holder of the cell module, which is an end of the cell unit.

[0015] In some embodiments, the rear end connecting sheet is integrally formed with the plurality of conductive sheets in the holder.

[0016] In some embodiments, the holder body is provided with insulating partitions, and the insulating partitions are provided between the conductive sheets connected to different cell groups.

[0017] In some embodiments, the tab is bent after passing through the tab extension hole to form a bent portion, and the bent portion is welded to the conductive sheet.

[0018] In some embodiments, the holder body is provided with an elastic locking button, the conductive sheet is provided with a locking hole corresponding to the elastic locking button, and the conductive sheet is attached to the holder body by the locking hole and the elastic locking button.

[0019] The cell unit according to the embodiment of the present application is formed by connecting cell modules in series. The cell module is composed of at least one cell group and is assembled and fixed by a holder. The series-connected cell modules can be provided according to actual needs. After the cell groups are assembled into a cell module, a standardized cell module is formed. According to actual needs, the cell groups can be further connected in series to form cell units of various sizes, and then batteries of various sizes can be formed. The cell unit according to the embodiment of the present application is easy to install, has high assembly efficiency, and has a very high space utilization rate within the battery housing, reaching 98%. Furthermore, the cell modules constituting the cell unit are highly reproducible, making it easy to form battery packs with various arrangements and standards.

[0020] Furthermore, a battery according to an embodiment of the present application is a battery including a housing, further including a cell unit according to any of the embodiments of the present application, wherein the cell unit is accommodated in the housing.

[0021] Furthermore, a vehicle according to an embodiment of the present application is characterized by including a cell unit according to the embodiment of the present application and a chassis structure that houses the cell unit. [Brief explanation of the drawings]

[0022] In order to more clearly describe the technical means in the embodiments of the present application, the drawings necessary for the embodiments will be briefly described below. Obviously, the drawings in the following description are only some embodiments of the present application, and those skilled in the art can obtain other drawings based on these drawings without any creative efforts.

[0023] [Figure 1] 1 is a schematic diagram of a battery according to an embodiment of the present invention; [Figure 2] 1 is a schematic diagram illustrating the configuration of a cell unit according to an embodiment of the present application. [Figure 3] FIG. 3 is a partial enlarged view of part A in FIG. 2. [Figure 4] 1 is a schematic configuration diagram of a cell module according to an embodiment of the present application. [Figure 5] FIG. 2 is an exploded view of a cell module according to an embodiment of the present application. [Figure 6] FIG. 1 is a schematic diagram illustrating a configuration in which adjacent cell modules are not connected to one another according to an embodiment of the present application. [Figure 7] 1 is a schematic diagram illustrating a holder according to an embodiment of the present invention; [Figure 8] FIG. 2 is an exploded view of a holder according to an embodiment of the present application. [Figure 9] FIG. 5 is a cross-sectional view of the cell module of FIG. 4 taken along line AA according to one embodiment of the present invention. [Figure 10] FIG. 2 is another schematic diagram of a cell unit according to an embodiment of the present application. [Figure 11] FIG. 2 is an exploded view of a cell module holder, which is an end portion of a cell unit according to one embodiment of the present application. DETAILED DESCRIPTION OF THE INVENTION

[0024] Features and exemplary embodiments of each aspect of the present application will be described in detail below. In the following detailed description, many specific details are presented to provide a thorough understanding of the present application. However, as will be apparent to those skilled in the art, the following description of the embodiments is merely for illustrative purposes to facilitate understanding of the present application. In the drawings and the following description, at least some known structures and techniques are not shown to avoid unnecessary interference with the present application. The size of related structures may be exaggerated to clearly show related components. Furthermore, the features, structures, or characteristics described below may be combined in any suitable manner in one or more embodiments.

[0025] As shown in FIG. 2, the cell unit 1 of the present application includes a plurality of cell modules 10 connected in series, and the cell module 10 includes at least one cell group 11 and holders 12 provided at two ends of the cell group 11. The cell group 11 includes a plurality of cells 111 stacked along a first direction, and the cells 111 have tabs 112. The first direction is the thickness direction of the cells 111. The plurality of cells 111 in the cell group 11 are connected in parallel. The end of the cell group 11 is an end of the cell group 11 along a second direction, and the second direction is the direction in which the tabs 112 of the cells 111 are pulled out. As shown in FIGS. 7 and 8, the holder 12 includes a holder main body 121 and a conductive sheet 122 attached to the holder main body 121. The multiple cells 111 of the cell group 11 are connected in parallel and connected to the conductive sheet 122 on the holder 12, and the conductive sheets 122 on the holders 12 of two adjacent cell modules 10 are connected, thereby connecting the two adjacent cell modules 10 in series.

[0026] 6 and 8 , the holder body 121 is formed with tab extension holes 1211, which correspond to the tabs 112 of the cells 111, and the number of the tab extension holes 1211 is the same as the number of the cells 111 in the cell group 11. The tabs 112 of the cells 111 in the cell group 11 pass through the corresponding tab extension holes 1211 to be connected to the conductive sheet 122. The connection between the tabs 112 and the conductive sheet 122 may be by welding or other connection methods. To ensure the reliability of the connection between the tabs 112 and the conductive sheet 122, the tabs 112 are bent to form bent portions after passing through the corresponding tab extension holes 1211, and the bent portions are welded to the conductive sheet 122. In another embodiment, the number of tab extension holes 1211 may be the same as the number of cell groups 11, and the tabs of multiple cells 111 in the cell group 11 may first be welded together to form a merged tab, realizing a parallel connection, and then passing through the tab extension holes 1211 to connect to the conductive sheet 122.

[0027] As shown in FIGS. 4 and 5 , the cell module 10 further includes a support fixing member 15. The support fixing member 15 is disposed between the holders 12 at both ends of the cell group 11 to support and fix the holders 12. As shown in FIG. 9 , the holders 12 are provided with support stopper grooves 1212, and the support fixing members 15 are inserted into the support stopper grooves 1212 to support and fix the holders 12 at both ends of the cell group 11, thereby forming a cell module 10 with a stable structure between the cell group 11 and the holders 12. Specifically, the support fixing member 15 is an aluminum plate, and the support stopper grooves 1212 are V-shaped grooves. It is understood that other metal plates may also be used as the support fixing member. A V-shaped groove design is more advantageous for fastening and fixing the support fixing member 15. To achieve a higher support effect and heat dissipation effect, the stacking surfaces of the support fixing member 15 and the cells 111 have the same shape and size. The stacking plane of the cells 111 is perpendicular to the first direction. The support and fixing members 15 can also prevent impact and vibration of the tabs 112 of the cells 111 in the pull-out direction. The support and fixing members 15 limit the positions of the holders 12 at both ends of the cell group 11, thereby preventing damage to the tabs 112 due to movement of the holders 12. The support and fixing members 15 are provided with an adhesive layer, and the support and fixing members 15 are adhered to the cell group 11 by the adhesive layer. When the cell module 10 includes multiple cell groups 11, a support and fixing member 15 may be provided between each two adjacent cell groups 11, and an adhesive layer may be provided on both sides of the support and fixing member 15, and the support and fixing member 15 is adhered to the adjacent cell group 11 by the adhesive layer. The adhesive layer is preferably a hot-melt adhesive, but as can be understood, the selection of the material for the adhesive layer is not limited thereto. The adhesive layer may be provided according to actual needs, for example, on only one surface of the support and fixing member 15, on a partial or entire area of ​​one surface of the support and fixing member 15, or on a partial or entire area of ​​both surfaces of the support and fixing member 15. The support and fixing member 15 not only serves to support and fix the battery, but also transfers heat generated during operation of the cell group 11 attached thereto to the external aluminum housing, and the aluminum housing further transfers the heat to a cooling device to maintain the temperature of the battery within an appropriate range.

[0028] As shown in FIG. 8 , the conductive sheet 122 includes a first conductive sheet 1221 and a second conductive sheet 1222 connected to the first conductive sheet 1221. The first conductive sheet 1221 and the second conductive sheet 1222 are connected to each other and disposed at a certain angle. As can be understood, the first conductive sheet 1221 and the second conductive sheet 1222 may be connected by a conventional method such as welding, or may be integrally formed. A tab escape hole 1223 is provided between the first conductive sheet 1221 and the second conductive sheet 1222. The tab escape hole 1223 is provided corresponding to the tab extension hole 1211. The tab escape hole 1223 is provided at the connection point between the first conductive sheet 1221 and the second conductive sheet 1222. When the first conductive sheet 1221 and the second conductive sheet 1222 are integrally formed, the tab escape hole 1223 is provided at the folded portion of the first conductive sheet 1221 and the second conductive sheet 1222. Preferably, the first conductive sheet 1221 is provided perpendicular to the second conductive sheet 1222. In other embodiments, the first conductive sheet 1221 and the second conductive sheet 1222 may be provided at a non-perpendicular angle. The tab 112 of the cell 111 passes through the tab extension hole 1211 and the tab escape hole 1223 in this order, and is then connected to the first conductive sheet 1221.

[0029] 5 and 7 , the holder body 121 has a first side surface 1216, a second side surface 1217, and a third side surface 1218. The first side surface 1216 of the holder body 121 is a surface close to the cell 111. The second side surface 1217 of the holder body 121 is a surface opposite to the first side surface 1216 and away from the cell 111. The third side surface 1218 of the holder body 121 is a surface parallel to the direction in which the cell tab 112 is pulled out and perpendicular to the first direction. A first conductive sheet 1221 is provided on the second side surface 1217 of the holder body 121, and a second conductive sheet 1222 is provided on the third side surface 1218 of the holder body 121. A support stopper groove 1212 is provided in the first side surface 1216 of the holder body 121. The tabs 112 of the cells 111 of the cell group 11 are welded to the first conductive sheet 1221 after passing through the tab extension holes 1211 and the tab relief holes 1223 .

[0030] 2 and 3, the cell unit 1 further includes an intermediate connection sheet 13, and two adjacent cell modules 10 are connected via the intermediate connection sheet 13. The intermediate connection sheet 13 is connected to the second conductive sheets 1222 of the two adjacent cell modules 10, thereby connecting the cell modules 10 in series.

[0031] 8, the conductive sheet 122 and the holder body 121 are connected by an engagement mechanism. Specifically, a resilient locking button 1213 is provided on the holder body 121, and a locking hole 1224 corresponding to the resilient locking button 1213 is provided on the conductive sheet 122. The conductive sheet 122 is attached to the holder body 121 by firmly pressing the locking hole 1224 of the conductive sheet 122 to engage with the outside of the resilient locking button 1213. Specifically, the locking hole 1224 is provided on the second conductive sheet 1222. To further ensure a stable attachment effect between the conductive sheet 122 and the holder body 121, the first conductive sheet 1221 is further provided with an engagement recess 1225, and the holder body 121 is provided with an engagement convex key 1214 corresponding to the engagement recess 1225. The engaging recesses 1225 of the first conductive sheet 1221 engage with and fit into the engaging convex keys 1214 of the holder body 121, further ensuring the stability of the connection between the conductive sheet 122 and the holder body 121.

[0032] The cells 111 in the cell group 11 are bonded together by an adhesive layer, increasing the rigidity and strength of the entire cell group 11. Tabs of the cells 111 with the same polarity in the cell group 11 are pulled out in the same direction and then connected to a conductive sheet 122 to form a parallel connection. The cells 111 have a first polarity and a second polarity. The first polarity is a negative electrode and the second polarity is a positive electrode, or the first polarity is a positive electrode and the second polarity is a negative electrode. Therefore, when the tabs 112 of the cells 111 are pulled out and then connected to the conductive sheet 122, the conductive sheet 122 also has the same polarity as the tabs 112 of the cells 111, i.e., the first polarity or the second polarity. Therefore, the cell group 11 and the cell module 10 composed of the cells 111 also have a first polarity and a second polarity. Two adjacent cell modules 10 are connected in series by connecting the first polarity conductive sheet 122 of one cell module 10 to the second polarity conductive sheet 122 of another adjacent cell module 10. The first polarity conductive sheet 122 of one cell module 10 and the second polarity conductive sheet 122 of the other adjacent cell module 10 are connected via an intermediate connection sheet 13.

[0033] As shown in FIGS. 4 and 5 , when a cell module 10 includes multiple cell groups 11, the multiple cell groups 11 are arranged along a first direction. The polarities of adjacent cell groups 11 are set to opposite polarities. For example, if a first end of one cell group 11 has a first polarity and a second end has a second polarity, the first end of an adjacent cell group 11 has a second polarity and a second end has a first polarity. When a cell module 10 includes multiple cell groups 11, a support fixing member 15 is provided between each of the cell groups 11. Furthermore, when a cell module 10 includes multiple cell groups 11, both ends of each cell group 11 are connected to a conductive sheet 122. To avoid short circuits due to the opposite polarities of adjacent cell groups 11, an insulating partition 1215 is further provided in the holder body 121, and the insulating partition 1215 is provided between the conductive sheets 122 connected to different cell groups 11.

[0034] In one embodiment of the present application, the cell unit 1 includes a plurality of cell modules 10 connected in series, and the cell module 10 includes one cell group 11 and holders 12 provided on both ends of the cell group 11, and one conductive sheet 122 is provided on the holder 12. The tabs 112 of the same polarity of the plurality of cells 111 in the cell group 11 pass through tab extension holes 1211 of the holder 12 and tab relief holes 1223 of the conductive sheet 122, and are then bent and connected to the conductive sheet 122. The intermediate connection sheet 13 is connected to the conductive sheet 122 of one polarity of the cell group 11, and is also connected to the conductive sheet 122 of the other polarity of an adjacent cell group 11. Adjacent cell modules 10 are connected via the intermediate connection sheet 13 to achieve a series connection.

[0035] In one embodiment of the present application, the cell unit 1 includes a plurality of cell modules 10 connected in series, and the cell module 10 includes a plurality of cell groups 11 and holders 12 provided at both ends of the cell groups 11. The plurality of cell groups 11 are arranged in an array along a first direction. A plurality of conductive sheets 122 are provided on the holder 12, the number of conductive sheets 122 being the same as the number of cell groups 11, and the polarities of adjacent conductive sheets 122 arranged along the first direction are opposite. The conductive sheet 122 of one cell module 10 is connected to the conductive sheet 122 of another adjacent cell module 10 via an intermediate connection sheet 13. The cell unit 1 further includes a rear end connection sheet 14, which is attached to the holder 12 of the cell module 10 at the end of the cell unit 1. The rear end connection sheet 14 connects the different polarities of the cell modules 10 at the end of the cell unit 1, thereby realizing a series connection of the entire cell unit. The rear end connection sheet 14 may be a horizontal connection sheet or a linear connection sheet. The rear end connection sheet 14 is connected to multiple conductive sheets on the holder 12. Furthermore, as shown in FIGS. 10 and 11, the rear end connection sheet 14 may be integrally formed with multiple conductive sheets 122 on the holder 12. As shown in FIG. 11, there are two rear end connection sheets 14. Specifically, the number of rear end connection sheets 14 is not limited to this.

[0036] As shown in FIG. 4, specifically, the cell module 10 includes two cell groups 11 and holders 12 provided at both ends of the cell groups 11. The number of cell groups 11 is not limited to this and may be increased as necessary. As shown in FIGS. 4 and 5, an example will be described in which the cell module 10 includes two cell groups 11. The cell module 10 includes a first cell group 113 and a second cell group 114, each of which includes a plurality of cells 111. The cell module 10 also includes holders 12, i.e., a first holder 123 and a second holder 124, provided at both ends of the first cell group 113 and the second cell group 114. The first holder 123 and the second holder 124 have the same structure and are provided opposite each other. Two conductive sheets 122 are provided on both the first holder 123 and the second holder 124. The tabs 112 of the first polarity of the plurality of cells 111 in the first cell group 113 pass through the tab extension holes 1211 of the first holder 123 and the tab clearance holes 1223 of one of the conductive sheets 122, and are then bent and connected to the conductive sheet 122. The tabs 112 of the second polarity of the plurality of cells 111 in the second cell group 114 pass through the tab extension holes 1211 of the first holder 123 and the tab clearance holes 1223 of the other conductive sheet 122, and are then bent and connected to the other conductive sheet 122. The specific manner in which the tabs 112 of the cells 111 are connected to the conductive sheet 122 after being drawn out may be welding or any other manner that can achieve electrical connection. At the same time, the second polarity tabs 112 of the multiple cells 111 in the first cell group 113 pass through the tab extension holes 1211 of the second holder 124 and the tab escape holes 1223 of one conductive sheet 122, and then are bent and connected to the conductive sheet 122, and the first polarity tabs 112 of the multiple cells 111 in the second cell group 114 pass through the tab extension holes 1211 of the second holder 124 and the tab escape holes 1223 of the other conductive sheet 122, and then are bent and connected to the other conductive sheet 122.As shown in FIGS. 4 and 9 , the first holder 123 and the second holder 124 are disposed opposite each other, and support stopper grooves 1212 are formed in the first holder 123 and the second holder 124. One support fixing member 15 is inserted into the support stopper groove 1212 of the first holder 123 and the support stopper groove 1212 of the second holder 124 to support and fix the cell module 10. The support fixing member 15 is provided at an intermediate position of the cell module 10, i.e., between the first cell group 113 and the second cell group 114. The support fixing member 15 is an aluminum plate, and an adhesive layer is provided on both sides of the aluminum plate. The aluminum plate is adhered to the first cell group 113 and the second cell group 114 by the adhesive layer. The adhesive layer may be provided according to actual needs; for example, it may be provided on only one side of the aluminum plate, on a partial or entire area of ​​one side of the aluminum plate, or on a partial or entire area of ​​both sides of the aluminum plate. After the cell modules 10 are assembled, multiple adjacent cell modules 10 are connected via intermediate connection sheets 13. Ends of adjacent cell modules 10 with opposite polarities are connected via the intermediate connection sheets 13. For example, the intermediate connection sheet 13 is connected to the conductive sheet 122 of a first polarity of one cell module 10 and to the conductive sheet 122 of a second polarity of an adjacent cell module 10, thereby realizing a series connection of the cell groups 11 in the adjacent cell modules 10. When the cell module 10 includes multiple cell groups 11, the cell unit 1 further includes a rear end connection sheet 14, which is provided on the second side surface 1217 of the holder 12 of the cell module 10 at the rear end of the cell unit 1, and is connected to tabs of different polarities of the cell groups 11 of the cell module 10 at the end of the cell unit 1, thereby realizing a series connection of the entire multiple cell modules 10.

[0037] The serially connected cell module 10 of the present application can be provided according to actual needs. After the cell group 11 is assembled into the cell module 10, it becomes a standardized cell module 10, which can be further serially connected as needed to form cell units of various sizes, and further to form batteries of various sizes. The battery unit of the present application is easy to install, has high assembly efficiency, and has a very high space utilization rate within the battery housing, reaching 98%. Furthermore, the cell modules that make up the cell unit are highly reproducible, making it easy to form various arrangements and standard battery packs.

[0038] As shown in Figure 1, a battery 3 according to the present application further includes a cell unit 1 according to any of the above embodiments and a housing 2 that houses the cell unit 1. A vehicle according to the present application further includes a cell unit 1 according to any of the above embodiments and a chassis structure that houses the cell unit 1.

[0039] Any directional terms appearing in the description of this application refer to the directions shown in the drawings and do not limit the specific structure of this application. Furthermore, unless otherwise clearly specified or limited, the terms "attach" and "connect" should be understood in a broad sense, and may refer to, for example, fixedly connected, detachably connected, integrally connected, directly connected, or indirectly connected. Those skilled in the art can understand the specific meanings of the above terms in this application according to specific circumstances.

[0040] The above examples merely illustrate some embodiments of the present application, and although the descriptions are specific and detailed, they should not be understood as limiting the scope of the claims of the present application. Those skilled in the art may make further modifications and improvements without departing from the concept of the present application, all of which fall within the scope of protection of the present application. Therefore, the scope of protection of the present application should be determined based on the scope of the appended claims. [Explanation of symbols]

[0041] 1 cell unit 2. Housing 3 batteries 10 cell module 11 Cell Group 12 Holder 13 Intermediate connection sheet 14 Rear end connection sheet 15 Support fixing member 111 cells 112 tabs 113 Cell Group 1 114 Cell Group 2 121 Holder body 122 Conductive Sheet 123 First Holder 124 Second Holder 1211 Tab extension hole 1212 Support stopper groove 1213 Elastic locking button 1214 Engagement convex key 1215 Insulated partition 1216 1st side 1217 Second side 1218 Third aspect 1221 First conductive sheet 1222 Second conductive sheet 1223 Tab escape hole 1224 Locking hole 1225 Attachment recess

Claims

1. It comprises a plurality of cell modules (10) connected in series, The cell module (10) includes at least one cell group (11) and holders (12) provided at both ends of the at least one cell group (11), each cell group (11) including a plurality of cells (111) stacked along a first direction, the plurality of cells (111) being connected in parallel, and the first direction being a thickness direction of the cells (111), The holder (12) includes a holder body (121) and a conductive sheet (122) attached to the holder body (121), the holder body (121) is provided with at least one tab extension hole (1211), and the tabs (112) of the cells (111) pass through the tab extension hole (1211) and are connected to the conductive sheet (122), the cell module (10) further includes a support fixing member (15), the support fixing member (15) is provided between the holders (12) at both ends of the at least one cell group (11), The conductive sheet (122) includes a first conductive sheet (1221) and a second conductive sheet (1222), and the first conductive sheet (1221) and the second conductive sheet (1222) are connected to each other and are disposed at a certain angle; A tab escape hole (1223) is provided between the first conductive sheet (1221) and the second conductive sheet (1222), A cell unit (1), characterized in that the tab (112) of the cell (111) is connected to the first conductive sheet (1221) by passing through the tab extension hole (1211) and the tab escape hole (1223) in that order.

2. The holder body (121) has a first side surface (1216), a second side surface (1217), and a third side surface (1218), the first side surface (1216) being a surface close to the cell (111), the second side surface (1217) being a surface away from the cell (111) opposite to the first side surface (1216), and the third side surface (1218) being a surface parallel to the pulling-out direction of the tab of the cell (111) and perpendicular to the first direction; The cell unit (1) of claim 1, characterized in that the first conductive sheet (1221) is provided on the second side (1217) and the second conductive sheet (1222) is provided on the third side (1218).

3. The cell unit (1) of claim 1 further comprises an intermediate connection sheet (13) connected to the second conductive sheet (1222) on the holder (12) of adjacent cell modules (10), and the adjacent cell modules (10) are connected in series via the intermediate connection sheet (13).

4. A solar cell system comprising a plurality of cell modules (10) connected in series, The cell module (10) includes at least one cell group (11) and holders (12) provided at both ends of the at least one cell group (11), each cell group (11) including a plurality of cells (111) stacked along a first direction, the plurality of cells (111) being connected in parallel, and the first direction being a thickness direction of the cells (111), The holder (12) includes a holder body (121) and a conductive sheet (122) attached to the holder body (121), the holder body (121) is provided with at least one tab extension hole (1211), and the tabs (112) of the cells (111) pass through the tab extension hole (1211) and are connected to the conductive sheet (122), the cell module (10) further includes a support fixing member (15), the support fixing member (15) is provided between the holders (12) at both ends of the at least one cell group (11), The cell unit (1) is characterized in that the holder body (121) is provided with a support stopper groove (1212), and the support fixing member (15) is inserted into the support stopper groove (1212).

5. 5. The cell unit (1) according to claim 4, wherein the support stopper groove (1212) is a V-shaped groove, and the support fixing member (15) is an aluminum plate.

6. A solar cell system comprising a plurality of cell modules (10) connected in series, The cell module (10) includes at least one cell group (11) and holders (12) provided at both ends of the at least one cell group (11), each cell group (11) including a plurality of cells (111) stacked along a first direction, the plurality of cells (111) being connected in parallel, and the first direction being a thickness direction of the cells (111), The holder (12) includes a holder body (121) and a conductive sheet (122) attached to the holder body (121), the holder body (121) is provided with at least one tab extension hole (1211), and the tabs (112) of the cells (111) pass through the tab extension hole (1211) and are connected to the conductive sheet (122), the cell module (10) further includes a support fixing member (15), the support fixing member (15) is provided between the holders (12) at both ends of the at least one cell group (11), The support and fixing member (15) and the cell group (11) are stacked and arranged along the first direction, The cell unit (1) is characterized in that an adhesive layer is provided on the supporting and fixing member (15), and the supporting and fixing member (15) and the cell group (11) are bonded together by the adhesive layer.

7. The cell unit (1) according to claim 1, characterized in that the holder body (121) and the conductive sheet (122) are connected by an engaging structure.

8. the at least one cell group (11) is one cell group (11), the holders (12) are provided at both ends of the one cell group (11), and each holder (12) is provided with one of the conductive sheets (122); The cell unit (1) of claim 1 further includes an intermediate connection sheet (13), and a first polarity conductive sheet of one cell module (10) and a second polarity conductive sheet (122) of a cell module (10) adjacent to the one cell module (10) are connected via the intermediate connection sheet (13).

9. A solar cell system comprising a plurality of cell modules (10) connected in series, The cell module (10) includes at least one cell group (11) and holders (12) provided at both ends of the at least one cell group (11), each cell group (11) including a plurality of cells (111) stacked along a first direction, the plurality of cells (111) being connected in parallel, and the first direction being a thickness direction of the cells (111), The holder (12) includes a holder body (121) and a conductive sheet (122) attached to the holder body (121), the holder body (121) is provided with at least one tab extension hole (1211), and the tabs (112) of the cells (111) pass through the tab extension hole (1211) and are connected to the conductive sheet (122), the cell module (10) further includes a support fixing member (15), the support fixing member (15) is provided between the holders (12) at both ends of the at least one cell group (11), the at least one cell group (11) is a plurality of cell groups (11), the plurality of cell groups (11) are arranged along the first direction, and the holders (12) are provided at both ends of the plurality of cell groups (11); Each of the holders (12) is provided with a plurality of the conductive sheets (122), the number of the conductive sheets (122) is the same as the number of the plurality of cell groups (11), and the polarities of adjacent conductive sheets (122) arranged along the first direction are opposite; The cell unit (1) further includes an intermediate connection sheet (13), and the conductive sheet (122) of the cell module (10) and the conductive sheet (122) of the adjacent cell module (10) are connected via the intermediate connection sheet (13), The cell unit (1) further includes a rear end connection sheet (14), which is attached to the holder (12) of the cell module (10), which is the end of the cell unit (1).

10. The cell unit (1) according to claim 9, characterized in that the rear end connection sheet (14) is integrally formed with the plurality of conductive sheets (122) in the holder (12).

11. The cell unit (1) according to claim 9, characterized in that the holder body (121) is provided with an insulating partition (1215), and the insulating partition (1215) is provided between conductive sheets (122) connected to different cell groups (11).

12. A cell unit (1) described in any one of claims 1 to 11, characterized in that the tab (112) is bent to form a bent portion after passing through the tab extension hole (1211), and the bent portion is welded and connected to the conductive sheet (122).

13. A solar cell system comprising a plurality of cell modules (10) connected in series, The cell module (10) includes at least one cell group (11) and holders (12) provided at both ends of the at least one cell group (11), each cell group (11) including a plurality of cells (111) stacked along a first direction, the plurality of cells (111) being connected in parallel, and the first direction being a thickness direction of the cells (111), The holder (12) includes a holder body (121) and a conductive sheet (122) attached to the holder body (121), the holder body (121) is provided with at least one tab extension hole (1211), and the tabs (112) of the cells (111) pass through the tab extension hole (1211) and are connected to the conductive sheet (122), the cell module (10) further includes a support fixing member (15), the support fixing member (15) is provided between the holders (12) at both ends of the at least one cell group (11), A cell unit (1) characterized in that the holder main body (121) is provided with an elastic locking button (1213), the conductive sheet (122) is provided with a locking hole (1224) corresponding to the elastic locking button (1213), and the conductive sheet (122) is attached to the holder main body (121) by the locking hole (1224) and the elastic locking button (1213).

14. A battery (3) comprising a housing (2), further comprising a cell unit (1) according to any one of claims 1 to 11, wherein the cell unit (1) is accommodated within the housing (2).

15. A vehicle comprising the cell unit (1) according to any one of claims 1 to 11 and a chassis structure that houses the cell unit (1).

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