Support, battery module, battery pack and electric device

Abstract

The application provides a support, a battery module, a battery pack and a power utilization device, and belongs to the technical field of batteries. The support comprises an end plate and a side plate. The end plate has a plurality of tab hole groups, and the plurality of tab hole groups are sequentially arranged along a first direction. The side plate is located at one side of the end plate, is connected with the edge of the end plate, and extends along the first direction. A plurality of side seal positioning grooves are arranged on the surface of the side plate facing the end plate, and the plurality of side seal positioning grooves are sequentially arranged along the first direction. One end of each side seal positioning groove away from the end plate penetrates through the side plate. The side seal positioning groove corresponds to the tab hole group one by one, each side seal positioning groove and the corresponding tab hole group are configured to cooperate with the same soft package battery cell. Through the above scheme, the side seal positioning groove can cooperate with the side seal edge of the soft package battery cell, so that the cooperation area of the support and the soft package battery cell can be increased, the positioning effect on the soft package battery cell can be improved, and the reliability of the battery pack can be improved.

Description

Technical Field

[0001] This application relates to the field of battery technology, and in particular to a bracket, battery module, battery pack and power device. Background Technology

[0002] The battery pack includes a support frame, multiple battery cells, and multiple busbars mounted on the support frame. The support frame is insulated, such as a plastic support frame or a blister pack frame. The busbars are mounted on the support frame and electrically connect the multiple battery cells to form a single physical module that can provide higher voltage and capacity.

[0003] Based on their packaging form, battery cells can be divided into pouch cells and rigid-case cells. Pouch cells are typically square in structure, consisting of a housing, an electrode assembly housed within the housing, and tabs connected to the electrode assembly. One end of the tab is located inside the housing, while the other end is located outside the housing and passes through a support frame, connecting to a busbar.

[0004] Currently, the positioning effect of the bracket on the soft-pack battery cells is poor, which affects the reliability of the battery pack. Summary of the Invention

[0005] This application provides a bracket, a battery module, a battery pack, and an electrical device to at least partially solve the above-mentioned technical problems.

[0006] To achieve the above objectives, according to a first aspect of this application, a bracket is provided, the bracket including an end plate and a side plate; the end plate has a plurality of tab hole groups arranged sequentially along a first direction; the side plate is located on one side of the end plate, the side plate is connected to the edge of the end plate, and extends along the first direction; wherein, a plurality of side sealing positioning grooves are provided on the surface of the side plate facing the end plate, the plurality of side sealing positioning grooves are arranged sequentially along the first direction, and the end of each side sealing positioning groove away from the end plate penetrates through the side plate; the side sealing positioning grooves correspond one-to-one with the tab hole groups, and the tab hole group corresponding to each side sealing positioning groove is configured to cooperate with the same pouch cell. In this way, by cooperating with the side sealing positioning groove and the side sealing edge of the soft-pack cell, the contact area between the bracket and the soft-pack cell can be increased, improving the positioning effect of the soft-pack cell and thus improving the reliability of the battery pack. At the same time, the side sealing edge of the soft-pack cell can be flattened, eliminating the need for bending and gluing, which simplifies the process, effectively avoids the side sealing edge from hindering the assembly between the soft-pack cell and the bracket, and avoids the increase in weight caused by glue application, thereby increasing the energy density of the battery pack.

[0007] Optionally, the side sealing positioning groove also extends through the side plate along its thickness direction. This allows for direct external observation of the position of the pouch cell relative to the bracket, enabling direct assessment of the alignment between the side seal edge and the side sealing positioning groove during assembly. This facilitates understanding the alignment relationship between the tabs and the tab hole assembly, making the alignment between the pouch cell and the bracket intuitive and clear, thus improving assembly efficiency.

[0008] Optionally, in the first direction, the side sealing positioning groove has two opposing positioning groove sides, and the distance between the two positioning groove sides gradually decreases along the direction closer to the end plate. In this way, the wider end of the side sealing positioning groove can guide the insertion of the side sealing edge, improving the ease of assembly, while the narrower part of the side sealing positioning groove can constrain the side sealing edge, improving the positioning effect of the bracket on the soft-pack cell, thereby improving the reliability of the battery pack.

[0009] Optionally, in each side-sealing positioning groove, the included angle between the two positioning groove sides is A, satisfying: 1°≤A≤3°. This ensures that the width of the opening end of the side-sealing positioning groove is sufficient to guide the insertion of the side-sealing plate, while also minimizing the inclination angle of the positioning groove side, resulting in a smaller gap between the side-sealing positioning groove and the side-sealing edge. This helps ensure the positioning effect of the bracket on the side-sealing edge, thereby improving the bracket's positioning effect on the battery cell.

[0010] Optionally, along the first direction, the side sealing positioning groove has two opposing positioning groove sides, and at least one positioning groove side has a chamfer at the end away from the end plate. In this way, during assembly, the size of the open end of the side sealing positioning groove can be increased by chamfering to improve the guiding effect of the side sealing positioning groove on the side sealing edge, and the sharp corners of the bracket can be reduced to avoid scratching the outer surface of the soft-pack battery cell.

[0011] Optionally, the chamfer can be a beveled angle. This not only provides guidance during assembly but also allows the bracket to save more material, thus contributing to weight reduction.

[0012] Optionally, the side seal positioning groove has a width dimension along the first direction; The minimum width dimension Wd of the side sealing positioning groove is: 0.3mm≤Wd≤0.55mm; this ensures that the gap between the side sealing positioning groove and the side sealing edge is appropriate, which can guarantee both ease of assembly and the positioning effect of the bracket on the battery cell. And / or, the minimum width dimension Wd of the side sealing positioning groove is 1 to 2 times the thickness of the side sealing edge of the soft-pack battery cell; in this way, the gap between the side sealing positioning groove and the side sealing edge is appropriate, which helps to ensure the positioning effect of the bracket on the soft-pack battery cell.

[0013] Optionally, the side sealing positioning groove has a length dimension Ld along the direction perpendicular to the end plate, satisfying: 7mm≤Ld≤15mm; thus, the side sealing positioning groove and the side sealing edge have a suitable matching length, which helps to ensure the positioning effect of the bracket on the battery cell; And / or, along the direction perpendicular to the end plate, the side sealing positioning groove has a length dimension Ld, and the side plate has a height dimension Hcb, satisfying: 70%Hcb≤Ld≤95%Hcb; thus, the side plate and the side sealing edge are properly matched, which is conducive to ensuring the positioning effect of the side plate on the side sealing edge, and the distance between the side sealing edge and the end plate is appropriate, so as to control the length of the tab of the soft pack cell, control the space occupied by the tab, improve the internal space utilization of the battery pack, and ensure the energy density of the battery pack.

[0014] Optionally, the bracket also includes a corner positioning block, which is located on the same side of the end plate as the side plate. One end of the corner positioning block is connected to the corner of the end plate, and a positioning groove is provided on the surface of the corner positioning block facing the perpendicular line of the end plate. The positioning groove extends in a direction perpendicular to the end plate and penetrates the surface of the corner positioning block away from the end plate. In this way, the positioning groove of the corner positioning block can cooperate with adjacent cells, which can both increase the positioning effect of the bracket on the cells and improve the protection of the bracket for the cells.

[0015] Optionally, the tab assembly includes a first tab through-hole and a second tab through-hole, which are spaced apart along a second direction parallel to the plane of the end plate and perpendicular to the first direction. This allows the positive and negative tabs of the pouch cell to be located on the same side of the electrode assembly, sharing a common height space, which improves the compactness of the battery pack structure and increases energy density.

[0016] Optionally, multiple first ribs are provided on the end plate surface away from the side plate. Each first rib corresponds one-to-one with a first tab perforation, and along a first direction, each first rib is located on one side of the corresponding first tab perforation and is spaced apart from the corresponding first tab perforation to limit the bending space of the first tab. In this way, by providing first ribs on the end plate, the electrical distance between the tabs of two adjacent cells can be increased, which helps to improve the reliability of the battery pack.

[0017] Optionally, the height H1 of the first rib is 1.6mm to 3.6mm. This makes the height of the first rib suitable, allowing it to protrude significantly from the support surface, which is beneficial for effectively increasing the electrical distance and determining the bending direction of the electrode tab, while also controlling its height dimension, which is beneficial for controlling the amount of material used and the height space occupied by the first rib, thereby improving the economy and energy density of the battery pack.

[0018] Optionally, multiple second ribs are provided on the end plate surface away from the side plate. Each second rib corresponds one-to-one with a second tab perforation, and along the first direction, each second rib is located on one side of the corresponding second tab perforation and is spaced apart from it to define the bending space of the second tab. Thus, by providing second ribs on the end plate, the electrical distance between the tabs of two adjacent cells can be increased, which helps improve the reliability of the battery pack.

[0019] Optionally, the height H2 of the second rib is 1.6mm to 3.6mm. This makes the height of the second rib suitable, allowing it to protrude significantly from the support surface, which is beneficial for effectively increasing the electrical distance and determining the bending direction of the electrode tab, while also controlling its height dimension, which is beneficial for controlling the amount of material used and the height space occupied by the second rib, thereby improving the economy and energy density of the battery pack.

[0020] Optionally, the cross-section of the first tab through hole is rectangular, with one end being the tab insertion end and the other end being the tab exit end. From the tab exit end towards the tab insertion end, the distance between the two hole walls of the first tab through hole gradually increases along a first direction. The cross-section is the first tab through hole section obtained by cutting the first tab through hole with a plane perpendicular to the axis of the first tab through hole. The structure of the second tab through hole is the same as that of the first tab through hole. This allows for a larger dimension at the end of the first tab through hole used for tab insertion, improving the ease of inserting the tab into the first tab through hole and thus increasing assembly efficiency.

[0021] Optionally, the included angle B between the two hole walls of the first electrode tab through hole along the first direction is 10°~25°; thus, the included angle between the two hole walls of the first electrode tab through hole along the first direction is appropriate, so as to guide the insertion of the electrode tab and avoid the two hole walls of the first electrode tab through hole being too inclined, which would affect the installation of other structural components. And / or, the angle between the two hole walls of the first tab perforation along the first direction that are closer to the corresponding tab bending direction and the tab insertion direction is smaller than the angle between the other hole wall and the tab insertion direction; thus, the entire pouch cell is positioned closer to the tab bending direction, resulting in a better fit between the vertically extending surface of the pouch cell and the hole wall with a smaller inclination of the first tab perforation. This facilitates the combination of the top seal of the pouch cell and the angled clamping bracket formed by the tab bending, thereby improving the stability of the pouch cell mounted on the bracket.

[0022] Optionally, the bracket includes two side plates, with each side of the end plate connected to one side plate; this increases the mating area between the bracket and the pouch cell, improves the positioning effect of the bracket on the pouch cell, and thus improves the reliability of the battery pack. And / or, multiple busbar mounting slots are provided on the end plate surface away from the side plate, and the busbar mounting slots and the tab hole group are staggered along the first direction; in this way, the busbar mounting slots can be used to position and install the busbar, improve the busbar installation efficiency, and thus improve the battery pack production efficiency. And / or, a plurality of riveting post groups are provided on the end plate surface away from the side plate. Each riveting post group includes at least one riveting post. The riveting post groups and the tab hole groups are staggered along the first direction. The riveting posts are configured as positioning busbars. In this way, by cooperating with the busbars, the stability of the busbars installed on the bracket can be improved, and the busbars can be prevented from shaking relative to the bracket, thereby improving the reliability of the connection between the busbars and the tabs. And / or, a plate support block is provided on the end plate surface away from the side plate, and the plate support block is configured to support the BMS plate. In this way, by supporting the BMS plate with the plate support block, the flatness of the surface of the bracket used to support the BMS plate can be reduced, thereby improving the support stability of the bracket for the BMS plate; in addition, by supporting the BMS plate with the plate support block, a portion of the BMS plate can be spaced apart from the bracket, which helps to increase the heat dissipation space of the BMS plate and improve the heat dissipation efficiency of the BMS plate.

[0023] According to a second aspect of this application, a battery module is provided, the battery module including a busbar, a pouch cell, and the aforementioned bracket; there are multiple busbars; the multiple busbars are mounted on an end plate, and the busbars and the tab hole group are staggered along a first direction; there are multiple pouch cells, each pouch cell having a tab, a cell body, and a side seal, the pouch cell corresponding one-to-one with the tab hole group and the side seal positioning groove, the tab of each pouch cell passing through the corresponding tab hole group, and the end of the side seal of each pouch cell near the end plate being inserted into the corresponding side seal positioning groove; wherein, the multiple busbars electrically connect the multiple pouch cells. In this way, by cooperating with the side sealing positioning groove and the side sealing edge of the soft-pack cell, the contact area between the bracket and the soft-pack cell can be increased, improving the positioning effect of the soft-pack cell and thus improving the reliability of the battery pack. At the same time, the side sealing edge of the soft-pack cell can be flattened, eliminating the need for bending and gluing, which simplifies the process, effectively avoids the side sealing edge from hindering the assembly between the soft-pack cell and the bracket, and avoids the increase in weight caused by glue application, thereby increasing the energy density of the battery pack.

[0024] According to a third aspect of this application, a battery pack is provided, comprising a housing and the aforementioned battery module; the battery module is disposed within the housing. Thus, by cooperating with the side sealing positioning groove and the side sealing edge of the pouch cell, the mating area between the support and the pouch cell can be increased, improving the positioning effect of the pouch cell and thus enhancing the reliability of the battery pack. Furthermore, the side sealing edge of the pouch cell can be flattened, eliminating the need for bending and adhesive application, simplifying the process, effectively avoiding obstruction of the assembly between the pouch cell and the support by the side sealing edge, and avoiding the increase in weight caused by adhesive application, thereby increasing the energy density of the battery pack.

[0025] According to a fourth aspect of this application, this application provides an electrical device that includes the aforementioned battery pack. Thus, by cooperating with the side sealing edge of the pouch cell through the side sealing positioning groove, the mating area between the support and the pouch cell can be increased, improving the positioning effect of the pouch cell and thereby enhancing the reliability of the battery pack and the electrical device.

[0026] In the bracket of this application embodiment, the side sealing positioning groove cooperates with the side sealing edge of the soft-pack cell, which can increase the cooperation area between the bracket and the soft-pack cell, improve the positioning effect of the soft-pack cell, thereby improving the reliability of the battery pack. It can also make the side sealing edge of the soft-pack cell flat, without bending and applying glue, which can simplify the process, effectively avoid the side sealing edge from hindering the assembly between the soft-pack cell and the bracket, and avoid the increase in weight caused by glue application, thereby improving the energy density of the battery pack.

[0027] Other features and advantages of this application will be described in detail in the following detailed description section. Attached Figure Description

[0028] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0029] To gain a more complete understanding of this application and its beneficial effects, the following description will be provided in conjunction with the accompanying drawings, wherein the same reference numerals in the following description denote the same parts.

[0030] Figure 1 This is a schematic diagram of the structure of the battery pack provided in an exemplary embodiment of this application; Figure 2 This is a schematic diagram of the structure of the battery module provided in an exemplary embodiment of this application; Figure 3 This is a schematic diagram of the structure of the bracket provided in an exemplary embodiment of this application; Figure 4 This is a side view of the bracket provided in an exemplary embodiment of this application; Figure 5 This is a partial structural diagram provided in an exemplary embodiment of this application; Figure 6 yes Figure 3 Sectional view of AA; Figure 7 This is a schematic diagram of the soft-pack battery cell and its bracket in an exemplary embodiment of this application.

[0031] Explanation of reference numerals in the attached figures: 1000 - Battery pack; 10 - Busbar; 20-Bracket; 21-End plate; 211-Busbar mounting slot; 213-Plate support block; 2151-First electrode tab through hole; 2152-Second electrode tab through hole; 2161-Electrode tab insertion end; 2162-Electrode tab exit end; 217-Electrode tab hole assembly; 22-Side panel; 221-Side sealing positioning groove; 222-Side side of positioning groove; 223-Chamfer; 23-Corner positioning block; 231-Positioning groove; 241 - First reinforcing bar; 242 - Second reinforcing bar; 25-Riveted post; 30 - Outer shell; 31 - Box body; 32 - Box lid; 400-battery module; 40-Soft-pack battery cell; 41-Electrical tab; 42-Battery cell body; 43-Side seal. Detailed Implementation

[0032] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the protection scope of this application.

[0033] Before introducing the bracket, battery module, battery pack and power device provided in the embodiments of this application, the preamble of the embodiments of this application will be introduced first.

[0034] In some feasible implementations, the pouch cell includes a packaging shell, electrode assemblies, and tabs. The packaging shell is an aluminum-plastic film, comprising an outer nylon layer, a middle aluminum foil layer, and an inner hot-melt adhesive layer. The electrode assembly can be a stacked electrode assembly or a wound electrode assembly. Before packaging the pouch cell, the aluminum-plastic film is perforated, so that one side of the aluminum-plastic film is convex and the other side is recessed. Simultaneously, one end of the positive tab is welded to the positive current collector of the electrode assembly, and one end of the negative tab is welded to the negative current collector of the electrode assembly. Then, tab adhesive is applied to the corresponding packaging areas of the positive and negative tabs. Next, the aluminum-plastic film is wrapped around the electrode assembly, the end of the positive tab near the electrode assembly, and the end of the negative tab near the electrode assembly, with the electrode assembly located within the perforated recess of the aluminum-plastic film. Then, the formed sealing edges of the aluminum-plastic film are hot-pressed to seal and bond the aluminum-plastic film to the sides of the electrode assembly, forming a side seal and giving the aluminum-plastic film a bag-like structure. Then, liquid is injected into the aluminum-plastic film, and the parts of the aluminum-plastic film covering the positive and negative tabs are sealed to form a top seal.

[0035] The welding of the tabs to the busbars requires bending, and considering the energy density of the battery pack, the tab thickness is approximately 0.2mm, resulting in relatively low tab rigidity. Consequently, when inserting the tabs into the bracket, the tab holes on the bracket are relatively large to ensure ease of insertion. This leads to a larger clearance between the bracket and the tab, resulting in poor positioning of the pouch cells by the bracket and affecting the reliability of the battery pack.

[0036] Furthermore, when assembling the pouch cells with the bracket, it is not intuitive and convenient to determine whether the pouch cells are aligned with the preset installation positions on the bracket. This results in blind insertion of the tabs on the bracket, relying entirely on experience, leading to low assembly efficiency.

[0037] Furthermore, before assembling the pouch cell with the support frame, the side seal of the pouch cell is usually bent to fit against the end of the protruding package. However, during assembly, the side seal rebounds due to stress at the bent area, blocking the insertion of the tabs. If adhesive is used to fix the side seal between the side seal and the end of the protruding package, it increases the weight of the battery pack, negatively impacting its energy density.

[0038] Based on this, the embodiments of this application provide a bracket, a battery module, a battery pack, and an electrical device, which can reduce the gap between the bracket and the battery cell, improve the positioning effect of the bracket on the soft-pack battery cell, thereby improving the reliability of the battery pack. It also makes the insertion and fitting of the soft-pack battery cell and the bracket more visible, which helps to improve the alignment of the battery cell with the preset installation position on the bracket, improves the assembly efficiency, and avoids the insertion obstruction caused by the bending of the side sealing edge or the increase in weight caused by the glue fixation.

[0039] The following combination Figures 1 to 7 The present application provides a detailed description of a bracket 20, a battery module 400, a battery pack 1000, and an electrical device, as provided in the embodiments of this application.

[0040] An embodiment of this application provides an electrical device that includes a battery pack 1000.

[0041] It is understood that electrical appliances can be, but are not limited to, vehicles, ships, aircraft, electric toys, power tools, electric vehicles, ships, spacecraft, etc. When the electrical appliance is a vehicle, it includes, but is not limited to, trains, electric vehicles, fuel vehicles, hybrid vehicles, etc.

[0042] Please see Figure 1 An embodiment of this application provides a battery pack 1000, which includes a housing 30 and a battery module 400. The battery module 400 is disposed within the housing 30.

[0043] It is understood that the battery pack 1000 mentioned in the embodiments of this application refers to a single physical module that includes multiple cells 40 (also known as battery cells or single cells) to provide higher voltage and capacity.

[0044] It is understandable that the outer casing 30 limits the space for installing the battery cell 40.

[0045] It is understood that the outer casing 30 may include a cover 32 and a housing 31. The cover 32 and the housing 31 are closed to protect the battery cell 40 and prevent external moisture, dust and other factors from affecting the use of the battery cell 40.

[0046] It is understood that the battery cell 40 mentioned in the embodiments of this application may include lithium-ion secondary batteries, lithium-ion primary batteries, lithium-sulfur batteries, sodium-lithium-ion batteries, sodium-ion batteries, or magnesium-ion batteries, etc. The battery cell 40 may be cylindrical, flat, cuboid, or other shapes. The battery cell 40 is generally classified into three types according to its packaging method: cylindrical battery cells, square battery cells, and pouch battery cells.

[0047] This application uses cell 40 as an example of a sodium-ion pouch cell.

[0048] Specifically, the battery cell 40 includes a package, an electrode assembly, and an electrolyte. The package is used to contain the electrode assembly and the electrolyte. The electrode assembly includes a positive electrode, a negative electrode, and a separator that insulates and isolates the positive and negative electrode. The battery cell 40 mainly relies on the movement of metal ions between the positive and negative electrode to charge and discharge.

[0049] It is understandable that this 1000 battery pack is primarily used in electrical equipment. Electrical equipment includes, but is not limited to, vehicles, ships, aircraft, electric toys, power tools, electric vehicles, electric cars, ships, and spacecraft.

[0050] Please see Figure 2 This application provides a battery module 400. The battery module 400 includes busbars 10, pouch cells 40, and brackets 20. Multiple busbars 10 are provided. Multiple busbars 10 are mounted on an end plate 21. The busbars 10 and tab hole groups 217 are staggered along a first direction. Multiple pouch cells 40 are provided. Each pouch cell 40 has tabs 41, a cell body 42, and a side seal 43. Each pouch cell 40 corresponds one-to-one with the tab hole group 217 and the side seal positioning groove 221. The tab 41 of each pouch cell 40 passes through the corresponding tab hole group 217. The end of the side seal 43 of each pouch cell 40 near the end plate 21 is inserted into the corresponding side seal positioning groove 221. The multiple busbars 10 electrically connect the multiple pouch cells 40.

[0051] It is understandable that bracket 20 is an insulating component, such as bracket 20 being a plastic bracket 20.

[0052] It is understandable that busbar 10 is a metal component. For example, busbar 10 is an aluminum busbar.

[0053] It is understood that bus 10 can connect multiple pouch cells 40 in series or in parallel. Specifically, bus 10 connects multiple pouch cells 40 in series.

[0054] For example, busbar 10 can be secured to bracket 20.

[0055] It is understood that each tab hole group 217 includes two tab holes, the positive tab of each pouch cell 40 is inserted through one tab hole of the corresponding tab hole group 217, and the negative tab of the pouch cell 40 is inserted through the other tab hole of the corresponding tab hole group 217.

[0056] It is understandable that, in order to facilitate the smooth insertion of the tab 41 through the tab hole, the width of the tab hole in the thickness direction of the tab 41 is greater than the thickness of the tab 41. For example, if the thickness of the tab 41 is 0.2 mm, the width of the tab hole is 2.4 mm to 2.7 mm. Correspondingly, the fitting clearance between the tab 41 and the tab hole is 2.2 mm to 2.5 mm.

[0057] Please see Figure 3 , Figure 4 and Figure 5 This application provides a bracket 20, which includes an end plate 21 and a side plate 22. The end plate 21 has a plurality of tab hole groups 217, which are arranged sequentially along a first direction. The side plate 22 is located on one side of the end plate 21, connected to the edge of the end plate 21, and extends along the first direction. A plurality of side sealing positioning grooves 221 are provided on the surface of the side plate 22 facing the end plate 21. The plurality of side sealing positioning grooves 221 are arranged sequentially along the first direction. Each side sealing positioning groove 221 corresponds one-to-one with a tab hole group 217, and the end of each side sealing positioning groove 221 away from the end plate 21 penetrates through the side plate 22. Each side sealing positioning groove corresponds one-to-one with a tab hole group, and each tab hole group corresponding to a side sealing positioning groove is configured to cooperate with the same pouch cell.

[0058] It is understandable that the tab hole group corresponds one-to-one with the battery cell, with the tab of each battery cell passing through the corresponding tab hole group, and the side seal of each battery cell passing through the side seal positioning groove corresponding to the tab hole group.

[0059] It is understood that the end of the side sealing positioning groove 221 away from the end plate 21 passes through the side plate 22, making the end of the side sealing positioning groove 221 away from the end plate 21 an open end, so that the side sealing edge 43 of the soft-pack battery cell 40 can be inserted.

[0060] For example, the first direction is perpendicular to the large surface of the pouch cell 40.

[0061] Specifically, when assembling the bracket 20 and the pouch cell 40, the bracket 20 is first placed at one end of the pouch cell 40, with the end of the tab 41 of the pouch cell 40 facing the bracket 20. The side sealing positioning grooves 221 on the same side plate 22 correspond one-to-one with the pouch cell 40, and the pouch cell 40 corresponds one-to-one with the tab hole group 217. Next, the side sealing edge 43 of the pouch cell 40 is moved to the end of the corresponding side sealing positioning groove 221 away from the end plate 21. Then, the pouch cell 40 and the bracket 20 are moved towards each other, so that the end of the side sealing edge 43 near the bracket 20 is inserted into the side sealing positioning groove 221 from its open end. As the side sealing edge 43 engages with the side sealing positioning groove 221, the tab 41 moves towards the corresponding tab hole until it protrudes from the corresponding tab hole. The tab 41 is then bent and welded to the busbar 10. Thus, the assembly of the bracket 20 and the soft-pack battery cell 40 is completed.

[0062] For example, the mating gap between the side sealing edge 43 and the side sealing positioning groove 221 is 0.1mm to 0.2mm. For instance, the thickness of the side sealing edge 43 is 0.3mm, and the minimum width of the portion where the side sealing positioning groove 221 mates with the side sealing edge 43 is 0.4mm to 0.5mm. Thus, compared to some feasible embodiments where the mating gap between the electrode tab 41 and the bracket 20 is 2.2mm to 2.5mm to ensure easy insertion of the electrode tab 41, this embodiment, based on the mating of the side sealing edge 43 and the side sealing positioning groove 221, can reduce the mating gap between the soft-pack battery cell 40 and the bracket 20, improving the positioning effect of the bracket 20 on the soft-pack battery cell 40.

[0063] In this embodiment, by cooperating with the side sealing edge 43 of the soft-pack cell 40 through the side sealing positioning groove 221, the contact area between the bracket 20 and the soft-pack cell 40 can be increased, thereby improving the positioning effect of the soft-pack cell 40 and thus improving the reliability of the battery pack 1000. At the same time, the side sealing edge 43 of the soft-pack cell 40 can be flattened, eliminating the need for bending and gluing, which simplifies the process, effectively avoids the side sealing edge 43 from hindering the assembly between the soft-pack cell 40 and the bracket 20, and avoids the increase in weight caused by glue application, thereby increasing the energy density of the battery pack 1000.

[0064] Please see Figure 3 , Figure 4 and Figure 5In some embodiments, the side sealing positioning groove 221 also extends through the side plate 22 along its thickness direction. This allows for direct external observation of the position of the soft-pack battery cell 40 relative to the bracket 20. During assembly, the alignment of the side sealing edge 43 with the side sealing positioning groove 221 can be directly determined through external observation, facilitating the understanding of the alignment relationship between the tab 41 and the tab hole group 217. This makes the alignment between the soft-pack battery cell 40 and the bracket 20 clear and intuitive, improving assembly efficiency.

[0065] For example, when the pouch cell 40 is fitted with the bracket 20, the end of the side seal 43 extends through the side seal positioning groove 221 along the thickness direction of the side plate 22. This makes the side seal 43 highly visible, which is beneficial for CCD (Charge-Coupled Device) camera recognition, thereby facilitating adaptation to automated production.

[0066] Please see Figure 5 In some embodiments, in the first direction, the side sealing positioning groove 221 has two opposing positioning groove sides 222, and the distance between the two positioning groove sides 222 gradually decreases along the direction close to the end plate 21. In this way, the wider end of the side sealing positioning groove 221 can guide the insertion of the side sealing edge 43, improving the ease of assembly, and the narrower part of the side sealing positioning groove 221 can constrain the side sealing edge 43, improving the positioning effect of the bracket 20 on the soft-pack cell 40, thereby improving the reliability of the battery pack 1000.

[0067] Please see Figure 5 In some embodiments, in each side sealing positioning groove 221, the included angle between the two positioning groove sides 222 is A, satisfying: 1°≤A≤3°. This ensures that the width of the opening end of the side sealing positioning groove 221 is sufficient to guide the insertion of the side sealing plate, while also minimizing the inclination angle of the positioning groove sides 222, resulting in a smaller gap between the side sealing positioning groove 221 and the side sealing edge 43. This helps ensure the positioning effect of the bracket 20 on the side sealing edge 43, thereby improving the positioning effect of the bracket 20 on the battery cell.

[0068] It is understood that the included angle A between the two positioning groove sides 222 is including but not limited to 1°, 1.07°, 1.13°, 1.20°, 1.27°, 1.33°, 1.4°, 1.47°, 1.53°, 1.60°, 1.67°, 1.73°, 1.80°, 1.87°, 1.93°, 2°, 2.07°, 2.13°, 2.20°, 2.27°, 2.33°, 2.40°, 2.47°, 2.5°, 2.60°, 2.67°, 2.73°, 2.80°, 2.87°, 2.93°, and 3°.

[0069] It is understandable that the two positioning groove sides 222 of the side sealing positioning groove 221 are symmetrically arranged, so that the included angle between the positioning groove side 222 and the vertical is equal.

[0070] Please see Figure 5 In some embodiments, along the first direction, the side sealing positioning groove 221 has two opposing positioning groove sides 222. At least one positioning groove side 222 has a chamfer 223 at the end away from the end plate 21. In this way, during assembly, the chamfer 223 can be used to increase the size of the open end of the side sealing positioning groove 221 to improve the guiding effect of the side sealing edge 43, and the sharp corners of the bracket 20 can be reduced to avoid scratching the outer surface of the soft-pack battery cell 40.

[0071] Please see Figure 5 In some embodiments, chamfer 223 is a beveled angle. This serves both as a guide during assembly and allows the bracket 20 to use less material, thus contributing to weight reduction.

[0072] Please see Figure 5 In some embodiments, the side sealing positioning groove 221 has a width dimension along the first direction, and the minimum width dimension Wd of the side sealing positioning groove 221 is: 0.3mm≤Wd≤0.55mm. In this way, the fitting gap between the side sealing positioning groove 221 and the side sealing edge 43 is appropriate, which can ensure both ease of assembly and the positioning effect of the bracket 20 on the battery cell.

[0073] It can be understood that when the distance between the two sides 222 of the side sealing positioning groove 221 remains unchanged, the minimum width dimension Wd is the width dimension of any position of the side sealing positioning groove 221.

[0074] It is understandable that when the distance between the two side surfaces 222 of the side sealing positioning groove 221 changes, for example, if the distance between the two side surfaces 222 gradually decreases along the direction closer to the end plate 21, then the minimum width dimension Wd is the dimension of the part of the side sealing positioning groove 221 near the end plate 21. In this state, in order to reduce corner stress, the ends of the two side surfaces 222 near the end plate 21 are connected by a curved surface, such as... Figure 5 As shown.

[0075] It is understood that the minimum width dimension Wd includes, but is not limited to, 0.3mm, 0.31mm, 0.32mm, 0.33mm, 0.34mm, 0.35mm, 0.36mm, 0.37mm, 0.39mm, 0.4mm, 0.41mm, 0.42mm, 0.43mm, 0.44mm, 0.46mm, 0.47mm, 0.48mm, 0.49mm, 0.5mm, 0.51mm, 0.52mm, 0.53mm, 0.54mm, and 0.55mm.

[0076] For example, the minimum width dimension Wd is 0.4mm or 0.5mm.

[0077] In some embodiments, the minimum width Wd of the side sealing positioning groove is 1 to 2 times the thickness of the side sealing edge of the pouch cell. This ensures a suitable clearance between the side sealing positioning groove and the side sealing edge, which helps to guarantee the positioning effect of the bracket on the pouch cell.

[0078] It is understood that the minimum width dimension Wd of the side sealing positioning groove is, but is not limited to, 1.1 times, 1.2 times, 1.5 times, 1.6 times, 1.7 times, and 2 times the thickness of the side sealing edge of the soft-pack battery cell.

[0079] Please see Figure 5 In some embodiments, the side sealing positioning groove 221 has a length dimension Ld along the direction perpendicular to the end plate 21, satisfying: 7mm≤Ld≤15mm. This ensures that the side sealing positioning groove 221 and the side sealing edge 43 have a suitable matching length, which helps to ensure the positioning effect of the bracket 20 on the battery cell.

[0080] It is understood that the length dimension Ld includes, but is not limited to, 7mm, 7.3mm, 7.6mm, 7.9mm, 8.2mm, 8.5mm, 8.8mm, 9.1mm, 9.5mm, 9.7mm, 10mm, 10.3mm, 10.6mm, 10.9mm, 11.2mm, 11.5mm, 11.8mm, 12.1mm, 12.4mm, 12.7mm, 13mm, 13.3mm, 13.6mm, 13.9mm, 14.2mm, 14.3mm, 14.5mm, 14.6mm, 14.8mm, and 15mm.

[0081] For example, the length dimension Ld can be 9.5mm.

[0082] Please see Figure 5 In some embodiments, the side sealing positioning groove has a length dimension Ld along the direction perpendicular to the end plate, and the side plate has a height dimension Hcb, satisfying: 70%Hcb≤Ld≤95%Hcb. This ensures a proper fit between the side plate and the side sealing edge, facilitating effective positioning of the side plate relative to the side sealing edge. It also allows for a suitable distance between the side sealing edge and the end plate, controlling the length of the tabs in the pouch cell, limiting the space occupied by the tabs, improving the utilization rate of the internal space of the battery pack, and ensuring the energy density of the battery pack.

[0083] It is understood that the length dimension Ld of the side sealing positioning groove includes, but is not limited to, 70%Hcb, 72%Hcb, 75%Hcb, 78%Hcb, 81%Hcb, 84%Hcb, 86%Hcb, 89%Hcb, 90%Hcb, 91%Hcb, 92%Hcb, 93%Hcb, 94%Hcb, and 95%Hcb.

[0084] Please see Figure 3 and Figure 4 In some embodiments, the bracket 20 further includes a corner positioning block 23. The corner positioning block 23 and the side plate 22 are located on the same side of the end plate 21. One end of the corner positioning block 23 is connected to the corner of the end plate 21, and a positioning groove 231 is provided on the surface of the corner positioning block 23 facing the perpendicular line of the end plate 21. The positioning groove 231 extends in a direction perpendicular to the end plate 21 and penetrates the surface of the corner positioning block 23 away from the end plate 21. In this way, the positioning groove 231 of the corner positioning block 23 can cooperate with adjacent cells, which can both increase the positioning effect of the bracket 20 on the cells and improve the protection of the cells by the bracket 20.

[0085] For example, the bracket 20 is a one-piece molded part. For instance, the end plate 21, side plate 22 and corner positioning block 23 are integrally injection molded.

[0086] Please see Figure 3 In some embodiments, the tab assembly 217 includes a first tab through-hole 2151 and a second tab through-hole 2152. The first tab through-hole 2151 and the second tab through-hole 2152 are spaced apart along a second direction. The second direction is parallel to the plane of the end plate 21 and perpendicular to the first direction. This allows the positive and negative tabs of the pouch cell 40 to be located on the same side of the electrode assembly of the pouch cell 40, enabling the positive and negative tabs to share a common height space, which helps to improve the structural compactness of the battery pack 1000 and thus increase energy density.

[0087] It is understandable that the first electrode perforation 2151 is used to pass through one of the positive electrode and the negative electrode, and the second electrode perforation 2152 is used to pass through the other.

[0088] Please see Figure 3 In some embodiments, a plurality of first ribs 241 are provided on the surface of the end plate 21 away from the side plate 22. Each first rib 241 corresponds one-to-one with a first tab perforation 2151. Along a first direction, each first rib 241 is located on one side of the corresponding first tab perforation 2151 and is spaced apart from the corresponding first tab perforation 2151 to define the bending space of the first tab. Thus, by providing first ribs 241 on the end plate 21, the electrical distance between the tabs 41 of two adjacent cells can be increased, which helps to improve the reliability of the battery pack 1000.

[0089] In addition, the bending direction of the electrode 41 passing through the first electrode hole 2151 can be indicated by the first rib 241, so that the electrode 41 adjacent to the first rib 241 bends away from the first rib 241.

[0090] Please see Figure 5In some embodiments, the height H1 of the first rib 241 is 1.6mm to 3.6mm. This makes the height of the first rib 241 appropriate, allowing it to protrude significantly from the surface of the bracket 20, which is beneficial for effectively increasing the electrical distance and determining the bending direction of the tab 41. At the same time, its height can be controlled, which is beneficial for controlling the amount of material used and the height space occupied by the first rib 241, thereby improving the economy and energy density of the battery pack 1000.

[0091] It is understood that the height dimension H1 of the first rib 241 includes, but is not limited to, 1.6mm, 1.67mm, 1.74mm, 1.81mm, 1.88mm, 1.94mm, 2mm, 2.08mm, 2.15mm, 2.22mm, 2.29mm, 2.36mm, 2.43mm, 2.5mm, 2.57mm, 2.63mm, 2.7mm, 2.77mm, 2.84mm, 2.91mm, 2.98mm, 3mm, 3.12mm, 3.19mm, 3.26mm, 3.32mm, 3.39mm, 3.46mm, 3.53mm, and 3.6mm.

[0092] Please see Figure 3 In some embodiments, a plurality of second ribs 242 are provided on the surface of the end plate 21 away from the side plate 22. Each second rib 242 corresponds one-to-one with a second tab perforation 2152, and along the first direction, each second rib 242 is located on one side of the corresponding second tab perforation 2152 and is spaced apart from the corresponding second tab perforation 2152 to limit the bending space of the second tab 41. In this way, by providing second ribs 242 on the end plate 21, the electrical distance between the tabs 41 of two adjacent cells can be increased, which is beneficial to improving the reliability of the battery pack 1000.

[0093] In addition, the second rib 242 can indicate the bending direction of the tab 41 that passes through the second tab hole 2152, so that the tab 41 adjacent to the second rib 242 bends away from the second rib 242.

[0094] It is understood that the specific positional relationship of the first rib 241 relative to the first tab through-hole 2151 is set according to the actual assembly requirements. The specific positional relationship of the second rib 242 relative to the second tab through-hole 2152 is also set according to the actual assembly requirements. Specifically, the positive and negative tabs of each pouch cell 40 are bent in different directions. In this way, the first rib 241 and the second rib 242 are located on both sides of the tab hole group 217 along the first direction.

[0095] Please see Figure 6In some embodiments, the height H2 of the second rib 242 is 1.6mm to 3.6mm. This makes the height of the second rib 242 suitable, allowing it to protrude significantly from the surface of the bracket 20, which is beneficial for effectively increasing the electrical distance and determining the bending direction of the tab 41. At the same time, its height can be controlled, which is beneficial for controlling the amount of material used and the height space occupied by the second rib 242, thereby improving the economy and energy density of the battery pack 1000.

[0096] It is understood that the height dimension H2 of the second rib 242 includes, but is not limited to, 1.6mm, 1.67mm, 1.74mm, 1.81mm, 1.88mm, 1.94mm, 2mm, 2.08mm, 2.15mm, 2.22mm, 2.29mm, 2.36mm, 2.43mm, 2.5mm, 2.57mm, 2.63mm, 2.7mm, 2.77mm, 2.84mm, 2.91mm, 2.98mm, 3mm, 3.12mm, 3.19mm, 3.26mm, 3.32mm, 3.39mm, 3.46mm, 3.53mm, and 3.6mm.

[0097] Specifically, the height of the first reinforcing bar 241 is equal to the height of the second reinforcing bar 242.

[0098] Please see Figure 6 and Figure 7 In some embodiments, the cross-section of the first tab through-hole 2151 is rectangular. One end of the first tab through-hole 2151 is the tab insertion end 2161, and the other end is the tab exit end 2162. From the tab exit end 2162 towards the tab insertion end 2161, the distance between the two hole walls of the first tab through-hole 2151 gradually increases along a first direction. The cross-section is the first tab through-hole profile obtained by cutting the first tab through-hole with a plane perpendicular to the axis of the first tab through-hole. This results in a larger size at the end of the first tab through-hole 2151 where the tab 41 is inserted, which improves the ease of insertion of the tab 41 into the first tab through-hole 2151, thereby improving assembly efficiency.

[0099] In some embodiments, the structure of the second tab through hole 2152 is the same as that of the first tab through hole 2151. This makes the size of the end of the second tab through hole 2152 into which the tab 41 is inserted larger, which helps to improve the ease of operation of inserting the tab 41 into the first tab through hole 2151, thereby improving assembly efficiency.

[0100] Please see Figure 6In some embodiments, the included angle B between the two walls of the first electrode tab through hole 2151 along the first direction is 10° to 25°. This makes the included angle between the two walls of the first electrode tab through hole 2151 along the first direction appropriate, so as to guide the insertion of the electrode tab 41 and avoid the two walls of the first electrode tab through hole 2151 being too inclined, which would affect the installation of other structural components.

[0101] Please see Figure 6 and Figure 7 In some embodiments, the angle between the two hole walls of the first tab perforation 2151, which is closer to the bending direction of the corresponding tab 41, and the insertion direction of the tab 41 is smaller than the angle between the other hole wall and the insertion direction of the tab 41. This makes the entire pouch cell 40 closer to the bending direction of the tab 41, resulting in better contact between the vertically extending surface of the pouch cell 40 and the hole wall of the first tab perforation 2151 with a smaller inclination. This facilitates the combination of the top seal of the pouch cell 40 and the angled clamping bracket 20 formed by the bending of the tab 41, thereby improving the stability of the pouch cell 40 mounted on the bracket 20. Figure 7 As shown.

[0102] In some embodiments, the bracket 20 includes two side plates 22, and the two sides of the end plate 21 are respectively connected to one side plate 22. In this way, the mating area between the bracket 20 and the soft-pack cell 40 can be increased, the positioning effect of the bracket 20 on the soft-pack cell 40 can be improved, thereby improving the reliability of the battery pack 1000.

[0103] Please see Figure 6 and Figure 7 In some embodiments, a plurality of busbar mounting slots 211 are provided on the surface of the end plate 21 away from the side plate 22, and the busbar mounting slots 211 and the tab hole group 217 are staggered along the first direction. In this way, the busbar 10 can be positioned and installed in the busbar mounting slots 211, improving the installation efficiency of the busbar 10, thereby improving the production efficiency of the battery pack 1000.

[0104] Please see Figure 3 In some embodiments, a plurality of riveting post groups are provided on the surface of the end plate 21 away from the side plate 22. Each riveting post group includes at least one riveting post 25. The riveting post 25 groups and the tab hole groups 217 are staggered along a first direction. The riveting posts 25 are configured to position the busbar 10. Thus, by cooperating with the busbar 10, the stability of the busbar 10 mounted on the bracket 20 can be improved, preventing the busbar 10 from wobbling relative to the bracket 20, thereby improving the reliability of the connection between the busbar 10 and the tab 41.

[0105] For example, the rivet post 25 and the bracket 20 are integrally formed, such as by injection molding.

[0106] Please see Figure 3 In some embodiments, a plate support block 213 is provided on the surface of the end plate 21 away from the side plate 22. The plate support block 213 is configured to support the BMS plate. In this way, by supporting the BMS plate with the plate support block 213, the flatness of the surface of the bracket 20 used to support the BMS plate can be reduced, thereby improving the support stability of the bracket 20 for the BMS plate. In addition, by supporting the BMS plate with the plate support block 213, a portion of the BMS plate can be spaced apart from the bracket 20, which helps to increase the heat dissipation space of the BMS plate and improve the heat dissipation efficiency of the BMS plate.

[0107] For example, the plate support block 213 is integrally disposed with the bracket 20, such as the plate support block 213 and the bracket 20 being integrally injection molded.

[0108] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more features. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0109] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0110] The embodiments, implementation methods, and related technical features of this application can be combined and substituted for each other without conflict.

[0111] The above are merely preferred embodiments of this application and are not intended to limit this application in any way. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of this application without departing from the scope of the technical solution of this application shall still fall within the scope of the technical solution of this application.

Claims

1. A support (20), characterized in that, include: The end plate (21) has a plurality of electrode hole groups (217), which are arranged sequentially along a first direction; Side plate (22), located on one side of end plate (21), the side plate (22) is connected to the edge of end plate (21) and extends along the first direction; Among them, a plurality of side sealing positioning grooves (221) are provided on the surface of the side plate (22) facing the end plate (21). The plurality of side sealing positioning grooves (221) are arranged sequentially along the first direction, and the end of each side sealing positioning groove (221) away from the end plate (21) passes through the side plate (22). The side sealing positioning groove (221) corresponds one-to-one with the tab hole group (217), and each of the side sealing positioning grooves (221) and the corresponding tab hole group (217) is configured to cooperate with the same soft-pack battery cell (40).

2. The bracket (20) according to claim 1, characterized in that, The side sealing positioning groove (221) also penetrates the side plate (22) along the thickness direction of the side plate (22).

3. The bracket (20) according to claim 1, characterized in that, In the first direction, the side sealing positioning groove (221) has two positioning groove sides (222) arranged opposite to each other, and the distance between the two positioning groove sides (222) gradually decreases in the direction close to the end plate (21).

4. The bracket (20) according to claim 3, characterized in that, In each of the side sealing positioning grooves (221), the included angle between the two positioning groove sides (222) is A, which satisfies: 1°≤A≤3°.

5. The stent (20) according to any one of claims 1 to 4, characterized in that, Along the first direction, the side sealing positioning groove (221) has two positioning groove sides (222) arranged opposite to each other, and at least one of the positioning groove sides (222) has a chamfer (223) at the end away from the end plate (21).

6. The bracket (20) according to claim 5, characterized in that, The chamfer (223) is a chamfered angle.

7. The stent (20) according to any one of claims 1 to 4, characterized in that, Along the first direction, the side sealing positioning groove (221) has a width dimension; The minimum width dimension Wd of the side sealing positioning groove (221) is: 0.3mm≤Wd≤0.55mm; And / or, the minimum width dimension Wd of the side sealing positioning groove (221) is 1 to 2 times the thickness of the side sealing edge (43) of the soft-pack battery cell (40).

8. The stent (20) according to any one of claims 1 to 4, characterized in that, Along the direction perpendicular to the end plate (21), the side sealing positioning groove (221) has a length dimension Ld, which satisfies: 7mm≤Ld≤15mm; And / or, along a direction perpendicular to the end plate (21), the side sealing positioning groove (221) has a length dimension Ld, and the side plate (22) has a height dimension Hcb, satisfying: 70%Hcb≤Ld≤95%Hcb.

9. The stent (20) according to any one of claims 1 to 4, characterized in that, The bracket (20) also includes a corner positioning block (23), the corner positioning block (23) and the side plate (22) are located on the same side of the end plate (21), one end of the corner positioning block (23) is connected to the corner of the end plate (21), and the corner positioning block (23) is provided with a positioning groove (231) facing the vertical line of the end plate (21). The positioning groove (231) extends in a direction perpendicular to the end plate (21) and penetrates the surface of the corner positioning block (23) away from the end plate (21).

10. The stent (20) according to any one of claims 1 to 4, characterized in that, The electrode hole group (217) includes a first electrode hole (2151) and a second electrode hole (2152). The first electrode hole (2151) and the second electrode hole (2152) are spaced apart along a second direction, which is parallel to the plane of the end plate (21) and perpendicular to the first direction.

11. The stent (20) according to claim 10, characterized in that, A plurality of first ribs (241) are provided on the surface of the end plate (21) away from the side plate (22). The first ribs (241) correspond one-to-one with the first tab perforation (2151). Along the first direction, each first rib (241) is located on one side of the corresponding first tab perforation (2151) and is spaced apart from the corresponding first tab perforation (2151) to define the bending space of the first tab (41).

12. The bracket (20) according to claim 11, characterized in that, The height dimension H1 of the first rib (241) is 1.6mm~3.6mm.

13. The stent (20) according to claim 10, characterized in that, A plurality of second ribs (242) are provided on the surface of the end plate (21) away from the side plate (22). The second ribs (242) correspond one-to-one with the second electrode tab perforation (2152). Along the first direction, each second rib (242) is located on one side of the corresponding second electrode tab perforation (2152) and is spaced apart from the corresponding second electrode tab perforation (2152) to define the bending space of the second electrode tab (41).

14. The stent (20) according to claim 13, characterized in that, The height dimension H2 of the second rib (242) is 1.6mm~3.6mm.

15. The bracket (20) according to claim 10, characterized in that, The first tab perforation (2151) has a rectangular cross-section. One end of the first tab perforation (2151) is the tab insertion end (2161), and the other end is the tab exit end (2162). From the tab exit end (2162) to the tab insertion end (2161), the distance between the two hole walls of the first tab perforation (2151) gradually increases along the first direction. The cross-section is the first tab perforation (2151) obtained by cutting the first tab perforation (2151) with a plane perpendicular to the axis of the first tab perforation (2151). The structure of the second electrode ear perforation (2152) is the same as that of the first electrode ear perforation (2151).

16. The bracket (20) according to claim 15, characterized in that, The included angle B between the two hole walls of the first electrode perforation (2151) along the first direction is 10°~25°; And / or, the angle between the two holes of the first electrode perforation (2151) that are closer to the bending direction of the corresponding electrode (41) and the electrode (41) insertion direction is smaller than the angle between the other hole and the electrode (41) insertion direction.

17. The stent (20) according to any one of claims 1 to 4, characterized in that, The bracket (20) includes two side plates (22), and the two sides of the end plate (21) are respectively connected to one of the side plates (22); And / or, a plurality of busbar mounting slots (211) are provided on the surface of the end plate (21) away from the side plate (22), and the busbar mounting slots (211) and the tab hole group (217) are staggered along the first direction; And / or, a plurality of riveting post (25) groups are provided on the plate surface of the end plate (21) away from the side plate (22), the riveting post (25) group includes at least one riveting post (25), the riveting post (25) group and the tab hole group (217) are staggered along the first direction, and the riveting post (25) is configured as a positioning busbar (10). And / or, a plate support block (213) is provided on the end plate (21) away from the side plate (22), the plate support block (213) being configured to support the BMS plate.

18. A battery module (400), characterized in that, include: The stent (20) as described in any one of claims 1 to 17; Multiple busbars (10) are mounted on the end plate (21), and the busbars (10) and the tab hole group (217) are staggered along the first direction; and Multiple pouch cells (40) are provided, each pouch cell (40) having a tab (41), a cell body (42), and a side seal (43). Each pouch cell (40) corresponds one-to-one with the tab hole group (217) and the side seal positioning groove (221). The tab (41) of each pouch cell (40) passes through the corresponding tab hole group (217), and the side seal (43) of each pouch cell (40) is inserted into the corresponding side seal positioning groove (221) at the end near the end plate (21). The plurality of busbars (10) electrically connect the plurality of pouch cells (40).

19. A battery pack (1000), characterized in that, include: Outer shell (30); as well as The battery module (400) as described in claim 18 is disposed within the housing (30).

20. An electrical appliance, characterized in that, Includes the battery pack (1000) as described in claim 19.

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