Battery cell stopper, battery cell assembly, and battery

Abstract

The application provides an electric core stop frame, an electric core assembly and a battery. The electric core stop frame comprises a stop frame body (1) and a split side stop frame (2), the stop frame body (1) comprises a first mounting part (3) and a stepped part (4), the stepped part (4) has a stop step, the split side stop frame (2) comprises a second mounting part (5) and a crimping part (6), the second mounting part (5) is fixedly connected with the first mounting part (3), the crimping part (6) is arranged corresponding to the stepped part (4), when the second mounting part (5) is connected with the first mounting part (3), the crimping part (6) cooperates with the step surface of the stop step to form a crimping space (7), and after the second mounting part (5) is fixedly connected with the first mounting part (3), a side extension gap (8) is formed between the crimping part (6) and the step side surface of the stop step. The electric core stop frame can realize the limiting function of the tab and the connecting piece, and avoid the pressure of the tab or the connecting piece on the core pole piece.

Description

Technical Field

[0001] This invention relates to the field of battery technology, and more specifically, to a cell stop bracket, a cell assembly, and a battery. Background Technology

[0002] With the progress of economic globalization and the continuous rise in energy demand, the pursuit of new energy storage units has rapidly become a focus of attention in the field of new energy. Lithium-ion batteries, with their advantages of no memory effect, low self-discharge, high energy density, long cycle life, and clean and pollution-free operation, are beginning to be widely used in electric and hybrid vehicles, as well as portable power banks. As the most crucial energy storage unit, the development of batteries has attracted considerable attention.

[0003] Traditional battery cell stop frames are one-piece structures, and their function is limited to restricting the movement of the stacked cores inside the battery cell. They cannot position the stacked core tabs or connecting pieces, and there is a possibility that the tabs or connecting pieces may press against the stacked core plates. Summary of the Invention

[0004] The main objective of this invention is to provide a cell stop bracket, a cell assembly, and a battery that can effectively limit the position of the tabs and connecting pieces, preventing the tabs or connecting pieces from pressing against the stacked electrode sheets.

[0005] To achieve the above objectives, according to one aspect of the present invention, a battery cell stop frame is provided, comprising a stop frame body and a split-side stop frame. The stop frame body includes a first mounting portion and a stepped portion, the stepped portion having a stop step. The split-side stop frame includes a second mounting portion and a pressing portion. The second mounting portion is fixedly connected to the first mounting portion, and the pressing portion is provided corresponding to the stepped portion. When the second mounting portion and the first mounting portion are connected, the pressing portion cooperates with the step surface of the stop step to form a pressing space. After the second mounting portion and the first mounting portion are fixedly connected, a lateral extension gap is formed between the pressing portion and the step side of the stop step.

[0006] Furthermore, the first mounting part and the second mounting part are connected and fixed together.

[0007] Furthermore, the first mounting part is provided with a plug hole, and the second mounting part is provided with a fixing post, which is plugged into the plug hole.

[0008] Furthermore, the insertion structure of the fixing post and the insertion hole defines the pressing distance between the pressing part and the step surface of the stop step.

[0009] Furthermore, the two opposite sides of the main body of the stop frame are respectively provided with stepped sections, and each stepped section is provided with a separate side stop frame.

[0010] Furthermore, the first mounting part includes a rectangular connecting frame, and the two sides of the stepped part are respectively fixedly connected to the rectangular connecting frame.

[0011] Furthermore, a mounting plate is provided at the frame opening on one side of the rectangular connecting frame, and a fixing connection hole is provided on the mounting plate; and / or, a reinforcing plate is provided inside the rectangular connecting frame.

[0012] Furthermore, the second mounting part includes two rectangular connecting frames arranged opposite each other and a connecting plate connected between the two rectangular connecting frames, and the pressing part includes a pressing plate, which is fixedly connected to the connecting plate.

[0013] Furthermore, the crimped portion and / or stepped portion are provided with strip-shaped holes.

[0014] According to another aspect of the present invention, a battery cell assembly is provided, including a battery cell stop frame and a battery cell body, wherein the battery cell stop frame is the aforementioned battery cell stop frame, and the battery cell stop frame is installed on two opposite sides of the battery cell body.

[0015] Furthermore, the battery cell body includes a core and a tab and a connecting piece disposed at the end of the core. The stepped portion is located on the side of the tab close to the core and is disposed at intervals between the tab and the core. The tab is pressed into the crimping space, and the connecting piece extends out from the side extension gap.

[0016] According to another aspect of the present invention, a battery is provided, comprising the aforementioned cell stop or the aforementioned cell assembly.

[0017] According to the technical solution of the present invention, the battery cell stop frame includes a stop frame body and a split-side stop frame. The stop frame body includes a first mounting part and a stepped part. The stepped part has a stop step. The split-side stop frame includes a second mounting part and a pressing part. The second mounting part is fixedly connected to the first mounting part. The pressing part is provided corresponding to the stepped part. When the second mounting part and the first mounting part are connected, the pressing part cooperates with the step surface of the stop step to form a pressing space. After the second mounting part and the first mounting part are fixedly connected, a side extension gap is formed between the pressing part and the step side of the stop step. The battery cell stop frame adopts a split structure, dividing the battery cell stop frame into at least two parts: one part is the main stop frame body, and the other part is the split-side stop frame. The main stop frame body is provided with a stepped part, and the split-side stop frame is provided with a crimping part. During the process of installing the split-side stop frame to the main stop frame body, a crimping gap is formed between the crimping part and the stepped surface of the stepped part. When the crimping part is pressed down towards the stepped side of the stepped part, it can simultaneously press down on the electrode tab of the battery cell body, forcing the electrode tab to bend. Under the downward pressure of the crimping part, the electrode tab is pressed and fixed in the crimping gap between the crimping part and the stepped surface. The stepped part can be used to limit the biased state after the electrode tab is gathered. The electrode tab is blocked by the stepped part, which can prevent the electrode tab or connecting piece from damaging the stacked core body. The connecting piece on the electrode tab extends out from the side extension gap between the crimping part and the stepped side during the process of the electrode tab being pressed down, without obstructing the connection of the battery cell body. Attached Figure Description

[0018] The accompanying drawings, which form part of this application, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings:

[0019] Figure 1 A three-dimensional structural schematic diagram of the battery cell stop frame according to an embodiment of the present invention is shown;

[0020] Figure 2 An exploded structural diagram of the battery cell stop frame according to an embodiment of the present invention is shown;

[0021] Figure 3 A schematic diagram of the assembly structure of the cell stop frame and the core body according to an embodiment of the present invention is shown;

[0022] Figures 4 to 7 The diagram shows the assembly process of the cell stop bracket and the cell body according to an embodiment of the present invention.

[0023] The above figures include the following reference numerals:

[0024] 1. Main body of the stop frame; 2. Split side stop frame; 3. First mounting part; 4. Stepped part; 5. Second mounting part; 6. Pressing part; 7. Pressing space; 8. Side extension gap; 9. Insertion hole; 10. Fixing post; 11. Rectangular connecting frame; 12. Mounting plate; 13. Fixing connection hole; 14. Connecting plate; 15. Reinforcing plate; 16. Strip hole; 17. Core; 18. Electrode; 19. Connecting piece. Detailed Implementation

[0025] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0026] See also Figures 1 to 7 As shown, according to an embodiment of the present invention, the battery cell stop frame includes a stop frame body 1 and a split-side stop frame 2. The stop frame body 1 includes a first mounting part 3 and a stepped part 4. The stepped part 4 has a stop step. The split-side stop frame 2 includes a second mounting part 5 and a pressing part 6. The second mounting part 5 is fixedly connected to the first mounting part 3. The pressing part 6 is provided corresponding to the stepped part 4. When the second mounting part 5 and the first mounting part 3 are connected, the pressing part 6 cooperates with the step surface of the stop step to form a pressing space 7. After the second mounting part 5 and the first mounting part 3 are fixedly connected, a side extension gap 8 is formed between the pressing part 6 and the step side of the stop step.

[0027] The battery cell stop bracket adopts a split structure, dividing the battery cell stop bracket into at least two parts: a stop bracket main body 1 and a split-side stop bracket 2. The stop bracket main body 1 is provided with a stepped portion 4, and the split-side stop bracket 2 is provided with a crimping portion 6. During the process of installing the split-side stop bracket 2 onto the stop bracket main body 1, a crimping space 7 is formed between the crimping portion 6 and the stepped surface of the stepped portion 4, so that when the crimping portion 6 presses down on the stepped side of the stepped portion 4, it can simultaneously press down the tab 1 of the battery cell body. 8. Pressing tab 18 to bend: Under the downward pressure of crimping part 6, the tab is pressed and fixed in the crimping space 7 between crimping part 6 and step surface. The step part 4 can limit the bias state of the tab 18 after it is gathered. The tab 18 is blocked by the step part 4, which can prevent the tab 18 or connecting piece 19 from damaging the stacked core. The connecting piece 19 on the tab 18 extends out from the side extension gap 8 between crimping part 6 and step side during the process of the tab 18 being pressed down, and will not obstruct the connection of the core body.

[0028] In this embodiment, the split structure of the cell stop bracket allows for pre-bending of the tab 18 during the assembly process, limiting the biased state of the tab 18 after it is brought together, and simultaneously fixing the tab 18 to effectively prevent the tab 18 or connecting piece 19 from damaging the stacked cells. The split structure makes the design of the cell stop bracket more flexible and convenient, allowing for design tailored to the structure of the tab 18, and also providing more effective restraint on the tab 18 during the assembly process.

[0029] In one embodiment, the first mounting part 3 and the second mounting part 5 are inserted and fixed together.

[0030] The first mounting part 3 and the second mounting part 5 are inserted and fixed together. The insertion direction is the same as the pressing direction of the crimping part 6. The insertion between the first mounting part 3 and the second mounting part 5 can guide the pressing of the crimping part 6, so that the crimping part 6 is pressed down at the same time as the first mounting part 3 and the second mounting part 5 are inserted. While completing the insertion and fixing between the first mounting part 3 and the second mounting part 5, the crimping part 6 is also crimped and fixed to the tab 18. The existence of the crimping space 7 between the crimping part 6 and the stepped surface of the stepped part 4 causes the tab 18 to bend during the pressing of the crimping part 6. The bent part is limited within the crimping space 7 under the pressing action of the crimping part 6, which avoids damage to the structure of the tab 18 during the pressing process and ensures the structural stability of the tab 18. While achieving the bending of the tab 18, the connection function of the tab 18 is also guaranteed. In one embodiment, the thickness of the pressing space 7 is equal to or slightly greater than the thickness of the tab 18, so as to ensure that the tab 18 can be pressed and fixed.

[0031] Furthermore, using a plug-in method to fix the first mounting part 3 and the second mounting part 5 can reduce the assembly difficulty between the first mounting part 3 and the second mounting part 5 and improve assembly efficiency.

[0032] In one embodiment, the first mounting part 3 is provided with a plug hole 9, and the second mounting part 5 is provided with a fixing post 10, which is inserted into the plug hole 9.

[0033] In this embodiment, the first mounting part 3 is inserted into the fixing post 10 on the second mounting part 5 via the insertion hole 9. The insertion of the insertion hole 9 and the fixing post 10 effectively guides the insertion of the first mounting part 3 and the second mounting part 5, ensuring the accuracy and reliability of the assembly structure between the first mounting part 3 and the second mounting part 5.

[0034] In one embodiment, a plurality of insertion holes 9 are provided on one side of the first mounting part 3, and a corresponding number of fixing posts 10 are provided at the corresponding positions of the second mounting part 5. The fixing posts 10 and the insertion holes 9 are inserted into each other in a one-to-one correspondence. The insertion and engagement between the fixing posts 10 and the insertion holes 9 may only serve a guiding function and not a connecting function. After the first mounting part 3 and the second mounting part 5 are inserted into place, they can be fixedly connected by a connecting structure. The connecting structure can be a bolted connection structure, a snap-fit ​​structure, a welded structure, etc.

[0035] In one embodiment, a plurality of insertion holes 9 are provided on one side of the first mounting part 3, and the same number of fixing posts 10 are provided at the corresponding positions of the second mounting part 5. The fixing posts 10 correspond one-to-one with the insertion holes 9 and form an interference fit or a snap-fit ​​limit.

[0036] In this embodiment, the engagement between the insertion hole 9 and the fixing post 10 serves not only as a guide but also as a means of secure installation. An interference fit can be formed between the insertion hole 9 and the fixing post 10 to achieve a fixed connection between the first mounting part 3 and the second mounting part 5. A snap-fit ​​structure can also be formed between the insertion hole 9 and the fixing post 10. Specifically, the fixing post 10 is divided into an installation part and a stop part. The installation part is connected to the base of the first installation part 3, and the stop part is located at the end of the installation part away from the base. The diameter of the stop part is larger than the diameter of the insertion hole 9, the diameter of the installation part is smaller than or equal to the diameter of the insertion hole 9, and the length of the installation part is greater than or equal to the depth of the insertion hole 9. The stop part adopts an elastic snap-fit ​​structure or an elastic stop flange. During installation, the stop part first enters the insertion hole 9 and deforms and contracts under the action of the insertion hole 9. After the stop part passes through the insertion hole 9, it expands under the action of elasticity and stops outside the insertion hole 9. At this time, the installation part is located inside the insertion hole 9, forming a clearance fit or transition fit with the insertion hole 9. In this case, under the stopping action of the stop part, the fixing post 10 cannot be dislodged from the insertion hole 9, thereby realizing the insertion and fixing between the first installation part 3 and the second installation part 5.

[0037] In one embodiment, the insertion structure of the fixing post 10 and the insertion hole 9 defines the pressing distance between the pressing part 6 and the step surface of the stop step.

[0038] In this embodiment, the insertion and engagement of the fixing post 10 and the insertion hole 9 can limit the relative installation position of the first mounting part 3 and the second mounting part 5. In this case, the relative position between the pressing part 6 and the stepped part 4 can be designed based on the assembly position of the fixing post 10 and the insertion hole 9, so as to ensure that after the first mounting part 3 and the second mounting part 5 are inserted into place, the thickness of the pressing space 7 between the pressing part 6 and the stepped surface of the stepped part 4 can meet the installation and limiting function of the tab 18.

[0039] In one embodiment, two opposite sides of the stop frame body 1 are respectively provided with stepped portions 4, and each stepped portion 4 is provided with a separate side stop frame 2.

[0040] In this embodiment, a stepped portion 4 and a split-side stop frame 2 that cooperates with the stepped portion 4 are respectively provided on both sides of the stop frame body 1. Different pole ears 18 can be bent and fixed on both sides of the stop frame body 1. Therefore, it can be applied to the case of multiple stacked cores and multiple pole ears, with strong flexibility and adaptability, simple structure and convenient operation.

[0041] In one embodiment, the first mounting part 3 includes a rectangular connecting frame 11, and the two sides of the stepped part 4 are respectively fixedly connected to the rectangular connecting frame 11.

[0042] In this embodiment, the first mounting part 3 uses a rectangular connecting frame 11 as its base structure, which allows the first mounting part 3 to have sufficient thickness to realize the design of the stepped part 4 and meet the fixing requirements of the tab 18. Furthermore, the rectangular connecting frame 11 has a simple structure, is easy to manufacture, has good structural strength, and is more convenient to assemble with the second mounting part 5. The rectangular connecting frame 11 also makes it easier to create insertion holes 9 on the frame, reducing the difficulty of setting the insertion holes 9 on the first mounting part 3. The hollow structure of the rectangular connecting frame 11 allows for the design of the base structure of the first mounting part 3 with less material and lower cost.

[0043] In one embodiment, a mounting plate 12 is provided at the frame opening on one side of the rectangular connecting frame 11, and a fixing connection hole 13 is provided on the mounting plate 12.

[0044] In this embodiment, the rectangular connecting frame 11 includes four side plates connected end to end. The frame structure formed by the four side plates has openings on both sides. A mounting plate 12 is provided on the side of the rectangular connecting frame 11 near the battery cell body. The mounting plate 12 is fixedly connected to one side opening of the rectangular connecting frame 11 and is fixedly connected to the four side plates. The fixed connection method can be adhesive, welding, or bolt connection, etc. The mounting plate 12 is provided with a fixing connection hole 13, which can be a threaded hole or a connection hole, to facilitate the connection and fixation of the first mounting part 3 on the battery cell body.

[0045] In one embodiment, the mounting plate 12 may be provided with a plurality of fixed connection holes 13, which are arranged side by side, with each row including a plurality of fixed connection holes 13, thereby forming more connection and fixing structures to achieve a stable and reliable connection between the first mounting part 3 and the battery cell body.

[0046] In one embodiment, a reinforcing plate 15 is provided inside the rectangular connecting frame 11.

[0047] In this embodiment, since the rectangular connecting frame 11 is a hollow structure, its structural strength may be insufficient. To solve this problem, a reinforcing plate 15 can be provided inside the rectangular connecting frame 11. The reinforcing plate 15 is connected between two opposite side plates, providing support and fixation for the two opposite side plates. In one embodiment, the reinforcing plate 15 can also be provided between two adjacent side plates and fixedly connected to the two adjacent side plates by welding to form a triangular connection structure, ensuring the overall stability and reliability of the rectangular connecting frame 11.

[0048] In one embodiment, the second mounting part 5 includes two rectangular connecting frames 11 arranged opposite to each other and a connecting plate 14 connected between the two rectangular connecting frames 11, and the pressing part 6 includes a pressing plate, which is fixedly connected to the connecting plate 14.

[0049] In this embodiment, the second mounting part 5 adopts a structure in which a rectangular connecting frame 11 and a connecting plate 14 are connected, which facilitates the installation of the fixing post 10 and the assembly and fixation with the rectangular connecting frame 11 of the first mounting part 3, and also simplifies the structure of the second mounting part 5. The connecting plate 14 is connected between the two rectangular connecting frames 11 on both sides and serves as the mounting base for the pressing part 6, for the installation and fixation of the pressing part 6. Since the connecting plate 14 is a flat plate structure, it has a large installation area, which facilitates the design of the pressing part 6. The position of the pressing part 6 can be reasonably set according to the setting position of the stepped part 4 to meet the position setting requirements of the pressing part 6 and facilitate the formation of an accurate and reliable mating relationship with the stepped part 4.

[0050] The rectangular connecting frame 11 and the connecting plate 14 can be integrally formed, which can reduce the difficulty of connecting the rectangular connecting frame 11 and the connecting plate 14, and improve the connection strength between the rectangular connecting frame 11 and the connecting plate 14. During processing, a long strip plate structure can be used, with the rectangular connecting frame 11 formed by rolling on both sides and the connecting plate 14 formed in the middle.

[0051] When the main body 1 of the stop frame and the split side stop frame 2 are assembled, their outline structure is basically the same as that of the battery cell body. Therefore, the assembled structure has good appearance consistency, which facilitates the installation and setting of the battery assembly.

[0052] In one embodiment, the crimping portion 6 and / or the stepped portion 4 are provided with strip-shaped holes 16. In this embodiment, the crimping portion 6 and the stepped portion 4 are each provided with strip-shaped holes 16, and there are multiple strip-shaped holes 16, which are spaced apart and extend along the length direction of the crimping portion 6 and the stepped portion 4. The design of the strip-shaped holes 16 can reduce the overall structural mass of the battery cell stop frame without affecting the structural strength of the stop frame body 1 and the split-side stop frame 2, thereby reducing the mass of the battery cell assembly.

[0053] See also Figures 1 to 7 As shown, according to an embodiment of the present invention, the battery cell assembly includes a battery cell stop frame and a battery cell body. The battery cell stop frame is the aforementioned battery cell stop frame, and the battery cell stop frame is installed on two opposite sides of the battery cell body.

[0054] In one embodiment, the battery cell body includes a core 17 and a tab 18 and a connecting piece 19 disposed at the end of the core 17. The stepped portion 4 is located on the side of the tab 18 close to the core 17 and is spaced between the tab 18 and the core 17. The tab 18 is pressed into the crimping space 7, and the connecting piece 19 extends out from the side extension gap 8.

[0055] See also Figures 4 to 7As shown, during the installation of the battery cell stop bracket, the connection state of the electrode tab 18 and the connecting piece 19 of the core 17 is first adjusted so that the electrode tab 18 is tilted to the sides and the connecting piece 19 forms an L-shaped structure.

[0056] Next, the stop frame body 1 is installed, such that the stepped portion 4 of the stop frame body 1 is located inside the extended electrode lugs 18 and connecting pieces 19, forming a gap stop between the extended electrode lugs 18 and connecting pieces 19 and the core body 17. This limits the biased state of the extended electrode lugs 18 after they are gathered together, while preventing the extended electrode lugs 18 or connecting pieces 19 from damaging the electrode plates of the core body 17. The stepped portion 4 of the stop frame body 1 is located inside the extended electrode lugs 18 and connecting pieces 19, and the extended electrode lugs 18 and connecting pieces 19 are both located outside the stepped surface of the stepped portion 4, forming a stop and isolation through the stepped surface. The first mounting portion 3 of the stop frame body 1 is installed and fixed on the core body 17.

[0057] Then, the split-side stop frames 2 are installed from both sides of the stop frame body 1, so that the fixing posts 10 on the split-side stop frames 2 are aligned with the insertion holes 9 on the stop frame body 1. The split-side stop frames 2 are installed from the outside of the tabs 18 and connecting pieces 19, and are inserted along the insertion holes 9. The tabs 18 and connecting pieces 19 are located between the crimping part 6 of the split-side stop frame 2 and the stepped part 4 of the stop frame body 1. During the insertion process of the split-side stop frames 2, the crimping part 6... The electrode lug 18 is pressed down along the stepped surface of the stepped portion 4, forcing the electrode lug 18 to bend and press and fix it on the stepped surface. Under the pressing action of the pressing portion 6, the electrode lug 18 is flattened and fixed in the pressing space 7 between the pressing portion 6 and the stepped surface. Under the pressing action of the pressing portion 6, the connecting piece 19 is stopped by the side of the stepped portion 4 and extends out from the side extension gap 8 between the pressing portion 6 and the side of the stepped surface, which facilitates the connection of the electrode lug 18 with other structures.

[0058] After the split-side stop bracket 2 is installed in place, the battery cell stop bracket assembly is completed. The split-side stop bracket 2, together with the stepped surface of the stop bracket body 1, limits the electrode tab 18 and connecting piece 19 of the battery cell body.

[0059] According to an embodiment of the present invention, the battery includes the cell stop frame or the cell assembly described above.

[0060] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0061] It should be noted that the terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in sequences other than those illustrated or described herein.

[0062] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A battery cell stop bracket, characterized in that, The system includes a main body (1) of a stop frame and a split-side stop frame (2). The main body (1) of the stop frame includes a first mounting part (3) and a stepped part (4). The stepped part (4) has a stop step. The split-side stop frame (2) includes a second mounting part (5) and a pressing part (6). The second mounting part (5) is fixedly connected to the first mounting part (3). The pressing part (6) is provided corresponding to the stepped part (4). When the second mounting part (5) and the first mounting part (3) are connected, the pressing part (6) and the step surface of the stop step cooperate to form a pressing space (7). After the second mounting part (5) and the first mounting part (3) are fixedly connected, a side extension gap (8) is formed between the pressing part (6) and the step side of the stop step. The first mounting part (3) includes a rectangular connecting frame (11), and the two sides of the stepped part (4) are respectively fixedly connected to the rectangular connecting frame (11); The second mounting part (5) includes two rectangular connecting frames (11) arranged opposite to each other and a connecting plate (14) connected between the two rectangular connecting frames (11). The pressing part (6) includes a pressing plate, which is fixedly connected to the connecting plate (14).

2. The cell stop bracket according to claim 1, characterized in that, The first mounting part (3) and the second mounting part (5) are connected and fixed together.

3. The cell stop bracket according to claim 2, characterized in that, The first mounting part (3) is provided with a plug hole (9), and the second mounting part (5) is provided with a fixing post (10), which is inserted into the plug hole (9).

4. The cell stop bracket according to claim 3, characterized in that, The insertion structure of the fixed post (10) and the insertion hole (9) defines the pressing distance between the pressing part (6) and the step surface of the stop step.

5. The cell stop frame according to any one of claims 1 to 4, characterized in that, The two opposite sides of the stop frame body (1) are respectively provided with the stepped part (4), and each stepped part (4) is provided with a split side stop frame (2).

6. The cell stop frame according to claim 1, characterized in that, An installation plate (12) is provided at the frame opening on one side of the rectangular connecting frame (11), and a fixing connection hole (13) is provided on the installation plate (12); and / or, a reinforcing plate (15) is provided inside the rectangular connecting frame (11).

7. The cell stop frame according to any one of claims 1 to 6, characterized in that, The crimping portion (6) and / or the stepped portion (4) are provided with strip-shaped holes (16).

8. A battery cell assembly, comprising a battery cell stop frame and a battery cell body, characterized in that, The cell stop bracket is the cell stop bracket according to any one of claims 1 to 7, and the cell stop bracket is installed on two opposite sides of the cell body.

9. The cell assembly according to claim 8, characterized in that, The battery cell body includes a core (17) and a tab (18) and a connecting piece (19) disposed at the end of the core (17). The stepped portion (4) is located on the side of the tab (18) close to the core (17) and is disposed at intervals between the tab (18) and the core (17). The tab (18) is pressed into the crimping space (7), and the connecting piece (19) extends out from the side extension gap (8).

10. A battery, characterized in that, Includes the cell stop frame according to any one of claims 1 to 7 or the cell assembly according to claim 8 or 9.

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