Retention device for battery piece passivation

Abstract

The utility model relates to the technical field of solar cells, in particular to a retention device for cell passivation, which comprises a frame, a first cover plate and a second cover plate, a first side wall parallel to the first cover plate and a second side wall parallel to the second cover plate are arranged in the frame, and the first cover plate and the second cover plate are arranged on the first side wall and the second side wall respectively. The first cover plate and the second cover plate are both located in the frame, the first cover plate is perpendicular to the second cover plate, and the first side wall, the second side wall, the first cover plate and the second cover plate form a containing cavity used for containing battery pieces. The stacked battery pieces are placed in the containing cavity, the lowest battery piece is located on the first side wall of the frame, one side face, which does not need passivation, of the lowest battery piece abuts against the second side wall, the first adjusting mechanism drives the first cover plate to move towards the first side wall, and the second adjusting mechanism drives the second cover plate to move towards the second side wall. And the second adjusting mechanism drives the second cover plate to move towards the direction of the second side wall so as to fix the battery piece.

Description

Technical Field

[0001] The utility model relates to the technical field of solar cells, in particular to a fixing device for passivation of a solar cell. Background Art

[0002] In recent years, as the size of cells continues to increase, it has become the mainstream process to reduce the power loss of components by cutting cells into halves or multiple pieces to make components. However, after the cell is cut, a new edge surface will produce a large number of dangling bonds to form a composite center, which will lead to a significant decrease in battery efficiency. As the battery power increases, the loss caused by cutting damage becomes more and more obvious. At present, it is measured that the efficiency of TOPCon cells (Tunnel Oxide Passivated Contact cells) by laser cutting reaches 0.2% / cutting loss. Cutting damage seriously affects the efficiency of cells and battery components. The current mainstream passivation technology is to produce a passivation film of Al2O3 or SiO2 on the cut edge of the cell to passivate the cut surface.

[0003] The existing fixing device for passivating battery cells includes a carrier plate, on which a cover plate parallel to the carrier plate is arranged, and the cover plate and the carrier plate are fixedly connected by a plurality of bolts and nuts, thereby clamping and fixing the stacked battery cells.

[0004] However, this method does not shield the sides (sides) of the cell that do not require coating, and the side edges of the cell are prone to plating, which affects the efficiency of the cell. Utility Model Content

[0005] (I) The problem to be solved by the present invention is: how to prevent the battery cell from being circumvented by plating.

[0006] (II) Technical solution

[0007] The utility model provides a battery cell passivation fixing device, comprising a frame, a first cover plate and a second cover plate;

[0008] The frame has a first side wall parallel to the first cover plate and a second side wall parallel to the second cover plate, the first cover plate and the second cover plate are both located in the frame, and the first cover plate is perpendicular to the second cover plate;

[0009] The first side wall, the second side wall, the first cover plate and the second cover plate form a receiving cavity for receiving a battery cell;

[0010] The frame is provided with a first adjustment mechanism and a second adjustment mechanism, the first adjustment mechanism is used to adjust the distance from the first cover plate to the first side wall, and the second adjustment mechanism is used to adjust the distance from the second cover plate to the second side wall.

[0011] According to an embodiment of the utility model, the first adjustment mechanism includes a first elastic telescopic component, the first elastic telescopic component includes a first spring, one end of the first spring is connected to the top of the frame, and the other end of the first spring is connected to the first cover plate.

[0012] According to an embodiment of the utility model, the first elastic telescopic component includes a first limiting ring and a second limiting ring;

[0013] The second limiting ring is fixedly connected to the first cover plate, the first limiting ring is sleeved on the first spring, and the second limiting ring is sleeved on the first limiting ring.

[0014] According to an embodiment of the utility model, the first adjustment mechanism also includes a first adjustment screw and a first bearing, the first adjustment screw is threadedly connected to the frame, and the first adjustment screw is movably connected to the first elastic telescopic component through the first bearing.

[0015] According to an embodiment of the utility model, two first elastic telescopic components are provided, and the first adjustment mechanism includes a first limiting column, the first limiting column passes through the frame and is fixedly connected to one of the first elastic telescopic components, and the first bearing is connected to the other first elastic telescopic component.

[0016] According to one embodiment of the utility model, the second adjusting mechanism has the same structure as the first adjusting mechanism, one end of the second adjusting mechanism is connected to the second cover plate, and the other end is connected to the frame, and the length direction of the second adjusting mechanism is perpendicular to the length direction of the first adjusting mechanism.

[0017] According to an embodiment of the present utility model, the second cover plate includes a first plate body, a second plate body and a fixing member;

[0018] A clearance groove is formed on one side of the first plate body close to the second side wall, and the second plate body is slidably connected in the clearance groove, and the sliding direction of the second plate body is perpendicular to the first side wall;

[0019] The fixing member is used to fix the second plate.

[0020] According to one embodiment of the utility model, a limiting groove is provided on the side wall of the give way groove, a limiting rod is fixedly connected to one side of the second plate body, the limiting rod is slidably connected in the limiting groove, a screw hole is provided on the side of the limiting groove away from the give way groove, the fixing piece is a bolt, and the bolt is screwed in the screw hole.

[0021] According to an embodiment of the utility model, a mounting groove is opened on one side of the frame, a baffle is slidably connected in the mounting groove, and the first cover plate and the second cover plate are both perpendicular to the baffle plate.

[0022] According to an embodiment of the present invention, the length and width of the first cover plate are not less than the length and width of the battery cell.

[0023] Beneficial effects of the utility model:

[0024] The stacked battery cells are placed in the accommodating cavity, with the bottom battery cell located on the first side wall of the frame, and one of the side surfaces that does not need passivation abuts against the second side wall. The first adjustment mechanism drives the first cover plate to move toward the first side wall to clamp the stacked battery cells in place, thereby reducing the gap between two adjacent battery cells and making it less likely that the battery cells will be plated around the sides. The second adjustment mechanism then drives the second cover plate to move toward the second side wall to clamp the edge of the battery cell in place, thereby preventing the battery cells from being plated around their sides and less likely to affect the efficiency of the battery cells. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0026] Figure 1 A three-dimensional diagram provided for an embodiment of the utility model;

[0027] Figure 2 A front view provided for an embodiment of the utility model;

[0028] Figure 3 A three-dimensional exploded view of a first adjustment mechanism provided in an embodiment of the utility model;

[0029] Figure 4 A three-dimensional exploded view of the second cover plate provided in an embodiment of the utility model.

[0030] Icons: 1. Frame; 101. First side wall; 102. Second side wall; 2. First cover plate; 3. Second cover plate; 301. First plate body; 302. Make way groove; 303. Second plate body; 304. Limit rod; 305. Limit groove; 306. Bolt; 4. First adjusting mechanism; 401. First spring; 402. First adjusting screw; 403. First bearing; 404. First limit ring; 405. Second limit ring; 406. First limit column; 5. Second adjusting mechanism; 6. Baffle. DETAILED DESCRIPTION

[0031] The technical solution of the utility model will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0032] like Figure 1-Figure 4 As shown, an embodiment of the utility model provides a battery cell passivation retaining device, comprising a frame 1, a first cover plate 2 and a second cover plate 3;

[0033] The frame 1 has a first side wall 101 parallel to the first cover plate 2 and a second side wall 102 parallel to the second cover plate 3. The first cover plate 2 and the second cover plate 3 are both located in the frame 1, and the first cover plate 2 is perpendicular to the second cover plate 3.

[0034] The first side wall 101, the second side wall 102, the first cover plate 2 and the second cover plate 3 form a receiving cavity for receiving the battery cell;

[0035] The frame 1 is provided with a first adjusting mechanism 4 and a second adjusting mechanism 5 . The first adjusting mechanism 4 is used to adjust the distance from the first cover plate 2 to the first side wall 101 , and the second adjusting mechanism 5 is used to adjust the distance from the second cover plate 3 to the second side wall 102 .

[0036] Specifically, the stacked battery cells are placed in the accommodating cavity, with the bottom battery cell located on the first side wall 101 in the frame 1, and one of the side surfaces of the battery cell that does not need to be passivated abuts against the second side wall 102. The first adjustment mechanism 4 drives the first cover plate 2 to move toward the first side wall 101 to clamp the stacked battery cells in place, so that the gap between two adjacent battery cells is reduced. At this time, the first cover plate 2 covers the top battery cell, and the side plate of the battery cell is not prone to plating. The second adjustment mechanism 5 then drives the second cover plate 3 to move toward the second side wall 102 to clamp the edge (side) of the battery cell in place. At this time, the second cover plate 3 can cover the side of the battery cell that does not need to be coated, thereby preventing the side of the battery cell from plating, and thus not easily affecting the efficiency of the battery cell.

[0037] The cell side panel refers to the surface where two cells are in contact, and the cell side refers to the side of the cell.

[0038] Furthermore, since the first adjustment mechanism 4 can adjust the distance from the first cover plate 2 to the first side wall 101 and the second adjustment mechanism 5 can adjust the distance from the second cover plate 3 to the second side wall 102 respectively, it is possible to fix different numbers of stacked battery cells.

[0039] Due to the designed second adjustment mechanism 5, the distance between the second cover plate 3 and the second side wall 102 can be changed, so that battery cells of different sizes can be fixed in place.

[0040] In the traditional method of fixing the carrier plate and the cover plate with bolts and nuts, it is not easy for the staff to control the distance between the carrier plate and the cover plate when tightening the nuts. If the distance is too close, the battery cells may be easily crushed. If the distance is too far, the clamping and fixing effect is not good, and the stacked battery cells are prone to misalignment, which affects the passivation effect of the cut edges of the battery cells.

[0041] According to one embodiment of the utility model, Figure 2 and Figure 3 As shown, the first adjustment mechanism 4 includes a first elastic telescopic component, and the first elastic telescopic component includes a first spring 401 . One end of the first spring 401 is connected to the top of the frame 1 , and the other end thereof is connected to the first cover plate 2 .

[0042] By setting the first spring 401, the first cover plate 2 is manually lifted. At this time, the first spring 401 is in a compressed state. The stacked battery cells are placed between the first side wall 101 and the first cover plate 2. The first cover plate 2 is loosened, and the first spring 401 releases elastic potential energy, driving the first cover plate 2 to move toward the first side wall 101, thereby clamping the stacked battery cells. Compared with the traditional bolt and nut fixing method, the first spring 401 does not need to remove nuts one by one to adjust the spacing due to the different number of stacked battery cells. The fixing method is more time-saving and labor-saving, and because it is not rigidly fixed, the buffering effect is better. The stacked battery cells are not easily damaged and can also play a good fixing effect. Of course, a layer of rubber pad can be bonded to the side of the first cover plate 2 close to the first side wall 101 to better protect the battery cells.

[0043] According to an embodiment of the present utility model, the first elastic telescopic assembly includes a first limiting ring 404 and a second limiting ring 405;

[0044] The second limiting ring 405 is fixedly connected to the first cover plate 2 . The first limiting ring 404 is sleeved on the first spring 401 . The second limiting ring 405 is sleeved on the first limiting ring 404 .

[0045] By providing the first limiting ring 404 and the second limiting ring 405, the extension and contraction direction of the first spring 401 can be limited, so that the first cover plate 2 will not shake in a direction perpendicular to the length direction of the first spring 401, thereby making the first cover plate 2 move more smoothly and the stacked battery cells more accurately fixed, which is convenient for the subsequent passivation of the cut edges of the battery cells.

[0046] According to an embodiment of the utility model, the first adjustment mechanism 4 further includes a first adjustment screw 402 and a first bearing 403. The first adjustment screw 402 is screwed to the frame 1, and the first adjustment screw 402 is movably connected to the first elastic telescopic component through the first bearing 403. The length direction of the first adjustment screw 402 is the length direction of the first adjustment mechanism 4.

[0047] When the number of stacked battery cells is changed from 100 to 1000, due to the increase in the number and the large difference in the number, the telescopic stroke of the first spring 401 remains unchanged. Therefore, when the number of battery cells is 1000, the elastic force of the first spring 401 on the battery cell is larger, and the degree of squeezing on the battery cell is stronger, so it is easy to cause damage to the battery cell. In this embodiment, by providing the first adjusting screw 402, the distance between the first cover plate 2 and the first side wall 101 in the initial state can be changed (the distance is smaller than the height of the stack of multiple battery cells), and then when it is necessary to fix the 1000 stacked battery cells, the first adjusting screw 402 is used. The distance between the first side wall 101 and the first cover plate 2 is increased, so the first spring 401 can be accommodated without being shortened to a smaller size. By twisting the first adjusting screw 402, the first adjusting screw 402 is moved closer to or farther away from the first side wall 101 (when it is close to the first side wall 101, it accommodates a small number of stacked battery cells, and when it is away from the first side wall 101, it accommodates a large number of stacked battery cells). As a result, when the first spring 401 restores its elastic potential energy to drive the first cover plate 2 to move toward the first side wall 101 to fix the battery cells, it will not cause excessive pressure on the battery cells, resulting in damage to the battery cells, and the practicality is stronger. The provision of the first bearing 403 can prevent the first spring 401 from rotating with the first adjusting screw 402, and thus will not affect the first spring 401, thereby increasing the service life of the first spring 401.

[0048] Furthermore, the first adjustment mechanism 4 also includes a pull rod, which is fixedly connected to the first cover plate 2. The pull rod passes through the frame 1, and a handle is installed at the end of the pull rod away from the first cover plate 2. The pull rod is pulled by the handle to move the first cover plate 2 away from the first side wall 101, making it more convenient to place a large number of stacked battery cells into the accommodating cavity.

[0049] According to an embodiment of the utility model, two first elastic telescopic components are provided, and the first adjustment mechanism 4 includes a first limit column 406, the first limit column 406 passes through the frame 1 and is fixedly connected to one of the first elastic telescopic components, and the first bearing 403 is connected to the other first elastic telescopic component. The outer ring of the first bearing 403 is fixedly connected to the first limit ring 404 in one of the first elastic telescopic components, and the inner ring of the first bearing 403 is fixedly connected to the first adjustment screw 402. The first limit column 406 is fixedly connected to the first limit ring 404 in the other first elastic telescopic component.

[0050] The provision of the first limiting column 406 can make the first cover plate 2 move more smoothly and play a guiding role.

[0051] Of course, in this embodiment, the first adjustment mechanism 4 can also be in other forms, for example, the first adjustment mechanism 4 includes a connecting rod, the connecting rod passes through the top of the frame 1 and is fixedly connected to the first cover plate 2, a stopper is fixedly connected to the end of the connecting rod away from the first cover plate 2, a third spring is arranged between the stopper and the frame 1, the third spring is sleeved on the connecting rod, the stopper is used to prevent the third spring from popping out of the connecting rod, the stopper and the connecting rod are screwed, and the third spring can be replaced by unscrewing the stopper from the connecting rod, and replaced with a third spring of different specifications, so that the first adjustment mechanism 4 is suitable for fixing different numbers of stacked battery cells. Its purpose does not deviate from the design concept of the utility model, and therefore, it should belong to the protection scope of the utility model.

[0052] According to an embodiment of the utility model, the second adjustment mechanism 5 has the same structure as the first adjustment mechanism 4, one end of the second adjustment mechanism 5 is connected to the second cover plate 3, and the other end is connected to the frame 1, and the length direction of the second adjustment mechanism 5 is perpendicular to the length direction of the first adjustment mechanism 4. The second adjustment mechanism 5 includes a second adjustment screw and a third limiting ring, and the second adjustment screw is screwed to the frame 1;

[0053] A second spring is arranged inside the third limiting ring, and a fourth limiting ring is sleeved on the outer side of the third limiting ring. Both ends of the second spring are respectively connected to the third limiting ring and the fourth limiting ring. One end of the third limiting ring is connected to the second adjusting screw through a second bearing, and one end of the fourth limiting ring away from the second adjusting screw is fixedly connected to the second cover plate 3. The distance between the second cover plate 3 and the second side wall 102 can be adjusted by screwing the second adjusting screw.

[0054] The length direction of the second adjusting screw is the length direction of the second adjusting mechanism 5 .

[0055] According to one embodiment of the utility model, Figure 4 As shown, the second cover plate 3 includes a first plate body 301, a second plate body 303 and a fixing member;

[0056] A clearance groove 302 is formed on one side of the first plate 301 close to the second side wall 102, and the second plate 303 is slidably connected in the clearance groove 302, and the sliding direction of the second plate 303 is perpendicular to the first side wall 101;

[0057] The fixing member is used to fix the second plate 303 .

[0058] By setting the second plate 303, the second cover plate 3 can be adjusted. When the stacking height of the battery cells is greater than the height of the first plate 301, the position of the second plate 303 relative to the first plate 301 is adjusted to block the side walls of the battery cells, thereby effectively preventing the plating from wrapping around during the Sun Hua process.

[0059] According to an embodiment of the utility model, a limiting groove 305 is provided on the side wall of the clearance groove 302, a limiting rod 304 is fixedly connected to the side of the second plate body 303 away from the second side wall 102, the limiting rod 304 is slidably connected in the limiting groove 305, a screw hole is provided on the side of the limiting groove 305 away from the clearance groove 302, and the fixing member is a bolt 306, and the bolt 306 is screwed in the screw hole. Specifically, the adjustment method is: after the second plate body 303 is pulled out and the height is appropriate, by screwing the two bolts 306, the limiting rod 304 is tightly pressed against the limiting groove 305 for fixing.

[0060] According to an embodiment of the utility model, a mounting groove is opened on one side of the frame 1 , a baffle 6 is slidably connected in the mounting groove, and the first cover plate 2 and the second cover plate 3 are both perpendicular to the baffle 6 .

[0061] When it is necessary to perform passivation coating on the cut edge of one side of the battery cell, the baffle 6 is inserted into the installation groove to block the other side edge of the baffle 6. When it is necessary to perform coating on the cut edges on both sides of the battery cell, the baffle 6 can be installed first so that the three sides of the multiple stacked battery cells are aligned and limited, and then the baffle 6 is taken out and the clamping device that clamps the battery cell is loaded into the boat for passivation coating.

[0062] The length and width of the first cover plate 2 are not less than the length and width of the battery cell.

[0063] It should be noted that the length direction of the first cover plate 2, the length direction of the frame 1 and the length direction of the battery cell are all the same, the width direction of the first cover plate 2, the width direction of the battery cell and the length direction of the second cover plate 3 are all the same, and the height (thickness) direction of the battery cell is the same as the height direction of the second cover plate 3. Preferably, when the clamping device is used to fix only one size of battery cell, the length and width of the first cover plate 2 are consistent with the length and width of the battery cell, and the length of the second cover plate 3 is consistent with the width of the battery cell, so that the area of ​​the battery cell that does not need to be coated can be shielded without affecting (not shielding) the coating of the passivation coating area, thereby achieving a better coating effect.

[0064] The frame 1 is symmetrically provided with handles. Preferably, the handles are symmetrically provided on the top of the frame 1, so that the clamping device can be more conveniently taken and placed.

[0065] Directions:

[0066] Step 1: Place the battery strips with the front side facing up and stack them up. The number of strips can be controlled between 100 and 1000.

[0067] Step 2: Place the baffle 6 into the mounting groove, and place the aligned battery strips into the accommodating cavity;

[0068] Step 3: The second adjustment mechanism 5 drives the second cover plate 3 to clamp the two ends of the battery cell between the second cover plate 3 and the second side wall 102 to block the side of the battery cell to prevent the side from being plated;

[0069] The first adjustment mechanism 4 drives the first cover plate 2 to press the side pieces of the battery cell between the first cover plate 2 and the first side wall 101, thereby reducing the gap between the battery cells and preventing the side pieces from being plated around.

[0070] Step 4: If the passivation film needs to be grown on both sides of the battery strip, the baffle 6 of step 2 is removed. If the passivation film is grown on only one side, only the side that needs to be coated needs to be exposed.

[0071] Finally, the holding device with the completed cell loading is placed in the boat and then sent to the ALD passivation equipment for the passivation process to complete the growth of the passivation film on the cut side.

[0072] In the description of the present invention, it should be noted that the terms "upper" and "lower" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0073] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be a connection between the two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. In addition, in the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0074] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A battery cell passivation retention device, characterized in that: It comprises a frame (1), a first cover plate (2) and a second cover plate (3); The frame (1) has a first side wall (101) parallel to the first cover plate (2) and a second side wall (102) parallel to the second cover plate (3); the first cover plate (2) and the second cover plate (3) are both located in the frame (1), and the first cover plate (2) is perpendicular to the second cover plate (3); The first side wall (101), the second side wall (102), the first cover plate (2) and the second cover plate (3) form a receiving cavity for receiving a battery cell; The frame (1) is provided with a first adjustment mechanism (4) and a second adjustment mechanism (5), wherein the first adjustment mechanism (4) is used to adjust the distance between the first cover plate (2) and the first side wall (101), and the second adjustment mechanism (5) is used to adjust the distance between the second cover plate (3) and the second side wall (102).

2. A battery cell passivation retention device according to claim 1, characterized in that: The first adjustment mechanism (4) comprises a first elastic telescopic component, the first elastic telescopic component comprises a first spring (401), one end of the first spring (401) is connected to the top of the frame (1), and the other end of the first spring (401) is connected to the first cover plate (2).

3. A battery cell passivation retention device according to claim 2, characterized in that: The first elastic telescopic component comprises a first limiting ring (404) and a second limiting ring (405); The second limiting ring (405) is fixedly connected to the first cover plate (2), the first limiting ring (404) is sleeved on the first spring (401), and the second limiting ring (405) is sleeved on the first limiting ring (404).

4. A battery cell passivation retention device according to claim 3, characterized in that: The first adjustment mechanism (4) further comprises a first adjustment screw (402) and a first bearing (403); the first adjustment screw (402) is threadedly connected to the frame (1); and the first adjustment screw (402) is movably connected to the first elastic telescopic component via the first bearing (403).

5. A battery cell passivation retention device according to claim 4, characterized in that: Two of the first elastic telescopic components are provided, and the first adjustment mechanism (4) comprises a first limiting column (406), the first limiting column (406) passes through the frame (1) and is fixedly connected to one of the first elastic telescopic components, and the first bearing (403) is connected to the other first elastic telescopic component.

6. A battery cell passivation retention device according to claim 1, characterized in that: The second adjusting mechanism (5) has the same structure as the first adjusting mechanism (4); one end of the second adjusting mechanism (5) is connected to the second cover plate (3), and the other end is connected to the frame (1); and the length direction of the second adjusting mechanism (5) is perpendicular to the length direction of the first adjusting mechanism (4).

7. A battery cell passivation retention device according to claim 1, characterized in that: The second cover plate (3) comprises a first plate body (301), a second plate body (303) and a fixing member; A clearance groove (302) is provided on one side of the first plate body (301) close to the second side wall (102), and the second plate body (303) is slidably connected in the clearance groove (302), and the sliding direction of the second plate body (303) is perpendicular to the first side wall (101); The fixing member is used to fix the second plate (303).

8. A battery cell passivation retention device according to claim 7, characterized in that: A limiting groove (305) is provided on the side wall of the giving way groove (302); a limiting rod (304) is fixedly connected to one side of the second plate body (303); the limiting rod (304) is slidably connected in the limiting groove (305); a screw hole is provided on the side of the limiting groove (305) away from the giving way groove (302); the fixing member is a bolt (306) which is screwed into the screw hole.

9. A battery cell passivation retention device according to claim 1, characterized in that: A mounting groove is provided on one side of the frame (1), a baffle (6) is slidably connected in the mounting groove, and the first cover plate (2) and the second cover plate (3) are both perpendicular to the baffle plate (6).

10. The battery cell passivation retaining device according to claim 1, characterized in that: The length and width of the first cover plate (2) are not less than the length and width of the battery cell.

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