Battery cell pressurizing clamp

Abstract

The utility model relates to a battery cell pressurizing clamp, which comprises a bottom plate, the top plate is arranged on the bottom plate and covers the battery cell accommodating groove; the wedge-shaped driving pressing block and the wedge-shaped follow-up pressing block are oppositely stacked end to end; the wedge-shaped driving pressing block, the wedge-shaped follow-up pressing block and the battery cell are sequentially placed in the battery cell accommodating groove from top to bottom; the pressing push rod penetrates through the push rod through hole, one end of the pressing push rod extends into the battery cell accommodating groove, one end of the pressing push rod abuts against the second end of the wedge-shaped driving pressing block, and the pressing push rod can push the wedge-shaped driving pressing block to move in the direction away from the baffle. According to the utility model, the two wedge-shaped pressing blocks are adopted to apply pressure to the battery cell, so that the battery cell can be integrally pressurized by a single acting force, the pressurization is more uniform, and the problem of non-uniform pressurization existing in multi-point pressurization can be avoided.

Description

Technical Field

[0001] The utility model belongs to the technical field of battery processing, and in particular relates to a pressurizing clamp used in the production process of lithium-ion solid-state batteries. Background Art

[0002] Lithium-ion solid-state battery cells are often transferred and transported using fixtures during production, sample delivery and inspection. The purpose of the fixture is to apply constant pressure to the battery and fix the cell to prevent it from shifting or falling. The existing cell fixture structure is relatively simple, and the cell is locked and fixed by multiple sets of screws. This multi-point screw fixing method makes it difficult to ensure that the locking force at each position is the same, which will cause uneven force at different positions of the cell. Utility Model Content

[0003] The utility model aims to provide a battery core pressurizing clamp which can evenly pressurize and make the battery core evenly stressed.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] A battery cell pressurizing fixture comprises: a bottom plate provided with a battery cell accommodating groove; a top plate arranged on the bottom plate and covering the battery cell accommodating groove; a wedge-shaped active pressure block and a wedge-shaped follower pressure block stacked end to end, the wedge-shaped active pressure block, the wedge-shaped follower pressure block and the battery cell are placed in the battery cell accommodating groove in sequence from top to bottom; a pressure push rod passing through the push rod through hole and extending one end into the battery cell accommodating groove, one end of the pressure push rod abutting against the second end of the wedge-shaped active pressure block, and can push the wedge-shaped active pressure block to move toward the rear side wall of the battery cell accommodating groove.

[0006] As the battery cell pressurizing clamp mentioned above, optionally, the vertical cross-section shape of the wedge-shaped active pressure block and the wedge-shaped follower pressure block is a right triangle, the inclined surface of the wedge-shaped follower pressure block faces upward, the inclined surface of the wedge-shaped active pressure block and the inclined surface of the wedge-shaped follower pressure block are opposite, and the wedge-shaped active pressure block is in contact with the top plate; the first end of the wedge-shaped follower pressure block and the second end of the wedge-shaped active pressure block are located on the same side as the battery cell ear, and the second end of the wedge-shaped follower pressure block can be against the rear side wall of the battery cell receiving groove.

[0007] As for the battery cell pressurizing fixture mentioned above, optionally, the length of the wedge-shaped follower pressure block is longer than the length of the wedge-shaped active pressure block.

[0008] As for the battery cell pressurizing fixture mentioned above, optionally, the baffle is detachably arranged on the bottom plate.

[0009] The battery cell pressurizing fixture as mentioned above may optionally further include a baffle plate arranged on the bottom plate, the baffle plate is opposite to the protruding end of the battery cell's pole lug, and the baffle plate is provided with a pole lug outlet hole and a push rod through hole.

[0010] As for the battery cell pressurizing fixture mentioned above, optionally, the bottom plate is provided with a baffle fixing groove, and the baffle can be inserted into the baffle fixing groove and fixed to the bottom plate.

[0011] As for the battery cell pressurizing fixture mentioned above, optionally, the top plate is provided with a groove matching with the baffle plate, and the top of the baffle plate is inserted into the groove.

[0012] The battery cell pressurizing fixture as mentioned above may optionally further include an outer jacket plate, wherein the outer jacket plate is a box structure with an open upper portion, and the top plate and the bottom plate may be placed together in the outer jacket plate.

[0013] As the battery cell pressurizing fixture mentioned above, optionally, the front side wall of the outer sleeve plate is provided with a hole through which the pressure push rod passes, the hole is a threaded hole, and the pressure push rod is a screw; and / or the left and right side walls of the outer sleeve plate are hollowed out.

[0014] As for the battery cell pressurizing fixture mentioned above, optionally, a pad is provided in the battery cell receiving groove.

[0015] It can be seen from the above technical scheme that the utility model adopts two wedge-shaped pressure blocks to apply pressure to the battery cell. The wedge-shaped follower pressure block is pressed on the battery cell. When the wedge-shaped active pressure block moves along the inclined surface of the wedge-shaped follower pressure block under the action of the pressure push rod, the battery cell can be compressed by the wedge-shaped follower pressure block as a whole. Compared with the existing method of applying pressure at multiple positions and multiple points of the clamp, the wedge-shaped pressure block is pressed on the battery cell as a whole, and the pressure can be applied as a whole, and the pressure is more uniform, which can avoid the problem of uneven pressure application in multi-point pressurization; and the self-locking property of the wedge-shaped pressure block structure will not cause pressure release problems, and can ensure stable pressure at all times, which is convenient for the transfer and transportation of the battery cell. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the utility model, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 It is a schematic diagram of the structure of an embodiment of the utility model;

[0018] Figure 2 A cross-sectional view of an embodiment of the utility model;

[0019] Figure 3 It is a schematic diagram of the exploded structure of an embodiment of the utility model;

[0020] Figure 4 This is a schematic diagram of the structure after removing the top plate and outer jacket plate;

[0021] Figure 5 This is a schematic diagram of the structure after removing the top plate, outer shell plate and bottom plate.

[0022] The specific implementation of the utility model is further described in detail below with reference to the accompanying drawings. DETAILED DESCRIPTION

[0023] The utility model is described in detail below in conjunction with the accompanying drawings. When describing the embodiments of the utility model in detail, for the convenience of explanation, the drawings representing the device structure will not be partially enlarged according to the general proportion, and the schematic diagram is only an example, which should not limit the scope of protection of the utility model. It should be noted that the drawings are simplified in form and use non-precise proportions, which are only used to facilitate and clearly assist in explaining the purpose of the embodiments of the utility model. At the same time, in the description of this application, the terms "first", "second", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated; the terms "positive", "negative", "bottom", "upper", "lower", etc. indicate the orientation or position relationship based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the utility model.

[0024] In the description of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" 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 indirectly connected through an intermediate medium, it can also be the internal connection of two elements, it can be a wireless connection, or it can be a wired connection. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0025] like Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5As shown, the battery cell pressurizing fixture of this embodiment includes a top plate 1, a bottom plate 2, a wedge-shaped active pressure block 3, a wedge-shaped follower pressure block 4, a baffle 5 and a pressure push rod 6. Among them, the top plate 1 and the bottom plate 2 can be assembled together to form a storage space that can accommodate the battery cell. In this embodiment, the bottom plate 2 is provided with a battery cell storage groove 2a for accommodating the battery cell 100, and the battery cell 100 is placed in the battery cell storage groove 2a. The top plate 1 is covered on the bottom plate 2, and the top plate 1 and the bottom plate 2 of this embodiment are connected together by screws and other threaded fasteners. A threaded hole a is processed on the bottom plate 2, and a through hole b for the screw to pass through is processed on the top plate 1. After the screw (not shown) passes through the top plate 1, it is threadedly connected with the threaded hole a on the bottom plate 2. In other embodiments, the top plate 1 and the bottom plate 2 can also be connected together by a structure such as a buckle; or the bottom plate 1 and the top plate 2 can also be a non-detachable structure, such as the bottom plate 1 and the top plate 2 are formed into a box structure with an end face open.

[0026] The bottom plate 2 is also processed with a baffle fixing groove 2b, and the baffle 5 can be inserted into the baffle fixing groove 2b, so as to be fixed to the bottom plate 2. Optionally, a groove matching the baffle 5 can also be provided on the top plate 1, and the top of the baffle 5 can be inserted into the groove of the top plate 1 to better fix the baffle 5. The baffle 5 is opposite to the protruding end of the pole ear of the battery cell 100 placed in the battery cell receiving groove 2a. The baffle 5 is processed with a pole ear extension hole 5a for the pole ear to pass through, and a push rod through hole 5b for the pressure push rod 6 to pass through. After the battery cell 100 is placed in the battery cell receiving groove 2a and the baffle 5 is installed, the pole ear can extend from the pole ear extension hole 5a of the baffle 5. One end of the pressure push rod 6 passes through the push rod through hole 5b of the baffle 5 and extends into the battery cell receiving groove 2a. The baffle 5 and the bottom plate 2 of this embodiment are split structures, and the baffle 5 is detachably arranged on the bottom plate 2. In other embodiments, the baffle 5 and the bottom plate 2 can also be an integrated structure, such as the baffle can be the front side wall of the battery cell receiving groove. The baffle 5 adopts a split structure, which is more convenient for the battery cell to be taken and placed, and is convenient for the battery cell tab to be inserted.

[0027] The wedge-shaped active pressure block 3 and the wedge-shaped follower pressure block 4 are stacked on the battery cell 100. The wedge-shaped follower pressure block 4 is located on the battery cell 100, and the wedge-shaped active pressure block 3 is located on the wedge-shaped follower pressure block 4. The vertical section of the wedge-shaped active pressure block 3 and the wedge-shaped follower pressure block 4 of this embodiment (as shown in FIG. Figure 2 The cross-sections shown in the figure are all in the shape of a right triangle. Optionally, the length of the wedge-shaped follower pressure block 4 can be longer than the length of the wedge-shaped active pressure block 3, but the lengths of the wedge-shaped active pressure block 3 and the wedge-shaped follower pressure block 4 are both shorter than the length of the battery cell receiving groove 2a, so that they can be placed in the battery cell receiving groove 2a.

[0028] The wedge-shaped pressure block (the wedge-shaped active pressure block 3 and the wedge-shaped follower pressure block 4) is a structure with one end being small (the end where the inclined surface and the bottom surface of the wedge-shaped pressure block intersect) and one end being large (the end opposite to the aforementioned small end). For the sake of convenience, the small end of the wedge-shaped pressure block is defined as the first end, and the large end is defined as the second end. When the wedge-shaped follower pressure block 4 is placed into the battery cell receiving groove 2a, the first end of the wedge-shaped follower pressure block 4 and the battery cell pole ear are located on the same side, and the second end is located on the other side relatively away from the battery cell pole ear, and the inclined surface of the wedge-shaped follower pressure block 4 faces upward. The second end of the wedge-shaped follower pressure block 4 can be against the rear side wall of the battery cell receiving groove 2a (the side wall of the battery cell receiving groove 2a opposite to the baffle 5 is the rear side wall). The wedge-shaped active pressure block 3 is stacked on the wedge-shaped follower pressure block 4, and the inclined surface of the wedge-shaped active pressure block 3 is opposite to the inclined surface of the wedge-shaped follower pressure block 4, and the two inclined surfaces are in contact with each other. The second end of the wedge-shaped active pressure block 3 is located on the same side as the cell pole ear, and the first end is located on the other side relatively far away from the cell pole ear. The first end of the wedge-shaped active pressure block 3 is opposite to the rear side wall of the cell receiving groove 2a, that is, the wedge-shaped active pressure block 3 and the wedge-shaped follower pressure block 4 are stacked end to end. The top plate 1 is located on the wedge-shaped active pressure block 3.

[0029] After the pressure push rod 6 passes through the push rod through hole 5b of the baffle 5 into the battery cell accommodating groove 2a, one end portion thereof can be against the second end of the wedge-shaped active pressure block 3. The pressure push rod 6 of this embodiment is a screw. When the pressure push rod 6 is rotated, the pressure push rod 6 will push the wedge-shaped active pressure block 3 forward, so that the wedge-shaped active pressure block 3 moves toward the direction of the rear side wall of the battery cell accommodating groove 2a), and the wedge-shaped active pressure block 3 and the wedge-shaped follower pressure block 4 are stacked together, and the inclined surfaces of the two wedge blocks are in contact, so that the wedge-shaped active pressure block 3 moves forward along the inclined surface of the wedge-shaped follower pressure block 4, and is inserted more and more tightly between the top plate 1 and the wedge-shaped follower pressure block 4. In this process, the pressure can be transmitted to the battery cell 100 through the wedge-shaped follower pressure block 4 to compress the battery cell 100.

[0030] As an optional embodiment of the utility model, the battery cell pressurizing fixture of this embodiment also includes an outer jacket plate 7. The outer jacket plate 7 is a box structure with an open top. The assembled top plate 1 and bottom plate 2 (fixture) can be placed together in the outer jacket plate 7. A hole 7a for the pressure push rod 6 to pass through is processed on the front side wall of the outer jacket plate 7. The hole 7a of this embodiment is a threaded hole, and the pressure push rod 6 and the hole 7a are threadedly matched. The outer jacket plate 7 can facilitate the pressure operation of the pressure push rod 6. In addition, the four side walls (front side wall, rear side wall and left and right side walls) of the outer jacket plate 7 can limit and protect the assembled battery cell fixture. Further preferably, the left and right side walls of the outer jacket plate 7 are provided with hollows 7b, which can facilitate the placement and removal of the fixture.

[0031] Combine the following Figures 1 to 5 , the use of the battery cell pressurizing fixture of this embodiment is explained.

[0032] When using the battery cell pressurizing fixture, first put the battery cell 100 into the battery cell receiving groove 2a of the bottom plate 2, and then put the wedge-shaped follower pressure block 4 and the wedge-shaped active pressure block 3 in sequence, the wedge-shaped follower pressure block 4 is pressed on the battery cell 100, the wedge-shaped active pressure block 3 is pressed on the wedge-shaped follower pressure block 4, the wedge-shaped active pressure block 3 and the wedge-shaped follower pressure block 4 are offset and opposite to each other, that is, the first end of the wedge-shaped active pressure block 3 is opposite to the second end of the wedge-shaped follower pressure block 4, the second end of the wedge-shaped active pressure block 3 is opposite to the first end of the wedge-shaped follower pressure block 4, and the second end of the wedge-shaped follower pressure block is opposite to the rear side wall of the battery cell receiving groove 2a;

[0033] Insert the baffle 5 into the baffle fixing groove 2b of the bottom plate 2, and let the tab of the battery cell 100 pass through the tab extension hole 5a of the baffle 5, then cover the top plate 1, and connect the top plate 1 and the bottom plate 2 together with screws; push the wedge-shaped active pressure block 3 forward to insert it tightly between the top plate 1 and the wedge-shaped follower pressure block 4, apply a certain pre-pressure to the battery cell 100, and tighten the screws connecting the top plate 1 and the bottom plate 2;

[0034] Put the assembled top plate 1 and bottom plate 2 into the outer sleeve plate 7 together, and pass the pressure push rod 6 through the hole 7a on the outer sleeve plate 7 and the push rod through hole 5b on the baffle plate 5 in sequence. One end of the pressure push rod 6 extends into the battery cell accommodating groove 2a and abuts against the second end of the wedge-shaped active pressure plate 3. Continue to tighten the pressure push rod 6 so that the pressure push rod 6 continues to extend forward into the battery cell accommodating groove 2a and push the wedge-shaped active pressure block 3 so that the wedge-shaped active pressure block 3 moves along the inclined surface of the wedge-shaped follower pressure block 4. In the process of the wedge-shaped active pressure block 3 moving along the inclined surface, the wedge-shaped active pressure block 3 is inserted between the top plate 1 and the wedge-shaped follower pressure block 4 more and more tightly, and the wedge-shaped follower pressure block 4 presses the battery cell 100 downward as a whole. After the pressurization is completed, the pressure push rod 6 and the outer sleeve plate 7 can be removed. Due to the self-locking property of the wedge-shaped pressure block, there will be no sliding pressure release between the wedge-shaped active pressure block 3 and the wedge-shaped follower pressure block 4, and the battery cell 100 can continue to be pressed, which is convenient for the transfer of the battery cell.

[0035] The pressure push rod of the aforementioned embodiment is in the form of a bolt, and the wedge-shaped active pressure block is pushed by screwing the pressure push rod. In other embodiments, the pressure push rod can also be pneumatically or electrically driven, using a cylinder or an electric cylinder to push the wedge-shaped active pressure block.

[0036] In addition, when the battery cell models are different and the sizes vary, such as when the battery cell is thin and the wedge-shaped pressure block cannot apply pre-pressure to the battery cell after tightening the top plate or the pre-pressure is insufficient, pads of different thicknesses (not shown) can be added to the battery cell receiving groove to adapt to different battery cells and improve the versatility of the fixture. The pad can be added between the battery cell and the bottom surface of the battery cell receiving groove, between the battery cell and the wedge-shaped follower pressure block, or between the wedge-shaped active pressure block and the top plate. It is preferably placed between the wedge-shaped active pressure block and the top plate for easy operation and adjustment.

[0037] The utility model uses two wedge-shaped pressure blocks to apply pressure to the battery cell. On the one hand, compared with the existing clamps that apply pressure through multiple screws at multiple positions and multiple points, the wedge-shaped pressure block is pressed on the battery cell as a whole, which is a single-acting force for overall pressure application, which can be more evenly pressurized and can avoid the problem of uneven pressure application at multiple points. On the other hand, due to the self-locking property of the wedge-shaped pressure block structure, there will be no pressure relief problem, and continuous and stable pressure application can be guaranteed. The battery cell is placed in the battery cell receiving groove, and the side walls and blocks of the battery cell receiving groove can achieve all-around limiting. In addition, the constant pressure of the wedge-shaped pressure block prevents the battery cell from shifting or falling, making it easy to transfer and transport.

[0038] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A battery cell pressurizing fixture, characterized in that: include: A bottom plate provided with a battery cell receiving slot; A top plate disposed on the bottom plate and covering the battery cell receiving slot; A wedge-shaped active pressure block and a wedge-shaped follower pressure block are stacked end to end, and the wedge-shaped active pressure block, the wedge-shaped follower pressure block and the battery cell are placed in the battery cell receiving groove in sequence from top to bottom; A pressure push rod with one end extending into the battery cell receiving groove, one end of the pressure push rod abuts against the second end of the wedge-shaped active pressure block, and can push the wedge-shaped active pressure block to move toward the rear side wall of the battery cell receiving groove.

2. The battery cell pressurizing fixture according to claim 1, characterized in that: The vertical cross-sections of the wedge-shaped active pressure block and the wedge-shaped follower pressure block are right-angled triangles, the inclined surface of the wedge-shaped follower pressure block faces upward, the inclined surface of the wedge-shaped active pressure block is opposite to the inclined surface of the wedge-shaped follower pressure block, and the wedge-shaped active pressure block is in contact with the top plate; the first end of the wedge-shaped follower pressure block and the second end of the wedge-shaped active pressure block are located on the same side as the battery cell pole ear, and the second end of the wedge-shaped follower pressure block can be against the rear side wall of the battery cell receiving groove.

3. The battery cell pressurizing fixture according to claim 1, characterized in that: The length of the wedge-shaped follower pressure block is longer than the length of the wedge-shaped active pressure block.

4. The battery cell pressurizing fixture according to claim 1, characterized in that: It also includes a baffle plate arranged on the bottom plate, the baffle plate is opposite to the protruding end of the pole ear of the battery cell, the baffle plate is provided with a pole ear through hole and a push rod through hole, and one end of the pressure push rod passes through the push rod through hole and extends into the battery cell accommodating groove.

5. The battery cell pressurizing fixture according to claim 4, characterized in that: The baffle is detachably arranged on the bottom plate.

6. The battery cell pressurizing fixture according to claim 5, characterized in that: The bottom plate is provided with a baffle fixing groove, and the baffle can be inserted into the baffle fixing groove and fixed to the bottom plate.

7. The battery cell pressurizing fixture according to claim 6, characterized in that: The top plate is provided with a groove matched with the baffle plate, and the top of the baffle plate is inserted into the groove.

8. The battery cell pressurizing fixture according to claim 1, characterized in that: It also includes an outer shell plate, which is a box structure with an open upper portion, and the top plate and the bottom plate can be placed in the outer shell plate together.

9. The battery cell pressurizing fixture according to claim 8, characterized in that: The front side wall of the outer sleeve is provided with a hole through which the pressure push rod passes, the hole is a threaded hole, and the pressure push rod is a screw rod; And / or, the left and right side walls of the outer sleeve plate are provided with hollows.

10. The battery cell pressurizing fixture according to claim 1, characterized in that: A pad is arranged in the battery cell accommodating groove.

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