Tab rolling device

Abstract

The utility model discloses a rolling device for a tab, and relates to the technical field of battery production. The rolling device comprises a clamping mechanism and a rolling mechanism, the clamping mechanism comprises a plurality of clamping pieces, and the clamping pieces can move in the direction close to a module so as to press a busbar on the module to a battery cell body on the module; the rolling mechanism comprises a rolling head, the rolling head can move in the direction close to or away from the module, and the rolling head abuts against a pole lug of the module and can roll the pole lug. And the tabs, the body of the battery cell and the busbar are loosened, so that the quality and the safety of the battery module are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of battery production, in particular to a rolling device for ear tabs. Background Art

[0002] As a representative of green transportation, new energy vehicles have the advantages of energy conservation, environmental protection, cleanliness, etc. compared with traditional fuel vehicles, reducing the environmental protection cost and economic cost of vehicle use. New energy vehicles are powered by power batteries, and the quality of power batteries directly affects the use experience and safety of new energy vehicles.

[0003] In order to make the voltage and current of the power battery meet the requirements of new energy vehicles, the power battery is composed of multiple battery modules connected in series or in parallel. When assembling the battery module, a bus bar is arranged outside several battery cells, the ear tabs on the battery cells are passed through the bus bar and then bent, and the bent ear tabs are rolled to make the ear tabs fit more closely with the bus bar. However, if the fit between the bus bar and the battery cell is not tight, after rolling the ear tabs, it is easy for the ear tabs, the battery cells and the bus bar to become loose, affecting the quality and safety of the battery module. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a rolling device for ear tabs, which can make the bus bar fit tightly with the main body of the battery cell, thereby avoiding looseness between the ear tabs, the main body of the battery cell and the bus bar after rolling, and improving the quality and safety of the battery module.

[0005] To achieve the above object, the utility model adopts the following technical solutions:

[0006] A rolling device for ear tabs, comprising:

[0007] A clamping mechanism, including a plurality of clamping members, the clamping members can move towards the direction close to the module to press the bus bar on the module against the main body of the battery cell on the module;

[0008] A rolling mechanism, including a rolling head, the rolling head can move towards or away from the module, and the rolling head can press against the ear tab on the module to roll the ear tab.

[0009] As an optional solution of the above rolling device for ear tabs, the rolling head includes a pressing member and a roller, the roller is rotatably arranged on the pressing member, the pressing member can move along a first direction to approach or move away from the main body, and move along a second direction to roll the ear tab, and the first direction and the second direction are arranged at an angle.

[0010] As an alternative to the above-mentioned roller pressing device for the tab, the roller head further includes a fixing member and an elastic member. The fixing member is movably arranged along the first direction. The pressing member is slidably arranged along the first direction on the fixing member. The elastic member is arranged between the fixing member and the pressing member. The elastic member is configured to contract or extend when the pressing member and the fixing member slide relative to each other.

[0011] As an alternative to the above-mentioned roller pressing device for the tab, the roller head further includes a limiting member. The limiting member is fixedly connected to the pressing member. The fixing member has a limiting structure. The limiting structure can limit the moving range of the pressing member in the first direction through the limiting member.

[0012] As an alternative to the above-mentioned roller pressing device for the tab, the fixing member is provided with a limiting groove. The limiting groove forms the limiting structure. The limiting member is movably arranged along the first direction in the limiting groove.

[0013] As an alternative to the above-mentioned roller pressing device for the tab, the roller pressing mechanism further includes:

[0014] A slide rail, the slide rail extends along the third direction. The third direction is arranged at an angle with both the first direction and the second direction;

[0015] A first slider, the first slider is slidably arranged along the third direction on the slide rail;

[0016] A second slider, the second slider is slidably arranged along the second direction on the first slider. The roller head is slidably arranged along the first direction on the second slider.

[0017] As an alternative to the above-mentioned roller pressing device for the tab, the clamping mechanism includes a fourth driving member. A plurality of clamping members are divided into two groups. Each group of the clamping members includes at least one clamping member. The module is located between the two groups of clamping members. The fourth driving member is configured to drive the two groups of clamping members to approach or separate from each other to clamp and release the module.

[0018] As an alternative to the above-mentioned roller pressing device for the tab, the roller pressing device further includes a frame. The clamping mechanism includes a moving member. The fourth driving member is arranged on the moving member. The moving member is movably arranged on the frame to drive the fourth driving member and the clamping members to move in a direction close to or away from the top surface of the module.

[0019] As an alternative to the above-mentioned roller pressing device for the tab, the clamping member includes a clamping portion and an avoidance portion. The clamping portion is configured to clamp the bus bar and the body. The roller head can pass through the avoidance portion to roll press the tab.

[0020] As an alternative to the above-mentioned rolling device for the tab, the clamping member is provided with an avoidance hole, the tab is located in the avoidance hole, and the avoidance hole forms the avoidance portion.

[0021] Advantages of the present utility model:

[0022] The present utility model provides a rolling device for a tab. In this rolling device, the clamping member of the clamping mechanism can clamp the bus bar and the main body of the battery cell, so that the bus bar is closely attached to the main body of the battery cell. Then, the rolling head is moved so that the rolling head abuts against the tab, and then the rolling head is moved along the second direction to roll the tab, so that the tab is attached to the bus bar.

[0023] This rolling device can make the bus bar closely attached to the main body of the battery cell, thereby avoiding looseness among the tab, the main body of the battery cell, and the bus bar after rolling, and improving the quality and safety of the battery module. Description of the drawings

[0024] Figure 1 is a side view of the rolling device for the tab provided by the present utility model;

[0025] Figure 2 is a schematic structural view of the rolling mechanism provided by the present utility model Figure 1 ;

[0026] Figure 3 is a schematic structural view of the rolling mechanism provided by the present utility model Figure 1 ;

[0027] Figure 4 is a front view of the clamping member provided by the present utility model.

[0028] In the figure:

[0029] 100, battery cell; 101, main body;

[0030] 1, clamping mechanism; 2, rolling mechanism; 3, frame;

[0031] 11, clamping member; 12, moving member; 13, third driving member; 14, fourth driving member; 21, rolling head; 22, slide rail; 23, first slider; 24, second slider; 25, fixing plate; 26, first driving member; 27, second driving member;

[0032] 111, clamping portion; 112, avoidance portion; 211, pressing member; 212, roller; 213, fixing member; 214, elastic member; 215, limiting member;

[0033] 2131, limiting groove. Detailed implementation manners

[0034] Embodiments of the present utility model will be described in detail below. Examples of the embodiments are shown in the accompanying drawings, where like or similar reference numerals designate like or similar elements or elements having like or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to explain the present utility model, and should not be construed as limiting the present utility model.

[0035] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings. These are only for the convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present utility model. In addition, the terms "first" and "second" are only used for descriptive purposes and should not be construed as indicating or implying relative importance. Among them, the terms "first position" and "second position" are two different positions.

[0036] Unless otherwise clearly defined and limited, the terms "installed", "connected", "connected", and "fixed" should be understood in a broad sense. For example, it can be a fixed connection or a detachable connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0037] Unless otherwise clearly defined and limited, the first feature being "above" or "below" the second feature may include the first feature and the second feature being in direct contact, or may include the first feature and the second feature not being in direct contact but being in contact through other features therebetween. Moreover, the first feature being "above", "over", and "on" the second feature includes the first feature being directly above and obliquely above the second feature, or merely indicating that the first feature has a higher horizontal height than the second feature. The first feature being "below", "under", and "beneath" the second feature includes the first feature being directly below and obliquely below the second feature, or merely indicating that the first feature has a lower horizontal height than the second feature.

[0038] The technical solution of the present utility model will be further described below with reference to the accompanying drawings and through specific embodiments.

[0039] The battery module is composed of a plurality of battery cells connected in series or in parallel, such as Figure 1As shown, the battery cell 100 includes a body 101 and tabs. When assembling the battery module, a bus bar is provided at one end of the battery cell 100 where the tab is located. The tab on the battery cell 100 is passed through the bus bar and then bent, and the bent tab is roll-pressed to make the tab fit more closely to the bus bar. However, if the fit between the bus bar and the battery cell 100 is not tight, after roll-pressing the tab, it is easy for the tab, the battery cell 100 and the bus bar to become loose, affecting the quality and safety of the battery module.

[0040] To solve the above problems, this embodiment provides a roll-pressing device for tabs, as Figures 1 to 3 shown. The roll-pressing device includes a clamping mechanism 1 and a roll-pressing mechanism 2. The clamping mechanism 1 includes a number of clamping members 11. The clamping members 11 can move towards the direction close to the module to press the bus bar on the module against the battery cell body 101 on the module. The roll-pressing mechanism 2 includes a roll-pressing head 21. The roll-pressing head 21 can move towards or away from the module. The roll-pressing head 21 can press against the tab on the module to roll-press the tab.

[0041] In this roll-pressing device, the clamping members 11 of the clamping mechanism 1 can clamp the bus bar and the body 101 of the battery cell 100, so that the bus bar and the body 101 of the battery cell 100 are closely attached. Then, the roll-pressing head 21 is moved so that the roll-pressing head 21 abuts against the tab, and then the roll-pressing head 21 is moved along the second direction to roll-press the tab, so that the tab fits with the bus bar.

[0042] This roll-pressing device can make the bus bar and the body 101 of the battery cell 100 closely attached, thus avoiding loosening between the tab, the body 101 of the battery cell 100 and the bus bar after roll-pressing, and improving the quality and safety of the battery module.

[0043] Specifically, the roll-pressing head 21 includes a pressing member 211 and a roller 212. The roller 212 is rotatably arranged on the pressing member 211. The pressing member 211 can move along the first direction (the X direction in the figure) to approach or move away from the body 101, and move along the second direction (the Y direction in the figure) to roll-press the tab. The first direction and the second direction are arranged at an angle. During the process of the pressing member 211 approaching the body 101, the roller 212 can press against the tab, and then when the pressing member 211 moves along the second direction, the roller 212 can roll-press the tab, which can not only ensure the fit between the tab and the bus bar, but also avoid scratching the tab by the roll-pressing head 21.

[0044] Under normal circumstances, multiple battery cells 100 of a battery module are arranged in the horizontal direction, and the tabs are located at the side ends of the battery cells 100. For the convenience of description, in this embodiment, multiple battery cells 100 of the battery module are arranged in the third direction (the Z direction in the figure), and the tabs of the battery cells 100 are located at both ends in the first direction of the body 101. After the tabs are bent, the roller 212 moves in the second direction to roll the tabs. Therefore, the second direction is the vertical direction, both the first direction and the third direction are the horizontal direction, and the first direction, the second direction, and the third direction are set at an angle to each other.

[0045] When rolling the tabs, the rolling head 21 first rolls the tabs of one battery cell 100, and then the rolling head 21 moves a distance equal to the thickness of one battery cell 100 in the third direction. The rolling head 21 moves to the adjacent battery cell 100 to roll the tabs. By analogy, the tabs at one end of all the battery cells 100 of the battery module can be rolled.

[0046] If the two tabs of the battery cell 100 extend from opposite ends of the body 101, only the battery module needs to be rotated 180°, and then the tabs on the other side can be rolled; if the two tabs of the battery cell 100 extend from the same end of the body 101, only the tabs at this end need to be rolled.

[0047] It should be noted that if the two tabs of the battery cell 100 extend from the same end of the body 101, there are two cases. One is that the two tabs are arranged at intervals in the third direction. At this time, it is necessary to make the roller 212 capable of rolling the two tabs at the same time, or the roller 212 capable of rolling one tab, and each tab of each battery cell 100 is rolled separately, or the rolling mechanism 2 is provided with two rolling heads 21, so as to achieve the purpose of rolling the two tabs at the same time; the other is that the two tabs are arranged at intervals in the second direction. At this time, only by moving the roller 212 in the second direction, the rolling of the two tabs can be completed.

[0048] In this embodiment, the two tabs of the battery cell 100 extend from the same side of the body 101, and the two tabs are arranged at intervals in the third direction. Therefore, the rolling mechanism 2 is provided with two rolling heads 21 arranged at intervals in the third direction, and the distance between the two rolling heads 21 is adjustable.

[0049] The rollers 212 of the two rolling heads 21 can roll the two battery cells 100 of the body 101 at the same time, improving the efficiency of rolling the tabs. Moreover, since the distance between the two rolling heads 21 is adjustable, the rolling device can be applied to battery cells 100 with different tab spacings, improving the applicability.

[0050] Such as Figure 1 and Figure 2As shown, the rolling mechanism 2 further includes a slide rail 22, a first slider 23, and a second slider 24. The slide rail 22 extends in the third direction. The first slider 23 is slidably disposed on the slide rail 22 in the third direction. The second slider 24 is slidably disposed on the first slider 23 in the second direction. The rolling head 21 is slidably disposed on the second slider 24 in the first direction.

[0051] The first slider 23 can drive the second slider 24 to move in the third direction. The second slider 24 can drive the rolling head 21 to slide in the second direction, and the rolling head 21 can slide in the first direction, so that the rolling head 21 can move in three directions.

[0052] Furthermore, the rolling mechanism 2 further includes a first driving member 26 and a second driving member 27. The first driving member 26 is disposed on the first slider 23, and the output end of the first driving member 26 is connected to the second slider 24. The second driving member 27 is disposed on the second slider 24, and the output end of the second driving member 27 is connected to the rolling head 21. Wherein, the slide rail 22 is a linear motor, and the first slider 23 is connected to the mover of the linear motor.

[0053] It should be noted that, for the convenience of control, the first direction, the second direction, and the third direction are perpendicular to each other in pairs.

[0054] In this embodiment, the clamping mechanism 1 includes a fourth driving member 14. A plurality of clamping members 11 are divided into two groups, and each group includes at least one clamping member 11. The module is located between the two groups of clamping members 11. The fourth driving member 14 is used to drive the two groups of clamping members 11 to approach or separate from each other to clamp and release the module.

[0055] Wherein, the fourth driving member 14 can be a power source, such as a motor driving a gear to rotate, and racks connected to the clamping members 11 are engaged on both sides of the gear. When the gear rotates, the two racks move in opposite directions to drive the two clamping members 11 to approach or separate from each other; the fourth driving member 14 can also be two power sources, such as two cylinders, two linear motors, or two screw-nut driving structures, and each power source independently controls the movement of one clamping member 11.

[0056] As Figure 1 As shown, the rolling device further includes a frame 3. The rolling mechanism 2 and the clamping mechanism 1 are both disposed on the frame 3. Specifically, the clamping mechanism 1 includes a moving member 12. The fourth driving member 14 is disposed on the moving member 12. The moving member 12 is movably disposed on the frame 3 to drive the fourth driving member 14 and the clamping members 11 to move in a direction closer to or farther from the top surface of the module.

[0057] Among them, the module is placed on the horizontal support surface. At this time, the top surface of the module refers to the surface facing upward of the module. That is to say, the moving member 12 moves downward from top to bottom to approach the battery module, so that the two clamping members 11 can clamp the bus bar to the body 101. After the operation of rolling the tab is completed, the moving member 12 can also move away from the battery module, so as to facilitate the removal of the battery module.

[0058] In this embodiment, the clamping mechanism 1 further includes a third driving member 13. The third driving member 13 is arranged on the frame 3, the output end of the third driving member 13 is connected to the moving member 12, and the fourth driving member 14 is arranged on the moving member 12. The third driving member 13 can drive the moving member 12 to approach or move away from the battery module. When the moving member 12 approaches the battery module, the fourth driving member 14 can drive the two clamping members 11 to approach each other to clamp the body 101 of the battery cell 100 and the bus bar.

[0059] Specifically, the third driving member 13 can be a linear driving structure such as a cylinder, a linear motor or a lead screw nut driving structure, and drives the moving member 12 to move along the second direction.

[0060] As Figure 4 shown, the clamping member 11 needs to clamp the bus bar and also needs to make room for rolling the tab. Therefore, the clamping member 11 includes a clamping portion 111 and an avoidance portion 112. The clamping portion 111 is configured to clamp the bus bar and the body 101, and the roller 212 can pass through the avoidance portion 112 to roll the tab.

[0061] In this embodiment, the clamping member 11 is provided with an avoidance hole, the tab is located in the avoidance hole, and the avoidance hole forms the avoidance portion 112. That is to say, the clamping portion 111 is a frame-shaped structure. The clamping portion 111 can clamp the bus bar to the body 101 of the battery cell 100, and the clamping force is distributed along the outer circumference of the bus bar to ensure that the bus bar is in contact with the body 101 everywhere. The roller 212 can press against the tab through the avoidance hole, so as to roll the tab. It should be noted that the avoidance hole extends along the third direction to expose all the tabs of the battery cell 100.

[0062] After the bus bar is clamped and fixed to the body 101 of the battery cell 100, the tab can be pre-bent so that an acute angle is formed between the tab and the bus bar, which is convenient for rolling. When rolling, it is necessary to make the roller 212 approach and press against the tab. In order to avoid damaging the tab or the bus bar due to excessive pressing force, the rolling head 21 further includes a fixing member 213 and an elastic member 214. The fixing member 213 is arranged to move along the first direction, the pressing member 211 is arranged to slide along the first direction on the fixing member 213, and the elastic member 214 is arranged between the fixing member 213 and the pressing member 211. The elastic member 214 is used to contract or extend when the pressing member 211 and the fixing member 213 slide relative to each other.

[0063] When the roller 212 abuts against the tab, the elastic member 214 is compressed, so that the force of the roller 212 pressing against the tab gradually increases. This can not only ensure that the pressing force is sufficient to make the tab fit the bus bar, but also avoid the sudden increase of the pressing force resulting in the tab being damaged.

[0064] As Figures 1 to 3 shown, the rolling mechanism 2 further includes a fixing plate 25. Both rolling heads 21 are fixedly connected to the fixing plate 25 through fixing members 213. The output end of the second driving member 27 is connected to the fixing plate 25, and the second driving member 27 can control the movement of both rolling heads 21 simultaneously.

[0065] In this embodiment, the rolling head 21 further includes a limiting member 215. The limiting member 215 is fixedly connected to the pressing member 211. The fixing member 213 has a limiting structure, and the limiting structure can limit the movement range of the pressing member 211 in the first direction through the limiting member 215. The limiting structure can limit the stroke of the pressing member 211 through the limiting member 215, and can prevent the elastic member 214 from pushing the pressing member 211 away from the fixing member 213, ensuring the stability of the rolling device.

[0066] In this embodiment, the fixing member 213 is provided with a limiting groove 2131, and the limiting groove 2131 forms a limiting structure. The limiting member 215 is movably arranged in the limiting groove 2131 along the first direction. Both ends of the limiting groove 2131 along the first direction have inner walls, and the limiting member 215 is limited when it abuts against the inner wall of the limiting groove 2131. The structure is simple and reliable.

[0067] In some embodiments, the fixing member 213 protrudes with a limiting protrusion, and the limiting member 215 abuts against the limiting protrusion to be limited. When the roller 212 abuts against the tab, the limiting member 215 moves away from the limiting protrusion.

[0068] In this embodiment, the pressing member 211 includes two limiting members 215, and the two limiting members 215 are arranged at intervals. A part of the fixing member 213 is located between the two limiting members 215 and slidably abuts against the two limiting members 215. Both limiting members 215 of the pressing member 211 are slidably abutted against the fixing member 213. At this time, the limiting member 215 can not only play a role in limiting the stroke, but also limit the relative movement between the pressing member 211 and the fixing member 213 in the second direction, ensuring the stable movement of the pressing member 211.

[0069] In this embodiment, the rolling mechanism 2 further includes a guide rail. The guide rail is arranged on the fixing member 213 along the first direction, and the pressing member 211 is slidably connected to the guide rail. The guide rail can provide a guiding effect for the movement of the pressing member 211, further improving the movement accuracy of the pressing member 211. Moreover, the guide rail and the two spaced limiting members 215 can jointly ensure the stability of the relative movement between the pressing member 211 and the fixing member 213.

[0070] The above content is only a preferred embodiment of the present utility model. For those of ordinary skill in the art, according to the idea of the present utility model, there will be changes in the specific implementation manner and application scope. The content of this specification should not be construed as a limitation to the present utility model.

Claims

1. A rolling device for a tab, characterized in that: include: A clamping mechanism (1) comprising a plurality of clamping members (11), wherein the clamping members (11) are capable of moving in a direction close to the module so as to press the busbar on the module against the cell body (101) on the module; The rolling mechanism (2) comprises a rolling head (21), wherein the rolling head (21) can move in a direction close to or away from the die set, and the rolling head (21) can press against the pole ear of the die set to roll the pole ear.

2. The tab rolling device according to claim 1, characterized in that: The rolling head (21) comprises a pressing member (211) and a roller (212); the roller (212) is rotatably disposed on the pressing member (211); the pressing member (211) is capable of moving along a first direction to approach or move away from the body (101), and moving along a second direction to roll the tab; the first direction and the second direction are disposed at an angle.

3. The tab rolling device according to claim 2, characterized in that: The roller pressing head (21) further comprises a fixing member (213) and an elastic member (214); the fixing member (213) is movably arranged along the first direction; the pressing member (211) is slidably arranged on the fixing member (213) along the first direction; the elastic member (214) is arranged between the fixing member (213) and the pressing member (211); the elastic member (214) is used to contract or extend when the pressing member (211) and the fixing member (213) slide relative to each other.

4. The tab rolling device according to claim 3, characterized in that: The roller pressure head (21) further comprises a limiting member (215), wherein the limiting member (215) is fixedly connected to the pressing member (211), and the fixing member (213) has a limiting structure, wherein the limiting structure can limit the movement range of the pressing member (211) in the first direction through the limiting member (215).

5. The tab rolling device according to claim 4, characterized in that: The fixing member (213) is provided with a limiting groove (2131), the limiting groove (2131) forms the limiting structure, and the limiting member (215) is arranged in the limiting groove (2131) so as to be movable along the first direction.

6. The tab rolling device according to claim 2, characterized in that: The rolling mechanism (2) further comprises: A slide rail (22), the slide rail (22) extending along a third direction, the third direction being arranged at an angle to both the first direction and the second direction; A first sliding block (23), the first sliding block (23) being slidably disposed on the sliding rail (22) along the third direction; A second slider (24), wherein the second slider (24) is slidably disposed on the first slider (23) along the second direction, and the roller pressing head (21) is slidably disposed on the second slider (24) along the first direction.

7. The tab rolling device according to any one of claims 1 to 6, characterized in that: The clamping mechanism (1) comprises a fourth driving member (14), a plurality of clamping members (11) are divided into two groups, each group of the clamping members comprises at least one clamping member (11), the module is located between the two groups of the clamping members (11), and the fourth driving member (14) is used to drive the two groups of the clamping members (11) to move closer to or farther from each other, so as to achieve clamping and loosening of the module.

8. The tab rolling device according to claim 7, characterized in that: The rolling device also includes a frame (3), the clamping mechanism (1) includes a moving member (12), the fourth driving member (14) is arranged on the moving member (12), and the moving member (12) is movably arranged on the frame (3) to drive the fourth driving member (14) and the clamping member (11) to move in a direction close to or away from the top surface of the mold assembly.

9. The tab rolling device according to claim 8, characterized in that: The clamping member (11) comprises a clamping portion (111) and an avoidance portion (112), wherein the clamping portion (111) is configured to clamp the busbar and the body (101), and the rolling head (21) can be inserted into the avoidance portion (112) to roll the tab.

10. The tab rolling device according to claim 9, characterized in that: The clamping piece (11) is provided with an escape hole, the pole lug is located in the escape hole, and the escape hole forms the escape portion (112).

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