Battery cell tab bending clamp, bending welding mechanism, battery cell manufacturing device and battery

Abstract

The utility model relates to a battery cell tab bending clamp, a bending welding mechanism, a battery cell manufacturing device and a battery, the battery cell tab bending clamp comprises a first clamping piece, a second clamping piece and a shaping piece, the battery cell bending welding mechanism comprises a welding platform, an auxiliary bending device and a battery cell tab bending clamp, the welding platform is provided with a bearing surface, and the auxiliary bending device is arranged on the bearing surface. The bearing surface faces upwards, is used for placing an adapter and is in contact with the outer side of a preset straight section of a tab assembly of a target battery cell; the auxiliary bending equipment is used for bending a preset straight section of the tab assembly of the target battery cell to the press-fit surface side of the shaping part, and the press-fit surface of the shaping part is used for pressing the straight section of the bent tab assembly of the target battery cell on the welding platform. The battery cell tab bending clamp can drive the battery cell to move and enable the battery to be perpendicular to the welding platform, the shaping piece can keep a set position relation with the tab, the inner side of the bent tab assembly is free of redundancy, and the tab can be prevented from being inserted inversely.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to a battery cell tab bending fixture, a bending welding mechanism, a battery cell manufacturing device and a battery. Background Art

[0002] When placing the battery cell in the shell, in order to reduce the space occupied by the battery cell in the shell, the positive and negative electrode ear assemblies of the battery cell need to be bent, that is, the electrode ears are folded. After the electrode ears are folded, the top cover is assembled to the shell. Due to the limited internal space of the shell, the electrode ear assembly is prone to be inserted upside down into the electrode assembly under the downward pressure of the top cover. Especially for bipolar ear batteries, the internal electrode ear assembly is more likely to be redundant after bending, causing damage to the electrode assembly or even short circuit and scrap.

[0003] The Chinese invention patent with the authorization announcement number CN110560879B discloses a battery cell tab welding method and a secondary battery. The battery cell tab welding method is to stack the same-pole tabs of different battery cells on the corresponding adapter sheets in sequence, and place the corresponding upper adapter sheets on all the stacked same-pole tabs, and then perform an ultrasonic welding to weld all the same-pole tabs and the corresponding adapter sheets and upper adapter sheets together to form a tab lap structure. When the above-mentioned battery cell tabs are welded, the winding core is parallel to the welding table surface. When the core is closed, the inner tabs are easily redundant due to bending and inserted upside down inside the winding core; how to solve the problem of redundancy of the inner tabs after the battery cell is closed is a technical problem that needs to be solved urgently in this field. Utility Model Content

[0004] To this end, the utility model provides a battery cell tab bending fixture, a bending welding mechanism, a battery cell manufacturing device and a battery for preventing the redundancy of inner tabs after the battery cells are assembled.

[0005] In order to solve the above technical problems, the utility model provides a battery cell tab bending fixture, comprising:

[0006] A first clamping member, comprising a first clamping surface and a first end surface, wherein the first clamping surface faces the negative direction of the X-axis, and the first end surface faces the negative direction of the Y-axis;

[0007] a second clamping member, provided on the negative direction side of the first clamping member in the X-axis, the first clamping member and the second clamping member being spaced a certain distance apart, the second clamping member having a second clamping surface and a second end surface, the second clamping surface being opposite to the first clamping surface, the second end surface and the first end surface facing the same direction, the first clamping surface and the second clamping surface being used to clamp at both sides of the electrode assembly of the target battery cell in the thickness direction;

[0008] A shaping piece, one end of the shaping piece is relatively fixed to the first clamping piece, the other end of the shaping piece extends to the negative direction of the X-axis of the first clamping piece, the second clamping piece and the shaping piece are spaced a certain distance apart and the distance between the two is adjustable, the shaping piece has a pressing surface and a third end surface, the pressing surface and the second end surface face the same direction, the third end surface and the first clamping surface face the same direction, the third end surface abuts against the inner side of the preset bending section of the pole ear assembly of the target battery cell, and the pressing surface is used to press the inner side of the preset straight section of the pole ear assembly of the target battery cell;

[0009] The pressing surface protrudes from the first end surface or the two are flush with each other, and the pressing surface protrudes from the second end surface or the two are flush with each other.

[0010] Further, the first clamping surface and / or the second clamping surface and / or the first end surface and / or the second end surface and / or the pressing surface are planes.

[0011] Furthermore, the third end surface is an outwardly convex arc surface.

[0012] Furthermore, it also includes a connecting member, one end of which is relatively fixed to the first clamping member, the other end of which extends to the negative direction of the X-axis of the first clamping member and is relatively fixed to the second clamping member, and there is a certain distance between the connecting member and the shaping member.

[0013] Furthermore, the first clamping member, the second clamping member, the shaping member and the connecting member are all telescopic members, the first clamping member can be opened and closed relative to the second clamping member along the X-axis direction, the first clamping member can be telescopic along the Y-axis direction, the telescopic direction of the second clamping member is the same as the telescopic direction of the first clamping member, the telescopic directions of the shaping member and the connecting member are the same and are both the same as the opening and closing direction of the first clamping member.

[0014] The utility model also provides a battery cell tab bending and welding mechanism, comprising:

[0015] A welding platform, having a bearing surface, the bearing surface facing upward, for placing the adapter and contacting the outer side of the preset straight section of the tab assembly of the target battery cell;

[0016] The battery cell tab bending fixture, the pressing surface of the shaping piece is used to flatten the straight section of the bent tab assembly of the target battery cell onto the welding platform;

[0017] The auxiliary bending device is used to bend the preset straight section of the tab assembly of the target battery cell to the pressing surface side of the shaping piece.

[0018] Furthermore, the auxiliary bending device is an air blowing device, and the air blowing device is used to blow air toward the tab assembly of the target battery cell so that the tab assembly of the target battery cell fits onto the shaping piece.

[0019] The utility model also provides a battery core manufacturing device, comprising:

[0020] The battery cell tab bending and welding mechanism;

[0021] Transfer tray, used to support and position the target battery cells.

[0022] The utility model also provides a battery, comprising:

[0023] Battery housing;

[0024] A battery cell, wherein the battery cell is arranged in the battery shell, and the tab assembly of the battery cell adopts the battery cell tab bending and welding mechanism or the battery cell manufacturing device to perform tab bending and welding, and the tab assembly of the battery cell includes a bending section and a straight section, one end of the bending section is connected to the electrode assembly of the battery cell, one end of the straight section is connected to the other end of the bending section, and the other end of the straight section extends along the thickness direction of the battery cell.

[0025] Furthermore, the battery includes a plurality of battery cells, adapters and heat sinks, the battery cells are arranged in sequence along the thickness direction of the battery cells, the first surfaces of the electrode assemblies of every two battery cells are arranged opposite to each other, and the tab assemblies of the two battery cells are connected to the same adapter; the heat sink is arranged between the first surfaces of the electrode assemblies of two adjacent battery cells.

[0026] Furthermore, the heat sink is a heat-conducting insulating plate.

[0027] Furthermore, the battery further comprises a bottom support sheet supported at the bottom of the battery cell, the bottom support sheet is provided with a through hole corresponding to the position of the heat sink, and the heat sink contacts the bottom of the battery housing through the through hole.

[0028] The above technical solution of the utility model has the following advantages compared with the prior art:

[0029] 1) The battery cell tab bending fixture of the utility model is provided with a first clamping member, a second clamping member and a shaping member. On the one hand, the first clamping member and the second clamping member can clamp and fix the battery cell, thereby driving the battery cell to move and enabling the battery to be placed vertically on the welding platform. On the other hand, the shaping member can maintain a set position relationship with the tab, so as to facilitate the subsequent bending and shaping of the tab with the assistance of an auxiliary bending device.

[0030] 2) The battery cell tab bending fixture described in the utility model has the first clamping surface and the second clamping surface as planes, which ensures that the electrode assembly of the battery cell is evenly stressed, and the first end surface, the second end surface and the pressing surface are planes, which are convenient for processing and connection with other components, and the pressing surface is a plane, which also ensures that the tab assembly of the battery cell is evenly stressed;

[0031] 3) The third end face of the battery cell tab bending fixture of the utility model is an outwardly convex arc surface, so that the bending part of the tab assembly of the battery cell is an arc shape, ensuring that the tab assembly of the battery cell will not have stress concentration;

[0032] 4) The battery cell tab bending fixture of the utility model is connected as a whole by providing a connecting piece, and the fixture structure is simple and compact;

[0033] 5) The first clamping member, the second clamping member, the shaping member and the connecting member of the battery cell tab bending fixture described in the utility model are all telescopic members, which can realize the distance adjustment during the clamping process, and can also adjust the size of the battery cell tab bending fixture in all directions, so as to be suitable for clamping and fixing battery cells of different sizes;

[0034] 6) The battery cell tab bending and welding mechanism described in the utility model, the auxiliary bending device and the bending fixture cooperate with each other to bend the tab assembly of the target battery cell, and then the straight section of the tab assembly of the battery cell is pressed onto the welding platform by the bending fixture, so as to weld the tab and the adapter, and the battery cell is welded after being bent, so as to prevent the redundant inner tab and the inverted insertion of the tab;

[0035] 7) The auxiliary bending device of the battery cell tab bending and welding mechanism described in the utility model is an air blowing device. On the one hand, the battery cell tab assembly is pushed to bend by the airflow, which will not cause damage to the battery cell tab assembly; on the other hand, the airflow will not interfere with the bending process, and the bending and welding mechanism is easier to layout;

[0036] 8) The battery cell manufacturing device described in the utility model is convenient for the battery cell bending fixture to take out the battery cell by providing a transfer tray;

[0037] 9) The battery described in the utility model, the tab assembly of the battery cell manufactured by the above-mentioned bending welding mechanism or manufacturing device, after the tab is bent, the tab close to the inner concave side will not be redundant, which can prevent the tab of the battery cell from being inserted upside down;

[0038] 10) In the battery of the utility model, the tab assembly of the battery cell manufactured by the bending welding mechanism or manufacturing device will extend out of the side of the battery cell, so that there will be a certain distance between two adjacent battery cells. By setting a heat sink, the space between the two battery cells can be fully utilized, and the side of the battery cell can be cooled;

[0039] 11) In the battery of the present invention, the heat sink is a heat-conducting insulating plate, which can dissipate heat and isolate the large surfaces of two adjacent battery cells;

[0040] 12) The battery described in the utility model, by providing the through hole in the bottom support sheet, allows the heat sink to pass through the bottom support sheet and contact the bottom of the battery casing, so that the heat generated inside the battery is dissipated to the outside of the battery casing through the heat sink and the bottom of the battery casing, making it easier to achieve contact heat conduction between the heat sink and the battery casing. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] In order to make the content of the utility model more clearly understood, the utility model is further described in detail below based on specific embodiments of the utility model in combination with the accompanying drawings.

[0042] Figure 1 It is a schematic diagram of the battery cell in the utility model;

[0043] Figure 2 It is a schematic diagram of the battery cell tab bending fixture of the utility model;

[0044] Figure 3 The schematic diagram of the battery cell tab welding mechanism in this practical application;

[0045] Figure 4 It is a schematic diagram of the transfer tray in the utility model;

[0046] Figure 5 It is a schematic diagram of the battery in the utility model.

[0047] Description of the accompanying drawings: 1, battery cell; 11, electrode assembly; 12, tab assembly; 121, bent section; 122, straight section;

[0048] 2. Battery cell tab bending fixture; 21. First clamping piece; 211. First clamping surface; 212. First end surface; 22. Second clamping piece; 221. Second clamping surface; 222. Second end surface; 23. Shaping piece; 231. Pressing surface; 232. Third end surface; 24. Connecting piece;

[0049] 3. Welding platform; 31. Load-bearing surface; 4. Adapter; 5. Auxiliary bending equipment; 6. Transfer tray; 61. First tank body; 62. Second tank body; 7. Battery housing; 8. Heat sink; 9. Bottom support. DETAILED DESCRIPTION

[0050] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments so that those skilled in the art can better understand the present invention and implement it, but the embodiments are not intended to limit the present invention.

[0051] See also Figure 1 and Figure 2 As shown, an embodiment of the battery cell tab bending fixture in the utility model.

[0052] The battery cell tab bending fixture includes:

[0053] The first clamping member 21 has a first clamping surface 211 and a first end surface 212, wherein the first clamping surface 211 faces the negative direction of the X-axis, and the first end surface 212 faces the negative direction of the Y-axis;

[0054] The second clamping member 22 is provided on the negative side of the first clamping member 21 in the X-axis direction. The first clamping member 21 and the second clamping member 22 are spaced a certain distance apart. The second clamping member 22 has a second clamping surface 221 and a second end surface 222. The second clamping surface 221 is opposite to the first clamping surface 211. The second end surface 222 and the first end surface 212 face the same direction. The first clamping surface 211 and the second clamping surface 221 are used to clamp at both sides of the electrode assembly 11 of the target battery cell 1 in the thickness direction.

[0055] A shaping member 23, one end of the shaping member 23 is relatively fixed to the first clamping member 21, the other end of the shaping member 23 extends to the negative direction of the X-axis of the first clamping member 21, the second clamping member 22 and the shaping member 23 are spaced a certain distance apart and the distance between the two is adjustable, the shaping member 23 has a pressing surface 231 and a third end surface 232, the pressing surface 231 and the second end surface 222 face the same direction, the third end surface 232 and the first clamping surface 211 face the same direction, the third end surface 232 abuts against the concave side of the bent section of the tab assembly 12 of the target battery cell 1, and the pressing surface 231 is used to press the inner side of the straight section of the tab assembly 12 of the target battery cell 1;

[0056] The pressing surface 231 protrudes from the first end surface 212 or the two are flush with each other, and the pressing surface 231 protrudes from the second end surface 222 or the two are flush with each other.

[0057] The battery cell 1 in the prior art generally includes an electrode assembly 11 and a tab assembly 12. The electrode assembly 11 includes stacked multi-layer pole pieces and multi-layer separators. The tab assembly 12 includes stacked multi-layer pole pieces. The stacking direction of the pole pieces and separators is the thickness direction of the electrode assembly 11, and the stacking direction of the tabs is the thickness direction of the tab assembly 12. The extension direction of the tabs is the height direction of the electrode assembly 11 and the tab assembly 12, and the direction perpendicular to the thickness direction and height direction of the electrode assembly 11 is the length direction of the electrode assembly 11.

[0058] The first function of the above-mentioned battery cell tab bending fixture 2 (hereinafter referred to as the fixture) is to clamp the electrode assembly 11 of the battery cell 1, so as to drive the battery cell 1 to move and keep the battery cell 1 perpendicular to the welding platform. The second function of the above-mentioned fixture is to keep the shaping piece 23 and the tab assembly 12 of the battery cell 1 in a set positional relationship, that is, the shaping piece 23 is located on the inner side of the preset bending section of the tab assembly 12 of the battery cell 1, so as to facilitate the subsequent bending and shaping of the tab with the assistance of auxiliary bending equipment.

[0059] The first clamping member 21 and the second clamping member 22 are spaced at a certain distance from each other, which means that there is a gap between the two. The second clamping member 22 and the shaping member 23 are spaced at a certain distance from each other, which means that there is a gap between the two. The specific value of the gap is set or adjusted according to actual needs. The distance between the first clamping member 21 and the second clamping member 22 is adjustable so that the electrode assembly 11 of the target battery cell 1 can be clamped and loosened. The distance between the second clamping member 22 and the shaping member 23 is adjustable so that the tab assembly 12 of the battery cell 1 can be pushed against, so that the multi-layer tabs of the tab assembly 12 are brought together, which is conducive to the subsequent tab bending.

[0060] Through the above technical solution: on the one hand, the first clamping member 21 and the second clamping member 22 can clamp and fix the battery cell 1, so that the battery cell 1 can be driven to move later, and the battery can be placed vertically on the welding platform; on the other hand, the shaping member 23 can maintain a set position relationship with the pole ear assembly 12, so as to facilitate the subsequent bending and shaping of the pole ear assembly 12 with the assistance of auxiliary bending equipment.

[0061] In this embodiment, the first clamping surface 211 and / or the second clamping surface 221 and / or the first end surface 212 and / or the second end surface 222 and / or the pressing surface 231 are planes.

[0062] The first clamping surface 211 and the second clamping surface 221 are in contact with the side of the electrode assembly 11 and apply pressure to the electrode assembly 11. The first clamping surface 211 and the second clamping surface 221 are planes, which can ensure that the contact area with the electrode assembly 11 is large. When performing bending welding of the pole ear, the first end face 212 faces the welding platform. The first end face 212 is in contact with or not in contact with the welding platform. Therefore, in fact, the shape of the first end face 212 is not very important. The second end face 222 is connected to the shaping piece 23. The second end face 222 is a plane, which is convenient for connection with the shaping piece. The pressing surface 231 is in contact with the pole ear assembly 12 and applies pressure to the pole ear assembly 12. The pressing surface 231 is a plane, which can ensure that the contact area with the pole ear assembly 12 is large.

[0063] Through the above technical solution: the first clamping surface 211 and the second clamping surface 221 are planes, ensuring that the electrode assembly 11 of the battery cell 1 is evenly stressed; the first end face 212, the second end face 222 and the pressing surface 231 are planes, which are convenient for shape processing and connection with other components; the pressing surface 231 is a plane, which can also ensure that the tab assembly 12 of the battery cell 1 is evenly stressed.

[0064] In this embodiment, the third end surface 232 is an outwardly convex arc surface.

[0065] The third end surface 232 is in contact with the tab assembly 12 , which is equivalent to a conformal fitting surface of the tab assembly 12 . The third end surface 232 is an outwardly convex arc surface, and the inner side of the preset bending section of the tab assembly 12 is an arc shape.

[0066] Through the above technical solution: the third end surface 232 is an outwardly convex arc surface, so that the bending part of the tab assembly 12 of the battery cell 1 is an arc shape, ensuring that the tab assembly 12 of the battery cell 1 will not have stress concentration.

[0067] In this embodiment, a connecting member 24 is further included, one end of the connecting member 24 is relatively fixed to the first clamping member 21, the other end of the connecting member 24 extends to the negative direction of the X-axis of the first clamping member 21 and is relatively fixed to the second clamping member 22, and there is a certain distance between the connecting member 24 and the shaping member 23.

[0068] The first clamping member 21 and the second clamping member 22 are connected as a whole through the connecting member 24 , and then connected to the outside through one of the first clamping member 21 , the second clamping member 22 and the connecting member 24 .

[0069] Through the above technical solution: by providing the connecting piece 24, the clamps are connected as a whole, and the structure of the battery cell tab bending clamp is simple and compact.

[0070] In the present embodiment, the first clamping member 21, the second clamping member 22, the shaping member 23 and the connecting member 24 are all telescopic members, the first clamping member 21 can be opened and closed along the X-axis direction relative to the second clamping member 22, the first clamping member 21 can be telescopic along the Y-axis direction, the telescopic direction of the second clamping member 22 is the same as the telescopic direction of the first clamping member 21, the shaping member 23 and the connecting member 24 have the same telescopic directions and are both the same as the opening and closing directions of the first clamping member 21.

[0071] The size of the telescopic member can be changed, and can be adjusted manually or by power equipment. Generally, the telescopic function of the first clamping member 21 and the second clamping member 22 is to adapt to the placement and removal of different types of battery cells 1, and does not require frequent adjustment. It can be set to manual adjustment, and of course it can also be set to power equipment adjustment. The shaping member 23 and the connecting member 24 need to be frequently extended and retracted during the removal and removal of the battery cell 1, and it is best to set them to power equipment adjustment. In some cases, manual + spring adjustment can also be set, that is, the spring force causes the first clamping member and the second clamping member to clamp the battery cell, and the first clamping member and the second clamping member are released by manpower.

[0072] Through the above technical solution: the first clamping member 21, the second clamping member 22, the shaping member 23 and the connecting member 24 are all telescopic members. On the one hand, the distance can be adjusted to facilitate the removal of the battery cell 1. On the other hand, the size of the clamp in each direction can be adjusted to adapt to clamping and fixing battery cells 1 of different sizes.

[0073] See also Figure 3 As shown, an embodiment of the battery cell tab bending and welding mechanism in the utility model.

[0074] The battery cell tab bending and welding mechanism includes:

[0075] The welding platform 3 has a bearing surface 31, the bearing surface 31 faces upward, and is used to place the adapter 4 and contact the outer side of the straight section of the tab assembly 12 of the target battery cell 1;

[0076] The battery cell tab bending fixture 2, the pressing surface 231 of the above-mentioned shaping piece 23 is used to flatten the straight section of the bent tab assembly 12 of the target battery cell 1 onto the above-mentioned welding platform 3;

[0077] The auxiliary bending device 5 is used to bend the preset straight section of the tab assembly 12 of the target battery cell 1 to the side of the pressing surface 231 of the above-mentioned shaping piece 23.

[0078] The battery cell tab bending and welding mechanism (hereinafter referred to as the bending and welding mechanism) is used to bend and weld the tab assembly 12 of the battery cell 1 .

[0079] The above-mentioned auxiliary bending equipment 5 is used to apply external force to the pole tab assembly 12 of the target battery cell 1. It can be a thrust device or a blowing device, which applies thrust to the pole tab assembly 12 so as to bend the pole tab assembly 12. It can also be a clamping and traction device or a negative pressure suction device, which applies pulling force to the pole tab assembly 12 so as to bend the pole tab assembly 12.

[0080] The auxiliary bending device 5 can bend the tab assembly 12 before the bending fixture drives the battery cell 1 downward to approach the welding platform 3, or it can bend the tab assembly during the process of the bending fixture driving the battery cell 1 downward to approach the welding platform 3. The shaping member 23 presses the tab assembly 12 onto the welding platform 3, and subsequent welding (welding the tab assembly 12 and the adapter 4 together) can be performed.

[0081] Through the above technical solution: the auxiliary bending equipment 5 cooperates with the bending fixture to bend the pole ear assembly 12 of the target battery cell 1, and then the straight section of the pole ear assembly of the battery cell 1 is pressed onto the welding platform 3 through the bending fixture, so as to weld the pole ear and the adapter sheet, and the welding is performed after the battery cell is bent to prevent the redundant inner pole ear and prevent the pole ear from being inserted upside down.

[0082] In this embodiment, the auxiliary bending device 5 is an air blowing device, which is used to blow air toward the tab assembly 12 of the target battery cell 1 so that the tab assembly 12 of the target battery cell 1 fits onto the shaping member 23 .

[0083] The blowing device can be arranged near the welding platform 3 . When the fixture clamps the battery cell 1 and moves it above the welding platform 3 , the blowing device blows air toward the tab assembly 12 that is put together, thereby ensuring that the tab assembly 12 fits the shaping piece 23 .

[0084] Through the above technical solution: on the one hand, the pole ear assembly of the battery cell is pushed by the airflow, which will not cause damage to the pole ear assembly of the battery cell; on the other hand, the airflow will not interfere with the bending process, the bending and welding mechanism is easier to layout, and the structure is simpler.

[0085] See also Figure 4 As shown, an embodiment of the transfer tray of the utility model.

[0086] The battery cell manufacturing device includes:

[0087] The above-mentioned battery cell tab bending and welding mechanism;

[0088] The transfer tray 6 is used to support and position the target battery cell 1 .

[0089] Specifically, a groove is provided on the supporting surface of the transfer tray 6, and the groove includes a first groove body 61 and a second groove body 62. The groove width of the first groove body 61 is smaller than the length of the electrode assembly 11 of the target battery cell 1, the groove width of the first groove body 61 is greater than the width of the first clamping member 21, the groove depth of the first groove body 61 is greater than the thickness of the first clamping member 21, the groove width of the second groove body 62 is consistent with the length of the electrode assembly 11 of the target battery cell 1, the groove length of the second groove body 62 is consistent with the height of the electrode assembly 11 of the target battery cell 1, and the groove opening of the first groove body 61 passes through the groove bottom of the second groove body 62 to form two step portions at the groove bottom of the second groove body 62, and the two step portions are used to support and position the electrode assembly 11 of the target battery cell 1.

[0090] When the bending fixture clamps the battery cell, the width of the first clamp 21 is consistent with the length direction of the battery cell 1, the thickness of the first clamp 21 is consistent with the thickness direction of the battery cell 1, the groove width of the first trough body 61 is greater than the width of the first clamp 21, and the groove depth of the first trough body 61 is greater than the thickness of the first clamp 21, so that the first clamp 21 can extend into the first trough body 61, thereby clamping the battery cell 1. The purpose of the transfer tray 6 is to keep the battery cell 1 in a set position and form a space at the bottom of the battery cell 1 that allows the first clamp 21 to extend to the bottom of the battery cell 1, so that the clamp can clamp the battery cell. When in use, first place the battery cell 1 on the two step portions, and then the first clamp 21 extends to the bottom of the battery cell 1 through the first trough body 61, and the clamp clamps the battery cell, thereby clamping the battery cell 1.

[0091] Through the above technical solution: by providing the transfer tray 6, it is convenient for the clamp to take out the battery core.

[0092] See also Figure 5 As shown, an embodiment of the battery in the utility model.

[0093] Battery Included:

[0094] Battery housing 7;

[0095] The battery cell 1 is arranged in the battery shell 7, and the tab assembly 12 of the battery cell 1 is bent and welded by the battery cell tab bending and welding mechanism or the battery cell manufacturing device. The tab assembly 12 of the battery cell 1 includes a bending section 121 and a straight section 122, one end of the bending section 121 is connected to the electrode assembly 11 of the battery cell 1, one end of the straight section 122 is connected to the other end of the bending section 121, and the other end of the straight section 122 extends along the thickness direction of the battery cell 1.

[0096] The battery cell 1 is placed in the battery case 7 and injected with electrolyte. The tab assembly 12 of the battery cell 1 is connected to the pole on the battery case, or the tab assembly 12 of the battery cell is directly connected to the battery case (as an electrode). The electrolyte acts as a conductor and a reaction medium.

[0097] Through the above technical solution: for the tab assembly of the battery cell manufactured by the above battery cell tab bending and welding mechanism or battery cell manufacturing device, after the tab is bent, the tab close to the concave side will not be redundant, which can prevent the tab of the battery cell from being inserted upside down.

[0098] In this embodiment, the battery includes a plurality of battery cells 1, an adapter 4 and a heat sink 8. The battery cells 1 are arranged in sequence along the thickness direction of the battery cells. The first surfaces of the electrode assemblies 11 of every two battery cells 1 are arranged opposite to each other. The tab assemblies 12 of the two battery cells 1 are connected to the same adapter 4. The heat sink 8 is arranged between the first surfaces of the electrode assemblies 11 of two adjacent battery cells 1.

[0099] The tabs bent by the above-mentioned cell tab bending and welding mechanism or the above-mentioned cell manufacturing device generally protrude from the first surface of the electrode assembly 11 of the cell 1, resulting in a relatively large gap between two adjacent cells 1. During the battery charging and discharging process, the position where the temperature rise inside the cell 1 is the largest is between the two electrode assemblies 11. On this basis, in order to reduce the waste of internal space of the battery, a heat sink 8 is provided between two cells 1 with a larger gap to dissipate heat from the cell 1.

[0100] Through the above technical solution: by providing the heat sink 8, the space between the two battery cells 1 is fully utilized to dissipate heat from the side of the battery cell 1.

[0101] In this embodiment, the heat sink 8 is a heat-conducting insulating plate.

[0102] In the battery structure, in order to prevent the electrode assemblies 11 of different battery cells 1 from contacting each other and causing a short circuit, the electrode assemblies 11 of different battery cells 1 need to be insulated from each other. In order to improve the heat dissipation effect, the heat sink 8 is preferably in contact with the electrode assembly 11 of the battery cell 1. At this time, the heat sink 8 must not only achieve the function of heat dissipation, but also have insulation properties to prevent two adjacent battery cells 1 from being electrically connected through the heat sink 8. Specifically, the above-mentioned thermally conductive insulating plate can be both heat-conducting and insulating, and can be made of thermally conductive insulating materials. The above-mentioned thermally conductive insulating plate is, for example, an alumina ceramic plate, a silicone rubber plate, a magnesium oxide ceramic plate, etc.

[0103] According to the above technical solution, the heat sink 8 is a heat-conducting insulating plate, which can dissipate heat from the battery core 1 , while ensuring that no two adjacent battery cores 1 are electrically connected through the heat sink 8 .

[0104] In this embodiment, the battery further comprises a bottom support sheet 9 supported at the bottom of the battery cell 1 , the bottom support sheet 9 is provided with a through hole corresponding to the position of the heat sink 8 , and the heat sink 8 contacts the bottom of the battery housing 7 through the through hole.

[0105] In the battery structure, in order to prevent the winding core pole piece of the battery cell from contacting the bottom of the aluminum shell and causing a short circuit, a bottom support sheet is added between the bottom of the shell and the winding core to provide support and insulation. In this embodiment, in order to enhance the heat dissipation effect of the heat sink, the heat sink is preferably in contact with the battery shell. Since the heat sink is disposed between two adjacent battery cells, the heat sink is closest to the bottom of the battery shell. By providing the through holes in the bottom support sheet 9 as mentioned above, the heat sink passes through the bottom support sheet and contacts the bottom of the battery shell, so that the heat generated inside the battery is dissipated to the outside of the battery shell through the heat sink and the bottom of the battery shell, and the through holes on the bottom support sheet can position the heat sink.

[0106] Through the above technical solution: it is easier to achieve contact heat conduction between the heat sink 8 and the battery housing 7, and the heat sink 8 is positioned at a preset position.

[0107] Obviously, the above embodiments are merely examples for the purpose of clear explanation and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived from these are still within the scope of protection of the invention of the utility model.

Claims

1. A battery cell tab bending fixture, characterized in that: include: A first clamping member (21) having a first clamping surface (211) and a first end surface (212), wherein the first clamping surface (211) faces the negative direction of the X-axis, and the first end surface (212) faces the negative direction of the Y-axis; a second clamping member (22) disposed on the negative side of the first clamping member (21) in the X-axis direction, the first clamping member (21) and the second clamping member (22) being spaced a certain distance apart, the second clamping member (22) having a second clamping surface (221) and a second end surface (222), the second clamping surface (221) being opposite to the first clamping surface (211), the second end surface (222) and the first end surface (212) facing the same direction, the first clamping surface (211) and the second clamping surface (221) being used to clamp on both sides of the electrode assembly (11) of the target battery cell (1) in the thickness direction; a shaping piece (23), one end of the shaping piece (23) being fixed relative to the first clamping piece (21), the other end of the shaping piece (23) extending toward the negative direction of the X-axis of the first clamping piece (21), the second clamping piece (22) and the shaping piece (23) being spaced a certain distance apart and the distance between the two being adjustable, the shaping piece (23) having a pressing surface (231) and a third end surface (232), the pressing surface (231) and the second end surface (222) facing the same direction, the third end surface (232) and the first clamping surface (211) facing the same direction, the third end surface (232) being used to abut against the inner side of a preset bent section of the tab assembly (12) of the target battery cell (1), and the pressing surface (231) being used to press against the inner side of a preset straight section of the tab assembly (12) of the target battery cell (1); The pressing surface (231) protrudes from the first end surface (212) or the two are flush with each other, and the pressing surface (231) protrudes from the second end surface (222) or the two are flush with each other.

2. The battery cell tab bending fixture according to claim 1, characterized in that: The first clamping surface (211) and / or the second clamping surface (221) and / or the first end surface (212) and / or the second end surface (222) and / or the pressing surface (231) are planes.

3. The battery cell tab bending fixture according to claim 1, characterized in that: The third end surface (232) is an outwardly convex arc-shaped surface.

4. The battery cell tab bending fixture according to claim 1, characterized in that: It also comprises a connecting member (24), one end of the connecting member (24) being fixed relative to the first clamping member (21), the other end of the connecting member (24) extending towards the negative direction of the X-axis of the first clamping member (21) and being fixed relative to the second clamping member (22), and a certain distance being spaced between the connecting member (24) and the shaping member (23).

5. The battery cell tab bending fixture according to claim 4, characterized in that: The first clamping member (21), the second clamping member (22), the shaping member (23) and the connecting member (24) are all telescopic members; the first clamping member (21) can be opened and closed relative to the second clamping member (22) along the X-axis direction; the first clamping member (21) can be telescopic along the Y-axis direction; the telescopic direction of the second clamping member (22) is the same as that of the first clamping member (21); the shaping member (23) and the connecting member (24) have the same telescopic direction and both have the same opening and closing direction as the first clamping member (21).

6. A battery cell tab bending and welding mechanism, characterized in that: include: A welding platform (3) having a bearing surface (31), the bearing surface (31) facing upwards, being used for placing the adapter (4) and contacting the outer side of a preset straight section of a tab assembly (12) of a target battery cell (1); The battery cell tab bending fixture (2) according to any one of claims 1 to 5, wherein the pressing surface (231) of the shaping member (23) is used to flatten the straight section of the bent tab assembly (12) of the target battery cell (1) onto the welding platform (3); The auxiliary bending device (5) is used to bend a preset straight section of a tab assembly (12) of a target battery cell (1) to a pressing surface (231) side of the shaping piece (23).

7. The battery cell tab bending and welding mechanism according to claim 6, characterized in that: The auxiliary bending device (5) is an air blowing device, and the air blowing device is used to blow air toward the tab assembly (12) of the target battery cell (1) at the outer side of a preset bending section of the tab assembly (12) of the target battery cell (1).

8. A battery cell manufacturing device, characterized in that: include: The battery cell tab bending and welding mechanism according to claim 6; The transfer tray (6) is used to support and position the target battery cell (1).

9. A battery, characterized in that: include: Battery housing (7); A battery cell (1), the battery cell (1) being arranged in the battery housing (7), the tab assembly (12) of the battery cell (1) being bent and welded by the battery cell tab bending and welding mechanism according to claim 6 or the battery cell manufacturing device according to claim 7, the tab assembly (12) of the battery cell (1) comprising a bent section (121) and a straight section (122), one end of the bent section (121) being connected to the electrode assembly (11) of the battery cell (1), one end of the straight section (122) being connected to the other end of the bent section (121), and the other end of the straight section (122) extending along the thickness direction of the battery cell (1).

10. The battery according to claim 9, characterized in that The battery comprises a plurality of battery cells (1), an adapter (4) and a heat sink (8); the battery cells (1) are arranged in sequence along the thickness direction of the battery cells; the first surfaces of the electrode assemblies (11) of every two battery cells (1) are arranged opposite to each other; the tab assemblies (12) of the two battery cells (1) are connected to the same adapter (4); and the heat sink (8) is arranged between the first surfaces of the electrode assemblies (11) of two adjacent battery cells (1).

11. The battery according to claim 10, characterized in that The heat sink (8) is a heat-conducting insulating plate.

12. The battery according to claim 10, characterized in that The battery further comprises a bottom support sheet (9) supported on the bottom of the battery cell (1), the bottom support sheet (9) being provided with a through hole corresponding to the position of the heat sink (8), the heat sink (8) passing through the through hole to contact the bottom of the battery housing (7).

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