A jig for assembling a protection sheet of a lithium ion battery

Abstract

This utility model discloses a fixture for assembling protective sheets for lithium-ion batteries, belonging to the field of lithium-ion battery assembly technology. The fixture includes a slot, a positioning hole, and a positioning end in its longitudinal direction. The fixture further includes: an installation area adjacent to the slot; a force-applying mechanism installed in the installation area; and a connecting channel connecting the installation area and the slot. When the protective sheet is placed into the slot, the force-applying mechanism applies pressure to the protective sheet through the connecting channel to fix it in place. This utility model improves upon existing protective sheet fixtures by using a force-applying mechanism to apply pressure to the protective sheet through the connecting channel when it is placed into the slot, thus preventing the protective sheet from shifting within the slot or even flying out during fixture transfer.

Description

Technical Field

[0001] This utility model relates to the field of lithium-ion battery assembly technology, and more specifically, to a fixture for assembling protective sheets for lithium-ion batteries. Background Technology

[0002] Currently, ultrasonic welding is widely used in the assembly process of lithium-ion batteries to effectively weld the cell tabs to the connecting pieces and protective pieces.

[0003] Protective tabs, also known as insulating tabs or separators, primarily function to prevent direct contact between the positive and negative electrodes inside the battery, thus avoiding dangerous situations such as short circuits and overheating. Protective tabs are typically made of materials such as polyolefins, possessing good insulation properties and a certain degree of mechanical strength. During battery assembly, the protective tab is placed between the positive and negative electrodes of the cell, forming a physical barrier. Connecting tabs, also known as conductive tabs or current collectors, primarily function to conduct current from the battery's internal tabs to the external circuitry, or to introduce current from the external circuitry into the battery. Connecting tabs are typically made of metals with good conductivity, such as copper or aluminum, exhibiting low resistance and good corrosion resistance. During battery assembly, connecting tabs are connected to the tabs and the battery casing or cover plate through welding or other methods, forming a stable electrical connection. Tabs, also known as electrode leads or terminals, are the lead-out parts of the positive and negative electrodes inside the battery, used to connect the electrode materials to the external circuitry. Tabs are typically made of metal foil, such as aluminum foil for the positive electrode and copper foil for the negative electrode, possessing good conductivity and mechanical strength. During battery assembly, tabs are welded onto electrode material and connected to the battery casing or cover via connecting tabs.

[0004] like Figure 1 As shown, in existing protective sheet fixtures, after the robotic arm presses the protective sheet into the protective sheet slot, the protective sheet rests flat on four small protrusions in the slot, with a gap of 1mm to 3mm between the protective sheet and the edge of the slot. During fixture transfer, the protective sheet will shift in the direction of movement due to inertia. Because the protective sheet is very thin, this displacement may cause it to shift, or even detach from the support of the small protrusions, falling out of the slot and flying out through the gap between the protective sheet fixture and the electrode tab. The shifting and flying out of the protective sheet can cause over-soldering defects, substandard weld strength and effective area, and the risk of the protective sheet cutting the electrode tab, seriously affecting the battery yield, quality, and safety risks. Utility Model Content

[0005] To address the problem that protective sheets may shift or even fly off during the transfer process in existing protective sheet fixtures, this invention proposes a fixture for assembling protective sheets for lithium-ion batteries.

[0006] According to an embodiment of this utility model, a fixture for assembling protective sheets for lithium-ion batteries is provided. The fixture includes a slot, a positioning hole, and a positioning end in its longitudinal direction. The positioning hole is located in the middle of the fixture, the positioning end is located at both ends of the fixture, and the slot is located between the positioning hole and the positioning end. The fixture further includes: an installation area adjacent to the slot; a force-applying mechanism installed in the installation area; and a connecting channel connecting the installation area and the slot. When the protective sheet is placed into the slot, the force-applying mechanism applies pressure to the protective sheet through the connecting channel to fix the protective sheet in place.

[0007] As a more specific embodiment of the above implementation, the installation area includes a main connecting groove, which is disposed between the slot and the positioning end; the connecting channel includes a main channel extending from a first main channel opening to a second main channel opening, wherein the first main channel opening is formed on the main open side of the main connecting groove, and the second main channel opening is formed on the first side of the slot, and the slot and the main connecting groove are connected through the main channel; the force-applying mechanism includes a main elastic component, which is disposed in the main connecting groove and partially extends out of the main channel, for abutting against the protective sheet when the protective sheet is located in the slot, so as to apply pressure to the protective sheet to fix it in place. By setting the main connecting groove, the main channel and the main elastic component on the basis of the existing protective sheet fixture, the main elastic component can apply pressure to the protective sheet through the main channel to fix the protective sheet in place when it is placed in the slot.

[0008] As a more specific embodiment of the above implementation, the main elastic component includes: a main base, a main elastic member, and a main actuating part, wherein the main elastic member is located between the main base and the main actuating part, and its two ends are fixedly connected to the main base and the main actuating part respectively; the main base is fixed to the side of the main connecting groove opposite to the main open side; the main actuating part is configured to partially extend out of the main channel. This main elastic component enables in-situ fixation of the protective sheet.

[0009] As a more specific embodiment of the above-described solution, a first main limiting portion is formed on the main open side of the main connecting groove, and a second main limiting portion is disposed on the main working portion to cooperate with the first main limiting portion, thereby limiting the main working portion in the extension direction of the main elastic member. The second main limiting portion is a transverse protrusion disposed on the outer surface of the main working portion. This configuration optimizes the original resting position of the main working portion, preventing it from excessively protruding into the slot and obstructing the insertion of the protective sheet when in its original resting position.

[0010] As a more specific embodiment of the above-described method, the lateral protrusions are symmetrically arranged on two opposing outer surfaces of the main working part. This paired arrangement of the first main limiting part and the main protrusions allows for a more balanced definition of the original static position of the main working part.

[0011] As a more specific embodiment of the above-described method, the main functional part further includes a main platform step on the surface in contact with the protective sheet to support the protective sheet. This main platform step prevents the protective sheet from falling off.

[0012] As a further embodiment of the above-described solution, the installation area further includes an auxiliary connecting groove, which is located adjacent to the positioning hole; the connecting channel further includes an auxiliary channel extending from a first auxiliary channel opening to a second auxiliary channel opening, wherein the first auxiliary channel opening is formed on the auxiliary open side of the auxiliary connecting groove, and the second auxiliary channel opening is formed on the second side of the slot opposite to the first side, and the slot and the auxiliary connecting groove are connected through the auxiliary channel; the force-applying mechanism further includes an auxiliary elastic component, which is disposed in the auxiliary connecting groove and partially extends out of the auxiliary channel, for abutting against the protective sheet when the protective sheet is placed in the slot, so as to apply pressure to the protective sheet to fix it in place. Through the main connecting groove, the main channel and the main elastic component, as well as the auxiliary connecting groove, the auxiliary channel and the auxiliary elastic component, pressure can be applied to the two opposite sides of the protective sheet, thereby making the fixation of the protective sheet more secure.

[0013] As a specific embodiment of the above-described method, the auxiliary elastic component includes: an auxiliary base, an auxiliary elastic member, and an auxiliary actuating part. The auxiliary elastic member is located between the auxiliary base and the auxiliary actuating part, and its two ends are fixedly connected to the auxiliary base and the auxiliary actuating part, respectively. The auxiliary base is fixed to the side of the auxiliary connecting groove opposite to the auxiliary open side. The auxiliary actuating part is configured to partially extend through the auxiliary channel. By combining this auxiliary elastic component with the main elastic component, a more stable in-situ fixation of the protective sheet can be achieved.

[0014] As a specific embodiment of the above implementation, the auxiliary open side of the auxiliary connecting groove forms a first auxiliary limiting portion, and the auxiliary working portion is provided with a second auxiliary limiting portion that cooperates with the first auxiliary limiting portion to limit the auxiliary working portion in the extension direction of the auxiliary elastic member. The second auxiliary limiting portion is a transverse protrusion arranged on the outer surface of the auxiliary working portion. This configuration optimizes the original resting position of the auxiliary working portion, preventing it from excessively protruding into the slot and obstructing the insertion of the protective sheet when in its original resting position.

[0015] As a further embodiment of the above-described solution, the auxiliary actuating part further comprises an auxiliary platform step for supporting the protective sheet on the surface in contact with the protective sheet, and the auxiliary connecting groove, the auxiliary channel, and the auxiliary elastic component are arranged in pairs on both sides of the positioning hole in the transverse direction. This auxiliary platform step, together with the main platform step, can further prevent the protective sheet from falling off, and a more stable in-situ fixation of the protective sheet can be achieved through one main elastic component and two auxiliary elastic components.

[0016] The beneficial effects of this utility model are as follows: This invention, by setting a main connecting groove, a main channel, and a main elastic component on the basis of an existing protective sheet fixture, can fix the protective sheet in place by applying pressure to it through the main channel when it is placed in the slot, thus preventing the protective sheet from shifting in the slot or even flying out of the slot during the transfer of the fixture.

[0017] This invention optimizes the original static position of the functional part by setting a limiting part on the connecting groove and a matching limiting part on the functional part, so that the functional part does not protrude excessively into the slot when in the original static position, thus preventing the insertion of the protective sheet.

[0018] This invention prevents the protective plate from accidentally falling off by setting a platform step on the functional part.

[0019] This invention, by setting a main elastic component and two auxiliary elastic components, can apply pressure to the two opposite sides of the protective sheet, thereby making the protective sheet more securely fixed. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of a fixture for assembling protective sheets for lithium-ion batteries, based on existing technology.

[0021] Figure 2 This is a schematic diagram of the fixture for assembling the protective sheet of a lithium-ion battery according to the present invention, without the protective sheet being inserted.

[0022] Figure 3 This is a schematic diagram of the fixture for assembling a lithium-ion battery according to the present invention, with the protective sheet inserted.

[0023] The labels in the schematic diagram are as follows: 1. Slot; 2. Positioning hole; 3. Positioning end; 4. Main connecting slot; 5. Main channel; 51. First main channel opening; 52. Second main channel opening; 61. Main base; 62. Main elastic component; 63. Main action part; 64. Main platform step; 7. Auxiliary connecting slot; 8. Auxiliary channel; 91. Auxiliary base; 92. Auxiliary elastic component; 93. Auxiliary action part; 11. First main limiting part; 12. Second main limiting part; 13. Protective plate. Detailed Implementation

[0024] See Figure 2 and Figure 3 In one embodiment of the present invention, a fixture for assembling protective sheets for lithium-ion batteries is provided. The fixture includes a slot 1, a positioning hole 2 and a positioning end 3 in its longitudinal direction. The positioning hole 2 is located in the middle of the fixture, the positioning end 3 is located at both ends of the fixture, and the slot is located between the positioning hole 2 and the positioning end 3.

[0025] The fixture also includes an installation area adjacent to the slot; a force-applying mechanism installed in the installation area; and a connecting channel connecting the installation area and the slot, wherein when the protective sheet is placed into the slot, the force-applying mechanism applies pressure to the protective sheet through the connecting channel to fix the protective sheet in place.

[0026] In one embodiment of this utility model, the installation area includes a main connecting groove 4, which is disposed between the slot 1 and the positioning end 3; the connecting channel includes a main channel 5, which extends from a first main channel opening 51 to a second main channel opening 52, wherein the first main channel opening 51 is formed on the main open side of the main connecting groove 4, and the second main channel opening 52 is formed on the first side of the slot 1, and the slot 1 and the main connecting groove 4 are connected through the main channel 5; the force-applying mechanism includes a main elastic component, which is disposed in the main connecting groove 4 and partially extends out of the main channel 5, and is used to abut against the protective sheet 13 through the main channel 5 when the protective sheet 13 is located in the slot 1, so as to apply pressure to the protective sheet 13 to fix it in place, specifically, the pressure is longitudinal pressure. According to this embodiment of this utility model, by setting the main connecting groove, the main channel and the main elastic component on the basis of the existing protective sheet fixture, the main elastic component can apply pressure to the protective sheet 13 through the main channel 5 to fix the protective sheet in place when it is placed in the slot.

[0027] In one embodiment of this utility model, the main elastic component includes: a main base 61, a main elastic member 62, and a main actuating part 63. The main elastic member 62 is located between the main base 61 and the main actuating part 63, and both ends of the main elastic member 62 are fixedly connected to the main base 61 and the main actuating part 63, respectively, so that an outward force can be applied to the main actuating part 63 when the main elastic member 62 is compressed. An example of the main elastic member 62 is a spring. The main base 61 is fixed to the side of the main connecting groove 4 opposite to the main open side. The main actuating part 63 is configured to partially extend through the main channel 5. When the protective sheet 13 is placed in the slot 1, one side of the main actuating part 63 contacts the protective sheet 13 to apply a fixing pressure. With this main elastic component configured in this way, the protective sheet can be fixed in situ.

[0028] In one embodiment of this utility model, a first main limiting part 11 is formed on the main open side of the main connecting groove 4, and a second main limiting part 12 that cooperates with the first main limiting part 11 is disposed on the main working part 63 to limit the main working part 63 in the extension direction of the main elastic member 62. In one embodiment, the second main limiting part 12 is a transverse protrusion arranged on the outer surface of the main working part 63. Through the interaction between the fixed first main limiting part 11 of the main connecting groove 4 and the second main limiting part 12 on the movable main working part 63, the original static position of the main working part 63 can be optimized so that the main working part 63 does not protrude excessively into the slot 1 when in the original static position, thus preventing the insertion of the protective sheet 13. It should be noted that the original static position of the main working part 63 here refers to the position of the main working part 63 when the protective sheet is not inserted.

[0029] In one embodiment of this invention, the lateral protrusions are symmetrically arranged on two opposite outer surfaces of the main working part 63. This paired arrangement of the lateral protrusions allows for a more balanced definition of the original resting position of the main working part 63.

[0030] In one embodiment of the present invention, the main working part 63 also has a main platform step 64 for supporting the protective sheet 13 on the side that contacts the protective sheet 13, thereby preventing the protective sheet 13 from falling off accidentally.

[0031] In one embodiment of the present invention, the mounting area of ​​the fixture for assembling the protective sheet of the lithium-ion battery further includes an auxiliary connecting groove 7, which is disposed adjacent to the positioning hole 2; the communicating channel of the fixture for assembling the protective sheet of the lithium-ion battery further includes an auxiliary channel 8, which extends from a first auxiliary channel opening 81 to a second auxiliary channel opening 82, wherein the first auxiliary channel opening 81 is formed on the auxiliary open side of the auxiliary connecting groove 7, and the second auxiliary channel opening 82 is formed on the second side of the slot 1 opposite to the first side, and the slot 1 and the auxiliary connecting groove 7 are connected through the auxiliary channel 8; the force-applying mechanism of the fixture for assembling the protective sheet of the lithium-ion battery further includes an auxiliary elastic component, which is disposed in the auxiliary connecting groove 7 and is used to abut against the protective sheet 13 when the protective sheet 13 is located in the slot 1, so as to apply pressure to the protective sheet 13 to fix the protective sheet 13 in place. By using the main connecting groove, main channel, and main elastic component, as well as the auxiliary connecting groove, auxiliary channel, and auxiliary elastic component, pressure can be applied to the two opposite sides of the protective sheet, thereby making the protective sheet more securely fixed.

[0032] In one embodiment of this utility model, the auxiliary elastic component has a substantially similar composition to the main elastic component, including: an auxiliary base 91, an auxiliary elastic member 92, and an auxiliary action part 93. The auxiliary elastic member 92 is located between the auxiliary base 91 and the auxiliary action part 93, and both ends of the auxiliary elastic member 92 are fixedly connected to the auxiliary base 91 and the auxiliary action part 93, respectively, so that when the auxiliary elastic member 92 is compressed, it can impart an outward force to the auxiliary action part 93. An example of the auxiliary action part 93 is a spring. The auxiliary base 91 is fixed to the side of the auxiliary connecting groove 7 opposite to the auxiliary open side. The auxiliary action part 93 is configured to partially extend through the auxiliary channel 8. When the protective sheet 13 is placed in the slot 1, one side of the auxiliary action part 93 contacts the protective sheet 13 to apply a fixing pressure. Through this auxiliary elastic component, combined with the main elastic component, a more stable in-situ fixation of the protective sheet can be achieved.

[0033] In one embodiment of this utility model, similar to the main connecting groove 4, the auxiliary connecting groove 7 has a first auxiliary limiting portion formed on its auxiliary open side. The auxiliary working part 93 is provided with a second auxiliary limiting portion that cooperates with the first auxiliary limiting portion to limit the auxiliary working part 93 in the extension direction of the auxiliary elastic member. The second auxiliary limiting portion is a transverse protrusion arranged on the outer surface of the auxiliary working part 93. Preferably, the transverse protrusions are symmetrically arranged on two opposite outer surfaces of the auxiliary working part 93. This configuration optimizes the original resting position of the auxiliary working part 93, preventing it from excessively protruding into the slot and hindering the insertion of the protective sheet when in its original resting position.

[0034] In one embodiment of the present invention, the auxiliary part 93 also has an auxiliary platform step 94 for supporting the protective sheet 13 on the surface in contact with the protective sheet 13, thereby further preventing the protective sheet from falling off together with the main platform step 64.

[0035] In a preferred embodiment of this invention, the auxiliary connecting groove 7, the auxiliary channel 8, and the auxiliary elastic component are arranged in pairs on both sides of the positioning hole 2 in the transverse direction. This allows for a more secure in-situ fixation of the protective sheet 13 using one main elastic component and two auxiliary elastic components.

[0036] The present application and its embodiments have been described above illustratively. This description is not restrictive, and the accompanying drawings are only one embodiment of the present application. The actual structure is not limited to this. Therefore, if a person skilled in the art is inspired by this description and designs a similar structure and embodiment without departing from the spirit of the present application, such design should fall within the protection scope of the present application.

Claims

1. A jig for assembling a protection sheet of a lithium ion battery, comprising a clamping groove (1), a positioning hole (2) and a positioning end (3) in the longitudinal direction of the jig, wherein the positioning hole (2) is arranged in the middle of the jig, the positioning end (3) is arranged at both ends of the jig, and the clamping groove (1) is arranged between the positioning hole (2) and the positioning end (3), characterized in that, Also includes: The installation area is set adjacent to the card slot (1); The force-applying mechanism is installed in the installation area; A connecting channel connects the installation area to the card slot (1). When the protective sheet is placed into the slot (1), the force-applying mechanism applies pressure to the protective sheet through the connecting channel to fix the protective sheet in place.

2. The fixture for assembling protective sheets for lithium-ion batteries according to claim 1, characterized in that, The installation area includes a main connecting groove (4), which is located between the card slot (1) and the positioning end (3); The connecting channel includes a main channel (5), which extends from a first main channel opening (51) to a second main channel opening (52). The first main channel opening (51) is formed on the main open side of the main connecting groove (4), and the second main channel opening (52) is formed on the first side of the slot (1). The slot (1) and the main connecting groove (4) are connected through the main channel (5). The force-applying mechanism includes a main elastic component, which is disposed in the main connecting groove (4) and partially extends out of the main channel (5) to abut against the protective sheet when the protective sheet is placed in the slot (1) to apply pressure to the protective sheet to fix it in place.

3. The fixture for assembling protective sheets for lithium-ion batteries according to claim 2, characterized in that, The main elastic component includes: a main base (61), a main elastic component (62), and a main action part (63), wherein the main elastic component (62) is located between the main base (61) and the main action part (63), and its two ends are fixedly connected to the main base (61) and the main action part (63) respectively; the main base (61) is fixed to the side of the main connecting groove (4) opposite to the main open side; the main action part (63) is configured to partially extend out of the main channel (5).

4. The fixture for assembling protective sheets for lithium-ion batteries according to claim 3, characterized in that, The main open side of the main connecting groove (4) forms a first main limiting part (11), and the main working part (63) is provided with a second main limiting part (12) that cooperates with the first main limiting part (11) to limit the main working part (63) in the extension direction of the main elastic member (62). The second main limiting part (12) is a transverse protrusion arranged on the outer surface of the main working part (63).

5. The fixture for assembling protective sheets for lithium-ion batteries according to claim 4, characterized in that, The lateral protrusions are symmetrically arranged on two opposite outer surfaces of the main working part (63).

6. The fixture for assembling protective sheets for lithium-ion batteries according to claim 5, characterized in that, The main working part (63) also has a main platform step (64) for supporting the protective sheet on the surface that contacts the protective sheet.

7. The fixture for assembling protective sheets for lithium-ion batteries according to claim 2, characterized in that, The installation area also includes an auxiliary connecting groove (7), which is located adjacent to the positioning hole (2); The connecting channel also includes an auxiliary channel (8), which extends from the first auxiliary channel opening to the second auxiliary channel opening. The first auxiliary channel opening is formed on the auxiliary open side of the auxiliary connecting groove (7), and the second auxiliary channel opening is formed on the second side of the slot (1) opposite to the first side. The slot (1) and the auxiliary connecting groove (7) are connected through the auxiliary channel (8). The force-applying mechanism also includes an auxiliary elastic component, which is disposed in the auxiliary connecting groove (7) and partially extends out of the auxiliary channel (8) to abut against the protective sheet when the protective sheet is placed in the slot (1) to apply pressure to the protective sheet to fix it in place.

8. The fixture for assembling protective sheets for lithium-ion batteries according to claim 7, characterized in that, The auxiliary elastic component includes: an auxiliary base (91), an auxiliary elastic member (92), and an auxiliary action part (93), wherein the auxiliary elastic member (92) is located between the auxiliary base (91) and the auxiliary action part (93), and its two ends are fixedly connected to the auxiliary base (91) and the auxiliary action part (93) respectively; the auxiliary base (91) is fixed to the side of the auxiliary connecting groove (7) opposite to the auxiliary open side; the auxiliary action part (93) is configured to partially extend out of the auxiliary channel (8).

9. The fixture for assembling protective sheets for lithium-ion batteries according to claim 8, characterized in that, The auxiliary open side of the auxiliary connecting groove (7) forms a first auxiliary limiting part, and the auxiliary action part (93) is provided with a second auxiliary limiting part that cooperates with the first auxiliary limiting part to limit the auxiliary action part (93) in the extension direction of the auxiliary elastic member (92). The second auxiliary limiting part is a transverse protrusion arranged on the outer surface of the auxiliary action part (93).

10. The fixture for assembling protective sheets for lithium-ion batteries according to claim 9, characterized in that, The auxiliary part (93) also has an auxiliary platform step for supporting the protective sheet on the surface in contact with the protective sheet, and the auxiliary connecting groove (7), the auxiliary channel (8) and the auxiliary elastic component are arranged in pairs on both sides of the positioning hole (2) in the transverse direction.

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