Lamination mold for preparing lamination battery cell

Abstract

The lamination mold comprises a base, a clamp, a negative limiting plate and a positive limiting plate, a plurality of first limiting protrusions and second limiting protrusions are arranged on the two sides of the base at intervals respectively, and second grooves used for taking the battery cells are formed in the positions, between the adjacent second limiting protrusions, of the top of the base. The other two sides of the base are each provided with a clamp, and the bottoms of the other two sides of the base are each provided with a first groove used for containing the corresponding clamp. The negative limiting plate and the positive limiting plate are placed at the top of the base, one end of the negative limiting plate and one end of the positive limiting plate abut against the first limiting protrusions respectively, and pole piece limiting protrusions are arranged at the tops of one end of the negative limiting plate and one end of the positive limiting plate respectively; and avoiding grooves are correspondingly formed in the middle parts of the sides close to the clamps. According to the utility model, the pole piece limiting plate and the diaphragm are limited through the first limiting bulge and the second limiting bulge, the negative pole piece and the positive pole piece are limited through the pole piece limiting bulge, and the pole pieces and the diaphragm are fixed through the clamp, so that accurate lamination of a single diaphragm and a coiled diaphragm can be met at the same time; the method is simple, reliable and efficient, can improve the qualified rate and the consistency of the battery lamination, and has good practicability.

Description

Technical Field

[0001] The utility model belongs to the technical field of laminated electric core moulds, and in particular relates to a laminated electric core mould for preparing laminated electric cores. Background Art

[0002] In recent years, driven by the development of lithium-ion batteries and related industries, the research and industrial application of sodium-ion batteries, lithium metal batteries, lithium-sulfur batteries, and all-solid-state batteries have made good progress. Among them, in the experimental research stage, the production of battery cells often adopts the stacking method, and the stacking is divided into automatic stacking by machine and manual stacking. Due to various factors or restrictions, it is often necessary to manually stack the batteries during the experiment.

[0003] However, the manual stacking method not only requires high skills from the operator, but also easily causes the positive and negative poles or diaphragms to be offset during the stacking process, resulting in poor alignment of the positive and negative poles and diaphragms of the battery cell. Especially when the number of stacking layers is very large and manual stacking operations need to be performed in a glove box, the stacking difficulty will be very high and the probability of problems will be very high, ultimately resulting in poor consistency, low yield and low quality of the battery cells.

[0004] The existing patent CN207800798U discloses a lamination mold for making lithium-sulfur batteries. The mold consists of a first groove for placing the battery body, a second groove for placing the positive electrode ear, a third groove for placing the negative electrode ear, and a fourth groove for removing the battery. The position of the pole piece is limited by limiting the position of the pole piece by the second groove and the third groove, thereby controlling the alignment of the positive and negative pole pieces during the lamination process. However, in the actual process, the pole pieces of the positive and negative pole pieces are often copper foil or aluminum foil of 6 to 20 microns, so the pole pieces of the positive and negative pole pieces are very soft and thin. It is not easy to limit the position of the pole piece by limiting the position of the pole piece by limiting the position of the pole piece by the groove in the actual lamination process. In addition, this method cannot solve the problem of manual lamination alignment in complex situations (multi-layer number, glove box). Therefore, a lamination mold that is still simple, reliable, and efficient in complex situations is needed, so that it can reduce the difficulty of manual lamination while ensuring the alignment and consistency of the battery cell. Utility Model Content

[0005] The utility model aims to provide a lamination mold for preparing a laminated battery core, aiming to solve the above-mentioned problem.

[0006] The utility model is mainly realized through the following technical solutions:

[0007] A stacking mold for preparing stacked battery cells comprises a base, a clamp, a negative limit plate and a positive limit plate, wherein a plurality of first limit protrusions and a second limit protrusion are arranged at intervals on both sides of the base, a second groove for taking out the battery cell is arranged on the top of the base between adjacent second limit protrusions, the other two sides of the base are arranged with clamps, and the bottom of the other two sides are arranged with first grooves for placing the clamps; the negative limit plate and the positive limit plate are respectively placed on the top of the base, one end of the negative limit plate and the positive limit plate are respectively abutted against the first limit protrusion, the top of one end of the negative limit plate and the positive limit plate are respectively provided with pole piece limit protrusions, and avoidance grooves are respectively arranged in the middle of one side close to the clamp.

[0008] In order to better realize the utility model, it further includes a diaphragm limiting plug plate, and the two ends of the other two sides of the top of the base are respectively plugged with diaphragm limiting plug plates, and an avoidance opening for placing the clamp is provided between adjacent diaphragm limiting plug plates on the same side.

[0009] In order to better realize the utility model, further, a slot is provided at the top of the base corresponding to the diaphragm limiting plug plate.

[0010] In order to better realize the utility model, further, a circular hole is provided in the middle of the diaphragm limiting plug plate.

[0011] In order to better implement the utility model, further, adjacent first grooves are arranged through, and a second groove is arranged on the top of the base along the length direction and extends outward from the middle.

[0012] In order to better implement the present utility model, further, the first groove and the second groove are connected and intersected.

[0013] In order to better implement the present utility model, further, the other ends of the negative limit plate and the positive limit plate pass through the space between adjacent second limit protrusions and extend outward.

[0014] In order to better realize the utility model, further, the negative limit plate and the positive limit plate are respectively F-shaped structures.

[0015] In order to better realize the utility model, further, a first limit baffle, a second limit baffle and a third limit baffle are arranged at intervals along the length direction on one side of the base, and a fourth limit baffle and a fifth limit baffle are arranged at intervals along the length direction on the opposite side.

[0016] The beneficial effects of the utility model are as follows:

[0017] The stacking mold of the utility model has multiple limiting and positioning functions, which can ensure the stacking accuracy in complex environments and improve the yield and efficiency of stacking. The utility model limits the pole piece limiting plate and the diaphragm through the first limiting protrusion and the second limiting protrusion, limits the negative pole piece and the positive pole piece through the pole piece limiting protrusion, and fixes the pole piece and the diaphragm through the clamp, which can simultaneously meet the precise stacking of single-piece diaphragms and rolled diaphragms, achieve simple, reliable and efficient, and improve the qualified rate and consistency of battery stacking, and has good practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the lamination mold of the utility model;

[0019] Figure 2 is a schematic diagram of the structure of the base;

[0020] Figure 3 It is a structural schematic diagram of the negative limit plate;

[0021] Figure 4 It is the structural schematic diagram of the positive limit plate;

[0022] Figure 5 is a schematic diagram of the structure of the fixture;

[0023] Figure 6 It is a structural schematic diagram of the diaphragm limit plug plate;

[0024] Figure 7 Flow chart for completing a single diaphragm stack for securing pole pieces and diaphragms;

[0025] Figure 8 Flow chart for completing rolled diaphragm stack for securing pole pieces.

[0026] Among them: 1-base, 2-negative limit plate, 3-positive limit plate, 4-clamp, 5-diaphragm limit plug, 6-first limit protrusion, 7-second limit protrusion, 8-pole piece limit protrusion, 9-avoidance groove, 102-first limit baffle, 103-second limit baffle, 104-third limit baffle, 105-fourth limit baffle, 106-fifth limit baffle, 107-first groove, 108-second groove, 109-slot. DETAILED DESCRIPTION

[0027] Embodiment 1:

[0028] A lamination mold for preparing laminated battery cells, comprising a base 1, a pole piece limit plate, a diaphragm limit plug plate 5 and a clamp 4, wherein the pole piece limit plate comprises a negative limit plate 2 and a positive limit plate 3, so as to cope with the lamination work of rolled diaphragms, single-piece diaphragms, single-piece battery cells, multi-layer battery cells, etc. in various complex environments. A plurality of first limiting protrusions 6 and second limiting protrusions 7 are respectively arranged at intervals on both sides of the base 1, and a second groove 108 for taking out the battery cell is arranged on the top of the base 1 between adjacent second limiting protrusions 7, and a clamp 4 is respectively arranged on the other two sides of the base 1, and a first groove 107 for placing the clamp 4 is respectively arranged on the bottom of the other two sides; the negative limit plate 2 and the positive limit plate 3 are respectively placed on the top of the base 1, and one end of the negative limit plate 2 and the positive limit plate 3 are respectively abutted against the first limiting protrusion 6, and the top of one end of the negative limit plate 2 and the positive limit plate 3 are respectively provided with a pole piece limiting protrusion 8, and an avoidance groove 9 is respectively arranged in the middle of the side close to the clamp 4.

[0029] Preferably, if Figure 1-Figure 4 As shown, the top of the base 1 is used to place the battery body, and the first limiting baffle 102, the second limiting baffle 103 and the third limiting baffle 104, the fourth limiting baffle 105 and the fifth limiting baffle 106 are respectively arranged on both sides of the top for limiting the electrode limiting plate and the diaphragm, and the bottom of one side of the top is provided with a first groove 107 for placing the clamp 4, and the top of the other side is provided with a second groove 108 for taking the battery cell, and the other two ends of the top are respectively provided with a plurality of slots 109 corresponding to the diaphragm limiting plug plate 5. Preferably, the two narrow sides of the top plane of the base 1 are sequentially distributed with the first limiting baffle 102 to the third limiting baffle 104 and the fourth limiting baffle 105 to the fifth limiting baffle 106 in the vertical direction, and the plane where the first limiting baffle 102 to the third limiting baffle 104 is located is parallel to the plane where the fourth limiting baffle 105 to the fifth limiting baffle 106 is located.

[0030] Preferably, if Figure 2 As shown, the first groove 107 passes through the middle position of the two long sides in the thickness direction of the top plane, but does not pass through the top plane. The second groove 108 passes through the middle position of the side where the fourth to fifth limit baffles 106 are located in the thickness direction of the top plane, passes through the top plane but does not pass through the plane where the first to third limit baffles 104 are located. The slots 109 are evenly distributed on both sides of the length direction of the top plane, and may or may not pass through the base 1.

[0031] like Figure 3 and Figure 4As shown, the pole piece limiting plate is divided into a positive limiting plate 3 and a negative limiting plate 2, the top of the negative limiting plate 2 is used to place the negative pole piece, and one end is provided with a pole piece limiting protrusion 8 for limiting the negative pole piece, and the middle portion corresponding to the clamp 4 is provided with an avoidance groove 9; the top of the positive limiting plate 3 is used to place the positive pole piece, and one end is provided with a pole piece limiting protrusion 8 for limiting the positive pole piece, and the middle portion corresponding to the clamp 4 is provided with an avoidance groove 9.

[0032] like Figure 5 As shown, the clamp 4 is an auxiliary module, which is used to fix the battery cells during the lamination process to prevent the pole pieces and diaphragms from shifting due to operation.

[0033] like Figure 6 As shown, the diaphragm limiting plug plate 5 is an auxiliary module, which is a plug plate with a central opening and is used to limit the position of a single diaphragm. The hole in the middle position is convenient for inserting and removing the module.

[0034] The utility model performs manual lamination of battery cells based on the lamination mold, specifically comprising the following steps:

[0035] 1) Place the base 1 on a flat surface;

[0036] 2) placing the diaphragm on the plane at the top of the base 1 and matching the position with the base 1;

[0037] 3) Place the negative limit plate 2 on the diaphragm and match its position with the base 1;

[0038] 4) placing the negative electrode plate on the negative limit plate 2 and matching the position with the negative limit plate 2;

[0039] 5) Place the diaphragm and match the position with the pole piece and base 1;

[0040] 6) Fix the position of the pole piece and the diaphragm with the clamp 4, and then take out the negative limit plate 2;

[0041] 7) Place the positive limit plate 3 on the diaphragm and match its position with the base 1;

[0042] 8) placing the positive electrode plate on the positive limit plate 3 and matching the position with the positive limit plate 3;

[0043] 9) Place the diaphragm and match the position with the pole piece and base 1;

[0044] 10) Fix the position of the pole piece and the diaphragm with the clamp 4, and then take out the clamp 4 and the positive limit plate 3 fixed on the previous layer;

[0045] 11) Repeat all or part of the steps 3) to 10) to complete the stacking of the battery cells.

[0046] The stacking mold of the utility model has multiple limiting and positioning functions, which can ensure the stacking accuracy in complex environments, improve the yield and efficiency of stacking, and achieve simplicity, reliability, and efficiency while improving the qualified rate and consistency of battery stacking. The material of the stacking mold of the utility model can be low-cost materials such as polytetrafluoroethylene, which is convenient for stacking batteries of different sizes and models. The stacking mold of the utility model can simultaneously meet the precise stacking of single-piece diaphragms and rolled diaphragms, and has good practicality.

[0047] Embodiment 2:

[0048] A stacking mold for preparing a stacked battery cell includes a base 1, a negative limit plate 2, a positive limit plate 3, a clamp 4 and a diaphragm limit plug 5. A sodium battery soft pack battery cell is made by using a positive electrode sheet of 83*65mm, a negative electrode sheet of 86*67mm, and a single glass fiber diaphragm of 90*70mm and 260um thick. Correspondingly, a first limit baffle 102, a second limit baffle 103 and a third limit baffle 104 are arranged at intervals on one side of the base 1, and a fourth limit baffle 105 and a fifth limit baffle 106 are arranged at intervals on the opposite side. The limit baffles on both sides are parallel to each other and the spacing between them is the length of the diaphragm. Slots 109 are respectively arranged at both ends of the other two sides of the top of the base 1. The four slots 109 are arranged in pairs, and the spacing between adjacent slots 109 in the horizontal direction is the width of the diaphragm.

[0049] Insert the diaphragm limiting plug plate 5 into the two slots 109 on one side of the base 1 to complete the limiting of the diaphragm. Then, the negative limiting plate 2 is matched with the second limiting baffle 103 and the fifth limiting baffle 106 to fix the position of the negative limiting plate 2, and then the long side of the negative pole piece is flush with the side of the avoidance groove 9 of the negative limiting plate 2, and the ear side of the negative pole piece is flush with the pole piece limiting protrusion 8, so as to achieve the limiting of the negative pole piece. The limiting method of the positive pole piece is the same as that of the negative pole piece, and the position of the pole piece and the diaphragm is fixed by the clamp 4 during the stacking process to avoid displacement of the pole piece and the diaphragm due to operation, and the stacking process of the battery cell is completed by repeatedly using the negative limiting plate 2, the positive limiting plate 3, and the clamp 4. Figure 7 As shown, the specific lamination includes the following steps:

[0050] ① Place the base 1 on a flat surface;

[0051] ② Place the single glass fiber diaphragm on the base 1 and match the base 1 and the diaphragm limiting plug plate 5;

[0052] ③ Place the negative limit plate 2 on the single glass fiber diaphragm and match its position with the base 1;

[0053] ④ Place the negative electrode sheet on the negative limit plate 2 and match the position with the negative limit plate 2;

[0054] ⑤ Place the single glass fiber diaphragm on the negative electrode and match the position with the base 1 and the diaphragm limiting plug plate 5;

[0055] ⑥ The clamp 4 matches the first groove 107 and the avoidance groove 9 and fixes the position of the pole piece and the diaphragm;

[0056] ⑦ Take out the negative limit plate 2 from the other side of the fixture 4;

[0057] ⑧ Place the positive limit plate 3 on the single glass fiber diaphragm and match its position with the base 1;

[0058] ⑨ Place the positive electrode on the positive limit plate 3 and match the position with the positive limit plate 3;

[0059] ⑩ Place the single glass fiber diaphragm on the positive electrode and match the position with the base 1 and the diaphragm limiting plug plate 5;

[0060] The clamp 4 matches the first groove 107 and the avoidance groove 9 and fixes the position of the pole piece and the diaphragm;

[0061] Take out the positive limit plate 3 from the other side of the fixture 4;

[0062] Cycle step ③~ Complete the stacking of multi-layer battery cells.

[0063] Embodiment 3:

[0064] A lamination mold for preparing a laminated battery cell comprises a base 1, a negative limit plate 2, a positive limit plate 3 and a fixture 4. A lithium battery soft pack battery cell is made by using a positive electrode sheet of 83*65mm, a negative electrode sheet of 86*67mm, and a rolled ceramic diaphragm with a width of 90mm and a thickness of 16μm. Compared with Example 2, the diaphragm limit plate 5 is cancelled. Correspondingly, a first limit baffle 102, a second limit baffle 103 and a third limit baffle 104 are arranged at intervals on one side of the base 1, and a fourth limit baffle 105 and a fifth limit baffle 106 are arranged at intervals on the opposite side. The limit baffles on both sides are parallel to each other and the spacing between them is the width of the ceramic diaphragm. The negative limit plate 2 is matched with the second limit baffle 103 and the fifth limit baffle 106 to fix the position of the negative limit plate 2, and then the long side of the negative pole piece is flush with the side of the avoidance groove 9 of the negative limit plate 2, and the ear side of the negative pole piece is flush with the pole piece limit protrusion 8, so as to achieve the limitation of the negative pole piece. The limitation of the positive pole piece is the same as that of the negative pole piece, and the position of the pole piece and the diaphragm is fixed by the clamp 4 during the lamination process to avoid the displacement of the pole piece and the diaphragm by operation, and the lamination process of the battery cell is completed by repeatedly using the negative limit plate 2, the positive limit plate 3, and the clamp 4.

[0065] like Figure 8 As shown, the specific lamination includes the following steps:

[0066] ① Place the base 1 on a flat surface;

[0067] ② Place the ceramic diaphragm on the base 1 and match the position with the base 1;

[0068] ③ Place the negative limit plate 2 on the ceramic diaphragm and match its position with the base 1;

[0069] ④ Place the negative electrode on the negative limit plate 2 and match the position with the electrode limit protrusion 8;

[0070] ⑤ The clamp 4 matches the first groove 107 and the avoidance groove 9 and fixes the position of the pole piece;

[0071] ⑥ Take out the negative limit plate 2 from the other side of the fixture 4;

[0072] ⑦ Fold the ceramic diaphragm onto the negative electrode sheet and match the position with the base 1, then the clamp 4 matches the position with the first groove 107 and the avoidance groove 9 and fixes the position of the electrode sheet and the diaphragm;

[0073] ⑧ Place the positive limit plate 3 on the ceramic diaphragm and match its position with the base 1;

[0074] ⑨ Place the positive electrode on the positive limit plate 3 and match the position with the positive limit plate 3;

[0075] ⑩Take out the positive limit plate 3 from the other side of the fixture 4;

[0076] The ceramic diaphragm is folded over the positive electrode sheet and matched with the base 1, and then the clamp 4 is matched with the first groove 107 and the avoidance groove 9 to fix the position of the electrode sheet and the diaphragm;

[0077] Loop ③~ The steps are to complete the lamination of multi-layer battery cells.

[0078] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Any simple modification or equivalent changes made to the above embodiments based on the technical essence of the present invention shall fall within the protection scope of the present invention.

Claims

1. A lamination mold for preparing a laminated battery core, characterized in that: The invention comprises a base (1), a clamp (4), a negative limit plate (2) and a positive limit plate (3); a plurality of first limit protrusions (6) and a second limit protrusion (7) are arranged at intervals on both sides of the base (1); a second groove (108) for taking out a battery cell is arranged on the top of the base (1) between adjacent second limit protrusions (7); the other two sides of the base (1) are arranged with clamps (4), and the bottoms of the other two sides are arranged with first grooves (107) for placing the clamps (4); the negative limit plate (2) and the positive limit plate (3) are respectively placed on the top of the base (1); one end of the negative limit plate (2) and the positive limit plate (3) are respectively abutted against the first limit protrusion (6); the tops of one end of the negative limit plate (2) and the positive limit plate (3) are respectively provided with pole piece limit protrusions (8), and avoidance grooves (9) are respectively arranged in the middle of the side close to the clamp (4).

2. A lamination mold for preparing a laminated battery core according to claim 1, characterized in that: It also includes a diaphragm limiting plug plate (5), and the two ends of the other two sides of the top of the base (1) are respectively plugged with a diaphragm limiting plug plate (5), and an avoidance opening for placing the clamp (4) is provided between adjacent diaphragm limiting plug plates (5) on the same side.

3. A lamination mold for preparing a laminated battery core according to claim 2, characterized in that: A slot (109) is provided at the top of the base (1) corresponding to the diaphragm limiting plug plate (5).

4. A lamination mold for preparing a laminated battery core according to claim 2, characterized in that: A circular hole is provided in the middle of the diaphragm limiting plug plate (5).

5. A lamination mold for preparing a laminated battery core according to claim 1, characterized in that: Adjacent first grooves (107) are arranged through-through, and a second groove (108) is arranged on the top of the base (1) along the length direction and extends outward from the middle.

6. A lamination mold for preparing a laminated battery core according to claim 5, characterized in that: The first groove (107) and the second groove (108) are intersecting with each other.

7. A lamination mold for preparing a laminated battery core according to claim 1, characterized in that: The other ends of the negative limit plate (2) and the positive limit plate (3) pass through the space between adjacent second limit protrusions (7) and extend outward.

8. A lamination mold for preparing a laminated battery core according to claim 7, characterized in that: The negative limit plate (2) and the positive limit plate (3) are respectively F-shaped structures.

9. A lamination mold for preparing a laminated battery core according to claim 1, characterized in that: A first limit baffle (102), a second limit baffle (103) and a third limit baffle (104) are arranged at intervals along the length direction on one side of the base (1), and a fourth limit baffle (105) and a fifth limit baffle (106) are arranged at intervals along the length direction on the opposite side.

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