Auxiliary bundling tool and battery cell bundling equipment

Abstract

The utility model discloses an auxiliary binding tool and battery cell binding equipment, and relates to the technical field of lithium battery production equipment, the auxiliary binding tool comprises a base, a limiting assembly and a sliding strip assembly; the limiting assembly is mounted on the base and is provided with a battery cell groove for accommodating the square-shell battery cell; the sliding strip assembly is arranged at the bottom of the battery cell groove and is used for supporting one side, provided with the battery cell pole column, of the square-shell battery cell; according to the technical scheme, the limiting assembly is arranged in the auxiliary binding tool, the limiting assembly is installed on the base and provided with the battery cell groove, the battery cell groove is used for containing the square-shell battery cells, and the square-shell battery cells are stacked in the battery cell groove in order so that the flatness of the outer surfaces of the square-shell battery cells can be improved; a sliding strip assembly is arranged at the bottom of the square-shell battery cell, and the side, arranged on the battery cell pole column, of the square-shell battery cell is supported through the sliding strip assembly, so that the risk of short circuit caused by contact between the battery cell pole column and a strapping machine is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of lithium battery production equipment, and particularly relates to an auxiliary bundling tooling for bundling electric core bundles, that is, an electric core bundling device. Background Art

[0002] A lithium battery is a type of battery with lithium metal or lithium alloy as the positive / negative electrode material and using a non-aqueous electrolyte solution. Due to the very active chemical properties of lithium metal, the processing, storage, and use of lithium metal have very high requirements for the environment. With the development of science and technology, lithium batteries have become the mainstream. Lithium batteries are usually made by stacking and bundling a certain number of electric cores. Among them, some lithium batteries are made by stacking and bundling square shell electric cores. The square shell electric core has a flat and long outer contour and usually needs to be placed vertically and bundled by a bundling machine to form a module. In the existing square shell electric core bundling technology, there are defects such as low flatness of the stacked alignment of the electric core module and the risk of short circuit caused by the contact between the bundling machine and the electric core pole column. Summary of the Utility Model

[0003] The main purpose of the utility model is to propose an auxiliary bundling tooling and an electric core bundling device, aiming to improve the flatness of the square shell electric core module and avoid the risk of short circuit of the electric core caused by the contact between the bundling machine and the pole column.

[0004] To achieve the above object, the auxiliary bundling tooling proposed by the utility model is used to assist in bundling square shell electric cores. One side of the square shell electric core has an electric core pole column. The auxiliary bundling tooling includes: a base, a limiting component, and a sliding bar component; the limiting component is installed on the base, and the limiting component has an electric core groove for accommodating the square shell electric core; the sliding bar component is arranged at the bottom of the electric core groove, and the sliding bar component is used to support the side of the square shell electric core where the electric core pole column is provided.

[0005] In one embodiment, the limiting component includes a first limiting plate and a second limiting plate that are opposite and spaced apart along a first direction, and the electric core groove is formed between the first limiting plate and the second limiting plate.

[0006] In one embodiment, both the first limiting plate and the second limiting plate extend along a second direction. One end of the first limiting plate in the second direction is provided with a first limiting strip protruding towards the second limiting plate, and one end of the second limiting plate in the second direction is provided with a second limiting strip protruding towards the first limiting plate. The first limiting strip and the second limiting strip are arranged opposite to each other along the first direction, wherein the first direction intersects with the second direction.

[0007] In one embodiment, the height of the first limiting plate is greater than the height of the second limiting plate.

[0008] In one embodiment, it further includes a support assembly disposed on the base. The support assembly includes a first support member and a second support member. The first support member abuts against a side of the first limiting plate facing away from the second limiting plate, and the second support member abuts against a side of the second limiting plate facing away from the first limiting plate.

[0009] In one embodiment, the first support member extends from one end of the first limiting plate to the other end of the first limiting plate;

[0010] And / or, the second support member extends from one end of the second limiting plate to the other end of the second limiting plate.

[0011] In one embodiment, the slider assembly includes a plurality of sliders spaced along the width direction of the battery cell groove. Each slider extends along the length direction of the battery cell groove, and a guiding groove is formed between two adjacent sliders for accommodating a cable tie.

[0012] In one embodiment, the slider is made of an insulating material.

[0013] The present utility model further provides a battery cell bundling device, including: a bundling machine and the auxiliary bundling tooling according to any one of the above. The bundling machine has a bundling station for bundling the battery cell assembly, and the auxiliary bundling tooling is disposed at the bundling station.

[0014] In one embodiment, the battery cell assembly includes a battery cell module and end plates. The battery cell module includes a plurality of the square shell battery cells stacked along the length direction of the battery cell groove. The end plates are disposed at both ends of the battery cell module. The bundling machine bundles the battery cell assembly with a cable tie, and the welding point of the cable tie is disposed on a side of the battery cell assembly facing away from the battery cell pole.

[0015] The technical solution of the present utility model is to set a limiting assembly in the auxiliary bundling tooling for assisting in bundling square shell battery cells. The limiting assembly is installed on the base and has a battery cell groove for accommodating square shell battery cells. By neatly stacking a plurality of square shell battery cells in the battery cell groove, the flatness of the outer surface of the square shell battery cells is improved. Also, a slider assembly is provided at the bottom of the square shell battery cells to support the side of the square shell battery cells where the battery cell poles are located, avoiding the risk of short circuit caused by the contact between the battery cell poles and the bundling machine. Description of the Drawings

[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on the structures shown in these drawings.

[0017] Figure 1 Schematic diagram of the structure of an embodiment of the auxiliary bundling tooling provided by the present invention;

[0018] Figure 2 Schematic diagram of the structure of the auxiliary bundling tooling after placing the battery cell assembly provided by the present invention.

[0019] Explanation of the reference numerals in the drawings:

[0020] 100, auxiliary bundling tooling; 1, base; 2, limiting component; 21, first limiting plate; 22, second limiting plate; 23, first limiting strip; 24, second limiting strip; 3, slide bar component; 31, slide bar; 32, guiding groove; 4, supporting component; 41, first supporting member; 42, second supporting member;

[0021] 201, battery cell assembly; 202, end plate; 203, square shell battery cell.

[0022] The realization of the purpose, functional features and advantages of the present invention will be further described with reference to the embodiments and the drawings. Specific embodiments

[0023] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0024] It should be noted that if there are directional indications (such as up, down, left, right, front, back...) involved in the embodiments of the present invention, the directional indications are only used to explain the relative positional relationship and movement conditions between components in a specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0025] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the utility model, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of the features. In addition, if "and / or" or "and / or" appears in the full text, its meaning includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or solutions that satisfy both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the utility model.

[0026] Lithium batteries are a type of battery that uses lithium metal or lithium alloy as positive / negative electrode materials and non-aqueous electrolyte solutions. Due to the very active chemical properties of lithium metal, the processing, storage, and use of lithium metal have very high environmental requirements. With the development of science and technology, lithium batteries have become mainstream. Lithium batteries are usually made by stacking and bundling a certain number of battery cells. Among them, some lithium batteries are made by stacking and bundling square shell battery cells. The square shell battery cells have a flat and long outer contour and usually need to be placed vertically and bundled by a bundling machine to form a module. In the existing square shell battery cell bundling technology, the square shell battery cells are usually arranged vertically first, and then bundled by a bundling machine to bundle the battery cell module composed of the square shell battery cells more firmly. Since the center of gravity of the square shell battery cell assembly is higher when it is placed vertically, it is easy to collapse due to unstable center of gravity. Therefore, when multiple square shell battery cells are arranged vertically, it is usually difficult to arrange them neatly, and it is easy to have a low flatness in the stacking alignment of the battery cell modules. A cell pole is usually arranged on one vertical outer wall of the square shell battery cell, which makes the outer wall on this side uneven. In order to make the stacking arrangement more stable, the flatter side away from the cell pole is usually set as the bottom for arrangement. At this time, in the stacked battery module, the cell poles of the square shell battery cells are all set at the top of the module. In order to facilitate welding, the welding point after the cable tie is bundled is usually also set at the top of the battery module. At this time, it is easy for the metal parts of the strapping machine to touch the positive and negative poles of the cell poles at the same time during welding, thereby causing a short circuit.

[0027] The utility model provides an auxiliary bundling tool 100.

[0028] See also Figure 1-2, in an embodiment of the present utility model, the auxiliary bundling tooling 100 is used to assist in bundling the square shell battery cell 203. One side of the square shell battery cell 203 has a battery cell pole post. The auxiliary bundling tooling 100 includes: a base 1, a limiting component 2, and a sliding bar component 3; the limiting component 2 is installed on the base 1, and the limiting component 2 has a battery cell slot for accommodating the square shell battery cell 203; the sliding bar component 3 is arranged at the bottom of the battery cell slot, and the sliding bar component 3 is used to support the side of the square shell battery cell 203 where the battery cell pole post is located.

[0029] In this embodiment, the base 1 is used to support components such as the limiting component 2, the sliding bar component 3, and the square shell battery cell 203. The base 1 is a square bottom plate, and both the limiting component 2 and the sliding bar component 3 are installed above the bottom plate and can be fixed to the square bottom plate by welding or colloid adhesion. The limiting component 2 is used to limit and fix the square shell battery cell 203. A battery cell slot is opened in the limiting component 2, and the width of the battery cell slot is approximately equal to the width of the square shell battery cell 203, and the length is adjusted according to the number of battery cells to be arranged. As long as it is longer than the length after multiple battery cells are arranged and stacked. The sliding bar component 3 is arranged at the bottom of the battery cell slot and is used to support the side of the square shell battery cell 203 where the battery cell pole post is located. In this embodiment, since the limiting slot can limit the battery cell, even if the side of the square shell battery cell 203 where the pole post is located is set as the bottom for placement, the square shell battery cell 203 will not collapse due to the relatively uneven side wall. When the square shell battery cell 203 is placed in the battery cell slot, the battery cell pole post at the bottom of the square shell battery cell 203 can abut against the sliding bar component 3 or be inserted into the gap slot between the sliding bar components 3. The battery cell pole post always only contacts the sliding bar component 3 and will not contact the components of the bundling machine, thereby avoiding short circuits caused by the positive and negative poles of the battery cell pole post contacting metal components.

[0030] In this embodiment, in order to save production costs, the lengths of the limiting component 2 and the sliding bar component 3 are equal to the length of the base 1, so that the base 1 can fully support all components without exceeding too much in size. The limiting component 2 is fixedly installed on the base 1, and the sliding bar component 3 is fixedly installed in the installation slot of the limiting component 2. The square shell battery cells 203 are closely arranged and stacked in the battery cell slot along the length direction of the installation slot. Under the action of the battery cell slot, the square shell battery cells 203 can be stacked neatly and the outer surface is flatter. After stacking the square shell battery cells 203, a tie strap is wound around the periphery of the battery cell module, and the end of the tie strap is connected by welding to bind the tie strap to the battery cell module.

[0031] The technical solution of the present utility model is to set a limiting component 2 in the auxiliary bundling tooling 100 for assisting in bundling the square shell battery cell 203. The limiting component 2 is installed on the base 1 and has a battery cell groove for accommodating the square shell battery cell 203. By neatly stacking a plurality of square shell battery cells 203 in the battery cell groove, the flatness of the outer surface of the square shell battery cell 203 is improved. Also, a slide bar component 3 is set at the bottom of the square shell battery cell 203. The slide bar component 3 supports one side of the square shell battery cell 203 where the battery cell pole is located. When a plurality of square shell battery cells 203 are stacked, the battery cell pole can be located at the bottom of the battery cell and contact the slide bar component 3, thus avoiding the risk of short circuit caused by the battery cell pole being easily in contact with the bundling machine when it is located at the top.

[0032] In one embodiment, the limiting component 2 includes a first limiting plate 21 and a second limiting plate 22 that are opposite and spaced apart along a first direction. A battery cell groove is formed between the first limiting plate 21 and the second limiting plate 22. The first limiting plate 21 and the second limiting plate 22 are perpendicularly arranged above the bottom plate. To fit the outer contour of the battery cell module composed of the square shell battery cells 203, the first limiting plate 21 and the second limiting plate 22 are parallel and spaced apart. The area enclosed by the first limiting plate 21, the second limiting plate 22, and the bottom plate forms the battery cell groove. In other embodiments, the limiting component 2 may also include a first limiting plate 21, a second limiting plate 22, and a third limiting plate that are integrally arranged. The third limiting plate is arranged between the first limiting plate 21 and the second limiting plate 22, that is, the first limiting plate 21, the second limiting plate 22, and the third limiting plate are arranged in a U shape. The area enclosed by the first limiting plate 21, the second limiting plate 22, and the third limiting plate forms the battery cell groove. Then, the integrally arranged limiting component 2 is installed on the bottom plate, which can also limit the square shell battery cell 203 and facilitate the stacking of the square shell battery cells 203. At this time, the slide bar component 3 is arranged on the third limiting plate. With such a setting, it is convenient to replace the bottom plate when the bottom plate is damaged, and the limiting component 2 together with the internal battery cell module can be picked up at the same time.

[0033] In one embodiment, both the first limiting plate 21 and the second limiting plate 22 extend along the second direction. At one end of the first limiting plate 21 in the second direction, there is a first limiting strip 23 protruding towards the second limiting plate 22. At one end of the second limiting plate 22 in the second direction, there is a second limiting strip 24 protruding towards the first limiting plate 21. The first limiting strip 23 and the second limiting strip 24 are arranged opposite to each other along the first direction, wherein the first direction intersects with the second direction. In this embodiment, the first direction is the width direction of the installation groove, and the second direction is the length direction of the installation groove. The first limiting strip 23 and the second limiting strip 24 are used to cooperate to limit the positions of the square shell battery cell 203 and its end plate 202, preventing the square shell battery cell 203 and its end plate 202 from falling out of the battery cell groove from the end of the battery cell groove. The width of the battery cell groove is equal to the width of the square shell battery cell 203. After the square shell battery cell 203 or the end plate 202 is placed in the battery cell groove, the two side walls in its width direction can just abut against the first limiting plate 21 and the second limiting plate 22 or only leave a very small gap. The first limiting strip 23 and the second limiting strip 24 are arranged at the same end of the first limiting plate 21 and the second limiting plate 22. At this time, due to the arrangement of the first limiting strip 23 and the second limiting strip 24, the width of the battery cell groove at this position is reduced and smaller than the width of the square shell battery cell 203 or the end plate 202, and neither the square shell battery cell 203 nor the end plate 202 can pass through between the first limiting strip 23 and the second limiting strip 24, so they cannot fall out of the battery cell groove. When stacking the square shell battery cells 203, first lean the end plate 202 against the first limiting strip 23 and the second limiting strip 24, then stack the battery cells along the length direction of the battery cell groove. After stacking the preset number, set another end plate 202 at the end, and the battery cells can be stacked neatly to complete the arrangement and stacking of the battery cell module.

[0034] In one embodiment, the height of the first limiting plate 21 is greater than the height of the second limiting plate 22. Since the first limiting plate 21 is higher than the second limiting plate 22, after the first limiting plate 21 and the second limiting plate 22 are both vertically fixed to the bottom plate, the side wall of the battery cell groove formed between the first limiting plate 21 and the second limiting plate 22 near the second limiting plate 22 will be lower than the other side wall. A notch is formed above the side wall of the battery cell groove near the second limiting plate 22. This notch can facilitate the placement of the square shell battery cell 203 into the battery cell groove. Before placing the square shell battery cell 203, first lean one side of the square shell battery cell 203 in the width direction against the first limiting plate 21, and then slide it down along the first limiting plate 21 into the battery cell groove, and the square shell battery cell 203 can be quickly placed into the battery cell groove without being stuck by the second limiting plate 22.

[0035] In one embodiment, it further includes a support assembly 4 provided on the base 1. The support assembly 4 includes a first support member 41 and a second support member 4231. The first support member 41 abuts against the side of the first limiting plate 21 facing away from the second limiting plate 22, and the second support member 4231 abuts against the side of the second limiting plate 22 facing away from the first limiting plate 21. The first support member 41 is used to support the first limiting plate 21 from the side of the first limiting plate 21 facing away from the second limiting plate 22, and the second support member 4231 is used to support the second limiting plate 22 from the side of the second limiting plate 22 facing away from the first limiting plate 21. By providing the support assembly 4, the stability of the first limiting plate 21 and the second limiting plate 22 can be improved, so as to prevent the cell assembly 201 from toppling the limiting plates on both sides when it contacts the first limiting plate 21 and the second limiting plate 22.

[0036] In one embodiment, the first support member 41 extends from one end of the first limiting plate 21 to the other end of the first limiting plate 21; and / or, the second support member 4231 extends from one end of the second limiting plate 22 to the other end of the second limiting plate 22. In this embodiment, both the first support member 41 and the second support member 4231 are long rectangular strips, and are arranged along the root parts of the first limiting plate 21 and the second limiting plate 22. In other embodiments, the support member can also be a plurality of support blocks arranged at intervals, or a support column obliquely supported on the outer wall surface of the limiting plate.

[0037] In one embodiment, the slide bar assembly 3 includes a plurality of slide bars arranged at intervals in the width direction of the cell slot. Each slide bar extends in the length direction of the cell slot. A guiding groove 32 is formed between two adjacent slide bars. The guiding groove 32 is used to accommodate the cable tie. The cable tie is placed in the guiding groove 32 and passes through both ends of the guiding groove 32. The guiding groove 32 can guide the cable tie, preventing the relatively soft cable tie from not being unfolded, resulting in insecure bundling of the cable tie to the cell.

[0038] In one embodiment, the slide bar is made of an insulating material. Using an insulating material for the slide bar can effectively prevent current from flowing through the surface of the slide bar. Thus, when the square shell cell 203 is placed above the slide bar and the cell terminal touches the slide bar, problems such as leakage and short - circuit of the square shell cell 203 can be avoided. The insulating material of the slide bar can be made of polymer, rubber, fiber, resin, etc., as long as it can play an insulating role.

[0039] Refer to Figure 2The utility model also proposes a battery cell bundling device, which includes a bundling machine and an auxiliary bundling tool 100. The specific structure of the auxiliary bundling tool 100 refers to the above-mentioned embodiment. Since the battery cell bundling device adopts all the technical solutions of all the above-mentioned embodiments, it at least has all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be repeated here. Among them, the bundling machine has a bundling station for bundling battery cell assemblies 201, and the auxiliary bundling tool 100 is arranged at the bundling station. When in use, the auxiliary bundling tool 100 is placed on the bundling station, and then the cable tie is placed in the cable tie guide groove 32, and then the square shell battery cells 203 are stacked and arranged on the bundling station, and then the stacked square shell battery cells 203 are bundled with cable ties by the bundling machine to complete the bundling of the square shell battery cells 203.

[0040] In one embodiment, the cell assembly 201 includes a cell module and an end plate 202, the cell module includes a plurality of square shell cells 203 stacked and arranged along the length direction of the cell slot, the end plates 202 are arranged at both ends of the cell module, and the strapping machine straps the cell assembly 201 with a cable tie, and the welding point of the cable tie is arranged on the side of the cell assembly 201 away from the cell pole. The end plate 202 can keep the square shell cell 203 in the correct position through a tight connection to ensure the stability of the square shell cell 203 in the cell module. When strapping the square shell cell 203, first place the end plate 202 against the first limit bar 23 and the second limit bar 24, then arrange and stack the plurality of square shell cells 203 in sequence along the length direction of the cell slot, and then tie them up with a cable tie, and the two ends of the cable tie are welded to the side of the cell module away from the cell pole, so that the cell pole will not be touched during welding to avoid short circuit.

[0041] The above description is only an exemplary embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the technical concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. An auxiliary bundling tooling for assisting in bundling square shell battery cells, one side of the square shell battery cell has a cell pole column, and it is characterized in that, The auxiliary strapping tool comprises: Base; A limiting assembly is installed on the base, and the limiting assembly has a cell slot for accommodating the square shell cell; and A slide bar assembly is arranged at the bottom of the battery cell slot, and the slide bar assembly is used to support the side of the square shell battery cell where the battery cell pole is arranged.

2. The auxiliary bundling tooling according to claim 1, wherein The limiting assembly includes a first limiting plate and a second limiting plate that are arranged opposite to each other and spaced apart along a first direction, and the battery cell slot is formed between the first limiting plate and the second limiting plate.

3. The auxiliary bundling tooling according to claim 2, wherein The first limiting plate and the second limiting plate are both extended along the second direction, the first limiting plate is provided with a first limiting strip protruding toward the second limiting plate at one end in the second direction, the second limiting plate is provided with a second limiting strip protruding toward the first limiting plate at one end in the second direction, the first limiting strip and the second limiting strip are arranged opposite to each other along the first direction, wherein the first direction intersects with the second direction.

4. The auxiliary bundling tooling according to claim 2, wherein The height of the first limiting plate is greater than the height of the second limiting plate.

5. The auxiliary bundling tooling according to claim 2, characterized in that, It also includes a support assembly arranged on the base, the support assembly includes a first support member and a second support member, the first support member abuts against a side of the first limit plate away from the second limit plate, and the second support member abuts against a side of the second limit plate away from the first limit plate.

6. The auxiliary bundling tooling according to claim 5, wherein, The first support member extends from one end of the first limiting plate to the other end of the first limiting plate; And / or, the second support member extends from one end of the second limiting plate to the other end of the second limiting plate.

7. The auxiliary bundling tooling according to any one of claims 1 to 6, characterized in that The slide bar assembly includes a plurality of slide bars spaced apart along the width direction of the battery cell slot, each of the slide bars extending along the length direction of the battery cell slot, and a guide groove is formed between two adjacent slide bars for accommodating a cable tie.

8. The auxiliary bundling tooling according to claim 7, characterized in that, The sliding bar is made of insulating material.

9. A battery cell bundling device, characterized in that, include: A strapping machine and the auxiliary strapping tool as claimed in any one of claims 1 to 8, wherein the strapping machine has a strapping station for strapping battery cell components, and the auxiliary strapping tool is arranged at the strapping station.

10. The battery cell bundling device according to claim 9, characterized in that, The battery cell assembly includes a battery cell module and an end plate. The battery cell module includes a plurality of square shell batteries stacked along the length direction of the battery cell slot. The end plates are arranged at both ends of the battery cell module. The strapping machine straps the battery cell assembly with a cable tie. The welding point of the cable tie is arranged on the side of the battery cell assembly away from the battery cell pole.

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