Battery cell winding system and cylindrical battery
By designing a battery cell winding system including a hollow structure core and a propulsion mechanism, the problem of cylindrical battery core collapse during the cycle is solved, and the battery performance improvement and production efficiency optimization are achieved.
Patent Information
- Application Number
- CN202420625179.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-28
- Publication Date
- 2025-03-25
- Estimated Expiration
- 2034-03-28
AI Technical Summary
The coiled cores of existing cylindrical batteries are prone to collapse during the cycle, resulting in a degradation of battery performance, and the existing battery cell winding equipment cannot meet the production needs of anti-collapse.
A battery cell winding system is designed, including a hollow core, a propulsion mechanism and a clamping assembly. The propulsion mechanism drives the core and the coil to reciprocate, thereby realizing clamping and winding of the coil to avoid collapse.
By winding the core body and the coil material together, a core with a support structure is formed, which significantly improves the service life of the battery and prevents collapse during the cycle.
Smart Images
Figure CN222673068U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of battery production, in particular to a battery core winding system and a cylindrical battery. Background Art
[0002] The cores of existing cylindrical batteries are mostly formed by winding the positive electrode sheet, the negative electrode sheet and the separator. However, as the cylindrical battery is used, the interior of the core will gradually deteriorate, especially at the end of the cycle, which is often accompanied by the collapse of the core structure and rapid deterioration.
[0003] However, most of the existing battery cell winding equipment is designed based on winding positive and negative electrodes and separators, and thus cannot adapt to the production of anti-collapse cylindrical batteries.
[0004] Therefore, there is an urgent need to provide a battery cell winding system and a cylindrical battery to solve the problems existing in the prior art to a certain extent. Utility Model Content
[0005] The utility model aims to provide a battery cell winding system and a cylindrical battery, so as to optimize the battery cell winding system to a certain extent, improve the structural strength of the formed winding core, and avoid the problem of structural collapse during the battery cell cycle.
[0006] The utility model provides a battery core winding system, including a winding mechanism, a propulsion mechanism, a core body and a coil; a positioning groove penetrating through two ends of the core body is formed along the axial direction of the core body, one end of the core body is detachably connected to the propulsion mechanism, and the propulsion mechanism can reciprocate along a first direction to push the core body to move along the first direction; the winding mechanism is formed with a clamping assembly, the coil is connected to the clamping assembly, and the clamping assembly corresponds to the positioning groove, so that the coil can enter the positioning groove.
[0007] The core body is made of steel material, and a through hole is formed at the center of the core body. The through hole penetrates the core body along the axial direction of the core body, so that the core body has a hollow structure.
[0008] Specifically, the propulsion mechanism includes a driving member and a propulsion member; the propulsion member includes a connecting section and an expansion section, one end of the connecting section is connected to the driving end of the driving member, and the expansion section is connected to the other end of the connecting section, the diameter of the expansion section is smaller than the diameter of the connecting section, and the diameter of the expansion section is adapted to the inner diameter of the perforation, so that the expansion section can be inserted into the perforation.
[0009] Furthermore, the battery cell winding system provided by the utility model also includes an inflation component, which includes a first air source and an air storage component, a first air channel is formed in the connecting section and the expansion section, two ends of the first air channel are respectively connected to the first air source and the air storage component, and the diameter of the air storage component in the inflated state is larger than the inner diameter of the perforation.
[0010] A positioning hole is formed at one end of the core body facing the propulsion mechanism, and a plurality of matching parts are distributed circumferentially on the expansion section, one of the matching parts can pass through the positioning hole and protrude from the outer wall surface of the core body.
[0011] Specifically, the number of the positioning holes is two, the two positioning holes are relatively arranged on two sides of the positioning groove, and the distances between the two positioning holes and the positioning groove are the same.
[0012] Furthermore, the battery core winding system provided by the utility model further includes a detection component, and the detection component corresponds to detecting the matching portion passing through the positioning hole.
[0013] Wherein, the clamping assembly includes a winding needle and a base, the winding needle is connected to the base, and the winding needle forms a clamping space for clamping the coiled material.
[0014] Specifically, a tensioning assembly is provided on the base, and the tensioning assembly can enter the through hole and expand to connect the clamping assembly with the core body.
[0015] Compared with the prior art, the battery core winding system provided by the utility model has the following advantages:
[0016] The utility model provides a battery cell winding system, comprising a winding mechanism, a propulsion mechanism, a core body and a coil; a positioning groove penetrating through two ends of the core body is formed along the axial direction of the core body, one end of the core body is detachably connected to the propulsion mechanism, and the propulsion mechanism can reciprocate along a first direction to push the core body to move along the first direction; the winding mechanism is formed with a clamping assembly, the coil is connected to the clamping assembly, and the clamping assembly corresponds to the positioning groove, so that the coil can enter the positioning groove.
[0017] From this analysis, it can be seen that the clamping assembly formed by the winding mechanism can achieve the clamping of the coil. Since the core body in this application is detachably connected to the driving end of the propulsion mechanism, the core body can be driven to reciprocate in the first direction through the propulsion mechanism. In actual operation, the core body can be pushed to move in the direction close to the coil through the propulsion mechanism.
[0018] Since a positioning groove is formed on the core body along the axial direction of the core body and passes through both ends of the core body, and the clamping assembly corresponds to the positioning groove, when the propulsion mechanism pushes the core body forward, the coil can gradually enter the positioning groove, and when the core body is fully in place, the coil can fully enter the positioning groove, and then the core body is separated from the propulsion mechanism. Finally, the coil and the core body are driven to rotate through the rotation of the winding mechanism, thereby achieving the purpose of winding the coil on the core body.
[0019] It can be understood that since the battery cell winding system provided in the present application can wind the core body and the coil together, so that the core body is supported in the final formed coil, the problem of collapse during the cycle process can be avoided to a certain extent.
[0020] In addition, the utility model also provides a cylindrical battery produced by using the above-mentioned battery cell winding system, including a coil, a core body and a shell, the coil is wound on the core body to form a winding core, and the winding core is arranged in the shell.
[0021] In the cylindrical battery produced by the battery cell winding system provided in the present application, there is a winding core including a core body, so that after the winding core is loaded into the shell and finally forms a battery, the service life of the cylindrical battery can be improved and the collapse problem during the cycle can be prevented. BRIEF DESCRIPTION OF THE DRAWINGS
[0022] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.
[0023] Figure 1 A schematic diagram of the structure of a battery core winding system provided in an embodiment of the utility model;
[0024] Figure 2 A schematic diagram of the structure of a cylindrical battery provided by an embodiment of the utility model;
[0025] Figure 3 A schematic structural diagram of a core body of a cylindrical battery provided in an embodiment of the utility model.
[0026] In the figure: 1-core; 101-positioning groove; 102-positioning hole; 2-coil; 3-base; 301-coil needle; 4-propelling member; 401-connecting section; 402-expansion section; 4021-matching part; 5-gas storage member; 6-shell;
[0027] S1 - first direction. DETAILED DESCRIPTION
[0028] To make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. The components of the embodiments of the present application generally described and shown in the drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the application claimed for protection, but merely represents the selected embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without making creative work belong to the scope of protection of the present application.
[0029] In the description of the embodiments of the present application, it should be noted that the terms "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or are the positions or positional relationships in which the utility model product is usually placed when in use. They are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the utility model. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.
[0030] In addition, the terms "horizontal", "vertical" and the like do not mean that the components are required to be absolutely horizontal or suspended, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.
[0031] In the description of the embodiments of the present application, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "setting", "installation", "connection", and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.
[0032] As used herein, the term "and / or" includes any one of the associated listed items and any combination of any two or more items.
[0033] For ease of description, spatial relative terms such as "above", "upper", "below", and "lower" may be used herein to describe the relationship of one element to another element as shown in the drawings. Such spatial relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the drawings.
[0034] The terms used herein are only used to describe various examples and are not used to limit the present disclosure. Unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. The terms "include", "comprise" and "have" list the stated features, quantities, operations, components, elements and / or their combinations that exist, but do not exclude the existence or addition of one or more other features, quantities, operations, components, elements and / or their combinations.
[0035] Variations in the shapes shown in the drawings may occur due to manufacturing techniques and / or tolerances. Therefore, the examples described herein are not limited to the specific shapes shown in the drawings but include variations in shapes that occur during manufacturing.
[0036] The features of the examples described herein may be combined in various ways that will be apparent after understanding the disclosure of the present application. In addition, although the examples described herein have various configurations, other configurations are possible as will be apparent after understanding the disclosure of the present application. In addition, the technical solutions between the various embodiments may be combined with each other, but must be based on the ability of ordinary technicians in the field to implement. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be considered that the combination of such technical solutions does not exist and is not within the scope of protection required by the present application.
[0037] like Figure 1 As shown, the utility model provides a battery core winding system, including a winding mechanism, a propulsion mechanism, a core body 1 and a coil 2; a positioning groove 101 penetrating through both ends of the core body 1 is formed along the axial direction of the core body 1, one end of the core body 1 is detachably connected to the propulsion mechanism, and the propulsion mechanism can reciprocate along a first direction S1 to push the core body 1 to move along the first direction S1; the winding mechanism is formed with a clamping assembly, the coil 2 is connected to the clamping assembly, and the clamping assembly corresponds to the positioning groove 101, so that the coil 2 can enter the positioning groove 101.
[0038] Compared with the prior art, the battery core winding system provided by the utility model has the following advantages:
[0039] The battery cell winding system provided by the utility model can clamp the coil 2 through the clamping assembly formed by the winding mechanism. Since the core body 1 in the present application is detachably connected to the driving end of the propulsion mechanism, the core body 1 can be driven to reciprocate in the first direction S1 through the propulsion mechanism. In actual operation, the core body 1 can be pushed to move in the direction close to the coil 2 through the propulsion mechanism.
[0040] Since a positioning groove 101 is formed on the core body 1 and passes through both ends of the core body 1 along the axial direction of the core body 1, and the clamping assembly corresponds to the positioning groove 101, when the pushing mechanism pushes the core body 1 forward, the coil 2 can gradually enter the positioning groove 101, and when the core body 1 is fully in place, the coil 2 can fully enter the positioning groove 101, and then the core body 1 is separated from the pushing mechanism. Finally, the winding mechanism is rotated to drive the coil 2 and the core body 1 to rotate, thereby achieving the purpose of winding the coil 2 on the core body 1.
[0041] It can be understood that since the battery cell winding system provided in the present application can wind the core 1 and the coil 2 together, so that the core 1 is supported in the final formed coil, the problem of collapse during the cycle can be avoided to a certain extent.
[0042] It should be noted here that the detachable connection between the core body 1 and the propulsion mechanism in the present application can be achieved in a variety of ways, such as by processing threads on the outer wall surface of the driving end of the propulsion mechanism and forming threads on the perforated inner wall surface of the core body 1, and realizing the connection between the propulsion mechanism and the core body 1 through thread matching. Accordingly, when the core body 1 is transported into place, the propulsion mechanism and the core body 1 can be separated by rotating the propulsion mechanism.
[0043] However, since this method requires processing the core 1 and the propulsion mechanism, and the propulsion mechanism needs to be rotated to achieve separation after the core 1 is in place, the processing difficulty and operation difficulty are increased. Therefore, a groove can be formed on the core 1 in the present application, and a spring plunger structure is provided at the position corresponding to the groove on the propulsion mechanism. When the groove is aligned with the spring plunger, the ball of the spring plunger is inserted into the groove to achieve the combination of the core 1 and the propulsion mechanism. When the core 1 is transported to the place, the core 1 can be connected to the winding mechanism first, and then the propulsion mechanism can be pulled out to achieve the separation of the propulsion mechanism and the core 1.
[0044] It is understandable that if Figure 2 Combination Figure 3 As shown, the core body 1 in the present application is made of steel material, and a through hole is formed in the center of the core body 1. The through hole penetrates the core body 1 along the axial direction of the core body 1, so that the core body 1 has a hollow structure.
[0045] Since the core 1 needs to be wound with the coil 2 and finally formed into a cylindrical battery, and the cylindrical battery needs to be filled with electrolyte, the present application can form the core 1 into a hollow structure by forming a perforation in the center of the core 1. In addition, since a positioning groove 101 is also formed on the core 1, and the positioning groove 101 in the present application is connected with the perforation, the flow of the electrolyte can be guaranteed, thereby ensuring the energy efficiency of the battery.
[0046] Alternatively, if Figure 2 As shown, the propulsion mechanism in the present application includes a driving member and a propulsion member 4; the propulsion member 4 includes a connecting section 401 and an expansion section 402, one end of the connecting section 401 is connected to the driving end of the driving member, and the expansion section 402 is connected to the other end of the connecting section 401, the diameter of the expansion section 402 is smaller than the diameter of the connecting section 401, and the diameter of the expansion section 402 is adapted to the inner diameter of the perforation, so that the expansion section 402 can be inserted into the perforation.
[0047] The present application forms an abutment surface by making the diameter of the expansion section 402 smaller than the diameter of the connection section 401, thereby enabling the core to be pushed. In order to achieve the connection between the core body 1 and the propulsion mechanism of the present application, a circular slot can be formed on the connection section 401 at a position corresponding to the core body 1, and a spring plunger can be arranged in the slot, and multiple spring plungers can be arranged along the circumference of the slot. When the end of the core body 1 is inserted into the slot, it can cooperate with the spring plunger, thereby achieving the above-mentioned locking state.
[0048] Preferably, if Figure 2 As shown, the battery cell winding system provided by the utility model also includes an inflation component, the inflation component includes a first air source and an air storage component 5, a first air channel is formed in the connecting section 401 and the expansion section 402, the two ends of the first air channel are respectively connected to the first air source and the air storage component 5, and the diameter of the air storage component 5 in the inflated state is larger than the inner diameter of the perforation.
[0049] By connecting the air storage component 5 at the end of the expansion section 402 and forming a first air channel in the expansion section 402 and the connection section 401, the air storage component 5 can be inflated and deflated by connecting with the first air source through the first air channel.
[0050] When the core 1 needs to be positioned, gas is injected into the gas storage member 5 so that the gas storage member 5 can be expanded. Since the diameter of the expanded gas storage member 5 in the present application is larger than the inner diameter of the perforation, the core 1 can be positioned and locked.
[0051] When it is necessary to separate the propulsion mechanism from the core body 1 , the gas in the gas storage member 5 can be released to shrink the gas storage member 5 , thereby unlocking the core body 1 and completing the separation of the core body 1 from the propulsion mechanism.
[0052] It is understandable that, since in actual operation, the positioning groove 101 of the core body 1 needs to be rotated to an upward direction to achieve docking with the coil, in the present application, a positioning hole 102 is formed at one end of the core body 1 facing the propulsion mechanism, and a plurality of matching parts 4021 are distributed circumferentially on the expansion section 402, one of which can pass through the positioning hole 102 and protrude from the outer wall surface of the core body 1.
[0053] The matching part 4021 in the present application is the elastic plunger mentioned above, but in the present embodiment, the matching part 4021 adopts an air column structure, that is, a plurality of cylindrical airbags are arranged in the circumferential direction of the expansion section 402, and the cylindrical airbags and the air storage part 5 are inflated at the same time. Since a positioning hole 102 is formed on the core body 1, the cylindrical airbag can pass through the positioning hole 102 to realize the positioning of the core body 1.
[0054] It should be noted here that a plurality of tubular positioning seats can be formed on the expansion section 402 in the present application. In a non-connected state, the airbag is contracted in the positioning seat. When the core body 1 is mounted on the expansion section 402, the positioning seat can be used to achieve preliminary alignment with the positioning hole 102. Thereafter, the airbag is expanded by inflation, thereby enabling the airbag to pass through the positioning hole 102 to achieve the above-mentioned positioning function.
[0055] Further preferably, the number of the positioning holes 102 in the present application is two, the two positioning holes 102 are relatively arranged on both sides of the positioning groove 101, and the distances between the two positioning holes 102 and the positioning groove 101 are the same.
[0056] Since the core body 1 needs to be rotated so that the positioning groove 101 faces upward, two opposite positioning holes 102 are provided on both sides of the positioning groove 101, and the distances between the two positioning holes 102 and the positioning groove 101 are the same, so that the direction of the positioning groove 101 can be accurately determined. After determining the direction, the core body 1 can achieve the purpose of the positioning groove 101 facing upward with the shortest rotation distance.
[0057] It can be understood that the battery cell winding system provided by the present invention further includes a detection component, and the detection component corresponds to detecting the matching portion 4021 passing through the positioning hole 102.
[0058] The detection component in the present application can adopt an image sensor, through which the matching part 4021 passing through the positioning hole 102 can be clearly known, so that the direction and distance that the core body 1 should rotate can be set according to the position of the matching part 4021 obtained by the image sensor, and then the purpose of the positioning groove 101 facing upward can be achieved by rotating the propulsion mechanism.
[0059] It should be noted here that the propulsion mechanism in the present application can adopt a telescopic structure such as a cylinder or an oil cylinder to realize reciprocating motion in the first direction S1. Taking the cylinder as an example, the present application can further set a motor at the end of the driving end of the cylinder, and connect the output end of the motor to the connecting section 401, so that the connecting section 401 can be extended and retracted through the cylinder, and the connecting section 401 can be rotated through the motor.
[0060] Alternatively, if Figure 2 As shown, the clamping assembly in the present application includes a winding needle 301 and a base 3 , the winding needle 301 is connected to the base 3 , and the winding needle 301 forms a clamping space for clamping the coil 2 .
[0061] The winding needle 301 in the present application includes two needle body structures, and the two needle body structures can move towards or away from each other, so as to achieve the reduction or expansion of the clamping space, and further achieve the clamping and release of the coil 2.
[0062] Optionally, a tensioning assembly is provided on the base 3 in the present application, and the tensioning assembly can enter the through hole and expand to connect the clamping assembly with the core 1 .
[0063] The tensioning assembly in the present application may include a second air source and a tensioning member, and a second flow channel connecting the second air source and the tensioning member may be formed on the base 3. When the core 1 is transported to a certain position, the tensioning member is located in the through hole of the core 1. The second air source is used to inflate the tensioning member to expand the tensioning member, thereby enabling the connection between the core 1 and the winding mechanism to be achieved.
[0064] Correspondingly, when the winding is completed, the gas in the tensioning member is recovered to cause the tensioning member to shrink, thereby achieving separation between the winding mechanism and the core body 1.
[0065] In addition, the utility model also provides a cylindrical battery produced by using the above-mentioned battery cell winding system, including a coil 2, a core body 1 and a shell 6, wherein the coil 2 is wound on the core body 1 to form a winding core, and the winding core is arranged in the shell 6.
[0066] In the cylindrical battery produced by the battery cell winding system provided in the present application, there is a winding core including a core body 1, so that after the winding core is loaded into the shell 6 and finally forms a battery, the service life of the cylindrical battery can be improved and the collapse problem during the cycle can be prevented.
[0067] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.
Claims
1. A battery cell winding system, characterized in that: It includes a winding mechanism, a propulsion mechanism, a core body and a coil; A positioning groove is formed along the axial direction of the core body and passes through both ends of the core body. One end of the core body is detachably connected to the propulsion mechanism, and the propulsion mechanism can reciprocate along a first direction to push the core body to move along the first direction. The winding mechanism is formed with a clamping assembly, the coil is connected to the clamping assembly, and the clamping assembly corresponds to the positioning groove, so that the coil can enter the positioning groove.
2. The battery core winding system according to claim 1, characterized in that: The core body is made of steel material, and a through hole is formed at the center of the core body. The through hole penetrates the core body along the axial direction of the core body, so that the core body has a hollow structure.
3. The battery core winding system according to claim 2, characterized in that: The propulsion mechanism comprises a driving member and a propulsion member; The propulsion member includes a connecting section and an expansion section, one end of the connecting section is connected to the driving end of the driving member, and the expansion section is connected to the other end of the connecting section. The diameter of the expansion section is smaller than the diameter of the connecting section, and the diameter of the expansion section is adapted to the inner diameter of the perforation so that the expansion section can be inserted into the perforation.
4. The battery core winding system according to claim 3, characterized in that: It also includes an inflation component, which includes a first air source and an air storage component. A first air channel is formed in the connecting section and the expansion section. The two ends of the first air channel are respectively connected to the first air source and the air storage component, and the diameter of the air storage component in the inflated state is larger than the inner diameter of the perforation.
5. The battery cell winding system according to claim 3, characterized in that: A positioning hole is formed at one end of the core body facing the propulsion mechanism, and a plurality of matching parts are distributed in the circumferential direction of the expansion section, one of the matching parts can pass through the positioning hole and protrude from the outer wall surface of the core body.
6. The battery cell winding system according to claim 5, characterized in that: The number of the positioning holes is two, and the two positioning holes are arranged oppositely on two sides of the positioning groove, and the distances between the two positioning holes and the positioning groove are the same.
7. The battery cell winding system according to claim 6, characterized in that: It also includes a detection component, which corresponds to detecting the matching portion passing through the positioning hole.
8. The battery cell winding system according to claim 2, characterized in that: The clamping assembly comprises a winding needle and a base. The winding needle is connected to the base. The winding needle forms a clamping space for clamping the coiled material.
9. The battery cell winding system according to claim 8, characterized in that: The base is provided with a tensioning assembly, which can enter the through hole and expand to connect the clamping assembly with the core body.
10. A cylindrical battery produced by using the battery winding system according to any one of claims 1 to 9, characterized in that: The invention comprises a coil, a core body and a shell body, wherein the coil is wound on the core body to form a winding core, and the winding core is arranged in the shell body.