A high-safety cylindrical battery structure
By placing the roll core in the cylinder of the cylindrical battery and passing it into the support column, combined with aluminum-plastic film packaging, the problem of existing batteries being prone to fire and explosion under the action of external forces is solved, and higher safety performance and protection effects are achieved.
Patent Information
- Application Number
- CN202420823523.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-19
- Publication Date
- 2025-04-11
- Estimated Expiration
- 2034-04-19
AI Technical Summary
The existing cylindrical soft-pack batteries can easily cause the internal structure of the coil core to break under the action of external forces, cause thermal runaway and may cause fire and explosion, and have a low safety factor.
Designing a high-security cylindrical battery structure includes forming an opening at one end of the cylinder, placing a core and forming a central hole in the center, placing a support cylinder, and covering an aluminum-plastic film on the outer circumference of the cylinder. The support column plays a supporting role in the inside of the roll core, and the cylinder provides protection to the outside of the roll core, improving the protection performance of the battery under external force impact.
By increasing the design of the support column and cylinder, the degree of deformation of the coil core after external force is extruded is effectively improved, internal fracture and external aluminum-plastic film rupture is prevented, the safety performance of the battery is improved, and the risk of fire and explosion is reduced.
Smart Images
Figure CN222749654U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the field of battery technology, and in particular to a high-safety cylindrical battery structure. Background Art
[0002] The structure of existing cylindrical soft-pack batteries is usually that the positive and negative electrodes and the separator are wound into a core, and then the core is encapsulated with an aluminum-plastic film. The thickness of the conventional aluminum-plastic film is only about 113u. Under the action of external force (extrusion or impact), the core will be directly subjected to force, resulting in the internal structure of the core being broken. The positive and negative electrodes of the core are in direct contact, resulting in thermal runaway, and then fire and explosion, with a low safety factor. Utility Model Content
[0003] In order to solve the above technical problems, the present application provides a high-safety cylindrical battery structure, including a cylinder with an opening formed at one end, a winding core placed in the cylinder, a center hole formed in the center of the winding core, a supporting column passing through the center hole, and an aluminum-plastic film covering and encapsulating the outer periphery of the cylinder.
[0004] Preferably, the supporting column is a solid cylinder.
[0005] Preferably, the thickness of the cylinder is 0.8-1.0 mm.
[0006] Preferably, the edge of the open end of the cylinder is chamfered.
[0007] Preferably, the diameter of the central hole is 2.0-3.0 mm.
[0008] Preferably, the diameter of the support column is 1.0 mm-1.5 mm.
[0009] Preferably, the edges of both end surfaces of the support column are chamfered.
[0010] Preferably, the barrel and the supporting column are made of any one of POM plastic, PAI plastic, PPS plastic and PEEK plastic.
[0011] As can be seen from the above, the following beneficial effects can be obtained by applying the present application: an opening is formed at one end of the cylinder, a winding core is placed in the cylinder, a center hole is formed in the center of the winding core, a support column is inserted in the center hole, and an aluminum-plastic film is coated on the outer periphery of the cylinder for packaging. The support column supports the inside of the winding core. By adding a support column inside the winding core, the deformation degree of the winding core after being squeezed by external force is effectively improved. The cylinder then protects the outside of the winding core, effectively preventing the winding core from breaking and deforming internally and the external aluminum-plastic film from rupturing after external force damage. Adding a cylinder outside the winding core improves the protection performance of the battery under external force impact, thereby improving safety performance and reducing the risk of fire and explosion. BRIEF DESCRIPTION OF THE DRAWINGS
[0012] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings required for use in the description of the embodiments of the present application or the prior art are briefly introduced below. Obviously, the drawings described below are only part of the embodiments of the present application, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative labor.
[0013] Figure 1 This is a schematic diagram of the high-safety cylindrical battery structure of an embodiment of the present application. DETAILED DESCRIPTION
[0014] The technical solutions in the embodiments of the present application will be described clearly and completely 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, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.
[0015] Example
[0016] In order to solve the above technical problems, this embodiment provides a high-safety cylindrical battery structure, such as Figure 1 As shown, it includes a cylinder 10 with an opening formed at one end, a winding core 20 placed in the cylinder 10, a center hole 21 is formed in the center of the winding core 20, a support column 30 is inserted in the center hole 21, and an aluminum-plastic film is coated on the periphery of the cylinder 10 for packaging. The support column 30 supports the inside of the winding core 20. By adding the support column 30 inside the winding core 20, the deformation degree of the winding core 20 after being squeezed by external force is effectively improved, and then the cylinder 10 protects the outside of the winding core 20, effectively preventing the winding core from breaking and deforming internally and the aluminum-plastic film from rupturing externally after being damaged by external force. Adding the cylinder 10 outside the winding core 20 improves the protection performance of the battery under external force impact, thereby improving the safety performance and reducing the risk of fire and explosion.
[0017] Specifically, in the above solution, the support column 30 is a solid cylinder, and the support column 30 is inserted into the circular center hole 21 of the winding core 20. When subjected to external force, the solid support column 30 prevents the winding core 20 from breaking and deforming inside and the aluminum-plastic film from breaking outside, thereby improving the protective effect.
[0018] Furthermore, this embodiment provides specific dimensions, the diameter of the support column 30 is 1.0mm-1.5mm, the diameter of the central hole 21 of the winding core 20 is 2.0-3.0mm, the thickness of the cylinder 10 is 0.8-1.0mm, and the support column 30 is inserted into the central hole 21 of the winding core 20, thereby playing the role of internal support. Compared with the existing winding core wrapped only with aluminum-plastic film, the winding core 10 of this embodiment has a higher safety performance through the cylinder 10 and the support column 30 as a protective structure.
[0019] The edge of the open end of the cylinder 10 is chamfered to prevent the edge of the cylinder 10 from piercing the core 20 and breaking the aluminum-plastic film when the core 20 is placed in the cylinder 10. At the same time, chamfers are formed on the edges of both end surfaces of the support column 30. When the support column 30 is inserted into the center hole 21, the edge of the support column 30 is prevented from scratching the core 20.
[0020] Furthermore, the material of the cylinder 10 and the support column 30 is any one of POM plastic, PAI plastic, PPS plastic and PEEK plastic. The above materials can withstand a high temperature of up to 200° C. and have the advantages of being resistant to electrolyte corrosion and having high strength.
[0021] In summary, the present application scheme forms an opening at one end of the cylinder, places a winding core in the cylinder, forms a center hole in the center of the winding core, inserts a support column in the center hole, and encapsulates the outer periphery of the cylinder by covering the aluminum-plastic film. The support column supports the inside of the winding core. By adding a support column inside the winding core, the deformation degree of the winding core after being squeezed by external force is effectively improved. The cylinder then protects the outside of the winding core, effectively preventing the winding core from breaking and deforming internally and the external aluminum-plastic film from rupturing after external force damage. Adding a cylinder outside the winding core improves the protection performance of the battery under external force impact, thereby improving safety performance and reducing the risk of fire and explosion.
[0022] The above-described implementation methods do not constitute a limitation on the protection scope of the technical solution. Any modification, equivalent replacement and improvement made within the spirit and principle of the above-described implementation methods shall be included in the protection scope of the technical solution.
Claims
1. A highly safe cylindrical battery structure, characterized in that: The invention comprises a cylinder (10) with an opening formed at one end, a winding core (20) placed in the cylinder (10), a center hole (21) formed in the center of the winding core (20), a supporting column (30) passing through the center hole (21), and an aluminum-plastic film covering and encapsulating the outer periphery of the cylinder (10).
2. The high-safety cylindrical battery structure according to claim 1, characterized in that: The supporting column (30) is a solid cylinder.
3. The high-safety cylindrical battery structure according to claim 1, characterized in that: The thickness of the cylinder (10) is 0.8-1.0 mm.
4. The high-safety cylindrical battery structure according to claim 3, characterized in that: The edge of the open end of the cylinder (10) is chamfered.
5. The high-safety cylindrical battery structure according to claim 1, characterized in that: The diameter of the central hole (21) is 2.0-3.0 mm.
6. The high-safety cylindrical battery structure according to claim 1, characterized in that: The diameter of the support column (30) is 1.0 mm-1.5 mm.
7. The high-safety cylindrical battery structure according to claim 6, characterized in that: The edges of both end surfaces of the support column (30) are chamfered.
8. The high-safety cylindrical battery structure according to claim 1, characterized in that: The material of the cylinder (10) and the supporting column (30) is any one of POM plastic, PAI plastic, PPS plastic and PEEK plastic.