Pole column and pole piece connecting structure, battery and electronic equipment
By introducing an adapter mechanism and groove design into the pole post and pole sheet connection structure of the battery, the problem of poor safety of the battery connection structure is solved, rapid fuse and safety protection in the case of short circuit are achieved, and the overall safety of the battery is improved.
Patent Information
- Application Number
- CN202421686981.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-16
- Publication Date
- 2025-05-27
- Estimated Expiration
- 2034-07-16
AI Technical Summary
In the existing battery technology, the connection structure between the pole column and the pole plate has poor safety problems, and it is difficult to prevent damage and fire accidents caused by abnormal situations such as short circuits in the battery.
A pole and pole connecting structure is adopted, including a battery cell assembly, a pole assembly and an adapter mechanism, which is connected to the left battery cell through the first adapter part, a second adapter part is connected to the right battery cell, a contact part is connected to the pole assembly, a first adapter part and a second adapter part are arranged at intervals, a fuse part is connected to the first adapter part, a second adapter part and a contact part, and a groove is provided on the fuse part to achieve rapid fuse and safety protection.
When a battery has an abnormal situation such as a short circuit, the current in the groove generates sufficient heat to achieve rapid fuse, avoid further damage to the battery and safety accidents, and improve the safety of the battery.
Smart Images
Figure CN222915067U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of batteries, and in particular relates to a pole and pole piece connection structure, a battery and an electronic device. Background Art
[0002] In the battery production process, the connection between the pole and the pole piece is a crucial link, which will directly affect the performance, conductivity and safety of the battery. At present, in battery technology, laser welding is usually used to treat the joints to reduce the reflection effect during welding and improve the welding quality. Although it can reduce impedance to a certain extent, the equipment cost is high, the process is complicated, and it is difficult to completely eliminate the unstable factors in the welding process. When the battery has abnormal conditions such as short circuit, it is difficult to prevent further damage to the battery or even cause safety accidents such as fire.
[0003] Therefore, it is necessary to provide a new technical solution to solve the above technical problems. Utility Model Content
[0004] The technical problem to be solved by the utility model is the technical problem of poor safety.
[0005] In order to solve the above technical problems, the utility model provides a pole and pole piece connection structure, which includes: a battery cell assembly, a pole assembly and a transfer mechanism, the battery cell assembly includes a left battery cell and a right battery cell; the transfer mechanism includes a first transfer piece, a second transfer piece, a contact portion and a fuse portion respectively connected to the first transfer piece, the second transfer piece and the contact portion, the first transfer piece is connected to the left battery cell, the second transfer piece is connected to the right battery cell, the contact portion is connected to the pole assembly, the first transfer piece and the second transfer piece are spaced apart, and a groove is provided in the fuse portion.
[0006] Optionally, the fuse portion includes: a first side surface and a second side surface opposite to each other, and the groove is formed by bending from the first side surface in a direction close to the second side surface.
[0007] Optionally, a value range of a dimension of the groove along a first direction is 0.8 mm to 1 mm, and the first direction is a direction in which the contact portion approaches the fuse portion.
[0008] Optionally, the groove is hemispherical.
[0009] Optionally, the pole assembly includes: a column and a base connected to the column, and the base is welded to the contact portion.
[0010] Optionally, the first adapter sheet is welded to the left battery cell, and the second adapter sheet is welded to the right battery cell.
[0011] Optionally, an open groove is formed between the first adapter piece and the second adapter piece, and the open groove includes a connecting section and an opening section connected to the connecting section in sequence along a direction away from the fuse part, and the opening section is gradually expanded along a direction away from the fuse part.
[0012] Optionally, the contact portion is spaced apart from the first adapter sheet portion and the second adapter sheet portion respectively.
[0013] According to another aspect of the utility model, the utility model further provides a battery, and the battery includes the pole and pole piece connection structure.
[0014] According to another aspect of the utility model, the utility model further provides an electronic device, including a housing and the battery, wherein the battery is disposed in the housing.
[0015] Beneficial effects:
[0016] The utility model provides a pole and pole piece connection structure, wherein the first transfer sheet in the transfer mechanism is connected to the left battery cell of the battery cell assembly, the second transfer sheet is connected to the right battery cell of the battery cell assembly, the contact part is connected to the pole assembly, the first transfer sheet and the second transfer sheet are arranged at intervals, the fuse part is connected to the first transfer sheet, the second transfer sheet and the contact part respectively, and a groove is arranged on the fuse part. In this way, the current of the left battery cell is transmitted to the fuse part through the first transfer sheet, and the current of the right battery cell is transmitted to the fuse part through the second transfer sheet. After the current of the left battery cell and the current of the right battery cell are collected to the current of the fuse part, they will be transmitted to the contact part through the fuse part, and the current is transmitted from the contact part to the pole assembly. At the same time, the fuse part is located between the first transfer sheet, the second transfer sheet and the contact part. When an abnormal situation such as a short circuit occurs in the battery, the groove located in the fuse part will make the current easily concentrated here and generate enough heat, so as to achieve rapid fuse, and can avoid safety accidents such as further damage to the battery. Thus, the technical effect of improving safety is achieved. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.
[0018] Figure 1This is a schematic structural diagram of a connection structure between a terminal post and a pole piece provided by an embodiment of the present utility model.
[0019] Figure 2 This is a schematic structural diagram of a fusing part in a connection structure between a terminal post and a pole piece provided by an embodiment of the present utility model. Specific embodiments
[0020] The following details the embodiments of the present application. The examples of the embodiments are shown in the accompanying drawings, where the same or similar reference numerals represent the same or similar elements or elements with the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary only for explaining the present application and should not be construed as limiting the present application.
[0021] In order to enable those skilled in the art of this technology to better understand the solution of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative efforts fall within the scope of protection of the present application.
[0022] In the embodiments of the present application, "at least one" means one or more; "a plurality" means two or more. In the description of the present application, words such as "first", "second", "third", etc. are only used for the purpose of distinguishing descriptions and should not be understood as indicating or implying relative importance, nor as indicating or implying an order.
[0023] The reference to "an embodiment" or "some embodiments" etc. in this specification means that a specific feature, structure or characteristic described in connection with the embodiment is included in one or more embodiments of the present application. Thus, the terms "including", "comprising", "having" and their variants in this specification all mean "including but not limited to", unless otherwise specifically emphasized in other ways. It should be noted that in the embodiments of the present application, "and / or" describes the association relationship of associated objects and means that three relationships can exist. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone, these three situations.
[0024] It should be pointed out that in the embodiments of the present invention, when a component is referred to as being "fixed to" another component, it may be directly on the other component or there may be a central component. When a component is considered to be "connected" to another component, it may be directly connected to the other component or there may be a central component at the same time. When a component is considered to be "set on" another component, it may be directly set on the other component or there may be a central component at the same time. At the same time, "connection" in the embodiments of the present application can also be understood as electrical connection, and the connection between two electrical components can be a direct or indirect connection between the two electrical components. For example, A is connected to B, which can be either a direct connection between A and B or an indirect connection between A and B through one or more other electrical components. The terms "vertical", "horizontal", "left", "right" and similar expressions used in the embodiments of the present invention are for illustrative purposes only and are not intended to limit the present invention.
[0025] The utility model provides a connection structure between a pole and a pole piece 4 according to the first embodiment. Figures 1 to 2 As shown, Figure 1 This is a schematic diagram of a connection structure between a pole and a pole piece provided by an embodiment of the utility model. Figure 2 It is a structural schematic diagram of a fuse part 34 in a pole-to-pole connection structure provided by an embodiment of the utility model. A pole-to-pole 4 connection structure provided by an embodiment of the utility model includes a cell assembly 1, a pole assembly 2 and a switching mechanism, the cell assembly 1 includes a left cell and a right cell, the switching mechanism includes a first switching piece 31, a second switching piece 32, a contact part 33 and a fuse part 34, the fuse part 34 is respectively connected to the first switching piece 31, the second switching piece 32 and the contact part 33, the first switching piece 31 is connected to the left cell, the second switching piece 32 is connected to the right cell, the contact part 33 is connected to the pole assembly 2, the first switching piece 31 and the second switching piece 32 are arranged at intervals, and a groove 341 is arranged on the fuse part 34.
[0026] Among them, the first transfer sheet 31, the second transfer sheet 32, the contact portion 33 and the fuse portion 34 can be integrally formed, and the first transfer sheet 31, the second transfer sheet 32, the contact portion 33 and the fuse portion 34 can be made of a highly conductive metal material. The left battery cell can be connected to the first transfer sheet 31 through the pole piece 4, and the current of the left battery cell will be transmitted to the first transfer sheet 31. The right battery cell can be connected to the second transfer sheet 32, and the current of the right battery cell will be transmitted to the second transfer sheet 32. In the fuse portion 34, the groove 341 of the fuse portion 34 can be located between the first position 5 and the second position 51, so that the current will be transmitted in the groove 341. Under abnormal circumstances, the current can be concentrated in the groove 341 and quickly generate sufficient heat, so that the circuit can be protected after the fuse is generated between the first position 5 and the second position 51.
[0027] In this embodiment, the first transfer piece part 31 in the transfer mechanism is connected to the left battery cell of the battery cell assembly 1, the second transfer piece part 32 is connected to the right battery cell of the battery cell assembly 1, the contact part 33 is connected to the pole column assembly 2, the first transfer piece part 31 and the second transfer piece part 32 are arranged at intervals, the fusing part 34 is respectively connected to the first transfer piece part 31, the second transfer piece part 32 and the contact part 33, and a groove 341 is arranged on the fusing part 34. In this way, the current of the left battery cell is transmitted to the fusing part 34 through the first transfer piece part 31, the current of the right battery cell is transmitted to the fusing part 34 through the second transfer piece part 32. After the current of the left battery cell and the current of the right battery cell converge to the current of the fusing part 34, it will be transmitted to the contact part 33 through the fusing part 34, and the current is transmitted from the contact part 33 to the pole column assembly 2. At the same time, the fusing part 34 is located between the first transfer piece part 31, the second transfer piece part 32 and the contact part 33. When an abnormal situation such as a short circuit occurs in the battery, the groove 341 in the fusing part 34 will cause the current to concentrate here easily and generate enough heat to achieve rapid fusing, and can avoid safety accidents such as further damage to the battery. Thus, the technical effect of improving safety is achieved.
[0028] As an implementation manner, the fusing part 34 includes a first side surface and a second side surface, the first side surface and the second side surface are opposite to each other, the first side surface may refer to the front surface of the fusing part 34, and the second side surface may refer to the back surface of the fusing part 34, that is, the second side surface and the pole column assembly 2 are on the same side, and the groove 341 is formed by bending from the first side surface along the direction close to the second side surface. When an abnormal situation such as a short circuit occurs in the battery, due to the special bending shape of the groove 341, the current will be more concentrated in the groove 341 area when flowing through the fusing part 34. This concentration effect increases the current density at the groove 341, and a large amount of heat is generated rapidly. As the heat accumulates, the material of the fusing part 34 reaches the melting point and fuses, effectively cutting off the current path and preventing further damage to the battery or the occurrence of safety accidents.
[0029] In some implementation manners, the numerical range of the dimension of the groove 341 along the first direction is 0.8 mm to 1 mm, the first direction is the direction in which the contact part 33 approaches the fusing part 34, that is, the first direction is Figure 2 the up and down direction in []. Assuming that the numerical value of the dimension of the groove 341 along the first direction is H, then 0.8 mm ≤ H ≤ 1 mm. When the numerical range of the dimension of the groove 341 along the first direction is 0.8 mm to 1 mm, it will make the fusing part 34 easy to fuse and keep working normally without being fused under normal current. It ensures that the groove 341 can effectively guide the current to concentrate, and will not affect the overall strength and stability of the fusing part 34 due to too large or too small dimensions.
[0030] In some embodiments, the groove 341 is hemispherical, i.e., the inner surface of the groove 341 is hemispherical. The hemispherical groove 341 can more effectively guide the current to concentrate in the fusing part 34. At the same time, the smooth hemispherical surface is also conducive to the uniform distribution and rapid transfer of heat, which will accelerate the fusing process and generate a large amount of heat quickly in the groove 341 area. That is, the groove 341 area serves as a junction. The left battery cell can be welded to the first adapter tab part 31 around the rotating pole piece, and the current of the left battery cell can be transmitted to the groove 341 area. Similarly, the right battery cell can be welded to the second adapter tab part 32 around the rotating pole piece, and the current of the right battery cell can be transmitted to the groove 341 area. For example, during a short-circuit test, the currents of the left and right battery cells will be transmitted to the groove 341 area of the fusing part 34, then transmitted from the fusing part 34 to the contact part 33, and from the contact part 33 to the pole assembly 2. When the battery is in an abnormal short-circuit state, a large amount of heat is generated at the top of the fusing part 34 near the contact part 33 along the connection line between the first position 5 and the second position 51. As time increases, the connection at the groove 341 area will overheat and disconnect. When the battery is in normal use, the current passing through is much lower than the short-circuit current. At this time, the fusing part 34 will not be fused and will work normally.
[0031] In some embodiments, the pole assembly 2 includes a column body 21 and a base 22. The base 22 is connected to the column body 21, and the base 22 is welded to the contact part 33. The mutual welding of the base 22 and the contact part 33 will enhance the connection strength between the pole assembly 2 and the transfer mechanism. In the normal operation or abnormal situation of the battery, this stable connection structure can effectively prevent current leakage or interruption and improve the overall performance and safety of the battery.
[0032] In some embodiments, the first adapter tab part 31 is welded to the left battery cell, and the second adapter tab part 32 is welded to the right battery cell, so that the current can be transmitted between the battery cell assembly 1, the transfer mechanism, and the pole assembly 2 along a predetermined path, ensuring the normal operation and safety of the battery.
[0033] In some embodiments, an opening groove 321 is formed between the first adapter tab part 31 and the second adapter tab part 32. The opening groove 321 sequentially includes a connection section 3211 and an opening section 3212 along the direction away from the fusing part 34. The opening section 3212 is connected to the connection section 3211. The connection section 3211 can be rectangular, and the opening section 3212 is gradually expanding along the direction away from the fusing part 34, so that the currents transmitted to the first adapter tab part 31 and the second adapter tab part 32 are respectively concentrated at the fusing part 34. In the normal operation state of the battery, after the current of the left battery cell passes through the first adapter tab part 31 and the current of the right battery cell passes through the second adapter tab part 32, they will both be transmitted to the fusing part 34 and converge at the fusing part 34.
[0034] In some embodiments, the contact portion 33 is spaced apart from the first adapter sheet 31 and the second adapter sheet 32, that is, there is a gap between the contact portion 33 and the first adapter sheet 31, and there is also a gap between the contact portion 33 and the second adapter sheet 32. When the battery is working normally or abnormally, since the contact portion 33 is spaced apart from the first adapter sheet 31 and the second adapter sheet 32, respectively, the clarity and stability of the current transmission path will be ensured. When an abnormal situation such as a short circuit occurs in the battery, the fuse portion 34 can respond quickly and fuse, effectively cutting off the current path. At the same time, due to the spacing between the contact portion 33 and the first adapter sheet 31 and the second adapter sheet 32, mutual interference will be reduced, making the fusing process faster and more accurate, which can improve the safety of the battery.
[0035] In order to explain a battery provided by the utility model in detail, the above-mentioned embodiment 1 explains a connection structure between a pole and a pole piece 4 in detail. Based on the same utility model concept, the present application also provides a battery, see embodiment 2 for details.
[0036] The second embodiment of the present invention provides a battery, including the connection structure between the pole and the pole piece 4.
[0037] The utility model provides a battery, wherein a first adapter sheet 31 in an adapter mechanism is connected to a left battery cell of a battery cell assembly 1, a second adapter sheet 32 is connected to a right battery cell of the battery cell assembly 1, a contact portion 33 is connected to a pole assembly 2, the first adapter sheet 31 and the second adapter sheet 32 are arranged at intervals, a fuse portion 34 is respectively connected to the first adapter sheet 31, the second adapter sheet 32 and the contact portion 33, and a groove 341 is arranged on the fuse portion 34. In this way, the current of the left battery cell is transmitted to the fuse part 34 through the first adapter part 31, and the current of the right battery cell is transmitted to the fuse part 34 through the second adapter part 32. After the current of the left battery cell and the current of the right battery cell are collected to the current of the fuse part 34, they will be transmitted to the contact part 33 through the fuse part 34, and the current will be transmitted from the contact part 33 to the pole assembly 2. At the same time, the fuse part 34 is located between the first adapter part 31, the second adapter part 32 and the contact part 33. When the battery is short-circuited or in an abnormal situation, the groove 341 located in the fuse part 34 will make the current easily concentrated here and generate enough heat, so as to achieve rapid fusing, and avoid safety accidents such as further damage to the battery. Thus, the technical effect of improving safety is achieved.
[0038] In order to explain in detail an electronic device provided by the utility model, the above-mentioned embodiment 1 explains in detail a connection structure between a pole and a pole piece 4. Based on the same utility model concept, the present application also provides an electronic device, see embodiment 3 for details.
[0039] Embodiment 3 of the present utility model provides an electronic device, including a housing and the battery disposed within the housing. Specifically, the electronic device includes, but is not limited to, mobile phones, tablet computers, laptop computers, digital cameras, vehicle-mounted devices, drones, electric bicycles, electronic toys, and wearable devices. The material of the housing can be metal, such as steel, copper, or aluminum, or it can be a composite film.
[0040] The present utility model provides an electronic device. By disposing the battery within the housing, the first connecting piece portion 31 of the battery transfer mechanism is connected to the left battery cell of the battery cell assembly 1, the second connecting piece portion 32 is connected to the right battery cell of the battery cell assembly 1, the contact portion 33 is connected to the pole column assembly 2, the first connecting piece portion 31 and the second connecting piece portion 32 are spaced apart, the fusing portion 34 is respectively connected to the first connecting piece portion 31, the second connecting piece portion 32, and the contact portion 33, and a groove 341 is provided on the fusing portion 34. In this way, the current of the left battery cell is transmitted to the fusing portion 34 through the first connecting piece portion 31, the current of the right battery cell is transmitted to the fusing portion 34 through the second connecting piece portion 32. After the current of the left battery cell and the current of the right battery cell converge to the current of the fusing portion 34, it will be transmitted to the contact portion 33 through the fusing portion 34, and the current is transmitted from the contact portion 33 to the pole column assembly 2. At the same time, the fusing portion 34 is located between the first connecting piece portion 31, the second connecting piece portion 32, and the contact portion 33. When an abnormal situation such as a short circuit occurs in the battery, the groove 341 located on the fusing portion 34 will cause the current to concentrate here easily and generate sufficient heat to achieve rapid fusing, which can avoid safety accidents such as further damage to the battery. Thus, the technical effect of improving safety is achieved.
[0041] Finally, it should be noted that the above specific embodiments are only used to illustrate the technical solutions of the present utility model and not to limit them. Although the present utility model has been described in detail with reference to the examples, those of ordinary skill in the art should understand that the technical solutions of the present utility model can be modified or equivalently replaced without departing from the spirit and scope of the technical solutions of the present utility model, and they should all be covered within the scope of the claims of the present utility model.
Claims
1. A pole and pole piece connection structure, characterized in that: The pole and pole piece connection structure includes: a battery cell assembly, a pole column assembly and a transfer mechanism, the battery cell assembly includes a left battery cell and a right battery cell; the transfer mechanism includes a first transfer sheet, a second transfer sheet, a contact portion and a fuse portion respectively connected to the first transfer sheet, the second transfer sheet and the contact portion, the first transfer sheet is connected to the left battery cell, the second transfer sheet is connected to the right battery cell, the contact portion is connected to the pole column assembly, the first transfer sheet and the second transfer sheet are spaced apart, and a groove is provided in the fuse portion.
2. The pole-to-pole connection structure according to claim 1, characterized in that: The fuse portion includes a first side surface and a second side surface opposite to each other, and the groove is formed by bending from the first side surface in a direction close to the second side surface.
3. The pole-to-pole connection structure according to claim 1, characterized in that: The numerical value range of the dimension of the groove along the first direction is 0.8 mm to 1 mm, and the first direction is the direction in which the contact portion approaches the fuse portion.
4. The pole-to-pole connection structure according to claim 1, characterized in that: The groove is hemispherical.
5. The pole-to-pole connection structure according to claim 1, characterized in that: The pole assembly comprises: a column and a base connected to the column, and the base is welded to the contact portion.
6. The pole-to-pole connection structure according to claim 1, characterized in that: The first adapter piece is welded to the left battery cell, and the second adapter piece is welded to the right battery cell.
7. The pole-to-pole connection structure according to claim 1, characterized in that: An open slot is formed between the first adapter piece and the second adapter piece. The open slot includes a connecting section and an opening section connected to the connecting section in sequence along a direction away from the fuse part. The opening section is gradually expanded along a direction away from the fuse part.
8. The pole-to-pole connection structure according to claim 1, characterized in that: The contact portion is spaced apart from the first transfer sheet portion and the second transfer sheet portion respectively.
9. A battery, characterized in that: The battery comprises a pole and pole piece connection structure as claimed in any one of claims 1 to 8.
10. An electronic device, characterized in that: The invention comprises a housing, and the battery as claimed in claim 9, wherein the battery is arranged in the housing.