Battery pole piece, battery roll core, battery and electric equipment
By designing a new pole plate structure, the two pole plates share multiple pole ears and set up a fuse structure, the problems of low production efficiency and high cost when producing multi-coil batteries in the prior art are solved, and efficient production and battery safety are achieved.
Patent Information
- Application Number
- CN202420826521.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-19
- Publication Date
- 2025-04-15
- Estimated Expiration
- 2034-04-19
AI Technical Summary
In the field of existing power battery, when producing multi-coil batteries, the pole plate structure leads to low production efficiency and high production costs.
A new type of pole plate structure is designed, in which the two pole plates share multiple pole ears, and a fuse structure is set in the pole ears. The pole ears and pole plates are formed integrally, eliminating the pairing process and achieving synchronous winding.
The battery winding production efficiency is improved, production costs are reduced, and the battery safety is improved through the fuse structure.
Smart Images
Figure CN222763134U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the field of battery technology, and in particular to battery pole pieces, battery cores, batteries, and electrical equipment. Background Art
[0002] In the field of power batteries in the prior art, when a battery has more than two winding cores, during the production process of the winding core, the winding core can only be produced separately, and then the two winding cores are paired and combined. Such a pole piece structure will lead to low production efficiency and increase the investment in production equipment. How to design a new pole piece structure to facilitate production and winding is a technical problem that needs to be solved in this field. Utility Model Content
[0003] In view of this, the present application provides a battery electrode, a battery core, a battery and an electrical device, and designs a new electrode structure that can facilitate production and winding, improve production efficiency and reduce production costs.
[0004] In a first aspect, the present application provides a battery electrode, comprising: two electrode sheets spaced apart along a first direction, a pole lug connected between the two electrode sheets, and the pole lug being provided with a fuse structure.
[0005] In combination with the first aspect, in a possible implementation manner, there are multiple pole tabs, and the multiple pole tabs are arranged at intervals along the second direction, and the first direction and the second direction are perpendicular to each other.
[0006] In combination with the first aspect, in a possible implementation, the pole ear includes a main body portion and a connecting portion that are interconnected, the main body portion is interconnected with the two pole pieces that are spaced apart, the connecting portion is used to connect to a pole or a adapter, and the fuse structure is arranged between the main body portion and the connecting portion.
[0007] In combination with the first aspect, in a possible implementation, the main body is connected to the pole pieces on both sides along the first direction; the fuse structure is connected to one side of the main body along the second direction, and the connecting portion is connected to the side of the fuse structure away from the main body; the size of the connecting portion along the first direction is smaller than the size of the main body along the first direction; wherein the second direction is perpendicular to the first direction.
[0008] In combination with the first aspect, in a possible implementation manner, a size of the fuse structure along the first direction is smaller than a size of the connection portion along the first direction.
[0009] In combination with the first aspect, in a possible implementation manner, the fuse structure is a hollow structure, and the hollow structure runs through the thickness direction of the electrode tab.
[0010] In combination with the first aspect, in a possible implementation manner, the thickness of the fuse structure is smaller than the thickness of the main body portion and smaller than the thickness of the connecting portion.
[0011] In the second aspect, the present application provides a battery roll core, comprising a plurality of the aforementioned battery pole sheets, wherein the plurality of battery pole sheets and a diaphragm are overlapped and wound to form two battery roll cores, and the plurality of pole ears corresponding to the same pole sheet overlap with each other, and the pole ears connect the two battery roll cores.
[0012] In a third aspect, the present application provides a battery, comprising the aforementioned battery roll core.
[0013] In a fourth aspect, the present application provides an electrical device comprising the aforementioned battery.
[0014] When the present application is used, the two pole pieces share the pole lugs, and there is no need to produce two pole pieces separately to wind up two winding cores, which reduces the process of separating the empty foil strips, improves production efficiency and reduces production costs. The two pole pieces can be synchronously wound up at the same time to form two winding cores. The pairing of the two winding cores is achieved after the winding production is completed. The pairing process is omitted in the production process, which greatly improves the production efficiency of the winding process and reduces the production cost of the winding process. At the same time, the two pole pieces of the utility model are connected together by the pole lugs, and there is no need to set a transition piece part between the two pole pieces, which reduces the cost of the battery cell. The fuse structure can disconnect the pole piece and the pole lug from each other when a short circuit occurs in the battery, thereby effectively improving the safety of the battery. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 Shown is a schematic structural diagram of a battery electrode provided in one embodiment of the present application.
[0016] Figure 2 Shown is a schematic structural diagram of a pole ear provided in one embodiment of the present application.
[0017] Figure 3 Shown is a schematic structural diagram of a pole ear provided in another embodiment of the present application.
[0018] Figure 4 Shown is a schematic structural diagram of a pole ear provided in another embodiment of the present application.
[0019] Figure 5 Shown is a schematic diagram of the winding process of multiple battery pole pieces provided in one embodiment of the present application. DETAILED DESCRIPTION
[0020] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions 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.
[0021] An exemplary battery pole piece is as follows:
[0022] Figure 1 The figure shows a schematic diagram of the structure of a battery electrode provided by an embodiment of the present application. The present application provides a battery electrode, in one embodiment, such as Figure 1 As shown, the battery electrode comprises two electrode sheets 1 spaced apart along a first direction. Figure 1 The middle is horizontal, and the two pole pieces 1 are connected with a pole ear 2, and the pole ear 2 is provided with a fuse structure 3. The fuse structure mainly increases the internal resistance here by reducing the cross-sectional area. When the battery is short-circuited, the fuse structure will generate a lot of heat, melt after reaching the metal melting point, destroy the current path, and prevent further explosion and fire.
[0023] When this embodiment is used, the two pole pieces 1 share the pole ear 2. In other words, the pole ear 2 is integrally formed with the two pole pieces 1. There is no need to produce two pole pieces separately to wind them into two winding cores, which reduces the process of separating the empty foil strips, improves production efficiency and reduces production costs. The two pole pieces 1 can be synchronously wound to form two winding cores at the same time. The pairing of the two winding cores is achieved after the winding production is completed. The pairing process is omitted in the production process, which greatly improves the production efficiency of the winding process and reduces the production cost of the winding process. At the same time, the two pole pieces 1 of the utility model are connected together by the pole ear 2, and there is no need to set a transition piece part between the two pole pieces 1, which reduces the cost of the battery cell. The fuse structure 3 can disconnect the pole piece 1 and the pole ear 2 from each other when a short circuit occurs in the battery, thereby effectively improving the safety of the battery.
[0024] In one embodiment, if Figure 1 As shown, there are multiple pole lugs 2, and the multiple pole lugs 2 are arranged at intervals along the second direction. The first direction and the second direction are perpendicular to each other. Figure 1 The position of the pole lug 2 is set so that after the pole piece 1 is wound to form a winding core, multiple pole lugs 2 overlap each other, reducing pole lug misalignment, facilitating connection between the pole lug 2 and the pole or other external conductive parts, and reducing assembly difficulty.
[0025] Figure 2 FIG. 1 is a schematic diagram of the structure of a tab provided in an embodiment of the present application. Figure 2As shown, the pole lug 2 includes a main body 203 and a connecting portion 204 connected to each other. The main body 203 is used to connect to the pole pieces 1 on both sides, and the connecting portion 204 is used to electrically connect to the pole. The fuse structure 3 is arranged between the main body 203 and the connecting portion 204. Figure 2 In the figure, the fuse structure 3 is the boundary between the main body 203 and the connecting part 204. The cross-sectional area of the connecting part 204 is smaller than the cross-sectional area of the main body 203. The cross-sectional area of the boundary changes suddenly, and the resistance is large. When a short circuit occurs in the battery, the fuse structure generates a large amount of heat and melts first.
[0026] Figure 3 FIG. 1 is a schematic diagram of the structure of a tab provided in another embodiment of the present application. Figure 3 As shown, both sides of the body 203 in the first direction are connected to the pole piece 1 respectively, the fuse structure 3 is arranged adjacent to the body in the second direction, and the connecting portion 204 is connected to one end of the fuse structure 3 in the second direction away from the body 203. The size of the connecting portion 204 along the first direction is smaller than the size of the body 203 along the first direction, so that the connecting portion 204 and the body 203 are easier to disconnect. Preferably, the size of the connecting portion in the first direction is larger than 1 / 3 of the size of the body in the first direction, so as to prevent the problem of low connection strength with the pole or other external connecting parts caused by too small a size of the connecting portion.
[0027] In one embodiment, the size of the fuse structure 3 along the first direction is smaller than the size of the connecting portion 204 along the first direction. The fuse structure 3 with a small size can be more conducive to disconnection of the fuse structure 3.
[0028] Figure 4 FIG. 1 is a schematic diagram of the structure of a tab provided in another embodiment of the present application. Figure 4 As shown, the fuse structure 3 is a hollow structure 301, and the hollow structure 301 runs through the thickness direction of the pole ear 2. The fuse structure 3 with the hollow structure 301 can effectively reduce the connection strength between the main body 203 and the connecting part 204, greatly reduce the cross-sectional area through which the current passes, increase the resistance, and make it easier to disconnect the main body 203 and the connecting part 204. It should be noted that the hollow structure 301 here can be a through hole, or a plurality of through holes arranged at intervals, and can be a round hole, a square hole, or a hole of other shapes.
[0029] In one embodiment, the thickness of the fuse structure 3 is less than the thickness of the main body 203 and less than the thickness of the connecting portion 204. By reducing the thickness of the fuse structure 3, the cross-sectional area of the current path here is reduced, which plays a role in increasing resistance. In this embodiment, the small thickness of the fuse structure 3 can be more conducive to the disconnection of the fuse structure 3 when a short circuit occurs in the battery. Preferably, the thickness of the fuse structure 3 is 1 / 3 to 2 / 3 of the thickness of the main body 203. If the thickness is too small, the connection strength of the fuse structure 3 is too low, which is not conducive to the passage of current under normal conditions. If the thickness is too large, it will not have a fuse effect, which is not conducive to the safety of the battery.
[0030] An exemplary battery roll is as follows:
[0031] The present application also provides a battery roll core, which includes a plurality of the aforementioned battery pole pieces, wherein the plurality of battery pole pieces and the separator are overlapped and wound to form two battery roll cores 5, wherein a plurality of pole tabs 2 corresponding to the same pole piece 1 overlap each other, and the pole tabs 2 connect the two battery roll cores. A separator structure 4 is provided between adjacent battery pole pieces to insulate adjacent pole pieces 1 after winding.
[0032] Figure 5 FIG. 1 is a schematic diagram of a winding process of multiple battery pole pieces provided in an embodiment of the present application. Figure 5 First, coating is performed to form two spaced film areas 1011, with an empty foil area 1012 between the two film areas 1011, and then the empty foil area 1012 is molded to form a plurality of pole ears 2, a diaphragm structure 4 is arranged between two different pole sheets 1, and then the two pole sheets 1 are overlapped and wound, and the two different pole sheets 1 are respectively used as a positive pole sheet 101 and a negative pole sheet 102, and two battery roll cores 5 are formed after winding, and the plurality of pole ears 2 corresponding to the positive pole sheet 101 overlap with each other to form a positive pole ear 201, and the plurality of pole ears 2 corresponding to the negative pole sheet 102 overlap with each other to form a negative pole ear 202.
[0033] Exemplary batteries and powered devices are as follows:
[0034] The present application also provides a battery, which includes the aforementioned battery roll core.
[0035] In the embodiments of the present application, the battery may be a secondary battery, which refers to a battery that can be used continuously by activating the active material by charging after the battery is discharged. The battery may be a lithium ion battery, a sodium ion battery, a sodium lithium ion battery, a lithium metal battery, a sodium metal battery, a lithium sulfur battery, a magnesium ion battery, a nickel hydrogen battery, a nickel cadmium battery, a lead storage battery, etc., and the embodiments of the present application are not limited thereto.
[0036] As an example, the battery can be a cylindrical battery, a prismatic battery, a soft-pack battery or a battery of other shapes. Prismatic batteries include square shell batteries, blade-shaped batteries, and polygonal prismatic batteries. Polygonal prismatic batteries are, for example, hexagonal prismatic batteries, etc. There is no particular limitation in the present application.
[0037] The battery mentioned in the embodiments of the present application refers to a single physical module including one or more batteries to provide higher voltage and capacity.
[0038] In some embodiments, the battery may be a battery module. When there are multiple batteries, the multiple batteries are arranged and fixed to form a battery module.
[0039] In some embodiments, the battery may be a battery pack, which includes a case and batteries, wherein the batteries or battery modules are accommodated in the case.
[0040] In some embodiments, the box body can be used as a part of the chassis structure of the vehicle. For example, part of the box body can become at least a part of the floor of the vehicle, or part of the box body can become at least a part of the cross beam and longitudinal beam of the vehicle.
[0041] In some embodiments, the battery may be an energy storage device, which includes an energy storage container, an energy storage cabinet, and the like.
[0042] The present application also provides an electrical device, which includes the aforementioned battery. The battery disclosed in the embodiment of the present application can be used in electrical devices such as vehicles, ships or aircraft, but is not limited to it. A power supply system of the electrical device can be composed of the pole piece, winding core, battery, etc. disclosed in the present application, so that the battery production process can be effectively reduced and the battery safety performance can be improved.
[0043] The embodiment of the present application provides an electric device using a battery as a power source, and the electric device may be, but is not limited to, a mobile phone, a tablet, a laptop, an electric toy, an electric tool, a battery car, an electric car, a ship, a spacecraft, etc. Among them, the electric toy may include a fixed or mobile electric toy, for example, a game console, an electric car toy, an electric ship toy, an electric airplane toy, etc., and the spacecraft may include an airplane, a rocket, a space shuttle, a spacecraft, etc.
[0044] The basic principles of the present application are described above in conjunction with specific embodiments. However, it should be noted that the advantages, strengths, effects, etc. mentioned in the present application are only examples and not limitations, and it cannot be considered that these advantages, strengths, effects, etc. are required by each embodiment of the present application. In addition, the specific details disclosed above are only for the purpose of illustration and ease of understanding, not for limitation, and the above details do not limit the present application to being implemented by adopting the above specific details.
[0045] The block diagrams of the devices, apparatuses, equipment, and systems involved in this application are only illustrative examples and are not intended to require or imply that they must be connected, arranged, and configured in the manner shown in the block diagram. As will be appreciated by those skilled in the art, these devices, apparatuses, equipment, and systems can be connected, arranged, and configured in any manner. Words such as "including", "comprising", "having", etc. are open words, referring to "including but not limited to", and can be used interchangeably with them. The words "or" and "and" used here refer to the words "and / or" and can be used interchangeably with them, unless the context clearly indicates otherwise. The words "such as" used here refer to the phrase "such as but not limited to", and can be used interchangeably with them.
[0046] It should also be noted that in the apparatus, device and method of the present application, each component or each step can be decomposed and / or recombined. Such decomposition and / or recombination should be regarded as equivalent solutions of the present application.
[0047] The above description of the disclosed aspects is provided to enable any person skilled in the art to make or use the present application. Various modifications to these aspects will be readily apparent to those skilled in the art, and the general principles defined herein may be applied to other aspects without departing from the scope of the present application. Therefore, the present application is not intended to be limited to the aspects shown herein, but rather to the widest scope consistent with the principles and novel features of this utility model.
[0048] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.
Claims
1. A battery pole piece, characterized in that: include: Two pole pieces (1) are spaced apart along a first direction, a pole lug (2) is connected between the two pole pieces (1), and the pole lug (2) is provided with a fuse structure (3).
2. The battery electrode according to claim 1, characterized in that: There are a plurality of pole tabs (2), and the plurality of pole tabs (2) are arranged at intervals along a second direction, and the first direction and the second direction are perpendicular to each other.
3. The battery pole piece according to claim 1, characterized in that: The pole lug (2) comprises a main body (203) and a connecting part (204) which are connected to each other, the main body (203) is connected to the two pole pieces (1) which are arranged at intervals, the connecting part (204) is used to connect to a pole or a transition piece, and the fuse structure (3) is arranged between the main body (203) and the connecting part (204).
4. The battery pole piece according to claim 3, characterized in that: The main body (203) is connected to the pole piece (1) on both sides along the first direction; the fuse structure (3) is connected to one side of the main body along the second direction, and the connecting portion (204) is connected to a side of the fuse structure (3) away from the main body; the size of the connecting portion (204) along the first direction is smaller than the size of the main body (203) along the first direction; wherein the second direction is perpendicular to the first direction.
5. The battery pole piece according to claim 4, characterized in that: The size of the fuse structure (3) along the first direction is smaller than the size of the connecting portion (204) along the first direction.
6. The battery pole piece according to claim 4, characterized in that: The fuse structure (3) is a hollow structure (301), and the hollow structure (301) runs through the thickness direction of the electrode tab (2).
7. The battery pole piece according to claim 4, characterized in that: The thickness of the fuse structure (3) is smaller than the thickness of the main body (203) and smaller than the thickness of the connecting portion (204).
8. A battery roll core, characterized in that: include: A plurality of battery pole sheets as claimed in any one of claims 1 to 7, wherein the plurality of battery pole sheets and a separator are overlapped and wound to form two battery winding cores (5), and a plurality of pole ears (2) corresponding to the same pole sheet (1) overlap each other, and the pole ears (2) connect the two battery winding cores.
9. A battery, characterized in that: Comprising the battery roll core as claimed in claim 8.
10. An electrical device, characterized in that: Comprising the battery as claimed in claim 9.