Positive current collector and battery
By incorporating a fuse in the positive current collector, the circuit can be connected and disconnected, thus solving the safety issues of the battery under current overload or overcurrent and improving the battery's safety performance.
Patent Information
- Application Number
- CN202422708908.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-07
- Publication Date
- 2025-11-11
- Estimated Expiration
- 2034-11-07
AI Technical Summary
The positive current collector may experience current overload or overcurrent in the battery, leading to battery malfunction or damage and affecting safe use.
Design a positive current collector comprising a first region and a second region, wherein the circuit is connected and disconnected by a fuse, and the fuse is configured to melt and break in the event of current overload or overcurrent to protect the internal circuit of the battery.
It effectively avoids overcurrent circuits from impacting the battery, improves battery safety performance, and protects the battery's internal circuitry.
Smart Images
Figure CN223539837U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of battery structure technology, and more specifically, to a positive electrode current collector and a battery. Background Technology
[0002] The positive current collector in a battery is mainly used to collect and conduct electrons from the positive electrode material. During daily use, the positive current collector may experience current overload or overcurrent, which can cause the battery connected to the positive current collector to malfunction or be damaged, thus affecting the safe use of the battery. Utility Model Content
[0003] The purpose of this invention is to provide a positive current collector and a battery, wherein the fusible part will melt to cut off the circuit connection between the first region and the second region, thereby protecting the internal circuit of the battery and improving the safety performance of the battery.
[0004] The first aspect of this utility model provides a positive current collector, which includes a first region and a second region.
[0005] A first region is provided with an injection hole, a first through-hole, and a fuse. An opening is formed between the two opposite ends of the first through-hole. The fuse is disposed at the opening and closes the opening. The injection hole is located between the first through-hole and the fuse. One side of the first region is electrically connected to the positive electrode of the battery cell.
[0006] The second region is disposed around the outer periphery of the first region. The second region is connected to the circuit of the first region through the fuse, or the second region can be disconnected from the circuit of the first region through the fuse.
[0007] In one possible embodiment of this utility model, the first through-hole is a "C"-shaped structure, and the fused portion is located at the opening position of the first through-hole of the "C"-shaped structure.
[0008] In one possible embodiment of this utility model, the first through-hole and the fusible portion are arranged around the outer circumferential direction of the injection hole, and the injection hole and the first through-hole are spaced apart.
[0009] In one possible embodiment of this invention, the injection hole is located at the center of the positive current collector.
[0010] In one possible embodiment of this utility model, the second region is provided with a through hole and a second through port, and the through hole is connected to the first through port through the second through port.
[0011] In one possible embodiment of this utility model, there are multiple through holes, and any one of the through holes can be connected to the first through hole through a second through port.
[0012] In one possible embodiment of this utility model, a plurality of second through openings are arranged around the first through opening in the circumferential direction.
[0013] In one possible embodiment of the present invention, the first region further includes a plurality of welding portions, any one of which is located between two adjacent second through openings, and the trajectory of the welding portion is a curved structure.
[0014] In one possible embodiment of this utility model, the first region is a circular structure, the second region is an annular structure, and the first region is located at the center of the second region of the annular structure.
[0015] A second aspect of this utility model provides a battery, including the positive current collector described in any of the above embodiments.
[0016] Compared with the prior art, the beneficial effects of this utility model are as follows: This utility model provides a positive current collector and a battery. The positive current collector is used to transmit the current of the battery cell to the external circuit. During the current transmission process, the first through-hole is used to divide the positive current collector into a first region and a second region. The first region can be connected to the second region through the position of the fuse part, so that the positive electrode of the battery cell can be connected to the external circuit through the first region, the fuse part and the second region. When the external circuit experiences current overload or overcurrent, the fuse part will melt to cut off the circuit connection between the first region and the second region, thereby protecting the internal circuit of the battery, avoiding the impact and influence of the overcurrent circuit on the battery, and improving the safety performance of the battery. Attached Figure Description
[0017] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.
[0018] Figure 1 This is a schematic diagram of the structure of the positive current collector provided in some embodiments of this utility model. Figure 1 ;
[0019] Figure 2 This is a schematic diagram of the structure of the positive current collector provided in some embodiments of this utility model. Figure 2 ;
[0020] Figure 3 This is a cross-sectional structural diagram of a battery provided in some embodiments of the present invention.
[0021] Explanation of key component symbols;
[0022] 100 - Positive current collector; 110 - First region; 111 - Liquid injection hole; 112 - First through port; 1121 - Opening; 113 - Fuse; 114 - Welded part; 120 - Second region; 121 - Through hole; 122 - Second through port; 200 - Battery; 210 - Cell; 220 - Casing. Detailed Implementation
[0023] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.
[0024] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.
[0025] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.
[0026] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this utility model is in use. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.
[0027] Furthermore, terms such as "horizontal," "vertical," and "sag" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.
[0028] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.
[0029] The following detailed description, in conjunction with the accompanying drawings, outlines some embodiments of the present invention. Unless otherwise specified, the following embodiments and features can be combined with each other.
[0030] Example 1
[0031] refer to Figure 1 As shown, an embodiment of this application provides a positive current collector 100, which includes a first region 110 and a second region 120.
[0032] Specifically, in combination Figure 1 and Figure 3As shown, the first region 110 is provided with an injection hole 111, a first through-hole 112, and a fuse part 113. An opening 1121 is formed between the two opposite ends of the first through-hole 112. The fuse part 113 is disposed in the opening 1121 and closes the opening 1121. The injection hole 111 is located between the first through-hole 112 and the fuse part 113. One side of the first region 110 is electrically connected to the positive electrode of the battery cell 210. The second region 120 is disposed around the outer periphery of the first region 110. The second region 120 is electrically connected to the first region 110 through the fuse part 113, or the second region 120 can be electrically disconnected from the first region 110 through the fuse part 113. Correspondingly, a positive current collector 100 is provided. The first through-hole 112 is used to transmit the current of the cell 210 in the battery 200 to the external circuit through the positive current collector 100. During the current transmission process, the first through-hole 112 is used to divide the positive current collector 100 into a first region 110 and a second region 120. The first region 110 can be connected to the second region 120 through the position of the fuse part 113, so that the positive terminal of the cell 210 is connected to the external circuit through the first region 110, the fuse part 113 and the second region 120. When the external circuit has a current overload or overcurrent, the fuse part 113 will melt to cut off the circuit connection between the first region 110 and the second region 120, thereby protecting the internal circuit of the battery 200, avoiding the impact and influence of the overcurrent circuit on the battery 200, and improving the safety performance of the battery 200.
[0033] In one embodiment, alternatively, referencing Figure 1 As shown, the first through-hole 112 has a "C"-shaped structure, and the fuse part 113 is located at the opening 1121 of the first through-hole 112 with the "C"-shaped structure. Correspondingly, the vertical projection shape of the first through-hole 112 on the positive current collector 100 is a "C"-shaped structure. The first through-hole 112 with the "C"-shaped structure can separate the first region 110 and the second region 120. The first region 110 and the second region 120 are connected through the opening 1121 of the first through-hole 112 with the "C"-shaped structure. The fuse part 113 is set at the opening 1121 to achieve the purpose of cutting off the circuit connection between the first region 110 and the second region 120 by melting through the fuse part 113, which has a better technical effect.
[0034] Optionally, such as Figure 1As shown, the first through-hole 112 and the fuse part 113 are arranged around the outer circumference of the injection hole 111, and the injection hole 111 and the first through-hole 112 are spaced apart. The injection hole 111 is used to inject electrolyte into the cell 210. The injection hole 111 can also discharge air inside the battery 200 to prevent the generation of bubbles. That is, the first through-hole 112 and the injection hole 111 are arranged separately, and the injection hole 111 and the first through-hole 112 are not interconnected.
[0035] Based on any of the above embodiments, optionally, in combination with Figure 1 and Figure 2 As shown, the first region 110 is a circular structure, and the second region 120 is an annular structure. The first region 110 is located at the center of the second region 120 in the annular structure. The circuit connection and disconnection of the first region 110 and the second region 120 can be realized through the fuse part 113.
[0036] In summary, the positive current collector 100 is configured to transmit the current from the cell 210 in the battery 200 to the external circuit. During the current transmission process, the first through-hole 112 is used to divide the positive current collector 100 into a first region 110 and a second region 120. The first region 110 can be connected to the second region 120 through the position of the fuse part 113, so that the positive electrode of the cell 210 can be connected to the external circuit through the first region 110, the fuse part 113 and the second region 120. When the external circuit experiences current overload or overcurrent, the fuse part 113 will melt to cut off the circuit connection between the first region 110 and the second region 120, thereby protecting the internal circuit of the battery 200, avoiding the impact and influence of the overcurrent circuit on the battery 200, and improving the safety performance of the battery 200.
[0037] Example 2
[0038] refer to Figures 1 to 3 As shown, an embodiment of this application provides another positive current collector 100, which includes a first region 110 and a second region 120.
[0039] Specifically, in combination Figure 1 and Figure 3As shown, the first region 110 is provided with an injection hole 111, a first through-hole 112, and a fuse part 113. An opening 1121 is formed between the two opposite ends of the first through-hole 112. The fuse part 113 is disposed in the opening 1121 and closes the opening 1121. The injection hole 111 is located between the first through-hole 112 and the fuse part 113. One side of the first region 110 is electrically connected to the positive electrode of the cell 210. A positive current collector 100 is provided to transmit the current of the cell 210 in the battery 200 to the external circuit through the positive current collector 100.
[0040] In this embodiment, the second region 120 is disposed around the outer periphery of the first region 110. The second region 120 is electrically connected to the first region 110 through the fuse part 113, or the second region 120 can be electrically disconnected from the first region 110 through the fuse part 113. Correspondingly, during current transmission, the first through port 112 is used to divide the positive current collector 100 into the first region 110 and the second region 120. The first region 110 can be connected to the second region 120 through the position of the fuse part 113, so that the positive electrode of the cell 210 is connected to the external circuit through the first region 110, the fuse part 113 and the second region 120. When the external circuit experiences current overload or overcurrent, the fuse part 113 will melt to cut off the circuit connection between the first region 110 and the second region 120, thereby protecting the internal circuit of the battery 200, avoiding the impact and influence of the overcurrent circuit on the battery 200, and improving the safety performance of the battery 200.
[0041] In one embodiment, alternatively, referencing Figure 1 As shown, the first through-hole 112 has a "C"-shaped structure, and the fuse 113 is located at the opening 1121 of the first through-hole 112. Correspondingly, the vertical projection shape of the first through-hole 112 on the positive current collector 100 is a "C"-shaped structure. The "C"-shaped first through-hole 112 can separate the first region 110 and the second region 120. The first region 110 and the second region 120 are connected through the opening 1121 of the first through-hole 112. By placing the fuse 113 at the opening 1121, the circuit connection between the first region 110 and the second region 120 is cut off by fusing the fuse 113, which has a better technical effect. Of course, the first through-hole 112 can also adopt a similar semi-enclosed structure, such as a "U"-shaped structure or a "V"-shaped structure.
[0042] Optionally, such as Figure 1As shown, the first through-hole 112 and the fuse part 113 are arranged around the outer circumference of the injection hole 111, and the injection hole 111 and the first through-hole 112 are spaced apart. The injection hole 111 is used to inject electrolyte into the cell 210. The injection hole 111 can also discharge air inside the battery 200 to prevent the generation of bubbles. That is, the first through-hole 112 and the injection hole 111 are arranged separately, and the injection hole 111 and the first through-hole 112 are not interconnected.
[0043] Optionally, the injection hole 111 is located at the center of the positive current collector 100, and the position of the injection hole 111 is set at the center of the positive current collector 100, that is, the injection hole 111 is located in the first region 110.
[0044] In one embodiment, alternatively, referencing Figure 1 As shown, the second region 120 has a through hole 121 and a second through opening 122. The through hole 121 is connected to the first through opening 112 through the second through opening 122. Accordingly, each part can be movable. When the positive current collector 100 vibrates, any part can play a buffering and elastic transition role, preventing the positive current collector 100 from detaching or falling off under rigid connection, thus affecting the circuit connection between the positive current collector 100 and the battery cell 210. For example, the through hole 121 and the second through opening 122 divide the second region 120 into a "V" shaped structure.
[0045] Optionally, there are multiple through holes 121, and any one of the through holes 121 can be connected to the first through hole 112 through a second through hole 122. That is, the second region 120 is divided into multiple parts through the through holes 121 and the second through hole 122, and the multiple parts together play a buffering and elastic transition role for the positive current collector.
[0046] Optionally, a plurality of second through openings 122 are arranged around the first through opening 112 in the circumferential direction. Further, the plurality of second through openings 122 are arranged symmetrically. For example, there are six second through openings 122, and the six second through openings 122 are arranged opposite each other in pairs.
[0047] In one embodiment, alternatively, referencing Figure 2 and Figure 3As shown, the first region 110 also includes a plurality of welding portions 114, each of which is located between two adjacent second through openings 122. The trajectory of the welding portion 114 is a curved structure. In other words, the position of the welding portion 114 is used to realize the welding between the positive current collector and the cell of the battery 200. The curved trajectory of the welding portion 114 increases the welding area of the welding portion 114 and reduces the resistance of the battery 200 connected to the positive current collector, which has a better technical effect.
[0048] Based on any of the above embodiments, optionally, in combination with Figure 1 and Figure 2 As shown, the first region 110 is a circular structure, and the second region 120 is an annular structure. The first region 110 is located at the center of the second region 120 in the annular structure. The circuit connection and disconnection of the first region 110 and the second region 120 can be realized through the fuse part 113.
[0049] Optionally, based on any of the above embodiments, both the first region 110 and the second region 120 are made of aluminum. The first region 110 and the second region 120 of the positive electrode current collector are made of aluminum. The positive electrode current collector made of aluminum has better conductivity and lighter weight, and has better adaptability.
[0050] Example 3
[0051] An embodiment of this utility model also provides a battery 200, which includes a housing 220 and a cell 210. The cell 210 is installed inside the housing 220 and also includes a positive current collector 100 as in embodiment 1 or embodiment 2. The cell 210 is connected to the positive current collector 100. The battery 200 including the positive current collector 100 has all the beneficial effects of the positive current collector 100, which will not be described in detail here.
[0052] In all examples shown and described herein, any specific values should be interpreted as merely exemplary and not as limitations; therefore, other examples of exemplary embodiments may have different values.
[0053] The embodiments described above are merely examples of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of this utility model. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these modifications and improvements all fall within the protection scope of this utility model.
Claims
1. A positive current collector, characterized in that, include: A first region is provided with an injection hole, a first through-hole, and a fuse. An opening is formed between the two opposite ends of the first through-hole. The fuse is disposed at the opening and closes the opening. The injection hole is located between the first through-hole and the fuse. One side of the first region is electrically connected to the positive electrode of the battery cell. The second region is disposed around the outer periphery of the first region. The second region is connected to the circuit of the first region through the fuse, or the second region can be disconnected from the circuit of the first region through the fuse.
2. The positive current collector according to claim 1, characterized in that, The first through-hole is a "C" shaped structure, and the fused part is located at the opening of the first through-hole in the "C" shaped structure.
3. The positive current collector according to claim 2, characterized in that, The first through-hole and the fusible part are arranged around the outer circumferential direction of the injection hole, and the injection hole and the first through-hole are spaced apart.
4. The positive current collector according to claim 3, characterized in that, The injection hole is located at the center of the positive current collector.
5. The positive current collector according to claim 1, characterized in that, The second region has a through hole and a second through opening, and the through hole is connected to the first through opening through the second through opening.
6. The positive current collector according to claim 5, characterized in that, The number of through holes is multiple, and any one of the through holes can be connected to the first through hole through a second through port.
7. The positive current collector according to claim 5, characterized in that, Multiple second through openings are arranged around the first through opening in the circumferential direction.
8. The positive current collector according to claim 7, characterized in that, The first region also includes multiple welding sections, each of which is located between two adjacent second through openings, and the trajectory of the welding section is a curved structure.
9. The positive current collector according to any one of claims 1 to 8, characterized in that, The first region is a circular structure, and the second region is a ring-shaped structure. The first region is located at the center of the second region of the ring-shaped structure.
10. A battery, characterized in that, Includes the positive current collector as described in any one of claims 1 to 9.