Recyclable battery

Abstract

The utility model relates to the technical field of batteries, in particular to a recyclable battery. According to the technical scheme, the battery is characterized by comprising a shell, a battery cell, a positive electrode cap and a negative electrode cap, the battery cell is arranged in the shell, the positive electrode cap and the negative electrode cap are arranged at the two ends of the shell respectively, the positive electrode cap is connected with the battery cell through a positive electrode lug, a connecting piece is arranged on the positive electrode cap and provided with an arc-shaped guide face, and the arc-shaped guide face is provided with a through hole. One end of the positive pole lug is fixedly connected with the positive pole cap and is sequentially attached to the positive pole cap and the arc-shaped guide surface, and the positive pole lug is provided with a telescopic first buffer section, so that the problem of loosening of the pole lug can be reduced, and the product quality is optimized and improved.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to a recyclable battery. Background Art

[0002] Recyclable batteries, also known as rechargeable batteries, have the advantages of being economical, environmentally friendly, and having sufficient power. They are widely used in the field of household appliances, such as electric toys, game controllers, smart door locks, and body fat scales. As more intelligent household appliances are introduced, rechargeable batteries are gradually becoming the choice of more users and have great development space in the future.

[0003] At present, recyclable batteries usually include a shell, a battery cell, a positive cap and a negative cap. The battery cell is arranged inside the shell, and the positive cap and the negative cap are respectively installed at the two ends of the shell. The two parts of the battery cell are connected to the positive cap and the negative cap respectively by adding tabs. The battery structure is formed by injecting electrolyte into the shell.

[0004] Regarding the above-mentioned related technologies, in actual application, the battery is currently subjected to impact from being dropped during use or the tab is pulled during installation, which may cause the solder joint between the tab and the positive cap to loosen or even break, so further optimization and improvement are needed. Utility Model Content

[0005] In order to solve the problem of tab loosening, the present application provides a recyclable battery.

[0006] The present application provides a recyclable battery that adopts the following technical solution:

[0007] A recyclable battery comprises a shell, a battery cell, a positive electrode cap and a negative electrode cap, wherein the battery cell is arranged inside the shell, and the positive electrode cap and the negative electrode cap are respectively arranged at both ends of the shell. The positive electrode cap is connected to the battery cell through a positive electrode ear, and the positive electrode cap is provided with a connector, and the connector has an arc-shaped guide surface. One end of the positive electrode ear is fixedly connected to the positive electrode cap and sequentially fits with the positive electrode cap and the arc-shaped guide surface, and the positive electrode ear is provided with a retractable first buffer section.

[0008] By adopting the above technical solution, the connector can make the connection position between the positive electrode ear and the positive electrode cap smoother, reduce the stress concentration caused by excessive bending, and prevent the weld from loosening and breaking when the battery falls or hits. At the same time, the first buffer section can resist impact and vibration by stretching and absorbing energy, thereby improving the stability of the positive electrode ear connection and making it less likely to fall off.

[0009] Preferably, the first buffer section includes a plurality of bending portions connected in sequence, and the plurality of bending portions constitute a telescopic joint.

[0010] By adopting the above technical solution, the positive electrode ear is bent to form a reciprocatingly bent expansion joint, which can well buffer and absorb energy, is easy to manufacture, and has a significant buffering effect.

[0011] Preferably, an arc-shaped groove having a size matching that of the positive electrode tab is provided through the connecting member, an inner wall of the arc-shaped groove forms the arc-shaped guide surface, and the positive electrode tab is provided in the arc-shaped groove.

[0012] By adopting the above technical solution, the arc-shaped groove can be used for the positive electrode ear to be inserted and installed during installation, thereby achieving a positioning effect and making assembly easier and faster.

[0013] Preferably, the positive electrode ear further includes a clamping section, which is connected to the first buffer section and is located on a side of the first buffer section away from the positive electrode cap. The clamping section includes a first arm and a second arm respectively fixedly attached to opposite sides of the battery cell.

[0014] By adopting the above technical solution, the clamping section connects and fixes the opposite sides of the battery cell through the first arm and the second arm, and the connection method adopts surface connection, which has high connection strength and is not easy to break or loosen, and the connection stability between the two is optimized and improved.

[0015] Preferably, there is an arc transition between the first buffer section and the clamping section.

[0016] By adopting the above technical solution, the arc transition can enhance the connection strength between the first buffer section and the clamping section, and the structural stability is further optimized and improved.

[0017] Preferably, the portion of the positive electrode tab located between the connector and the battery cell is parallel to the length direction of the battery.

[0018] By adopting the above technical solution, by arranging the part of the positive electrode ear between the connector and the battery cell parallel to the length direction of the battery, the tilting deviation of the positive electrode ear can be reduced, thereby reducing excessive bending of the positive electrode ear compared to the connector and the battery cell, and the risk of breakage is further reduced.

[0019] Preferably, the negative electrode cap is connected to the battery cell through a negative electrode ear, and the negative electrode ear includes a first fitting portion fitted and connected to the battery cell and a second fitting portion connected to the negative electrode cap, and the first fitting portion and the second fitting portion are connected by a bending portion, and the bending portion is used to accommodate the negative electrode ear between the shell, the battery cell and the negative electrode cap.

[0020] By adopting the above technical solution, under the action of the first fitting portion and the second fitting portion, the negative electrode ear can be firmly connected to the battery cell and the negative electrode cap. At the same time, the bending portion can fold the negative electrode ear into the narrow space between the outer shell, the battery cell and the negative electrode cap, and the connection is firm and the structure is compact.

[0021] Preferably, a retractable second buffer section is provided on the bending portion.

[0022] By adopting the above technical solution, the second buffer section can resist impact and vibration by stretching and absorbing energy, the stability of the negative electrode ear during connection is improved, and it is not easy to fall off.

[0023] In summary, this application includes at least one of the following beneficial technical effects:

[0024] 1. The connector can make the connection between the positive tab and the positive cap smoother, reduce the stress concentration caused by excessive bending, and prevent the solder joint from loosening or breaking when the battery is dropped or impacted. At the same time, the first buffer section can resist impact and vibration by stretching and absorbing energy. The stability of the positive tab connection is improved, and it is not easy to fall off. The probability of the tab falling off is reduced, and the product quality is optimized and improved.

[0025] 2. By setting the first buffer section as a bent structure, the positive electrode ear can form an expansion joint that can buffer and absorb energy. The expansion joint can make the positive electrode ear resist impact and stretching, with a significant buffering effect, and the structural stability of the positive electrode ear is optimized and improved;

[0026] 3. Under the action of the first and second fitting parts, the negative electrode ear can be firmly connected to the battery cell and the negative electrode cap, and the bending part can fold the negative electrode ear into the narrow space between the shell, the battery cell and the negative electrode cap, so that the connection is firm and the structure is compact. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a structural diagram of a recyclable battery in a preferred embodiment of the present application.

[0028] Figure 2 It is a cross-sectional view of a recyclable battery in a preferred embodiment of the present application.

[0029] Figure 3 It is a cross-sectional view of a battery cell and a positive electrode tab in a preferred embodiment of the present application.

[0030] Figure 4 It is a structural diagram of the battery cell and the positive electrode ear in a preferred embodiment of the present application.

[0031] Explanation of the accompanying drawings: 1. Shell; 2. Battery cell; 3. Positive electrode cap; 4. Negative electrode cap; 5. Positive electrode ear; 51. Clamping section; 511. First arm; 512. Second arm; 52. First buffer section; 6. Negative electrode ear; 61. First fitting portion; 62. Second fitting portion; 63. Second buffer section; 7. Connector; 71. Arc-shaped groove; 8. Arc-shaped guide surface. DETAILED DESCRIPTION

[0032] The following is combined with Figure 1-4 This application is described in further detail.

[0033] The present application discloses a recyclable battery. Figure 1 and Figure 2 The circulating battery includes a shell 1, a battery cell 2, a positive electrode cap 3 and a negative electrode cap 4; wherein the shell 1 is usually a cylindrical shell structure, the interior of the shell 1 is hollow, and the battery cell 2 is arranged in the hollow interior of the shell 1; the battery cell 2 plays the role of storing electrical energy, and it usually includes a positive electrode sheet, a diaphragm and a negative electrode sheet stacked in sequence, and the diaphragm is used to separate the positive electrode sheet and the negative electrode sheet to avoid contact and short circuit between the two; in addition, the positive electrode cap 3 and the negative electrode cap 4 are respectively installed at both ends of the shell 1, and the battery cell 2 is sealed inside the shell 1 by a sealed connection. At the same time, in order to realize the closed loop of the circuit, the positive electrode sheet of the battery cell 2 is connected to the positive electrode cap 3 through the positive electrode ear 5, and the negative electrode sheet of the battery cell 2 is connected to the negative electrode cap 4 through the negative electrode ear 6, thus forming a complete battery structure, and the specific structure of the battery will not be described here.

[0034] Based on the above solution, during the battery manufacturing process, it is first necessary to pre-install the positive electrode ear 5 and the negative electrode ear 6 on the battery cell 2, and then install the positive electrode ear 5 and the negative electrode ear 6 on the corresponding electrode caps, and finally install the positive electrode cap 3 and the negative electrode cap 4 on the outer shell 1.

[0035] However, under actual production conditions, since the positive tab 5 and the negative tab 6 are relatively thin in structure, they are prone to breakage. If the positive tab 5 and the negative tab 6 are pulled during installation, the solder joints at the connection between the positive tab 5 and the battery cell 2 and the connection between the negative tab 6 and the battery cell 2 are likely to loosen, resulting in defective products. In addition, when the battery is dropped from a high place, the impact force may also break the solder joint between the positive tab 5 and the positive cap 3, as well as the solder joint between the negative tab 6 and the negative cap 4. Therefore, the problem of loose tabs still needs to be solved.

[0036] Reference Figure 2To enhance the connection strength between the positive tab 5, the positive cap 3, and the battery cell 2, in this embodiment, the connections at both ends of the positive tab 5 are optimized and enhanced, thereby improving the overall stability of the tab connection. The positive cap 3 is provided with a connector 7, which is also provided with an arc-shaped guide surface 8. One end of the positive tab 5 passes through the connector 7 and is fixedly connected to the positive cap 3. The positive tab 5 is also in contact with the positive cap 3 and the arc-shaped guide surface 8.

[0037] Based on the above arrangement, in a conventional arrangement, the end of the positive ear 5 is usually fixed directly in the positive cap 3. At this time, after the positive cap 3 is fixed to the housing 1, the positive ear 5 will bend significantly, which will cause stress concentration at the bent portion, and may apply a stress that causes the weld to warp. In this solution, under the guidance of the connector 7, the transition between the positive ear 5 and the positive cap 3 can be smoother, which can reduce the stress concentration caused by excessive bending, so that the weld is not easy to loosen or break when the battery is dropped or hit.

[0038] Furthermore, when the connector 7 is actually set up, it can be made of metal and be integrally connected to the positive cap 3 to meet the conductivity requirements. Under this setting, even if the weld between the positive ear 5 and the positive cap 3 is broken and separated, the positive ear 5 can still be connected to the positive cap 3 through the connector 7, so that the structural reliability is optimized and improved; in addition, in order to improve the fitting effect between the positive ear 5 and the arc-shaped guide surface 8, an arc-shaped groove 71 with a size that matches the positive ear 5 can be provided through the connector 7. At this time, during the installation of the positive ear 5, the positive ear 5 can be first inserted into the arc-shaped groove 71, and then the positive ear 5 can be welded to the positive cap 3 to achieve the installation of the positive ear 5.

[0039] In the above process, the arc-shaped groove 71 plays a positioning role, making the installation of the positive electrode ear 5 more convenient and quick. At the same time, the inner wall of the arc-shaped groove 71 forms a guiding surface. When the positive electrode ear 5 is inserted into the arc-shaped groove 71, the opposite sides of the positive electrode ear 5 respectively abut against the groove wall of the arc-shaped groove 71, thereby obtaining arc-shaped guidance from the arc-shaped guiding surface 8, making the structure more compact and the contact better.

[0040] It is understandable that factors affecting the installation stability of the positive electrode tab 5 also include the connection stability between the positive electrode tab 5 and the battery cell 2. Figure 3 To improve the connection stability between the positive tab 5 and the battery cell 2, the positive tab 5 further includes a clamping section 51. The clamping section 51 is located at the end of the positive tab 5 away from the positive cap 3. The clamping section 51 includes a first arm 511 and a second arm 512 that are bifurcated. When connected, the first arm 511 and the second arm 512 are attached to opposite sides of the positive electrode sheet of the battery cell 2, and the first arm 511 and the second arm 512 are fixedly connected to the positive electrode sheet by welding.

[0041] Based on the above arrangement, double-sided connection is achieved, the connection strength is high, and it is not easy to break or loosen, and the connection stability between the positive electrode ear 5 and the positive electrode sheet is optimized and improved.

[0042] Continue to refer to Figure 2 In order to further enhance the ability of the positive electrode ear 5 to resist vibration and impact, a retractable first buffer section 52 is provided on the positive electrode ear 5. The first buffer section 52 is located in the middle of the positive electrode ear 5. The clamping section 51 is connected to the first buffer section 52 and is located on the side of the first buffer section 52 away from the positive electrode cap 3. The first buffer section 52 includes several bent sections connected in sequence, and the several bent sections form a wave-shaped expansion joint. Through the above arrangement, the first buffer section 52 can resist impact and vibration by expanding and contracting to absorb energy, so that the expansion joint can effectively play a buffering and energy absorption effect.

[0043] Optional, see Figure 4 , there is an arc transition between the first buffer section 52 and the clamping section 51; the arc transition can enhance the connection strength between the first buffer section 52 and the clamping section 51, and the structural stability is further optimized and improved.

[0044] In addition, in conventional settings, due to the structural layout, the positive electrode tab 5 is excessively tilted and offset. It should be explained that the offset referred to here can be understood as the angular offset of the positive electrode tab 5 compared to the central axis of the battery; at this time, if the above-mentioned angular offset is too large, it will cause the positive electrode tab 5 to tilt and stretch, and the end of the positive electrode tab 5 will form an angle and bend when connected, which increases the possibility of breakage.

[0045] To overcome the above problems, refer to Figure 2 In this embodiment, the connector 7 is arranged in the middle of the positive electrode cap 3, and the connection point between the positive electrode ear 5 and the battery cell 2 is close to the central axis of the battery. In this way, the portion of the positive electrode ear 5 between the connector 7 and the battery cell 2 is parallel to the length direction of the battery, which can reduce the tilt offset of the positive electrode ear 5, thereby reducing the excessive bending of the positive electrode ear 5 compared to the connector 7 and the battery cell 2, and further reducing the risk of breakage.

[0046] Continue to refer to Figure 2After solving the problem of connection stability of the positive tab 5, the connection stability of the negative tab 6 also needs to be optimized and improved. In conventional settings, there is usually a large gap between the battery cell 2 and the positive cap 3, so the above connection method can be adopted. In the negative electrode part, the space between the battery cell 2 and the negative cap 4 is relatively narrow; based on this, the negative cap 4 and the battery cell 2 are connected through a negative tab 6, and the negative tab 6 includes a first fitting portion 61 that is fitted and connected to the battery cell 2 and a second fitting portion 62 that is connected to the negative cap 4. Usually, the first fitting portion 61 can be fixedly connected to the battery cell 2 by welding, and the second fitting portion 62 can be fixedly connected to the negative cap 4 by welding. In this way, the negative tab 6 can be firmly connected to the battery cell 2 and the negative cap 4.

[0047] In addition, the first fitting portion 61 and the second fitting portion 62 are connected by a bending portion to form an L-shaped bending structure. The bending portion can accommodate the negative electrode ear 6 in the narrow space between the shell 1, the battery cell 2 and the negative electrode cap 4, and the connection is stable and the structure is compact.

[0048] Furthermore, in order to improve the connection stability of the negative electrode ear 6, a retractable second buffer segment 63 is provided on the bent portion. The structure of the second buffer segment 63 is consistent with that of the first buffer segment 52 and will not be described in detail here. It can also resist impact and vibration by absorbing energy by stretching. The stability of the negative electrode ear 6 during connection is improved, and it is not easy to fall off. The connection stability of the negative electrode ear 6 is optimized and improved.

[0049] The implementation principle of a recyclable battery in an embodiment of the present application is as follows: on the one hand, by providing a connector 7, a smooth transition is made between the positive electrode tab 5 and the positive electrode cap 3, so as to reduce the stress at the connection position between the positive electrode tab 5 and the positive electrode cap 3, making the connection more stable and not easy to break or loosen; and under the double-sided bonding connection action of the clamping section 51, the connection stability between the positive electrode tab 5 and the battery cell 2 is also improved, and the overall connection strength of the positive electrode tab 5 is improved, and it is not easy to loosen.

[0050] On the other hand, by providing a bending portion on the negative electrode ear 6, the negative electrode ear 6 can be formed into an L-shaped structure, so that the negative electrode ear 6 can be arranged in the narrow space between the shell 1, the battery cell 2 and the negative electrode cap 4, and the first fitting portion 61 and the second fitting portion 62 can also be installed in a surface-fit connection manner, and the connection stability is good. In addition, under the action of the second buffer section 63, the negative electrode ear 6 can also resist impact movement by stretching and absorbing energy, and the stability of the negative electrode ear 6 when connected is optimized and improved as a whole.

[0051] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A recyclable battery, comprising a housing (1), a battery cell (2), a positive electrode cap (3) and a negative electrode cap (4), wherein the battery cell (2) is arranged inside the housing (1), the positive electrode cap (3) and the negative electrode cap (4) are respectively arranged at two ends of the housing (1), and the positive electrode cap (3) and the battery cell (2) are connected via a positive electrode ear (5), characterized in that: The positive electrode cap (3) is provided with a connecting piece (7), and the connecting piece (7) has an arc-shaped guide surface (8). One end of the positive electrode ear (5) is fixedly connected to the positive electrode cap (3) and sequentially fits the positive electrode cap (3) and the arc-shaped guide surface (8). The positive electrode ear (5) is provided with a retractable first buffer section (52).

2. A recyclable battery according to claim 1, characterized in that: The first buffer section (52) comprises a plurality of bending portions connected in sequence, and the plurality of bending portions constitute a telescopic joint.

3. A recyclable battery according to claim 1, characterized in that: The connecting member (7) is provided with an arc-shaped groove (71) whose size matches that of the positive electrode tab (5). The inner wall of the arc-shaped groove (71) forms the arc-shaped guide surface (8), and the positive electrode tab (5) is inserted into the arc-shaped groove (71).

4. A recyclable battery according to claim 1, characterized in that: The positive electrode ear (5) further comprises a clamping section (51), the clamping section (51) being connected to the first buffer section (52) and being located on a side of the first buffer section (52) away from the positive electrode cap (3), the clamping section (51) comprising a first support arm (511) and a second support arm (512) respectively fixedly attached to opposite sides of the battery cell (2).

5. A recyclable battery according to claim 4, characterized in that: There is an arc transition between the first buffer section (52) and the clamping section (51).

6. The recyclable battery according to claim 1, characterized in that: The portion of the positive electrode tab (5) located between the connector (7) and the battery core (2) is parallel to the length direction of the battery.

7. The recyclable battery according to claim 1, characterized in that: The negative electrode cap (4) is connected to the battery cell (2) via a negative electrode ear (6), and the negative electrode ear (6) includes a first fitting portion (61) fitted and connected to the battery cell (2) and a second fitting portion (62) connected to the negative electrode cap (4), and the first fitting portion (61) and the second fitting portion (62) are connected via a bending portion, and the bending portion is used to accommodate the negative electrode ear (6) between the housing (1), the battery cell (2) and the negative electrode cap (4).

8. A recyclable battery according to claim 7, characterized in that: A telescopic second buffer section (63) is provided on the bending portion.

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