Foldable lithium battery flexible electrode sheet connecting structure

Abstract

The utility model relates to the technical field of lithium battery production and manufacturing, specifically relates to a kind of foldable lithium battery flexible electrode sheet connecting structure, comprising: lithium battery ontology, lithium battery ontology is connected in series by flexible connector, and flexible connector includes graphene composite flexible conductive strip, and the surface of graphene composite flexible conductive strip is sleeved with flexible metal braid, and the surface of flexible metal braid is sleeved with insulating protective sleeve, and the both ends of graphene composite flexible conductive strip are fixedly connected with connecting piece, by the setting of flexible connector and elastic buffer structure, the combination of flexible connector and elastic buffer structure is used, can effectively adapt the deformation demand of lithium battery under different working conditions such as vibration, bending, avoid the fracture of connecting part due to stress concentration, improve the stability and reliability of lithium battery, by the setting of graphene composite flexible conductive strip and flexible metal braid, to improve the flexibility and conductive performance of flexible connector.

Description

Technical Field

[0001] This utility model relates to the field of lithium battery manufacturing technology, specifically to a foldable flexible electrode sheet connection structure for lithium batteries. Background Technology

[0002] Lithium batteries are a type of battery that uses lithium metal or lithium alloy as the positive and negative electrode materials and a non-aqueous electrolyte solution. Lithium batteries can be broadly divided into two categories: lithium metal batteries and lithium-ion batteries. With the development of science and technology, lithium batteries have become the mainstream.

[0003] Traditional lithium battery electrode plates mostly use rigid connection methods, such as welding or bolt fastening. During the use of lithium batteries, especially in some scenarios where the battery is subjected to vibration and bending mechanical forces, such as when the battery is bumped during the driving of an electric vehicle, the rigid connection structure is prone to breakage at the connection point due to stress concentration. This will interrupt the electrical connection between the electrode plates, reduce the charging and discharging performance of the lithium battery, and even cause battery failure.

[0004] As the application of lithium batteries in wearable devices and flexible electronic devices expands, batteries need to have a certain degree of flexibility to adapt to the bending and folding deformation of the devices. However, the existing connection structure cannot effectively follow the deformation of lithium batteries. When the battery deforms, the connection parts may become loose or fall off, affecting the normal operation of the battery. Utility Model Content

[0005] In view of the above-mentioned shortcomings of the existing technology, the present invention provides a foldable flexible electrode sheet connection structure for lithium batteries, which can effectively solve the problems mentioned in the background technology.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] This utility model provides a foldable flexible electrode sheet connection structure for lithium batteries, including: a lithium battery body, the lithium battery bodies being connected in series via a flexible connector, the flexible connector including a graphene composite flexible conductive strip, a flexible metal braided strip being sleeved on the surface of the graphene composite flexible conductive strip, an insulating protective sleeve being sleeved on the surface of the flexible metal braided strip, and connecting pieces being fixedly connected to both ends of the graphene composite flexible conductive strip.

[0008] Furthermore, a positive electrode connection post is fixedly connected to one side of the top of the lithium battery body, and a negative electrode connection post is fixedly connected to the other side of the top of the lithium battery body.

[0009] Furthermore, both the positive and negative terminal connection posts have threaded grooves on their surfaces, and a fixing knob is threaded onto the surface of the threaded grooves.

[0010] Furthermore, the connecting pieces at both ends of the graphene composite flexible conductive strip are respectively sleeved with the positive electrode connecting post and the negative electrode connecting post, and the connecting pieces are fixed to the connecting posts by a fixing knob.

[0011] Furthermore, an elastic buffer structure is provided at the connection between the connecting piece and the connecting post. The elastic buffer structure includes a metal spring and an elastic rubber pad.

[0012] Furthermore, the metal spring is located at the bottom of the connecting piece, and the elastic rubber pad is located at the top of the connecting piece.

[0013] Furthermore, a welding part is provided at the connection between the graphene composite flexible conductive strip and the connecting piece, and a nickel plating layer is provided on the surface of the welding part.

[0014] The technical solution provided by this utility model has the following advantages compared with the known prior art:

[0015] By incorporating flexible connectors and elastic buffer structures, the combination of flexible connectors and elastic buffer structures can effectively adapt to the deformation requirements of lithium batteries under different working conditions such as vibration and bending, avoiding breakage of the connection parts due to stress concentration, and improving the stability and reliability of lithium batteries.

[0016] By using graphene composite flexible conductive strips and flexible metal braided strips, the graphene composite flexible conductive strips utilize the high conductivity and excellent mechanical properties of graphene to combine with flexible polymer materials, thus possessing good flexibility and conductivity. The flexible metal braided strips are woven from multiple strands of fine metal wires, possessing good flexibility and tensile strength, which can effectively buffer the stress generated by the lithium battery when subjected to force while ensuring electrical connection.

[0017] By setting up the welding part, the two ends of the graphene composite flexible conductive strip are welded to the connecting piece to form a welding part during use. The surface of the welding part is treated with nickel plating to form a nickel plating layer, thereby enhancing the conductivity and corrosion resistance of the welding part.

[0018] By using a fixed knob, the connecting piece and the connecting post are secured together, greatly simplifying the lithium battery assembly process, reducing reliance on specialized equipment and technicians, and facilitating the maintenance and replacement of the lithium battery itself, thereby improving production efficiency and reducing maintenance costs. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the overall structure of a foldable flexible electrode sheet connection structure for lithium batteries according to this utility model.

[0021] Figure 2 This is a schematic diagram of the lithium battery body structure of a foldable flexible electrode sheet connection structure of a lithium battery according to the present invention.

[0022] Figure 3 This is a schematic diagram of the flexible connector structure of a foldable lithium battery flexible electrode sheet connection structure according to the present invention.

[0023] Figure 4 This is a schematic diagram of the cross-sectional structure of the flexible connector of the foldable lithium battery flexible electrode sheet connection structure of this utility model.

[0024] The labels in the diagram represent:

[0025] 1. Lithium battery body; 101. Positive electrode connecting post; 102. Negative electrode connecting post; 103. Threaded groove; 2. Flexible connector; 201. Graphene composite flexible conductive strip; 202. Flexible metal braided strip; 203. Insulating protective sleeve; 204. Connecting piece; 3. Welding part; 301. Nickel plating layer; 4. Elastic buffer structure; 401. Metal spring; 402. Elastic rubber pad; 5. Fixing knob. Detailed Implementation

[0026] 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, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0027] The present invention will be further described below with reference to the embodiments.

[0028] Example 1

[0029] Reference Figure 1-4This is the first embodiment of the present invention, which discloses a foldable flexible electrode sheet connection structure for lithium batteries, including: a lithium battery body 1, the lithium battery body 1 being connected in series through a flexible connector 2, the flexible connector 2 including a graphene composite flexible conductive strip 201, a flexible metal braided strip 202 being sleeved on the surface of the graphene composite flexible conductive strip 201, an insulating protective sleeve 203 being sleeved on the surface of the flexible metal braided strip 202, and connecting pieces 204 being fixedly connected to both ends of the graphene composite flexible conductive strip 201.

[0030] With the flexible connector 2 and the elastic buffer structure 4, the combination of the flexible connector 2 and the elastic buffer structure 4 can effectively adapt to the deformation requirements of the lithium battery under different working conditions such as vibration and bending, avoid the breakage of the connection part due to stress concentration, and improve the stability and reliability of the lithium battery.

[0031] With the addition of graphene composite flexible conductive strip 201 and flexible metal braided strip 202, the graphene composite flexible conductive strip 201 utilizes the high conductivity and excellent mechanical properties of graphene to be combined with flexible polymer materials, thus possessing good flexibility and conductivity. The flexible metal braided strip 202 is woven from multiple strands of fine metal wires, possessing good flexibility and tensile strength, which can effectively buffer the stress generated by the lithium battery when subjected to force while ensuring electrical connection.

[0032] Example 2

[0033] Reference Figure 1-4 This is the second embodiment of the present invention, which differs from the first embodiment in that:

[0034] A positive electrode connection post 101 is fixedly connected to one side of the top of the lithium battery body 1, and a negative electrode connection post 102 is fixedly connected to the other side of the top of the lithium battery body 1. Threaded grooves 103 are opened on the surfaces of both the positive electrode connection post 101 and the negative electrode connection post 102, and a fixed knob 5 is threadedly connected to the surface of the threaded groove 103.

[0035] By using the fixing knob 5, the connecting piece 204 can be fixed to the connecting post during use, which greatly simplifies the lithium battery assembly process, reduces the reliance on professional equipment and technicians, and facilitates the maintenance and replacement of the lithium battery body 1, thereby improving production efficiency and reducing maintenance costs.

[0036] The connecting pieces 204 at both ends of the graphene composite flexible conductive strip 201 are respectively sleeved with the positive electrode connecting post 101 and the negative electrode connecting post 102. The connecting pieces 204 and the connecting posts are fixed by the fixing knob 5. An elastic buffer structure 4 is provided at the connection between the connecting pieces 204 and the connecting posts. The elastic buffer structure 4 includes a metal spring 401 and an elastic rubber pad 402. The metal spring 401 is located at the bottom end of the connecting piece 204, and the elastic rubber pad 402 is located at the top end of the connecting piece 204. A welding part 3 is provided at the connection between the graphene composite flexible conductive strip 201 and the connecting piece 204. A nickel plating layer 301 is provided on the surface of the welding part 3.

[0037] By setting the welding part 3, the two ends of the graphene composite flexible conductive strip 201 are connected to the connecting piece 204 by welding to form the welding part 3 during use. The surface of the welding part 3 is treated with nickel plating to form a nickel plating layer 301, thereby enhancing the conductivity and corrosion resistance of the welding part 3.

[0038] The remaining structure is the same as that in Example 1.

[0039] The working principle of this utility model is as follows:

[0040] First, the lithium battery bodies 1 are arranged neatly in sequence. Then, the metal springs 401 are respectively fitted onto the surfaces of the positive electrode connecting post 101 and the negative electrode connecting post 102. Next, the connecting piece 204 is fitted onto the surface of the connecting post, and then the elastic rubber pad 402 is fitted onto the surface of the connecting post. Finally, the fixing knob 5 is threaded onto the surface of the connecting post and tightened. By setting the fixing knob 5, the connecting piece 204 is fixed to the connecting post during use, which greatly simplifies the assembly process of the lithium battery, reduces the dependence on professional equipment and technicians, facilitates the maintenance and replacement of the lithium battery bodies 1, improves production efficiency and reduces maintenance costs, thereby completing the series connection between the lithium battery bodies 1.

[0041] Secondly, by setting up the flexible connector 2 and the elastic buffer structure 4, the combination of the flexible connector 2 and the elastic buffer structure 4 can effectively adapt to the deformation requirements of the lithium battery under different working conditions such as vibration and bending, avoid the breakage of the connection part due to stress concentration, and improve the stability and reliability of the lithium battery. By setting up the graphene composite flexible conductive strip 201 and the flexible metal braided strip 202, the graphene composite flexible conductive strip 201 utilizes the high conductivity and excellent mechanical properties of graphene to be combined with flexible polymer materials, thus possessing good flexibility and conductivity. The flexible metal braided strip 202 is woven from multiple strands of fine metal wires, which has good flexibility and tensile strength, and can effectively buffer the stress generated by the lithium battery when it is subjected to force while ensuring electrical connection.

[0042] Finally, by setting the welding part 3, when in use, the two ends of the graphene composite flexible conductive strip 201 are connected to the connecting piece 204 by welding to form the welding part 3, and the surface of the welding part 3 is treated with nickel to form a nickel plating layer 301, thereby enhancing the conductivity and corrosion resistance of the welding part 3.

[0043] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the embodiments of this utility model.

Claims

1. A foldable flexible electrode sheet connection structure for lithium batteries, characterized in that, include: The lithium battery body is connected in series via a flexible connector. The flexible connector includes a graphene composite flexible conductive strip, a flexible metal braided strip is sleeved on the surface of the graphene composite flexible conductive strip, an insulating protective sleeve is sleeved on the surface of the flexible metal braided strip, and connecting pieces are fixedly connected to both ends of the graphene composite flexible conductive strip.

2. The foldable lithium battery flexible electrode sheet connection structure according to claim 1, characterized in that, A positive electrode connection post is fixedly connected to one side of the top of the lithium battery body, and a negative electrode connection post is fixedly connected to the other side of the top of the lithium battery body.

3. The foldable lithium battery flexible electrode sheet connection structure according to claim 2, characterized in that, Both the positive and negative electrode connecting posts have threaded grooves on their surfaces, and a fixing knob is threaded onto the surface of the threaded grooves.

4. The foldable lithium battery flexible electrode sheet connection structure according to claim 3, characterized in that, The connecting pieces at both ends of the graphene composite flexible conductive strip are respectively sleeved with the positive electrode connecting post and the negative electrode connecting post, and the connecting pieces are fixed to the connecting posts by a fixing knob.

5. The foldable lithium battery flexible electrode sheet connection structure according to claim 2, characterized in that, An elastic buffer structure is provided at the connection between the connecting piece and the connecting post. The elastic buffer structure includes a metal spring and an elastic rubber pad.

6. The foldable lithium battery flexible electrode sheet connection structure according to claim 5, characterized in that, The metal spring is located at the bottom end of the connecting piece, and the elastic rubber pad is located at the top end of the connecting piece.

7. The foldable lithium battery flexible electrode sheet connection structure according to claim 1, characterized in that, A welding section is provided at the connection between the graphene composite flexible conductive strip and the connecting piece, and a nickel plating layer is provided on the surface of the welding section.

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