Button lithium battery and production method thereof

Abstract

The present invention discloses a button-type lithium battery and a production method thereof, belonging to the technical field of lithium batteries. The key points of the technical solution are that it comprises a cover plate and a carrier, the internal space of the carrier is equally divided into a plurality of subspaces, each of the subspaces is provided with a current collector for charging and discharging, the cover plate is connected with an assembly module, the bottom of the carrier is provided with a conductive area, a plurality of the current collectors are connected to the conductive area, and each of the current collectors is provided with a pole ear; the current collector is used for charging and discharging; the assembly module enables the plurality of the current collectors to form a parallel structure with each other. This lithium battery structure can reduce the internal resistance of the lithium battery structure, reduce the heat generation, extend the service life, and save battery energy.

Description

Technical Field

[0001] The present invention relates to the technical field of lithium batteries, in particular to a button-type lithium battery and a production method thereof. Background Art

[0002] With the continuous advancement of science and technology in today's society, almost everyone has electronic products. As the power source of electronic products, batteries have higher performance requirements. With the increasing requirements for environmental protection and sustainable energy development, non-rechargeable batteries and batteries containing pollutants will gradually withdraw from the market. Green, environmentally friendly and high-performance secondary rechargeable batteries will become the first choice for consumer applications. Button lithium batteries are a type of lithium-ion battery, which belongs to the intersection of chemical power sources, energy, materials, electronics and other disciplines. Existing button batteries often have problems such as large internal resistance, high heat generation, and poor rate performance due to their small size. Users will discard them immediately when they find that the battery is underpowered, even if there is still some power in the battery, which will greatly waste battery resources. Summary of the invention

[0003] In view of the problems existing in the prior art, the purpose of the present invention is to provide a button-type lithium battery that can reduce the internal resistance of the lithium battery structure, reduce heat generation, extend the service life, and save battery energy.

[0004] The above technical objectives of the present invention are achieved through the following technical solutions:

[0005] The present invention provides a button-type lithium battery, comprising a cover plate and a loading body, wherein the internal space of the loading body is equally divided into a plurality of subspaces, each of the subspaces is provided with a current collecting member, an assembly module is connected to the cover plate, a conductive area is provided at the bottom of the loading body, a plurality of the current collecting members are connected to the conductive area, and a pole ear is provided on each of the current collecting members; the current collecting member is used to store and release electricity; the assembly module enables the plurality of the current collecting members to form a parallel structure with each other.

[0006] In some embodiments, a plurality of plug-in plates are disposed on the edge of the cover plate, and a card slot is opened on the carrier at a position corresponding to the position of the plug-in plates, and the plug-in plates are seamlessly plugged into the card slot.

[0007] In some embodiments, the current collecting part includes a loading box, a current collector is arranged in the loading box, a first conductive part is arranged at the end of the loading box, the first conductive part is connected to the assembly module, a second conductive part is arranged on the side of the loading box close to the loading body, one end of the current collector is connected to the first conductive part, and the other end is connected to the second conductive part.

[0008] In some embodiments, the assembly module includes a connecting column, a spring rod is disposed inside the connecting column, a terminal is disposed on the spring rod, a buffer pad is disposed at the bottom of the connecting column, and a hole is opened at the top of the connecting column for the terminal to protrude.

[0009] In some embodiments, a liquid injection port is provided on the carrier.

[0010] In some embodiments, a conductive cap is provided on the assembly module.

[0011] In some embodiments, a side of the first conductive portion close to the assembly module is a curved surface.

[0012] In some embodiments, the buffer pad is made of rubber.

[0013] The present invention also provides a button-type lithium battery production method for producing the above-mentioned lithium battery, comprising the following steps:

[0014] a. Place the current collector into the loading box, insert one end of the current collector into the first conductive portion, and insert the other end into the second conductive portion to complete the fixation;

[0015] b. Use laser film cutting technology to connect and fix the pole ear and the current collector to complete the assembly of each current collector;

[0016] c. The operator inserts each current collector into the assembly module, connects each current collector in parallel, and then connects the cover plate to the connecting column so that the lug of each current collector is connected to the cover plate;

[0017] d. Then connect the carrier and the cover together to complete the assembly;

[0018] e. Finally, the electrolyte is introduced into the battery and then sealed to complete the battery assembly.

[0019] In summary, the present invention has the following beneficial effects:

[0020] 1. Through the cooperation between the plug plate and the card slot, the cover plate and the carrier can be quickly and firmly connected, which is convenient for operators to quickly operate during disassembly and assembly. At the same time, the card slot can cooperate with the current collector. When troubleshooting, the card slot can fix the current collector and keep the current collector connected to the carrier without disconnection, ensuring the effectiveness of the fault investigation of the lithium battery structure;

[0021] Second, by providing multiple spaces in the loading body to place multiple current collectors, and using an assembly module to form a parallel structure between the multiple current collectors, the internal resistance of the entire lithium battery structure is reduced, the heat generated by the lithium battery structure is reduced, and the rate performance and safety performance of the entire lithium battery structure are enhanced. At the same time, each current collector is provided with a pole ear, which can shorten the movement path of electrons, reduce the heat generated by the battery, and can timely detect and replace the current collector, extend the battery life, ensure that the internal power of each current collector is fully released, so that the battery power is effectively utilized and battery resources are saved.

[0022] 3. By utilizing the cooperation of the terminal posts and spring rods in the assembly module, when the current collector is inserted into the connecting post, the terminal posts are received into the connecting post, thereby unifying the connection points of the lithium battery structure and avoiding affecting the line connection of the lithium battery structure. At the same time, when troubleshooting, after the current collector is taken out of the connecting post, the terminal posts and spring rods are utilized to make the terminal posts protrude out of the connecting post, thereby facilitating the operator to use the detection device to connect the current collector and the terminal post, and quickly detect the current collector that needs to be replaced, accurately and quickly, and replace and repair it in time during production, avoiding waste of resources, saving costs, and improving production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0024] Figure 2 An exploded view of the present invention;

[0025] Figure 3 It is a schematic diagram of a part of the structure of the present invention;

[0026] Figure 4 It is a schematic diagram of the overall structure of the current collecting member of the present invention;

[0027] Figure 5 It is a schematic diagram of the overall structure of the assembly module of the present invention.

[0028] In the figure: 1, cover plate; 11, conductive cap; 12, plug-in board; 2, carrier; 21, conductive area; 22, slot; 23, liquid filling port; 3, current collector; 31, loading box; 32, current collector; 33, pole ear; 34, second conductive part; 35, first conductive part; 4, assembly module; 41, connecting column; 42, terminal; 43, spring rod; 44, buffer pad. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] See also Figure 1-5 A button-type lithium battery comprises a cover plate 1 and a carrier 2, wherein the inner space of the carrier 2 is equally divided into a plurality of subspaces, each of which is provided with a current collecting member 3, an assembly module 4 is connected to the cover plate 1, a conductive area 21 is provided at the bottom of the carrier 2, a plurality of current collecting members 3 are connected to the conductive area 21, and a pole ear 33 is provided on each current collecting member 3; the current collecting member 3 is used for storing and releasing electricity; the assembly module 4 enables the plurality of current collecting members 3 to form a parallel structure with each other. First, the operator welds and fixes the assembly module 4 to the cover plate 1, and plugs each current collector 3 into the assembly module 4 to ensure that a parallel structure is formed between the five current collectors 3. Then, the carrier 2 and the cover plate 1 are connected and fixed to complete the assembly of the lithium battery structure. The pole ear 33 can connect the cover plate 1 and the current collector 3, so that the internal resistance of the current collector 3 is reduced, thereby reducing the internal resistance of the entire lithium battery structure, reducing heat generation, increasing the peak power of charging and discharging, and enhancing the rate performance and safety performance of the entire lithium battery structure. At the same time, the movement path of electrons is shortened, polarization is reduced, battery life is extended, and the energy density and cruising range of the battery are improved.

[0031] In some embodiments, a plurality of plug-in boards 12 are provided at the edge of the cover plate 1, and a card slot 22 is opened on the loading body 2 at a position corresponding to the position of the plug-in board 12. The plug-in board 12 and the card slot 22 are seamlessly plugged in. The operator firmly combines the cover plate 1 and the loading body 2 together through the plug-in board 12 and the card slot 22 to form a lithium battery shell. At the same time, the plug-in board 12 and the card slot 22 can be used for quick disassembly, which is convenient for disassembly and assembly, and fast for assembly, thereby improving the production speed. A conductive tape is provided at the card slot 22, which is connected to the conductive area 21. The conductive tape can be a copper foil tape, but is not limited thereto. It provides a connection path for the operator to subsequently detect faults of the current collector 3, and can also enhance the connection strength with the plug-in board 12, thereby improving the connection stability between the cover plate 1 and the loading body 2.

[0032] In some embodiments, the current collector 3 includes a loading box 31, a current collector 32 is arranged in the loading box 31, a first conductive part 35 is arranged at the end of the loading box 31, the first conductive part 35 is connected to the assembly module 4, and a second conductive part 34 is arranged on the side of the loading box 31 close to the carrier 2, one end of the current collector 32 is plugged into the first conductive part 35, and the other end is welded to the second conductive part 34. The operator places the current collector 32 in the loading box 31, and plugs the electrodes at both ends of the current collector 32 into the first conductive part 35 and the second conductive part 34 respectively, so as to fix the current collector 32, and connect it to the assembly module 4 through the first conductive part 35, and connect it to the assembly module 4 through the second conductive part 34 is connected to the carrier 2, and there are five current collectors 3. The number of current collectors 3 can be set according to usage requirements. The five current collectors 3 are plugged into the assembly module 4 to realize a parallel structure, thereby reducing the internal resistance of the entire lithium battery structure, improving the performance and efficiency of the lithium battery structure, and when a current collector 3 is damaged or the power is exhausted, the equipment will have insufficient power supply. After the operator detects the faulty current collector 3, a new current collector 3 is installed in parallel again, and the battery can continue to be used for power supply, extending the battery life. At the same time, it ensures that the power of each current collector 3 can be completely used up, so as to achieve effective utilization of battery energy and not waste resources.

[0033] In some embodiments, the assembly module 4 includes a connecting post 41, a spring rod 43 is arranged inside the connecting post 41, a terminal 42 is arranged on the spring rod 43, a buffer pad 44 is arranged at the bottom of the connecting post 41, and a hole is opened at the top of the connecting post 41 for the terminal 42 to protrude. When the operator inserts the current collector 3 into the connecting post 41, the connecting post 41 can connect the circuit and have a certain resistance. The first conductive part 35 of the current collector 3 squeezes the spring rod 43 to make the spring rod 43 shrink, and then the spring rod 43 drives the terminal 42 to move into the inside of the connecting post 41 and no longer protrude from the hole at the top of the connecting post 41, thereby not only allowing the first conductive part 35 to contact the terminal 42 and form an electric power path, but also avoiding the terminal 42 protruding from the hole during assembly, resulting in multiple terminals 42 appearing during use, affecting the connection of the entire battery circuit; when the battery fails or the power is exhausted, the operator removes the cover 1 and the current collector 3 from the carrier 2, taking one of them as an example, the operator takes out a current collector 3 from the connecting column 41, so that the corresponding terminal 42 is acted upon by the spring rod 43 as the current collector 3 leaves and protrudes out of the hole on the top of the connecting column 41, and then the current collector 3 is plugged into the card slot 22 to ensure that the current collector 3 is connected to the conductive area 21, and a current detection device is connected between the current collector 3 and the terminal 42, so that the current collector 3 and the current detection device are connected in series. The current detection device can be an ammeter, but is not limited to this. Finally, an electrical appliance is connected between the conductive area 21 and the terminal 42 for detection. If the current detection device detects that the current is very small, close to zero, it means that the current collector 3 is the source of the fault and needs to be replaced and repaired. If the current detection device detects current, it means that the current collector 3 is not the source of the fault, and the above operation needs to be repeated to check other current collectors 3 until the faulty current collector 3 is found. The detection is fast and convenient.

[0034] In some embodiments, a liquid injection port 23 is opened on the carrier 2. After the battery is assembled, the operator injects the electrolyte into the lithium battery from the liquid injection port 23, and then uses a steel ball or a metal conductive product to seal the liquid injection port 23 to achieve lithium battery packaging, which is convenient and safe, and improves the reliability of the lithium battery.

[0035] In some embodiments, a conductive cap 11 is provided on the assembly module 4. When the lithium battery is being produced, after the operator inserts the first conductive portion 35 of the loading box 31 in the current collector 3 into the connecting post 41, the terminal 42 of the connecting post 41 is immersed in the hole and no longer pushed out. The operator can buckle the conductive cap 11 on the end of the connecting post 41 for subsequent use and to avoid the terminal 42 being pushed out and hindering the placement and installation of the battery.

[0036] In some embodiments, the conductive cap 11 is connected to the connecting column 41 by threads, and the operator can use the threads to tighten the conductive cap 11 and the connecting column 41, so that the operator can easily and quickly disassemble and assemble the conductive cap 11 whether installing it on the connecting column 41 or removing it from the connecting column 41, without having to use great force to pull it out, thereby avoiding damaging the connecting column 41, rendering the lithium battery unusable and affecting the service life of the lithium battery.

[0037] In some embodiments, the side of the first conductive part 35 close to the assembly module 4 is an arc surface, and the arc surface on one side of the first conductive part 35 can fit tightly with the connecting column 41 in the assembly module 4, ensuring that the electrical connection between the first conductive part 35 and the connecting column 41 is stable, so that the battery can operate normally, improve the stability of current transmission, and allow the equipment using the lithium battery structure to operate stably, ensuring the service life of the equipment.

[0038] In some embodiments, the buffer pad 44 is made of rubber material. The buffer pad 44 can not only prevent the operator from scratching the carrier 2 by applying excessive force when assembling the carrier 2 and the cover plate 1, but also increase the friction between the carrier 2 and the cover plate 1, thereby playing a role in stable positioning. When sealing the injection port 23, it can also prevent the sealing member used to seal the injection port 23 from sliding, thereby accelerating the injection of electrolyte and improving assembly efficiency. At the same time, the rubber material can prevent the carrier 2 and the cover plate 1 from forming a conductive path, thereby destroying the internal circuit of the battery and causing damage to the battery.

[0039] To sum up, the present invention divides each area in the lithium battery structure to store the current collector 3, and uses the collection module 4 to connect each current collector 3 in parallel, thereby reducing the internal resistance of each current collector 3, so that the internal resistance of the entire lithium battery structure is also reduced, so that the heat generation of the entire lithium battery structure is reduced, which not only improves the peak power of charging and discharging, but also enhances the rate performance and safety performance of the entire lithium battery structure. At the same time, the parallel connection of each current collector 3 allows the equipment using this lithium battery structure to use this lithium battery structure in daily work. When a single current collector 3 fails or runs out of power and the power supply is insufficient, the operator only needs to take out the current collector 3 from the collection module 4 one by one and connect the current detection device between the two to troubleshoot the fault, which is convenient and quick, and the battery can continue to work after replacing the new current collector 3, ensuring that the power of each current collector 3 can be fully used up, thereby extending the battery life, reducing resource waste, and saving costs.

[0040] A method for producing a button-type lithium battery, used to produce the above-mentioned lithium battery, comprises the following steps:

[0041] a. Place the current collector 32 into the loading box 31, and insert one end of the current collector 32 into the first conductive portion 35, and the other end into the second conductive portion 34 to complete the fixation;

[0042] b. Using laser film cutting technology to connect and fix the pole ear 33 and the current collector 32 to complete the assembly of each current collector 3;

[0043] c. The operator inserts each current collector 3 into the connecting column 41, connects each current collector 3 in parallel, and then welds the cover plate 1 to the connecting column 41, so that the lug 33 of each current collector 3 is connected to the cover plate 1;

[0044] d. Then, the carrier 2 and the cover plate 1 are connected together through the cooperation of the card slot 22 and the plug plate 12 to complete the assembly;

[0045] e. Finally, the conductive cap 11 is buckled onto the end of the connecting column 41, and then the electrolyte is introduced into the battery through the injection port 23, and then sealed to complete the assembly of the battery.

[0046] This specific embodiment is merely an explanation of the present invention and is not a limitation of the present invention. After reading this specification, those skilled in the art may make non-creative modifications to the present embodiment as needed. However, as long as they are within the scope of the claims of the present invention, they are protected by the patent law.

Claims

1. A button lithium battery, characterized in that: Comprising a cover plate (1) and a loading body (2), the internal space of the loading body (2) being equally divided into a plurality of sub-spaces, each of the sub-spaces being provided with a current collecting member (3), the cover plate (1) being connected to a collection module (4), a conductive area (21) being provided at the bottom of the loading body (2), a plurality of the current collecting members (3) being connected to the conductive area (21), each of the current collecting members (3) being provided with a pole ear (33), the pole ear (33) connecting the cover plate (1) and the current collecting member (3); The current collecting member (3) is used to store and release electricity; The assembly module (4) enables the plurality of current collecting members (3) to form a parallel structure with each other; The current collector (3) comprises a loading box (31), a current collector (32) is arranged in the loading box (31), a first conductive part (35) is arranged at an end of the loading box (31), the first conductive part (35) is connected to the assembly module (4), a second conductive part (34) is arranged on a side of the loading box (31) close to the loading carrier (2), the second conductive part (34) is connected to the loading carrier (2), one end of the current collector (32) is connected to the first conductive part (35), and the other end of the current collector (32) is connected to the second conductive part (34); The assembly module (4) comprises a connecting column (41), a spring rod (43) is arranged inside the connecting column (41), a terminal (42) is arranged on the spring rod (43), a buffer pad (44) is arranged at the bottom of the connecting column (41), and a hole is opened at the top of the connecting column (41) for the terminal (42) to protrude; During the assembly of the button-type lithium battery, when the current collector (3) is inserted into the connecting post (41), the connecting post (41) is connected to the circuit, and the first conductive portion (35) of the current collector (3) presses the spring rod (43) to cause the spring rod (43) to contract, and then the spring rod (43) drives the terminal (42) to move into the interior of the connecting post (41) and no longer protrude out of the hole at the top of the connecting post (41), thereby causing the first conductive portion (35) to contact the terminal (42) and form an electric power path.

2. A button-type lithium battery according to claim 1, characterized in that: A plurality of plug-in plates (12) are arranged at the edge of the cover plate (1), and a card slot (22) is provided on the carrier (2) at a position corresponding to the position of the plug-in plates (12), and the plug-in plates (12) and the card slot (22) are seamlessly plugged into each other.

3. A button-type lithium battery according to claim 1, characterized in that: The carrier (2) is provided with a liquid injection port (23).

4. A button-type lithium battery according to claim 1, characterized in that: The assembly module (4) is provided with a conductive cap (11).

5. The button-type lithium battery according to claim 1, characterized in that: A side of the first conductive portion (35) close to the assembly module (4) is a curved surface.

6. A button-type lithium battery according to claim 1, characterized in that: The buffer pad (44) is made of rubber.

7. A method for producing a button-type lithium battery, for producing the button-type lithium battery as claimed in claim 1, characterized in that: The steps include: a. placing the current collector (32) into the loading box (31), and inserting one end of the current collector (32) into the first conductive portion (35), and the other end into the second conductive portion (34), to complete the fixation; b. Using laser film cutting technology to connect and fix the tab (33) to the current collector (32), and complete the assembly of each current collector (3); c. The operator inserts each current collecting member (3) into the assembly module (4), connects each current collecting member (3) in parallel, and then connects the cover plate (1) to the connecting column (41), so that the pole ear (33) of each current collecting member (3) is connected to the cover plate (1); d. Then connect the carrier (2) and the cover (1) together to complete the assembly; e. Finally, the electrolyte is introduced into the battery and then sealed to complete the battery assembly.

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