Lithium-manganese cylindrical flexible package battery structure

Abstract

The utility model discloses a lithium manganese cylindrical flexible package battery structure, and particularly relates to the technical field of battery structures, the lithium manganese cylindrical flexible package battery structure comprises a cylindrical shell, a cylindrical battery cell is arranged in the cylindrical shell, the cylindrical battery cell comprises a positive plate and a negative plate, and the negative plate and the positive plate are separated by a diaphragm and are wound together. An electrolyte is arranged between the cylindrical battery cell and the cylindrical shell, a positive electrode cap is fixedly arranged at the top end of the cylindrical shell, a positive electrode current collector is fixedly arranged at the bottom end of the positive electrode cap, the bottom end of the positive electrode current collector extends into the cylindrical battery cell, a negative electrode current collector is fixedly arranged on the inner wall of the bottom end of the cylindrical shell, and a negative electrode is fixedly arranged on the inner wall of the bottom end of the cylindrical shell. And the negative current collector is in contact with the negative plate. The polymer switch plays a role in power-off protection, and the flame retardant in the reinforcing sleeve and the flame-retardant cavity further plays roles in reinforcing and flame retardance, so that the safety of the lithium-manganese battery can be improved, and the lithium-manganese battery is prevented from exploding at high temperature to influence the conductive efficiency.

Description

Technical Field

[0001] The utility model relates to the technical field of battery structures, and more specifically to a lithium manganese cylindrical soft-packaged battery structure. Background Art

[0002] A cylindrical lithium manganese battery is a battery with lithium as the negative electrode and manganese oxide as the positive electrode. This kind of battery belongs to a primary battery, that is, the commonly said dry battery. The existing lithium manganese batteries mainly have the following characteristics: high energy density, long service life, wide operating temperature range, no memory effect, etc. The main application fields of lithium manganese batteries include electronic watches, calculators, small electronic devices, medical devices, and wireless sensor networks, etc.

[0003] Due to the large energy of the cylindrical lithium manganese battery, the short-circuit current is particularly large. Therefore, a PTC (polymer switch) needs to be built into this kind of battery. When the battery is short-circuited or overheated, the current will be cut off to protect the battery. For example, a new type of cylindrical lithium manganese battery with the publication number of CN203562472U in the prior art. In this prior art, since the polymer switch (PTC) is built into the battery cell and is welded to the explosion-proof film chassis and the positive electrode plate, there is no such extrusion force as in the previous lithium manganese batteries. The strip-shaped PTC can freely expand and deform, quickly act to protect the battery, and is safer to use.

[0004] However, the above-mentioned prior art still has the following problems when in use: Since the lithium manganese battery is cylindrical, when the lithium manganese battery is placed flat, it is unstable. The rolling of the lithium manganese battery will not only cause it to fall, but in severe cases, it will collide and explode, thereby affecting the use safety. And when lithium manganese batteries are spliced, they are usually closely attached together, which seriously affects heat dissipation, and thus will also reduce the use safety of lithium manganese batteries. Based on this, the utility model provides a lithium manganese cylindrical soft-packaged battery structure, which plays the roles of stable placement, improved safety, and convenient heat dissipation. Summary of the Utility Model

[0005] In order to overcome the above-mentioned defects of the prior art, the utility model provides a lithium manganese cylindrical soft-packaged battery structure. The reinforcement sleeve and the flame retardant in the flame retardant cavity play the roles of reinforcement and flame retardance, which can improve the safety of the lithium manganese battery. At the same time, multiple arc-shaped plates make the lithium manganese battery stably placed, avoiding the explosion caused by the rolling and falling of the lithium manganese battery. And the cooperation of the arc-shaped plate and the positioning rod keeps a separation between adjacent two lithium manganese batteries, so as to facilitate air circulation and avoid the influence of heat dissipation caused by the adhesion of lithium manganese batteries, so as to solve the problems appearing in the above-mentioned background art.

[0006] To achieve the above object, the present utility model provides the following technical solution: A lithium manganese cylindrical soft-packaged battery structure, including a cylindrical housing, a cylindrical battery core is provided inside the cylindrical housing, the cylindrical battery core includes a positive electrode sheet and a negative electrode sheet, the negative electrode sheet and the positive electrode sheet are separated by a separator and wound together, an electrolyte is provided between the cylindrical battery core and the cylindrical housing, a positive electrode cap is fixedly provided at the top end of the cylindrical housing, a positive electrode current collector is fixedly provided at the bottom end of the positive electrode cap, and the bottom end of the positive electrode current collector extends into the cylindrical battery core. A negative electrode current collector is fixedly provided on the inner wall of the bottom end of the cylindrical housing, and the negative electrode current collector is in contact with the negative electrode sheet.

[0007] A reinforcing sleeve is fixedly sleeved on the outer wall of the cylindrical housing, and a plurality of flame-retardant cavities are provided inside the reinforcing sleeve. Each flame-retardant cavity is filled with a flame retardant. Specifically, the flame retardant is a chemical additive used to improve the fire resistance of materials. Its function is to delay or prevent the combustion process of materials when they come into contact with flames or high temperatures, thereby increasing the safety of materials and reducing the fire risk. A plurality of grooves one and a plurality of grooves two are provided on the outer surface of the reinforcing sleeve. A positioning rod is fixedly provided on the inner wall of the bottom end of each groove two. An arc-shaped plate is hinged inside each groove one. A positioning hole is provided on the arc-shaped plate, and the positioning rod is inserted into the positioning hole. A clamping component for fixing the positioning rod is provided on the arc-shaped plate.

[0008] In a preferred embodiment, a clamping groove is provided on each positioning rod. The clamping component includes a sleeve. A plurality of sleeves are respectively fixedly penetrated through a plurality of arc-shaped plates. A clamping block adapted to the clamping groove is penetrated inside each sleeve. The clamping block is clamped with the clamping groove to improve the firmness between the arc-shaped plate and the positioning rod.

[0009] In a preferred embodiment, a pull rod is fixedly provided at one end of each clamping block. The end of the pull rod away from the clamping block penetrates through the outer wall of the sleeve. A return spring is sleeved on each pull rod. The two ends of the return spring are respectively fixed to the inner wall of the sleeve and the inner wall of the clamping block. The return spring is used to drive the clamping block to move to improve the firmness between the clamping block and the clamping groove.

[0010] In a preferred embodiment, a storage groove is provided on the outer wall of each arc-shaped plate. The end of the pull rod away from the clamping block extends into the storage groove. A round plate is fixedly provided at one end of each pull rod. The round plate is arranged in the storage groove, which is convenient for the staff to pull the pull rod to move, thereby adjusting the position of the clamping block and facilitating the staff to disassemble the arc-shaped plate and the positioning rod.

[0011] In a preferred embodiment, a circular groove is provided on the outer wall of each arc-shaped plate. A dial rod is fixedly provided inside each circular groove, which is convenient for the staff to flip the arc-shaped plate and install two lithium manganese batteries together for use, thereby improving the firmness between multiple lithium manganese batteries.

[0012] In a preferred embodiment, a plurality of mounting holes are formed on the outer wall surface of the reinforcing sleeve, and heat dissipation fins are fixedly penetrated through each mounting hole. One end of the heat dissipation fin is in contact with the cylindrical battery cell. The plurality of first grooves and the plurality of second grooves are staggered with the plurality of mounting holes, and the heat dissipation fins can be used to improve the heat dissipation effect of the cylindrical battery cell.

[0013] In a preferred embodiment, a detachable hollow tube is sleeved on the outer wall of the reinforcing sleeve. A sealing cover is provided at the top end of the hollow tube. A plurality of rubber clamping rods are fixedly provided at the bottom end of the sealing cover. A plurality of clamping holes are formed at the top end of the reinforcing sleeve, and the plurality of rubber clamping rods are respectively inserted into the plurality of clamping holes, which is convenient for installing and disassembling the circular plate.

[0014] In a preferred embodiment, a polymer switch is fixedly provided at the bottom end of the positive electrode cap, and the bottom end of the polymer switch is fixedly welded to the top end of the positive electrode current collector. When a current exceeding the set value passes through, the polymer switch can rapidly expand to cut off the current, thereby playing a role in protecting the lithium manganese battery.

[0015] In a preferred embodiment, the positive electrode plate is made of manganese dioxide, and the negative electrode plate is made of metallic lithium. Manganese dioxide is used as the positive electrode plate, which has the advantages of good electrical conductivity, environmental protection fuel consumption, and high safety. The negative electrode plate made of metallic lithium has the advantages of high specific capacity, low potential, and good electrical conductivity. Therefore, the lithium manganese battery has high safety and good electrical conductivity.

[0016] The technical effects and advantages of the present utility model: The present utility model plays a role in power-off protection through the polymer switch, and further plays a role in reinforcement and flame retardancy by using the reinforcing sleeve and the flame retardant in the flame retardant cavity, so as to improve the safety of the lithium manganese battery and avoid the high-temperature explosion of the lithium manganese battery itself and the influence on the conduction efficiency.

[0017] By turning over a plurality of arc-shaped plates to support the lithium manganese battery, the lithium manganese battery can be stably placed, avoiding the explosion caused by the rolling and falling of the lithium manganese battery, and further improving the safety of the lithium manganese battery.

[0018] The arc-shaped plate is inserted into the second groove, and at the same time, the return spring is used to push the block to be inserted into the card slot, so as to firmly fix the arc-shaped plate and the positioning rod together, keep the adjacent two lithium manganese batteries separated, and further facilitate air circulation, avoiding the influence on heat dissipation caused by the adhesion of the lithium manganese batteries. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the present utility model.

[0020] Figure 2 It is a sectional view of the overall structure of the present utility model.

[0021] Figure 3Cross-sectional view of the reinforcement sleeve of the present utility model.

[0022] Figure 4 Schematic diagram of the connection between two adjacent reinforcement sleeves of the present utility model.

[0023] Figure 5 Schematic diagram of the insertion of the arc-shaped plate and the positioning rod of the present utility model.

[0024] Figure 6 For the present utility model Figure 5 Enlarged view of part A in

[0025] Figure 7 Cross-sectional view of the arc-shaped plate of the present utility model.

[0026] Figure 8 Cross-sectional view of the sleeve of the present utility model.

[0027] Figure 9 Structural diagram of the sealing cover and the hollow tube of the present utility model.

[0028] Reference numerals are: 1, cylindrical shell; 2, cylindrical battery cell; 3, positive electrode cap; 4, positive electrode current collector; 5, negative electrode current collector; 6, reinforcement sleeve; 7, flame retardant cavity; 8, flame retardant; 9, groove 1; 10, groove 2; 11, positioning rod; 12, arc-shaped plate; 13, positioning hole; 14, clamping assembly; 15, clamping groove; 16, storage groove; 17, round plate; 18, circular groove; 19, lever; 20, mounting hole; 21, heat dissipation fins; 22, hollow tube; 23, sealing cover; 24, rubber clamping rod; 25, clamping hole; 26, polymer switch; positive electrode plate; 202, negative electrode plate; 203, separator; 1401, sleeve; 1402, clamping block; 1403, pull rod; 1404, return spring. Detailed implementation manners

[0029] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0030] Refer to the instruction manual appendix Figures 1-9, the present utility model provides a lithium manganese cylindrical soft-packaged battery structure, including a cylindrical shell 1. Inside the cylindrical shell 1, there is a cylindrical battery cell 2. The cylindrical battery cell 2 includes a positive electrode plate 201 and a negative electrode plate 202. The negative electrode plate 202 and the positive electrode plate 201 are separated by a separator 203 and wound together. There is an electrolyte between the cylindrical battery cell 2 and the cylindrical shell 1. The positive electrode plate 201 is made of manganese dioxide, and the negative electrode plate 202 is made of metallic lithium. Manganese dioxide used as the positive electrode plate has the advantages of good electrical conductivity, environmental protection and low fuel consumption, and high safety. The negative electrode plate made of metallic lithium has the advantages of high specific capacity, low potential and good electrical conductivity. Therefore, the lithium manganese battery has high safety and good electrical conductivity.

[0031] At the top end of the cylindrical shell 1, a positive electrode cap 3 is fixedly provided. At the bottom end of the positive electrode cap 3, a positive electrode current collector 4 is fixedly provided. The bottom end of the positive electrode current collector 4 extends into the cylindrical battery cell 2. On the inner wall of the bottom end of the cylindrical shell 1, a negative electrode current collector 5 is fixedly provided. The negative electrode current collector 5 is in contact with the negative electrode plate 202. At the bottom end of the positive electrode cap 3, a polymer switch 26 is fixedly provided. The bottom end of the polymer switch 26 is fixedly welded to the top end of the positive electrode current collector 4.

[0032] Moreover, a reinforcing sleeve 6 is fixedly sleeved on the outer wall of the cylindrical shell 1. Inside the reinforcing sleeve 6, there are a plurality of flame-retardant cavities 7. Each flame-retardant cavity 7 is filled with a flame retardant 8. Specifically, the flame retardant 8 is a chemical additive used to improve the fire resistance of materials. Its function is to delay or prevent the combustion process of materials when they come into contact with flames or high temperatures, thereby increasing the safety of materials and reducing the fire risk. In actual use, halogen flame retardants, inorganic flame retardants, and intumescent flame retardants can be selected according to requirements. On the outer wall surface of the reinforcing sleeve 6, a plurality of mounting holes 20 are opened. Each mounting hole 20 is fixedly penetrated by a heat dissipation fin 21. One end of the heat dissipation fin 21 is in contact with the cylindrical battery cell 2. A plurality of grooves one 9 and a plurality of grooves two 10 are staggered with the plurality of mounting holes 20. The heat dissipation effect of the cylindrical battery cell 2 can be improved by using the heat dissipation fins 21.

[0033] The cylindrical battery cell 2 is formed by winding the positive electrode plate 201, the negative electrode plate 202, and the separator 203 together. An electrolyte is injected between the cylindrical battery cell 2, the positive electrode cap 3, and the cylindrical shell 1. At the same time, a polymer switch 26 is arranged inside the positive electrode cap 3. The polymer switch 26 is prepared by mixing polypropylene plastic and additives, and then through hot pressing, electron beam irradiation cross-linking, and cutting. Therefore, the polymer switch 26 can expand freely and can quickly expand and cut off the current when the set current is exceeded, so as to play a role in protecting the lithium manganese battery. And a reinforcing sleeve 6 is sleeved on the outer wall of the cylindrical shell 1. The flame retardant 8 in the plurality of flame-retardant cavities 7 can further play a flame-retardant role.

[0034] Meanwhile, a plurality of heat dissipation fins 21 are arranged on the reinforcement sleeve 6, and the plurality of heat dissipation fins 21 are all in contact with the cylindrical battery cell 2, so as to improve the heat dissipation effect of the cylindrical battery cell 2 and avoid the lithium manganese battery from exploding due to its own high temperature and affecting the conduction efficiency.

[0035] Refer to the attached drawings of the specification Figure 1 、 4 -8, a plurality of first grooves 9 and a plurality of second grooves 10 are formed on the outer wall surface of the reinforcement sleeve 6. A positioning rod 11 is fixedly arranged on the inner wall of the bottom end of each second groove 10. An arc-shaped plate 12 is hinged inside each first groove 9. A positioning hole 13 is formed in the arc-shaped plate 12, and the positioning rod 11 is inserted into the positioning hole 13. A clamping groove 15 is formed on each positioning rod 11.

[0036] Next, a clamping component 14 for fixing the positioning rod 11 is arranged on the arc-shaped plate 12. The clamping component 14 includes a sleeve 1401. A plurality of sleeves 1401 are respectively fixedly penetrated through a plurality of arc-shaped plates 12. A clamping block 1402 adapted to the clamping groove 15 is penetrated through the inside of each sleeve 1401. The clamping block 1402 is clamped with the clamping groove 15, so as to improve the firmness between the arc-shaped plate 12 and the positioning rod 11.

[0037] Moreover, a pull rod 1403 is fixedly arranged at one end of each clamping block 1402. The end of the pull rod 1403 far from the clamping block 1402 penetrates through the outer wall of the sleeve 1401. A return spring 1404 is sleeved on each pull rod 1403. Two ends of the return spring 1404 are respectively fixed to the inner wall of the sleeve 1401 and the inner wall of the clamping block 1402. The return spring 1404 is used to drive the clamping block 1402 to move, so as to improve the firmness between the clamping block 1402 and the clamping groove 15. A storage groove 16 is formed on the outer wall of each arc-shaped plate 12. The end of the pull rod 1403 far from the clamping block 1402 extends into the storage groove 16. A round plate 17 is fixedly arranged at one end of each pull rod 1403. The round plate 17 is arranged in the storage groove 16, which is convenient for the staff to pull the pull rod 1403 to move, so as to adjust the position of the clamping block 1402 and facilitate the staff to disassemble the arc-shaped plate 12 and the positioning rod 11.

[0038] A circular groove 18 is formed on the outer wall of each arc-shaped plate 12. A dial rod 19 is fixedly arranged inside each circular groove 18, which is convenient for the staff to flip the arc-shaped plate 12 and connect two adjacent lithium manganese batteries together with the arc-shaped plate 12, so as to improve the firmness between a plurality of lithium manganese batteries.

[0039] By arranging a plurality of arc-shaped plates 12 on the outer wall of the reinforcement sleeve 6, when the lithium manganese battery is placed flat, the plurality of arc-shaped plates 12 can be flipped open to support the lithium manganese battery, thereby avoiding damage to the lithium manganese battery caused by rolling and falling, and at the same time avoiding explosion caused by the fall of the lithium manganese battery, thus improving the safety of the lithium manganese battery. And when using a plurality of lithium manganese batteries, the installer can flip open the arc-shaped plates 12, and at the same time align the arc-shaped plates 12 with the grooves two 10 on the adjacent reinforcement sleeve 6 and insert them. The positioning rod 11 is inserted into the positioning hole 13, and then the clamping block 1402 is automatically inserted into the clamping groove 15 driven by the return spring 1404, thereby firmly fixing the arc-shaped plate 12 and the positioning rod 11 together. By means of the arc-shaped plate 12, the gap between two adjacent lithium manganese batteries can be maintained, and the heat dissipation speed is prevented from being affected by the adhesion of the lithium manganese batteries.

[0040] Refer to the attached drawings of the specification Figure 1 and 9 , a detachable hollow tube 22 is sleeved on the outer wall of the reinforcement sleeve 6. A circular plate 17 is provided at the top of the hollow tube 22. A plurality of rubber clamping rods 24 are fixedly provided at the bottom of the circular plate 17. A plurality of clamping holes 25 are formed at the top of the reinforcement sleeve 6. The plurality of rubber clamping rods 24 are respectively inserted into the plurality of clamping holes 25, which is convenient for installing and disassembling the circular plate 17.

[0041] By arranging the hollow tube 22 and the circular plate 17, a protection effect is achieved on the positive electrode cap 3, thereby improving the safety of the lithium manganese battery during transportation. At the same time, when using the lithium manganese battery, the hollow tube 22 and the circular plate 17 can be installed at the bottom of the reinforcement sleeve 6 to play a role in supporting and strengthening.

[0042] Finally: The above are only the preferred embodiments of the present invention and are not used to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A lithium manganese cylindrical soft package battery structure, characterized in that: The invention comprises a cylindrical shell (1), wherein a cylindrical battery cell (2) is arranged inside the cylindrical shell (1), wherein the cylindrical battery cell (2) comprises a positive electrode sheet (201) and a negative electrode sheet (202), wherein the negative electrode sheet (202) and the positive electrode sheet (201) are separated by a separator (203) and are wound together, and an electrolyte is arranged between the cylindrical battery cell (2) and the cylindrical shell (1); a positive electrode cap (3) is fixedly arranged at the top end of the cylindrical shell (1), a positive electrode current collector (4) is fixedly arranged at the bottom end of the positive electrode cap (3), the bottom end of the positive electrode current collector (4) extends into the cylindrical battery cell (2), a negative electrode current collector (5) is fixedly arranged on the inner wall of the bottom end of the cylindrical shell (1), and the negative electrode current collector (5) is fixedly arranged on the inner wall of the bottom end of the cylindrical shell (1). The cylindrical shell (1) is provided with a reinforcing sleeve (6) fixedly sleeved on its outer wall, a plurality of flame retardant cavities (7) being provided in the reinforcing sleeve (6), each of which is filled with a flame retardant (8), a plurality of grooves 1 (9) and a plurality of grooves 2 (10) being provided on the outer wall surface of the reinforcing sleeve (6), a positioning rod (11) being fixedly provided on the inner wall of the bottom end of each groove 2 (10), an arc plate (12) being hingedly connected inside each groove 1 (9), a positioning hole (13) being provided on the arc plate (12), the positioning rod (11) being inserted into the positioning hole (13), and a clamping assembly (14) for fixing the positioning rod (11) being provided on the arc plate (12).

2. A lithium manganese cylindrical soft package battery structure according to claim 1, characterized in that: Each positioning rod (11) is provided with a slot (15), and the snap-fit ​​assembly (14) comprises a sleeve (1401). The plurality of sleeves (1401) are respectively fixed and penetrated through the plurality of arc-shaped plates (12), and each sleeve (1401) is penetrated by a clamping block (1402) adapted to the slot (15).

3. A lithium manganese cylindrical soft package battery structure according to claim 2, characterized in that: A pull rod (1403) is fixedly provided at one end of each clamping block (1402), and the end of the pull rod (1403) away from the clamping block (1402) passes through the outer wall of the sleeve (1401). A return spring (1404) is sleeved on each pull rod (1403), and the two ends of the return spring (1404) are respectively fixed to the inner wall of the sleeve (1401) and the inner wall of the clamping block (1402).

4. A lithium manganese cylindrical soft package battery structure according to claim 3, characterized in that: The outer wall of each arc-shaped plate (12) is provided with a receiving groove (16), and one end of the pull rod (1403) away from the clamping block (1402) extends into the receiving groove (16). A circular plate (17) is fixedly provided at one end of each pull rod (1403), and the circular plate (17) is arranged in the receiving groove (16).

5. The lithium manganese cylindrical soft package battery structure according to claim 1, characterized in that: A circular groove (18) is formed on the outer wall of each arc-shaped plate (12), and a lever (19) is fixedly disposed inside each circular groove (18).

6. The lithium manganese cylindrical soft package battery structure according to claim 1, characterized in that: The outer wall surface of the reinforcement sleeve (6) is provided with a plurality of mounting holes (20), each mounting hole (20) having a heat dissipation fin (21) fixedly penetrated therein, one end of the heat dissipation fin (21) being in contact with the cylindrical battery core (2), and the plurality of grooves one (9) and the plurality of grooves two (10) being staggeredly distributed with the plurality of mounting holes (20).

7. The lithium manganese cylindrical soft package battery structure according to claim 1, characterized in that: The outer wall of the reinforcement sleeve (6) is provided with a detachable hollow tube (22), the top end of the hollow tube (22) is provided with a sealing cover (23), the bottom end of the sealing cover (23) is fixed with a plurality of rubber clamping rods (24), the top end of the reinforcement sleeve (6) is provided with a plurality of clamping holes (25), and the plurality of rubber clamping rods (24) are respectively inserted into the plurality of clamping holes (25).

8. The lithium manganese cylindrical soft package battery structure according to claim 1, characterized in that: A polymer switch (26) is fixedly provided at the bottom end of the positive electrode cap (3), and the bottom end of the polymer switch (26) is fixedly welded to the top end of the positive electrode current collector (4).

9. The lithium manganese cylindrical soft package battery structure according to claim 1, characterized in that: The positive electrode sheet (201) is made of manganese dioxide, and the negative electrode sheet (202) is made of metallic lithium.

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