Battery

Abstract

The present invention belongs to the technical field of batteries, and discloses a battery, which includes a shell, a winding core, a cover plate assembly, and a first explosion-proof valve. The winding core is arranged inside the shell; the cover plate assembly is installed on the top of the shell, and the cover plate assembly includes a pole and a sealing nail. The pole is provided with a liquid injection port connecting the outside of the battery with the inside of the shell, and the sealing nail is arranged corresponding to the liquid injection port, and the sealing nail is used to block the liquid injection port; the cover plate assembly is also provided with a pressure relief port connecting the outside of the battery with the inside of the shell, and the pressure relief port and the liquid injection port are staggered, and the first explosion-proof valve is used to block the pressure relief port. With the battery of the present invention, helium can be injected into the shell from the liquid injection port, shortening the subsequent helium inspection time.

Description

Technical Field

[0001] The present invention relates to the technical field of batteries, in particular to batteries. Background Art

[0002] Existing cylindrical batteries use a grooved sealing cover plate welded to the shell, which makes it impossible to fill the battery with helium. As a result, the subsequent helium inspection (using helium to detect the sealing) takes too much time, such as using a specific instrument to infiltrate helium from the outside of the battery, and then conducting a helium inspection. The operation is cumbersome and not conducive to battery batch inspection. Summary of the invention

[0003] One object of the present invention is to provide a battery, which can inject helium into the interior of the shell from the liquid injection port to shorten the subsequent helium detection time.

[0004] To achieve this object, the present invention adopts the following technical solutions:

[0005] Batteries, including:

[0006] case;

[0007] A winding core is arranged inside the shell;

[0008] A cover plate assembly is mounted on the top of the shell, the cover plate assembly includes a pole and a sealing nail, the pole is provided with a liquid injection port connecting the outside of the battery and the inside of the shell, the sealing nail is arranged corresponding to the liquid injection port, and the sealing nail is used to block the liquid injection port;

[0009] The first explosion-proof valve, the cover plate assembly is also provided with a pressure relief port connecting the outside of the battery and the inside of the shell, the pressure relief port and the injection port are staggered, and the first explosion-proof valve is used to block the pressure relief port.

[0010] As an optional technical solution, a receiving groove is provided on the pole, the receiving groove is communicated with the liquid injection port, and the sealing nail is completely received in the receiving groove.

[0011] As an optional technical solution, the cover plate assembly further includes a sealing member, and the sealing member is sealed and filled in the receiving groove and / or the liquid injection port.

[0012] As an optional technical solution, the sealing member is located at the bottom of the sealing pin, the sealing pin abuts against the sealing member, and the sealing pin is fixed to the pole by welding.

[0013] As an optional technical solution, the side wall of the receiving groove is an inclined surface, and the bottom area of ​​the receiving groove is smaller than the notch area of ​​the receiving groove, and the peripheral surface of the sealing pin is adapted to the side wall of the receiving groove.

[0014] As an optional technical solution, the sealing member is made of soft material.

[0015] As an optional technical solution, the cover plate assembly also includes a top cover plate, which is fixedly arranged on the top port of the shell, a mounting hole is opened in the middle of the top cover plate, the pole is located in the mounting hole, and the pressure relief port is opened on the top cover plate.

[0016] As an optional technical solution, the cover plate assembly further includes a sealing ring, which is sealed between the outer wall of the pole and the inner wall of the mounting hole.

[0017] As an optional technical solution, the sealing ring includes an outer sealing ring and an inner sealing ring, the outer sealing ring and the inner sealing ring are separately arranged, the top cover plate and the shell form a loading cavity, the outer sealing ring is located outside the loading cavity, and the inner sealing ring is located in the loading cavity.

[0018] As an optional technical solution, an external limit piece is sleeved on the periphery of the pole, and the external limit piece is located between the top cover and the pole, one of the external limit piece and the top cover is provided with a first clamping block, and the other of the external limit piece and the top cover is provided with a first clamping groove, and the first clamping block is clamped in the first clamping groove to limit the rotation of the external limit piece around the centerline axis of the shell, and one of the external limit piece and the pole is provided with a second clamping block, and the other of the external limit piece and the pole is provided with a second clamping groove, and the second clamping block is clamped in the second clamping groove to limit the rotation of the pole around the centerline axis of the shell.

[0019] As an optional technical solution, a clamping ring groove is opened on the outer circumference of the pole, the inner ring portion of the top cover plate extends into the clamping ring groove, and the outer limit member is located in the clamping ring groove.

[0020] As an optional technical solution, a sink groove is provided at the top of the inner ring portion, and the bottom of the outer limiting member is accommodated in the sink groove.

[0021] As an optional technical solution, a sealing ring is provided on the outer periphery of the outer limiter at a side away from the top cover sheet, and the sealing ring is tightly attached to the outer wall of the top of the pole.

[0022] As an optional technical solution, the cover plate assembly also includes an inner limit member, which is located inside the shell, the upper end of the inner limit member tightly abuts against the top cover plate, and the lower end of the inner limit member abuts against the winding core.

[0023] As an optional technical solution, the inner limit member is further provided with a ventilation hole, and a positioning column is provided at the upper end of the inner limit member, and the positioning column is inserted into the positioning groove of the top cover plate so that the ventilation hole is opposite to the pressure relief port.

[0024] As an optional technical solution, the shell includes a bottom wall, and the bottom wall is configured as an arc-shaped concave structure, and the concave groove of the bottom wall is away from the winding core.

[0025] As an optional technical solution, a second explosion-proof valve is installed on the bottom wall.

[0026] As an optional technical solution, a bottom collecting plate is arranged between the winding core and the bottom wall, and the bottom collecting plate includes a first supporting area and a second supporting area, the convex surface of the first supporting area abuts against the bottom wall, the concave surface of the first supporting area faces the winding core, the convex surface of the second supporting area abuts against the winding core, and the concave surface of the second supporting area faces the bottom wall.

[0027] As an optional technical solution, the first supporting area includes a first central platform and a plurality of first annular platforms, the inner concave surface of the first central platform faces the center of the winding core, and the plurality of first annular platforms are radially spaced and surround the periphery of the first central platform;

[0028] The second supporting area includes a plurality of second annular platforms, which are alternately arranged with the first annular platforms in a radial direction, wherein an inner concave surface of at least one of the second annular platforms faces the second explosion-proof valve.

[0029] As an optional technical solution, a first guide groove is provided between the first central platform and the adjacent second annular platform, and the first guide groove connects the inner concave cavity of the first central platform with the inner concave cavity of the second annular platform;

[0030] A second guide groove is provided between the second annular platform and the adjacent first annular platform, and the second guide groove connects the inner concave cavity of the second annular platform with the inner concave cavity of the first annular platform.

[0031] As an optional technical solution, the first annular platform is further provided with a first annular groove, and the first annular groove is connected to the second guide groove.

[0032] As an optional technical solution, the side of the bottom wall facing the bottom current collecting plate is a plane, the convex surface of the first supporting area is a plane, and the convex surface of the first supporting area is welded to the bottom wall;

[0033] And / or, a side of the winding core facing the bottom collecting plate is a plane, a convex surface of the second supporting area is a plane, and the convex surface of the second supporting area is welded to the winding core.

[0034] As an optional technical solution, a top current collecting plate is arranged between the cover plate assembly and the winding core, the middle part of the top current collecting plate is a second center platform, the convex surface of the second center platform is welded to the pole, the inner concave surface of the second center platform faces the center of the winding core, and the periphery of the top current collecting plate is welded to the winding core.

[0035] As an optional technical solution, a first through hole is opened in the center of the second center platform, and the first through hole is connected to the injection port. A second through hole is opened on the side wall of the second center platform, and the second through hole is connected to the pressure relief port.

[0036] As an optional technical solution, a top guide groove is also opened on the periphery of the top collecting plate, and the top guide groove includes a radial guide groove, a second annular groove and a third annular groove. The second annular groove and the third annular groove are spaced around the periphery of the center of the top collecting plate, one end of the radial guide groove is connected to the second annular groove, and the other end of the radial guide groove is connected to the third annular groove.

[0037] As an optional technical solution, the battery further includes a protection sheet, and the protection sheet is arranged to cover the top of the first explosion-proof valve.

[0038] The beneficial effects of the present invention are:

[0039] The present invention provides a battery, which includes a shell, a winding core, a cover plate assembly and a first explosion-proof valve. When assembling and producing the battery, an open formation process is used at the liquid injection port, and the gas generated by the battery formation can be discharged through the liquid injection port to reduce the pressure inside the shell; when performing a helium test, helium can be injected into the shell from the liquid injection port in advance to shorten the subsequent helium test time; when the battery is in operation, the gas generated by the winding core is discharged from the pressure relief port through the first explosion-proof valve to the outside of the battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] The present invention is further described in detail below based on the accompanying drawings and embodiments;

[0041] Figure 1 An exploded view of the structure of the battery described in the embodiment;

[0042] Figure 2 is a cross-sectional view of a battery according to an embodiment;

[0043] Figure 3 for Figure 2 A partial enlarged view of position A in the middle;

[0044] Figure 4 for Figure 2 A partial enlarged view of position B in the middle;

[0045] Figure 5 A cross-sectional view of the cover plate assembly (sealing pins and sealing members are not shown), the first explosion-proof valve, and the protective sheet according to the embodiment;

[0046] Figure 6 An exploded view of the cover plate assembly (sealing pins and sealing members are not shown), the first explosion-proof valve and the protection sheet according to the embodiment;

[0047] Figure 7 is a cross-sectional view of a pole, a sealing nail and a sealing member according to an embodiment;

[0048] Figure 8 It is a schematic structural diagram of the bottom current collecting plate described in the embodiment;

[0049] Fig. 9 It is a schematic diagram of the structure of the top collecting plate described in the embodiment.

[0050] In the figure:

[0051] 1. Shell; 11. Bottom wall; 111. Inner concave groove; 12. Loading inner cavity;

[0052] 2. Roll core;

[0053] 3. Cover plate assembly; 31. Pole; 311. Liquid injection port; 312. Accommodating groove; 313. Second clamping groove; 314. Clamping ring groove; 32. Sealing nail; 33. Sealing member; 34. Top cover; 341. Pressure relief port; 342. First clamping groove; 343. Inner ring; 344. Sink; 35. Outer sealing ring; 36. Inner sealing ring; 37. Outer stopper; 371. First clamping block; 372. Second clamping block; 373. Sealing ring; 38. Inner stopper; 381. Air vent; 382. Positioning column;

[0054] 4. The first explosion-proof valve;

[0055] 5. The second explosion-proof valve;

[0056] 6. Bottom collecting plate; 61. First central platform; 62. First annular platform; 63. Second annular platform; 64. First guide groove; 65. Second guide groove; 66. First annular groove;

[0057] 7. Top collecting plate; 71. Second center platform; 72. First through hole; 73. Second through hole; 74. I-shaped guide groove;

[0058] 8. Protective sheet. DETAILED DESCRIPTION

[0059] In order to make the technical problems solved by the present invention, the technical solutions adopted and the technical effects achieved clearer, the technical solutions of the embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings. 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 those skilled in the art without creative work are within the scope of protection of the present invention.

[0060] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0061] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0062] In the description herein, it should be understood that the terms "upper", "lower", "left", "right", etc., and the like, are based on the directions or positions shown in the drawings, and are only for the convenience of description and simplified operation, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0063] In the description of this specification, the description with reference to the terms "an embodiment", "example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example.

[0064] The technical solution of the present invention is further described below with reference to the accompanying drawings and through specific implementation methods.

[0065] like Figures 1 to 9 As shown, this embodiment provides a battery, which includes a shell 1, a winding core 2, a cover assembly 3 and a first explosion-proof valve 4; the winding core 2 is arranged inside the shell 1; the cover assembly 3 is installed on the top of the shell 1, and the cover assembly 3 includes a pole 31 and a sealing nail 32. The pole 31 is provided with a liquid injection port 311 connecting the outside of the battery with the inside of the shell 1, and the sealing nail 32 is arranged corresponding to the liquid injection port 311, and the sealing nail 32 is used to block the liquid injection port 311; the cover assembly 3 is also provided with a pressure relief port 341 connecting the outside of the battery with the inside of the shell 1, and the pressure relief port 341 and the liquid injection port 311 are staggered, and the first explosion-proof valve 4 is used to block the pressure relief port 341.

[0066] Specifically, the battery of this embodiment is a cylindrical battery. When assembling and producing the battery, an open formation process is used at the liquid injection port 311. The gas generated by the battery formation can be discharged through the liquid injection port 311 to reduce the pressure inside the shell 1; when performing helium inspection, helium can be injected into the shell 1 from the liquid injection port 311 in advance to shorten the subsequent helium inspection time; when the battery is working, the gas generated by the core 2 is discharged from the pressure relief port 341 through the first explosion-proof valve 4 to the outside of the battery.

[0067] Optionally, the first explosion-proof valve 4 is cross-shaped or arch-shaped.

[0068] Optionally, the material of the housing 1 is nickel-plated steel or aluminum alloy.

[0069] Optionally, a receiving groove 312 is provided on the pole 31 , and the receiving groove 312 is connected to the injection port 311 , and the sealing pin 32 is completely received in the receiving groove 312 , so as to prevent the sealing pin 32 from being radially impacted by external forces, thereby ensuring the installation stability of the sealing pin 32 in the receiving groove 312 .

[0070] Optionally, the cover assembly 3 further includes a seal 33, and the seal 33 is sealed and filled in the receiving groove 312 and / or the injection port 311. In some embodiments, the seal 33 is filled in the receiving groove 312 or the injection port 311. In this embodiment, the seal 33 is filled in the receiving groove 312 and the injection port 311 at the same time to improve the sealing performance, and prevent external impurities or water vapor from passing through the receiving groove 312 and the injection port 311 to enter the interior of the housing 1 during the use of the battery.

[0071] Optionally, the receiving groove 312 is located above the liquid injection port 311 to facilitate the installation of the sealing member 33 and the sealing pin 32 .

[0072] Optionally, the containing groove 312 is coaxially arranged with the liquid injection port 311 .

[0073] Optionally, the sealing member 33 is located at the bottom of the sealing pin 32, the sealing pin 32 abuts against the sealing member 33, and the sealing pin 32 is welded and fixed to the pole 31. When the battery generates gas, the internal gas pressure of the housing 1 is greater than the atmospheric pressure, and the sealing pin 32 abuts against the sealing member 33 to prevent the sealing member 33 from being separated from the receiving groove 312; the sealing pin 32 and the pole 31 are welded and fixed, which has strong stability and reduces the number of fastening parts.

[0074] Optionally, the side wall of the receiving groove 312 is an inclined surface, and the bottom area of ​​the receiving groove 312 is smaller than the notch area of ​​the receiving groove 312 , and the peripheral surface of the sealing pin 32 is adapted to the side wall of the receiving groove 312 .

[0075] In this embodiment, the sealing pin 32 is a truncated cone structure, and the receiving groove 312 is an inverted truncated cone groove structure. The sealing pin 32 is inverted in the receiving groove 312. The sealing pin 32 and the receiving groove 312 are sealed and adapted to facilitate welding. The sealing member 33 tightly seals the liquid injection port 311.

[0076] In some other embodiments, the sealing pin 32 is a prism structure, and the receiving groove 312 is an inverted prism groove structure.

[0077] Optionally, the sealing member 33 is made of a soft material to improve the sealing performance of the sealing member 33 in the receiving groove 312 and the liquid injection port 311. In this embodiment, the sealing member 33 is made of a soft colloid.

[0078] Optionally, the cover plate assembly 3 also includes a top cover plate 34 , which is fixedly disposed on the top port of the shell 1 , a mounting hole is opened in the middle of the top cover plate 34 , the pole 31 is located in the mounting hole, and a pressure relief port 341 is opened on the top cover plate 34 .

[0079] Specifically, the peripheral edge of the top cover sheet 34 is welded and fixed to the edge of the top port of the shell 1 to ensure the supporting strength. The outer wall of the top cover sheet 34 is flush with the outer wall of the shell 1, and the outer wall of the battery is smooth and flush.

[0080] Optionally, the cover plate assembly 3 further includes a sealing ring, which is sealed between the outer wall of the pole 31 and the inner wall of the mounting hole to improve the sealing performance between the pole 31 and the top cover plate 34 .

[0081] Optionally, the sealing ring includes an outer sealing ring 35 and an inner sealing ring 36, and the outer sealing ring 35 and the inner sealing ring 36 are separately arranged. The top cover plate 34 and the shell 1 form a loading cavity 12. The outer sealing ring 35 is located outside the loading cavity 12, and the inner sealing ring 36 is located in the loading cavity 12. During assembly production, the outer sealing ring 35 and the inner sealing ring 36 are installed independently, which is convenient for installation operation.

[0082] Optionally, an outer limit piece 37 is sleeved on the periphery of the pole 31, and the outer limit piece 37 is located between the top cover piece 34 and the pole 31. One of the outer limit piece 37 and the top cover piece 34 is provided with a first clamping block 371, and the other of the outer limit piece 37 and the top cover piece 34 is provided with a first clamping groove 342. The first clamping block 371 is clamped in the first clamping groove 342 to limit the rotation of the outer limit piece 37 around the centerline axis of the shell 1. One of the outer limit piece 37 and the pole 31 is provided with a second clamping block 372, and the other of the outer limit piece 37 and the pole 31 is provided with a second clamping groove 313. The second clamping block 372 is clamped in the second clamping groove 313 to limit the rotation of the pole 31 around the centerline axis of the shell 1.

[0083] Specifically, during the use of the battery, the pole 31 will inevitably be subjected to some torque. In order to prevent the pole 31 from loosening and rotating, the present embodiment is fixed to the shell 1 by welding the top cover 34, the first clamping block 371 is engaged with the first clamping groove 342, and the outer limit member 37 is fixedly engaged with the top cover 34, the second clamping block 372 is engaged with the second clamping groove 313, and the pole 31 is fixedly engaged with the outer limit member 37, thereby limiting the rotation of the pole 31 around the centerline axis of the shell 1, thereby improving the torsion resistance of the pole 31.

[0084] In this embodiment, the outer limit member 37 is provided with a first clamping block 371 , and the top cover 34 is provided with a first clamping slot 342 . In some other embodiments, the top cover 34 is provided with a first clamping block 371 , and the outer limit member 37 is provided with a first clamping slot 342 .

[0085] Specifically, four first clamping blocks 371 are disposed around the top of the outer limiting member 37 , and four first clamping grooves 342 are correspondingly disposed on the top cover plate 34 . The first clamping blocks 371 correspond to the first clamping grooves 342 one by one.

[0086] In this embodiment, the outer limit member 37 is provided with a second clamping block 372 , and the pole 31 is provided with a second clamping slot 313 . In some other embodiments, the pole 31 is provided with a second clamping block 372 , and the outer limit member 37 is provided with a second clamping slot 313 .

[0087] Specifically, four second clamping blocks 372 are disposed around the bottom of the outer limiting member 37 , and four second clamping grooves 313 are correspondingly disposed on the pole 31 , and the second clamping blocks 372 correspond to the second clamping grooves 313 one by one.

[0088] Optionally, a clamping ring groove 314 is formed on the outer circumference of the pole 31 , the inner ring portion 343 of the top cover plate 34 extends into the clamping ring groove 314 , and the outer limit member 37 is located in the clamping ring groove 314 .

[0089] Specifically, the first clamping block 371 is clamped with the first clamping groove 342 at the top of the clamping ring groove 314, and the outer limit member 37 is arranged in the clamping ring groove 314 to reduce the thickness of the cover plate assembly 3 to improve the axial space utilization.

[0090] Optionally, a recessed groove 344 is formed at the top of the inner ring portion 343 , and the bottom of the outer limiting member 37 is accommodated in the recessed groove 344 , thereby reducing the thickness of the cover plate assembly 3 and improving the utilization of the axial space.

[0091] Optionally, a sealing ring 373 is provided on the outer periphery of the outer limiter 37 away from the top cover sheet 34 , and the sealing ring 373 is tightly attached to the outer wall of the top of the pole 31 to improve the sealing performance between the outer limiter 37 and the pole 31 .

[0092] Optionally, the outer limiting member 37 is made of plastic material to reduce weight.

[0093] Optionally, the cover assembly 3 also includes an inner limit member 38, which is located inside the shell 1, with the upper end of the inner limit member 38 tightly abutting against the top cover sheet 34, and the lower end of the inner limit member 38 abutting against the winding core 2, and the inner limit member 38 can support the top cover sheet 34.

[0094] Optionally, the inner limit member 38 is also provided with a vent hole 381, and a positioning column 382 is provided at the upper end of the inner limit member 38. The positioning column 382 is inserted into the positioning groove of the top cover 34 so that the vent hole 381 is opposite to the pressure relief port 341. During the process of assembling and producing the battery, the pressure relief port 341 and the vent hole 381 are prevented from being misaligned, so that the gas cannot enter the pressure relief port 341 from the vent hole 381 when the battery is running.

[0095] Optionally, the housing 1 includes a bottom wall 11, and the bottom wall 11 is configured as an arc-shaped concave structure, and the concave groove 111 of the bottom wall 11 faces away from the winding core 2. The bottom wall 11 is configured as an arc-shaped concave structure, which can improve the supporting strength.

[0096] Optionally, a second explosion-proof valve 5 is installed on the bottom wall 11. Explosion-proof valves are arranged on the upper and lower parts of the battery to achieve a double-layer protection effect, prevent the battery from catching fire or exploding, and ensure the safety of the battery.

[0097] Optionally, a bottom collecting plate 6 is arranged between the winding core 2 and the bottom wall 11, and the bottom collecting plate 6 includes a first supporting area and a second supporting area, the convex surface of the first supporting area abuts against the bottom wall 11, and the concave surface of the first supporting area faces the winding core 2, the convex surface of the second supporting area abuts against the winding core 2, and the concave surface of the second supporting area faces the bottom wall 11.

[0098] Specifically, the first support area and the second support area are both stamped from the bottom collecting plate 6, so that a convex surface and a concave surface are formed on the bottom collecting plate 6, and the cavity surrounded by the concave surface is an inner concave cavity. The bottom collecting plate 6 is arranged between the winding core 2 and the bottom wall 11, and the winding core 2 is effectively supported by the bottom collecting plate 6.

[0099] Optionally, the first supporting area includes a first central platform 61 and several first annular platforms 62, the inner concave surface of the first central platform 61 faces the center of the winding core 2, and the several first annular platforms 62 are radially spaced and surround the circumference of the first central platform 61; the second supporting area includes several second annular platforms 63, and the second annular platforms 63 and the first annular platforms 62 are radially alternately arranged, wherein the inner concave surface of at least one second annular platform 63 faces the second explosion-proof valve 5.

[0100] When electrolyte is injected into the center of the core 2 or gas is generated by the core 2, the inner concave surface of the first central platform 61 is facing the center of the core 2, which is conducive to the circulation of electrolyte and gas. The inner concave surface of the second annular platform 63 faces the second explosion-proof valve 5. The inner concave surface of the second annular platform 63 forms an inner concave cavity. When electrolyte and gas are stored in the inner concave cavity, it is conducive to the opening of the second explosion-proof valve 5 to release pressure.

[0101] In this embodiment, there is one first annular platform 62 and one second annular platform 63. In other embodiments, the specific number of the first annular platform 62 and the second annular platform 63 can be set according to actual needs, such as two, three, four, or even more.

[0102] Optionally, a first guide groove 64 is provided between the first central platform 61 and the adjacent second annular platform 63, and the first guide groove 64 connects the inner concave cavity of the first central platform 61 with the inner concave cavity of the second annular platform 63; a second guide groove 65 is provided between the second annular platform 63 and the adjacent first annular platform 62, and the second guide groove 65 connects the inner concave cavity of the second annular platform 63 with the inner concave cavity of the first annular platform 62.

[0103] The provision of the first guide groove 64 and the second guide groove 65 is beneficial to the circulation of the electrolyte and the gas, and is beneficial to the opening of the second explosion-proof valve 5 for pressure relief.

[0104] Optionally, the first guide groove 64 and the second guide groove 65 extend radially to improve the fluidity of the electrolyte and the gas.

[0105] Optionally, the first annular platform 62 is further provided with a first annular groove 66, and the first annular groove 66 is connected to the second guide groove 65. The first annular groove 66 is an annular groove, which improves the fluidity of the electrolyte and gas in the first annular platform 62.

[0106] Optionally, the side of the bottom wall 11 facing the bottom collecting plate 6 is a plane, the convex surface of the first supporting area is a plane, and the convex surface of the first supporting area is welded to the bottom wall 11, which improves welding convenience, expands the welding area, and improves support strength.

[0107] Optionally, the side of the winding core 2 facing the bottom collecting plate 6 is flat, the convex surface of the second supporting area is flat, and the convex surface of the second supporting area is welded to the winding core 2, which improves welding convenience, expands the welding area, and improves support strength.

[0108] Optionally, a top current collecting plate 7 is arranged between the cover plate assembly 3 and the winding core 2, the middle part of the top current collecting plate 7 is a second center platform 71, the convex surface of the second center platform 71 is welded to the pole 31, the inner concave surface of the second center platform 71 faces the center of the winding core 2, and the periphery of the top current collecting plate 7 is welded to the winding core 2.

[0109] Specifically, the middle part of the top current collecting plate 7 is raised to facilitate welding of the top current collecting plate 7 and the pole 31; the inner concave surface of the second center platform 71 can buffer electrolyte and gas; during the assembly process of the battery of this embodiment, the top current collecting plate 7 and the bottom current collecting plate 6 can be welded simultaneously, which shortens the manufacturing time and ensures the welding process.

[0110] Optionally, a first through hole 72 is provided in the center of the second center platform 71, and the first through hole 72 is connected to the liquid injection port 311. A second through hole 73 is provided in the side wall of the second center platform 71, and the second through hole 73 is connected to the pressure relief port 341. When the helium test is performed, helium can enter the interior of the housing 1 from the liquid injection port 311 through the first through hole 72. After the second center platform 71 is welded to the pole 31, the liquid injection port 311 is blocked by the seal 33 and the sealing nail 32, and the first through hole 72 is no longer connected to the outside world. Therefore, the second through hole 73 is provided in the side wall of the second center platform 71, which is conducive to the circulation of electrolyte and gas, and ensures that the gas can smoothly pass through the first explosion-proof valve 4 from the pressure relief port 341.

[0111] Optionally, a top guide groove 74 is also provided on the periphery of the top collecting plate 7, and the top guide groove 74 includes a radial guide groove, a second annular groove and a third annular groove. The second annular groove and the third annular groove are radially spaced and surround the periphery of the center of the top collecting plate 7. One end of the radial guide groove is connected to the second annular groove, and the other end of the radial guide groove is connected to the third annular groove.

[0112] Optionally, a plurality of top guide grooves 74 are provided, and the plurality of top guide grooves 74 are equidistantly spaced around the center of the top collecting plate 7, the second annular groove of each top guide groove 74 is located on a circle of the same diameter, and the third annular groove of each top guide groove 74 is located on a circle of the same diameter.

[0113] In addition, the above are only preferred embodiments of the present invention and the technical principles used. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and that various obvious changes, readjustments and substitutions can be made by those skilled in the art without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in more detail through the above embodiments, the present invention is not limited to the above embodiments, and may include more other equivalent embodiments without departing from the concept of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. A battery, characterized in that include: Housing (1); A winding core (2) is arranged inside the shell (1); A cover plate assembly (3) is mounted on the top of the shell (1), the cover plate assembly (3) comprising a pole (31) and a sealing nail (32), the pole (31) being provided with a liquid injection port (311) for connecting the outside of the battery with the inside of the shell (1), the sealing nail (32) being arranged corresponding to the liquid injection port (311), and the sealing nail (32) being used to block the liquid injection port (311); when assembling and producing the battery, an open formation process is used at the liquid injection port (311), and the gas generated by the battery formation is discharged through the liquid injection port (311), thereby reducing the pressure inside the shell (1); when performing a helium inspection, helium is injected into the shell (1) from the liquid injection port (311) in advance, thereby shortening the subsequent helium inspection time; a first explosion-proof valve (4); the cover plate assembly (3) is further provided with a pressure relief port (341) communicating the outside of the battery with the inside of the housing (1); the pressure relief port (341) and the liquid injection port (311) are arranged in a staggered manner; and the first explosion-proof valve (4) is used to block the pressure relief port (341); A top current collecting plate (7) is arranged between the cover plate assembly (3) and the winding core (2); the middle part of the top current collecting plate (7) is a second center platform (71); the convex surface of the second center platform (71) is welded to the pole (31); the inner concave surface of the second center platform (71) faces the center of the winding core (2); and the periphery of the top current collecting plate (7) is welded to the winding core (2); A first through hole (72) is provided at the center of the second center platform (71), and the first through hole (72) is connected to the liquid injection port (311). A second through hole (73) is provided on the side wall of the second center platform (71), and the second through hole (73) is connected to the pressure relief port (341).

2. The battery according to claim 1, characterized in that The pole (31) is provided with a receiving groove (312), the receiving groove (312) is communicated with the liquid injection port (311), and the sealing nail (32) is completely received in the receiving groove (312).

3. The battery according to claim 2, characterized in that The cover plate assembly (3) further comprises a sealing member (33), wherein the sealing member (33) is sealed and filled in the containing groove (312) and / or the liquid injection port (311).

4. The battery according to claim 3, characterized in that The sealing member (33) is located at the bottom of the sealing pin (32), the sealing pin (32) abuts against the sealing member (33), and the sealing pin (32) is fixed to the pole (31) by welding.

5. The battery according to claim 3 or 4, characterized in that: The side wall of the receiving groove (312) is an inclined surface, and the bottom area of ​​the receiving groove (312) is smaller than the notch area of ​​the receiving groove (312), and the peripheral surface of the sealing pin (32) is adapted to the side wall of the receiving groove (312).

6. The battery according to claim 3, characterized in that The sealing member (33) is made of soft material.

7. The battery according to claim 1, characterized in that The cover plate assembly (3) further comprises a top cover plate (34), wherein the top cover plate (34) is fixedly arranged at the top port of the shell (1), a mounting hole is provided in the middle of the top cover plate (34), the pole (31) is located in the mounting hole, and the pressure relief port (341) is provided on the top cover plate (34).

8. The battery according to claim 7, characterized in that The cover plate assembly (3) also includes a sealing ring, which is sealed between the outer wall of the pole (31) and the inner wall of the mounting hole.

9. The battery according to claim 8, characterized in that The sealing ring comprises an outer sealing ring (35) and an inner sealing ring (36); the outer sealing ring (35) and the inner sealing ring (36) are separately arranged; the top cover sheet (34) and the shell (1) enclose a loading cavity (12); the outer sealing ring (35) is located outside the loading cavity (12), and the inner sealing ring (36) is located inside the loading cavity (12).

10. The battery according to claim 7, characterized in that An outer limiting member (37) is sleeved on the periphery of the pole (31), and the outer limiting member (37) is located between the top cover (34) and the pole (31). One of the outer limiting member (37) and the top cover (34) is provided with a first clamping block (371), and the other of the outer limiting member (37) and the top cover (34) is provided with a first clamping groove (342). The first clamping block (371) is clamped in the first clamping groove (342). 2) to limit the outer limit member (37) from rotating around the center axis of the housing (1), one of the outer limit member (37) and the pole (31) is provided with a second clamping block (372), the other of the outer limit member (37) and the pole (31) is provided with a second clamping groove (313), the second clamping block (372) is clamped in the second clamping groove (313) to limit the pole (31) from rotating around the center axis of the housing (1).

11. The battery according to claim 10, characterized in that A clamping ring groove (314) is provided on the outer circumference of the pole (31), the inner ring portion (343) of the top cover plate (34) extends into the clamping ring groove (314), and the outer limiting member (37) is located in the clamping ring groove (314).

12. The battery according to claim 11, characterized in that A sink groove (344) is provided at the top of the inner ring portion (343), and the bottom of the outer limiting member (37) is accommodated in the sink groove (344).

13. The battery according to claim 11, characterized in that A sealing ring (373) is provided along the outer periphery of the outer limiting member (37) on a side away from the top cover sheet (34), and the sealing ring (373) is tightly attached to the outer wall of the top of the pole (31).

14. The battery according to claim 7, characterized in that The cover plate assembly (3) also includes an inner limit member (38), which is located inside the shell (1), the upper end of the inner limit member (38) tightly abuts against the top cover plate (34), and the lower end of the inner limit member (38) abuts against the winding core (2).

15. The battery according to claim 14, characterized in that The inner limit member (38) is also provided with a vent hole (381), and a positioning column (382) is provided at the upper end of the inner limit member (38), and the positioning column (382) is inserted into the positioning groove of the top cover sheet (34) so ​​that the vent hole (381) is directly opposite to the pressure relief port (341).

16. The battery according to claim 1, characterized in that The shell (1) comprises a bottom wall (11), the bottom wall (11) being arranged as a circular arc concave structure, and the concave groove (111) of the bottom wall (11) faces away from the winding core (2).

17. The battery according to claim 16, characterized in that A second explosion-proof valve (5) is installed on the bottom wall (11).

18. The battery according to claim 1, characterized in that The top collecting plate (7) is also provided with a top guide groove (74) on its periphery, and the top guide groove (74) comprises a radial guide groove, a second annular groove and a third annular groove, wherein the second annular groove and the third annular groove are spaced around the periphery of the center of the top collecting plate (7), one end of the radial guide groove is connected to the second annular groove, and the other end of the radial guide groove is connected to the third annular groove.

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