Negative pressure formation device and battery production equipment

Abstract

The utility model discloses a negative pressure formation device and battery production equipment. The negative pressure formation device comprises a tray assembly and a negative pressure assembly, and the tray assembly is used for placing battery monomers; the negative pressure assembly comprises a support, a connecting piece, a negative pressure piece and a first elastic piece, the connecting piece is installed on the support, the negative pressure piece penetrates through the connecting piece and can slide relative to the connecting piece, one end of the first elastic piece is fixed to the connecting piece, the other end of the first elastic piece is fixed to the end of the negative pressure piece, and the end of the negative pressure piece is used for being aligned with a liquid injection hole of the battery single body for vacuumizing. According to the invention, the sealing effect of vacuumizing can be improved, the humidity and the like of the external environment do not need to be controlled, and the production cost of the battery is reduced.

Description

Technical Field

[0001] The present application relates to the technical field of batteries, and in particular, to a negative pressure formation device and a battery production equipment. Background Art

[0002] Battery cells are widely used in electronic devices, such as mobile phones, laptop computers, battery cars, electric vehicles, electric airplanes, electric ships, electric toy cars, electric toy ships, electric toy airplanes, and electric tools, etc. Battery cells can include nickel-cadmium battery cells, nickel-metal hydride battery cells, lithium-ion battery cells, and secondary alkaline zinc-manganese battery cells, etc.

[0003] In the development of battery technology, how to reduce the production cost of batteries is a research direction in battery technology. Summary of the Invention

[0004] Embodiments of the present application provide a negative pressure formation device and a battery production equipment, which can reduce the production cost of batteries.

[0005] In a first aspect, embodiments of the present application provide a negative pressure formation device. The negative pressure formation device includes a tray assembly and a negative pressure assembly. The tray assembly is used for placing battery cells; the negative pressure assembly includes a bracket, a connecting member, a negative pressure member, and a first elastic member. The connecting member is installed on the bracket. The negative pressure member passes through the connecting member and can slide relative to the connecting member. One end of the first elastic member is fixed to the connecting member, and the other end is fixed to the end of the negative pressure member. The end of the negative pressure member is used to align with the liquid injection hole of the battery cell to evacuate.

[0006] In the above solution, by aligning the negative pressure member with the liquid injection hole of the battery cell to seal the liquid injection hole, the inside of the battery cell can be evacuated. Moreover, when the end of the negative pressure member has already contacted the edge of the liquid injection hole, when the bracket continues to drive the connecting member to move downward, the first elastic member will be compressed, so that the end of the negative pressure member contacts the edge of the liquid injection hole more tightly, improving the sealing effect of evacuation, without the need to control the humidity of the external environment, etc., reducing the production cost of the battery.

[0007] In some embodiments, the negative pressure member includes a negative pressure rod and a suction nozzle. The negative pressure rod passes through the connecting member and can slide relative to the connecting member. The inside of the negative pressure rod is a hollow structure; the suction nozzle is detachably arranged at the end of the negative pressure rod. The suction nozzle is used to align with the liquid injection hole of the battery cell to evacuate; wherein, the other end of the first elastic member is fixed to the negative pressure rod or fixed to the suction nozzle.

[0008] In the above solution, the detachable cooperation of the negative pressure rod and the suction nozzle allows for separate replacement when the suction nozzle or the negative pressure rod is damaged, further reducing the production cost of the battery.

[0009] In some embodiments, a groove is provided at one end of the suction nozzle facing the negative pressure rod; the end of the negative pressure rod is inserted into the groove and is in a tight fit with the groove. The negative pressure rod is provided with a protruding portion, and the protruding portion abuts against the edge of the groove. The other end of the first elastic member is fixed to the protruding portion.

[0010] In the above solution, through the tight fit between the negative pressure rod and the groove and the abutment between the protruding portion and the edge of the groove, the disassembly and assembly of the negative pressure rod and the suction nozzle can be facilitated, the production and replacement efficiency can be improved, and the production cost of the battery can be further reduced.

[0011] In some embodiments, the negative pressure assembly further includes a positioning member and a second elastic member. The positioning member is disposed on the negative pressure member; one end of the second elastic member is fixed to the positioning member, and the other end is fixed to the connecting member.

[0012] In the above solution, by connecting the positioning member and the connecting member through the second elastic member respectively, the connecting member can be more stably connected to the negative pressure member, and the connecting member can be better reset.

[0013] In some embodiments, the tray assembly includes a tray and a first locking member. The tray is used for placing battery cells; the first locking member is disposed on the tray, and a second locking member is disposed on the bracket. The second locking member is used for self-locking or unlocking with the first locking member.

[0014] In the above solution, through the mutual self-locking of the first locking member of the tray assembly and the second locking member of the negative pressure assembly, the negative pressure member can more accurately evacuate the inside of the battery cell, improving the stability during evacuation. By unlocking the first locking member of the tray assembly and the second locking member of the negative pressure assembly from each other, it is convenient for the negative pressure assembly to disengage from the tray assembly, thereby improving the production efficiency of the battery.

[0015] In some embodiments, the first locking member includes a column portion and an abutting portion disposed on the outer periphery of the column portion. The column portion is disposed on the tray; the second locking member includes a sleeve and a hook portion. The sleeve is disposed on the bracket. The sleeve is provided with a through hole for the column portion to pass through along a first direction. The hook portion is movably connected to the sleeve along a second direction. The first direction and the second direction are intersecting; the abutting portion is used for abutting against the hook portion.

[0016] In the above solution, the column portion can pass through the through hole of the sleeve, and the abutting portion pushes the hook portion outwards, so that the abutting portion can pass through the through hole of the sleeve, and then the hook portion moves inwards. The hook portion abuts against the lower side of the abutting portion, realizing the mutual locking between the first locking member and the second locking member. The structure is simple and the self-locking is fast and convenient, which can further improve the production efficiency of the battery.

[0017] In some embodiments, the first locking member further includes an unlocking portion. The unlocking portion is slidably sleeved on the outer periphery of the column portion, and the outer edge of the unlocking portion is used for abutting against the inner wall of the sleeve.

[0018] In the above solution, by continuously moving the bracket downward, the unlocking portion contacts the hook portion and pushes the hook portion outward. When the bracket is lifted, the hook portion drives the unlocking portion to move upward. The unlocking portion is blocked by the abutting portion, and the hook portion smoothly disengages from the abutting portion, realizing the mutual unlocking of the second locking member and the first locking member. The structure is simple and easy to operate, which can further improve the production efficiency of the battery.

[0019] In some embodiments, the side surface of the unlocking portion is a first inclined surface, and in the direction from the sleeve to the unlocking portion, the first inclined surface inclines towards the column portion.

[0020] In the above solution, the first inclined surface is more conducive to the abutment of the hook portion and the unlocking portion, and can lift the unlocking portion upward more smoothly, so that the first locking member and the second locking member can be quickly unlocked.

[0021] In some embodiments, the first locking member further includes a third elastic member. One end of the third elastic member in the second direction is fixed to the hook portion, and the other end is fixed to the sleeve. The third elastic member can enable the hook portion to move in the second direction and smoothly reset.

[0022] In some embodiments, the side surface of the abutting portion is a second inclined surface, and in the direction from the sleeve to the column portion, the second inclined surface inclines outward.

[0023] In the above solution, the second inclined surface has a guiding effect, which can make the hook portion more easily pushed outward by the abutting portion, and the first locking member and the second locking member can be self-locked more quickly.

[0024] In some embodiments, the surface of the hook portion facing the inside of the sleeve is a third inclined surface, and in the direction from the sleeve to the unlocking portion, the third inclined surface inclines away from the column portion.

[0025] In the above solution, the third inclined surface can make it easier for the abutting portion to apply force to the hook portion, and abut more closely with the unlocking portion, and it is easier to lift the unlocking portion upward, thereby realizing the quick self-locking and unlocking between the first locking member and the second locking member.

[0026] In a second aspect, the embodiments of the present application further provide a battery production device, including the negative pressure forming device according to any one of the above embodiments.

[0027] The above description is only an overview of the technical solution of the present application. In order to be able to understand the technical means of the present application more clearly, it can be implemented according to the content of the specification. And in order to make the features and advantages of the present application more obvious and easy to understand, the following specifically illustrates the specific embodiments of the present application. Brief Description of the Drawings

[0028] To more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the accompanying drawings required for the embodiments of the present application. Obviously, the accompanying drawings described below are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other accompanying drawings can be obtained based on these drawings.

[0029] Figure 1 Structural schematic diagram of a negative pressure forming device for some embodiments of the present application;

[0030] Figure 2 Structural schematic diagram of a negative pressure forming device for some embodiments of the present application;

[0031] Figure 3 Partial structural schematic diagram of a negative pressure component for some embodiments of the present application;

[0032] Figure 4 For Figure 2 Enlarged schematic diagram of part A in

[0033] Figure 5 Structural schematic diagram of a first locking member for some embodiments of the present application;

[0034] Figure 6 Structural schematic diagram of a second locking member for some embodiments of the present application;

[0035] Figure 7 Cross-sectional schematic diagram of a second locking member for some embodiments of the present application.

[0036] Explanation of reference numerals:

[0037] 100, negative pressure forming device; 10, tray assembly; 11, tray; 12, first locking member; 121, column part; 122, abutting part; 123, unlocking part; 124, first inclined surface; 125, third elastic member; 126, second inclined surface; 20, negative pressure assembly; 21, bracket; 211, first mounting plate; 212, second mounting plate; 213, support member; 214, grasping block; 22, connecting member; 221, card seat; 222, pressing plate; 23, negative pressure member; 231, negative pressure rod; 232, suction nozzle; 233, groove; 234, protruding part; 24, first elastic member; 25, air pipe; 26, air hood; 27, manifold plate; 271, air pipe joint; 281, positioning member; 282, second elastic member; 29, second locking member; 291, sleeve; 292, hook part; 293, through hole; 294, third inclined surface; 200, battery cell; 210, liquid injection hole; X, first direction; Y, second direction. Detailed implementation manners

[0038] The following further describes the embodiments of the present application in conjunction with the accompanying drawings and examples. The detailed descriptions and drawings of the following examples are used to exemplarily illustrate the principles of the present application, but cannot be used to limit the scope of the present application, that is, the present application is not limited to the described embodiments.

[0039] In the description of the present application, it should be noted that unless otherwise specified, the meaning of "a plurality" is two or more; the orientation or positional relationships indicated by the terms "upper", "lower", "left", "right", "inner", "outer", etc. are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be construed as a limitation on the present application. In addition, the terms "first", "second", "third", etc. are only used for descriptive purposes and cannot be construed as indicating or implying relative importance. "Vertical" is not strictly vertical, but within the allowable error range. "Parallel" is not strictly parallel, but within the allowable error range.

[0040] Referring to "embodiments" in the present application means that specific features, structures or characteristics described in connection with the embodiments can be included in at least one embodiment of the present application. The phrase appearing in various positions in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described in the present application can be combined with other embodiments.

[0041] The orientation words appearing in the following description are all the directions shown in the figures and do not limit the specific structure of the present application. In the description of the present application, it should also be noted that unless otherwise clearly specified and limited, the terms "installed", "connected", "connected" 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 directly connected, or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0042] The battery cell may include a lithium-ion secondary battery, a lithium-ion primary battery, a lithium-sulfur battery, a sodium-lithium-ion battery, a sodium-ion battery, a magnesium-ion battery, etc. The battery cell includes an electrode assembly and an electrolyte. The electrode assembly is composed of a positive electrode sheet, a negative electrode sheet, and a separator. The battery cell mainly operates by the movement of metal ions between the positive electrode sheet and the negative electrode sheet. The positive electrode sheet includes a positive electrode current collector and a positive electrode active material layer. The positive electrode active material layer is coated on the surface of the positive electrode current collector. The current collector without the coated positive electrode active material layer protrudes from the current collector with the coated positive electrode active material layer. The stacked current collectors without the coated positive electrode active material layer serve as the positive electrode tab. Taking a lithium-ion battery as an example, the material of the positive electrode current collector can be aluminum, and the positive electrode active material can be lithium cobaltate, lithium iron phosphate, ternary lithium, lithium manganate, etc. The negative electrode sheet includes a negative electrode current collector and a negative electrode active material layer. The negative electrode active material layer is coated on the surface of the negative electrode current collector. The current collector without the coated negative electrode active material layer protrudes from the current collector with the coated negative electrode active material layer. The stacked current collectors without the coated negative electrode active material layer serve as the negative electrode tab. The material of the negative electrode current collector can be copper, and the negative electrode active material can be carbon, silicon, etc. The material of the separator can be PP (polypropylene) or PE (polyethylene), etc.

[0043] In the production process of the battery cell, the formation process is a very important step. The formation is mainly a process of the first charging of the battery cell to activate the battery cell. A liquid injection port is provided on the end cover of the battery cell. The electrolyte can be injected into the interior of the housing of the battery cell through the liquid injection port. The liquid injection port is in an open state during the formation process of the battery cell, and the interior of the battery cell is in communication with the external air. Therefore, high requirements are imposed on the external environment of the formation equipment, such as the humidity of the air, etc. The control of the environment of the formation equipment increases the production cost of the battery.

[0044] In view of this, the present application provides a technical solution. In this technical solution, the negative-pressure formation device includes a tray assembly and a negative-pressure assembly. The tray assembly is used to place the battery cell; the negative-pressure assembly includes a bracket, a connecting member, a negative-pressure member, and a first elastic member. The connecting member is installed on the bracket. The negative-pressure member passes through the connecting member and can slide relative to the connecting member. One end of the first elastic member is fixed to the connecting member, and the other end is fixed to the end of the negative-pressure member. The end of the negative-pressure member is used to align with the liquid injection hole of the battery cell to evacuate.

[0045] In the above solution, by aligning the negative-pressure member with the liquid injection hole of the battery cell to seal the liquid injection hole, the interior of the battery cell can be evacuated. Moreover, when the end of the negative-pressure member has contacted the edge of the liquid injection hole, when the bracket continues to drive the connecting member to move downward, the first elastic member will be compressed, so that the end of the negative-pressure member contacts the edge of the liquid injection hole more tightly, improving the sealing effect of evacuation. There is no need to control the humidity of the external environment, etc., reducing the production cost of the battery.

[0046] Figure 1 Schematic structural diagram of a negative pressure formation device according to some embodiments of the present application; Figure 2 Schematic structural diagram of a negative pressure formation device according to some embodiments of the present application; Figure 3 Partial schematic structural diagram of a negative pressure component according to some embodiments of the present application.

[0047] Please refer to Figures 1 - 3 In a first aspect, embodiments of the present application provide a negative pressure formation device 100. The negative pressure formation device 100 includes a tray assembly 10 and a negative pressure assembly 20. The tray assembly 10 is used to place battery cells 200. The negative pressure assembly 20 includes a bracket 21, a connecting member 22, a negative pressure member 23, and a first elastic member 24. The connecting member 22 is installed on the bracket 21. The negative pressure member 23 passes through the connecting member 22 and can slide relative to the connecting member 22. One end of the first elastic member 24 is fixed to the connecting member 22, and the other end is fixed to the end of the negative pressure member 23. The end of the negative pressure member 23 is used to align with the liquid injection hole 210 of the battery cell 200 to evacuate.

[0048] The tray assembly 10 is a component for supporting the battery cells 200. The tray assembly 10 can be a U-shaped tray 11 or a box-shaped tray 11. The tray assembly 10 can be integrally formed or assembled by splicing. The material of the tray assembly 10 can be, but is not limited to, metal, plastic, inorganic non-metal, or wood, etc.

[0049] Multiple rows of battery packs can be placed in the tray assembly 10, and each row of battery packs includes multiple battery cells 200. Correspondingly, multiple rows of brackets 21 can be provided, and multiple negative pressure members 23 can be provided on each bracket 21. Exemplarily, two rows of battery packs are placed in the tray assembly 10, and each row of battery packs includes multiple battery cells 200; two negative pressure assemblies 20 are provided, and the two brackets 21 are respectively provided above the two rows of battery packs in one-to-one correspondence. The multiple negative pressure members 23 on each bracket 21 respectively seal the liquid injection holes 210 of the multiple battery cells 200 of each battery pack in one-to-one correspondence.

[0050] The bracket 21 may include a first mounting plate 211, a second mounting plate 212, and a support member 213 connecting the first mounting plate 211 and the second mounting plate 212. The connecting member 22 is mounted on the first mounting plate 211. The negative pressure member 23 is connected to the air pipe 25, and the air pipe 25 converges at the air hood 26. The air pipe structure at the top end of the air hood 26 communicates with the air pipe joint 271 on the manifold plate 27. The manifold plate 27 is arranged on the second mounting plate 212. A gripping block 214 is also arranged on the second mounting plate 212. The gripping block 214 can be gripped by a manipulator to drive the negative pressure assembly 20 to move. Among them, the gripping block 214 can be in the shape of a T shape, an L shape, etc. By connecting the air pipe 25 structure of the manifold plate 27 to a vacuum device to evacuate the negative pressure member 23, the gas inside the battery cell 200 can be removed.

[0051] The first elastic member 24 can be a spring and is arranged around the outer periphery of the negative pressure member 23. The connecting member 22 may include a clamping seat 221 and a pressing plate 222. The clamping seat 221 is arranged on the first mounting plate 211 of the bracket 21, and the pressing plate 222 is fixed on the clamping seat 221. One end of the first elastic member 24 is fixed to the pressing plate 222, and the other end is fixed to the end of the negative pressure member 23. When the end of the negative pressure member 23 contacts the edge of the liquid injection hole 210 and the bracket 21 moves downward, the pressing plate 222 exerts a force on the first elastic member 24, and the first elastic member 24 is compressed and deformed.

[0052] In the above solution, the negative pressure member 23 is aligned with the liquid injection hole 210 of the battery cell 200 to seal the liquid injection hole 210, and the inside of the battery cell 200 can be evacuated. Moreover, when the end of the negative pressure member 23 has already contacted the edge of the liquid injection hole 210 and the bracket 21 continues to drive the connecting member 22 to move downward, the first elastic member 24 will be compressed, so that the end of the negative pressure member 23 contacts the edge of the liquid injection hole 210 more tightly, improving the sealing effect of the vacuum extraction, without the need to control the humidity of the external environment, etc., and reducing the production cost of the battery.

[0053] Figure 3 It is a partial structural schematic diagram of the negative pressure member of some embodiments of the present application. As Figure 3 shown, in some embodiments, the negative pressure member 23 includes a negative pressure rod 231 and a suction nozzle 232. The negative pressure rod 231 passes through the connecting member 22 and can slide relative to the connecting member 22. The inside of the negative pressure rod 231 is a hollow structure; the suction nozzle 232 is detachably arranged at the end of the negative pressure rod 231, and the suction nozzle 232 is used to align with the liquid injection hole 210 of the battery cell 200 to evacuate the vacuum; among them, the other end of the first elastic member 24 is fixed to the negative pressure rod 231 or fixed to the suction nozzle 232.

[0054] The end of the negative pressure rod 231 and the suction nozzle 232 can be detachably connected by tight fit, clamping, bolts, etc. A through hole for gas flow is provided inside the negative pressure rod 231, and the aperture of the suction nozzle 232 is slightly larger than the diameter of the injection hole 210 so that the edge of the suction nozzle 232 can cover the injection hole 210. The suction nozzle 232 can be made of elastic materials such as rubber, and can produce a certain degree of deformation and compression when in contact with the battery cell 200, so as to further improve the sealing effect during vacuuming.

[0055] In the above solution, the negative pressure rod 231 and the suction nozzle 232 are detachably matched, and when the suction nozzle 232 or the negative pressure rod 231 is damaged, it can be replaced separately, which further reduces the production cost of the battery.

[0056] In some embodiments, a groove 233 is provided at one end of the suction nozzle 232 facing the negative pressure rod 231; the end of the negative pressure rod 231 is inserted into the groove 233 and tightly fits with the groove 233, and the negative pressure rod 231 is provided with a protrusion 234, which abuts against the edge of the groove 233, and the other end of the first elastic member 24 is fixed to the protrusion 234.

[0057] Tight fit means that the clearance between the two parts is relatively small and they are tightly combined together, and are used in situations where looseness needs to be prevented. The size of the end of the negative pressure rod 231 can be similar to the size of the groove 233, so that after the end of the negative pressure rod 231 is inserted into the groove 233, a large force is required to pull out the suction nozzle 232.

[0058] The lower end of the protrusion 234 abuts against the upper end of the suction nozzle 232. The protrusion 234 can be arranged in a surrounding manner along the circumference of the negative pressure rod 231, or can be in a block shape, with multiple protrusions 234 arranged at intervals along the circumference of the negative pressure rod 231. The upper end of the first elastic member 24 is fixed to the pressing plate 222 of the connecting member 22, and the lower end is fixed to the protrusion 234.

[0059] In the above scheme, through the tight fit between the negative pressure rod 231 and the groove 233, and the abutment between the protrusion 234 and the edge of the groove 233, the disassembly and assembly of the negative pressure rod 231 and the suction nozzle 232 can be facilitated, the production and replacement efficiency can be improved, and the production cost of the battery can be further reduced.

[0060] In some embodiments, the negative pressure assembly 20 further includes a retaining member 281 and a second elastic member 282 . The retaining member 281 is disposed on the negative pressure member 23 . One end of the second elastic member 282 is fixed to the retaining member 281 , and the other end is fixed to the connecting member 22 .

[0061] The second elastic member 282 can be a spring, which is disposed around the outer periphery of the negative pressure member 23. Due to the supporting force of the first elastic member 24 and the pulling force of the second elastic member 282 acting on the connecting member 22, the connecting member 22 can be stably sleeved on the outer periphery of the negative pressure member 23 and can slide along the negative pressure member 23.

[0062] When the end of the negative pressure member 23 contacts the edge of the liquid injection hole 210 of the battery cell 200 and the bracket 21 continues to move downward, the first elastic member 24 will be compressed and the second elastic member 282 will be stretched. After the formation process is completed and the bracket 21 moves downward, the connecting member 22 moves upward and resets under the pulling force of the second elastic member 282 and the elastic acting force of the first elastic member 24.

[0063] In the above solution, by connecting the clamping member 281 and the connecting member 22 through the second elastic member 282 respectively, the connecting member 22 can be more stably connected to the negative pressure member 23, and the connecting member 22 can be better reset.

[0064] Figure 1 It is a schematic structural diagram of a negative pressure formation device according to some embodiments of the present application. As Figure 1 shown, in some embodiments, the tray assembly 10 includes a tray 11 and a first locking member 12. The tray 11 is used to place the battery cell 200; the first locking member 12 is disposed on the tray 11, and a second locking member 29 is disposed on the bracket 21. The second locking member 29 is used to lock or unlock with the first locking member 12.

[0065] The first locking member 12 and the second locking member 29 can be locked or unlocked through hooks, buckles, etc. The number of the first locking members 12 can be one or more. For example, the first locking members 12 can be disposed on both the left and right sides of the tray 11, so that both the left and right sides of the bracket 21 can be locked and fixed to the tray 11.

[0066] In the above solution, by mutually locking the first locking member 12 of the tray assembly 10 and the second locking member 29 of the negative pressure assembly 20, the negative pressure member 23 can more accurately evacuate the inside of the battery cell 200, improving the stability during evacuation. By mutually unlocking the first locking member 12 of the tray assembly 10 and the second locking member 29 of the negative pressure assembly 20, it is convenient for the negative pressure assembly 20 to disengage from the tray assembly 10, thereby improving the production efficiency of the battery.

[0067] Figure 4 It is Figure 2 the enlarged schematic view of part A in Figure 5 It is a schematic structural diagram of the first locking member according to some embodiments of the present application; Figure 6 It is a schematic structural diagram of the second locking member according to some embodiments of the present application; Figure 7 It is a schematic cross-sectional view of the second locking member according to some embodiments of the present application.

[0068] Please refer to Figures 4 - 7 In some embodiments, the first locking member 12 includes a column portion 121 and an abutting portion 122 disposed on the outer periphery of the column portion 121. The column portion 121 is disposed on the tray 11; the second locking member 29 includes a sleeve 291 and a hook portion 292. The sleeve 291 is disposed on the bracket 21. The sleeve 291 is provided with a through hole 293 for the column portion 121 to pass through along the first direction X. The hook portion 292 is movably connected to the sleeve 291 along the second direction Y. The first direction X and the second direction Y are intersectingly arranged; the abutting portion 122 is used to abut against the hook portion 292.

[0069] The first direction X and the second direction Y can be perpendicular to each other. For example, the first direction X can be the vertical direction and the second direction Y can be the horizontal direction. The hook portion 292 can pass through the sleeve 291 along the second direction Y and is movable along the second direction Y.

[0070] The column portion 121 can pass through the through hole 293 of the sleeve 291. The abutting portion 122 pushes the hook portion 292 outward, so that the abutting portion 122 can pass through the through hole 293 of the sleeve 291. Then the hook portion 292 moves inward, and the hook portion abuts against the lower part of the abutting portion 122, realizing the interlock between the first locking member 12 and the second locking member 29. The structure is simple and the self-locking is fast and convenient, which can further improve the production efficiency of the battery.

[0071] In some embodiments, the first locking member 12 further includes an unlocking portion 123. The unlocking portion 123 is slidably sleeved on the outer periphery of the column portion 121. The outer edge of the unlocking portion 123 is used to abut against the inner wall of the sleeve 291.

[0072] By continuously moving the bracket 21 downward, the unlocking portion 123 contacts the hook portion 292 and pushes the hook portion 292 outward. When the bracket 21 is lifted, the hook portion 292 drives the unlocking portion 123 to move upward. The unlocking portion 123 is blocked by the abutting portion 122, and the hook portion 292 smoothly disengages from the abutting portion 122, realizing the mutual unlocking between the second locking member 29 and the first locking member 12. The structure is simple and easy to operate, which can further improve the production efficiency of the battery.

[0073] Figure 5 It is a schematic structural diagram of the first locking member in some embodiments of the present application. As Figure 5 shown, in some embodiments, the side surface of the unlocking portion 123 is a first inclined surface 124. In the direction from the sleeve 291 to the unlocking portion 123, the first inclined surface 124 is inclined toward the column portion 121.

[0074] That is to say, the cross-sectional area of the unlocking part 123 gradually narrows from the upper end to the lower end. The sharp corner of the unlocking part 123 abuts against the inner wall of the sleeve 291, and can also slide upward along the column part 121 following the sleeve 291 when the sleeve 291 moves upward. When the upper end surface of the unlocking part 123 contacts the abutting part 122, the unlocking part 123 stops sliding, and the second locking part 29 smoothly disengages from the first locking part 12.

[0075] In the above solution, since the area of the upper end surface of the unlocking part 123 is larger than that of the lower end surface, the first inclined surface 124 is more conducive to the engaging part 292 abutting against the unlocking part 123, and can lift the unlocking part 123 upward more smoothly, so that the first locking part 12 and the second locking part 29 can be quickly unlocked.

[0076] Figure 7 It is a schematic cross-sectional view of the second locking part of some embodiments of the present application. As Figure 7 shown, in some embodiments, the first locking part 12 further includes a third elastic part 125. One end of the third elastic part 125 along the second direction Y is fixed to the engaging part 292, and the other end is fixed to the sleeve 291.

[0077] The third elastic part 125 can be a spring. By continuing to move the bracket 21 downward, the unlocking part 123 contacts the engaging part 292 and pushes the engaging part 292 outward, and the third elastic part 125 is compressed. When the engaging part 292 reaches below the abutting part 122, the engaging part 292 moves inward toward the inside of the sleeve 291 under the elastic force of the third elastic part 125, so that the engaging part 292 is reset and abuts against the lower part of the abutting part 122.

[0078] When the forming process ends, move the bracket 21 downward, the engaging part 292 contacts the unlocking part 123 and receives the force pushing the unlocking part 123 outward, the third elastic part 125 is compressed, and then lift the bracket 21 upward. The engaging part 292 drives the unlocking part 123 to slide upward until the upper end surface of the unlocking part 123 contacts the abutting part 122, and the unlocking part 123 stops sliding. The second locking part 29 smoothly disengages from the first locking part 12, and the elastic force of the third elastic part 125 causes the engaging part 292 to move inward toward the inside of the sleeve 291 and reset. Therefore, the third elastic part 125 in the embodiments of the present application can enable the engaging part 292 to move along the second direction Y and be smoothly reset.

[0079] In some embodiments, the side surface of the abutting part 122 is a second inclined surface 126, and the second inclined surface 126 inclines outward in the direction from the sleeve 291 to the column part 121.

[0080] In the above solution, the second inclined surface 126 has a guiding effect, which can make the engaging portion 292 be more easily pushed outward by the abutting portion 122, and the first locking member 12 and the second locking member 29 can achieve self-locking more quickly.

[0081] In some embodiments, the surface of the engaging portion 292 facing the inside of the sleeve 291 is a third inclined surface 294, and in the direction from the sleeve 291 pointing to the unlocking portion 123, the third inclined surface 294 inclines away from the column portion 121.

[0082] In the above solution, the third inclined surface 294 can make it easier for the abutting portion 122 to apply force to the engaging portion 292, and can abut more closely against the unlocking portion 123, making it easier to lift the unlocking portion 123 upward, thereby achieving quick self-locking and unlocking between the first locking member 12 and the second locking member 29.

[0083] In a second aspect, the embodiments of the present application further provide a battery production device, including the negative pressure formation device 100 according to any one of the above embodiments.

[0084] According to some embodiments of the present application, the present application provides a negative pressure formation device 100, which includes a tray assembly 10 and a negative pressure assembly 20. The tray assembly 10 is used for placing battery cells 200. The negative pressure assembly 20 includes a bracket 21, a connecting member 22, a negative pressure member 23 and a first elastic member 24. The connecting member 22 is installed on the bracket 21. The negative pressure member 23 passes through the connecting member 22 and can slide relative to the connecting member 22. One end of the first elastic member 24 is fixed to the connecting member 22, and the other end is fixed to the end of the negative pressure member 23. The end of the negative pressure member 23 is used to align with the liquid injection hole 210 of the battery cell 200 to evacuate. The negative pressure member 23 includes a negative pressure rod 231 and a suction nozzle 232. The negative pressure rod 231 passes through the connecting member 22 and can slide relative to the connecting member 22. The inside of the negative pressure rod 231 is a hollow structure. The suction nozzle 232 is detachably arranged at the end of the negative pressure rod 231, and the suction nozzle 232 is used to align with the liquid injection hole 210 of the battery cell 200 to evacuate. Wherein, the other end of the first elastic member 24 is fixed to the negative pressure rod 231 or the suction nozzle 232.

[0085] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than limiting them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the various embodiments of the present application, and they should all be covered within the scope of the claims and the description of the present application. In particular, as long as there is no structural conflict, the technical features mentioned in each embodiment can be combined in any way. The present application is not limited to the specific embodiments disclosed in the text, but includes all technical solutions falling within the scope of the claims.

Claims

1. A negative pressure formation device, characterized in that: include: A tray assembly for placing battery cells; A negative pressure component includes a bracket, a connecting member, a negative pressure member and a first elastic member. The connecting member is installed on the bracket, the negative pressure member passes through the connecting member and can slide relative to the connecting member, one end of the first elastic member is fixed to the connecting member, and the other end is fixed to the end of the negative pressure member, and the end of the negative pressure member is used to align with the injection hole of the battery cell to draw a vacuum.

2. The negative pressure formation device according to claim 1, characterized in that: The negative pressure member comprises: A negative pressure rod passes through the connecting piece and can slide relative to the connecting piece, and the interior of the negative pressure rod is a hollow structure; A suction nozzle is detachably arranged at the end of the negative pressure rod, and the suction nozzle is used to align with the injection hole of the battery cell to draw a vacuum; wherein the other end of the first elastic member is fixed to the negative pressure rod or to the suction nozzle.

3. The negative pressure formation device according to claim 2, characterized in that: The suction nozzle is provided with a groove at one end facing the negative pressure rod; The end of the negative pressure rod is inserted into the groove and tightly matched with the groove. The negative pressure rod is provided with a protrusion, which abuts against the edge of the groove. The other end of the first elastic member is fixed to the protrusion.

4. The negative pressure formation device according to claim 1, characterized in that: The negative pressure component also includes: A positioning member, the positioning member being arranged on the negative pressure member; A second elastic member, wherein one end of the second elastic member is fixed to the locking member, and the other end of the second elastic member is fixed to the connecting member.

5. The negative pressure formation device according to claim 1, characterized in that: The tray assembly comprises: A tray for placing the battery cells; A first locking member is arranged on the tray, and a second locking member is arranged on the bracket. The second locking member is used for self-locking or unlocking with the first locking member.

6. The negative pressure formation device according to claim 5, characterized in that: The first locking member includes a column portion and an abutment portion arranged on the outer periphery of the column portion, and the column portion is arranged on the tray; The second locking member includes a sleeve and a hook portion, the sleeve is arranged on the bracket, the sleeve is provided with a through hole for the column portion to pass through along the first direction, the hook portion is movably connected to the sleeve along the second direction, and the first direction and the second direction are arranged to intersect; the abutting portion is used to abut against the hook portion.

7. The negative pressure formation device according to claim 6, characterized in that: The first locking member further comprises an unlocking portion, which is slidably sleeved on the outer periphery of the column portion, and the outer edge of the unlocking portion is used to abut against the inner wall of the sleeve.

8. The negative pressure formation device according to claim 7, characterized in that: The side surface of the unlocking portion is a first inclined surface, and in a direction from the sleeve to the unlocking portion, the first inclined surface is inclined toward a direction close to the column portion.

9. The negative pressure formation device according to claim 6, characterized in that: The first locking member further includes a third elastic member, one end of the third elastic member along the second direction is fixed to the hook portion, and the other end of the third elastic member is fixed to the sleeve.

10. The negative pressure formation device according to claim 6, characterized in that: The side surface of the abutting portion is a second inclined surface, and in a direction from the sleeve to the column portion, the second inclined surface is inclined outward.

11. The negative pressure formation device according to claim 7, characterized in that: A side of the hook portion facing the inside of the sleeve is a third inclined surface, and in a direction from the sleeve to the unlocking portion, the third inclined surface is inclined toward the direction away from the column portion.

12. A battery production device, characterized in that: It comprises the negative pressure formation device according to any one of claims 1-11.

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