Liquid injection device

Abstract

The utility model discloses a liquid injection device which comprises a primary liquid injection mechanism for carrying out primary liquid injection on a battery and a secondary liquid injection mechanism for carrying out secondary liquid injection on the battery in a liquid injection capsule, and is characterized by further comprising a standing mechanism arranged between the primary liquid injection mechanism and the secondary liquid injection mechanism, the standing mechanism comprises a standing vertical warehouse, the standing vertical warehouse comprises a plurality of standing cavities which are sequentially arranged in a stacked mode from bottom to top, the standing cavities are used for containing liquid injection capsules and batteries in the liquid injection capsules, and auxiliary electrifying assemblies and positive and negative pressure circulating assemblies are arranged on the standing cavities. According to the utility model, the electrolyte injected into the battery for the first time can fully infiltrate the interior of the battery cell, so that the quality of the battery is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of battery production equipment, in particular to a liquid injection device. Background Art

[0002] At present, during the production process of batteries, the batteries are generally first injected with electrolyte through an injection device, and then the batteries are placed in a static state through a static device so that the electrolyte injected into the battery can quickly and fully infiltrate the interior of the battery cell.

[0003] The existing liquid injection device generally includes a primary liquid injection mechanism and a secondary liquid injection mechanism. In actual application, the battery is first injected with liquid through the primary liquid injection mechanism, and then the battery is placed in the liquid injection capsule, and then the battery in the liquid injection capsule is injected with liquid for the second time through the secondary liquid injection device. In this structure, since the battery is not left to stand for the first time after the primary liquid injection mechanism injects liquid into the battery, the electrolyte injected into the battery for the first time cannot fully infiltrate the inside of the battery cell, which affects the quality of the battery. Utility Model Content

[0004] In order to overcome the deficiencies of the prior art, the utility model provides a liquid injection device, which can enable the electrolyte injected into the battery for the first time to fully infiltrate the interior of the battery cell, thereby ensuring the quality of the battery.

[0005] The technical solution adopted by the utility model to solve its technical problems is:

[0006] A liquid injection device includes a primary liquid injection mechanism for injecting liquid into a battery for the first time and a secondary liquid injection mechanism for injecting liquid into a battery in a liquid injection capsule for the second time, and also includes a static mechanism arranged between the primary liquid injection mechanism and the secondary liquid injection mechanism, the static mechanism includes a static vertical warehouse, the static vertical warehouse includes a plurality of static cavities stacked in sequence from bottom to top, the static cavity is used to place a liquid injection capsule and the battery in the liquid injection capsule, and the static cavity is provided with an auxiliary power supply component and a positive and negative pressure circulation component.

[0007] As a preferred technical solution, a powered mounting plate is provided at the bottom of the static cavity, and the auxiliary powered component includes a first static probe group and a second static probe group, both of which are arranged on the powered mounting plate.

[0008] As a preferred technical solution, the powered mounting plate includes a bottom plate arranged at the bottom of the static cavity and a top plate arranged at the top of the bottom plate, the top of the bottom plate is provided with a first mounting groove and a second mounting groove, the bottom of the first mounting groove is provided with a first hole position, the bottom of the second mounting groove is provided with a second hole position, the top of the top plate is provided with a placement position, the bottom of the placement position is provided with a first avoidance hole corresponding to the first mounting groove and a second avoidance hole corresponding to the second mounting groove, the first static probe group includes a first probe cover and a first probe arranged through the first probe cover, the first probe cover is arranged in the first In the installation groove, the upper end of the first probe passes through the first avoidance hole and is located in the placement position, the lower end of the first probe passes through the first hole and is located below the bottom plate, the second static probe group includes a second probe cover and a second probe passing through the second probe cover, the second probe cover is arranged in the second installation groove, the upper end of the second probe passes through the second avoidance hole and is located in the placement position, the lower end of the second probe passes through the second hole and is located below the bottom plate, and a lower empty position is provided at the bottom of the static cavity, and the lower ends of the first probe and the second probe are both located in the lower empty position.

[0009] As a preferred technical solution, a positioning pin is provided at the top of the bottom plate, a positioning hole corresponding to the positioning pin is provided at the bottom of the placement position, and the end of the positioning pin passes through the positioning hole and is located in the placement position.

[0010] As a preferred technical solution, the positive and negative pressure circulation component includes a first static plate, a second static plate, a static lifting cylinder, a ventilation block and a blocking block. The top of the static cavity has an upper empty position connected to the interior of the static cavity. The first static plate is arranged in the upper empty position, and the second static plate is located below the first static plate and in the static cavity. The static lifting cylinder is arranged at the top of the first static plate, and the end of the output shaft of the static lifting cylinder passes through the through hole of the first static plate and is connected to the top of the second static plate. The static lifting cylinder is used to drive the second static plate to move up and down. The ventilation block and the blocking block are both arranged at the bottom end of the second static plate. The top of the second static plate is provided with a vacuum hole corresponding to the ventilation block, and the vacuum hole is connected to the interior of the ventilation block. The top of the second static plate is provided with a static joint at a position corresponding to the vacuum hole, and the static joint is connected to the vacuum hole, and the static joint is used to connect to a vacuum device.

[0011] As a preferred technical solution, a stationary guide column is provided at the top of the second stationary plate, the top of the stationary guide column passes through the through hole of the first stationary plate and is located above the first stationary plate, the up and down movement of the second stationary plate can drive the stationary guide column to move up and down, and a stationary linear bearing is provided through the through hole of the first stationary plate, and the stationary linear bearing is sleeved on the outer periphery of the stationary guide column.

[0012] As a preferred technical solution, the primary liquid injection mechanism includes a primary liquid injection frame, a liquid injection linear module, a liquid injection jig and a primary liquid injection component. The liquid injection linear module is arranged on the primary liquid injection frame, the liquid injection jig is arranged on the top of the liquid injection linear module, and the top of the liquid injection jig has a placement groove for placing batteries. The primary liquid injection component is arranged on the primary liquid injection frame and corresponds to one end of the liquid injection linear module. The primary liquid injection component is located above the liquid injection jig, and the liquid injection linear module is used to drive the liquid injection jig to move toward or away from the primary liquid injection component.

[0013] As a preferred technical solution, the primary liquid injection component includes a primary liquid injection mounting plate, a primary liquid injection cup, a primary liquid injection lifting cylinder and a primary liquid injection fixing plate, the primary liquid injection mounting plate corresponds to one end of the liquid injection linear module and is located above the liquid injection fixture, the primary liquid injection cup is arranged at the top of the primary liquid injection mounting plate, the bottom end of the primary liquid injection cup passes through the through hole of the primary liquid injection mounting plate and is located between the primary liquid injection mounting plate and the liquid injection fixture, the bottom end of the primary liquid injection cup is provided with a primary liquid injection nozzle, the primary liquid injection nozzle is connected to the interior of the primary liquid injection cup, and the primary liquid injection A primary liquid injection joint is provided at the top of the liquid cup, and the primary liquid injection joint is connected to the interior of the primary liquid injection cup, and the primary liquid injection joint is used to connect to the liquid supply equipment, the primary liquid injection fixed plate is located above the primary liquid injection mounting plate, and the primary liquid injection lifting cylinder is arranged at the bottom end of the primary liquid injection mounting plate, and the end of the output shaft of the primary liquid injection lifting cylinder passes through the through hole of the primary liquid injection mounting plate and is connected to the primary liquid injection fixed plate, and the primary liquid injection fixed plate is arranged on the primary liquid injection frame, and the primary liquid injection lifting cylinder is used to drive the primary liquid injection mounting plate to move up and down.

[0014] As a preferred technical solution, the secondary liquid injection mechanism includes a secondary liquid injection component, and the secondary liquid injection component includes a secondary liquid injection mounting plate, a secondary liquid injection cup and a secondary liquid injection lifting cylinder, the secondary liquid injection cup is arranged at the top end of the secondary liquid injection mounting plate, the bottom end of the secondary liquid injection cup passes through the through hole of the secondary liquid injection mounting plate and is provided with a liquid injection rod, the end of the liquid injection rod is provided with a secondary liquid injection nozzle, the top end of the secondary liquid injection cup is provided with a secondary liquid injection joint, the secondary liquid injection joint is connected to the secondary liquid injection connecting pipe, the secondary liquid injection connecting pipe is used to connect to the liquid supply equipment, the secondary liquid injection nozzle is connected to the liquid injection rod The interior of the injection rod is connected with the interior of the secondary injection cup, and the secondary injection joint is respectively connected with the interior of the secondary injection cup and the injection connecting pipe. The secondary injection lifting cylinder is arranged at the bottom end of the secondary injection bottom plate and is located above the secondary injection mounting plate. The end of the output shaft of the secondary injection lifting cylinder is connected with the top end of the secondary injection mounting plate. The top end of the secondary injection bottom plate is connected with the secondary injection top plate through a connecting pillar. The secondary injection top plate is arranged on the secondary injection frame. The secondary injection lifting cylinder is used to drive the secondary injection mounting plate to move up and down.

[0015] As a preferred technical solution, the secondary liquid injection mechanism also includes a liquid injection capsule conveying belt, the length direction of the secondary liquid injection mounting plate is the same as the length direction of the liquid injection capsule conveying belt, the secondary liquid injection mounting plate is located above the liquid injection capsule conveying belt, and the secondary liquid injection nozzle is located between the liquid injection rod and the liquid injection capsule conveying belt.

[0016] The beneficial effects of the utility model are as follows: the utility model provides a stationary mechanism between the primary liquid injection mechanism and the secondary liquid injection mechanism, and the liquid injection capsule and the battery in the liquid injection capsule can be placed through the stationary cavity of the stationary mechanism, and the auxiliary power-on component of the stationary mechanism is electrically connected to the positive probe of the positive probe assembly of the liquid injection capsule and the negative probe of the negative probe assembly and to an external power supply, so that the heating plate of the liquid injection capsule can be energized by the external power supply, and the heating plate generates heat after being energized, so that the battery in the liquid injection capsule can be heated, and the positive and negative pressure circulation components of the stationary mechanism are connected to the vacuum equipment, docked with the air inlet of the liquid injection capsule, and the liquid injection port of the liquid injection capsule is blocked, so that the vacuum equipment can alternately evacuate the interior of the battery in the liquid injection capsule and introduce nitrogen through the positive and negative pressure circulation components, so that the battery in the liquid injection capsule can be subjected to high temperature + positive and negative pressure circulation stationary treatment, so that the electrolyte injected into the battery for the first time can fully infiltrate the interior of the battery cell, thereby ensuring the quality of the battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0018] Figure 1 It is a structural schematic diagram of a liquid injection device provided by an embodiment of the utility model;

[0019] Figure 2 yes Figure 1 A structural schematic diagram of a primary liquid injection mechanism of the liquid injection device shown;

[0020] Figure 3 yes Figure 2 A schematic structural diagram of a primary injection assembly of the primary injection mechanism shown;

[0021] Figure 4 yes Figure 2 An exploded schematic diagram of a primary injection assembly of the primary injection mechanism shown;

[0022] Figure 5 yes Figure 1 A schematic structural diagram of a stationary mechanism of the liquid injection device shown;

[0023] Figure 6 yes Figure 5 A schematic diagram of the structure of the stationary chamber, the auxiliary power supply component and the positive and negative pressure circulation component of the stationary mechanism shown;

[0024] Figure 7 yes Figure 5 A schematic diagram of the front view of the stationary chamber, the auxiliary power supply component and the positive and negative pressure circulation component of the stationary mechanism shown;

[0025] Figure 8 yes Figure 6 A schematic diagram of the structure of the power-on mounting plate and the auxiliary power-on components shown;

[0026] Fig. 9 yes Figure 6 An exploded schematic diagram of the power-on mounting plate and auxiliary power-on components shown;

[0027] Fig.10 yes Figure 6 The structural schematic diagram of the positive and negative pressure circulation components shown;

[0028] Fig.11 yes Figure 6 An exploded schematic diagram of the positive and negative pressure circulation components shown;

[0029] Fig.12 yes Figure 1 A schematic structural diagram of a secondary liquid injection assembly of the liquid injection device shown;

[0030] Fig.13 is a schematic diagram of the structure of a liquid injection capsule;

[0031] Fig.14 It is a cross-sectional schematic diagram of the liquid injection capsule and the battery. DETAILED DESCRIPTION

[0032] The following will clearly and completely describe the concept, specific structure and technical effects of the utility model in combination with the embodiments and drawings, so as to fully understand the purpose, characteristics and effects of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of them. Based on the embodiments of the utility model, other embodiments obtained by technicians in this field without creative work are all within the scope of protection of the utility model. In addition, all the connection / connection relationships involved in the patent do not refer to the direct connection of components, but refer to the formation of a better connection structure by adding or reducing connection accessories according to the specific implementation situation. The various technical features in the creation of the utility model can be combined interchangeably without conflicting with each other.

[0033] Please refer to Figure 1 An embodiment of the utility model provides a liquid injection device, which includes a primary liquid injection mechanism 10, a secondary liquid injection mechanism 50, and a stationary mechanism 30 arranged between the primary liquid injection mechanism 10 and the secondary liquid injection mechanism 50.

[0034] Combination Figures 2 to 4 As shown, the primary injection mechanism 10 is used to inject liquid into the battery 501 (see Figure 3 , Figure 4 and Fig.14 ) for the first injection. The first injection mechanism 10 includes a first injection frame, an injection linear module 12, an injection fixture 13 and a first injection assembly 14.

[0035] The primary liquid injection frame includes a first frame 111 and a second frame 112. The first frame 112 is arranged between the second frame 112 and the stationary mechanism 30, and one end of the first frame 111 extends into the second frame 112. The liquid injection linear module 12 is an existing structure. The length direction of the liquid injection linear module 12 is the same as the width direction of the first frame 111. The liquid injection linear module 12 is arranged at the top of the first frame 111, and one end of the liquid injection linear module 12 is located in the second frame 112. The liquid injection fixture 13 is arranged at the top of the liquid injection linear module 12. The top of the liquid injection fixture 13 has a placement groove for placing the battery 501. In actual application, after the battery 501 is placed in the placement groove, the battery 501 partially protrudes from the top of the liquid injection fixture 13. The primary liquid injection component 14 is arranged at the top of the second frame 112 and corresponds to one end of the liquid injection linear module 12. The primary liquid injection component 14 is located above the liquid injection jig 13. The liquid injection linear module 12 is used to drive the liquid injection jig 13 to move toward or away from the primary liquid injection component 14. After the battery 501 is placed in the placement groove of the liquid injection jig 13, the movement of the liquid injection jig 13 can drive the battery 501 to move toward or away from the primary liquid injection component 14.

[0036] The primary liquid injection assembly 14 includes a primary liquid injection mounting plate 141 , a primary liquid injection cup 142 , a primary liquid injection lifting cylinder 146 and a primary liquid injection fixing plate 145 .

[0037] The primary injection mounting plate 141 is located in the second frame 112. The primary injection mounting plate 141 corresponds to one end of the injection linear module 12 and is located above the injection fixture 13. The primary injection cup 142 is arranged at the top of the primary injection mounting plate 141. In this embodiment, the outer periphery of the primary injection cup 142 is formed with an annular primary injection mounting portion 1421, and the primary injection mounting portion 1421 is arranged at the top of the primary injection mounting plate 141 by fasteners such as screws. The primary injection cup 142 is located in the second frame 112 and a portion of the primary injection cup 142 protrudes from the top of the second frame 112. The bottom end of the primary injection cup 142 passes through the through hole 1412 of the primary injection mounting plate 141 and is located between the primary injection mounting plate 141 and the injection fixture 13. The bottom end of the primary injection cup 14 is provided with a primary injection nozzle 144, and the primary injection nozzle 144 is connected to the interior of the primary injection cup 142. In actual application, the primary liquid injection nozzle 144 corresponds to the liquid injection port 5011 at the top of the battery 501 , and the end of the primary liquid injection nozzle 144 is used to cooperate with the liquid injection port 5011 of the battery 501 .

[0038] A primary liquid injection connector 143 is provided at the top of the primary liquid injection cup 142 . The primary liquid injection connector 143 is connected to the interior of the primary liquid injection cup 142 . The primary liquid injection connector 143 is used to connect to a liquid supply device through a primary liquid injection pipeline.

[0039] The primary injection fixing plate 145 is located above the primary injection mounting plate 141, and the primary injection fixing plate 145 is arranged at the top of the second frame 112. The primary injection lifting cylinder 146 is located in the second frame 112 and is arranged at the bottom end of the primary injection mounting plate 141, and the end of the output shaft of the primary injection lifting cylinder 146 passes through the through hole 1411 of the primary injection mounting plate 141 and is connected to the primary injection fixing plate 145. The extension and retraction of the output shaft of the primary injection lifting cylinder 146 can drive the primary injection mounting plate 141 and the primary injection lifting cylinder 146 to move up and down, so that the primary injection mounting plate 141 can be driven up and down by the primary injection lifting cylinder 146, and then the primary injection cup 142, the primary injection nozzle 144, and the primary injection joint 143 can be driven up and down.

[0040] Two first-time injection guide columns 147 are provided at the top of the first-time injection installation plate 141, and the output shaft of the first-time injection lifting cylinder 146 is located between the two first-time injection guide columns 147. The top of the first-time injection guide column 147 passes through the through hole of the first-time injection fixing plate 145 and is located above the first-time injection fixing plate 145. The tops of the two first-time injection guide columns 147 are connected by a first-time injection limiting plate 148. The up and down movement of the first-time injection installation plate 141 can drive the two first-time injection guide columns 147 and the first-time injection limiting plate 148 to move up and down. The first-time injection guide column 147 guides the up and down movement of the first-time injection installation plate 141, and the first-time injection limiting plate 148 limits the downward movement of the two first-time injection guide columns 147. It can be understood that the number of the first-time injection guide columns 147 can be set according to actual conditions. The top of the one-time liquid injection fixed plate 145 is provided with two one-time liquid injection linear bearings 149 corresponding to the two one-time liquid injection guide columns 147 respectively. The two one-time liquid injection linear bearings 149 are respectively sleeved on the outer periphery of the corresponding one-time liquid injection guide columns 147, and the one-time liquid injection linear bearings 149 provide support for the up and down movement of the corresponding one-time liquid injection guide columns 147.

[0041] In actual application, in the initial state, the injection fixture 13 is located between the second frame 112 and the other end of the first frame 111. After the battery 501 is placed in the placement groove of the injection fixture 13, the injection linear module 12 drives the injection fixture 13 and the battery 501 to move toward the direction close to the primary injection assembly 14, so that the battery 501 is located below the primary injection assembly 14. Then, the primary injection mounting plate 141 is driven downward by the primary injection lifting cylinder 146, thereby driving the primary injection cup 142 to move downward until the end of the primary injection nozzle 144 matches the injection port 5011 of the battery 501, and then the electrolyte is injected into the interior of the battery 501 through the liquid supply device through the primary injection pipeline, the primary injection joint 143, the primary injection cup 142, the primary injection nozzle 144, and the injection port 5011 of the battery 501, so that the first injection of the battery 501 can be achieved. After the injection is completed, the primary injection mounting plate 141 is driven upward by the primary injection lifting cylinder 146, thereby driving the primary injection cup 142 to move upward until the end of the primary injection nozzle 144 is separated from the injection port 5011 of the battery 501, and then the injection fixture 13 is driven by the injection linear module 12 to move to the initial position away from the primary injection component 14, thereby driving the battery 501 after the first injection to move to the initial position, and then the battery 501 after the first injection can be taken out from the placement slot of the injection fixture 13.

[0042] In the present embodiment, there are three liquid injection linear modules 12, and the three liquid injection linear modules 12 are arranged at intervals along the length direction of the first frame 111. The number of primary liquid injection components 14 corresponds to the number of liquid injection linear modules 12. The liquid injection fixture 13 at the top of each liquid injection linear module 12 has three placement slots. The number of primary liquid injection cups 142 of the primary liquid injection component 14 corresponds to the number of placement slots, which are also three respectively. Correspondingly, there are also three primary liquid injection connectors 143 of each primary liquid injection component 14 respectively. The three primary liquid injection connectors 143 of each primary liquid injection component 14 are all connected to the same primary liquid injection pipeline, so that the primary liquid injection mechanism 10 of the utility model can realize the first liquid injection for nine batteries 501 at a time, thereby improving production efficiency. Each primary injection assembly 14 has two primary injection lifting cylinders 146, two primary injection fixing plates 145, four primary injection guide columns 147, four primary injection linear bearings, and two primary injection limit plates. The two primary injection lifting cylinders 146 and the two primary injection fixing plates 145 correspond to the two ends of the primary injection mounting plate 141, respectively, and the three primary injection cups 142 are located between the two primary injection fixing plates 145. It can be understood that the number of each component of the primary injection mechanism 10 can be set according to actual conditions.

[0043] Combination Figures 5 to 11 As shown, the static mechanism 30 is used to perform high temperature + positive and negative pressure cycle static treatment on the battery 501 in the liquid injection capsule 502. The static mechanism 30 includes a static vertical warehouse 31. In this embodiment, there are two static vertical warehouses 31, and the two static vertical warehouses 31 are arranged opposite to each other. It can be understood that the number of static vertical warehouses 31 can be set according to actual conditions.

[0044] The static storage 31 includes a plurality of, for example, nine static cavities 32 stacked in sequence from bottom to top. It can be understood that the number of static cavities 32 can be set according to actual conditions. The static cavity 32 is used to place the liquid injection capsule 502 (see Fig.13 and Fig.14 ) and the battery 501 in the liquid injection capsule 502. Fig.13 Fig.14As shown, the liquid injection capsule 502 is an existing structure, and the liquid injection capsule 502 includes a lower cavity 5021 and a buckle cup 5022 (i.e., an upper cavity) covering the top of the lower cavity 5021. The inner wall of the inner cavity of the lower cavity 5021 is provided with a heating plate, and the bottom end of the lower cavity 5021 is provided with a negative electrode probe assembly, a positive electrode probe assembly, and a lower positioning groove. The negative electrode probe assembly includes four negative electrode probes, and the positive electrode probe assembly includes four positive electrode probes. The negative electrode probes and the positive electrode probes are electrically connected to the negative electrode and the positive electrode of the heating plate, respectively, and there are two lower positioning grooves. The top of the buckle cup 5022 is provided with a liquid injection port 5026, an air inlet 5023 and an upper positioning groove 5027. The buckle cup 5022 has a first inner cavity and a second inner cavity located below the first inner cavity. The liquid injection port 5026 and the air inlet 5023 are both connected to the first inner cavity, and the second inner cavity is connected to the inner cavity of the lower cavity 5021. There are two air inlets 5023 and four upper positioning grooves 5027. A liquid injection nozzle 5025 is provided at the top of the second inner cavity, and the liquid injection nozzle 5025 is connected to the first inner cavity.

[0045] The static cavity 32 is provided with an auxiliary power supply component and a positive and negative pressure circulation component. The auxiliary power supply component is used to be electrically connected to an external power supply and to be electrically connected to the positive probe of the positive probe component and the negative probe of the negative probe component of the liquid injection capsule 502. In actual application, the external power supply can supply power to the heating plate of the liquid injection capsule 502 through the auxiliary power supply component and the positive probe of the positive probe component and the negative probe of the negative probe component of the liquid injection capsule 502. The heating plate is powered on to generate heat, so that the battery 501 in the liquid injection capsule 502 can be heated through the heating plate. The positive and negative pressure circulation components are used to connect with the vacuum equipment, to dock with the air inlet 5023 of the liquid injection capsule 502, and to block the liquid injection port 5026 of the liquid injection capsule 502. In actual application, the vacuum equipment can alternately evacuate and introduce nitrogen into the first inner cavity of the buckle cup 5022 of the liquid injection capsule 502 through the positive and negative pressure circulation components, thereby alternately evacuating and introducing nitrogen into the interior of the battery 501 in the liquid injection capsule 502.

[0046] The bottom of the static cavity 32 is provided with an energized mounting plate, and the auxiliary energized assembly includes a first static probe group and a second static probe group. The first static probe group and the second static probe group are both arranged on the energized mounting plate. The first static probe group and the second static probe group are arranged at intervals along the length direction of the energized mounting plate.

[0047] Specifically, the powered mounting plate includes a bottom plate 321 disposed at the bottom of the static cavity 32 and a top plate 322 disposed at the top of the bottom plate 321. The length directions of the bottom plate 321 and the top plate 322 are the same as the width direction of the static cavity 32. The top of the bottom plate 321 is provided with a first mounting groove 3211 and a second mounting groove 3213, the length directions of the first mounting groove 3211 and the second mounting groove 3213 are the same as the width direction of the bottom plate 321, the bottom of the first mounting groove 3211 is provided with a first hole position 3212, and the bottom of the second mounting groove 3213 is provided with a second hole position 3214. The top of the top plate 322 is provided with a placement position 3221 for placing the liquid injection capsule 502 and the battery 501 in the liquid injection capsule 502, and the bottom of the placement position 3221 is provided with a first avoidance hole 3222 corresponding to the first mounting groove 3211 and a second avoidance hole 3223 corresponding to the second mounting groove 3213.

[0048] The first stationary probe group includes a first probe cover 331 and a first probe 332 disposed through the first probe cover 331. The length direction of the first probe cover 331 is the same as the length direction of the first mounting groove 3211. The first probe cover 331 is disposed in the first mounting groove 3211. The upper end of the first probe 332 passes through the first avoidance hole 3222 and is located in the placement position 3221. The lower end of the first probe 332 passes through the first hole position 3212 and is located below the bottom plate 321. The second stationary probe group includes a second probe cover 333 and a second probe 334 disposed through the second probe cover 333. The length direction of the second probe cover 333 is the same as the length direction of the second mounting groove 3213. The second probe cover 333 is disposed in the second mounting groove 3213. The upper end of the second probe 334 passes through the second avoidance hole 3223 and is located in the placement position 3221. The lower end of the second probe 334 passes through the second hole position 3214 and is located below the bottom plate 321. A lower empty space is provided at the bottom of the static cavity 32, and the lower end of the first probe 332 and the lower end of the second probe 334 are both located in the lower empty space. In actual application, the first probe 332 corresponds to the positive probe of the liquid injection capsule 502, the upper end of the first probe 332 is used to be electrically connected to the positive probe of the liquid injection capsule 502, and the lower end of the first probe 332 is used to be electrically connected to an external power supply through a first wire, and the second probe 334 corresponds to the negative probe of the liquid injection capsule 502, the upper end of the second probe 334 is used to be electrically connected to the negative probe of the liquid injection capsule 502, and the lower end of the second probe 334 is used to be electrically connected to an external power supply through a second wire. The liquid injection capsule 502 has four positive probes and four negative probes, respectively, so there are four first probes 332 and four second probes 334, respectively.

[0049] A positioning pin 335 is provided at the top of the bottom plate 321, and a positioning hole 3224 corresponding to the positioning pin 335 is provided at the bottom of the placement position 3221. The end of the positioning pin 335 passes through the positioning hole 3224 and is located in the placement position 3221. In actual application, the positioning pin 335 corresponds to the lower positioning groove of the liquid injection capsule 502, and the end of the positioning pin 335 is used to cooperate with the lower positioning groove to position the bottom end of the lower cavity 5021 of the liquid injection capsule 502, so that the upper end of the first probe 332 is connected to the positive probe of the liquid injection capsule 502, and the upper end of the second probe 334 is connected to the negative probe of the liquid injection capsule 502. There are two lower positioning grooves of the liquid injection capsule 502, so there are two positioning pins 335 in this embodiment.

[0050] The positive and negative pressure circulation assembly 34 includes a first stationary plate 341 , a second stationary plate 342 , a stationary lifting cylinder 343 , a ventilation block 344 and a blocking block 345 .

[0051] The top of the static cavity 32 has an upper empty space connected to the interior of the static cavity 32, and the first static plate 341 is arranged in the upper empty space. The second static plate 342 is located below the first static plate 341 and in the static cavity 32. The top of the first static plate 341 is provided with a static groove 3411, and a static lifting cylinder 343 is arranged at the bottom of the static groove 3411 and the static lifting cylinder 343 partially protrudes from the top of the first static plate 341. The bottom of the static groove 3411 is provided with a through hole, and the end of the output shaft of the static lifting cylinder 343 passes through the through hole of the first static plate 341 and is connected to the top of the second static plate 342. The static lifting cylinder 343 is used to drive the second static plate 342 to move up and down. The ventilation block 344 is a hollow structure. The ventilation block 344 and the blocking block 345 are both arranged at the bottom end of the second static plate 342. In actual application, the ventilation block 344 and the blocking block 345 correspond to the air inlet 5023 and the liquid injection port 5026 of the liquid injection capsule 502, respectively. Fig.13 and Fig.14As shown, the end of the ventilation block 344 is used to cooperate with the air inlet 5023 of the liquid injection capsule 502 to achieve docking with the air inlet 5023 of the liquid injection capsule 502, and the end of the blocking block 345 is used to cooperate with the injection port 5026 of the liquid injection capsule 502 to achieve blocking the injection port 5026 of the liquid injection capsule 502, so that the first inner cavity of the buckle cup 5022 of the liquid injection capsule 502 is not connected to the external environment. The top of the second static plate 342 is provided with vacuum holes corresponding to the ventilation blocks 344, and the vacuum holes are connected to the inside of the ventilation block 344. The top of the second static plate 342 is provided with a static joint 3441 at a position corresponding to the vacuum hole. The static joint 3441 is located between the second static plate 342 and the first static plate 341. The static joint 3441 is connected to the vacuum hole. The static joint 3441 is connected to the vacuum equipment through a vacuum pipeline. The vacuum equipment is, for example, a vacuum pump for exhaustion and inflation. The up and down movement of the second static plate 342 can drive the ventilation block 344, the blocking block 345, and the static joint 3441 to move up and down. There are two air inlets 5023 of the injection capsule 502. Therefore, there are two ventilation blocks 344, vacuum holes, and static joints 3441 in this embodiment, and the two static joints 3441 are connected to the same vacuum pipeline.

[0052] Two stationary guide columns 347 are provided at the top of the second stationary plate 342, and two through holes are provided at the bottom of the stationary groove 3411. The tops of the two stationary guide columns 347 pass through the two through holes of the stationary groove 3411 and are located above the first stationary plate 341. The up and down movement of the second stationary plate 342 can drive the two stationary guide columns 347 to move up and down, and the stationary guide columns 347 play a guiding role in the up and down movement of the second stationary plate 342. It can be understood that the number of stationary guide columns 347 can be set according to actual conditions. Two stationary linear bearings 348 are respectively provided in the two through holes of the stationary groove 3411, and the two stationary linear bearings 348 are respectively sleeved on the outer periphery of the two stationary guide columns 347, and the stationary linear bearings 348 provide support for the up and down movement of the corresponding stationary guide columns 347.

[0053] A positioning member 346 is provided at the bottom end of the second stationary plate 342. In actual application, the positioning member 346 corresponds to the upper positioning groove 5027 of the liquid injection capsule 502. The end of the positioning member 346 is used to cooperate with the upper positioning groove 5027 of the liquid injection capsule 502 to position the top of the buckle cup 5022 of the liquid injection capsule 502, so that the end of the ventilation block 344 is connected to the air inlet 5023 of the liquid injection capsule 502, and the end of the blocking block 345 is matched with the injection port 5026 of the liquid injection capsule 502. There are four upper positioning grooves 5027 of the liquid injection capsule 502, so there are four positioning members 346 in this embodiment.

[0054] In actual application, after the battery 501 after the first injection is taken out from the placement groove of the injection fixture 13, the battery 501 after the first injection is first placed in the injection capsule 502. Specifically, the buckle cup 5022 of the injection capsule 502 is first removed from the top of the lower cavity 5021 of the injection capsule 502, and then the battery 501 after the first injection is placed in the inner cavity of the lower cavity 5021 of the injection capsule 502. At this time, the battery 501 is partially protruding. The battery 501 protrudes from the top of the lower cavity 5021 of the liquid injection capsule 502, and then the buckle cup 5022 of the liquid injection capsule 502 is covered on the top of the lower cavity 5021 of the liquid injection capsule 502, and the portion of the battery 501 protruding from the top of the lower cavity 5021 of the liquid injection capsule 502 is located in the second inner cavity of the buckle cup 5022 of the liquid injection capsule 502, and the liquid injection port 5011 of the battery 501 is matched with the lower end of the liquid injection nozzle 5025 of the buckle cup 5022, as shown in FIG. Fig.14As shown, the battery 501 after the first injection is placed in the injection capsule 502. Then the injection capsule 502 and the battery 501 in the injection capsule 502 are transported to the stationary mechanism 30. Then the stacker 100 moves the injection capsule 502 and the battery 501 in the injection capsule 502 to the bottom of the placement position 3221 in the stationary cavity 32, and the upper end of the first probe 332 is docked with the positive probe of the injection capsule 502, the upper end of the second probe 334 is docked with the negative probe of the injection capsule 502, and the end of the positioning pin 335 is matched with the lower positioning groove of the injection capsule 502, so that the first probe 332 is electrically connected to the positive probe of the injection capsule 502, and the second probe 334 is electrically connected to the negative probe of the injection capsule 502. The negative pole probe of the capsule 502 is electrically connected, so that the external power supply can be electrically connected to the positive pole of the heating plate of the injection capsule 502 through the first probe 332 and the positive pole probe of the injection capsule 502, and can be electrically connected to the negative pole of the heating plate of the injection capsule 502 through the second probe 334 and the negative pole probe of the injection capsule 502. In this way, the heating plate of the injection capsule 502 can be energized by the external power supply, and the heating plate generates heat after being energized, thereby heating the battery 501 in the injection capsule 502, and the heating temperature is, for example, 45°C. Then, the second stationary plate 342 is driven downward by the stationary lifting cylinder 343, thereby driving the ventilation block 344, the blocking block 345, the stationary joint 3441 and the positioning piece 346 to move downward until the end of the ventilation block 344 cooperates with the air inlet 5023 of the injection capsule 502, the end of the blocking block 345 cooperates with the injection port 5026 of the injection capsule 502, and the end of the positioning piece 346 cooperates with the upper positioning groove 5027 of the injection capsule 502. Then, the first inner cavity of the buckle cup 5022 of the injection capsule 502 is alternately evacuated and nitrogen is introduced through the vacuum equipment via the vacuum pipeline, the stationary joint 3441, the vacuum hole, and the inside of the vent block 344. Since the lower end of the injection nozzle 5025 of the injection capsule 502 is matched with the injection port 5011 of the battery 501, the battery 501 in the injection capsule 502 can be alternately evacuated through the first inner cavity of the buckle cup 5022 of the injection capsule 502 and the injection nozzle 5025 of the injection capsule 5022. 1 is evacuated and nitrogen is introduced, so that the electrolyte can alternately infiltrate the interior of the battery 501 and extract bubbles, thereby realizing the breathing infiltration of the battery 501 at high temperature. In this way, the battery 501 in the injection capsule 502 can be subjected to high temperature + positive and negative pressure cycle static treatment through the static mechanism 30. The static treatment time is, for example, 4 hours. In this way, the electrolyte injected into the battery 501 for the first time can fully infiltrate the interior of the battery 501, thereby ensuring the quality of the battery 501.

[0055] In this embodiment, there are four powered mounting plates at the bottom of each static cavity 32, and each placement position 3221 of the powered mounting plate can place two liquid injection capsules 502. There are two auxiliary powered components on each powered mounting plate, so each static cavity 32 can place eight liquid injection capsules 502. There are two positive and negative pressure circulation components in each static cavity 32, and each positive and negative pressure circulation component has eight ventilation blocks 344, four blocking blocks 345, eight static joints 3441, and eight vacuum holes. There are two static lifting cylinders 343 and static grooves for each positive and negative pressure circulation component. There are two 3411, four static guide columns 347, and four static linear bearings 348. The two static grooves 3411 are spaced apart along the length direction of the first static plate 341. Therefore, each static cavity 32 of the utility model can realize high temperature + positive and negative pressure cycle static treatment of the batteries 501 in eight liquid injection capsules 502 at a time, and there are multiple static cavities 32, so multiple batteries 501 can be subjected to high temperature + positive and negative pressure cycle static treatment at a time, thereby improving production efficiency. It can be understood that the number of each component of the static mechanism 30 can be set according to actual conditions.

[0056] Combination Fig.12 As shown, the secondary liquid injection mechanism 50 is used to perform a second liquid injection on the battery 501 in the liquid injection capsule 502. The secondary liquid injection mechanism 50 includes a secondary liquid injection component 51 and a liquid injection capsule conveying belt 52. The secondary liquid injection component 51 is located above the liquid injection capsule conveying belt 52.

[0057] Specifically, the secondary liquid injection assembly 51 includes a secondary liquid injection mounting plate 511 , a secondary liquid injection cup 512 and a secondary liquid injection lifting cylinder 518 .

[0058] The secondary liquid injection mounting plate 511 is located above the liquid injection capsule conveying belt 52, and the length direction of the secondary liquid injection mounting plate 511 is the same as the length direction of the liquid injection capsule conveying belt 52. The secondary liquid injection cup 512 is arranged at the top of the secondary liquid injection mounting plate 511. In this embodiment, the outer periphery of the secondary liquid injection cup 512 is formed with an annular secondary liquid injection mounting portion, and the secondary liquid injection mounting portion is arranged at the top of the secondary liquid injection mounting plate 511 by fasteners such as screws, etc. The bottom end of the secondary liquid injection cup 512 passes through the through hole of the secondary liquid injection mounting plate 511 and is provided with a liquid injection rod 513. The end of the liquid injection rod 513 (the end is the end away from the secondary liquid injection cup 512) is provided with a secondary liquid injection nozzle 514, which is located between the liquid injection rod 513 and the liquid injection capsule conveying belt 52, and the secondary liquid injection nozzle 514 is connected to the inside of the liquid injection rod 513, and the inside of the liquid injection rod 513 is connected to the inside of the secondary liquid injection cup 512. In actual application, the secondary liquid injection nozzle 514 corresponds to the liquid injection port 5026 of the liquid injection capsule 502, and the secondary liquid injection nozzle 514 is used to cooperate with the liquid injection port 5026 of the liquid injection capsule 502. A secondary liquid injection joint 515 is provided at the top of the secondary liquid injection cup 512, and the secondary liquid injection joint 515 is connected to the secondary liquid injection connecting pipe 516. A connecting pipe joint 517 is provided at the top of the secondary liquid injection connecting pipe 516, and the connecting pipe joint 517 is used to connect to the liquid supply device. The secondary liquid injection joint 515 is respectively connected to the inside of the secondary liquid injection cup 512 and the liquid injection connecting pipe 516. The connecting pipe joint 517 is connected to the secondary liquid injection connecting pipe 516.

[0059] In this embodiment, the injection rod 513 is arranged through the connecting plate 5131 and fixed relative to the connecting plate 5131. The connecting plate 5131 is located below the secondary injection installation plate 511. The top of the connecting plate 5131 and the bottom of the secondary injection installation plate 511 are connected by two fixing columns 5132, and the injection rod 513 is located between the two fixing columns 5132. The connecting plate 5131 supports the injection rod 513 to prevent the injection rod 513 from being deformed. It can be understood that the number of fixing columns 5132 can be set according to actual conditions.

[0060] The secondary liquid injection lifting cylinder 518 is arranged at the bottom end of the secondary liquid injection bottom plate 519 and is located above the secondary liquid injection mounting plate 511. The end of the output shaft of the secondary liquid injection lifting cylinder 518 is connected to the top of the secondary liquid injection mounting plate 511. The top of the secondary liquid injection bottom plate 519 is connected to the secondary liquid injection top plate 5192 through the connecting pillar 5191. The secondary liquid injection top plate 5192 is arranged on the secondary liquid injection frame, and the secondary liquid injection frame is arranged on the side of the liquid injection capsule conveying belt 52 away from the static mechanism 30. The secondary liquid injection lifting cylinder 518 is used to drive the secondary liquid injection mounting plate 511 to move up and down, thereby driving the secondary liquid injection cup 512, the liquid injection rod 513, the connecting plate 5131, the fixing column 5132, the secondary liquid injection nozzle 514, the secondary liquid injection joint 515, the secondary liquid injection connecting pipe 516 and the connecting pipe joint 517 to move up and down.

[0061] Two secondary injection guide columns 5111 are provided at the top of the secondary injection installation plate 511, and the secondary injection lifting cylinder 518 is located between the two secondary injection guide columns 5111. The top of the secondary injection guide column 5111 passes through the through hole of the secondary injection bottom plate 519 and is located above the secondary injection bottom plate 519. The up and down movement of the secondary injection installation plate 511 can drive the two secondary injection guide columns 5111 to move up and down, and the two secondary injection guide columns 5111 play a guiding role in the up and down movement of the secondary injection installation plate 511. It can be understood that the number of secondary injection guide columns 5111 can be set according to actual conditions. Two secondary injection linear bearings 5112 corresponding to the two secondary injection guide columns 5111 are provided at the bottom end of the secondary injection bottom plate 519, and the two secondary injection linear bearings 5112 are respectively sleeved on the outer periphery of the corresponding secondary injection guide columns 5111, and the secondary injection linear bearings 5112 provide support for the up and down movement of the corresponding secondary injection guide columns 5111.

[0062] like Figure 1As shown, in this embodiment, a first liquid injection transfer conveyor line 70 and a second liquid injection transfer conveyor line 80 are respectively provided at both ends of the liquid injection capsule conveying belt 52. The first liquid injection transfer conveyor line 70 and the second liquid injection transfer conveyor line 80 are both existing structures, and both include a transfer conveyor line body 71 and a transfer belt 72 arranged at the top of the transfer conveyor line body 71. The length direction of the transfer conveyor line body 71 is perpendicular to the length direction of the liquid injection capsule conveying belt 52. The transfer belt 72 and the transfer conveyor line body 71 are in a cross shape, and the length direction of the transfer belt 72 is the same as the length direction of the liquid injection capsule conveying belt 52. The transfer conveyor line body 71 includes a conveyor frame, a conveyor rack arranged at the top of the conveyor frame, and a conveyor motor. The length direction of the conveyor rack is the same as the length direction of the conveyor frame. The transfer belt 72 is an existing roller chain conveyor belt. The transfer belt 72 is slidably set on the top of the conveyor frame through a conventional slide rail slider assembly. The conveying motor is set at the bottom end of the transfer belt 72. The end of the output shaft of the conveying motor is sleeved with a conveying gear, which is meshed with the conveying rack. The conveying motor is used to drive the conveying gear to rotate. Under the action of the meshing of the conveying gear and the conveying rack, the conveying gear can move along the conveying rack, thereby driving the conveying motor and the transfer belt 72 to move along the length direction of the conveying frame toward or away from the liquid injection capsule conveying belt 52.

[0063] In actual application, after the battery 501 in the liquid injection capsule 502 is statically treated by the static mechanism 30, the liquid injection capsule 502 in the static cavity 32 and the battery 501 in the liquid injection capsule 502 are first transported to the transfer belt 72 of the first liquid injection transfer conveyor line 70 by the stacker 100, and then the conveying motor of the first liquid injection transfer conveyor line 70 drives the conveying gear to rotate, thereby driving the transfer belt 72 of the first liquid injection transfer conveyor line 70 to move toward the direction close to the liquid injection capsule conveying belt 52 until the first liquid injection transfer conveyor line 70 is reached. The transfer belt 72 of the conveyor line 70 is connected to one end of the liquid injection capsule conveyor belt 52, and then the transfer belt 72 of the first liquid injection transfer conveyor line 70 drives the liquid injection capsule 502 and the battery 501 in the liquid injection capsule 502 to move toward the direction close to the liquid injection capsule conveyor belt 52, so that the liquid injection capsule 502 and the battery 501 in the liquid injection capsule 502 can be transported to the liquid injection capsule conveyor belt 52. In this way, the liquid injection capsule 502 and the battery 501 in the liquid injection capsule 502 can be transported through the liquid injection capsule conveyor belt 52. When the liquid injection capsule 502 reaches the bottom of the secondary liquid injection assembly 51, the secondary liquid injection lifting cylinder 518 drives the secondary liquid injection mounting plate 511 to move downward, thereby driving the secondary liquid injection cup 512, the liquid injection rod 513, the secondary liquid injection nozzle 514, and the connecting plate 5131 to move downward until the secondary liquid injection nozzle 514 matches the liquid injection port 5026 of the liquid injection capsule 502. Then, the electrolyte can be injected into the first inner cavity of the buckle cup 5022 of the liquid injection capsule 502 through the liquid supply device through the connecting pipe joint 517, the secondary liquid injection connecting pipe 516, the secondary liquid injection joint 515, the secondary liquid injection cup 512, the liquid injection rod 513, and the secondary liquid injection nozzle 514. The electrolyte in the first inner cavity of the buckle cup 5022 can enter the battery 501 in the liquid injection capsule 502 through the liquid injection nozzle 5025 of the buckle cup 5022, so that the battery 501 in the liquid injection capsule 502 can be injected for the second time. After the injection is completed, the secondary injection mounting plate 511 is driven upward by the secondary injection lifting cylinder 518, thereby driving the secondary injection cup 512, the injection rod 513, the connecting plate 5131, and the secondary injection nozzle 514 to move upward, so that the secondary injection nozzle 514 can be separated from the injection port 5026 of the injection capsule 502, and then the injection capsule 502 and the battery 501 in the injection capsule 502 are continued to be transported through the injection capsule conveying belt 52.At the same time, the conveying motor of the second liquid injection transfer conveyor line 80 drives the conveying gear to rotate, thereby driving the transfer belt 72 of the second liquid injection transfer conveyor line 80 to move toward the direction close to the liquid injection capsule conveying belt 52, until one end of the transfer belt 72 of the second liquid injection transfer conveyor line 80 is connected with the other end of the liquid injection capsule conveying belt 52, so that the liquid injection capsule 502 after the second liquid injection and the battery 501 in the liquid injection capsule 502 can be transported to the transfer belt 72 of the second liquid injection transfer conveyor line 80 through the liquid injection capsule conveying belt 52, and then the conveying motor of the second liquid injection transfer conveyor line 80 drives the conveying gear to rotate, thereby driving the transfer belt 72 of the second liquid injection transfer conveyor line 80 to move away from the liquid injection capsule conveying belt 52 to a predetermined position, so that the liquid injection capsule 502 and the battery 501 of the liquid injection capsule 502 can be moved to a predetermined position to wait for the next process.

[0064] In this embodiment, there are two secondary liquid injection components 51, and the two secondary liquid injection components 51 are arranged side by side along the length direction of the liquid injection capsule conveying belt 52. Each secondary liquid injection component 51 has four secondary liquid injection cups 512, four liquid injection rods 513, four secondary liquid injection nozzles 514, four connecting plates 5131, and four secondary liquid injection joints 515, and the four secondary liquid injection joints 515 are connected to the same secondary liquid injection connecting pipe 516, so that the utility model can perform a second liquid injection on the batteries 501 in eight liquid injection capsules 502 at a time, thereby improving production efficiency. Each secondary liquid injection component 51 has two secondary liquid injection lifting cylinders 518, and the two secondary liquid injection lifting cylinders 518 are respectively close to the two ends of the secondary liquid injection mounting plate 511, and the number of the secondary liquid injection bottom plate 519 and the secondary liquid injection top plate 5192 corresponds to the number of the secondary liquid injection lifting cylinders 518. It can be understood that the number of each component of the secondary liquid injection component 51 can be set according to actual conditions.

[0065] The utility model sets a stationary mechanism 30 between the primary injection mechanism 10 and the secondary injection mechanism 50, and the stationary cavity 32 of the stationary mechanism 30 can be used to place the injection capsule 502 and the battery 501 in the injection capsule 502. The auxiliary power supply component of the stationary mechanism 30 is electrically connected to the positive probe of the positive probe assembly of the injection capsule 502 and the negative probe of the negative probe assembly, and is electrically connected to the external power supply, so that the heating plate of the injection capsule 502 can be powered by the external power supply, and the heating plate generates heat after being powered, so that the battery 501 in the injection capsule 502 can be powered. After heating, the positive and negative pressure circulation components of the static mechanism 30 are connected to the vacuum equipment, docked with the air inlet 5023 of the liquid injection capsule 502, and the liquid injection port 5026 of the liquid injection capsule 502 is blocked, so that the vacuum equipment can alternately evacuate and introduce nitrogen into the battery 501 in the liquid injection capsule 502 through the positive and negative pressure circulation components, so that the battery 501 in the liquid injection capsule 502 can be subjected to high temperature + positive and negative pressure circulation static treatment, so that the electrolyte injected into the battery 501 for the first time can fully infiltrate the interior of the battery 501 cell, thereby ensuring the quality of the battery 501.

[0066] The above is a specific description of the preferred implementation of the utility model, but the invention of the utility model is not limited to the described embodiments. Technical personnel familiar with the field can also make various equivalent deformations or substitutions without violating the spirit of the utility model. These equivalent deformations or substitutions are all included in the scope defined by the claims of this application.

Claims

1. A liquid injection device, comprising a primary liquid injection mechanism for injecting liquid into a battery for the first time and a secondary liquid injection mechanism for injecting liquid into a battery in a liquid injection capsule for the second time, characterized in that: It also includes a static mechanism arranged between the primary liquid injection mechanism and the secondary liquid injection mechanism, the static mechanism includes a static vertical warehouse, the static vertical warehouse includes a plurality of static cavities stacked in sequence from bottom to top, the static cavity is used to place the liquid injection capsule and the battery in the liquid injection capsule, and the static cavity is provided with an auxiliary power supply component and a positive and negative pressure circulation component.

2. The liquid injection device according to claim 1, characterized in that: A powered mounting plate is provided at the bottom of the static cavity, and the auxiliary powered assembly includes a first static probe group and a second static probe group, and the first static probe group and the second static probe group are both provided on the powered mounting plate.

3. The liquid injection device according to claim 2, characterized in that: The powered mounting plate comprises a bottom plate arranged at the bottom of the static cavity and a top plate arranged at the top of the bottom plate, the top of the bottom plate is provided with a first mounting groove and a second mounting groove, the bottom of the first mounting groove is provided with a first hole position, the bottom of the second mounting groove is provided with a second hole position, the top of the top plate is provided with a placement position, the bottom of the placement position is provided with a first avoidance hole corresponding to the first mounting groove and a second avoidance hole corresponding to the second mounting groove, the first static probe group comprises a first probe cover and a first probe arranged through the first probe cover, the first probe cover is arranged in the first mounting groove, The upper end of the first probe passes through the first avoidance hole and is located in the placement position, the lower end of the first probe passes through the first hole and is located below the bottom plate, the second static probe group includes a second probe cover and a second probe passing through the second probe cover, the second probe cover is arranged in the second mounting groove, the upper end of the second probe passes through the second avoidance hole and is located in the placement position, the lower end of the second probe passes through the second hole and is located below the bottom plate, a lower empty position is provided at the bottom of the static cavity, and the lower ends of the first probe and the second probe are both located in the lower empty position.

4. The liquid injection device according to claim 3, characterized in that: A positioning pin is provided at the top of the bottom plate, a positioning hole corresponding to the positioning pin is provided at the bottom of the placement position, and a distal end of the positioning pin passes through the positioning hole and is located in the placement position.

5. The liquid injection device according to claim 1, characterized in that: The positive and negative pressure circulation component includes a first static plate, a second static plate, a static lifting cylinder, a ventilation block and a blocking block, the top of the static cavity has an upper empty position connected to the interior of the static cavity, the first static plate is arranged in the upper empty position, the second static plate is located below the first static plate and in the static cavity, the static lifting cylinder is arranged at the top of the first static plate, the end of the output shaft of the static lifting cylinder passes through the through hole of the first static plate and is connected to the top of the second static plate, the static lifting cylinder is used to drive the second static plate to move up and down, the ventilation block and the blocking block are both arranged at the bottom end of the second static plate, the top of the second static plate is provided with a vacuum hole corresponding to the ventilation block, the vacuum hole is connected to the interior of the ventilation block, the top of the second static plate is provided with a static joint at the position corresponding to the vacuum hole, the static joint is connected to the vacuum hole, and the static joint is used to connect to a vacuum device.

6. The liquid injection device according to claim 5, characterized in that: A stationary guide column is provided at the top end of the second stationary plate, and the top end of the stationary guide column passes through the through hole of the first stationary plate and is located above the first stationary plate. The up and down movement of the second stationary plate can drive the stationary guide column to move up and down. A stationary linear bearing is provided through the through hole of the first stationary plate, and the stationary linear bearing is sleeved on the outer periphery of the stationary guide column.

7. The liquid injection device according to claim 1, characterized in that: The primary liquid injection mechanism includes a primary liquid injection frame, a liquid injection linear module, a liquid injection jig and a primary liquid injection component. The liquid injection linear module is arranged on the primary liquid injection frame, the liquid injection jig is arranged on the top of the liquid injection linear module, and the top of the liquid injection jig has a placement groove for placing batteries. The primary liquid injection component is arranged on the primary liquid injection frame and corresponds to one end of the liquid injection linear module. The primary liquid injection component is located above the liquid injection jig, and the liquid injection linear module is used to drive the liquid injection jig to move toward or away from the primary liquid injection component.

8. The liquid injection device according to claim 7, characterized in that: The primary injection assembly includes a primary injection mounting plate, a primary injection cup, a primary injection lifting cylinder and a primary injection fixing plate, the primary injection mounting plate corresponds to one end of the injection linear module and is located above the injection fixture, the primary injection cup is arranged at the top end of the primary injection mounting plate, the bottom end of the primary injection cup passes through the through hole of the primary injection mounting plate and is located between the primary injection mounting plate and the injection fixture, the bottom end of the primary injection cup is provided with a primary injection nozzle, the primary injection nozzle is connected to the interior of the primary injection cup, the top end of the primary injection cup A primary liquid injection joint is provided, which is connected to the interior of the primary liquid injection cup, and is used to connect to the liquid supply equipment. The primary liquid injection fixed plate is located above the primary liquid injection mounting plate. The primary liquid injection lifting cylinder is arranged at the bottom end of the primary liquid injection mounting plate. The end of the output shaft of the primary liquid injection lifting cylinder passes through the through hole of the primary liquid injection mounting plate and is connected to the primary liquid injection fixed plate. The primary liquid injection fixed plate is arranged on the primary liquid injection frame, and the primary liquid injection lifting cylinder is used to drive the primary liquid injection mounting plate to move up and down.

9. The liquid injection device according to claim 1, characterized in that: The secondary liquid injection mechanism includes a secondary liquid injection component, which includes a secondary liquid injection mounting plate, a secondary liquid injection cup and a secondary liquid injection lifting cylinder. The secondary liquid injection cup is arranged at the top of the secondary liquid injection mounting plate. The bottom end of the secondary liquid injection cup passes through the through hole of the secondary liquid injection mounting plate and is provided with a liquid injection rod. The end of the liquid injection rod is provided with a secondary liquid injection nozzle. The top of the secondary liquid injection cup is provided with a secondary liquid injection joint. The secondary liquid injection joint is connected to a secondary liquid injection connecting pipe. The secondary liquid injection connecting pipe is used to connect to a liquid supply device. The secondary liquid injection nozzle is communicated with the inside of the liquid injection rod. The interior of the injection rod is connected to the interior of the secondary injection cup, and the secondary injection joint is respectively connected to the interior of the secondary injection cup and the injection connecting pipe. The secondary injection lifting cylinder is arranged at the bottom end of the secondary injection bottom plate and is located above the secondary injection mounting plate. The end of the output shaft of the secondary injection lifting cylinder is connected to the top end of the secondary injection mounting plate. The top end of the secondary injection bottom plate is connected to the secondary injection top plate through a connecting pillar. The secondary injection top plate is arranged on the secondary injection frame. The secondary injection lifting cylinder is used to drive the secondary injection mounting plate to move up and down.

10. The liquid injection device according to claim 9, characterized in that: The secondary liquid injection mechanism also includes a liquid injection capsule conveying belt. The length direction of the secondary liquid injection mounting plate is the same as the length direction of the liquid injection capsule conveying belt. The secondary liquid injection mounting plate is located above the liquid injection capsule conveying belt. The secondary liquid injection nozzle is located between the liquid injection rod and the liquid injection capsule conveying belt.

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