Vacuum liquid injection machine of battery

Abstract

A vacuum liquid injection machine of a battery comprises a base, a clamp, a plurality of metering pump vacuum boxes and a lifter, the lifter is in driving connection with the vacuum boxes to control the vacuum boxes to ascend and descend, when the vacuum boxes are located at the lowest position, the vacuum boxes make airtight contact with the base and cover the clamp, and the clamp comprises a support, a positioning seat and a plurality of liquid injection cylinders. The positioning seat and the liquid injection cylinder are arranged on the support, the liquid injection cylinder is located over the positioning seat, the metering pump is arranged in the vacuum box and located over the liquid injection cylinder, the liquid injection cylinder comprises a cylinder body and a needle body, and the needle body is located under the cylinder body and communicated with the cylinder body; a needle tube and a sucker are arranged at the lower end of the needle body, and the sucker surrounds the needle tube. The vacuum liquid injection machine disclosed by the utility model can accurately control the amount of the dropped electrolyte, and can avoid air leakage during liquid injection, so that the amount of the electrolyte injected into a battery can be accurately controlled.

Description

Technical Field

[0001] The utility model relates to a vacuum liquid filling machine, in particular to a vacuum liquid filling machine for batteries. Background Art

[0002] During the manufacturing process of square batteries, electrolyte needs to be injected into the interior of its aluminum shell. Currently, the most common method of injection is to use a vacuum injection machine. Specifically, during the injection process, the battery is placed inside the vacuum injection machine, and the injection cylinder of the vacuum injection machine is connected to the interior of the battery. The vacuum injection machine first evacuates the interior of the battery, making the interior of the battery and its surrounding environment a vacuum state. Then, the injection pump is used to drip the electrolyte into the injection cylinder. The vacuum injection machine is then filled with gas to release the vacuum state. The gas pushes the liquid in the injection cylinder into the interior of the battery, thus completing the injection.

[0003] However, the existing liquid injection cylinder is connected to the interior of the battery only by inserting an infusion tube into the battery. The airtightness of the connection is poor. When the vacuum state is released, some gas will enter the battery from the liquid injection port of the battery, occupying the internal space of the battery. Part of the electrolyte cannot enter smoothly, resulting in insufficient electrolyte entering the battery.

[0004] In addition, most existing vacuum liquid injection machines use general liquid pumps for liquid injection. Due to the influence of the vacuum state, the output of the electrolyte is difficult to control, which also affects the amount of electrolyte entering the battery. Utility Model Content

[0005] In order to overcome the shortcomings and deficiencies in the prior art, the purpose of the present invention is to design a vacuum liquid injection machine that can accurately control the amount of electrolyte dripped in, while ensuring that the injection position has good airtightness, so that the amount of electrolyte injected into the battery meets the requirements.

[0006] To achieve the above-mentioned purpose, the utility model provides a vacuum liquid injection machine for batteries, comprising: a base, a clamp, a vacuum box, and a lifter. The clamp and the lifter are both arranged on the base. The lifter is connected to the vacuum box drive to control the lifting and lowering of the vacuum box. When the vacuum box is at the lowest position, the vacuum box is in airtight contact with the base and the vacuum box covers the clamp. The clamp comprises: a bracket, a positioning seat and a plurality of liquid injection cylinders. The positioning seat and the liquid injection cylinder are both arranged on the bracket. The liquid injection cylinder is located directly above the positioning seat. The vacuum liquid injection machine also comprises: a plurality of metering pumps. The metering pumps are arranged in the vacuum box and directly above the liquid injection cylinder. The liquid injection cylinder comprises: a barrel and a needle body. The needle body is located directly below the barrel and is connected to the barrel. The lower end of the needle body is provided with a needle tube and a suction cup, and the suction cup is arranged around the needle tube.

[0007] Furthermore, the outer diameter of the needle body is smaller than that of the barrel body; the barrel body includes an inlet tube and an outlet tube, the outlet tube being located directly below and connected to the inlet tube, the inner and outer diameters of the outlet tube being smaller than those of the inlet tube, respectively, and the outlet tube being inserted into the needle body. Currently, some batteries have two tabs protruding from the upper surface of the aluminum shell. This smaller outer diameter needle can avoid the tabs and be inserted into the battery's injection port, making the injection barrel more versatile.

[0008] Furthermore, the positioning base includes a base, several levers, several push rods, and several elastic members. The levers are rotatably mounted on the base, and the push rods are vertically movable on the base. The levers are pivotally connected to the push rods, and the upper and lower ends of the elastic members abut against the push rods and the base, respectively. The user only needs to rotate the levers to control the lifting and lowering movement of the push rods, which, in conjunction with the elastic members, compress the battery, making operation relatively simple.

[0009] Furthermore, the upper end of the base is provided with a plurality of positioning slots, and the lower end of the base is provided with a plurality of rotation slots. The positioning slots and the rotation slots are connected by a sliding channel. The lever is located in the rotation slot, and the push rod passes through the sliding channel. The positioning slots can play a role in pre-positioning the battery, prompting the user to place the battery.

[0010] Furthermore, the lever is provided with an air-avoidance hole and a pull shaft, the pull shaft extending through the air-avoidance hole in the left-right direction; the upper end of the push rod is provided with a head, the lower end of the push rod is provided with a hook, at least a portion of the head is located in the positioning groove, the hook is located in the air-avoidance hole and engages with the pull shaft, the head is provided with an upper abutment surface, the sliding channel is provided with a lower abutment surface, and the upper and lower ends of the elastic member abut against the upper and lower abutment surfaces, respectively. The air-avoidance hole can be provided to prevent interference with the push rod during the rotation of the lever.

[0011] Furthermore, the bracket is provided with two vertically arranged strip holes, and the left and right ends of the base are provided with screw holes. The positioning base also includes two fine-tuning screws, which pass through the strip holes and screw into the screw holes. The strip holes and the fine-tuning screws can be used to adjust the vertical position of the base, thereby making the clamp suitable for batteries of different heights.

[0012] Furthermore, the vacuum box includes a box body and two air pumps. The metering pump extends through the top wall of the box body, and the elevator is connected to the box body. The two air pumps are respectively an air extraction pump and an air filling pump, and both are connected to the box body. The air extraction pump and the air filling pump can be provided to suck air and fill nitrogen, thereby reducing the water content in the battery and improving battery quality. In addition, the provision of a suction cup prevents electrolyte from overflowing outside the injection cylinder during the cyclic suction and filling process.

[0013] Further, the vacuum box further comprises a sealing ring located at the lower end of the box body, and the sealing ring is in airtight contact with the base when the vacuum box is in the lowest position.

[0014] Further, the two lifters comprise a pneumatic cylinder and a lifting block, the piston rod of the pneumatic cylinder is vertically arranged and fixedly connected with the lifting block, and the lifting blocks of the two lifters are fixedly connected with the left end and the right end of the box body respectively.

[0015] Further, the vacuum liquid injection machine further comprises a group of safety grating located at the front side of the vacuum box.

[0016] After the above technical scheme is adopted, the beneficial effects are as follows: the vacuum liquid injection machine of the present application adopts the metering pump, so that the amount of the electrolyte dropped can be accurately controlled, the injection cylinder comprises a cylinder body and a needle body, and a suction disc is arranged around the needle tube of the needle body, so that the injection port of the battery can be sealed by the suction disc, air leakage during the injection can be avoided, and the amount of the electrolyte injected into the battery can be accurately controlled. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 FIG. 1 is a schematic view of the vacuum liquid injection machine according to the present application;

[0018] Figure 2 FIG. 4 is an internal view of the vacuum box according to the present application;

[0019] Figure 3 FIG. 6 is a schematic view of the positioning seat according to the present application;

[0020] Figure 4 FIG. 7 is an A-A sectional view of the positioning seat according to the present application;

[0021] Figure 5 FIG. 8 is a schematic view of the injection cylinder according to the present application.

[0022] The reference signs are: 1, base; 2, clamp; 21, support; 210, strip-shaped hole; 22, positioning seat; 221, seat body; 2211, positioning groove; 2212, rotating groove; 2213, sliding channel; 222, lever; 2221, clearance hole; 2222, pull shaft; 223, top rod; 2231, top head; 2232, pull hook; 224, elastic piece; 225, adjusting screw; 23, liquid injection cylinder; 231, cylinder body; 2311, input pipe; 2312, output pipe; 232, needle body; 2321, needle pipe; 2322, suction disc; 3, metering pump; 4, vacuum box; 41, box body; 42, air pump; 43, sealing ring; 5, lifter; 51, air cylinder; 52, lifting block; 6, safety grating. DETAILED DESCRIPTION

[0023] The technical scheme of the utility model is further described below through examples:

[0024] The utility model provides a vacuum liquid injection machine of battery, combines Figures 1-2 As shown in the figure, the vacuum liquid injection machine comprises a base 1, a clamp 2, a plurality of metering pumps 3, a vacuum box 4, a lifter 5 and a set of safety gratings 6, the clamp 2 and the lifter 5 are both arranged on the base 1, the lifter 5 is drivingly connected with the vacuum box 4 to control the lifting of the vacuum box 4, when the vacuum box 4 is located at the lowest position, the vacuum box 4 is in airtight contact with the base 1 and covers the clamp 2, the metering pump 3 is arranged on the vacuum box 4 and located directly above the clamp 2, and the safety grating 6 is located at the front side of the vacuum box 4. Before work, the vacuum box 4 is first lifted by the lifter 5, the user places a battery 100 in the clamp 2, and then the vacuum box 4 is lowered by the lifter 5 to completely cover the clamp 2 and be in airtight contact with the base 1; during work, the vacuum box 4 is first used to vacuum its interior, so that the battery 100 and its surrounding environment are in a vacuum state, then the metering pump 3 is used to quantitatively drop electrolyte into the clamp 2, and then the vacuum box 4 is used to inflate, the inflated gas pushes the electrolyte from the clamp 2 into the interior of the battery 100, so that the liquid injection operation is completed, finally the vacuum box 4 is lifted by the lifter 5, and the user takes out the battery 100 from the clamp 2. In addition, the safety grating comprises two left and right opposite grating infrared sensors, before work or during work, if the safety grating 6 detects that a human body approaches the vacuum box 4, the action of the lifter 5 is stopped.

[0025] Specifically, the clamp 2 comprises a support 21, a positioning seat 22 and a plurality of liquid injection cylinders 23, the positioning seat 22 and the liquid injection cylinders 23 are arranged on the support 21, the liquid injection cylinders 23 are located directly above the positioning seat 22, and the metering pump 3 is located directly above the liquid injection cylinders 23. Before work, the user places the battery 100 on the positioning seat 22, the liquid injection cylinders 23 are in communication with the inside of the battery 100, and the positioning seat 22 and the liquid injection cylinders 23 cooperate to clamp the battery 100 in the up-down direction; during work, the metering pump 3 drops the electrolyte into the liquid injection cylinders 23, and the gas filled during inflation pushes the electrolyte in the liquid injection cylinders 23 into the inside of the battery 100.

[0026] More specifically, as shown in Figure 3 The positioning seat 22 comprises a seat body 221, a plurality of levers 222, a plurality of top rods 223 and a plurality of elastic members 224, the levers 222 are rotatably arranged on the seat body 221, the top rods 223 are movably arranged on the seat body 221, the levers 222 are pivotally connected with the top rods 223, and the upper and lower ends of the elastic members 224 are in abutment with the top rods 223 and the seat body 221 respectively. When placing the battery 100, first rotate the lever 222 downward to make the top rod 223 descend, at this time the elastic member 224 is compressed, then place the battery 100 on the top rod 223, and finally release the lever 222, the elastic member 224 restores to make the top rod 223 rise, and the liquid injection cylinder 23 cooperates to compress the battery 100.

[0027] In this embodiment, the elastic member 224 is a spring, and in other embodiments, the elastic member 224 can also be other elastic elements, such as a spring piece.

[0028] More specifically, as shown in Figure 4 The upper end of the seat body 221 is provided with a plurality of positioning grooves 2211, the lower end of the seat body 221 is provided with a plurality of rotating grooves 2212, the positioning grooves 2211 and the rotating grooves 2212 are in communication through a sliding channel 2213, the lever 222 is located in the rotating groove 2212, and the top rod 223 passes through the sliding channel 2213. Before rotating the lever 222 downward, the lever 222 is in contact with at least two positions on the top surface of the rotating groove 2212, one position serves as the fulcrum of the lever 222, and the other position serves as the limiting point of upward rotation of the lever 222.

[0029] More specifically, the lever 222 is provided with a clearance hole 2221 and a pull shaft 2222. The pull shaft 2222 extends through the clearance hole 2221 in the left-right direction. The upper end of the push rod 223 is provided with a head 2231, and the lower end of the push rod 223 is provided with a hook 2232. At least a portion of the head 2231 is located in the positioning groove 2211. The hook 2232 is located in the clearance hole 2221 and engages with the pull shaft 2222. The head 2231 is provided with an upper abutment surface, and the sliding channel 2213 is provided with a lower abutment surface. The upper and lower ends of the elastic member 224 abut against the upper and lower abutment surfaces, respectively. Before placing the battery 100, the lever 222 is rotated downward, and the pull shaft 2222 is used to pull the hook 2232, causing the push rod 223 to descend. After the battery 100 is placed, the head 2231 contacts the battery.

[0030] More specifically, combined Figures 2-3 As shown, the bracket 21 has two vertically arranged strip holes 210, and the base 221 has screw holes on both the left and right ends. The positioning base 22 also includes two fine-tuning screws 225, which pass through the strip holes 210 and are screwed into the screw holes. Before operation, the vertical position of the positioning base 22 can be adjusted by changing the relative position of the fine-tuning screws 225 and the strip holes 210.

[0031] More specifically, if Figure 5 As shown, the injection cylinder 23 includes a cylinder 231 and a needle 232. The needle 232 is located directly below the cylinder 231 and is connected to the cylinder 231. The outer diameter of the needle 232 is smaller than the outer diameter of the cylinder 231. During operation, the electrolyte drips into the cylinder 231 and flows into the interior of the battery 100 through the needle 232.

[0032] More specifically, the barrel 231 includes an input tube 231 and an output tube 232. The output tube 232 is located directly below and communicates with the input tube 231. The inner and outer diameters of the output tube 232 are smaller than those of the input tube 231, respectively. The output tube 232 is inserted into the needle body 232. A needle tube 2321 and a suction cup 2322 are provided at the lower end of the needle body 232. The suction cup 2322 is arranged around the needle tube 2321. During operation, the electrolyte, driven by gas, passes through the input tube 231 and the output tube 232 in sequence, ultimately entering the interior of the battery 100 through the needle tube 2321.

[0033] In this embodiment, there are multiple metering pumps 3, liquid injection cylinders 23, levers 222, push rods 223, elastic members 224, positioning grooves 2211, rotating grooves 2212 and sliding channels 2213. Multiple metering pumps 3 are arranged at left and right intervals. Correspondingly, multiple battery placement positions of multiple liquid injection cylinders 23 and positioning seats 22 are also arranged at left and right intervals. The vacuum liquid injection machine can perform liquid injection operations on multiple batteries 100 at the same time.

[0034] For details, please refer toFigure 2 As shown, the vacuum box 4 comprises a box body 41, an air pump 42 and a sealing ring 43, the metering pump 3 passes through the top wall of the box body 41, the lifter 5 is drivingly connected with the box body 41, the air pump 42 is communicated with the box body 41, and the sealing ring 43 is located at the lower end of the box body 41 and is in airtight contact with the base 1 when the vacuum box 4 is in the lowest position. When placing the battery 100, the lifting of the box body 41 is controlled by the lifter 5; and when working, the inside of the box body 41 is vacuumized and aerated by the air pump 42.

[0035] As a preferred scheme, the air pump 42 is two, and the two air pumps 42 are respectively a suction pump and a charging pump. When working, the inside of the box body 41 is first vacuumized by the suction pump, the air in the box body 41 is sucked out, and then the charging pump is used to charge nitrogen after the metering pump 3 drops liquid, so as to push the electrolyte into the inside of the battery 100. Among them, since there are water molecules in the air, therefore, sucking the air and charging the nitrogen can reduce the amount of water molecules in the inside of the battery 100, and reduce the amount of water molecules mixed into the electrolyte. In addition, since it is difficult to suck out all the water molecules in a single vacuumization, therefore, after the electrolyte is pushed into the inside of the battery 100, the vacuumization and nitrogen charging can be recycled for many times, so as to reduce the amount of water molecules to the greatest extent, and in the process of recycling, some electrolyte may be sucked back into the needle tube 2321, but when aerating again, the electrolyte will return to the inside of the battery 100.

[0036] More specifically, the lifter 5 comprises a pneumatic cylinder 51 and a lifting block 52, the piston rod of the pneumatic cylinder 51 is vertically arranged and fixedly connected with the lifting block 52, and the lifting block 52 is fixedly connected with the box body 41. When placing the battery 100, the lifting block 52 can be lifted by the pneumatic cylinder 51, so as to drive the box body 41 to lift.

[0037] As a preferred scheme, the lifter 5 is two, and the lifting blocks 52 of the two lifters 5 are respectively fixedly connected with the left end and the right end of the box body 41.

Claims

1. A battery vacuum liquid filling machine, comprising: A base, a clamp, a vacuum box, and a lifter. The clamp and the lifter are all arranged on the base. The lifter is connected to the vacuum box drive to control the lifting of the vacuum box. When the vacuum box is at the lowest position, the vacuum box is in airtight contact with the base and the vacuum box covers the clamp. The clamp includes: a bracket, a positioning seat and several liquid injection cylinders. The positioning seat and the liquid injection cylinder are both arranged on the bracket. The liquid injection cylinder is located directly above the positioning seat. It is characterized in that: the vacuum liquid injection machine also includes: several metering pumps, the metering pumps are arranged in the vacuum box and located directly above the liquid injection cylinder. The liquid injection cylinder includes: a barrel and a needle body, the needle body is located directly below the barrel and is connected to the barrel; the lower end of the needle body is provided with a needle tube and a suction cup, and the suction cup is arranged around the needle tube.

2. The battery vacuum liquid injection machine according to claim 1, characterized in that: The outer diameter of the needle body is smaller than the outer diameter of the barrel; the barrel includes: an input tube and an output tube, the output tube is located directly below the input tube and is connected to the input tube, the inner diameter and outer diameter of the output tube are respectively smaller than the inner diameter and outer diameter of the input tube, and the output tube is inserted into the needle body.

3. The battery vacuum liquid injection machine according to claim 1, characterized in that: The positioning seat includes: a seat body, several levers, several push rods and several elastic members. The levers are rotatably arranged on the seat body, and the push rods are movably arranged on the seat body up and down. The levers are pivotally connected to the push rods, and the upper and lower ends of the elastic members are respectively in contact with the push rods and the seat body.

4. The battery vacuum liquid injection machine according to claim 3, characterized in that: The upper end of the base body is provided with a plurality of positioning grooves, and the lower end of the base body is provided with a plurality of rotation grooves. The positioning grooves are connected with the rotation grooves through a sliding channel. The lever is located in the rotation groove, and the push rod passes through the sliding channel.

5. The battery vacuum liquid injection machine according to claim 4, characterized in that: The lever is provided with an air avoidance hole and a pull shaft, and the pull shaft passes through the air avoidance hole in the left and right directions; the upper end of the push rod is provided with a head, and the lower end of the push rod is provided with a pull hook, at least a part of the head is located in the positioning groove, and the pull hook is located in the air avoidance hole and engaged with the pull shaft, the head is provided with an upper abutting surface, and the sliding channel is provided with a lower abutting surface, and the upper and lower ends of the elastic member are respectively abutted against the upper abutting surface and the lower abutting surface.

6. The battery vacuum liquid injection machine according to claim 3, characterized in that: The bracket is provided with two vertically arranged strip holes, the left end and the right end of the seat body are both provided with screw holes, and the positioning seat further comprises: two fine-tuning screws, the fine-tuning screws pass through the strip holes and are screwed with the screw holes.

7. The battery vacuum liquid injection machine according to claim 1, characterized in that: The vacuum box includes: a box body and two air pumps, the metering pump passes through the top wall of the box body, the lifter is connected to the box body, and the two air pumps are respectively an air extraction pump and an air charging pump and are both connected to the box body.

8. The battery vacuum liquid injection machine according to claim 7, characterized in that: The vacuum box further comprises a sealing ring, which is located at the lower end of the box body. When the vacuum box is located at the lowest position, the sealing ring is in airtight contact with the base.

9. The battery vacuum liquid injection machine according to claim 8, characterized in that: There are two lifters, each comprising a cylinder and a lifting block. The piston rod of the cylinder is vertically arranged and fixedly connected to the lifting block. The lifting blocks of the two lifters are fixedly connected to the left and right ends of the box body respectively.

10. The battery vacuum liquid injection machine according to claim 1, characterized in that: The vacuum liquid injection machine further comprises: a set of safety gratings, wherein the safety gratings are located at the front side of the vacuum box.

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