Battery formation negative pressure and liquid injection integrated device
By integrating the electrolyte injection process into the negative pressure formation process, the negative pressure formation and electrolyte replenishment are unified, solving the problems of complex production processes and large equipment space occupation in the existing technology, improving battery production efficiency and reducing costs.
Patent Information
- Application Number
- CN202520129572.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-20
- Publication Date
- 2026-01-09
- Estimated Expiration
- 2035-01-20
AI Technical Summary
In existing battery manufacturing processes, negative pressure formation and electrolyte replenishment need to be carried out separately, resulting in complex production processes, large equipment footprint, low efficiency, and high costs.
Design a battery formation negative pressure and electrolyte injection integrated device, which integrates the electrolyte injection process into the negative pressure formation process. The integrated syringe and negative pressure cup realize the unification of negative pressure formation and electrolyte replenishment, and the piston rod driven by the driver completes the delivery and replenishment of electrolyte.
It simplifies the production process, reduces the space occupied by equipment, improves production efficiency, and reduces production costs.
Smart Images
Figure CN223785294U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of battery manufacturing technology, and in particular to an integrated device for battery formation negative pressure and liquid injection. Background Technology
[0002] In the battery manufacturing process, formation is a crucial step that determines battery performance. After electrolyte injection and high-temperature static immersion, formation involves a chemical reaction inside the battery. A negative pressure device with a cup and nozzle is used to draw and collect gases. However, the gases drawn in by the negative pressure may contain electrolyte, leading to a reduction in the amount of electrolyte inside the battery. When the total amount of electrolyte is insufficient, it directly affects the battery's electrical and cycle performance. Currently, to replenish the lost electrolyte, the battery needs to be moved to a different location for replenishment. Negative pressure formation and electrolyte replenishment must be performed separately, resulting in numerous battery processing equipment, large space requirements, complex production processes, low production efficiency, and high production costs. Utility Model Content
[0003] The main purpose of this invention is to propose an integrated device for battery formation negative pressure and liquid injection, which aims to integrate the liquid injection process into the negative pressure formation process, simplify the production process, reduce site occupation, improve production efficiency, and reduce production costs.
[0004] To achieve the above objectives, the present invention proposes a battery formation negative pressure and liquid injection integrated device, comprising:
[0005] Mounting bracket;
[0006] A negative pressure cup is fixedly installed on the mounting bracket, and the negative pressure cup has a liquid injection port and a negative pressure port;
[0007] A syringe includes an injection cup, a piston rod, and a sealing piston. The injection cup is fixedly mounted on the mounting bracket. The injection cup has a liquid storage chamber. The sealing piston is sleeved on the piston rod and can seal the liquid storage chamber. The liquid storage chamber is connected to an inlet port and an outlet port. The inlet port is used to introduce electrolyte into the liquid storage chamber, and the outlet port is connected to the injection port.
[0008] An actuator, mounted on the mounting bracket, drives the piston rod, thereby movably positioning the piston rod within the liquid reservoir and moving the sealed piston.
[0009] Preferably, there are multiple syringes and multiple negative pressure cups.
[0010] Preferably, the injection port of each syringe is connected to a manifold, which is used to connect an external power pump and a reservoir containing electrolyte.
[0011] Preferably, the mounting bracket is equipped with a plurality of first one-way valves and a plurality of second one-way valves. The first one-way valves are used to control the opening and closing of the passage between the liquid inlet and the manifold, and each of the second one-way valves is used to control the opening and closing of the passage between the liquid outlet and the liquid injection port.
[0012] Preferably, each of the negative pressure cups has a negative pressure port connected to a manifold, which is used to connect to an external negative pressure device.
[0013] Preferably, the sealing piston has a recessed groove, and the bottom of the piston rod has a hook portion that engages with the groove.
[0014] Preferably, the actuator is an electric cylinder.
[0015] Preferably, the drive end of the electric cylinder is connected to a mounting plate, and the mounting plate is fixedly connected to each of the piston rods.
[0016] Preferably, there are two electric cylinders, which are respectively installed on both sides of the mounting bracket, and the drive ends of the two electric cylinders are respectively connected to both ends of the mounting plate.
[0017] Preferably, the mounting bracket is connected to the mounting plate by a telescopic rod assembly.
[0018] Compared with the prior art, the present invention integrates the syringe into the traditional negative pressure formation device, and integrates the negative pressure function and the liquid injection function into the same process. It can realize the function of negative pressure formation and replenishing electrolyte to the battery. There is no need to move the battery position to replenish electrolyte when the electrolyte is reduced. It simplifies the entire production process, has a high degree of integration, small size, reduces space occupation, improves production efficiency, and reduces production costs. Attached Figure Description
[0019] Figure 1 This is a schematic diagram of the integrated battery formation negative pressure and liquid injection device of this utility model;
[0020] Figure 2 This is a schematic diagram of the integrated battery formation negative pressure and liquid injection device of this utility model from another perspective.
[0021] Figure 3 This is a schematic diagram of the electric cylinder and syringe in the battery formation negative pressure and liquid injection integrated device of this utility model;
[0022] Figure 4 This is a schematic diagram of the mounting bracket in the battery formation negative pressure and liquid injection integrated device of this utility model;
[0023] Figure 5This is a cross-sectional view of the syringe in the battery formation negative pressure and liquid injection integrated device of this utility model;
[0024] Figure 6 This is a schematic diagram of the negative pressure cup in the battery formation negative pressure and liquid injection integrated device of this utility model.
[0025] Reference numerals: 100, Mounting bracket; 200, Negative pressure cup; 210, Injection port; 220, Negative pressure port; 300, Syringe; 310, Injection cup body; 320, Piston rod; 330, Sealing piston; 311, Liquid storage chamber; 312, Inlet port; 313, Outlet port; 400, Actuator; 510, First check valve; 520, Second check valve; 610, Manifold; 620, Manifold rod; 331, Hook groove; 321, Hook part; 700, Mounting plate; 800, Telescopic rod assembly. Detailed Implementation
[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0027] Please see Figures 1 to 6 This utility model proposes an integrated device for battery formation negative pressure and liquid injection, which can be installed in the battery test needle bed and integrates negative pressure formation and liquid injection.
[0028] The battery formation negative pressure and liquid injection integrated device includes a mounting bracket 100, a negative pressure cup 200, a syringe 300, and a driver 400. The negative pressure cup 200 is fixedly mounted on the mounting bracket 100 and has a liquid injection port 210 and a negative pressure port 220. The syringe 300 includes an injection cup body 310, a piston rod 320, and a sealing piston 330. The injection cup body 310 is fixedly mounted on the mounting bracket 100 and has a liquid storage chamber 311 inside. The plug 330 is sleeved on the piston rod 320, and the sealing piston 330 can seal the liquid storage chamber 311. The liquid storage chamber 311 is connected to the liquid inlet 312 and the liquid outlet 313. The liquid inlet 312 is used to introduce electrolyte into the liquid storage chamber 311, and the liquid outlet 313 is connected to the liquid injection port 210. The driver 400 is mounted on the mounting bracket 100. The driver 400 drives the piston rod 320, so that the piston rod 320 is movably disposed in the liquid storage chamber 311 and drives the sealing piston 330 to move.
[0029] Specifically, the bottom of the negative pressure cup 200 is connected to the battery's electrolyte inlet via a suction nozzle. The negative pressure cup 200 is connected to an external negative pressure device via a manifold 620 for negative pressure formation of the battery. The electrolyte reservoir 311 is a closed space used to hold the electrolyte. The piston rod 320 is driven by the actuator 400 to move, causing it to reciprocate up and down, which in turn moves the sealed piston 330 on the piston rod 320, completing the action of electrolyte entering and exiting the injection cup 310. When electrolyte needs to be added to the injection cup, the actuator 400 drives the piston rod 320 upward, increasing the volume of the reservoir 311, allowing electrolyte to be injected into the injection cup 310 from the outside. When electrolyte needs to be injected from the injection cup 310 into the negative pressure cup 200, the actuator 400 drives the piston rod 320 downward, pressing down to inject electrolyte into the negative pressure cup 200. This configuration integrates the syringe 300 into the traditional negative pressure formation device, combining the negative pressure function and the electrolyte injection function into the same process. It achieves both negative pressure formation and electrolyte replenishment for the battery, eliminating the need to relocate the battery to replenish electrolyte when it is low. This simplifies the entire production process, resulting in high integration, small size, reduced space occupation, improved production efficiency, and lower production costs.
[0030] Please see Figures 1 to 2 Preferably, there are multiple syringes 300 and negative pressure cups 200. This allows for simultaneous negative pressure formation of multiple batteries and also provides electrolyte replenishment, thus improving battery production efficiency.
[0031] Please see Figures 1 to 2 Preferably, the injection port 210 of each syringe 300 is connected to a manifold 610, which connects to an external power pump and a reservoir containing electrolyte. Thus, the power pump provides power for the delivery of electrolyte. When electrolyte needs to be added to the manifold 610 and then to the syringe 300, the electrolyte is delivered from the reservoir to the manifold 610 via the power pump, and then distributed from the manifold 610 to each syringe 300.
[0032] Please see Figures 1 to 2Preferably, the mounting bracket 100 is equipped with multiple first one-way valves 510 and multiple second one-way valves 520. The first one-way valves 510 control the opening and closing of the passage between the inlet port 312 and the manifold 610, and the second one-way valves 520 control the opening and closing of the passage between the outlet port 313 and the injection port 210. Specifically, the number of first one-way valves 510, second one-way valves 520, syringes 300, and negative pressure cups 200 are the same. With this configuration, when the electrolyte in the syringe 300 is insufficient and needs to be replenished, the first one-way valve 510 is opened and the second one-way valve 520 is closed. Power is provided by the power pump to transport the electrolyte in the storage tank through the manifold 610 and the first one-way valves 510 to the storage chamber 311 of the injection cup 310. When electrolyte needs to be pumped into the negative pressure cup 200, the second one-way valve 520 is opened and the first one-way valve 510 is closed. By operating the actuator 400, the piston rod 320 is pressed down to pump the electrolyte through the second one-way valve 520 into the negative pressure cup 200. Then the negative pressure cup 200 can replenish the electrolyte into the battery.
[0033] Please see Figures 1 to 2 Preferably, each negative pressure cup 200 has a negative pressure port 220 connected to a manifold 620, which is used to connect to an external negative pressure device. When the negative pressure device operates, it can generate negative pressure to draw out the gas in the battery. At this time, the first one-way valve 510 and the second one-way valve 520 can both be in the closed state.
[0034] Please see Figure 5 The sealing piston 330 can be connected to the piston rod 320 in various ways, as long as the piston rod 320 moves to a position where the sealing piston 330 can move accordingly. Preferably, the sealing piston 330 has a recessed groove 331, and the bottom of the piston rod 320 has a hook portion 321 that engages with the groove 331. Alternatively, the sealing piston 330 can be sleeved on the bottom of the piston rod 320; or the sealing piston 330 can be fixed to the piston rod 320 by means of adhesive screws, etc.; as long as the connection stability between the piston rod 320 and the sealing piston 330 is ensured.
[0035] Preferably, the actuator 400 is an electric cylinder. By using an electric cylinder, the high control precision of the driving end of the electric cylinder can be utilized to achieve precise metering of electrolyte into the negative pressure cup 200 by the syringe 300, thereby realizing quantitative electrolyte replenishment and improving battery production quality.
[0036] Please see Figure 1 and Figure 3Preferably, the drive end of the electric cylinder is connected to a mounting plate 700, which is fixedly connected to each piston rod 320. The mounting plate 700 can be integrally formed and fixed to the piston rod 320, or the piston rod 320 can be fixed to the mounting plate 700 by screws or other means. In this way, the electric cylinder only needs to drive the movement of one mounting plate 700 to synchronously drive all piston rods 320 to move, thereby driving the sealing piston 330 to move, realizing the synchronous injection of electrolyte into the negative pressure cup 200 or the delivery of external electrolyte into the manifold 610 to the injection cup 310, maximizing the utilization of kinetic energy and saving costs.
[0037] Please see Figure 1 and Figure 3 Preferably, there are two electric cylinders, which are respectively installed on both sides of the mounting bracket 100, and the drive ends of the two electric cylinders are respectively connected to both ends of the mounting plate 700. The two electric cylinders drive the mounting plate 700 to move the piston rod 320, ensuring the synchronicity of the movement of both sides of the mounting plate 700, maintaining the coordinated and balanced movement of the mounting plate 700, and ensuring precise control of the movement of each piston rod 320.
[0038] Please see Figure 4 Preferably, the mounting bracket 100 is connected to the mounting plate 700 by a telescopic rod assembly 800. The telescopic rod assembly 800 can guide the up-and-down reciprocating movement of the mounting plate 700, prevent the mounting plate 700 from deviating from its position, and ensure the smooth movement of the piston rod 320 driven by the mounting plate 700, thereby realizing the inlet and outlet of liquid in the liquid storage chamber 311 of the injection cup 310 in the syringe 300.
[0039] The above are merely optional embodiments of this utility model and do not limit the patent scope of this utility model. All equivalent structural transformations made based on the contents of this utility model specification and drawings under the utility model concept, or direct / indirect applications in other related technical fields, are included within the patent protection scope of this utility model.
Claims
1. A battery formation negative pressure and electrolyte injection integrated device, characterized in that, include: Mounting bracket; A negative pressure cup is fixedly installed on the mounting bracket, and the negative pressure cup has a liquid injection port and a negative pressure port; A syringe includes an injection cup, a piston rod, and a sealing piston. The injection cup is fixedly mounted on the mounting bracket. The injection cup has a liquid storage chamber. The sealing piston is sleeved on the piston rod and can seal the liquid storage chamber. The liquid storage chamber is connected to an inlet port and an outlet port. The inlet port is used to introduce electrolyte into the liquid storage chamber, and the outlet port is connected to the injection port. An actuator, mounted on the mounting bracket, drives the piston rod, thereby movably positioning the piston rod within the liquid reservoir and moving the sealed piston.
2. The integrated battery formation negative pressure and electrolyte injection device as described in claim 1, characterized in that, The number of syringes and negative pressure cups are both multiple.
3. The battery formation negative pressure and liquid injection integrated device as described in claim 2, characterized in that, Each syringe has an injection port connected to a manifold that connects to an external power pump and a reservoir containing electrolyte.
4. The battery formation negative pressure and liquid injection integrated device as described in claim 3, characterized in that, The mounting bracket is equipped with a plurality of first one-way valves and a plurality of second one-way valves. The first one-way valves are used to control the opening and closing of the passage between the liquid inlet and the manifold, and the second one-way valves are used to control the opening and closing of the passage between the liquid outlet and the liquid injection port.
5. The battery formation negative pressure and electrolyte injection integrated device as described in claim 3, characterized in that, Each of the negative pressure cups has a negative pressure port connected to a manifold, which is used to connect to an external negative pressure device.
6. The battery formation negative pressure and electrolyte injection integrated device as described in claim 1, characterized in that, The sealing piston has a recessed groove, and the bottom of the piston rod is provided with a hook part, which engages in the groove.
7. The battery formation negative pressure and electrolyte injection integrated device as described in claim 1, characterized in that, The actuator is an electric cylinder.
8. The battery formation negative pressure and electrolyte injection integrated device as described in claim 7, characterized in that, The drive end of the electric cylinder is connected to a mounting plate, and the mounting plate is fixedly connected to each of the piston rods.
9. The battery formation negative pressure and electrolyte injection integrated device as described in claim 8, characterized in that, The number of electric cylinders is two, and the two electric cylinders are respectively installed on both sides of the mounting bracket, and the driving ends of the two electric cylinders are respectively connected to the two ends of the mounting plate.
10. The battery formation negative pressure and electrolyte injection integrated device as described in any one of claims 8 to 9, characterized in that, The mounting bracket is connected to the mounting plate by a telescopic rod assembly.