Battery formation liquid injection device and battery formation liquid injection all-in-one machine
By integrating negative pressure formation and secondary electrolyte injection processes, and using negative pressure cups and two-way valves to control electrolyte flow, the problems of large equipment footprint and low efficiency in lithium battery production have been solved, enabling quantitative replenishment of electrolyte and improving production efficiency.
Patent Information
- Application Number
- CN202520129574.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-20
- Publication Date
- 2026-01-13
- Estimated Expiration
- 2035-01-20
AI Technical Summary
In lithium battery production, the negative pressure formation process and the secondary electrolyte injection process are carried out separately, resulting in large factory space occupied by production equipment and low efficiency.
The negative pressure formation process and the secondary electrolyte injection process are integrated into the same equipment. The electrolyte flow rate is controlled by a negative pressure cup and a two-way valve to achieve quantitative replenishment of the electrolyte.
It reduces the area occupied by equipment, improves production efficiency, ensures the quantitative replenishment of electrolyte, and enhances the quality of battery production.
Smart Images
Figure CN223797518U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of battery production technology, and in particular to a battery formation liquid injection device and an integrated battery formation liquid injection machine. Background Technology
[0002] The manufacturing process of lithium batteries requires liquid injection and formation processes. In the traditional process, liquid is injected into each battery one by one through the injection port, and a second liquid injection, or replenishment, is performed after formation.
[0003] Currently, in lithium battery production lines, the negative pressure formation process and the secondary liquid injection process are carried out separately in different equipment and areas via logistics lines, which greatly occupies the production plant area, and the equipment logistics lines are huge, time-consuming, labor-intensive, and have low production efficiency. Utility Model Content
[0004] The main purpose of this utility model is to propose a battery formation electrolyte injection device and an integrated battery formation electrolyte injection machine, which aims to integrate the electrolyte replenishment process into the negative pressure formation process, quantitatively replenish electrolyte to the battery injection port, reduce the factory floor space occupied, and improve production efficiency.
[0005] To achieve the above objectives, the present invention provides a battery formation electrolyte injection device, comprising:
[0006] Mounting bracket;
[0007] A negative pressure cup assembly includes a manifold and multiple negative pressure cups. The multiple negative pressure cups and the manifold are all disposed on the mounting bracket. Each negative pressure cup has an injection port and a negative pressure port. Each negative pressure port is connected to the manifold.
[0008] The electrolyte injection assembly includes a manifold and multiple two-way valves, both mounted on the mounting bracket. The manifold is used to allow electrolyte to flow through it. Each two-way valve has an inlet and an outlet. Each inlet is connected to the manifold, and the inlets and outlets are connected in a one-to-one correspondence. Each two-way valve controls the flow rate of electrolyte into the corresponding negative pressure cup.
[0009] Preferably, the manifold is provided with multiple branch ports, and the multiple branch ports are connected to the multiple negative pressure interfaces one by one.
[0010] Preferably, the manifold is provided with multiple branch ports, and the multiple branch ports are connected to the multiple liquid inlet ports one by one.
[0011] Preferably, the manifold is arranged in a long strip shape.
[0012] Preferably, each of the manifolds is connected to a support rod at both ends, and the two support rods are connected to the mounting bracket. The support rods are used to support the manifolds.
[0013] Preferably, each of the manifolds is equipped with a manifold bracket on both sides, and the manifold bracket is mounted on the mounting bracket.
[0014] Preferably, a mounting plate is provided between two adjacent support rods, and each mounting plate is used to install multiple two-way valves.
[0015] Preferably, the mounting bracket is welded from multiple square tubes.
[0016] This utility model also proposes a battery formation and liquid injection integrated machine, which includes a needle bed body and a battery formation and liquid injection device. The battery formation and liquid injection device is installed on the needle bed body and includes:
[0017] Mounting bracket;
[0018] A negative pressure cup assembly includes a manifold and multiple negative pressure cups. The multiple negative pressure cups and the manifold are all disposed on the mounting bracket. Each negative pressure cup has an injection port and a negative pressure port. Each negative pressure port is connected to the manifold.
[0019] The electrolyte injection assembly includes a manifold and multiple two-way valves, both mounted on the mounting bracket. The manifold is used to allow electrolyte to flow through it. Each two-way valve has an inlet and an outlet. Each inlet is connected to the manifold, and the inlets and outlets are connected in a one-to-one correspondence. Each two-way valve controls the flow rate of electrolyte into the corresponding negative pressure cup.
[0020] Compared with existing technologies, the negative pressure cup of this utility model's battery formation and electrolyte injection device has one negative pressure interface connected to the negative pressure control system to complete the formation process, and the other interface connected to the electrolyte injection component to complete the electrolyte injection function. This integrates the electrolyte injection function into the formation process, eliminating the need to transport electrolyte to the formation and injection processes in different areas via logistics lines, thus reducing waste of manpower and resources. Furthermore, each two-way valve individually controls the flow rate of electrolyte entering the negative pressure cup, ensuring the accuracy of electrolyte replenishment at the battery injection port. This guarantees that electrolyte is quantitatively replenished into the negative pressure cup, and consequently, into the battery, ensuring battery production quality and improving production efficiency. Attached Figure Description
[0021] Figure 1This is a schematic diagram of the battery formation liquid injection device of this utility model;
[0022] Figure 2 This is a schematic diagram of the battery formation and liquid injection device of this utility model from another perspective;
[0023] Figure 3 This is a schematic diagram of the liquid injection component in the battery formation liquid injection device of this utility model;
[0024] Figure 4 This is a schematic diagram of the liquid injection component in the battery formation liquid injection device of this utility model from another perspective;
[0025] Figure 5 This is a schematic diagram of the negative pressure cup in the battery formation liquid injection device of this utility model;
[0026] Figure 6 This is a schematic diagram of the manifold structure in the battery formation and liquid injection device of this utility model.
[0027] Explanation of reference numerals: 100, mounting bracket; 200, manifold rod; 300, negative pressure cup; 310, liquid injection port; 320, negative pressure port; 400, manifold tube; 500, two-way valve; 510, liquid inlet port; 520, liquid outlet port; 210, branch port; 410, diversion port; 600, support rod; 220, manifold rod bracket; 700, mounting plate. Detailed Implementation
[0028] 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.
[0029] Please see Figures 1 to 6 This utility model proposes a battery formation liquid injection device that can be installed in a battery formation liquid injection integrated machine. It has both negative pressure formation function and liquid injection function.
[0030] The battery formation electrolyte injection device includes a mounting bracket 100, a negative pressure cup assembly, and an injection assembly. The negative pressure cup assembly includes a manifold 200 and multiple negative pressure cups 300. The multiple negative pressure cups 300 and the manifold 200 are all mounted on the mounting bracket 100. Each negative pressure cup 300 has an injection port 310 and a negative pressure port 320, and each negative pressure port 320 is connected to the manifold 200. The injection assembly includes a manifold 400 and multiple two-way valves 500. All valves 500 are mounted on the mounting bracket 100. The inside of the manifold 400 is used to introduce electrolyte. Each two-way valve 500 has an inlet port 510 and an outlet port 520. Each inlet port 510 is connected to the manifold 400. Multiple inlet ports 510 are connected to multiple injection ports 310 in a one-to-one correspondence. Multiple outlet ports 520 are connected to multiple injection ports 310 in a one-to-one correspondence. Each two-way valve 500 is used to control the flow rate of electrolyte flowing into the corresponding negative pressure cup 300.
[0031] Specifically, this device is a battery formation electrolyte filling device. A formation suction nozzle is connected to the bottom of the negative pressure cup 300, which is connected to the battery electrolyte filling port. The negative pressure interface 320 of the negative pressure cup 300 can be connected to an external negative pressure device via the manifold 200. The negative pressure device generates negative pressure to draw in gas from inside the battery. However, the gas drawn in by the negative pressure may contain electrolyte, leading to a reduction in the electrolyte inside the battery. At this time, since the electrolyte filling interface 310 on the negative pressure cup 300 is connected to a two-way valve 500, controlling the two-way valve 500 to open allows the electrolyte in the manifold 400 to flow through the two-way valve 500 into the negative pressure cup 300 and then into the battery electrolyte filling port. When the electrolyte is replenished to a suitable level in the battery, the two-way valve 500 is closed to block the flow of electrolyte into the battery electrolyte filling port, achieving quantitative replenishment of electrolyte into the battery electrolyte filling port, completing the secondary replenishment of battery electrolyte. With this configuration, one negative pressure interface 320 of the negative pressure cup 300 of the battery formation and electrolyte injection device of this utility model is connected to the negative pressure control system to complete the formation process, and the other interface 310 is connected to the electrolyte injection component to complete the electrolyte injection function. The electrolyte injection function is integrated into the formation process, eliminating the need to transport electrolyte to the formation and injection processes in different areas via logistics lines, thus reducing waste of manpower and resources. Furthermore, each two-way valve 500 individually controls the flow rate of electrolyte entering the negative pressure cup 300. By controlling the accuracy of electrolyte replenishment at the battery injection port through the two-way valve 500, it ensures that electrolyte can be quantitatively replenished into the negative pressure cup 300, thereby quantitatively replenishing electrolyte into the battery, ensuring battery production quality, and improving production efficiency.
[0032] Please see Figure 3 and Figure 6Preferably, the manifold 200 is provided with multiple branch ports 210, and the multiple branch ports 210 are connected to multiple negative pressure interfaces 320 in a one-to-one correspondence. Each manifold 200 is connected to the negative pressure interface 320 of the negative pressure cup 300 through the branch port 210, so that the manifold 200 can be connected to each negative pressure cup 300.
[0033] Please see Figures 1 to 4 Preferably, the manifold 400 is provided with multiple branch ports 410, each corresponding to a different liquid inlet 510. Each manifold 400 is connected to the liquid inlet 510 of a two-way valve 500 via a branch port 410, allowing the manifold 400 to connect to each two-way valve 500. The branch ports 410 of the manifold 400 are arranged sequentially at the liquid inlet 510 of each two-way valve 500, reducing the number of piping paths from the manifold 400 to the two-way valve 500. The manifold 400 should be as parallel to the ground as possible to ensure that it is parallel at each branch port 410, preventing situations where the left side is higher than the right or vice versa, and ensuring that the electrolyte level is higher than each branch port 410.
[0034] Please see Figures 1 to 4 Preferably, the manifold 400 is elongated. The manifold 400 spans above each two-way valve 500, and each branch port 410 on the manifold 400 can be directly opposite the inlet port 510 of the two-way valve 500, facilitating the flow of electrolyte into the inlet port 510 of the two-way valve 500. The electrolyte inlet of the manifold 400 can be located at either end or at the top of the manifold 400.
[0035] Please see Figures 3 to 4 Preferably, each manifold 400 has a support rod 600 connected to both ends, and the two support rods 600 are connected to the mounting bracket 100. The support rods 600 are used to support the manifold 400. The support rods 600 support the manifold 400 above each two-way valve 500, which facilitates the flow of electrolyte from top to bottom to the two-way valve 500 and saves space.
[0036] Please see Figures 1 to 4 Preferably, each busbar 200 is equipped with a busbar bracket 220 on both sides, and the busbar bracket 220 is mounted on the mounting bracket 100. The busbar 200 can be fixedly mounted on the busbar bracket 220 by bolts or other fasteners.
[0037] Please see Figures 1 to 4Preferably, a mounting plate 700 is provided between two adjacent support rods 600, and each mounting plate 700 is used to install multiple two-way valves 500. The multiple two-way valves 500 are arranged correspondingly with multiple negative pressure cups 300 and are connected one-to-one from top to bottom.
[0038] Please see Figures 1 to 2 Preferably, the mounting bracket 100 is constructed by welding together multiple square tubes.
[0039] This utility model also proposes a battery formation and liquid injection integrated machine, which includes a needle bed body and a battery formation and liquid injection device, the latter being mounted on the needle bed body. The needle bed body includes an upper probe mechanism, a battery tray, a lower probe mechanism, an upper drive module, and a lower drive module. The upper drive module drives and connects to the upper probe mechanism, and the lower drive module drives and connects to the lower probe mechanism. Through the movement of the upper and lower probe mechanisms, the battery terminals on the battery tray are aligned, enabling battery charging and discharging. The specific structure of the battery formation and liquid injection device is as described in the above embodiments. Since this battery formation and liquid injection integrated machine includes a battery formation and liquid injection device, and the battery formation and liquid injection device adopts all the technical solutions of all the above embodiments, it possesses at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be elaborated further here.
[0040] 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 electrolyte injection device, characterized in that, The battery formation electrolyte injection device includes: Mounting bracket; A negative pressure cup assembly includes a manifold and multiple negative pressure cups. The multiple negative pressure cups and the manifold are all disposed on the mounting bracket. Each negative pressure cup has an injection port and a negative pressure port. Each negative pressure port is connected to the manifold. The electrolyte injection assembly includes a manifold and multiple two-way valves, both mounted on the mounting bracket. The manifold is used to allow electrolyte to flow through it. Each two-way valve has an inlet and an outlet. Each inlet is connected to the manifold, and the inlets and outlets are connected in a one-to-one correspondence. Each two-way valve controls the flow rate of electrolyte into the corresponding negative pressure cup.
2. The battery formation and electrolyte injection device as described in claim 1, characterized in that, The manifold is provided with multiple branch ports, and each of the multiple branch ports is connected to a corresponding negative pressure interface.
3. The battery formation and electrolyte injection device as described in claim 1, characterized in that, The manifold is provided with multiple branch ports, and each of the multiple branch ports is connected to a corresponding liquid inlet port.
4. The battery formation and electrolyte injection device as described in claim 1, characterized in that, The manifold is arranged in a long strip shape.
5. The battery formation and electrolyte injection device as described in claim 1, characterized in that, Each of the manifolds is connected to two support rods at both ends, and the two support rods are connected to the mounting bracket. The support rods are used to support the manifolds.
6. The battery formation electrolyte injection device as described in claim 1, characterized in that, Each of the manifolds has a manifold bracket installed on both sides, and the manifold bracket is mounted on the mounting bracket.
7. The battery formation electrolyte injection device as described in claim 5, characterized in that, An mounting plate is provided between two adjacent support rods, and each mounting plate is used to install multiple two-way valves.
8. The battery formation and electrolyte injection device as described in claim 1, characterized in that, The mounting bracket is made of multiple square tubes welded together.
9. A battery formation and electrolyte injection integrated machine, characterized in that, It includes a needle bed body and a battery formation injection device as described in any one of claims 1 to 8, wherein the battery formation injection device is mounted on the needle bed body.