Battery liquid injection machine

Abstract

The utility model discloses a battery liquid injection machine which is used for injecting electrolyte into a battery cavity, the battery liquid injection machine comprises a liquid injection platform, a weighing sensor, an electrolyte storage tank and a controller, the weighing sensor, the electrolyte storage tank and the controller are positioned on the liquid injection platform, and the electrolyte storage tank comprises a pipeline extending to the upper part of the battery cavity and an electromagnetic valve connected to the pipeline. And the controller is electrically connected to the electromagnetic valve so as to control opening and closing of liquid injection of the pipeline to the battery cavity. The weighing sensor is provided with a bottom plate fixedly held on the liquid injection platform, a top plate positioned above the bottom plate and a sensor main body connected between the bottom plate and the top plate, and the top plate is used for bearing a battery cavity. The sensor main body is made of corrosion-resistant precipitation-hardening stainless steel and is electrically connected to the controller, so that the weighing sensor has corrosion resistance and can be used in a seriously-corroded battery liquid injection environment; the dynamic stabilization time of the weighing sensor is less than 200 milliseconds, that is, the weighing sensor has the advantages of high precision and high dynamic sensitivity.

Description

Technical Field

[0001] The utility model relates to the technical field of battery liquid injection, in particular to a battery liquid injection machine with a weighing sensor. Background Art

[0002] When traditional battery manufacturers inject electrolyte into batteries, generally ceramic metering pumps (volumetric method) and weighing sensors (mass method) are used for liquid injection. When the liquid injection machine uses the volumetric method for liquid injection, the electrolyte is sucked into the metering pump cavity, the suction volume is measured, and it reciprocates to inject the electrolyte into the battery. However, as the battery liquid injection in the market is increasingly developing towards large-capacity batteries, and the metering pump is prone to pump jamming and blockage, resulting in low efficiency, low precision and difficult maintenance. When the liquid injection machine uses the mass method for liquid injection, before and after liquid injection, a weighing mechanism needs to be set to weigh the battery to monitor the liquid injection volume of the battery. Weighing stations are respectively set before and after battery liquid injection. There are many stations, and the batteries with unqualified weighing after liquid injection need to be rejected, and manual liquid replenishment is carried out, that is, the liquid injection volume cannot be detected during the liquid injection process, and thus the problem of unqualified liquid injection cannot be immediately found.

[0003] At the same time, the existing weighing sensors have the following disadvantages: 1. The small-range weighing sensor with precision meeting the requirements of the liquid injection machine is made of aluminum alloy, and its corrosion resistance and sealing performance are poor, resulting in it being unable to be used in the liquid injection machine. 2. The small-range stainless steel weighing sensor with corrosion resistance meeting the requirements of the liquid injection machine has poor liquid injection precision and reaction speed, resulting in it being unable to be used in the liquid injection machine.

[0004] Therefore, it is hoped to propose a new battery liquid injection machine to overcome the above defects. Content of the Utility Model

[0005] The purpose of the utility model is to provide a battery liquid injection machine with a corrosion-resistant stainless steel weighing sensor.

[0006] To achieve the above object, the utility model adopts the following technical solutions: A battery liquid injection machine is used to inject electrolyte into a battery cavity. The battery liquid injection machine includes a liquid injection platform, a weighing sensor located on the liquid injection platform, an electrolyte storage tank for injecting liquid into the battery cavity, and a controller. The electrolyte storage tank includes a pipe extending above the battery cavity and a solenoid valve connected to the pipe. The controller is electrically connected to the solenoid valve to control the opening and closing of the pipe for injecting liquid into the battery cavity. The weighing sensor is provided with a bottom plate fixed on the liquid injection platform, a top plate located above the bottom plate, and a sensor body connected between the bottom plate and the top plate. The top plate is used to carry the battery cavity. The sensor body is made of corrosion-resistant precipitation-hardened stainless steel and is electrically connected to the controller. The dynamic stability time of the weighing sensor is less than 200 milliseconds. The sensor body detects the weight change of the battery cavity on the top plate in real time, generates a signal and sends it to the controller. The controller controls the opening and closing of the solenoid valve according to the above signal to complete the injection of electrolyte into the battery cavity by the pipe.

[0007] In a preferred embodiment, the maximum range of the weighing sensor is 10 kg, and the graduation value of the weighing sensor is ±0.1 g.

[0008] In a preferred embodiment, the weighing sensor is provided with electronic components located inside the sensor body. The electronic components are electrically connected to the controller, and the outer side surface of the sensor body seals the electronic components inside the sensor body by laser welding.

[0009] In a preferred embodiment, when the battery cavity rotates onto the top plate, the sensor body detects the weight change on the top plate in real time to generate an initial signal and sends the initial signal to the controller. After receiving the initial signal, the controller controls the solenoid valve to open, so that the pipe injects liquid into the battery cavity.

[0010] In a preferred embodiment, the reading speed of the weighing sensor reaches at least 1280 times per second.

[0011] In a preferred embodiment, the controller is provided with a threshold value, which is the weight of the electrolyte injected into the battery cavity by the pipe. When the pipe injects liquid into the battery cavity, the sensor body sends the detected real-time signal to the controller. When the difference between the real-time signal and the initial signal is equal to the threshold value, the controller controls the solenoid valve to close.

[0012] In a preferred embodiment, when the controller controls the solenoid valve to close, the battery cavity is filled with electrolyte. At this time, the battery cavity rotates away from the top plate, and the next group of battery cavities rotates onto the top plate.

[0013] In a preferred embodiment, the battery filling machine includes several weighing sensors located on the filling platform. The several weighing sensors are electrically connected to the controller and can simultaneously fill the electrolytes of several battery cavities.

[0014] In a preferred embodiment, the electrolyte storage tank includes a tank body for storing electrolyte and an array of pipes extending from the tank body. The array of pipes is correspondingly arranged above the several weighing sensors to fill the battery cavities on the weighing sensors with liquid.

[0015] In a preferred embodiment, each group of pipes has at least two pipes, and each pipe is connected with a solenoid valve. The controller can control the opening and closing of one or more solenoid valves in each group of pipes, thereby controlling one or more pipes in each group of pipes to fill the battery cavity with liquid.

[0016] Compared with the prior art, the utility model has the following beneficial effects: The weighing sensor is provided with a bottom plate fixed on the filling platform, a top plate located above the bottom plate, and a sensor body connected between the bottom plate and the top plate. The top plate is used to carry the battery cavity. The sensor body is made of corrosion-resistant precipitation-hardening stainless steel and is electrically connected to the controller. The dynamic stability time of the weighing sensor is less than 200 milliseconds. The sensor body real-time detects the weight change of the battery cavity on the top plate and generates a signal and sends it to the controller. The controller controls the opening and closing of the solenoid valve according to the above signal to complete the filling of the electrolyte into the battery cavity by the pipeline. The sensor body is made of corrosion-resistant precipitation-hardening stainless steel, so that the weighing sensor has corrosion resistance and can be used in harsh battery filling environments with severe corrosion such as hydrochloric acid, sulfuric acid, and hydrofluoric acid. At the same time, the dynamic stability time of the weighing sensor is less than 200 milliseconds, that is, the weighing sensor has the advantages of high precision and high dynamic sensitivity. Description of the Drawings

[0017] Figure 1 is a three-dimensional schematic diagram of the battery filling machine in a preferred embodiment of the utility model.

[0018] Figure 2 is Figure 1 a three-dimensional schematic diagram of the battery filling machine shown in another angle. Detailed Embodiments

[0019] Please refer to Figures 1 to 2As shown in the figure, a preferred embodiment of the present utility model discloses a battery liquid injection machine 100, which is used to inject electrolyte into a battery cavity 50. The battery liquid injection machine 100 includes a liquid injection platform 10, a weighing sensor 20 located on the liquid injection platform 10, an electrolyte storage tank 30 for injecting liquid into the battery cavity 50, and a controller 40. The controller 40 is a PLC control system and is electrically connected to the weighing sensor 20 and the electrolyte storage tank 30 at the same time.

[0020] Please refer to Figure 2 As shown in the figure, the weighing sensor 20 is provided with a bottom plate 21 fixed on the liquid injection platform 10, a top plate 22 located above the bottom plate 21, and a sensor body 23 connected between the bottom plate 21 and the top plate 22. The top plate 22 is used to carry the battery cavity 50. In this embodiment, the sensor body 23 is made of corrosion-resistant precipitation-hardened stainless steel and is electrically connected to the controller 40, so that the weighing sensor 20 has corrosion resistance and can be used in harsh battery liquid injection environments with severe corrosion such as hydrochloric acid, sulfuric acid, and hydrofluoric acid. At the same time, the sensor body 23 detects the weight change of the battery cavity 50 on the top plate 22 in real time, generates a signal and sends it to the controller 40.

[0021] Furthermore, the weighing sensor 20 is provided with electronic components (not shown) inside the sensor body 23 and a corrosion-resistant cable (not shown) extending out of the sensor body 23. The electronic components are electrically connected to the controller 40 through the corrosion-resistant cable, and the outer side surface of the sensor body 23 seals the electronic components inside the sensor body 23 by laser welding, and the explosion-proof grade reaches IP69, so that the weighing sensor 20 can transmit signals while being applied to the battery liquid injection environment.

[0022] In this embodiment, the reading speed of the weighing sensor 20 reaches at least 1280 times per second, and the dynamic stability time of the weighing sensor 20 is less than 200 milliseconds, that is, the weighing sensor 20 has the advantage of high dynamic sensitivity. The maximum range of the weighing sensor 20 is 10 kg, and the graduation value of the weighing sensor 20 is ±0.1 g, that is, the weighing sensor has the advantage of high precision. At the same time, the weighing sensor 20 can be applied to the battery liquid injection environment of medium and large-sized batteries such as blade batteries.

[0023] The electrolyte storage tank 30 includes a pipeline 32 extending above the battery cavity 50 and a solenoid valve 33 connected to the pipeline 32. The controller 40 is electrically connected to the solenoid valve 33 and controls the opening and closing of the solenoid valve 33 according to the signal sent by the above-mentioned sensor body 23, so as to control the opening and closing of the pipeline 32 for injecting liquid into the battery cavity 50, and further realize the injection of electrolyte into the battery cavity 50 through the pipeline 32. Combined with Figure 1As shown in the figure, the battery liquid injection machine 100 includes several weighing sensors 20 located on the liquid injection platform 10. The several weighing sensors 20 are all electrically connected to the controller 40 and can simultaneously inject electrolyte into several battery cavities 50.

[0024] The electrolyte storage tank 30 includes a tank body 31 for storing electrolyte and an array of pipes 32 extending from the tank body 31. The array of pipes 32 is correspondingly arranged above the several weighing sensors 20 to inject liquid into the battery cavities 50 on the weighing sensors 20. Each group of pipes 32 has at least two pipes 32, and an electromagnetic valve 33 is connected to each pipe 32. The controller 40 can control the opening and closing of one or more electromagnetic valves 33 in each group of pipes 32, and further control one or more pipes 32 in each group of pipes 32 to inject liquid into the battery cavity 50.

[0025] The working principle of the battery liquid injection machine 100 is as follows: When a group of battery cavities 50 rotates onto the top plate 22, the sensor body 23 detects the weight change on the top plate 22 in real time to generate an initial signal and sends the initial signal to the controller 40. After receiving the initial signal, the controller 40 controls the electromagnetic valve 33 to open, so that the pipe 32 injects liquid into the battery cavity 50. The controller 40 is provided with a threshold value, which is the weight of the electrolyte injected into the battery cavity 50 by the pipe 32. When the pipe 32 injects liquid into the battery cavity 50, the sensor body 23 sends the detected real-time signal to the controller 40, and when the difference between the real-time signal and the initial signal is equal to the threshold value, the controller 40 controls the electromagnetic valve 33 to close. When the controller 40 controls the electromagnetic valve 33 to close, this group of battery cavities 50 has completed the injection of electrolyte. At this time, this group of battery cavities 50 rotates away from the top plate 22, and the next group of battery cavities 50 rotates onto the top plate 22 to start the next cycle of electrolyte injection.

[0026] In the present utility model, the sensor body 23 is made of corrosion-resistant precipitation-hardening stainless steel and is electrically connected to the controller 40. The dynamic stability time of the weighing sensor 20 is less than 200 milliseconds. The sensor body 23 detects the weight change of the battery cavity 50 on the top plate 22 in real time, generates a signal and sends it to the controller 40. The controller 40 controls the opening and closing of the electromagnetic valve 33 according to the above signal to complete the injection of electrolyte into the battery cavity 50 by the pipe 32. The sensor body 23 is made of corrosion-resistant precipitation-hardening stainless steel, so that the weighing sensor 20 has corrosion resistance and can be used in harsh battery liquid injection environments with severe corrosion such as hydrochloric acid, sulfuric acid, and hydrofluoric acid. At the same time, the dynamic stability time of the weighing sensor 20 is less than 200 milliseconds, that is, the weighing sensor 20 has the advantages of high precision and high dynamic sensitivity.

[0027] In summary, the above are only the preferred embodiments of the present utility model, and the scope of the present utility model should not be limited thereby. That is, all simple equivalent changes and modifications made according to the claims and the content of the specification of the present utility model should still fall within the scope covered by the patent of the present utility model.

Claims

1. A battery liquid injection machine, used for injecting electrolyte into a battery cavity, the battery liquid injection machine comprises a liquid injection platform, a weighing sensor located on the liquid injection platform, an electrolyte storage tank for injecting liquid into the battery cavity, and a controller, the electrolyte storage tank comprises a pipeline extending to the top of the battery cavity and a solenoid valve connected to the pipeline, the controller is electrically connected to the solenoid valve to control the opening and closing of the pipeline for injecting liquid into the battery cavity; characterized in that: The weighing sensor is provided with a bottom plate fixed on the injection platform, a top plate located above the bottom plate and a sensor body connected between the bottom plate and the top plate, the top plate is used to support the battery cavity, the sensor body is made of corrosion-resistant precipitation-hardened stainless steel and is electrically connected to the controller, the dynamic stabilization time of the weighing sensor is less than 200 milliseconds, the sensor body detects the weight change of the battery cavity on the top plate in real time and generates a signal and sends it to the controller, the controller controls the switch of the solenoid valve according to the above signal to complete the injection of electrolyte into the battery cavity by the pipeline.

2. The battery filling machine according to claim 1, characterized in that: The maximum measuring range of the weighing sensor is 10 kg, and the graduation value of the weighing sensor is ±0.1 g.

3. The battery filling machine according to claim 1, characterized in that: The weighing sensor is provided with an electronic component located in the sensor body, the electronic component is electrically connected to the controller, and the electronic component is sealed in the sensor body by laser welding on the outer side of the sensor body.

4. The battery filling machine according to claim 1, characterized in that: When the battery cavity moves to the top plate, the sensor body detects the weight change on the top plate in real time to generate an initial signal and sends the initial signal to the controller. After receiving the initial signal, the controller controls the solenoid valve to open so that the pipeline injects liquid into the battery cavity.

5. The battery liquid filling machine according to claim 4, characterized in that: The weighing sensor has a reading speed of at least 1280 times per second.

6. The battery liquid filling machine according to claim 4, characterized in that: The controller is provided with a threshold value, which is the weight of the electrolyte injected into the battery cavity by the pipeline; when the pipeline injects liquid into the battery cavity, the sensor body sends the detected real-time signal to the controller, and when the difference between the real-time signal and the initial signal is equal to the threshold value, the controller controls the solenoid valve to close.

7. The battery liquid filling machine according to claim 6, characterized in that: When the controller controls the electromagnetic valve to close, the battery cavity completes the injection of electrolyte, at which time the battery cavity rotates away from the top plate, and the next group of battery cavities moves to the top plate.

8. The battery liquid filling machine according to claim 1, characterized in that: The battery filling machine comprises a plurality of weighing sensors located on the filling platform. The plurality of weighing sensors are electrically connected to the controller and can simultaneously fill electrolyte into a plurality of battery cavities.

9. The battery liquid filling machine according to claim 8, characterized in that: The electrolyte storage tank includes a tank body for storing electrolyte and an array of pipes extending from the tank body. The array of pipes is correspondingly arranged above a plurality of weighing sensors to inject liquid into the battery cavity on the weighing sensor.

10. The battery liquid filling machine according to claim 9, characterized in that: Each group of the pipelines has at least two pipelines, each of which is connected to the solenoid valve. The controller can control the switching of one or more solenoid valves in each group of the pipelines, thereby controlling one or more pipelines in each group of the pipelines to inject liquid into the battery cavity.

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