Device for detecting withstand voltage damage of lead-acid storage battery shell

Abstract

The invention relates to the technical field of lead-acid storage battery production safety, in particular to battery shell pressure-resistant damage detection equipment which comprises a frame, a detection box body, a water tank, a plunger pump, an energy storage tank and an air pressure pipe, a plurality of side plates are embedded outside the frame, and the side plates are respectively combined into a detection area, a control area and a supply area; the water tank body is arranged in a supply area, a bottom plate is arranged below the supply area, the water tank body is arranged above the bottom plate, at least two injection ports are formed in one side of the water tank body, one of the two injection ports is connected with a pressure relief valve, and the other injection port is connected with a safety pressure relief valve; one end of the plunger pump is connected with an energy storage tank through a pipeline, the energy storage tank is connected with an air pressure pipe, one end, far away from the energy storage tank, of the air pressure pipe extends outwards to form a pipeline, one end, far away from the air pressure pipe, of the pipeline is provided with a shunting pipeline, and the ingress pipe, the air pressure pipe and the injection pipe are connected through the shunting pipeline; according to the invention, water is used as a pressure transmission medium to pressurize the battery shell to carry out high-strength pressure resistance detection.

Description

Technical Field

[0001] The present invention relates to the technical field of lead-acid battery production safety, and in particular to a device for detecting the pressure damage of a battery shell. Background Art

[0002] The pressure resistance of the battery shell directly affects the safety and reliability of the battery. Therefore, conducting pressure resistance testing and recording and feeding back real data during the battery manufacturing process are of great reference significance for the safety performance design of lead-acid batteries, ensuring that the shell does not rupture or leak under extreme conditions.

[0003] Gas testing is a common method for shell pressure testing, but its practical application is subject to numerous technical limitations and the risk of misjudgment, making it incapable of accurately predicting the ultimate shell strength. First, from a safety perspective, the gas test method requires relatively low test pressures, within 1.5 MPa. Exceeding this pressure poses an explosion risk, whereas hydraulic testing can reach pressures exceeding 10 MPa. Furthermore, gases expand and contract with heat and are easily affected by ambient temperature, ultimately impacting the accuracy and applicability of test results. Liquids, on the other hand, are incompressible, and their fluidity and near-rigid pressure transmission capabilities make them ideal media for shell pressure testing.

[0004] Therefore, it is necessary to develop a device that uses another medium to test the compressive strength of the battery shell. Summary of the Invention

[0005] In view of the technical defects existing in the background technology, the present invention proposes a device for detecting the pressure damage of lead-acid battery shells, which solves the above technical problems and meets the actual needs. The specific technical solution is as follows:

[0006] A device for detecting the pressure damage of a lead-acid battery shell, comprising: a frame, a detection box body, a water tank, a plunger pump, an energy storage tank, an air pressure tube and a control panel, wherein the frame is inlaid with a plurality of side panels, and the plurality of side panels are respectively combined into a detection area, a control area and a supply area; the detection area and the control area are respectively arranged above the supply area; the water tank body is arranged in the supply area, and a bottom plate is arranged below the supply area, the water tank body is above the bottom plate, and at least two injection ports are arranged on one side of the water tank body, one of the two injection ports is connected to a pressure relief valve, and the other injection port is connected to a safety pressure relief valve; at least two inlet ports are arranged on the other side of the water tank body, one of the two inlet ports is connected to an inlet pipe by a hose, and the other inlet is connected to an overflow pipe, and the other end of the overflow pipe extends downward and is connected to a drain pipe, and one end of the drain pipe is connected to a pressure relief valve. One end extends outward, and the other end is connected to the water tank body; one end of the injection pump is connected to the energy storage tank by a pipe, and the energy storage tank is connected to an air pressure tube, and a pipe is extended outward from the end of the air pressure tube away from the energy storage tank, and a shunt pipe is provided at the end of the pipe away from the air pressure tube, and the inlet pipe, the air pressure tube and the injection pipe are connected through the shunt pipe; the inlet pipe is arranged horizontally, and one end of the inlet pipe is connected to one of the several connection ports of the shunt pipe by a safety pressure relief valve, and the other connection port of the shunt pipe is connected to a horizontal pipe, and the horizontal pipe connected to the shunt pipe is connected to a pressure sensor and a pressure gauge; a connection port upward of the shunt pipe is connected to a pipe, which extends into the detection area and is connected to a water outlet valve, which is connected to the first water injection pipe and the second water injection pipe; the control panel is arranged in the control area.

[0007] The detection area is the detection box; the detection box and the control area are respectively covered with a top plate; a hook is provided in the detection box, the hook is fixed under the top plate, and the hook is hooked on the first water injection pipe and the second water injection pipe; the first water injection pipe and the second water injection pipe are respectively connected to the battery shell placed in the detection box.

[0008] The side panel located on the front side of the detection box is composed of two door leaves, and the two door leaves are connected to the two side panels of the detection box by a hinge at the vertical edges on both sides, and the two door leaves are fan-shaped and expanded in one direction by a hinge respectively; one of the two door leaves is provided with an observation window, and the observation window is inlaid with a transparent sheet.

[0009] The control panel is arranged on a side panel covering the control area; the control panel is a display panel, and a plurality of push buttons are arranged on a side adjacent to the control panel, and the control panel and the plurality of push buttons extend inwardly using electrical conduits.

[0010] A power motor is provided above the syringe pump, a support is connected to the bottom of the syringe pump, and the syringe pump is fixed to the base plate through the support; a pipe extending outward from the syringe pump, and the side opposite to the connected energy storage tank, is connected to the water tank body by a pipe.

[0011] The water tank body is located in the supply area; an opening is provided above the water tank body, and the opening is covered with a cover plate, a support frame is provided below the water tank body, and the water tank body is placed above the bottom plate through the support frame; a filter is provided in the water tank body, an opening is provided at one end of the filter, and a pipe is connected to the opening of the filter, which extends outward and is connected to the pipe extending outward from the injection pump; a water supply copper ball valve is provided inside the water tank body, and the water supply copper ball valve is composed of a wire, a hollow copper ball and a water supply valve, one end of the water supply copper ball valve passes across the water tank body and is connected to the inlet pipe, and the other end of the water supply copper ball valve faces inside the water tank body and is connected to a hollow copper ball with a wire; a low-level sensor is vertically provided in the water tank body.

[0012] The beneficial effects of the present invention are:

[0013] Taking advantage of the characteristics of liquid incompressibility, fluidity, and nearly rigid pressure transmission ability, it is selected as the ideal medium for pressure resistance testing.

[0014] The shell pressure is fed back in real time via a pressure sensor and fed back to the PLC system. The PLC performs data calculations based on the boost rate and transmits the real-time pressure value and the target pressure value to the frequency converter. The frequency converter performs PID calculations and outputs operating instructions to the plug-type metering pump to achieve gradual and uniform pressurization. The boost speed is controllable and adjustable (0.01-1MPA / S). The pressure is monitored and recorded in real time throughout the boost process, and the pressure curve is output. The shell deformation state is recorded in multiple directions by a high-definition camera until the shell ruptures. The pressure resistance test is completed, and the highest bursting pressure is recorded. The first rupture point is discovered through image recording.

[0015] The water inlet is divided into two routes. One route is tap water directly into the test housing, filling the housing first and then evacuating the air inside. The second route is a plunger pump that pumps water into the housing for pressurized testing. The two water inlets are controlled separately and have different pressure requirements, effectively improving testing efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 The present invention is a schematic diagram of the three-dimensional structure of a device for detecting the pressure damage of a lead-acid battery shell.

[0017] Figure 2 The figure is another three-dimensional structural diagram of a lead-acid battery shell pressure damage detection device.

[0018] Figure 3 The figure is a schematic diagram of the internal structure of a device for detecting the pressure damage of a lead-acid battery shell.

[0019] Figure 4 The present invention is a schematic diagram of the combined connection structure of a water tank, an injection pump, an energy storage tank and an air pressure pipe used in a lead-acid battery shell pressure damage detection device.

[0020] Figure 5 The present invention is a schematic diagram of the combined connection structure of an injection pump, an energy storage tank and an air pressure pipe used in a lead-acid battery shell pressure damage detection device.

[0021] Figure 6 The figure is a schematic diagram of the internal structure of a water tank used in lead-acid battery shell pressure damage detection equipment.

[0022] Figure 7 This is another schematic diagram of the internal structure of a water tank used in lead-acid battery shell pressure damage detection equipment. DETAILED DESCRIPTION

[0023] The following describes the implementation of the present invention in conjunction with the accompanying drawings and relevant embodiments. The implementation of the present invention is not limited to the following embodiments, and the present invention relates to the relevant necessary components in this technical field, which should be regarded as the common knowledge in this technical field and can be known and mastered by technical personnel in this technical field.

[0024] like Figures 1 to 7As shown, a device for detecting the pressure damage of a lead-acid battery shell comprises: a frame 1, a detection box body 2, a water tank 3, a plunger pump 4, an energy storage tank 5, an air pressure tube 6 and a control panel 7. The frame 1 is inlaid with a plurality of side panels 11, and the plurality of side panels 11 are respectively combined into a detection area, a control area and a supply area; the detection area and the control area are respectively arranged above the supply area; the water tank body 3 is arranged in the supply area, and a bottom plate 13 is arranged below the supply area. The water tank body 3 is above the bottom plate 13. At least two injection ports are arranged on one side of the water tank body 3, one of the two injection ports is connected to a pressure relief valve, and the other injection port is connected to a safety pressure relief valve; at least two inlet ports are arranged on the other side of the water tank body 3, one of the two inlet ports is connected to an inlet pipe 31 by a hose, and the other inlet is connected to an overflow pipe, and the other end of the overflow pipe extends downward and is connected to a drain pipe 35, and one end of the drain pipe 35 is outward The evaporator 5 has a plurality of air intake ports, and the evaporator 5 has a plurality of air intake ports, and the evaporator 5 has a plurality of air intake ports, and the evaporator 5 has a plurality of air intake ports, and the evaporator 5 has a plurality of air intake ports, and the evaporator 5 has a plurality of air intake ports, and the evaporator 5 has a plurality of air intake ports, and the evaporator 5 has a plurality of air intake ports, and the evaporator 5 has a plurality of air intake ports, and the evaporator 5 has a plurality of air intake ports, and the evaporator 5 has a plurality of air intake ports, and the evaporator 5 has a plurality of air intake ports, and the evaporator 5 has a plurality of air intake ports, and the evaporator 5 has a plurality of air intake ports, and the evaporator 5 has a plurality of air intake ports, and the evaporator 5 has a plurality of air intake ports, and the evaporator 5 has a plurality of air intake ports, and the evaporator 5 has a plurality of air intake ports, and the evaporator 5 has a plurality of air intake ports, and the evaporator 5 has a plurality of air intake ports, and the evaporator 5 has a plurality of air intake ports, and the evaporator 5 has a plurality of air intake ports, and the evaporator 5 has a plurality of air intake ports, and the evaporator 5 has a plurality of air intake ports, and the evaporator 5 has a plurality of air intake ports, and the evaporator 5 has a plurality of air intake ports, and the evaporator 5 has a plurality of air intake ports, and the evaporator 5 has a plurality of air intake ports, and the evaporator 5 has a plurality of

[0025] Taking advantage of the characteristics of liquid incompressibility, fluidity, and nearly rigid pressure transmission ability, it is selected as the ideal medium for pressure resistance testing.

[0026] The shell pressure is fed back in real time through the pressure sensor 62 and fed back to the PLC system. The PLC performs data calculations based on the boost rate and transmits the real-time pressure value and the target pressure value to the frequency converter. The frequency converter outputs an operating instruction to the plug-type metering pump through PID calculation to achieve gradual and uniform pressurization. The boost speed is controllable and adjustable (0.01-1MPA / S). The pressure is monitored and recorded in real time during the entire boost process, and the pressure curve is output. The shell deformation state is recorded in multiple directions by a high-definition camera until the shell ruptures, completing the pressure resistance test, and recording the highest bursting pressure. The first rupture point is discovered through image recording.

[0027] The water inlet is divided into two routes. One route is tap water directly into the test housing, filling the housing first and then evacuating the air inside. The second route is a plunger pump that pumps water into the housing for pressurized testing. The two water inlets are controlled separately and have different pressure requirements, effectively improving testing efficiency.

[0028] The pressure sensor 62 used in the present invention is composed of a small flow injection plug metering pump, a frequency converter, a PLC, a host computer, a high-definition high-speed camera, etc., and forms a closed-loop control system.

[0029] The side panels 11 and the frame 1 of the present invention are respectively made of stainless steel plates, which can prevent safety accidents caused by shell explosion and medium splashing during testing.

[0030] Furthermore, the detection pipeline of the present invention is provided with a safety pressure switch, which can automatically release the pressure when the set pressure is reached, thereby preventing the system pressure from being out of control and causing equipment damage and safety accidents.

[0031] The process is as follows:

[0032] (1) Low-pressure water inlet: first fill the battery shell to be tested with water and exhaust the air inside.

[0033] (1) Place the shell to be tested into the test box.

[0034] (2) Open the water inlet valve and adjust the water pressure regulating valve to control the water pressure at around 2 kg.

[0035] (3) Open the water outlet valve, align the hose outlet with the water inlet of the shell, press the button to open the water inlet solenoid valve, fill the shell with water, empty the internal air, and close the water inlet solenoid valve. The first step is completed.

[0036] (2) Boost water pressure and conduct pressure test

[0037] (1) Connect the water outlet to the water inlet of the shell to ensure that it is sealed and leak-proof.

[0038] (2) Set the boost rate on the touch screen, such as 0.01 MPA / S.

[0039] (3) Safety pressure relief valve, set the protection pressure, such as 1MPA, the system will automatically trigger pressure relief and drainage when the pressure is greater than 1MPA to ensure safety and prevent equipment damage.

[0040] (4) After the preparation work is confirmed to be completed, close the inspection door and press the automatic start button. The system will automatically run and the water pump will start.

[0041] (5) The pressure sensor feeds back the shell pressure in real time and feeds it back to the PLC system. The PLC performs data calculations based on the pressure increase rate and transmits the real-time pressure value and the target pressure value to the frequency converter. The frequency converter outputs the operation instructions to the plunger metering pump through PID calculation to achieve gradual and uniform pressurization. The pressure is monitored and recorded in real time during the entire pressure increase process, and the pressure curve is output. The shell deformation is recorded in multiple directions through a high-definition camera until the shell ruptures and the pressure resistance test is completed. The system automatically records the peak pressure and saves the deformation image.

[0042] (6) After the pressure test is completed, the pressure relief valve is automatically opened to restore the shell to normal pressure, and the test is completed.

[0043] The detection and analysis results are as follows:

[0044] 1. If the maximum bursting pressure is greater than the design pressure, it means that the shell pressure resistance meets the design requirements and the product is qualified.

[0045] 2. If the maximum burst pressure is less than the design pressure, the shell is unqualified and requires analysis and improvement based on the location of the rupture. This may include poor welding process, uneven material thickness, or design flaws in the sealing structure. Improvement measures should be provided for the failure phenomenon, such as optimizing laser welding parameters, adding shell reinforcement ribs, or improving the seal or cover design.

[0046] According to the test results, it can also assist in design, material selection or brand model replacement, such as ABS material and epoxy resin used in the shell, and it can also reduce costs for new product evaluation.

[0047] In the present invention:

[0048] 1. Step-by-step pressurization forms a closed-loop control through PLC, frequency converter, and high-precision sensor. Liquid is used instead of gas for pressurization. The pressure increases slowly and evenly until the shell ruptures. The pressure control is stable and accurate throughout the whole process.

[0049] 2. Combined with pressure sensors and high-definition high-speed cameras, it records pressure values ​​in real time, simultaneously captures the deformation process, records the entire test data, and accurately captures the critical point of failure.

[0050] When the pressure exceeds the limit, pressure relief is automatically triggered to prevent the equipment from being damaged by overpressure due to loss of control.

[0051] The detection area is the detection box 2; the detection box 2 and the control area are respectively covered with a top plate 12; a hook 20 is provided in the detection box 2, and the hook 20 is fixed under the top plate 12, and the hook 20 is hooked on the first water injection pipe 21 and the second water injection pipe 22; the first water injection pipe 21 and the second water injection pipe 22 are respectively connected to the battery shell placed in the detection box 2.

[0052] The side panel 11 provided on the front side of the detection box 2 is composed of two door leaves, and the two door leaves are connected to the side panels 11 of the detection box 2 on both sides by a hinge at the vertical edges on both sides, and the two door leaves are fan-shaped and expanded in one direction by a hinge respectively; one of the two door leaves is provided with an observation window 15, and the observation window 15 is inlaid with a transparent sheet.

[0053] The control panel 7 is arranged on the side panel 11 covering the control area; the control panel 7 is a display panel, and a plurality of push buttons are arranged on a side adjacent to the control panel 7, and the control panel 7 and the plurality of push buttons extend inward using electrical conduits.

[0054] A power motor 41 is provided above the syringe pump 4, a support member 42 is connected to the bottom of the syringe pump 4, and the syringe pump 4 is fixed to the bottom plate 13 through the support member 42; the pipe extending outward from the syringe pump 4, and the side opposite to the connected energy storage tank 5, is connected to the water tank body 3 by a pipe.

[0055] After adopting the above structure, it needs to be further explained that the support member 42 can raise the plunger pump 4 upward, and by raising it upward, it can prevent the vibration of the internal and external standby of the present invention from affecting the plunger pump 4.

[0056] The water tank body 3 is located in the supply area; an opening is provided above the water tank body 3, and the opening is covered with a cover plate 39, and a support frame 38 is provided below the water tank body 3, and the water tank body 3 is located above the bottom plate 13 through the support frame 38; a filter 36 is provided in the water tank body 3, and an opening is provided at one end of the filter 36, and a pipe is connected to the opening of the filter 36, which extends outward and is connected to the pipe extending outward from the injection pump 4; a water replenishment copper ball valve 34 is provided inside the water tank body 3, and the water replenishment copper ball valve 34 is composed of a wire, a hollow copper ball and a water replenishment valve. One end of the water replenishment copper ball valve 34 passes through the outside of the water tank body 3 and is connected to the inlet pipe 31, and the other end of the water replenishment copper ball valve 34 faces into the water tank body 3 and is connected to a hollow copper ball with a wire; a low-level sensor 37 is vertically provided in the water tank body 3.

[0057] The above description is only a preferred embodiment of the present invention. It should be pointed out that ordinary technicians in this technical field can make several improvements and modifications without departing from the principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A lead-acid battery shell pressure damage detection device, comprising: The frame, the detection box, the water tank, the injection pump, the energy storage tank, the air pressure tube and the control panel are characterized in that the frame is inlaid with a plurality of side panels, and the plurality of side panels are respectively combined into a detection area, a control area and a supply area; The detection area and control area are located above the supply area; The water tank body is arranged in the supply area, a bottom plate is arranged below the supply area, the water tank body is above the bottom plate, and at least two injection ports are arranged on one side of the water tank body, one of the two injection ports is connected to a pressure relief valve, and the other injection port is connected to a safety pressure relief valve; At least two inlet ports are provided on the other side of the water tank body, one of the two inlet ports is connected to an inlet pipe by a hose, and the other inlet port is connected to an overflow pipe, and the other end of the overflow pipe extends downward and is connected to a drain pipe, one end of the drain pipe extends outward, and the other end is connected to the water tank body; One end of the injection pump is connected to the energy storage tank by a pipeline, and the energy storage tank is connected to an air pressure pipe. A pipeline is extended outward from the end of the air pressure pipe away from the energy storage tank, and a shunt pipeline is provided at the end of the pipeline away from the air pressure pipe, and the inlet pipe, the air pressure pipe and the injection pipe are connected through the shunt pipeline; The inlet pipe is arranged horizontally, and one end of the inlet pipe is connected to one of the several connection ports of the diversion pipe through a safety pressure relief valve, and the other connection port of the diversion pipe is connected to a horizontal pipe, and the horizontal pipe connected to the diversion pipe is connected to a pressure sensor and a pressure gauge; The diversion pipe is connected to a pipe at an upper connection port, the pipe extends into the detection area and is connected to a water outlet valve, and the water outlet valve is connected to the first water injection pipe and the second water injection pipe; The control panel is arranged in the control area.

2. The lead-acid battery shell pressure damage detection device according to claim 1, characterized in that: The detection area is the detection box; The detection box and the control area are respectively covered with a top plate; A hook is provided in the detection box, the hook is fixed below the top plate, and the hook is hooked on the first water injection pipe and the second water injection pipe; The first water injection pipe and the second water injection pipe are respectively connected to the battery shell placed in the detection box.

3. The lead-acid battery shell pressure damage detection device according to claim 2, characterized in that: The side panel provided on the front side of the detection box body is composed of two door leaves, and the two door leaves are connected to the two side panels of the detection box body by a hinge at the vertical edges on both sides, and the two door leaves are respectively opened in a fan shape in one direction by a hinge; One of the two door leaves is provided with an observation window, and the observation window is inlaid with a transparent sheet.

4. The lead-acid battery shell pressure damage detection device according to claim 1, characterized in that: The control panel is provided on the side panel covering the control area; The control panel is a display panel, and a plurality of push buttons are provided on a side adjacent to the control panel. The control panel and the plurality of push buttons extend inwardly using electrical conduits.

5. The lead-acid battery shell pressure damage detection device according to claim 1, characterized in that: A power motor is provided above the plunger pump, a support member is connected to the bottom of the plunger pump, and the plunger pump is fixed to the bottom plate through the support member; The pipe extending outward from the injection pump is connected to the water tank body via a pipe on the side opposite to the energy storage tank.

6. The lead-acid battery shell pressure damage detection device according to claim 1, characterized in that: The water tank is located in the supply area.

7. An opening is provided above the water tank body, and the opening is covered with a cover plate. A support frame is provided below the water tank body, and the water tank body is placed above the bottom plate through the support frame.

8. A filter is provided in the water tank, one end of the filter is provided with an opening, and a pipe is connected to the opening of the filter, the pipe extending outward and connected to the pipe extending outward from the injection pump; A water supply copper ball valve is provided inside the water tank body. The water supply copper ball valve is composed of a wire, a hollow copper ball and a water supply valve. One end of the water supply copper ball valve passes through the water tank body and is connected to the inlet pipe. The other end of the water supply copper ball valve faces inside the water tank body and is connected to a hollow copper ball with a wire. A low-position sensor is vertically arranged in the water tank.

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