Current probe self-checking tool

Abstract

The utility model discloses a current probe self-inspection tool comprising a rack and a detection assembly, and the detection assembly is arranged on the rack. The detection assembly comprises a control circuit board, a positive electrode power connection piece and a negative electrode power connection piece, a plurality of detection modules are arranged on the control circuit board, and the detection modules are electrically connected with the control circuit board; the control circuit board is electrically connected with the positive electrode power connection piece and the negative electrode power connection piece. According to the current probe self-checking tool, the current probe is electrically connected with the detection assembly on the rack, the working condition that charging and discharging equipment forms a current loop through the probe and the battery for charging and discharging is simulated, the detection assembly can detect the fault of the current probe in advance, the fault probe is replaced in time, and the working efficiency is improved. And the re-feeding rate of the battery cell in the production process is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of battery production, in particular to a current probe self-testing tool. Background Art

[0002] As lithium batteries become increasingly important in our lives, the quality of their production is becoming increasingly important. Charging and discharging equipment is a crucial component of lithium battery production. Current lithium battery manufacturing processes require charging and discharging testing in two key steps: the formation step, which activates the battery, and the capacity calibration step, which calibrates the battery capacity. The charging and discharging testing process involves placing the battery in the lower needle bed. The upper and lower needle beds are then pressed against the battery. The probe plate on the upper needle bed contacts the battery through its probes, and the charging and discharging equipment completes a circuit with the battery to perform charging and discharging.

[0003] However, the current inspection of the probe plate can only be done by manually visually inspecting the outermost probes of the probe plate and the battery pressing part when the needle bed is pressed against the battery. There is no solution to use tooling inspection. This leads to the following problems: 1. It is impossible to determine whether the compression of all probes meets the process requirements. If the flatness of the probe fixing plate of the probe plate is poor (concave inward), it will cause insufficient contact between the middle probe and the battery, resulting in excessive contact resistance, generating additional heat, leading to energy waste, and risks to warehouse safety; and excessive compression of the probe will lead to excessive rebound force, which will cause the probe to produce irreversible indentations on the battery pole, affecting the module welding effect. 2. The current probe failure cannot be predicted in advance, affecting the charge and discharge performance of the battery, leading to product quality problems.

[0004] Therefore, there is an urgent need for a current probe self-test tool to overcome the above-mentioned defects. Utility Model Content

[0005] In order to overcome at least one of the defects described in the above-mentioned prior art, the purpose of the present invention is to provide a current probe self-test tool, which can detect whether the current probe is faulty, screen out normal current probes for use in charge and discharge tests, and reduce the re-injection rate of battery cells during the production process.

[0006] The technical solution adopted by the present invention to solve the problem is:

[0007] A current probe self-test tool includes a frame and a detection component, wherein the detection component is arranged on the frame; the detection component includes a control circuit board, a positive pole connection piece and a negative pole connection piece, the control circuit board is provided with multiple detection modules, and the multiple detection modules are electrically connected to the control circuit board; the control circuit board is electrically connected to the positive pole connection piece and the negative pole connection piece.

[0008] As a preferred technical solution of the present invention, the positive electrode connection piece and the negative electrode connection piece both include a connection copper sheet and an aluminum block, the aluminum block is connected to the upper surface of the connection copper sheet; the connection copper sheet is connected to the control circuit board via a wire.

[0009] As a preferred technical solution of the present invention, the detection module includes a current sensor, a circuit detection module, a power control module and a communication module, and the current sensor, circuit detection module, power control module and communication module are all connected to the control circuit board through wires.

[0010] As a preferred technical solution of the present invention, the detection component includes a pressure sensor, which is used to detect the pressure value of the current probe when the current probe presses down the positive electrode connection piece and the negative electrode connection piece.

[0011] As a preferred technical solution of the present invention, a signal output terminal is provided on the rack, and the signal output terminal is connected to the communication module via a wire.

[0012] As a preferred technical solution of the present invention, the frame includes a top plate, and the positive and negative pole connecting parts are arranged on the top plate; a first mounting plate and a second mounting plate are provided on the top plate, and the first mounting plate and the second mounting plate are both movably connected to the top plate; the positive pole connecting part is provided on the first mounting plate, and the negative pole connecting part is provided on the second mounting plate.

[0013] As a preferred technical solution of the present invention, sliders are provided at both ends of the first mounting plate and the second mounting plate, and slideways are provided at both ends of the top plate. The sliders are slidably connected to the slideways so that the distance between the first mounting plate and the second mounting plate can be adjusted.

[0014] As a preferred technical solution of the present invention, a scale is provided on one side of the slideway, and the scale can locate the position of the slider.

[0015] As a preferred technical solution of the present invention, the frame includes a bottom plate, the top plate is opposite to the bottom plate and is arranged at an interval, and the top plate is connected to the top of the bottom plate through a plurality of support columns; the control circuit board is arranged in the space enclosed by the top plate and the bottom plate.

[0016] As a preferred technical solution of the present invention, a power port is provided on the bottom plate, and the power port is connected to the control circuit board via a wire.

[0017] In summary, the current probe self-test tool provided by the present invention has the following technical effects:

[0018] 1) The current probe self-test tool of the present invention is electrically connected to the detection component on the rack through the current probe, simulating the working condition of the charging and discharging equipment to form a current loop with the battery through the probe. The internal resistance and voltage of the current probe during use are detected by the detection component. Faulty probes can be identified before the charge and discharge test, thereby avoiding quality problems in the battery production process in advance and reducing the re-investment rate of battery cells during the production process.

[0019] 2) Using a current probe with qualified performance and stable status to conduct charge and discharge tests can ensure the stable quality of battery products from a process perspective. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the overall structure of the current probe self-test tooling according to an embodiment of the present utility model;

[0021] Figure 2 A top view of a current probe self-test tool according to an embodiment of the present invention;

[0022] Figure 3 A bottom view of the current probe self-test tooling according to an embodiment of the present utility model;

[0023] Figure 4 This is a front view of a current probe self-test tool according to an embodiment of the present utility model;

[0024] Figure 5 This is a side view of the current probe self-test tooling according to an embodiment of the present utility model.

[0025] The meanings of the reference numerals are as follows:

[0026] 1. Frame; 11. Positive terminal; 12. Negative terminal; 13. Signal output terminal; 14. Power port; 15. Aluminum block; 2. Top plate; 21. First mounting plate; 22. Second mounting plate; 23. Slider; 24. Slide; 25. Scale; 3. Bottom plate; 31. Support column; 32. Positioning hole; 33. Support plate. DETAILED DESCRIPTION

[0027] For better understanding and implementation, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0028] In the description of the present invention, it should be noted that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the present invention.

[0029] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0030] See Figure 1 and Figure 2 The present invention discloses a current probe self-test tool, which includes a frame 1 and a detection assembly, wherein the detection assembly is disposed on the frame 1. Specifically, the detection assembly includes a control circuit board, a positive terminal 11, and a negative terminal 12. The control circuit board is provided with multiple detection modules, and the multiple detection modules are electrically connected to the control circuit board. In addition, the control circuit board is electrically connected to the positive terminal 11 and the negative terminal 12.

[0031] Based on this structure, when using the current probe self-test tool of the present invention, the current probe self-test tool can be placed under the current probe of the charging and discharging device. During the test, the current probe is pressed down and contacts the positive electrode connection piece 11 and the negative electrode connection piece 12, so that the current probe and the detection component form a current loop. The current of the charging and discharging device flows into the current probe self-test tool through one current probe and the positive electrode connection piece 11, flows through the control circuit board, and then flows out through the negative electrode connection piece 12 and the other current probe and returns to the charging and discharging device.

[0032] Among them, the control circuit board can perform current detection, voltage detection, internal resistance detection, pressure detection, etc. on the current probe through multiple detection modules, and then collect and upload the corresponding detection values; the staff can then comprehensively judge whether the current probe is faulty based on the detection values and replace the faulty probe.

[0033] The current probe self-test fixture of this utility model enables current probe self-testing, identifying faulty probes before charge and discharge tests, thus preventing quality issues during battery production. Furthermore, automatic probe testing by the current probe self-test fixture reduces the need for manual probe testing and improves on-site maintenance efficiency.

[0034] It should be noted that the current probe self-test tool of the present invention is electrically connected to the detection component on the frame 1 through the current probe, simulating the working condition of the charging and discharging equipment to form a current loop with the battery through the probe. The detection component can detect the failure of the current probe in advance, making it convenient for the staff to replace the faulty probe in time and reduce the re-investment rate of the battery cell during the production process.

[0035] As a preferred technical solution of the present invention, the positive electrode connection piece 11 and the negative electrode connection piece 12 both include a connection copper sheet and an aluminum block 15. Figure 4 The aluminum block 15 is connected to the upper surface of the power copper sheet, which is connected to the control circuit board via a wire.

[0036] It should be noted that in some specific battery designs, the aluminum block 15 is combined with other materials (such as copper or nickel) to form a composite electrode structure. Specifically, the aluminum block 15 serves as a supporting structure or conductive substrate, while copper or nickel, a more corrosion-resistant and conductive material, is used for the portion in contact with the electrolyte. This structure can combine the advantages of different materials to improve battery performance and stability.

[0037] Therefore, in order to make the current probe self-test tool of the present invention more consistent with the actual working conditions in the battery production process when in use, the present invention uses an aluminum block 15 and a power-connecting copper sheet to form a power connection piece, which simulates the battery pole to contact the current probe through the power connection piece.

[0038] Among them, the copper connecting sheet and the aluminum block 15 are both conductive, so when the positive electrode connecting piece 11 and the negative electrode connecting piece 12 are in contact with the current probe, a current loop can be formed. The current of the charging and discharging device can be input into the current probe self-test tooling through the current probe and the positive electrode connecting piece 11, and after flowing through the control circuit board, it can be output through the negative electrode connecting piece 12 and another current probe, thereby realizing stable current transmission.

[0039] As a preferred technical solution of the present invention, the detection module includes a current sensor, a circuit detection module, a power control module and a communication module, and the current sensor, circuit detection module, power control module and communication module are all connected to the control circuit board through wires.

[0040] Specifically, the circuit detection module includes one or more instruments such as a multimeter, oscilloscope, and signal generator. The power control module consists of a high-power amplifier, power management circuit, and voltage stabilization circuit, and can integrate components such as a DC / DC control chip, a high-power MOS transistor, a high-power inductor, and an INA226 sampling circuit. The communication module includes a microprocessor (CPU), a digital signal processor (DSP), a modem, and input / output (I / O) ports. Furthermore, the detection assembly also includes power lines and sampling lines. The power lines connect the power supply and current probe of the charging and discharging device, and the sampling lines connect the positive terminal 11 to the control circuit board, and the negative terminal 12 to the control circuit board.

[0041] The sampling line transmits various parameter information to the circuit detection module, enabling it to measure parameters such as voltage, current, and resistance within the circuit. The power control module detects the voltages of the sampling and power lines and converts low-voltage, low-current inputs into high-voltage, high-current output signals, which serve as voltage compensation to improve the test accuracy of the circuit detection module. The communication module outputs the detection results of the current sensor and circuit detection module as electrical signals, enabling data transmission and communication between devices.

[0042] In addition, the current sensor can be connected in series to the circuit to ensure that current flows through the sensor. The output of the current sensor is connected to the input of a multimeter, and the multimeter can read the voltage or current value output by the current sensor.

[0043] In this way, staff can comprehensively judge the current probe's usage status based on the test results of the current sensor and circuit detection module, screen out faulty probes, and replace them promptly. Using tested and qualified current probes with stable performance for charge and discharge testing can ensure the stable quality of battery products from a process perspective.

[0044] As a preferred technical solution of the present invention, the detection component includes a pressure sensor, and the pressure sensor is used to detect the pressure value of the current probe when the current probe presses the positive electrode connection piece 11 and the negative electrode connection piece 12.

[0045] Specifically, the pressure sensor can be arranged on the upper surface of the positive electrode connection piece 11 and the negative electrode connection piece 12. During the detection process, the current probe contacts the pressure sensor from above, and the pressure sensor is used to detect the pressure when the probe is pressed down.

[0046] The pressure sensor is also connected to a communication module via a wire, which collects and transmits the pressure readings from the pressure sensor. Based on the pressure readings, staff can identify probes that are insufficiently in contact with the electrical connector and those that are overstressing the connector. This prevents problems such as excessive contact resistance and excessive heat generation caused by poor contact between some probes and the battery during charging and discharging, as well as irreversible indentations on the battery terminals caused by overstressing the battery.

[0047] As a preferred technical solution of the present invention, a signal output terminal 13 is provided on the rack 1, and the signal output terminal 13 is connected to the communication module through a wire.

[0048] During use, other external devices can be connected to the signal output terminal 13 via a wire, thereby realizing data transmission and communication with the current probe self-test tool. Thus, the communication module in the rack 1 can transmit the detection values of the current sensor and the circuit detection module to the outside through the wire.

[0049] As a preferred technical solution of the present invention, the frame 1 includes a top plate 2, and the positive electrode connection member 11 and the negative electrode connection member 12 are both arranged on the top plate 2. Figure 2 A first mounting plate 21 and a second mounting plate 22 are provided on the top plate 2, and both the first mounting plate 21 and the second mounting plate 22 are movably connected to the top plate 2. The first mounting plate 21 is provided with a positive electrode connection member 11, and the second mounting plate 22 is provided with a negative electrode connection member 12.

[0050] Based on this structure, since both first mounting plate 21 and second mounting plate 22 are movably mounted on top plate 2, the spacing between positive terminal 11 on first mounting plate 21 and negative terminal 12 on second mounting plate 22 is adjustable. When in use, the current probe self-test tool can simulate charge and discharge tests of batteries of different specifications by adjusting the spacing between positive terminal 11 and negative terminal 12.

[0051] Therefore, the current probe self-test tool of the present invention can adaptively adjust the distance between the positive and negative electrical connections according to the specifications of the battery under charge and discharge test, and then connect it to the current probe to perform simulated detection of the charge and discharge test, so that the simulated detection conditions are as close as possible to the actual conditions of the charge and discharge test.

[0052] Furthermore, the first mounting plate 21 is provided with multiple positive terminals 11 spaced apart along its extension direction, while the second mounting plate 22 is provided with multiple negative terminals 12 spaced apart along its extension direction. The current probe self-test tool can simultaneously test multiple sets of current probes, with the positive probes of each set connected to the positive terminal 11 and the negative probes to the negative terminal 12. This improves the efficiency of current probe testing.

[0053] As a preferred technical solution of the present invention, both ends of the first mounting plate 21 and the second mounting plate 22 are provided with sliders 23, and both ends of the top plate 2 are provided with slideways 24, see Figure 5 The slider 23 is slidably connected to the slideway 24 so that the distance between the first mounting plate 21 and the second mounting plate 22 can be adjusted.

[0054] Based on this structure, slideways 24 are provided at both ends of the top plate 2 along the length direction, and the slideways 24 extend along the width direction of the top plate 2. During assembly, the first mounting plate 21 and the second mounting plate 22 can be spaced apart along the width direction of the top plate 2, and the sliders 23 at both ends of the first mounting plate 21 and the second mounting plate 22 can be slidably connected to the slideways 24.

[0055] In this way, the distance between the first mounting plate 21 and the second mounting plate 22 can be adjusted, and thus the distance between the positive electrode connection member 11 and the negative electrode connection member 12 can be adjusted.

[0056] As a preferred technical solution of the present invention, a scale 25 is provided on one side of the slideway 24 , and the scale 25 can locate the position of the slider 23 .

[0057] Therefore, the staff can slide the sliders 23 on the first mounting plate 21 and the second mounting plate 22 to form the corresponding spacing according to the distance between the positive and negative poles on the battery under charge and discharge test, and the scale 25 facilitates the staff to perform quantitative adjustment.

[0058] As a preferred technical solution of the present invention, the frame 1 includes a bottom plate 3, see Figure 1 The top plate 2 and the bottom plate 3 are opposite and spaced apart, and the top plate 2 is connected to the top of the bottom plate 3 through a plurality of support columns 31. The control circuit board is arranged in the space enclosed by the top plate 2 and the bottom plate 3.

[0059] Based on this structure, the bottom plate 3 is provided with a plurality of positioning holes 32. During assembly, the top plate 2 is inserted into the positioning holes 32 via a plurality of support columns 31. In addition, a support plate 33 is provided between the top plate 2 and the bottom plate 3. The support plate 33 can be arranged around the bottom plate 3; the support plate 33 can be a sheet metal part.

[0060] Since the current probe assembly exerts a greater pressure on the top plate 2 of the self-test fixture when pressing down and contacting the positive terminal 11 and the negative terminal 12 , the top plate 2 can be supported by multiple support columns 31 and support plates 33 to improve its pressure bearing capacity.

[0061] As a preferred technical solution of the present invention, refer to Figure 3A power port 14 is provided on the bottom plate 3 , and the power port 14 is connected to the control circuit board through a wire.

[0062] Specifically, the power port 14 includes an electrode column, which can be connected to an external power source through a wire. Thus, the external power source can power the current probe self-test tool to ensure the operation of the control circuit board.

[0063] The technical means disclosed in the present invention are not limited to those disclosed in the above-mentioned embodiments, but also include technical solutions composed of any combination of the above-mentioned technical features. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of the present invention, and such improvements and modifications are also considered to be within the scope of protection of the present invention.

Claims

1. A current probe self-test tool, characterized in that: It includes a frame and a detection component, which is arranged on the frame; the detection component includes a control circuit board, a positive pole connection piece and a negative pole connection piece, and the control circuit board is provided with multiple detection modules, and the multiple detection modules are electrically connected to the control circuit board; the control circuit board is electrically connected to the positive pole connection piece and the negative pole connection piece.

2. The current probe self-test tool according to claim 1, characterized in that: The positive electrode connection piece and the negative electrode connection piece both include a connection copper sheet and an aluminum block, wherein the aluminum block is connected to the upper surface of the connection copper sheet; the connection copper sheet is connected to the control circuit board via a wire.

3. The current probe self-test tool according to claim 1, characterized in that: The detection module includes a current sensor, a circuit detection module, a power control module and a communication module, and the current sensor, circuit detection module, power control module and communication module are all connected to the control circuit board through wires.

4. The current probe self-test tool according to claim 3, characterized in that: The detection component includes a pressure sensor, and the pressure sensor is used to detect the pressure value of the current probe when the current probe presses the positive electrode connection piece and the negative electrode connection piece.

5. The current probe self-test tool according to claim 3, characterized in that: The rack is provided with a signal output terminal, and the signal output terminal is connected to the communication module through a wire.

6. The current probe self-test tool according to claim 1, characterized in that: The frame includes a top plate, and the positive and negative pole connecting parts are arranged on the top plate; a first mounting plate and a second mounting plate are provided on the top plate, and the first mounting plate and the second mounting plate are both movably connected to the top plate; the positive pole connecting part is provided on the first mounting plate, and the negative pole connecting part is provided on the second mounting plate.

7. The current probe self-test tool according to claim 6, characterized in that: Both ends of the first mounting plate and the second mounting plate are provided with sliders, and both ends of the top plate are provided with slideways, and the sliders are slidably connected to the slideways so that the distance between the first mounting plate and the second mounting plate can be adjusted.

8. The current probe self-test tool according to claim 7, characterized in that: A scale is provided on one side of the slideway, and the scale can be used to locate the position of the slider.

9. The current probe self-test tool according to claim 6, characterized in that: The frame includes a bottom plate, the top plate is opposite to the bottom plate and spaced apart, the top plate is connected to the top of the bottom plate through a plurality of support columns; the control circuit board is arranged in a space enclosed by the top plate and the bottom plate.

10. The current probe self-test tool according to claim 9, characterized in that: The bottom plate is provided with a power port, and the power port is connected to the control circuit board through a wire.

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