Battery nondestructive detector

Abstract

The utility model discloses a nondestructive testing instrument for a battery, which comprises a rack and a workbench arranged on the rack, and further comprises a first magnetic sensor arranged on the rack and used for scanning a magnetic field in the battery arranged on the workbench and outputting a scanning result, and a second magnetic sensor arranged on the rack and used for scanning the magnetic field in the battery arranged on the workbench and outputting a scanning result, the first movement mechanism is arranged on the rack, and the first magnetic sensor is arranged on the first movement mechanism and moves relative to the rack under the driving of the first movement mechanism. The device can be used for nondestructively detecting internal defects of the battery.

Description

TECHNICAL FIELD

[0001] The utility model relates to battery detection, more exactly is a kind of battery nondestructive testing instrument. BACKGROUND

[0002] The traditional battery defect detection mode is to detect the size of the internal voltage and resistance of battery, compared with defect-free battery, and deduce whether there is defect inside battery, this kind of mode has the following problem points:

[0003] 1, before battery hot-pressing formation, whether the battery cell is defective cannot be detected.

[0004] 2, after battery hot-pressing formation, the size of internal voltage and resistance of battery can be used to judge whether the battery is defective, but without damaging the structure of battery cell, the position of defect cannot be judged.

[0005] 3, this detection means must be damaged and disassembled after battery cell, to know the specific defect type.

[0006] Obviously, the existing battery defect detection is all destructive detection, and the battery will be damaged during detection. INVENTION CONTENTS

[0007] The utility model discloses a kind of battery nondestructive testing instruments to solve the technical problem that battery detection of prior art can damage battery.

[0008] To solve the above technical problems, the utility model adopts the technical scheme of designing a kind of battery nondestructive testing instrument, including rack and workbench on the rack, the battery nondestructive testing instrument further includes:

[0009] First magnetic sensor, it is located on the rack, the first magnetic sensor scans the magnetic field inside battery placed on the workbench and exports scanning result;

[0010] First motion mechanism, it is located on the rack, the first magnetic sensor is located on the first motion mechanism and moves relative to the rack under the drive of the first motion mechanism.

[0011] The first motion mechanism includes:

[0012] First Y-axis motion mechanism, it includes first Y-axis guide rail fixed on the rack, first Y-axis moving part on the first Y-axis guide rail and movable relative to the first Y-axis guide rail left and right and first Y-axis drive device connected with the first Y-axis moving part and drive the first Y-axis moving part along the first Y-axis guide rail left and right movement;

[0013] a first X-axis movement mechanism including a first X-axis guide rail fixed on the first Y-axis movement member, a first X-axis movement member arranged on the first X-axis guide rail and capable of moving forward and backward relative to the first X-axis guide rail, and a first X-axis driving device connected with the first X-axis movement member and driving the first X-axis movement member to move forward and backward along the first X-axis guide rail;

[0014] a first Z-axis movement mechanism including a first Z-axis guide rail fixed on the first X-axis movement member, a first Z-axis movement member arranged on the first Z-axis guide rail and capable of moving upward and downward relative to the first Z-axis guide rail, and a first Z-axis driving device connected with the first Z-axis movement member and driving the first Z-axis movement member to move upward and downward along the first Z-axis guide rail;

[0015] The first magnetic sensor is arranged on the first Z-axis movement member.

[0016] The battery non-destructive testing instrument further includes:

[0017] A temperature sensor arranged on the first Z-axis movement member, the temperature sensor detects the temperature of the battery placed on the workbench and outputs a temperature result.

[0018] The battery non-destructive testing instrument further includes:

[0019] A thermostat arranged on the rack, the first magnetic sensor, the workbench, the first movement mechanism and the temperature sensor are arranged in the thermostat.

[0020] The battery non-destructive testing instrument further includes:

[0021] A displacement sensor arranged on the first Z-axis movement member, the displacement sensor detects the position of the battery placed on the workbench and sends a position instruction to the first movement mechanism according to the detected position of the battery, the first movement mechanism drives the first magnetic sensor to move to the optimal height detection position of the first magnetic sensor.

[0022] The first movement mechanism and the first magnetic sensor are arranged above the workbench.

[0023] The first magnetic sensor is a quantum well Hall effect sensor or a fluxgate sensor.

[0024] The battery non-destructive testing instrument further includes:

[0025] A second magnetic sensor arranged below the workbench and matched with the first magnetic sensor to form a pair of sensors.

[0026] A second motion mechanism is arranged on the frame, and the second magnetic sensor is arranged on the second motion mechanism and moves relative to the frame under the driving of the second motion mechanism.

[0027] The second motion mechanism comprises:

[0028] A second X-axis motion mechanism comprises a second X-axis guide rail fixed on the frame, a second X-axis moving part arranged on the second X-axis guide rail and capable of moving back and forth relative to the second X-axis guide rail, and a second X-axis driving device connected with the second X-axis moving part and driving the second X-axis moving part to move back and forth along the second X-axis guide rail.

[0029] A second Y-axis motion mechanism comprises a second Y-axis guide rail fixed on the second X-axis moving part, a second Y-axis moving part arranged on the second Y-axis guide rail and capable of moving left and right relative to the second Y-axis guide rail, and a second Y-axis driving device connected with the second Y-axis moving part and driving the second Y-axis moving part to move left and right along the second Y-axis guide rail.

[0030] The second magnetic sensor is arranged on the second Y-axis moving part.

[0031] The second magnetic sensor and the second motion mechanism are arranged in the thermostat.

[0032] The battery nondestructive testing instrument further comprises a control panel arranged on the frame.

[0033] The utility model discloses a frame, workbench, first magnetic sensor, first motion mechanism are set up, utilize first motion mechanism drive first magnetic sensor relative frame movement, and first magnetic sensor scans the magnetic field in the battery inside of being placed on workbench and exports scanning result to can place the battery of detection in workbench to carry out the charge and discharge to the battery, utilize first magnetic sensor scanning the magnetic field in the battery inside in the charge and discharge process simultaneously, and export scanning result, and the magnetic field difference that the battery produces is analyzed based on the magnetic field scanned, can feedback the defect existing in the battery, need not destroy the battery, can find the position of the defect existence, and the specific reason of causing the defect is convenient for research and development personnel to find, and thus need not destroy the battery and can detect the defect of the battery. BRIEF DESCRIPTION OF DRAWINGS

[0034] The utility model will be described in detail below in combination with the embodiment and the drawing, wherein:

[0035] Figure 1 It is the structure diagram of battery nondestructive testing instrument of the utility model;

[0036] Figure 2 It is the structure diagram of battery nondestructive testing instrument of the utility model after removing the shell;

[0037] Figure 3 is Figure 2 structure diagram after removing the motion mechanism protection shell;

[0038] Figure 4 is another view structure diagram of the battery nondestructive detector after removing the shell. DETAILED DESCRIPTION

[0039] The specific embodiments of the utility model will be further described below in combination with the drawings:

[0040] Please see Figures 1 to 4 The utility model battery nondestructive detector includes frame 1, workstation 2, first magnetic sensor 3 and first motion mechanism 4. Among them:

[0041] Frame 1 mainly plays the supporting role. In order to protect the parts in the frame, still be provided with shell 11 on the frame. In this specific embodiment, the battery nondestructive detector still includes the control panel 12 for being arranged on the frame, and the control panel 12 is fixed on the shell, and the control of the battery nondestructive detector can be realized by operating the control panel.

[0042] Workstation 2 is arranged on the frame. The workstation is used to place battery 21, and when testing, the positive and negative poles of battery 21 are connected through clamp 22, and the clamp is connected with the charge-discharge device, to realize the charge-discharge of the battery.

[0043] First magnetic sensor 3 is arranged on the frame, and the first magnetic sensor scans the magnetic field inside the battery placed on the workstation and outputs the scanning result. The first magnetic sensor scans the magnetic field inside the battery during the charge-discharge process and outputs the scanning result. Based on the scanned magnetic field, the magnetic field difference generated by the battery can be analyzed, and the defects existing in the battery can be fed back. Without destroying the battery, the position of the defect can be found, which is convenient for the research and development personnel to find the specific reason causing the defect, so that the defect of the battery can be detected without destroying the battery. In this specific embodiment, the first magnetic sensor is a quantum well hall effect sensor or a fluxgate sensor.

[0044] First motion mechanism 4 is arranged on the frame, and the first magnetic sensor is arranged on the first motion mechanism and moves relative to the frame under the drive of the first motion mechanism. The first motion mechanism is used to drive the first magnetic sensor to move relative to the frame, which can be realized by using the existing motor motion mechanism.

[0045] The utility model discloses a rack, workbench, first magnetic sensor, first movement mechanism are set up, utilize first movement mechanism drive first magnetic sensor relative rack movement, and first magnetic sensor scans the magnetic field in the battery inside of placing on the workbench and exports scanning result to can place the battery of detection on the workbench, carries out the charge and discharge to the battery, utilizes first magnetic sensor scanning the magnetic field in the battery inside during charge and discharge simultaneously, and exports scanning result, based on the magnetic field of scanning the magnetic field difference of battery production can feedback the defect existing in the battery, need not destroy the battery, can find the position of defect existence, the specific reason of causing the defect is convenient for research and development personnel to find, thus need not destroy the battery and can detect the defect of battery.

[0046] In the embodiment, the first movement mechanism 4 includes a first X-axis movement mechanism 41, a first Y-axis movement mechanism 42 and a first Z-axis movement mechanism 43.

[0047] The first Y-axis movement mechanism 42 includes a first Y-axis guide rail 421 fixed on the rack, a first Y-axis moving part 422 arranged on the first Y-axis guide rail and capable of moving left and right relative to the first Y-axis guide rail, and a first Y-axis driving device 423 connected with the first Y-axis moving part and driving the first Y-axis moving part to move left and right along the first Y-axis guide rail.

[0048] The first X-axis movement mechanism 41 includes a first X-axis guide rail 411 fixed on the first Y-axis moving part 422, a first X-axis moving part 412 arranged on the first X-axis guide rail and capable of moving forward and backward relative to the first X-axis guide rail, and a first X-axis driving device 413 connected with the first X-axis moving part and driving the first X-axis moving part to move forward and backward along the first X-axis guide rail.

[0049] The first Z-axis movement mechanism 43 includes a first Z-axis guide rail 431 fixed on the first X-axis moving part, a first Z-axis moving part 432 arranged on the first Z-axis guide rail and capable of moving up and down relative to the first Z-axis guide rail, and a first Z-axis driving device 433 connected with the first Z-axis moving part and driving the first Z-axis moving part to move up and down along the first Z-axis guide rail.

[0050] The first X-axis guide rail, the first Y-axis guide rail and the first Z-axis guide rail are all provided with a movement mechanism protection shell 49 to protect the first movement mechanism.

[0051] The first magnetic sensor is arranged on the first Z-axis moving part. The first magnetic sensor can be driven to move up and down, forward and backward, and left and right by the first movement mechanism.

[0052] In the embodiment, in order to associate the temperature of the battery with the result of the magnetic scanning, and better analyze the defects inside the battery, the battery nondestructive testing instrument further comprises a temperature sensor 5 arranged on the first Z-axis moving member, which detects the temperature of the battery placed on the workbench and outputs a temperature result. The temperature sensor is used to detect the temperature of the battery and output the temperature result. By combining the temperature result with the scanning result, the defects inside the battery can be better analyzed.

[0053] In the embodiment, the battery nondestructive testing instrument further comprises a thermostat 6 arranged on the rack, and the first magnetic sensor, the workbench, the first moving mechanism and the temperature sensor are arranged in the thermostat. The thermostat can make the detection be carried out at a proper temperature, which is beneficial to providing high detection accuracy. In addition, the thermostat can provide a specific temperature environment, simulate the working environment of the battery at different temperatures, and detect the change of the internal current with the temperature.

[0054] In the embodiment, the battery nondestructive testing instrument further comprises a displacement sensor 7 arranged on the first Z-axis moving member, which detects the position of the battery placed on the workbench and sends a position instruction to the first moving mechanism according to the detected position of the battery, and the first moving mechanism drives the first magnetic sensor to move to an optimal height detection position of the first magnetic sensor. The displacement sensor is used to detect the height between the battery and the first magnetic sensor, and ensure that the first magnetic sensor works at the optimal height position.

[0055] In the embodiment, the first moving mechanism and the first magnetic sensor are arranged above the workbench.

[0056] In the structural diagram given in the embodiment, the first magnetic sensor is a reflection sensor. At this time, the battery nondestructive testing instrument further comprises a second magnetic sensor 8 and a second moving mechanism 9. Wherein:

[0057] The second magnetic sensor 8 is arranged below the workbench and matched with the first magnetic sensor to form a reflection sensor. That is, the first magnetic sensor and the second magnetic sensor are responsible for transmission and reception respectively.

[0058] The second moving mechanism 9 is arranged on the rack, and the second magnetic sensor is arranged on the second moving mechanism and moves relative to the rack under the drive of the second moving mechanism. The second moving mechanism can drive the second magnetic sensor to move to a proper position below the battery.

[0059] When the first magnetic sensor is a reflection sensor, that is, the first magnetic sensor is responsible for transmission and reception. At this time, the second magnetic sensor and the second moving mechanism are not needed.

[0060] In the embodiment, the second motion mechanism 9 comprises a second X-axis motion mechanism 91 and a second Y-axis motion mechanism 92.

[0061] The second X-axis motion mechanism 91 comprises a second X-axis guide rail 911 fixed on the frame, a second X-axis motion piece 912 arranged on the second X-axis guide rail and capable of moving back and forth relative to the second X-axis guide rail, and a second X-axis driving device 913 connected with the second X-axis motion piece and driving the second X-axis motion piece to move back and forth along the second X-axis guide rail.

[0062] The second Y-axis motion mechanism 92 comprises a second Y-axis guide rail 921 fixed on the second X-axis motion piece, a second Y-axis motion piece 922 arranged on the second Y-axis guide rail and capable of moving left and right relative to the second Y-axis guide rail, and a second Y-axis driving device 923 connected with the second Y-axis motion piece and driving the second Y-axis motion piece to move left and right along the second Y-axis guide rail.

[0063] The second magnetic sensor is arranged on the second Y-axis motion piece; and the second magnetic sensor and the second motion mechanism are arranged in the thermostat.

[0064] The battery is placed in the thermostat body, the upper and lower motion mechanisms are synchronously moved, the quantum well Hall effect sensor is driven, the magnetic field inside the battery is scanned, the scanned magnetic field is spliced and processed through software analysis and calculation, and an image is formed.

[0065] The working principle of the utility model is:

[0066] The battery or the charge and discharge test fixture is placed on the workbench, the battery position is recognized through displacement sensor detection platform height change, the quantum well Hall effect sensor is moved to the best height of quantum well Hall effect sensor work through displacement sensor control first motion mechanism first Z-axis motion mechanism. The second motion mechanism and the first motion mechanism are cooperatively moved to ensure that the positions of the upper and lower quantum well Hall effect sensors are correct, the magnetic field inside the battery is scanned through the movement of the first motion mechanism, the temperature of the battery surface is collected through the temperature sensor, and the images about the magnetic field and the temperature are respectively spliced through software calculation.

[0067] When the reflective sensor is used, the second magnetic sensor and the second motion mechanism are not needed, only the first motion mechanism and the first magnetic sensor are needed, the reflective quantum well Hall effect sensor is used, the battery defects are detected, and the quantum well Hall effect sensors can be arranged into a large module, and the battery can be directly placed on the module for detection.

[0068] The utility model discloses a rack, workbench, first magnetic sensor, first movement mechanism are set up, utilize first movement mechanism drive first magnetic sensor relative rack movement, and first magnetic sensor scans the magnetic field in the battery inside placed on the workbench and exports scanning result to can place the battery of detection on the workbench to the battery carries out charge and discharge, simultaneously utilizes first magnetic sensor scanning the magnetic field in the battery inside in the charge and discharge process, and exports scanning result, and the magnetic field difference that the battery generates can be fed back the defect existing in the battery based on the magnetic field scanned, need not destroy the battery, can find the position of defect existence, and the specific reason of causing the defect is conveniently looked for by research and development personnel, and thus need not destroy the battery and can detect the defect of battery.

[0069] The utility model discloses can detect the following defects of battery:

[0070] 1, battery detection when not electrified: internal structure defect;Such as: breakage, lack angle, scratch etc.;

[0071] 2, battery charge and discharge detection: current distribution, electrolyte infiltration state, dendrite growth, battery charge state etc.

[0072] The above only is the preferred embodiment of the utility model and does not limit the utility model, and any modification, equivalent replacement and improvement etc. in the spirit and principles of the utility model are included in the protection scope of the utility model.

Claims

1. A battery nondestructive testing instrument, comprising a frame and a workbench arranged on the frame, characterized in that: The battery nondestructive detector further comprises: A first magnetic sensor disposed on the rack, the first magnetic sensor scans a magnetic field inside a battery placed on the workbench and outputs a scanning result; A first motion mechanism disposed on the rack, the first magnetic sensor is disposed on the first motion mechanism and moves relative to the rack under the drive of the first motion mechanism.

2. The battery non-destructive testing instrument of claim 1, wherein: The first motion mechanism comprises: A first Y-axis motion mechanism comprising a first Y-axis guide rail fixed on the rack, a first Y-axis moving part disposed on the first Y-axis guide rail and movable left and right relative to the first Y-axis guide rail, and a first Y-axis drive device connected with the first Y-axis moving part and driving the first Y-axis moving part to move left and right along the first Y-axis guide rail; A first X-axis motion mechanism comprising a first X-axis guide rail fixed on the first Y-axis moving part, a first X-axis moving part disposed on the first X-axis guide rail and movable forward and backward relative to the first X-axis guide rail, and a first X-axis drive device connected with the first X-axis moving part and driving the first X-axis moving part to move forward and backward along the first X-axis guide rail; A first Z-axis motion mechanism comprising a first Z-axis guide rail fixed on the first X-axis moving part, a first Z-axis moving part disposed on the first Z-axis guide rail and movable up and down relative to the first Z-axis guide rail, and a first Z-axis drive device connected with the first Z-axis moving part and driving the first Z-axis moving part to move up and down along the first Z-axis guide rail; The first magnetic sensor is disposed on the first Z-axis moving part.

3. The battery non-destructive testing instrument of claim 2, wherein: The battery nondestructive detector further comprises: A temperature sensor disposed on the first Z-axis moving part, the temperature sensor detects the temperature of the battery placed on the workbench and outputs a temperature result.

4. The battery non-destructive testing instrument of claim 3, wherein: The battery nondestructive detector further comprises: An incubator disposed on the rack, the first magnetic sensor, the workbench, the first motion mechanism, and the temperature sensor are all disposed in the incubator.

5. The battery non-destructive testing instrument of claim 2, wherein: The battery nondestructive detector further comprises: A displacement sensor disposed on the first Z-axis moving part, the displacement sensor detects the position of the battery placed on the workbench and sends a position instruction to the first motion mechanism according to the detected position of the battery, the first motion mechanism drives the first magnetic sensor to move to an optimal height detection position of the first magnetic sensor.

6. The battery non-destructive testing instrument of claim 1, wherein: The first motion mechanism and the first magnetic sensor are disposed above the workbench.

7. The battery non-destructive testing instrument of claim 1, wherein: The first magnetic sensor is a quantum well Hall effect sensor or a fluxgate sensor.

8. The battery non-destructive testing instrument of claim 4, wherein: The battery nondestructive detector further comprises: A second magnetic sensor disposed below the workbench and matched with the first magnetic sensor to form a pair of sensors; A second motion mechanism disposed on the rack, the second magnetic sensor is disposed on the second motion mechanism and moves relative to the rack under the drive of the second motion mechanism.

9. The battery non-destructive testing instrument of claim 8, wherein: The second motion mechanism comprises: A second X-axis movement mechanism includes a second X-axis guide rail fixed on the frame, a second X-axis moving part arranged on the second X-axis guide rail and capable of moving forward and backward relative to the second X-axis guide rail, and a second X-axis driving device connected with the second X-axis moving part and driving the second X-axis moving part to move forward and backward along the second X-axis guide rail; A second Y-axis movement mechanism includes a second Y-axis guide rail fixed on the second X-axis moving part, a second Y-axis moving part arranged on the second Y-axis guide rail and capable of moving left and right relative to the second Y-axis guide rail, and a second Y-axis driving device connected with the second Y-axis moving part and driving the second Y-axis moving part to move left and right along the second Y-axis guide rail; The second magnetic sensor is arranged on the second Y-axis moving part; The second magnetic sensor and the second movement mechanism are arranged in the thermostat.

10. The battery non-destructive testing instrument of claim 1, wherein: The battery nondestructive testing instrument further includes a control panel arranged on the frame.

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