Voltage testing device

Abstract

The utility model discloses a voltage testing device, which relates to the field of voltage testing and is provided with a universal meter and a controller. The universal meter can collect the positive side voltage between the positive tab of the battery after secondary packaging and the air bag side aluminum plastic film and the negative side voltage between the negative tab of the battery and the air bag side aluminum plastic film, so that the positive side voltage and the negative side voltage obtained by testing are more reliable; if the controller and the first negative meter hand and the second negative meter hand of the negative meter pen of the universal meter are connected to the preset voltage, the first negative meter hand and the second negative meter hand are both arranged in the air bag edge aluminum plastic film of the battery, so that the accuracy of the placement position of the negative meter hand is ensured, and the measured positive side voltage and negative side voltage are both actual values. Therefore, the accuracy of the positive side voltage and the negative side voltage transmitted to the upper computer is ensured.

Description

Technical Field

[0001] The utility model relates to the field of voltage testing, and particularly relates to a voltage testing device. Background Art

[0002] With the development of the power supply field, soft-pack batteries have become increasingly important, so the voltage detection of soft-pack batteries has also become increasingly important.

[0003] In the prior art, there are two methods for detecting the edge voltage of a soft-pack battery (edge voltage detection refers to the voltage detection between the electrode tab of the battery cell of the soft-pack battery and the aluminum-plastic film of the soft-pack battery). The first method is non-contact detection. As Figure 1 shown, the positive test lead of the multimeter is respectively connected to the positive electrode tab and the negative electrode tab of the battery cell of the soft-pack battery, and the negative test lead senses the voltage at the aluminum-plastic film. The voltage difference between the positive electrode tab and the aluminum-plastic film is used as the positive edge voltage of the soft-pack battery, and the voltage difference between the negative electrode tab and the aluminum-plastic film is used as the negative edge voltage of the soft-pack battery. However, in this detection method, the positive test lead and the negative test lead of the multimeter do not form a loop closed circuit with the soft-pack battery, so the positive edge voltage and the negative edge voltage measured are induction values, and the results are not reliable. The second method is as Figure 2 shown. Before the secondary packaging of the battery cell of the soft-pack battery, it is necessary to expose the metal layer in the air bag of the soft-pack battery shell and electrically connect the metal layer to the electrolyte solution pool, or it can also be immersed in the electrolyte solution pool. At the same time, one end of the electrolyte solution pool is electrically connected to a DC voltage testing device, and the other end of the DC voltage testing device is electrically connected to the electrode tab of the soft-pack battery, so that the soft-pack battery, the electrolyte solution pool, and the DC voltage testing device are electrically connected in sequence to form a closed loop, and the electrolyte solution pool is heated to test the edge voltage. However, because the electrolyte solution is corrosive, it needs to be replaced and added regularly, and heating the electrolyte solution increases manpower, material resources, and energy consumption. In addition, it is not necessary to cut off the air bag of the shell before the secondary packaging of the battery cell, but it is necessary to cut off the air bag of the shell after the secondary packaging. Because it is easy to cut the battery cell when cutting off the air bag of the shell during the secondary packaging process, which may cause the soft-pack battery to short-circuit. For example, if the voltage of the soft-pack battery is measured to be normal by the above method before the secondary packaging, but a part of the battery cell of the soft-pack battery is cut off during the secondary packaging, then the battery after the secondary packaging is short-circuited, and the battery voltage is also abnormal. If the voltage measured before the secondary packaging is still used as the standard, it will cause harm to the actual application. Content of the Utility Model

[0004] The utility model aims to provide a voltage testing device. This scheme tests the positive and negative side voltages of the positive and negative pole ears of a battery and the positive and negative side voltages of the aluminum-plastic film at the air bag side of the battery. Because the tested battery is secondary packaged, the positive side voltage and the negative side voltage obtained by the test are more reliable. In addition, when the controller and the first negative needle and the second negative needle of the multimeter are both connected to the preset voltage, it is proved that the first negative needle and the second negative needle are both located in the aluminum-plastic film at the air bag side, which ensures the accuracy of the placement of the negative needle, so that the measured positive side voltage and negative side voltage are actual values ​​instead of induction values, thereby ensuring the accuracy of the positive side voltage and the negative side voltage measurement.

[0005] In order to solve the above technical problems, the utility model provides a voltage testing device, comprising: a multimeter and a controller;

[0006] The first positive probe of the multimeter is connected to the positive terminal of the battery after secondary packaging, the second positive probe is connected to the negative terminal of the battery, the first end of the first negative probe of the negative probe is connected to a preset voltage, the second end of the first negative probe is located in the aluminum-plastic film at the air bag edge of the battery, and the first end of the second negative probe of the negative probe is located in the aluminum-plastic film at the air bag edge, for collecting the positive side voltage between the first positive probe and the second negative probe and the negative side voltage between the second positive probe and the second negative probe;

[0007] The controller is connected to the second end of the second negative test lead and the host computer respectively, and is used to transmit a contact test success signal to the host computer when the voltage at the second end of the second negative test lead is the preset voltage, so that the host computer reads the positive side voltage and the negative side voltage collected by the multimeter.

[0008] Optionally, also include:

[0009] The host computer is connected to the controller and the MES respectively, and is used to generate a corresponding voltage judgment result based on the positive side voltage and the negative side voltage, and transmit the data packets corresponding to the positive side voltage, the negative side voltage and the voltage judgment result to the MES.

[0010] Optionally, also include:

[0011] The MES is connected to the host computer and is used to store the data packets transmitted by the host computer.

[0012] Optionally, also include:

[0013] A first alarm, which is connected to the host computer and is used to issue a corresponding alarm based on the control of the host computer and the controller when the host computer determines an abnormal situation;

[0014] Among them, the abnormal conditions include at least one of abnormal signal transmission between the controller and the host computer, abnormal signal transmission between the multimeter and the host computer, abnormal voltage acquisition process of the multimeter, abnormal access of the preset voltage, abnormal signal transmission between the MES and the host computer, and abnormal positive and negative voltages.

[0015] Optionally, it further includes:

[0016] An electronic scale, which is arranged under the battery, is connected to the host computer, and is used to detect the weight of the battery and transmit the weight to the host computer;

[0017] The host computer is further used to: obtain the weight of the battery after liquid injection and the weight of the battery aluminum plastic film air bag transmitted by the MES, and transmit the calculation results of the liquid loss and liquid retention amounts corresponding to the weight of the battery to the MES based on the weight of the battery after liquid injection, the weight of the battery aluminum plastic film air bag, and the weight of the battery.

[0018] Optionally, it further includes:

[0019] A second alarm, which is connected to the host computer and is used to issue a corresponding alarm based on the control of the host computer and the controller when the liquid loss or the liquid retention amount is abnormal.

[0020] Optionally, it further includes:

[0021] A barcode scanner, which is respectively connected to the battery and the host computer, and is used to scan the QR code on the battery after receiving the barcode scanning signal transmitted by the controller through the host computer, and transmit the scanning result to the controller through the host computer after the scanning is completed.

[0022] Optionally, it further includes:

[0023] A third alarm, which is connected to the host computer and is used to issue a corresponding alarm based on the control of the host computer and the controller when the barcode scanning function of the barcode scanner is abnormal or the scanning result is abnormal.

[0024] Optionally, it further includes:

[0025] A signal transmission module, which is respectively connected to the communication interfaces of the host computer, the controller, and the multimeter, and is used to transmit the contact test success signal to the host computer and transmit the positive and negative voltages to the host computer.

[0026] Optionally, the signal transmission module is a switch, which is respectively connected to the communication interfaces of the host computer, the controller, and the multimeter, and is configured to transmit the contact test success signal to the host computer, and transmit the positive-edge voltage and the negative-edge voltage to the host computer.

[0027] The object of the present invention is to provide a voltage testing device, in which a multimeter and a controller are provided. Among them, since the multimeter can collect the positive-edge voltage between the positive terminal ear of the battery after secondary packaging and the aluminum-plastic film on the airbag side, and the negative-edge voltage between the negative terminal ear of the battery and the aluminum-plastic film on the airbag side, the measured positive-edge voltage and negative-edge voltage are more reliable. In addition, if the controller, the first negative meter needle and the second negative meter needle of the negative test lead of the multimeter are all connected to a preset voltage, it proves that the first negative meter needle and the second negative meter needle are both arranged in the aluminum-plastic film on the airbag side of the battery, ensuring the accuracy of the placement position of the negative meter needle. Furthermore, it ensures that the measured positive-edge voltage and negative-edge voltage are both actual values, rather than induced values, and guarantees the accuracy of the positive-edge voltage and negative-edge voltage transmitted to the host computer. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for description in the embodiments or the prior art. Obviously, the drawings in the following description are only the embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained according to the provided drawings.

[0029] Figure 1 Structural diagram of a non-contact voltage detection device provided by the present invention;

[0030] Figure 2 Structural diagram of an electrolyte solution-voltage detection device provided by the present invention;

[0031] Figure 3 Structural schematic diagram of a voltage testing device provided by the present invention;

[0032] Figure 4 Structural schematic diagram of another voltage testing device provided by the present invention;

[0033] Figure 5 Network topology diagram of a voltage testing device provided by the present invention;

[0034] Figure 6 Overall layout diagram of a voltage testing device provided by the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0035] The core of the present utility model is to provide a voltage testing device. This solution measures the positive and negative voltages between the positive and negative electrode tabs of the battery and the positive and negative edges of the aluminum-plastic film on the airbag side of the battery. Since the tested battery is after secondary packaging, the measured positive and negative edge voltages are more reliable. In addition, the first negative test lead and the second negative test lead of the multimeter are located in the aluminum-plastic film on the airbag side, ensuring the accuracy of the placement position of the negative test leads. The measured positive and negative edge voltages are actual values rather than induced values, guaranteeing the accuracy of the measurement of the positive and negative edge voltages.

[0036] To make the objectives, technical solutions, and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Apparently, the described embodiments are some but not all of the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0037] Please refer to Figure 3 , Figure 3 which is a schematic structural diagram of a voltage testing device provided by the present utility model. The voltage testing device includes: a multimeter 1 and a controller 2;

[0038] The first positive test lead of the multimeter 1 is connected to the positive electrode tab of the battery after secondary packaging, and the second positive test lead is connected to the negative electrode tab of the battery. The first end of the first negative test lead of the negative test lead is connected to a preset voltage, and the second end of the first negative test lead is located in the aluminum-plastic film on the airbag side of the battery. The first end of the second negative test lead of the negative test lead is located in the aluminum-plastic film on the airbag side, and is used to collect the positive edge voltage between the first positive test lead and the second negative test lead and the negative edge voltage between the second positive test lead and the second negative test lead;

[0039] The controller 2 is respectively connected to the second end of the second negative test lead and the host computer, and is used to transmit a contact test success signal to the host computer when the voltage at the second end of the second negative test lead is the preset voltage, so that the host computer can read the positive edge voltage and the negative edge voltage collected by the multimeter 1.

[0040] In the present utility model, a multimeter 1 and a controller 2 are provided in the voltage testing device. Since the battery to be tested is secondarily packaged, the positive-edge voltage and the negative-edge voltage obtained by the test are more reliable. Among them, the multimeter 1 can collect the positive-edge voltage between the first positive test lead and the second negative test needle and the negative-edge voltage between the second positive test lead and the second negative test needle, that is, collect the positive-edge voltage between the positive electrode tab of the battery and the aluminum-plastic film on the airbag side and the negative-edge voltage between the negative electrode tab of the battery and the aluminum-plastic film on the airbag side. In addition, the controller 2 also has a contact test function, that is, only when the controller 2, the first negative test needle and the second negative test needle of the multimeter 1 are all connected to a preset voltage, it is ensured that the positions of the first negative test needle and the second negative test needle of the multimeter 1 are both in the aluminum-plastic film on the airbag side. In this way, the positive-edge voltage and the negative-edge voltage measured by the multimeter 1 are actual values rather than induced values. In addition, after successfully connecting to the preset voltage, the controller 2 needs to transmit a contact test success signal to the host computer, so that the host computer can continue to perform the operation of reading the positive-edge voltage and the negative-edge voltage collected by the multimeter 1, ensuring the accuracy of the measurement of the positive-edge voltage and the negative-edge voltage.

[0041] It should be noted that the voltage detection device provided by this solution performs voltage detection after the battery is secondarily packaged, that is, when the battery is completely packaged, the edge voltage test performed at this time is the most reliable. In addition, the normal range of the edge voltage of the battery core is 0V - 1000mV; in the past, only one needle was connected to the negative test lead of the multimeter 1. If the aluminum-plastic film was not pierced (such as Figure 1 the negative test needle C is separated from the airbag side of the aluminum-plastic film), the voltage data measured by the multimeter 1 is the induced voltage, such as Figure 1 the induced voltage between the positive test lead A (the first positive test lead) and the negative test needle C or between the positive test lead B (the second positive test lead) and the negative test needle C in, and its value is also in the range of 0V - 1000mV, and the result is misjudged as OK, resulting in false measurement.

[0042] It should also be noted that the voltage detection device provided by this solution simultaneously has multiple functions such as battery code scanning, positive-edge voltage test, negative-edge voltage test, contact detection, weighing, data acquisition and processing, and uploading to MES (Manufacturing Execution System), improving the production efficiency of the voltage detection device, reducing the labor cost, and reducing costs and increasing efficiency. The host computer processes the collected test data (integrates them into a data packet) and then uploads them to the MES system. The contact detection function is as follows: two needles are connected to the negative test lead of the multimeter. Before performing the edge voltage detection, contact detection is first performed to ensure normal contact of the test leads and the edge voltage measurement value is the true value. Only when there is good contact between the negative test needle C (the first negative test needle) and the airbag side of the aluminum-plastic film; and between the negative test needle D (the second negative test needle) and the airbag side of the aluminum-plastic film (such as Figure 4As shown, a loop is formed between the 0V voltage and the input point of Controller 2 (PLC, Programmable Logic Controller 2), and the signal is input into the PLC, after which the subsequent side voltage measurement value is valid. At this time, the preset voltage is 0V. Since the PLC can function as a diode and there is a 24V voltage input at the anode of the equivalent diode, in order to turn on the PLC, that is, the equivalent diode, it is necessary to make the cathode voltage of the equivalent diode less than 24V. Therefore, 0V is selected as the preset voltage. When both the first negative meter needle and the second negative meter needle are set in the edge of the aluminum-plastic film airbag, the PLC (Controller 2) will determine that the contact test is normal and send a contact test success signal to the host computer, so that the host computer can continue to obtain the positive side voltage and negative side voltage collected by Multimeter 1 and sequentially perform subsequent voltage detection work.

[0043] It should also be noted that since the voltage detection device has multiple functions such as battery code scanning, positive-side voltage testing, negative-side voltage testing, contact detection, weighing, data acquisition and processing, and uploading to MES, the order of each function should be as follows: 1. Battery code scanning: After the host computer receives the code scanning signal transmitted by the controller 2, it transmits the signal to the code scanning gun, so that after the code scanning gun receives the code scanning signal transmitted by the host computer, it scans the QR code on the battery corresponding to the code scanning signal, and after the code scanning is completed, it transmits the corresponding code scanning result to the controller 2 through the host computer; 2. Contact detection: When the controller 2 determines that the code scanning is successful according to the code scanning result, it will control the two negative probes to press down, so that the probes are inserted into the aluminum-plastic film on the side of the airbag, and at the same time, a 0V voltage (preset voltage) is connected through the relay. At this time, the controller 2 will work normally after connecting the preset voltage to determine that the setting positions of the first negative probe and the second negative probe are correct and the contact detection is normal; 3. Positive-side voltage testing and negative-side voltage testing: When the contact detection is normal, the PLC will send a contact test success signal to the host computer, connect the first positive probe and the first negative probe, and at the same time send a positive-side voltage (the voltage between the positive electrode tab of the battery and the aluminum-plastic film on the side of the airbag) test signal to the host computer, so that the host computer reads the value of the multimeter 1 as the positive-side voltage. After that, after the controller 2 receives the positive-side voltage reading completion signal from the host computer, it disconnects the first positive probe and the first negative probe, connects the second positive probe and the second negative probe, and at the same time sends a negative-side voltage (the voltage between the negative electrode tab of the battery and the aluminum-plastic film on the side of the airbag) test signal to the host computer, so that the host computer reads the value of the multimeter 1 as the negative-side voltage; 4. Weighing: The electronic scale measures the weight of the battery after secondary packaging, that is, measures the weight of the battery cell, so that the host computer calculates the liquid loss and liquid retention according to the weight of the battery after injection, the weight of the aluminum-plastic film airbag of the battery, and the weight of the battery obtained from the MES; 5. Data acquisition, processing and uploading to MES: Since the weight of the battery (without liquid) before secondary packaging is known, and the weight of the aluminum-plastic film airbag is known, according to the liquid loss = weight of the battery after injection - weight after secondary packaging - weight of the aluminum-plastic film airbag (these three weights are known), the liquid retention = injection volume (known) - liquid loss. Therefore, the host computer can calculate the liquid loss and liquid retention of the battery. The host computer will also generate data packets corresponding to the positive-side voltage and negative-side voltage detection results, and upload the data packets, liquid loss and liquid retention to the MES, and the MES will store them. When the liquid loss, liquid retention, positive-side voltage and negative-side voltage exceed the set range, the host computer interface will be marked in red or the host computer will send an alarm signal to the display alarm device, so that the display device issues a corresponding display alarm, and at the same time sends an alarm signal to the controller 2. When the controller 2 receives the alarm signal, it controls the sound alarm device (such as a buzzer) to emit a corresponding alarm sound.

[0044] It should also be noted that the network topology diagram of the voltage testing device is as Figure 5As shown in the figure, the barcode scanner and the electronic scale communicate with the host computer through the serial port; the multimeter 1 (DC voltmeter) and the controller 2 (PLC) communicate with the host computer through the switch via Ethernet; finally, the host computer exchanges data with the MES through the wireless Ethernet. In addition, the contact detection forms a loop through the power supply → negative test lead C → negative test lead D → input of the controller 2 (PLC). When the controller 2 (PLC) receives this signal, the side voltage test is valid; otherwise, the side voltage test is invalid and an alarm is prompted.

[0045] This embodiment provides a voltage test device. The voltage test device is provided with a multimeter 1 and a controller 2. Among them, since the multimeter 1 can collect the positive side voltage between the positive electrode tab of the battery after secondary packaging and the aluminum-plastic film on the airbag side, as well as the negative side voltage between the negative electrode tab of the battery and the aluminum-plastic film on the airbag side, the measured positive side voltage and negative side voltage are more reliable. In addition, if the controller 2, the first negative test needle and the second negative test needle of the negative test lead of the multimeter 1 are all connected to a preset voltage, it proves that the first negative test needle and the second negative test needle are both set in the aluminum-plastic film on the airbag side of the battery, ensuring the accuracy of the placement position of the negative test needle. Furthermore, it ensures that the measured positive side voltage and negative side voltage are both actual values rather than induced values, guaranteeing the accuracy of the positive side voltage and negative side voltage transmitted to the host computer.

[0046] As an optional embodiment, it further includes:

[0047] A host computer, which is respectively connected to the controller 2 and the MES, and is used to generate corresponding voltage judgment results based on the positive side voltage and the negative side voltage, and transmit the data packets corresponding to the positive side voltage, the negative side voltage and the voltage judgment results to the MES.

[0048] In the present utility model, a host computer is also provided in the voltage test device. Its function is to read the positive side voltage and the negative side voltage collected by the multimeter 1 based on the control of the controller 2 after receiving the contact test success signal transmitted by the controller 2, and generate data packets corresponding to the positive side voltage, the negative side voltage and the voltage judgment results for transmission to the MES.

[0049] As an optional embodiment, it further includes:

[0050] MES, which is connected to the host computer and is used to store the data packets transmitted by the host computer.

[0051] In the present utility model, an MES is also provided in the voltage test device. The MES can store the data packets transmitted by the host computer, provide data access for the host computer, and perform data management and traceability based on the data.

[0052] As an optional embodiment, it further includes:

[0053] The first alarm, which is connected to the host computer, is used to issue corresponding alarms based on the control of the host computer and the controller 2 when the host computer determines an abnormal situation;

[0054] Among them, the abnormal situation includes at least one of the abnormal signal transmission between the controller 2 and the host computer, the abnormal signal transmission between the multimeter 1 and the host computer, the abnormal voltage acquisition process of the multimeter 1, the abnormal access of the preset voltage, the abnormal signal transmission between the MES and the host computer, and the abnormal positive and negative edge voltages.

[0055] In the present utility model, a first alarm is also provided in the voltage testing device. When at least one of the abnormal signal transmission between the controller 2 and the host computer, the abnormal signal transmission between the multimeter 1 and the host computer, the abnormal voltage acquisition process of the multimeter 1, the abnormal access of the preset voltage, the abnormal signal transmission between the MES and the host computer, and the abnormal positive and negative edge voltages occurs, for example: when abnormal situations such as the needle of the multimeter 1 pressing down abnormally and the contact detection success signal transmission being abnormal occur, the first alarm will issue corresponding alarms based on the control of the host computer and the controller 2, so as to timely remind the user that the current voltage testing device has a fault, facilitating the subsequent timely maintenance of the voltage testing device.

[0056] It should be noted that in actual applications, the specific alarm methods for each of the abnormal signal transmission between the controller 2 and the host computer, the abnormal signal transmission between the multimeter 1 and the host computer, the abnormal voltage acquisition process of the multimeter 1, the abnormal access of the preset voltage, the abnormal signal transmission between the MES and the host computer, and the abnormal positive and negative edge voltages are all different to distinguish different abnormal situations. For example: if the first alarm used is a sound alarm and the sound alarm is a buzzer, the sound timbre, frequency, etc. of the alarms in the above several abnormal situations are all different; similarly, if the first alarm used is a display alarm and the display alarm is an indicator light, the lighting colors of the indicator lights in the above several abnormal situations are all different. For example: when the test result prompt of the host computer is normal, the background of the text prompt is green, and when it is abnormal, the text background is red. And the font size of the prompt text is larger than that of other texts, facilitating the user to view and make a determination in a timely manner according to the result.

[0057] It should also be noted that in actual applications, there is not only an alarm, but also a display device, and the structure is as Figure 6 shown Figure 6The test instrument in this solution is the voltage test device provided by this solution. For example: 1. Scanning code: When the scanning code is OK, the upper computer gives an OK prompt. When the scanning code is NG, the buzzer of the device (alarm) alarms, and the upper computer is marked red and gives a prompt. 2. Contact detection: When the contact detection is OK, the upper computer gives an OK prompt. When the contact detection is NG, the buzzer of the device alarms, and the upper computer is marked red and gives a prompt. 3. Positive and negative side voltage detection: When the side voltage detection is OK, the upper computer gives an OK prompt. When the side voltage detection is NG, the buzzer of the device alarms, and the upper computer is marked red and gives a prompt. 4. Weighing: When the weighing is OK, the upper computer gives an OK prompt. When the weighing is NG, the buzzer of the device alarms, and the upper computer is marked red and gives a prompt. 5. Data upload of the upper computer: When the upload is OK, the upper computer gives an OK prompt. When the upload fails, the buzzer of the device alarms, and the upper computer is marked red and gives a prompt. In addition, the upper computer will generate corresponding error logs when problems occur during the above tests, which is convenient for users to query at any time.

[0058] As an optional embodiment, it further includes:

[0059] An electronic scale, which is arranged under the battery, is connected to the upper computer, and is used to detect the weight of the battery and transmit the weight to the upper computer;

[0060] The upper computer is further used to: obtain the weight after battery injection and the weight of the battery aluminum-plastic film air bag transmitted by the MES, and transmit the calculation results of the liquid loss amount and the liquid retention amount of the battery corresponding to the weight of the battery to the MES based on the weight after battery injection, the weight of the battery aluminum-plastic film air bag and the weight of the battery.

[0061] In the present utility model, an electronic scale is further arranged in the voltage test device. The function of the electronic scale is to measure the weight of the battery. The upper computer will read the battery weight, obtain the weight after battery injection and the weight of the battery aluminum-plastic film air bag transmitted by the MES, and then calculate the liquid loss amount and the liquid retention amount of the battery based on the weight after battery injection, the weight of the battery aluminum-plastic film air bag and the weight of the battery, and then upload the calculation results of the liquid loss amount and the liquid retention amount to the MES, improving the accuracy of the weight test process.

[0062] As an optional embodiment, it further includes:

[0063] A second alarm, which is connected to the upper computer and is used to give corresponding alarms based on the control of the upper computer and the controller 2 when the liquid loss amount or the liquid retention amount is abnormal.

[0064] In the present utility model, a second alarm is further arranged in the voltage test device. When the liquid loss amount or the liquid retention amount is abnormal, the second alarm will give corresponding alarms based on the control of the upper computer and the controller 2, so as to timely remind the user that there is a fault in the weight of the current battery, which is convenient for subsequent timely maintenance of the battery.

[0065] It should be noted that in practical applications, the first alarm, the second alarm, and the third alarm can be either sound alarm devices, or display alarm devices, or both sound alarm devices and display alarm devices. The sound alarm device can be a buzzer, and the display alarm device can be an indicator light, an LED, or other devices. The present application does not make any special limitations in this regard.

[0066] As an optional embodiment, it further includes:

[0067] A barcode scanner, which is respectively connected to the battery and the host computer, and is used for scanning the two-dimensional code on the battery after receiving the barcode scanning signal transmitted by the controller 2 through the host computer, and transmitting the scanning result to the controller 2 through the host computer after the barcode scanning is completed.

[0068] In the present utility model, a barcode scanner is further provided in the voltage testing device. The function of the barcode scanner is to scan the two-dimensional code on the battery after receiving the barcode scanning signal transmitted by the controller 2 through the host computer, and send the scanning result to the controller 2 after the barcode scanning is completed. Then, the controller 2 makes corresponding process control instructions or alarm prompts according to the scanning result. For example, if there are multiple batteries whose voltages need to be measured, at this time, the two-dimensional code of the corresponding battery can be scanned based on the control of the barcode scanning signal. If the barcode scanning is successful, it is convenient for the subsequent voltage detection process.

[0069] As an optional embodiment, it further includes:

[0070] A third alarm, which is connected to the host computer, and is used for issuing corresponding alarms based on the control of the host computer and the controller 2 when the barcode scanning function of the barcode scanner is abnormal or the scanning result is abnormal.

[0071] In the present utility model, a third alarm is further provided in the voltage testing device. When the barcode scanning function of the barcode scanner is abnormal or the scanning result is abnormal, the third alarm will issue corresponding alarms based on the control of the host computer and the controller 2 to timely remind the user that there is a fault in the current barcode scanner, which is convenient for the subsequent timely maintenance of the barcode scanner.

[0072] As an optional embodiment, it further includes:

[0073] A signal transmission module, which is respectively connected to the communication interfaces of the host computer, the controller 2, and the multimeter 1, and is used for transmitting the contact test success signal to the host computer, and transmitting the positive-side voltage and the negative-side voltage to the host computer.

[0074] In the present utility model, a signal transmission module is further provided in the voltage testing device. The signal transmission module can transmit the contact test success signal sent by the controller 2 to the host computer when the controller 2 determines that it has successfully accessed the preset voltage, and transmit the positive-edge voltage and the negative-edge voltage to the host computer, improving the stability and anti-interference ability of the transmission of the voltage signal and the contact test success signal, and thus improving the accuracy of the voltage detection process.

[0075] As an optional embodiment, the signal transmission module is a switch, and the switch is respectively connected to the communication interfaces of the host computer, the controller 2 and the multimeter 1, and is used for transmitting the contact test success signal to the host computer and transmitting the positive-edge voltage and the negative-edge voltage to the host computer.

[0076] In the present utility model, the signal transmission module is a switch, and the switch has flexible port expansion ability, can meet long-distance high-speed transmission, and is easy to install without debugging.

[0077] It should be noted that in this specification, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprising", "including" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "including a..." does not exclude the existence of additional identical elements in the process, method, article or device including the element.

[0078] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present utility model. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present utility model. Therefore, the present utility model will not be limited to these embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A voltage testing device, characterized in that: include: Multimeters and controllers; The first positive probe of the multimeter is connected to the positive terminal of the battery after secondary packaging, the second positive probe is connected to the negative terminal of the battery, the first end of the first negative probe of the negative probe is connected to a preset voltage, the second end of the first negative probe is located in the aluminum-plastic film at the air bag edge of the battery, and the first end of the second negative probe of the negative probe is located in the aluminum-plastic film at the air bag edge, for collecting the positive side voltage between the first positive probe and the second negative probe and the negative side voltage between the second positive probe and the second negative probe; The controller is connected to the second end of the second negative test lead and the host computer respectively, and is used to transmit a contact test success signal to the host computer when the voltage at the second end of the second negative test lead is the preset voltage, so that the host computer reads the positive side voltage and the negative side voltage collected by the multimeter.

2. The voltage testing device according to claim 1, characterized in that: Also includes: The host computer is connected to the controller and the MES respectively, and is used to generate a corresponding voltage judgment result based on the positive side voltage and the negative side voltage, and transmit the data packets corresponding to the positive side voltage, the negative side voltage and the voltage judgment result to the MES.

3. The voltage testing device according to claim 2, characterized in that: Also includes: The MES is connected to the host computer and is used to store the data packets transmitted by the host computer.

4. The voltage testing device according to claim 2, characterized in that: Also includes: A first alarm, which is connected to the host computer and is used to issue a corresponding alarm based on the control of the host computer and the controller when the host computer determines an abnormal situation; Among them, the abnormal conditions include abnormal signal transmission between the controller and the host computer, abnormal signal transmission between the multimeter and the host computer, abnormal voltage acquisition process of the multimeter, abnormal preset voltage access, abnormal signal transmission between the MES and the host computer, and at least one of abnormal positive side voltage and abnormal negative side voltage.

5. The voltage testing device according to claim 2, characterized in that: Also includes: An electronic scale, which is arranged under the battery and connected to the host computer, and is used to detect the weight of the battery and transmit the weight to the host computer; The host computer is also used to: obtain the weight of the battery after liquid injection and the weight of the battery aluminum-plastic film air bag transmitted by the MES, and transmit to the MES the calculation results of the liquid loss and liquid retention amount of the battery corresponding to the weight of the battery based on the weight of the battery after liquid injection, the weight of the battery aluminum-plastic film air bag and the weight of the battery.

6. The voltage testing device according to claim 5, characterized in that: Also includes: A second alarm, which is connected to the host computer and is used to issue a corresponding alarm based on the control of the host computer and the controller when the liquid loss or the liquid retention amount is abnormal.

7. The voltage testing device according to claim 1, characterized in that: Also includes: A barcode scanning gun, which is connected to the battery and the host computer respectively, and is used to scan the QR code on the battery after receiving the scanning signal transmitted by the controller through the host computer, and transmit the scanning result to the controller through the host computer after the scanning is completed.

8. The voltage testing device according to claim 7, characterized in that: Also includes: The third alarm is connected to the host computer and is used to issue a corresponding alarm based on the control of the host computer and the controller when the scanning function of the barcode scanner is abnormal or the scanning result is abnormal.

9. The voltage testing device according to any one of claims 1 to 8, characterized in that: Also includes: A signal transmission module, the signal transmission module is respectively connected to the communication interface of the host computer, the controller and the multimeter, and is used to transmit the contact test success signal to the host computer, and transmit the positive side voltage and the negative side voltage to the host computer.

10. The voltage testing device according to claim 9, characterized in that: The signal transmission module is a switch, which is respectively connected to the communication interfaces of the host computer, the controller and the multimeter, and is used to transmit the contact test success signal to the host computer, and transmit the positive side voltage and the negative side voltage to the host computer.

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