CN220603662U - Battery pack quality detection equipment - Google Patents
Battery pack quality detection equipment Download PDFInfo
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- CN220603662U CN220603662U CN202321840422.0U CN202321840422U CN220603662U CN 220603662 U CN220603662 U CN 220603662U CN 202321840422 U CN202321840422 U CN 202321840422U CN 220603662 U CN220603662 U CN 220603662U
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- battery pack
- system control
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- control unit
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- 238000001514 detection method Methods 0.000 title claims abstract description 28
- 238000012360 testing method Methods 0.000 claims abstract description 30
- 238000004891 communication Methods 0.000 claims abstract description 25
- 238000007599 discharging Methods 0.000 claims abstract description 13
- 230000003068 static effect Effects 0.000 claims abstract description 8
- 238000012544 monitoring process Methods 0.000 claims abstract description 6
- 239000000523 sample Substances 0.000 claims description 3
- 238000007689 inspection Methods 0.000 claims 2
- 238000005070 sampling Methods 0.000 abstract description 4
- 238000004458 analytical method Methods 0.000 abstract description 3
- 238000000034 method Methods 0.000 description 12
- 238000003466 welding Methods 0.000 description 10
- 230000005856 abnormality Effects 0.000 description 3
- 238000013461 design Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 1
- 238000007792 addition Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000007405 data analysis Methods 0.000 description 1
- 238000013480 data collection Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
- 229910001416 lithium ion Inorganic materials 0.000 description 1
- GELKBWJHTRAYNV-UHFFFAOYSA-K lithium iron phosphate Chemical compound [Li+].[Fe+2].[O-]P([O-])([O-])=O GELKBWJHTRAYNV-UHFFFAOYSA-K 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000005476 soldering Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
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Abstract
The utility model discloses a battery pack quality detection device, comprising: the device comprises a shell, a power supply unit, a relay, a discharge resistor, a current acquisition unit, a voltage acquisition unit, a system control unit, a communication unit, a battery pack interface and a starting switch. The battery pack interface is used for electrically connecting a battery pack to be detected; the discharging resistor is electrically connected with the battery pack interface and is used for consuming discharging electric energy; the relay is electrically connected with the power supply unit and the starting switch; the current acquisition unit is connected with the system control unit and acquires current data comprising a discharge loop; the voltage acquisition unit is electrically connected with the product interface and is used for acquiring static pressure difference when the product is accessed and dynamic pressure difference when the product is tested; the communication unit is in communication connection with the system control unit and is used for transmitting the test data to the upper computer. The scheme is used for reliability detection of the battery pack connecting sheet, and the reliability detection of the battery pack connecting sheet is carried out through sampling detection voltage data and current fluctuation monitoring analysis of the battery pack.
Description
Technical Field
The utility model relates to the technical field of battery performance detection, in particular to a battery pack discharge dynamic voltage detection device.
Background
The lithium ion battery core monomers are generally combined together in a series connection and parallel connection mode to form a module, and the module group is formed by welding the pole pieces, so that the welding quality directly determines the electrical property and the safety performance of the battery pack, if the pole pieces cannot be well combined with the battery core pole pieces in the welding process, virtual welding can be caused, the contact resistance of the pole pieces can be increased by the welding, and the consistency of a battery system in the charging and discharging process is poor, thereby influencing the capacity and the energy of the battery pack system, and even the cycle life and the safety performance of the battery pack.
After the current product battery pack is welded and produced, a simple tool for testing is required to be debugged manually, a test product is connected into the anode and the cathode of the test tool, a voltage sampling wire harness is inserted into the product for sampling, then the test tool is started, the maximum dynamic differential pressure value displayed by an instrument during the test is observed, and the test is finished after the tool is counted down. The process detection leads to erroneous judgment, the repair cost is high, the process test data cannot be stored, and the traceability of the product test data is poor; the simple test fixture for the working procedure has poor compatibility; the simple tool cannot detect the upper limit value of the dynamic data in real time, and potential safety hazards exist in use; site limitation, there are site power distribution requirements.
Disclosure of Invention
The present utility model addresses at least one of the shortcomings of the prior art by providing a battery pack quality detection apparatus.
In order to solve the technical problems, the utility model is solved by the following technical scheme:
a battery pack discharge dynamic voltage detection apparatus comprising: the system comprises a power supply unit, a relay, a discharging load resistor, a current acquisition unit, a voltage acquisition unit, a system control unit, a communication unit, a battery pack interface and a starting switch;
the battery pack interface is used for electrically connecting a battery pack to be detected;
the discharging resistor is electrically connected with the battery pack interface and is used for consuming discharging electric energy;
the relay is electrically connected with the power supply unit and the starting switch;
the current acquisition unit is connected with the system control unit and acquires current data comprising a discharge loop;
the voltage acquisition unit is electrically connected with the product interface and is used for acquiring static pressure difference when the product is accessed and dynamic pressure difference when the product is tested;
the communication unit is in communication connection with the system control unit and is used for transmitting the test data to the upper computer.
As a preferred aspect, the relay includes a main relay and a branch relay;
wherein, the main relay is electrically connected with the power supply unit; the branch relays are electrically connected with the main relay, and the number of all the branch relays is matched with that of the discharge resistors.
As a preferable scheme, the discharge resistor is implemented as more than two discharge resistors which are connected in parallel;
the self-locking type switch is matched with the branch relays in number, and each self-locking type switch correspondingly controls the corresponding branch relay to conduct the corresponding discharge resistor loop.
As a preferable scheme, the current acquisition unit comprises a Hall sensor, wherein the Hall sensor is arranged in the discharge loop and is electrically connected with the system control unit, and the Hall sensor acquires current data and transmits the current data to the system control unit.
As a preferred embodiment, the communication unit comprises a CAN communication interface.
As a preferred embodiment, the discharge resistor is embodied as an adjustable resistor.
As a preferable scheme, the device also comprises an exhaust fan which is arranged on the shell and is used for exhausting heat during testing of the detection equipment.
As a preferable scheme, the system further comprises a temperature monitoring probe which is in communication connection with the system control unit.
The system also comprises an alarm unit which is in communication connection with the system control unit.
As a preferred embodiment, the power supply unit includes a built-in power supply battery and a charger electrically connected to the power supply battery.
As a preferred solution, the display screen further includes a display screen, and the display screen displays content including: voltage data and current data.
The beneficial effects are that: the scheme is used for reliability detection of the battery pack connecting sheet, and the reliability detection of the battery pack connecting sheet is carried out through sampling detection voltage data and current fluctuation monitoring analysis of the battery pack. Compared with the prior art, the method greatly improves the detection precision and accuracy.
Drawings
In order to more clearly illustrate the embodiments of the utility model or the technical solutions of the prior art, the drawings which are used in the description of the embodiments or the prior art will be briefly described, it being obvious that the drawings in the description below are only some embodiments of the utility model, and that other drawings can be obtained according to these drawings without inventive faculty for a person skilled in the art.
FIG. 1 is a schematic view of one side of an apparatus;
FIG. 2 is a schematic diagram of another side of the apparatus;
FIG. 3 is a schematic diagram of the front of the device;
fig. 4 is an electrical schematic of the device.
Detailed Description
The present utility model will be described in further detail with reference to the following examples, which are illustrative of the present utility model and are not intended to limit the present utility model thereto.
As shown in fig. 1 to 4, a battery pack discharge dynamic voltage detection apparatus includes: the battery pack comprises a shell 10, a power supply unit, a relay, a discharge resistor 40, a current acquisition unit, a voltage acquisition unit, a system control unit 60, a communication unit, a battery pack interface 80 and a start switch 90.
The battery pack interface is used for electrically connecting a battery pack to be detected;
the discharging resistor is electrically connected with the battery pack interface and is used for consuming discharging electric energy;
the relay is electrically connected with the power supply unit and the starting switch;
the current acquisition unit is connected with the system control unit and acquires current data comprising a discharge loop;
the voltage acquisition unit is electrically connected with the product interface and is used for acquiring static pressure difference when the product is accessed and dynamic pressure difference when the product is tested;
the communication unit is in communication connection with the system control unit and is used for transmitting the test data to the upper computer.
The battery pack connection comprises laser welding connection, locking screw connection, soldering connection, ultrasonic welding connection and the like, and the battery pack connection method is suitable for detecting connection reliability of the battery pack after serial-parallel grouping.
Through configuration current acquisition unit and voltage acquisition unit, realized simultaneously that the module detects after the welding whether welding performance satisfies the function that the product design overflows to and realized that the module detects after the welding whether module static pressure differential, dynamic pressure differential are qualified. Meanwhile, the test data is transmitted to the upper computer through the communication unit, so that the function of uploading the test data to the upper computer for storage and/or subsequent processing is realized.
As a preferred embodiment, the power supply unit is implemented as a built-in lithium iron phosphate battery 20, providing a 12V dc power supply; meanwhile, a lithium battery charger 21 is arranged in the device, and a 220V10A standard substance headband switch fuse socket 22 and a charging switch 23 are arranged in the device shell, so that the charging can be performed, and a power supply unit of the device can be used for repeated charging and discharging. A device power switch 24 is also provided.
The voltage acquisition unit is electrically connected with the product interface and is used for acquiring static pressure difference when the product is accessed and dynamic pressure difference when the product is tested; and the system control unit analyzes the number of battery strings and the voltage difference data among strings, and the battery strings are qualified within a set value range.
The current acquisition unit is implemented as a Hall sensor 50, the Hall sensor 50 is installed in a discharge loop and is electrically connected with the system control unit, and the Hall sensor 50 acquires current data and transmits the current data to the system control unit.
The voltage acquisition unit comprises a power end and an acquisition end, and a plurality of detection ends are respectively connected with the lugs of the battery pack to be detected and used for detecting the voltage of each battery string and each battery pack. Such as the product data collection harness 13 in fig. 1.
As a preferred aspect, the relay includes a main relay 31 and a branch relay 32;
wherein the main relay 31 is electrically connected to the power supply unit; the branch relays 32 are electrically connected to the main relay, and the number of all branch relays 32 is matched with the number of the discharge resistors 40.
As a preferable scheme, the discharge resistor 40 is implemented as more than two discharge resistors connected in parallel;
the self-locking type switch 12 is further included, the number of the self-locking type switches 12 is matched with the number of the branch relays, and each self-locking type switch 12 correspondingly controls the corresponding branch relay to conduct the corresponding discharging resistor loop.
As shown in fig. 1 and 4, three discharge resistors are adopted, each discharge resistor is connected in series with a branch relay, and each branch relay is electrically connected with a self-locking switch.
By pressing the switch button 12 to control the closing of the corresponding branch relays, one, two or three branch relays can be selected to be closed simultaneously, so that the conduction of one, two or three discharge resistor loops is controlled, and the selection of different resistance values is realized.
Similarly, if there is more accurate design requirement on the resistance value of the discharge circuit, more discharge resistors and switches can be provided. As a preferable scheme, the discharge resistor is implemented as an adjustable resistor, the number of the discharge resistors is smaller, and the compatibility is higher.
Preferably, the device further comprises a fan 41 mounted on the housing for exhausting heat during testing of the detection device. The exhaust fans are arranged on one side of the discharge resistors, and at least one exhaust fan is arranged on one side of each discharge resistor.
As a preferred scheme, the device also comprises a temperature monitoring probe which is in communication connection with the system control unit and detects the internal temperature of the device.
As a preferred solution, the device further comprises an alarm unit 51, and the alarm unit 51 is communicatively connected to the system control unit, for example, by using a buzzer, a red light, a green light, a yellow light, etc. The functions of the alarm unit 51 include:
and (3) starting a testing process, wherein an indicator lamp lights up in a green mode when the equipment normally operates, the testing is finished, an indicator lamp lights up in a yellow mode, the current in the testing process exceeds the limit, the temperature in the equipment exceeds the limit, the equipment lights up in a red mode, and a buzzer sounds.
Also includes a display screen 11, the display screen 11 displaying content including: the voltage data and the current data also comprise result data which are judged to have welding problems after being analyzed by the system control unit.
As shown in fig. 1 and 3:
the communication unit comprises a CAN communication interface 70, which CAN be configured on a shell on the back of the equipment, and the CAN communication interface 70 is electrically connected with the system control unit.
The battery pack interface 80 includes a positive interface and a negative interface, and an electrical connection wire is inserted into the battery pack interface 80, and one end of the electrical connection wire is a clamping port and is clamped at a power interface of the battery pack to be detected.
A start button 90 is provided, the start button 90 is connected with a system control unit, and after receiving a start signal of pressing the start button 90, the system control unit controls the main relay to be closed, and starts a discharge test.
The device operates as follows:
(1) and collecting the inter-string voltage of each string of batteries of the tested battery pack during discharge test through an acquisition line on the tool equipment, uploading the total voltage, the differential pressure and the string number data to a system control unit, and analyzing and recording the inter-cell voltage deviation information of the battery pack during discharge.
(2) And monitoring the discharge current of the battery pack through a Hall sensor, and recording and analyzing the current fluctuation information of the discharge loop.
The upper computer performs summarizing analysis on the data acquired in the step (1) and the step (2), combines the upper limit and the lower limit (total voltage, serial number, differential pressure and current) set by people, and then combines the people to set optional judging conditions, and the system automatically judges whether the tested battery pack connecting sheet is connected reliably.
The data analysis mode is as follows: if the resistance value in the discharge loop is fixed, the voltage is fixed, the discharge current is theoretically stable, the Hall sensor transmits the acquired current data to the system control unit, and the connection problem of the battery pack connecting sheet can be judged when the current data fluctuation exceeds the set range.
The synchronous combination system control unit is used for synchronously judging the inter-string voltage difference acquired by the inter-string voltage acquisition line of the battery pack, and if the current fluctuation and the inter-string voltage difference exceed the set ranges, the battery pack connection sheet can be judged to be in a connection failure state.
After the test is finished, the test data transmitted to the system control unit through the CAN communication interface comprises one or more of the following: the method comprises the steps of testing employee work numbers, product bar codes, time and date when testing production, static maximum and minimum differential pressure data (voltage of batteries among strings, maximum and minimum differential values) before testing, total voltage values of battery packs, serial numbers of the battery packs, dynamic differential pressure maximum and minimum values in set time of a testing process, current data in set time and testing judging results. If the abnormality exists, the method also comprises outputting the number of strings where the abnormality exists when the abnormality exists.
In addition, the specific embodiments described in the present specification may differ in terms of parts, shapes of components, names, and the like. All equivalent or simple changes of the structure, characteristics and principle according to the inventive concept are included in the protection scope of the present utility model. Those skilled in the art may make various modifications or additions to the described embodiments or substitutions in a similar manner without departing from the scope of the utility model as defined in the accompanying claims.
Claims (10)
1. A battery pack quality detection apparatus, characterized by comprising: the system comprises a power supply unit, a relay, a discharging load resistor, a current acquisition unit, a voltage acquisition unit, a system control unit, a communication unit, a battery pack interface and a starting switch;
the battery pack interface is used for electrically connecting a battery pack to be detected;
the discharging resistor is electrically connected with the battery pack interface and is used for discharging and consuming electric energy;
the relay is electrically connected with the power supply unit and the starting switch;
the current acquisition unit is connected with the system control unit and acquires current data comprising a discharge loop;
the voltage acquisition unit is electrically connected with the product interface and the system control unit, and is used for acquiring the static pressure difference when the product is accessed and the dynamic pressure difference when the product is tested and transmitting the static pressure difference and the dynamic pressure difference to the system control unit;
the communication unit is in communication connection with the system control unit and is used for transmitting the test data to the upper computer.
2. The battery pack quality detection apparatus according to claim 1, wherein the relay includes a main relay and a branch relay;
wherein, the main relay is electrically connected with the power supply unit; the branch relays are electrically connected with the main relay, and the number of all the branch relays is matched with that of the discharge resistors.
3. The battery pack quality detection apparatus according to claim 2, wherein the discharge resistance is implemented as two or more discharge resistances connected in parallel;
the self-locking type switch is matched with the branch relays in number, and each self-locking type switch correspondingly controls the corresponding branch relay to conduct the corresponding discharge resistor loop.
4. The battery pack quality detection apparatus according to claim 1, wherein the current collection unit includes a hall sensor, the hall sensor is installed in the discharge loop and electrically connected to the system control unit, and the hall sensor collects current data and transmits the current data to the system control unit.
5. The battery pack quality detection apparatus of claim 1, wherein the communication unit comprises a CAN communication interface.
6. The battery pack quality detection apparatus of claim 1, wherein the discharge resistor is implemented as an adjustable resistor.
7. The battery pack quality inspection apparatus according to claim 1, further comprising a fan mounted to the housing for exhausting heat during testing of the inspection apparatus.
8. The battery pack quality detection apparatus according to claim 1, further comprising a temperature monitoring probe communicatively connected to the system control unit;
the system also comprises an alarm unit which is in communication connection with the system control unit.
9. The battery pack quality detection apparatus according to claim 1, wherein the power supply unit includes a built-in power supply battery and a charger electrically connected to the power supply battery.
10. The battery pack quality detection apparatus of claim 1, further comprising a display screen, the display screen displaying content comprising: voltage data and current data.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321840422.0U CN220603662U (en) | 2023-07-12 | 2023-07-12 | Battery pack quality detection equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321840422.0U CN220603662U (en) | 2023-07-12 | 2023-07-12 | Battery pack quality detection equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220603662U true CN220603662U (en) | 2024-03-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321840422.0U Active CN220603662U (en) | 2023-07-12 | 2023-07-12 | Battery pack quality detection equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220603662U (en) |
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2023
- 2023-07-12 CN CN202321840422.0U patent/CN220603662U/en active Active
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