CN215728475U

CN215728475U - BMS board testing arrangement and BMS board test system

Info

Publication number: CN215728475U
Application number: CN202120817543.8U
Authority: CN
Inventors: 程昆
Original assignee: Green Energy Battery Co ltd
Current assignee: Green Energy Battery Co ltd
Priority date: 2021-04-20
Filing date: 2021-04-20
Publication date: 2022-02-01
Anticipated expiration: 2031-04-20

Abstract

The utility model discloses a BMS board testing device and a BMS board testing system. Thereby the convenience of BMS board outgoing test has been improved.

Description

BMS board testing arrangement and BMS board test system

Technical Field

The utility model relates to the technical field of BMS board testing, in particular to a BMS board testing device and a BMS board testing system.

Background

BMS board need detect data such as monomer voltage, temperature, SOC, analog signal and judge when leaving the factory, and traditional test method needs artifical manual connecting device to test again for every signal of testing, and the time of cost is long to the data of test need artifical record, the error appears easily, is difficult to carry out data and traces back, is unfavorable for improving the BMS board convenience of leaving the factory and testing.

SUMMERY OF THE UTILITY MODEL

The utility model mainly aims to provide a BMS board testing device and a BMS board testing system. The BMS board delivery test device aims at improving the convenience of BMS board delivery tests.

In order to accomplish the above object, the BMS board testing device includes:

simulating a battery pack;

a test board;

the BMS testing tool is provided with a mounting position for mounting a BMS board to be tested, and the mounting position of the BMS testing tool is electrically connected with the testing board and the simulation battery pack respectively;

when the BMS board to be tested is tested, the testing board tests the BMS board to be tested according to the received trigger signal, so that when the BMS board to be tested is in communication connection with an external terminal, testing result information is output to the external terminal.

Optionally, the test plate comprises:

the power supply input end is used for connecting a first voltage;

the main control circuit is provided with a trigger signal input end and a charging wake-up signal output end, and the trigger signal input end of the main control circuit is used for receiving the trigger signal;

the controlled end of the charging wake-up circuit is connected with the charging wake-up signal output end of the main control circuit, the input end of the charging wake-up circuit is connected with the power supply input end, and the output end of the charging wake-up circuit is electrically connected with the installation position of the BMS test tool;

the main control circuit is used for controlling the charging wake-up circuit to conduct a path between the power supply input end and the charging wake-up circuit output end according to the trigger signal so as to output a first voltage to the BMS test tool;

the BMS testing tool is used for receiving the first voltage when the BMS board to be tested is tested, and outputting the first voltage to the simulation battery pack through the BMS board to be tested, so that the BMS board to be tested detects the charging parameter information of the simulation battery pack and outputs the charging parameter information to an external terminal.

Optionally, the test plate further comprises:

the output end of the temperature detection circuit is electrically connected with the mounting position of the BMS test tool; the temperature detection circuit is used for detecting the temperature of the analog battery pack and outputting a temperature detection signal;

and the BMS testing tool is used for receiving the temperature detection signal and outputting the temperature detection signal to the BMS board to be tested when the BMS board to be tested is tested, so that the BMS board to be tested outputs the temperature detection signal to the external terminal.

Optionally, the main control circuit further has a communication transmission end, and the test board further includes:

the communication circuit is provided with a transmission end and a trigger signal output end, the trigger signal output end of the communication circuit is connected with the trigger signal input end of the main control circuit, the transmission end of the communication circuit is connected with the communication transmission end of the main control circuit, and the communication circuit is in communication connection with the external terminal;

the communication circuit is used for receiving the trigger signal output by the external terminal and outputting the trigger signal to the trigger signal input end of the main control circuit.

Optionally, the communication circuit is a CAN communication circuit, the CAN communication circuit has a connection end, and the connection end of the CAN communication circuit is connected with the external terminal in a wired communication manner.

Optionally, the communication circuit is a wireless communication circuit, and the wireless communication circuit is wirelessly connected to the external terminal.

Optionally, the main control circuit further has a voltage input terminal, and the test board further includes:

the detection end of the voltage detection circuit is electrically connected with the installation position of the BMS test tool, and the output end of the voltage detection circuit is connected with the voltage input end of the main control circuit;

the BMS testing tool is used for outputting the battery voltage output by the simulation battery pack to the BMS board to be tested so that the BMS board to be tested converts the battery voltage into a detection voltage and outputs the detection voltage;

the voltage detection circuit is used for receiving the detection voltage, detecting the voltage value of the detection voltage and outputting a voltage value detection signal;

and the main control circuit is used for receiving the voltage value detection signal and outputting the voltage value detection signal to an external terminal through the communication circuit.

Optionally, the main control circuit further has a power source terminal, and the test board further includes:

the input end of the power management circuit is connected with the power input end, and the power end of the main control circuit and the power end of the communication circuit are respectively connected with the output end of the power management circuit and used for outputting the first voltage after voltage conversion so as to provide working voltage for the main control circuit and the communication circuit.

Optionally, the BMS board testing device further includes:

the BMS testing tool is arranged on the shell and forms an accommodating cavity with the shell in an enclosing manner;

the simulation battery pack and the test board are accommodated in the accommodating cavity;

one side of the shell is provided with a wire harness hole, and the installation position of the BMS test tool penetrates through the wire harness hole through a wire harness to be respectively and electrically connected with the test board and the simulation battery pack.

The utility model also provides a BMS board testing system which comprises an upper computer and the BMS board testing device.

The BMS board testing device is used for carrying the BMS board by arranging the BMS testing tool and is respectively and electrically connected with the testing board and the simulation battery pack. In the testing process, the BMS board to be tested is placed into the mounting position of the BMS testing tool and fixed, and the BMS board to be tested is electrically connected with the simulation battery and the testing board through the mounting position respectively. And then, the test board starts to test the BMS board to be tested according to the received trigger signal, and the BMS board to be tested can establish communication connection with an external terminal and output test result information to the external terminal. The utility model realizes the delivery self-test of the BMS board to be tested, saves the test result information through the external terminal and judges whether the BMS board to be tested meets the delivery standard, thereby not needing to test each BMS board to be tested by handheld detection equipment and improving the convenience of the delivery test of the BMS board. Meanwhile, the external terminal stores and judges the test data, so that the interference of manual recording and manual judgment can be effectively eliminated, the test result information can be traced, and the detection efficiency of the BMS board to be detected is improved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings can be obtained according to the structures shown in the drawings without creative efforts for those skilled in the art.

Fig. 1 is a schematic circuit configuration diagram of a BMS board testing device of the present invention;

fig. 2 is a schematic circuit configuration diagram of another embodiment of the BMS board testing device of the present invention;

fig. 3 is a schematic circuit configuration diagram of a BMS board testing device according to still another embodiment of the present invention;

fig. 4 is a schematic circuit diagram of a BMS board testing device according to still another embodiment of the present invention;

fig. 5 is a schematic structural view of an embodiment of a BMS board testing device of the present invention.

The reference numbers illustrate:

reference numerals	Name (R)	Reference numerals	Name (R)
				10	Analog battery pack	20	Test board
30	BMS test fixture	21	Master control circuit
				22	Charging wake-up circuit	23	Temperature detection circuit
24	Communication circuit	25	Voltage detection circuit
				40	Shell body	41	The upper surface of the shell
42	One side of the shell	421	Wire harness hole
				50	Power management circuit

The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that, if directional indications (such as up, down, left, right, front, and back) are involved in the embodiment of the present invention, the directional indications are only used to explain the relative position relationship between the components, the motion situation, and the like in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indications are changed accordingly.

In addition, if there is a description of designing "first", "second", etc. in an embodiment of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, an element defined as "a first" or "a second" can include at least one of the element either explicitly or implicitly. In addition, the technical solutions in the embodiments may be combined with each other, but must be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is no longer within the protection scope of the present invention.

In order to improve the convenience of the factory test of the BMS board, the utility model provides a BMS board testing device.

Referring to fig. 1, in an embodiment of the present invention, the BMS board testing device includes an analog battery pack 10, a testing board 20, and a BMS testing fixture 30, the BMS testing fixture 30 having mounting sites for mounting the BMS board to be tested, the mounting sites of the BMS testing fixture 30 being electrically connected to the testing board 20 and the analog battery pack 10, respectively.

Wherein, when testing the BMS board to be tested, survey test panel 20 and test the BMS board to be tested according to the trigger signal who receives, the BMS board to be tested is connected with external terminal communication to with test result information output to external terminal.

A BMS (Battery Management System) board, which may be used to manage and monitor the Battery, for example: battery parameter measurement, battery state estimation, fault detection, fault handling, charge control, battery equalization, voltage conversion, and information storage and communication, among others. In the design process of the BMS board, a plurality of test terminals, such as test pads, etc., are often disposed on the BMS board, which is not limited herein. A plurality of test ends are connected with a plurality of functional module one-to-one of battery management system electricity to be convenient for carry out the test of dispatching from the factory to the BMS board.

The BMS testing fixture 30 may be provided with mounting sites for fixing the BMS board to be tested, such as mounting grooves, snaps, guide rails, etc., without being limited thereto. Using the mounting groove as an example, the size adaptation of the size of mounting groove can with the BMS board that awaits measuring to the fixed BMS board that awaits measuring can set up the electric connection end in the mounting groove corresponding a plurality of test end positions on the BMS board that awaits measuring, for example metal probe etc. and through the connecting wire of being connected with the electric connection end, for example pencil, winding displacement etc. with a plurality of test ends on the BMS board that awaits measuring are connected with a plurality of sense terminals one-to-one of positive and negative ends of simulation group battery 10 and test panel 20 respectively. So, when testing, need not the plug between simulation group battery 10, survey test panel 20 and the BMS test fixture 30, only need place the BMS board that awaits measuring on BMS test fixture 30, carry out functional test to the BMS board that awaits measuring, take out this BMS board that awaits measuring after accomplishing the test, carry out the functional test of next BMS board that awaits measuring again. The analog battery pack 10 may be implemented by using a plurality of battery cells, the plurality of battery cells may be connected in series, in parallel, or in combination of series and parallel to form one analog battery pack 10, and the voltage value of each battery cell in the analog battery pack 10 may be different or the same. The test board 20 may be provided with a main control circuit and a plurality of test circuits for controlling the plurality of test circuits to test the BMS board to be tested according to the received trigger signal, such as a temperature test circuit, a charging test circuit, a voltage conversion test circuit, and the like. The trigger signal may be provided by an external terminal and output to the main control circuit by setting a communication circuit, or a trigger button may be provided on the test board 20 and connected to the main control circuit, and a button signal may be output as the trigger signal by a tester pressing the button. In another embodiment, the BMS board may further be provided with a communication circuit for establishing a communication connection with an external terminal through a communication network, such as CAN, 4G/5G, WIFI, bluetooth, and the like, so as to select a corresponding test item according to the test requirements of the external terminal for different BMS boards. In the testing process to the BMS board that awaits measuring, the BMS board that awaits measuring can upload test result information to external terminal, makes external terminal compare test result information and preset qualification value to judge whether the function of BMS board that awaits measuring is normal, preset qualification value is according to the demand setting of dispatching from the factory. Meanwhile, the external terminal stores the test result information uploaded from the BMS board to be tested so as to facilitate subsequent inspection and summarization.

The BMS board testing device of the present invention is used to mount the BMS board by providing the BMS testing fixture 30 and is electrically connected to the testing board 20 and the analog battery pack 10, respectively. In the testing process, the BMS board to be tested is firstly placed in the mounting position of the BMS testing tool 30 and fixed, and is respectively and electrically connected with the simulation battery and the testing board 20 through the mounting position. Then, the test board 20 starts to test the BMS board to be tested according to the received trigger signal, and the BMS board to be tested establishes a communication connection with the external terminal and outputs test result information to the external terminal. The utility model realizes the delivery self-test of the BMS board to be tested, saves the test result information through the external terminal and judges whether the BMS board to be tested meets the delivery standard, thereby testing each BMS board to be tested without holding detection equipment such as a universal meter, a thermometer and the like, and improving the convenience of the delivery test of the BMS board. Meanwhile, the external terminal stores and judges the test data, so that the interference of manual recording and manual judgment can be effectively eliminated, the test result information can be traced, and the detection efficiency of the BMS board to be detected is improved.

Referring to fig. 2, in an embodiment of the present invention, the test board 20 includes a power input terminal, a main control circuit 21 and a charging wake-up circuit 22, the main control circuit 21 has a trigger signal input terminal and a charging wake-up signal output terminal, the trigger signal input terminal of the main control circuit 21 is configured to receive a trigger signal, the controlled terminal of the charging wake-up circuit 22 is connected to the charging wake-up signal output terminal of the main control circuit 21, the input terminal of the charging wake-up circuit 22 is connected to the power input terminal, and the output terminal of the charging wake-up circuit 22 is electrically connected to the mounting location of the BMS testing fixture 30.

The main control circuit 21 is configured to control the charging wake-up circuit 22 to turn on a path between the power input terminal and the output terminal of the charging wake-up circuit 22 according to the trigger signal, so as to output a first voltage to the BMS testing tool 30. The BMS testing tool 30 is used for receiving the first voltage when testing the BMS board to be tested, and outputting the first voltage to the analog battery pack 10 through the BMS board to be tested, so that the BMS board to be tested detects the charging parameter information of the analog battery pack 10 and outputs the charging parameter information to the external terminal.

Specifically, master control circuit 21 includes main control unit U1, first opto-coupler G1 and first resistance R1, main control unit U1 is MCU, main control unit U1 has trigger signal input pin CFI and the awakening signal output pin CKO that charges, first end and the second end of first resistance R1 of first opto-coupler G1 are connected, the second end ground connection of first opto-coupler G1, the fourth end and the first voltage V1 of first opto-coupler G1 are connected, first end and the awakening signal output pin CKO that charges of first resistance R1 are connected. The BMS board has a function of managing charging of the battery pack and is awakened to operate by the accessed voltage. When the main controller U1 receives the trigger signal through the trigger signal input pin CFI, the trigger signal may be received from an external terminal and transmitted to the main controller U1 through the setting communication circuit 24, or the trigger signal may be output to the trigger signal input pin CFI of the main controller U1 through a key by setting the key circuit. Trigger signal can be high level signal or low level signal, main control unit U1 receives behind the trigger signal, through the awakening signal output pin CKO output high level signal that charges, produce the electric current between first end and the second end of first opto-coupler G1, then the route between fourth end and the third end switches on, thereby export the first voltage V1 that power input end inserts to the BMS board that awaits measuring, the BMS board that awaits measuring can be awakened the work, and carry out output to simulation group battery 10 after the voltage conversion with first voltage V1 in order to regard as charging voltage, the BMS board can be through current battery voltage simultaneously, charging voltage and charging current are uploaded to external terminal as charging parameter information, external terminal preserves charging parameter information and can differentiate whether the BMS board that awaits measuring normally works.

Through charging wake-up circuit 22, can realize the self-service detection to the BMS board charge management function that awaits measuring, need not additionally through manual access DC power supply and through the current charging voltage value of artifical record and charging current value in order to judge whether the BMS board normally works to improve the convenience of test, reduced the possibility of misdetection. Simultaneously, the charging wake-up circuit 22 is formed by the optical coupler, so that the first voltage can be isolated and output, the high-level first voltage and the low-level working main controller are realized, the working safety of other circuits on the test board 20 is improved, and the working stability of the whole BMS test device is improved.

Alternatively, the main controller U1 may be any one of a DSP (Digital Signal processor) and an FPGA (Field Programmable Gate Array), and in actual use, may be selected according to actual requirements, which is not limited herein.

Referring to fig. 3, in an embodiment of the present invention, the testing board 20 further includes a temperature detecting circuit 23, and an output terminal of the temperature detecting circuit 23 is electrically connected to a mounting position of the BMS testing fixture 30.

The BMS test tool 30 is used for receiving the temperature detection signal when testing the BMS board to be tested and outputting the temperature detection signal to the BMS board to be tested, so that the BMS board to be tested outputs the temperature detection signal to an external terminal.

Specifically, the temperature sensing circuit 23 includes a third resistor R3 and a temperature sensing resistor NTC1, a second terminal of the temperature sensing resistor NTC1 is connected to the first voltage V1, a first terminal of the third resistor R3 is grounded, and a second terminal of the third resistor R3 and a second terminal of the temperature sensing resistor NTC1 are electrically connected to the mounting location of the BMS testing device, respectively. BMS board has the function that the temperature detected, if need test the temperature detection function, need be for the external temperature detection circuit 23 of BMS board that awaits measuring, is provided with the treater equally on the BMS board that awaits measuring, and the temperature detection input of the treater of BMS board that awaits measuring is connected with the temperature detection input WD-BMS of installation position, and the temperature detection input of installation position is held, the second of temperature detection resistance NTC1 is held the electricity with third resistance R3's second respectively and is connected. The temperature detection resistor NTC1 can change its resistance according to the temperature change, for example, the resistance value is 10K at 25 ℃, the specific resistance-temperature change curve is determined according to the selection of the temperature detection resistor, the processor of the BMS board to be tested obtains the voltage division resistance value of the temperature detection resistor NTC1 and the third resistor R3 for the first voltage V1 through the temperature detection input WD-BMS of the installation site, the resistance value of the current temperature detection resistor NTC1 can be obtained according to the voltage value detected by the processor, and then the current temperature value is obtained according to the resistance-temperature change curve. In summary, when the BMS board to be tested starts to be tested, the BMS board to be tested obtains the temperature value of the current analog battery pack 10 through the temperature detecting resistor NTC1 and the third resistor R3, and uploads the temperature value to the external terminal through wired communication or wireless communication to store the temperature value and determine whether the BMS board to be tested has a temperature detection failure.

Through adopting temperature detection resistance, can realize the test to the temperature detection function of BMS board that awaits measuring, temperature detection resistance simple structure easily realizes simultaneously, is favorable to the wide application in BMS testing arrangement's survey test panel 20 design to be favorable to dwindling the PCB plate body volume of surveying test panel 20, reduction in production cost and later maintenance's cost simultaneously.

Optionally, in addition to using the NTC resistor for temperature detection, a temperature sensor such as an infrared temperature measurement circuit and a thermocouple sensor may also be used.

Referring to fig. 4, in an embodiment of the utility model, the main control circuit 21 further has a communication transmission terminal, the test board 20 further includes a communication circuit 24, the communication circuit 24 has a transmission terminal and a trigger signal output terminal, the trigger signal output terminal of the communication circuit 24 is connected to the trigger signal input terminal of the main control circuit 21, the transmission terminal of the communication circuit 24 is connected to the trigger signal input terminal of the main control circuit 21, and the communication circuit 24 is in communication connection with an external terminal.

The communication circuit 24 is configured to receive a trigger signal output by an external terminal, and output the trigger signal to a trigger signal input terminal of the main control circuit 21.

Specifically, the communication circuit 24 includes a communication chip U2 and is connected to an external terminal in a wired communication manner, the communication chip U2 has a trigger signal output pin CFO, a transmission pin CS and an output pin ZD, the main controller U1 of the main control circuit 21 is an MCU, the communication chip U1 further has a trigger signal input pin CFI and a communication transmission pin DATA, the communication transmission pin DATA is connected to the transmission pin CS, and the trigger signal input pin CFI is connected to the trigger signal output pin CFO. The communication chip U2 may be a CAN communication chip, an ethernet communication chip, an RS485 communication chip, etc., and outputs the signal output by the main controller U1 to an external terminal corresponding to a communication bus protocol after performing signal processing according to the corresponding protocol, or may receive the signal of the external terminal and convert the signal into a signal that CAN be recognized by the main controller U1 after performing signal processing, such as an I2C signal, a USART signal, or a serial signal. After BMS board test work's installation position is put into to the BMS board that awaits measuring and is fixed, can export trigger signal through external terminal, carry out signal processing through communication chip U2 and export to main control unit U1 after, trigger signal can be high level signal or low level signal, main control unit U1 receives behind the trigger signal, can begin to test the BMS board that awaits measuring, and can detect the voltage of BMS board conversion output rethread communication chip U2 and export the test result to external terminal.

Through the communication chip U2 and the external terminal wired thereto, test result information of the BMS board to be tested, for example, a voltage that the BMS board to be tested converts to output, can be saved, and the test result information is judged to confirm whether the BMS board to be tested has a fault. Meanwhile, the PCB test board can also provide a trigger signal, so that a trigger key does not need to be additionally arranged, the volume of the PCB of the test board 20 is reduced, and the production cost is reduced. In addition, through wired connection, the stability and reliability of test result information transmission can be ensured, and errors of the test result information are reduced.

In another embodiment, in addition to using wired communication, a wireless communication connection between the test board 20 and an external terminal can be established through, for example, a bluetooth communication chip, a lan communication chip, a WIFI communication chip, a 4G/5G communication chip, etc., similar to wired communication. Similarly, the communication chip U2 receives and processes the trigger signal of the external terminal and transmits the processed trigger signal to the main controller U1, and the main controller U1 can wirelessly transmit part of the test result information to the external terminal through the communication chip U2.

Through communication chip U2 and rather than wireless communication connection's external terminal, can realize teletransmission test result information, be favorable to a plurality of BMS board testing arrangement during operation together, reduce the quantity of external terminal to at the in-process of actual test, reduced area, improved the efficiency that test result information was preserved and was differentiated.

Referring to fig. 4, in an embodiment of the present invention, the main control circuit 21 further has a voltage input terminal, the test board 20 further includes a voltage detection circuit 25, a detection terminal of the voltage detection circuit 25 is electrically connected to the mounting position of the BMS test fixture 30, and an output terminal of the voltage detection circuit 25 is connected to the voltage input terminal of the main control circuit 21.

The BMS testing tool 30 is configured to output the battery voltage output by the analog battery pack 10 to a BMS board to be tested, so that the BMS board to be tested converts the battery voltage into a detection voltage and outputs the detection voltage, the voltage detection circuit 25 is configured to receive the detection voltage and detect a voltage value of the detection voltage and output a voltage value detection signal, and the main control circuit 21 is configured to receive the voltage value detection signal and output the voltage value detection signal to an external terminal through the communication circuit 24. The main control circuit 21 is used for detecting the voltage value of the detection voltage through the voltage detection circuit 25 and outputting a voltage value detection signal to an external terminal through the communication circuit 24.

Specifically, the voltage detection circuit 25 comprises a second resistor R2, a fourth resistor R4, a fifth resistor R5, a sixth resistor R6, a seventh resistor R7, an eighth resistor R8, a main control chip U1 comprises a first voltage input pin VT-1, the second end of the second resistor R2 and the first end of the fourth resistor R4 are respectively connected with the first voltage input pin VT-1, the second end of the fifth resistor R5 and the first end of the sixth resistor are respectively connected with the second voltage input pin VT-2, the second end of the seventh resistor and the first end of the eighth resistor are respectively connected with the third voltage input pin VT-3, the second end of the fourth resistor R4, the second end of the sixth resistor and the second end of the eighth resistor are all grounded, and the first end of the second resistor R2, the first end of the fifth resistor R5 and the first end of the seventh resistor R7 are respectively and electrically connected with the mounting position of the BMS test fixture 30.

The BMS board may convert the voltage of the battery of the analog battery pack 10 to output different voltage values, for example, 12V, 5V, 3.3V, etc., and may be specifically configured according to practical applications, which is not limited herein. The voltage conversion function of the BMS board, which includes the first voltage output terminal BMS-VO1, the second voltage output terminal BMS-VO2, and the third voltage output terminal BMS-VO3, needs to be tested. The three voltage output ends of the BMS board mounting position are electrically connected with the three input ends of the voltage detection circuit 25 on the test board 20 in a one-to-one correspondence manner, BMS-VO1 is connected with the first end of the second resistor R2, BMS-VO2 is connected with the first end of the fifth resistor R5, and BMS-VO3 is connected with the first end of the seventh resistor R7. The main controller U1 of the main control circuit 21 on the test board 20 is an MCU, the first voltage input pin VT-1, the second voltage input pin VT-2 and the third voltage input pin VT-3 of the U1 are ADC IO ports, which can detect voltage values, and at the same time, the U1 has a processing module to perform operations. Taking BMS-VO1 as an example, the BMS board to be tested outputs 12V conversion voltage during the test, and outputs the voltage to the first end of the second resistor R2 on the test board 20 through BMS-VO1 on the mounting position, the main controller U1 detects the voltage value divided by the second resistor R2 and the fourth resistor R4 through the first voltage input pin VT-1, and then calculates the voltage value output by the BMS-VO1 during the test according to the voltage values of the second resistor R2 and the fourth resistor R4, and uploads the voltage value to the external terminal through the communication circuit 24. And the external terminal judges and stores the voltage value, and determines whether the BMS board to be tested converts and outputs the fault and records the fault. Thereby realizing the test of the voltage conversion function of the BMS board.

Detect the voltage of awaiting measuring BMS board output in the testing process through adopting resistance partial pressure, simple structure easily realizes, is favorable to the wide application in BMS testing arrangement's survey test panel 20 design to be favorable to dwindling the PCB plate body volume of surveying test panel 20, reduction in production cost and later maintenance's cost simultaneously.

Referring to fig. 4, in an embodiment of the utility model, the main control circuit 21 further has a power supply terminal, the test board 20 further includes a power management circuit, an input terminal of the power management circuit is connected to the power input terminal, and the power supply terminal of the main control circuit 21 is connected to an output terminal of the power management circuit.

The power management circuit is configured to perform voltage conversion on the first voltage and output the first voltage, so as to provide a working voltage for the main control circuit 21.

The power management circuit 50 may include a Low Dropout Regulator U3, i.e., an LDO chip (Low Dropout Regulator), a first capacitor C1 and a second capacitor C2, wherein a first terminal and a power input terminal of the C1 are respectively connected to a first pin of the U3, first terminals of power pins VCC and C2 of the main controller U1 are connected to a third pin of the U3, and second terminals of the C1 and C2 and a second pin of the U3 are all grounded. The U3 converts the first voltage V1 inputted from the power input terminal into a working voltage V2 suitable for driving the main controller U1 of the main control circuit 2121, for example, converts the 12V voltage inputted from the power input terminal into a voltage of 3.3V.

In another embodiment, a DC-DC voltage dropping circuit may be further adopted to step down 12V voltage to 5V voltage to provide working voltage for the communication circuit 2424, and then the input terminal of the low dropout linear regulator U3 is connected to the output terminal of the DC-DC voltage dropping circuit, so as to reduce the 5V voltage to 3.3V voltage to provide working voltage for the main controller U1 of the main control circuit 2121. By providing the power management circuit 50, various electronic components with different operating voltages and voltages can be compatible, which is beneficial to improving the compatibility of the test circuit on the test board 20. In addition, through adopting the low dropout linear regulator, the encapsulation is less, and simple structure easily realizes, is favorable to the wide application in BMS testing arrangement's survey test panel 20 design to be favorable to dwindling the PCB plate body volume of surveying test panel 20, reduction in production cost and later maintenance's cost simultaneously.

Optionally, a DC-DC conversion circuit or the like may be used in addition to the low dropout regulator, and in practical use, the DC-DC conversion circuit may be selected according to the requirement, which is not limited herein.

Referring to fig. 5, in an embodiment of the present invention, the BMS testing device further includes a housing 40, and the BMS testing fixture 30 is disposed on the housing, specifically, an upper surface 41 of the housing, and encloses with the housing 40 to form an accommodating chamber. The simulation battery pack 10 and the test board 20 are accommodated in the accommodating cavity, one side 42 of the housing is provided with a wire harness hole 421, and the mounting position of the BMS testing tool 30 is electrically connected with the test board 20 and the simulation battery pack 10 through the wire harness penetrating through the wire harness hole 421.

Wherein, set up on BMS test fixture 30's the installation position and be provided with many metal probes perpendicularly, the position one-to-one of a plurality of pad test points when the position of metal probe and the BMS board access that awaits measuring, when the BMS board access that awaits measuring, the one end of a plurality of metal probes and a plurality of pad test point one-to-one contact and form the electricity and be connected. And a connecting line is welded at the other end of each metal probe, a plurality of connecting lines form a wire harness, a battery line connected with a battery in the wire harness is connected with the analog battery pack 10 through a wire harness hole, and the rest testing lines are connected with corresponding testing points on the testing board 20 through the wire harness holes. Thereby be convenient for be used for dismantling and fixing, improve the efficiency of test.

Wherein, host computer and BMS board testing arrangement communication are connected.

It should be noted that, since the BMS board testing system of the present invention includes all the embodiments of the BMS board testing device, the BMS board testing system of the present invention has all the advantageous effects of the BMS board testing device described above and will not be described herein again.

The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications and equivalents of the technical solutions of the present invention, which are made by using the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.

Claims

1. A BMS board testing device, characterized in that, the BMS board testing device includes:

simulating a battery pack;

a test board;

2. The BMS board testing device of claim 1, wherein the testing board comprises:

the power supply input end is used for connecting a first voltage;

3. The BMS board testing device of claim 2, wherein the test board further comprises:

4. The BMS board testing device of claim 2, wherein the main control circuit further has a communication transmission terminal, the test board further comprising:

5. The BMS board testing device of claim 4, wherein the communication circuit is a CAN communication circuit having a connection terminal, the connection terminal of the CAN communication circuit being in wired communication connection with the external terminal.

6. The BMS board testing device of claim 4, wherein the communication circuit is a wireless communication circuit, the wireless communication circuit being wirelessly connected to the external terminal.

7. The BMS board testing device of claim 4, wherein the master control circuit further has a voltage input, the testing board further comprising:

8. The BMS board testing device of any one of claims 2 to 7, wherein said main control circuit further has a power supply terminal, said test board further comprising:

and the input end of the power management circuit is connected with the power input end, and the power end of the main control circuit is connected with the output end of the power management circuit and used for outputting the first voltage after voltage conversion so as to provide working voltage for the main control circuit.

9. The BMS board testing device of claim 8, further comprising:

10. A BMS board testing system comprising an upper computer and the BMS board testing device according to any one of claims 1 to 9.