CN112285463A - Testing device and method for lithium battery protection board and storage medium - Google Patents
Testing device and method for lithium battery protection board and storage medium Download PDFInfo
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- CN112285463A CN112285463A CN202011089777.1A CN202011089777A CN112285463A CN 112285463 A CN112285463 A CN 112285463A CN 202011089777 A CN202011089777 A CN 202011089777A CN 112285463 A CN112285463 A CN 112285463A
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- lithium battery
- battery protection
- protection board
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K13/00—Thermometers specially adapted for specific purposes
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/327—Testing of circuit interrupters, switches or circuit-breakers
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
Abstract
The embodiment of the invention provides a testing device and method for a lithium battery protection board and a storage medium, and belongs to the technical field of testing of battery protection boards. The test device includes: the CAN board card is used for acquiring a bus signal sent by the lithium battery protection board; the I/O board card is used for outputting analog signals of the charge and discharge switches to the lithium battery protection board; the resistance board card is used for outputting a resistance signal of the simulation temperature to the lithium battery protection board; the single board card is used for outputting a voltage signal simulating the voltage of the battery to the lithium battery protection board; the upper computer is connected with the lithium battery protection board, the CAN board card, the I/O board card, the resistor board card and the monomer board card and is used for controlling the work of the CAN board card, the I/O board card, the resistor board card and the monomer board card to test the lithium battery protection board. The testing device, the testing method and the storage medium can complete the test of the lithium battery protection board under the condition of avoiding using abnormal equipment.
Description
Technical Field
The invention relates to the technical field of testing of battery protection boards, in particular to a testing device and method of a lithium battery protection board and a storage medium.
Background
The shared electric bicycle enters our life, and the lithium battery protection board is responsible for managing charging and discharging of the battery. In order to verify whether the lithium battery protection board can normally realize charging and discharging; test verification of these logic policies is required.
The current verification means is important to pass real vehicle test and build a test bench with a lithium battery and a charger. The real vehicle test is influenced by the development cycle, and the intervention time is late; and the trapped vehicles cannot be tested and verified in a plurality of testing environments. A test bench with a lithium battery and a charger relates to high voltage and lithium batteries; the limit temperature and the limit temperature test are dangerous, and the personal safety of testers is threatened.
Disclosure of Invention
The invention aims to provide a testing device and a testing method for a lithium battery protection board and a storage medium. The testing device, the testing method and the storage medium can complete the test of the lithium battery protection board under the condition of avoiding using abnormal equipment.
In order to achieve the above object, an embodiment of the present invention provides a test apparatus for a lithium battery protection board, including:
the CAN board card is used for acquiring a bus signal sent by the lithium battery protection board;
the I/O board card is used for outputting analog signals of the charge and discharge switches to the lithium battery protection board;
the resistance board card is used for outputting a resistance signal of the simulation temperature to the lithium battery protection board;
the single board card is used for outputting a voltage signal simulating the voltage of the battery to the lithium battery protection board;
the upper computer is connected with the lithium battery protection board, the CAN board card, the I/O board card, the resistor board card and the monomer board card and is used for controlling the work of the CAN board card, the I/O board card, the resistor board card and the monomer board card to test the lithium battery protection board.
Optionally, the upper computer is configured to:
controlling the resistance board card to output a normal temperature signal to the lithium battery protection board;
controlling the single board card to output a normal voltage signal to the lithium battery protection board;
controlling the I/O board card to output a discharge signal to the lithium battery protection board;
acquiring a CAN bus fault state signal output by the lithium battery protection board through the CAN board card;
judging whether the CAN bus fault state signal is in a fault state;
under the condition that the CAN bus fault state signal is judged to be in a fault state, determining that the lithium battery protection board does not pass the test;
under the condition that the CAN bus fault state signal is judged to be non-fault, the on-off state of the MOS tube of the lithium battery protection board is obtained through the I/O board card;
judging whether the switch state of the MOS tube is closed or not;
determining that the lithium battery protection board passes the test under the condition that the switching state of the MOS tube is judged to be closed;
and under the condition that the switching state of the MOS tube is judged to be off, determining that the lithium battery protection board does not pass the test.
Optionally, the upper computer is configured to:
controlling the resistance board card to output an abnormal temperature signal to the lithium battery protection board;
controlling the single board card to output a normal voltage signal to the lithium battery protection board;
controlling the I/O board card to output a charging signal to the lithium battery protection board;
acquiring a CAN bus fault state signal output by the lithium battery protection board through the CAN board card;
judging whether the CAN bus fault state signal is in a fault state;
under the condition that the CAN bus fault state signal is judged to be in a non-fault state, determining that the lithium battery protection board does not pass the test;
under the condition that the CAN bus fault state signal is judged to be in a fault state, the on-off state of the MOS tube of the lithium battery protection board is obtained through the I/O board card;
judging whether the switch state of the MOS tube is closed or not;
under the condition that the switch state of the MOS tube is judged to be closed, the lithium battery protection board is determined not to pass the test;
and determining that the lithium battery protection board passes the test under the condition that the switching state of the MOS tube is judged to be off.
Optionally, the upper computer is configured to:
controlling the resistance board card to output a normal temperature signal to the lithium battery protection board;
controlling the single board card to output a normal voltage signal to the lithium battery protection board;
controlling the I/O board card to output a charging signal to the lithium battery protection board;
acquiring a CAN bus fault state signal output by the lithium battery protection board through the CAN board card;
judging whether the CAN bus fault state signal is in a fault state;
under the condition that the CAN bus fault state signal is judged to be in a fault state, determining that the lithium battery protection board does not pass the test;
under the condition that the CAN bus fault state signal is judged to be in a non-fault state, the on-off state of the MOS tube of the lithium battery protection board is obtained through the I/O board card;
judging whether the switch state of the MOS tube is closed or not;
determining that the lithium battery protection board passes the test under the condition that the switching state of the MOS tube is judged to be closed;
and under the condition that the switching state of the MOS tube is judged to be off, determining that the lithium battery protection board does not pass the test.
Optionally, the upper computer is configured to:
controlling the resistance board card to output a normal temperature signal to the lithium battery protection board;
controlling the single board card to output an abnormal voltage signal to the lithium battery protection board;
controlling the I/O board card to output a discharge signal to the lithium battery protection board;
acquiring a CAN bus fault state signal output by the lithium battery protection board through the CAN board card;
judging whether the CAN bus fault state signal is in a fault state;
under the condition that the CAN bus fault state signal is judged to be in a non-fault state, determining that the lithium battery protection board does not pass the test;
under the condition that the CAN bus fault state signal is judged to be in a fault state, the on-off state of the MOS tube of the lithium battery protection board is obtained through the I/O board card;
judging whether the switch state of the MOS tube is closed or not;
under the condition that the switch state of the MOS tube is judged to be closed, the lithium battery protection board is determined not to pass the test;
and determining that the lithium battery protection board passes the test under the condition that the switching state of the MOS tube is judged to be off.
On the other hand, the invention also provides a test method of the lithium battery protection board, which comprises the following steps:
outputting a normal temperature signal to the lithium battery protection board;
outputting a normal voltage signal to the lithium battery protection board;
outputting a discharge signal to the lithium battery protection board;
acquiring a CAN bus fault state signal output by the lithium battery protection board;
judging whether the CAN bus fault state signal is in a fault state;
under the condition that the CAN bus fault state signal is judged to be in a fault state, determining that the lithium battery protection board does not pass the test;
acquiring the on-off state of an MOS (metal oxide semiconductor) tube of the lithium battery protection board under the condition that the CAN bus fault state signal is judged to be non-fault;
judging whether the switch state of the MOS tube is closed or not;
determining that the lithium battery protection board passes the test under the condition that the switching state of the MOS tube is judged to be closed;
and under the condition that the switching state of the MOS tube is judged to be off, determining that the lithium battery protection board does not pass the test.
Optionally, the test method includes:
outputting an abnormal temperature signal to the lithium battery protection board;
outputting a normal voltage signal to the lithium battery protection board;
outputting a charging signal to the lithium battery protection board;
acquiring a CAN bus fault state signal output by the lithium battery protection board;
judging whether the CAN bus fault state signal is in a fault state;
under the condition that the CAN bus fault state signal is judged to be in a non-fault state, determining that the lithium battery protection board does not pass the test;
acquiring the on-off state of an MOS (metal oxide semiconductor) tube of the lithium battery protection board under the condition that the CAN bus fault state signal is judged to be in a fault state;
judging whether the switch state of the MOS tube is closed or not;
under the condition that the switch state of the MOS tube is judged to be closed, the lithium battery protection board is determined not to pass the test;
and determining that the lithium battery protection board passes the test under the condition that the switching state of the MOS tube is judged to be off.
Optionally, the test method includes:
outputting a normal temperature signal to the lithium battery protection board;
outputting a normal voltage signal to the lithium battery protection board;
outputting a charging signal to the lithium battery protection board;
acquiring a CAN bus fault state signal output by the lithium battery protection board;
judging whether the CAN bus fault state signal is in a fault state;
under the condition that the CAN bus fault state signal is judged to be in a fault state, determining that the lithium battery protection board does not pass the test;
acquiring the on-off state of an MOS (metal oxide semiconductor) tube of the lithium battery protection board under the condition that the CAN bus fault state signal is judged to be in a non-fault state;
judging whether the switch state of the MOS tube is closed or not;
determining that the lithium battery protection board passes the test under the condition that the switching state of the MOS tube is judged to be closed;
and under the condition that the switching state of the MOS tube is judged to be off, determining that the lithium battery protection board does not pass the test.
Optionally, the test method includes:
outputting a normal temperature signal to the lithium battery protection board;
outputting an abnormal voltage signal to the lithium battery protection board;
outputting a discharge signal to the lithium battery protection board;
acquiring a CAN bus fault state signal output by the lithium battery protection board;
judging whether the CAN bus fault state signal is in a fault state;
under the condition that the CAN bus fault state signal is judged to be in a non-fault state, determining that the lithium battery protection board does not pass the test;
acquiring the on-off state of an MOS (metal oxide semiconductor) tube of the lithium battery protection board under the condition that the CAN bus fault state signal is judged to be in a fault state;
judging whether the switch state of the MOS tube is closed or not;
under the condition that the switch state of the MOS tube is judged to be closed, the lithium battery protection board is determined not to pass the test;
and determining that the lithium battery protection board passes the test under the condition that the switching state of the MOS tube is judged to be off.
In yet another aspect, the present invention also provides a storage medium storing instructions for reading by a machine to cause the machine to perform a test method as described in any one of the above.
According to the technical scheme, the testing device, the testing method and the storage medium of the lithium battery protection board provided by the invention have the advantages that the bus signals sent by the lithium battery protection board are obtained by the CAN board card, the I/O board card outputs the analog signals of the charge and discharge switches to the lithium battery protection board, the resistance board card outputs the resistance signals of the analog temperature to the lithium battery protection board, the single board card outputs the voltage signals of the analog battery voltage to the lithium battery protection board, and further the upper computer is adopted for carrying out centralized control, so that the testing of the lithium battery protection board is completed under the condition of avoiding using abnormal equipment, the accidents caused by the abnormal equipment are avoided, and the personal safety of testers is guaranteed.
Additional features and advantages of embodiments of the invention will be set forth in the detailed description which follows.
Drawings
The accompanying drawings, which are included to provide a further understanding of the embodiments of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the embodiments of the invention without limiting the embodiments of the invention. In the drawings:
fig. 1 is a block diagram of a structure of a test apparatus for a lithium battery protection panel according to an embodiment of the present invention;
fig. 2 is one of flowcharts of a method of testing a lithium battery protection sheet according to an embodiment of the present invention;
fig. 3 is a second flowchart of a method for testing a lithium battery protection board according to an embodiment of the present invention;
fig. 4 is a third flowchart of a test method of a lithium battery protection board according to an embodiment of the present invention; and
fig. 5 is a fourth flowchart of a method of testing a lithium battery protection board according to an embodiment of the present invention.
Detailed Description
The following detailed description of embodiments of the invention refers to the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating embodiments of the invention, are given by way of illustration and explanation only, not limitation.
In the embodiments of the present invention, unless otherwise specified, the use of directional terms such as "upper, lower, top, and bottom" is generally used with respect to the orientation shown in the drawings or the positional relationship of the components with respect to each other in the vertical, or gravitational direction.
In addition, if there is a description of "first", "second", etc. in the embodiments 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, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, technical solutions between the various embodiments can be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not be within the protection scope of the present invention.
Fig. 1 is a block diagram illustrating a testing apparatus for a lithium battery protection board according to an embodiment of the present invention. In fig. 1, the testing device may include a CAN board 01, an I/O board 02, a resistor board 03, a single board 04, and an upper computer 05. The CAN board card 01 CAN be used for acquiring bus signals sent by the lithium battery protection board 10. The I/O board 02 may be used to output analog signals of the charge and discharge switches to the lithium battery protection board 10. The resistance board 03 can be used for outputting a resistance signal simulating temperature to the lithium battery protection board 10. The unit board card 04 may be configured to output a voltage signal simulating a battery voltage to the lithium battery protection board 10. The upper computer 05 CAN be connected with the lithium battery protection board 10, the CAN board card 01, the I/O board card 02, the resistor board card 03 and the monomer board card 04 and is used for controlling the work of the CAN board card 01, the I/O board card 02, the resistor board card 03 and the monomer board card 04 to test the lithium battery protection board 10.
In addition, in fig. 1, in order to facilitate centralized control of the power supply, the testing device may include a program-controlled power supply 06, and the program-controlled power supply 06 may be configured to receive a control signal of the upper computer 05 to start and stop the lithium battery protection board 10, the CAN board 01, the I/O board 02, the resistor board 03, and the single board 04.
In the prior art, the lithium battery protection plate 10 is a low-cost substitute for a battery management system, and is required to perform the functions of charging and discharging the battery, monitoring the temperature and monitoring the voltage. To ensure the lithium battery protection board 10 can work properly, the function needs to be tested one by one. In the prior art, real-vehicle test is often adopted, so that the test period is long and the cost is high. Thus, the inventors designed a test apparatus as shown in fig. 1. Through the testing device, the worker can complete the test of the lithium battery protection plate 10 under a simpler experimental environment, and potential safety hazards caused by real vehicle test are avoided. On the other hand, in view of the test requirements for the above functions, the inventors have devised a test method as shown in fig. 2 to 5, based on the test apparatus as shown in fig. 1. Specifically, the method comprises the following steps:
in fig. 2, the test method may include:
in step S10, a normal temperature signal is output to the lithium battery protection plate 10. In the case of using the testing apparatus as shown in fig. 1, the step S10 may be that the upper computer 05 controls the resistance board card 01 to simulate a normal temperature signal to the lithium battery protection board 10.
In step S11, a normal voltage signal is output to the lithium battery protection plate 10. In the case of using the testing apparatus shown in fig. 1, the step S11 may be that the upper computer 05 controls the cell board 02 to simulate a normal voltage signal to the lithium battery protection board 10.
In step S12, a discharge signal is output to the lithium battery protection plate 10. In the case of using the testing device shown in fig. 1, the step 12 may be that the upper computer 05 controls the I/O board 03 to simulate a discharge signal to the lithium battery protection board 10. The discharge signal may be a signal for giving a discharge instruction to the lithium battery protection plate 10.
In step S13, a CAN bus fault status signal output by the lithium battery protection board 10 is acquired. In the case of the test apparatus shown in fig. 1, the step 13 may be that the upper computer 05 acquires the CAN bus fault signal through the CAN board 04. The CAN bus fault signal is a signal for indicating whether the current state of the lithium battery is in fault, and the CAN bus fault signal is indicated to be in a non-fault state under the condition that the current voltage and the current temperature of the lithium battery are normal; and in case of the current voltage and/or temperature abnormality of the lithium battery, the CAN bus fault signal should indicate a fault state.
In step S14, it is determined whether the CAN bus fault status signal is in a fault state.
In step S15, in the case where it is determined that the CAN bus fault status signal is in the fault status, it is determined that the lithium battery protection panel 10 fails the test. As CAN be seen from steps S10 and S11, the currently simulated lithium battery status is normal temperature and normal voltage, and the lithium battery protection board 10 should output a CAN bus fault status signal indicating a non-fault status. If the CAN bus fault state signal indicating the fault state is output by the lithium battery protection board 10 at this time, the lithium battery protection board 10 may be considered as failing the test.
In step S16, when the CAN bus fault status signal is determined to be non-fault, the MOS transistor switching status of the lithium battery protection board 10 is acquired. In the case of using the testing apparatus as shown in fig. 1, the step S16 may obtain the MOS transistor switch state through the I/O board 02 by the upper computer 05. In addition, the switching state of the MOS transistor is an indication signal indicating whether the lithium battery is currently connected to the charging device or the discharging device. When the MOS tube is in an off state, the lithium battery is not connected with the charging equipment or the discharging equipment; when the switching state of the MOS tube is closed, the connection of the lithium battery and the charging equipment or the discharging equipment is represented.
In step S17, it is determined whether the MOS transistor switch state is closed.
In step S18, in the case where the MOS transistor switch state is determined to be closed, it is determined that the lithium battery protection board 10 passes the test. The switching state of the MOS tube is an indication signal for indicating whether the lithium battery is currently connected with the charging equipment or the discharging equipment. As can be seen from steps S10 and S11, the currently simulated lithium battery status is normal temperature and normal voltage. In the case that the lithium battery protection board 10 receives the discharge signal, the switching state of the MOS transistor should be a closed state. Therefore, in the step S18, it may be determined that the lithium battery protection sheet 10 passes the test.
In step S15, in the case where the MOS transistor switching state is determined to be off, it is determined that the lithium battery protection board 10 has failed the test. As can be seen from steps S10 and S11, the currently simulated lithium battery status is normal temperature and normal voltage. In the case that the lithium battery protection board 10 receives the discharge signal, the switching state of the MOS transistor should be a closed state. Therefore, in the step S15, it may be determined that the lithium battery protection sheet 10 fails the test.
In fig. 3, the test method may include:
in step S20, an abnormal temperature signal is output to the lithium battery protection plate 10. In the case of using the testing apparatus as shown in fig. 1, the step S20 may be that the upper computer 05 controls the resistance board card 01 to simulate an abnormal temperature signal to the lithium battery protection board 10. Specifically, the abnormal temperature signal may be a signal higher than the operating temperature of the conventional lithium battery, or may be a signal lower than the operating temperature of the conventional lithium battery.
In step S21, the cell board is controlled to output a normal voltage signal to the lithium battery protection board 10. In the case of using the testing apparatus shown in fig. 1, the step S21 may be that the upper computer 05 controls the cell board 02 to simulate a normal voltage signal to the lithium battery protection board 10.
In step S22, the I/O board is controlled to output a charging signal to the lithium battery protection panel 10. In the case of the testing device shown in fig. 1, the step 22 may be that the upper computer 05 controls the I/O board 03 to simulate a charging signal to the lithium battery protection board 10. The charging signal may be a signal for giving a charging instruction to the lithium battery protection plate 10.
In step S23, a CAN bus fault status signal output by the lithium battery protection board 10 is obtained through the CAN board. In the case of using the testing apparatus shown in fig. 1, the step 23 may be that the upper computer 05 acquires the CAN bus fault signal through the CAN board 04. The CAN bus fault signal is a signal for indicating whether the current state of the lithium battery is in fault, and the CAN bus fault signal is indicated to be in a non-fault state under the condition that the current voltage and the current temperature of the lithium battery are normal; and in case of the current voltage and/or temperature abnormality of the lithium battery, the CAN bus fault signal should indicate a fault state.
In step S24, it is determined whether the CAN bus fault status signal is in a fault state.
In step S25, in the case where it is determined that the CAN bus fault status signal is in the non-fault status, it is determined that the lithium battery protection panel 10 fails the test. As CAN be seen from steps S20 and S21, the currently simulated lithium battery status is abnormal temperature and normal voltage, and at this time, the lithium battery protection board 10 should output a CAN bus fault status signal indicating a fault status. If the CAN bus fault state signal indicating the non-fault state is output by the lithium battery protection board 10 at this time, it CAN be considered that the lithium battery protection board 10 fails the test.
In step S26, if it is determined that the CAN bus fault status signal is in a fault status, the MOS transistor switching status of the lithium battery protection board 10 is obtained through the I/O board. In the case of using the testing apparatus as shown in fig. 1, the step S26 may obtain the MOS transistor switch state through the I/O board 02 by the upper computer 05. In addition, the switching state of the MOS transistor is an indication signal indicating whether the lithium battery is currently connected to the charging device or the discharging device. When the MOS tube is in an off state, the lithium battery is not connected with the charging equipment or the discharging equipment; when the switching state of the MOS tube is closed, the connection of the lithium battery and the charging equipment or the discharging equipment is represented.
In step S27, it is determined whether the MOS transistor switch state is closed.
In step S25, in the case where the MOS transistor switch state is determined to be closed, it is determined that the lithium battery protection board 10 fails the test. The switching state of the MOS tube is an indication signal for indicating whether the lithium battery is currently connected with the charging equipment or the discharging equipment. As can be seen from steps S20 and S21, the currently simulated lithium battery states are an abnormal temperature and a normal voltage. In the case of receiving the discharge signal, the lithium battery protection board 10 should turn on or off the MOS transistor (refuse to charge the lithium battery). Therefore, in the step S25, it may be determined that the lithium battery protection sheet 10 passes the test.
In step S28, in the case where the MOS transistor switching state is determined to be off, it is determined that the lithium battery protection board 10 passes the test. As can be seen from steps S20 and S21, the currently simulated lithium battery states are an abnormal temperature and a normal voltage. In the case of receiving the discharge signal, the lithium battery protection board 10 should turn on or off the MOS transistor (refuse to charge the lithium battery). Therefore, in the step S28, it may be determined that the lithium battery protection sheet 10 passes the test.
In fig. 4, the test method may include:
in step S30, a normal temperature signal is output to the lithium battery protection plate 10. In the case of using the testing apparatus as shown in fig. 1, the step S30 may be that the upper computer 05 controls the resistance board card 01 to simulate a normal temperature signal to the lithium battery protection board 10.
In step S31, a normal voltage signal is output to the lithium battery protection plate 10. In the case of using the testing apparatus shown in fig. 1, the step S31 may be that the upper computer 05 controls the cell board 02 to simulate a normal voltage signal to the lithium battery protection board 10.
In step S32, a charging signal is output to the lithium battery protection panel 10. In the case of the testing device shown in fig. 1, the step 32 may be that the upper computer 05 controls the I/O board 03 to simulate a charging signal to the lithium battery protection board 10. The charging signal may be a signal for giving a charging instruction to the lithium battery protection plate 10.
In step S33, a CAN bus fault status signal output by the lithium battery protection board 10 is acquired. In the case of the test apparatus shown in fig. 1, the step 33 may be that the upper computer 05 acquires the CAN bus fault signal through the CAN board 04. The CAN bus fault signal is a signal for indicating whether the current state of the lithium battery is in fault, and the CAN bus fault signal is indicated to be in a non-fault state under the condition that the current voltage and the current temperature of the lithium battery are normal; and in case of the current voltage and/or temperature abnormality of the lithium battery, the CAN bus fault signal should indicate a fault state.
In step S34, it is determined whether the CAN bus fault status signal is in a fault state;
in step S35, in the case where it is determined that the CAN bus fault status signal is in the fault status, it is determined that the lithium battery protection panel 10 fails the test. As CAN be seen from steps S30 and S31, the currently simulated lithium battery status is normal temperature and normal voltage, and the lithium battery protection board 10 should output a CAN bus fault status signal indicating a non-fault status. If the CAN bus fault state signal indicating the fault state is output by the lithium battery protection board 10 at this time, the lithium battery protection board 10 may be considered as failing the test.
In step S36, when the CAN bus fault status signal is determined to be in the non-fault status, the MOS transistor switching status of the lithium battery protection board 10 is obtained through the I/O board. In the case of using the testing apparatus as shown in fig. 1, the step S36 may obtain the MOS transistor switch state through the I/O board 02 by the upper computer 05. In addition, the switching state of the MOS transistor is an indication signal indicating whether the lithium battery is currently connected to the charging device or the discharging device. When the MOS tube is in an off state, the lithium battery is not connected with the charging equipment or the discharging equipment; when the switching state of the MOS tube is closed, the connection of the lithium battery and the charging equipment or the discharging equipment is represented.
In step S37, it is determined whether the MOS transistor switch state is closed.
In step S38, in the case where the MOS transistor switch state is determined to be closed, it is determined that the lithium battery protection board 10 passes the test. The switching state of the MOS tube is an indication signal for indicating whether the lithium battery is currently connected with the charging equipment or the discharging equipment. As can be seen from steps S30 and S31, the currently simulated lithium battery status is normal temperature and normal voltage. In the case that the lithium battery protection board 10 receives the charging signal, the switching state of the MOS transistor should be a closed state at this time. Therefore, in the step S38, it may be determined that the lithium battery protection sheet 10 passes the test.
In step S35, in the case where the MOS transistor switching state is determined to be off, it is determined that the lithium battery protection board 10 has failed the test. As can be seen from steps S30 and S31, the currently simulated lithium battery status is normal temperature and normal voltage. In the case that the lithium battery protection board 10 receives the charging signal, the switching state of the MOS transistor should be a closed state at this time. Therefore, in the step S35, it may be determined that the lithium battery protection sheet 10 fails the test.
In fig. 5, the test method may include:
in step S40, the resistance board is controlled to output a normal temperature signal to the lithium battery protection board 10. In the case of using the testing apparatus as shown in fig. 1, the step S40 may be that the upper computer 05 controls the resistance board card 01 to simulate a normal temperature signal to the lithium battery protection board 10.
In step S41, the single board is controlled to output an abnormal voltage signal to the lithium battery protection board 10; in the case of using the testing apparatus shown in fig. 1, the step S41 may be that the upper computer 05 controls the cell board 02 to simulate an abnormal voltage signal to the lithium battery protection board 10. Specifically, the abnormal voltage signal may be, for example, a voltage value signal higher than that of the conventional unit cell or a voltage value signal lower than that of the conventional unit cell.
In step S42, the I/O board is controlled to output a discharge signal to the lithium battery protection panel 10. In the case of using the testing apparatus shown in fig. 1, the step 42 may be that the upper computer 05 controls the I/O board 03 to simulate a discharge signal to the lithium battery protection board 10. The discharge signal may be a signal for giving a discharge instruction to the lithium battery protection plate 10.
In step S43, a CAN bus fault status signal output by the lithium battery protection board 10 is obtained through the CAN board. In the case of the test apparatus shown in fig. 1, the step 43 may be that the upper computer 05 acquires the CAN bus fault signal through the CAN board 04. The CAN bus fault signal is a signal for indicating whether the current state of the lithium battery is in fault, and the CAN bus fault signal is indicated to be in a non-fault state under the condition that the current voltage and the current temperature of the lithium battery are normal; and in case of the current voltage and/or temperature abnormality of the lithium battery, the CAN bus fault signal should indicate a fault state.
In step S44, it is determined whether the CAN bus fault status signal is in a fault state.
In step S45, in the case where it is determined that the CAN bus fault status signal is in the non-fault status, it is determined that the lithium battery protection panel 10 fails the test. As CAN be seen from steps S40 and S41, the currently simulated lithium battery status is normal temperature and abnormal voltage, and at this time, the lithium battery protection board 10 should output a CAN bus fault status signal indicating a fault status. If the CAN bus fault state signal indicating the non-fault state is output by the lithium battery protection board 10 at this time, it CAN be considered that the lithium battery protection board 10 fails the test.
In step S46, if it is determined that the CAN bus fault status signal is in a fault status, the MOS transistor switching status of the lithium battery protection board 10 is obtained through the I/O board. In the case of using the testing apparatus as shown in fig. 1, the step S46 may obtain the MOS transistor switch state through the I/O board 02 by the upper computer 05. In addition, the switching state of the MOS transistor is an indication signal indicating whether the lithium battery is currently connected to the charging device or the discharging device. When the MOS tube is in an off state, the lithium battery is not connected with the charging equipment or the discharging equipment; when the switching state of the MOS tube is closed, the connection of the lithium battery and the charging equipment or the discharging equipment is represented.
In step S47, it is determined whether the MOS transistor is off.
In step S45, in the case where the MOS transistor switch state is determined to be closed, it is determined that the lithium battery protection board 10 fails the test. The switching state of the MOS tube is an indication signal for indicating whether the lithium battery is currently connected with the charging equipment or the discharging equipment. As can be seen from steps S40 and S41, the currently simulated lithium battery status is normal temperature and abnormal voltage. In the case that the lithium battery protection board 10 receives the discharge signal, the MOS transistor switching state should be an off state at this time. Therefore, in the step S18, it may be determined that the lithium battery protection sheet 10 fails the test.
In step S48, in the case where the MOS transistor switching state is determined to be off, it is determined that the lithium battery protection board 10 passes the test. As can be seen from steps S40 and S41, the currently simulated lithium battery status is normal temperature and abnormal voltage. In the case that the lithium battery protection board 10 receives the discharge signal, the MOS transistor switching state should be an off state at this time. Therefore, in the step S48, it may be determined that the lithium battery protection sheet 10 passes the test.
In yet another aspect, the present invention also provides a storage medium storing instructions for reading by a machine to cause the machine to perform a test method as any one of the above.
According to the technical scheme, the testing device, the testing method and the storage medium of the lithium battery protection board provided by the invention have the advantages that the CAN board is adopted to obtain the bus signals sent by the lithium battery protection board, the I/O board outputs the analog signals of the charge and discharge switches to the lithium battery protection board, the resistor board outputs the resistor signals of the analog temperature to the lithium battery protection board, the single board outputs the voltage signals of the analog battery voltage to the lithium battery protection board, and further the upper computer is adopted to carry out centralized control, so that the testing of the lithium battery protection board is completed under the condition of avoiding using abnormal equipment, the accidents caused by abnormal equipment are avoided, and the personal safety of testers is guaranteed.
Although the embodiments of the present invention have been described in detail with reference to the accompanying drawings, the embodiments of the present invention are not limited to the details of the above embodiments, and various simple modifications can be made to the technical solution of the embodiments of the present invention within the technical idea of the embodiments of the present invention, and the simple modifications all belong to the protection scope of the embodiments of the present invention.
It should be noted that the various features described in the above embodiments may be combined in any suitable manner without departing from the scope of the invention. In order to avoid unnecessary repetition, the embodiments of the present invention will not be described separately for the various possible combinations.
Those skilled in the art can understand that all or part of the steps in the method for implementing the above embodiments may be implemented by a program instructing related hardware, where the program is stored in a storage medium and includes several instructions to enable a single chip, a chip, or a processor (processor) to execute all or part of the steps in the method according to the embodiments of the present application. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.
In addition, various different embodiments of the present invention may be arbitrarily combined with each other, and the embodiments of the present invention should be considered as disclosed in the disclosure of the embodiments of the present invention as long as the embodiments do not depart from the spirit of the embodiments of the present invention.
Claims (10)
1. The utility model provides a testing arrangement of lithium cell protection shield which characterized in that, testing arrangement includes:
the CAN board card is used for acquiring a bus signal sent by the lithium battery protection board;
the I/O board card is used for outputting analog signals of the charge and discharge switches to the lithium battery protection board;
the resistance board card is used for outputting a resistance signal of the simulation temperature to the lithium battery protection board;
the single board card is used for outputting a voltage signal simulating the voltage of the battery to the lithium battery protection board;
the upper computer is connected with the lithium battery protection board, the CAN board card, the I/O board card, the resistor board card and the monomer board card and is used for controlling the work of the CAN board card, the I/O board card, the resistor board card and the monomer board card to test the lithium battery protection board.
2. The testing device of claim 1, wherein the upper computer is configured to:
controlling the resistance board card to output a normal temperature signal to the lithium battery protection board;
controlling the single board card to output a normal voltage signal to the lithium battery protection board;
controlling the I/O board card to output a discharge signal to the lithium battery protection board;
acquiring a CAN bus fault state signal output by the lithium battery protection board through the CAN board card;
judging whether the CAN bus fault state signal is in a fault state;
under the condition that the CAN bus fault state signal is judged to be in a fault state, determining that the lithium battery protection board does not pass the test;
under the condition that the CAN bus fault state signal is judged to be non-fault, the on-off state of the MOS tube of the lithium battery protection board is obtained through the I/O board card;
judging whether the switch state of the MOS tube is closed or not;
determining that the lithium battery protection board passes the test under the condition that the switching state of the MOS tube is judged to be closed;
and under the condition that the switching state of the MOS tube is judged to be off, determining that the lithium battery protection board does not pass the test.
3. The testing device of claim 1, wherein the upper computer is configured to:
controlling the resistance board card to output an abnormal temperature signal to the lithium battery protection board;
controlling the single board card to output a normal voltage signal to the lithium battery protection board;
controlling the I/O board card to output a charging signal to the lithium battery protection board;
acquiring a CAN bus fault state signal output by the lithium battery protection board through the CAN board card;
judging whether the CAN bus fault state signal is in a fault state;
under the condition that the CAN bus fault state signal is judged to be in a non-fault state, determining that the lithium battery protection board does not pass the test;
under the condition that the CAN bus fault state signal is judged to be in a fault state, the on-off state of the MOS tube of the lithium battery protection board is obtained through the I/O board card;
judging whether the switch state of the MOS tube is closed or not;
under the condition that the switch state of the MOS tube is judged to be closed, the lithium battery protection board is determined not to pass the test;
and determining that the lithium battery protection board passes the test under the condition that the switching state of the MOS tube is judged to be off.
4. The testing device of claim 1, wherein the upper computer is configured to:
controlling the resistance board card to output a normal temperature signal to the lithium battery protection board;
controlling the single board card to output a normal voltage signal to the lithium battery protection board;
controlling the I/O board card to output a charging signal to the lithium battery protection board;
acquiring a CAN bus fault state signal output by the lithium battery protection board through the CAN board card;
judging whether the CAN bus fault state signal is in a fault state;
under the condition that the CAN bus fault state signal is judged to be in a fault state, determining that the lithium battery protection board does not pass the test;
under the condition that the CAN bus fault state signal is judged to be in a non-fault state, the on-off state of the MOS tube of the lithium battery protection board is obtained through the I/O board card;
judging whether the switch state of the MOS tube is closed or not;
determining that the lithium battery protection board passes the test under the condition that the switching state of the MOS tube is judged to be closed;
and under the condition that the switching state of the MOS tube is judged to be off, determining that the lithium battery protection board does not pass the test.
5. The testing device of claim 1, wherein the upper computer is configured to:
controlling the resistance board card to output a normal temperature signal to the lithium battery protection board;
controlling the single board card to output an abnormal voltage signal to the lithium battery protection board;
controlling the I/O board card to output a discharge signal to the lithium battery protection board;
acquiring a CAN bus fault state signal output by the lithium battery protection board through the CAN board card;
judging whether the CAN bus fault state signal is in a fault state;
under the condition that the CAN bus fault state signal is judged to be in a non-fault state, determining that the lithium battery protection board does not pass the test;
under the condition that the CAN bus fault state signal is judged to be in a fault state, the on-off state of the MOS tube of the lithium battery protection board is obtained through the I/O board card;
judging whether the switch state of the MOS tube is closed or not;
under the condition that the switch state of the MOS tube is judged to be closed, the lithium battery protection board is determined not to pass the test;
and determining that the lithium battery protection board passes the test under the condition that the switching state of the MOS tube is judged to be off.
6. A test method of a lithium battery protection board is characterized by comprising the following steps:
outputting a normal temperature signal to the lithium battery protection board;
outputting a normal voltage signal to the lithium battery protection board;
outputting a discharge signal to the lithium battery protection board;
acquiring a CAN bus fault state signal output by the lithium battery protection board;
judging whether the CAN bus fault state signal is in a fault state;
under the condition that the CAN bus fault state signal is judged to be in a fault state, determining that the lithium battery protection board does not pass the test;
acquiring the on-off state of an MOS (metal oxide semiconductor) tube of the lithium battery protection board under the condition that the CAN bus fault state signal is judged to be non-fault;
judging whether the switch state of the MOS tube is closed or not;
determining that the lithium battery protection board passes the test under the condition that the switching state of the MOS tube is judged to be closed;
and under the condition that the switching state of the MOS tube is judged to be off, determining that the lithium battery protection board does not pass the test.
7. The testing method of claim 6, wherein the testing method comprises:
outputting an abnormal temperature signal to the lithium battery protection board;
outputting a normal voltage signal to the lithium battery protection board;
outputting a charging signal to the lithium battery protection board;
acquiring a CAN bus fault state signal output by the lithium battery protection board;
judging whether the CAN bus fault state signal is in a fault state;
under the condition that the CAN bus fault state signal is judged to be in a non-fault state, determining that the lithium battery protection board does not pass the test;
acquiring the on-off state of an MOS (metal oxide semiconductor) tube of the lithium battery protection board under the condition that the CAN bus fault state signal is judged to be in a fault state;
judging whether the switch state of the MOS tube is closed or not;
under the condition that the switch state of the MOS tube is judged to be closed, the lithium battery protection board is determined not to pass the test;
and determining that the lithium battery protection board passes the test under the condition that the switching state of the MOS tube is judged to be off.
8. The testing method of claim 6, wherein the testing method comprises:
outputting a normal temperature signal to the lithium battery protection board;
outputting a normal voltage signal to the lithium battery protection board;
outputting a charging signal to the lithium battery protection board;
acquiring a CAN bus fault state signal output by the lithium battery protection board;
judging whether the CAN bus fault state signal is in a fault state;
under the condition that the CAN bus fault state signal is judged to be in a fault state, determining that the lithium battery protection board does not pass the test;
acquiring the on-off state of an MOS (metal oxide semiconductor) tube of the lithium battery protection board under the condition that the CAN bus fault state signal is judged to be in a non-fault state;
judging whether the switch state of the MOS tube is closed or not;
determining that the lithium battery protection board passes the test under the condition that the switching state of the MOS tube is judged to be closed;
and under the condition that the switching state of the MOS tube is judged to be off, determining that the lithium battery protection board does not pass the test.
9. The testing method of claim 1, wherein the testing method comprises:
outputting a normal temperature signal to the lithium battery protection board;
outputting an abnormal voltage signal to the lithium battery protection board;
outputting a discharge signal to the lithium battery protection board;
acquiring a CAN bus fault state signal output by the lithium battery protection board;
judging whether the CAN bus fault state signal is in a fault state;
under the condition that the CAN bus fault state signal is judged to be in a non-fault state, determining that the lithium battery protection board does not pass the test;
acquiring the on-off state of an MOS (metal oxide semiconductor) tube of the lithium battery protection board under the condition that the CAN bus fault state signal is judged to be in a fault state;
judging whether the switch state of the MOS tube is closed or not;
under the condition that the switch state of the MOS tube is judged to be closed, the lithium battery protection board is determined not to pass the test;
and determining that the lithium battery protection board passes the test under the condition that the switching state of the MOS tube is judged to be off.
10. A storage medium storing instructions for reading by a machine to cause the machine to perform a test method according to any one of claims 6 to 9.
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| CN202011089777.1A CN112285463A (en) | 2020-10-13 | 2020-10-13 | Testing device and method for lithium battery protection board and storage medium |
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| CN202011089777.1A CN112285463A (en) | 2020-10-13 | 2020-10-13 | Testing device and method for lithium battery protection board and storage medium |
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| CN210720647U (en) * | 2019-08-28 | 2020-06-09 | 武汉彦阳物联科技有限公司 | Be used for lithium cell BMS protection shield test circuit |
| CN110824367A (en) * | 2019-09-26 | 2020-02-21 | 福建星云电子股份有限公司 | Hardware-in-loop test system and method for new energy automobile battery management system |
| CN211478544U (en) * | 2019-11-18 | 2020-09-11 | 东莞市百维科技有限公司 | BMS protection board test system |
| CN211348477U (en) * | 2019-12-03 | 2020-08-25 | 山东爱德邦智能科技有限公司 | Lithium battery protection board detection device |
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Application publication date: 20210129 |