CN106383277A - Test platform for electric automobile battery management system - Google Patents
Test platform for electric automobile battery management system Download PDFInfo
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- CN106383277A CN106383277A CN201610737324.2A CN201610737324A CN106383277A CN 106383277 A CN106383277 A CN 106383277A CN 201610737324 A CN201610737324 A CN 201610737324A CN 106383277 A CN106383277 A CN 106383277A
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- 238000012360 testing method Methods 0.000 title claims abstract description 158
- 239000003990 capacitor Substances 0.000 claims abstract description 19
- 238000004088 simulation Methods 0.000 claims description 27
- 238000004891 communication Methods 0.000 claims description 20
- 238000009413 insulation Methods 0.000 claims description 7
- 238000004519 manufacturing process Methods 0.000 abstract description 7
- 238000010586 diagram Methods 0.000 description 7
- 238000005259 measurement Methods 0.000 description 4
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- 230000005540 biological transmission Effects 0.000 description 1
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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
- G01R31/005—Testing of electric installations on transport means
- G01R31/006—Testing of electric installations on transport means on road vehicles, e.g. automobiles or trucks
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Abstract
The invention provides a test platform for an electric automobile battery management system. The test platform for the electric automobile battery management system adopts circuit elements which are generally used in the laboratory, such as a DC high-voltage power supply, a relay, a resistor, a capacitor and a fuse, and then a test platform for the electric automobile battery management system is established in the laboratory, so that a test for the electric automobile battery management system can be performed independently in a mode of breaking away from a finished electric automobile, thereby saving the manufacturing cost of the electric automobile. In addition, the test for the electric automobile battery management system can be completed before the electric automobile is manufactured, thereby advancing a test opportunity of the battery management system, and providing first-hand data for manufacturing of the electric automobile.
Description
Technical Field
The invention relates to the technical field of electric vehicle battery management systems, in particular to a test platform for testing an electric vehicle battery management system.
Background
In recent years, electric vehicles have gradually come into public vision, and are beginning to become transportation vehicles for people to go out, the most core and important part of electric vehicles is the power battery on the vehicle, and for the power battery, an effective battery management system is an important guarantee for ensuring the normal operation of the power battery and avoiding the occurrence of danger.
The automobile is used as a main vehicle for people to go out, certain safety and reliability must be achieved, and therefore the safety of a human body can be guaranteed, the battery management system needs to have real-time monitoring performance on the power battery, and safety guarantee is provided for going out. Therefore, the battery management system must first perform the relevant test verification before the commissioning verification.
The existing test of the battery management system of the electric automobile is generally carried out on the whole automobile, but the production cost of the whole automobile is high, and the adjustment is inconvenient. Therefore, a simple and effective scheme for testing the battery management system of the electric vehicle, which can be separated from the whole vehicle, is needed.
Disclosure of Invention
The invention aims to provide a test platform of an electric vehicle battery management system, which is used for testing the electric vehicle battery management system by using common laboratory equipment.
The invention provides a test platform of a battery management system of an electric automobile, wherein the battery management system comprises a BMS mainboard, a BMS slave plate and a high-voltage plate, the BMS mainboard, the BMS slave plate and the high-voltage plate are in data communication through an intranet CAN bus, and the test platform comprises:
the direct-current high-voltage power supply is used for simulating the electric energy output of the storage battery of the electric automobile;
the battery information simulation interface is connected to the BMS slave board through a signal acquisition line so as to provide a voltage simulation signal and a temperature simulation signal for the BMS slave board, wherein the voltage simulation signal is used for simulating the voltage of each battery pack in the electric automobile storage battery, and the temperature simulation signal is used for simulating the temperature of the electric automobile storage battery;
the test circuit is connected with the direct-current high-voltage power supply and is powered by the direct-current high-voltage power supply, and is used for simulating a power output circuit of an electric automobile, wherein a plurality of test relays are connected in the test circuit and are used for simulating relays used in the power output circuit; wherein,
the high-voltage board is connected in series with the test circuit to obtain the total current of the test circuit, and is connected to the test relays in the test circuit through a voltage acquisition line to obtain the loop current of the test circuit and the voltage of each test relay, and meanwhile, the total positive grounding end and the total negative grounding end of the high-voltage board are grounded through different test resistors respectively to test the insulation function of the high-voltage board according to the resistance value of the test resistors;
BMS mainboard connect in each test relay's in the test circuit control end, and the BMS mainboard is through whole car CAN bus receiving and dispatching whole car simulation communication information, the BMS mainboard is through the CAN bus receiving and dispatching simulation communication information that charges, wherein, whole car simulation communication information is used for simulating the communication information between electric automobile's well accuse computer and the BMS mainboard, the simulation communication information that charges is used for simulating the communication information between electric automobile machine that charges and the BMS mainboard.
Further, the test circuit comprises a positive switch branch, a negative switch branch and a charging and motor branch; wherein,
the positive switch branch, the charging and motor branch, the negative switch branch and the high-voltage plate are sequentially connected in series from the positive electrode to the negative electrode of the direct-current high-voltage power supply.
Further, the positive switch branch comprises:
the positive switch relay is connected between the positive electrode of the direct-current high-voltage power supply and the charging and motor branch in series, and the switch control end of the positive switch relay is connected to the BMS mainboard; wherein,
the high-voltage board is connected to through the voltage acquisition line respectively positive switch relay connect in direct current high voltage power supply's one end and positive switch relay connect in charge and the one end of motor branch road, in order to gather respectively positive switch relay connect in the voltage value of direct current high voltage power supply one end and positive switch relay connect in charge and the voltage value of motor branch road one end.
Further, the negative switch branch includes:
the negative switch relay is connected between the charging and motor branch and the high-voltage board in series, and the switch control end of the negative switch relay is connected to the BMS mainboard; wherein,
the high-voltage board is connected to the negative switch relay through a voltage acquisition line and connected to one end of the charging and motor branch circuit so as to acquire a voltage value of the negative switch relay connected to one end of the charging and motor branch circuit.
Further, the charging and motor branch comprises a charging test branch and a first motor test branch; wherein,
the charging test branch and the first motor test branch are connected in parallel between the positive switch branch and the negative switch branch;
the charging test branch comprises a charging relay which is directly connected between the positive switch branch and the negative switch branch;
the first motor test branch comprises a first motor positive relay, a first motor pre-charging relay and a first motor pre-charging resistor; wherein,
the first motor positive relay is directly connected between the positive switch branch and the negative switch branch;
the first motor pre-charging relay and the first motor pre-charging resistor are connected in series between the positive pole switch branch and the negative pole switch branch;
the switch control end of the charging relay, the switch control end of the first motor positive electrode relay and the switch control end of the first motor pre-charging relay are connected to the BMS mainboard;
the high-voltage board is connected to the charging relay through a voltage acquisition line and connected to one end of the negative switch branch, so that the voltage value of the charging relay connected to one end of the negative switch branch is acquired.
Furthermore, the charging and motor branch also comprises a second motor testing branch, and the second motor testing branch, the charging testing branch and the first motor testing branch are simultaneously connected in parallel between the positive switch branch and the negative switch branch; wherein,
the second motor test branch comprises a second motor positive relay, a second motor pre-charging relay and a second motor pre-charging resistor; wherein,
the second motor positive relay is directly connected between the positive switch branch and the negative switch branch;
the second motor pre-charging relay and the second motor pre-charging resistor are connected in series between the positive pole switch branch and the negative pole switch branch;
and the switch control end of the second motor positive electrode relay and the switch control end of the second motor pre-charging relay are connected to the BMS mainboard.
Further, the test circuit further comprises a capacitor;
the capacitor is connected in series between the charging and motor branch and the negative switch branch.
Further, the test circuit further comprises a fuse;
the fuse is connected between the charging and motor branch and the capacitor in series; or, the fuse is connected in series between the capacitor and the negative switch branch.
Further, the test circuit also comprises a 12V power supply; wherein,
the BMS main board, the BMS slave board and the high-voltage board are powered by the 12V power supply.
Further, the 12V power supply directly supplies power to the BMS motherboard;
the 12V power supply supplies power to the BMS slave plate and the high-voltage plate through an internal network relay; and,
and the control end of the internal network relay is connected to the BMS mainboard to switch on and switch off power supply to the BMS slave plate and the high-voltage plate under the control of the BMS mainboard.
According to the scheme, circuit elements such as a direct-current high-voltage power supply, a relay, a resistor, a capacitor, a fuse and the like adopted by the test platform of the electric vehicle battery management system are common elements in a laboratory, and the test platform of the electric vehicle battery management system is further built in the laboratory, so that the test on the electric vehicle battery management system can be separated from the whole electric vehicle and carried out independently, the manufacturing cost of the electric vehicle is saved, the test on the electric vehicle battery management system can be completed before the electric vehicle is manufactured, the test time of the battery management system is advanced, and one-hand data is provided for the manufacture of the electric vehicle.
Drawings
The following drawings are only schematic illustrations and explanations of the present invention, and do not limit the scope of the present invention.
FIG. 1 is a schematic diagram of an embodiment of a test platform of a battery management system of an electric vehicle according to the present invention;
FIG. 2 is a block diagram of a test platform of an electric vehicle battery management system according to an embodiment of the present invention;
fig. 3 is a schematic circuit diagram of an embodiment of a test platform of the battery management system of an electric vehicle according to the invention.
Description of the reference symbols
1. Test platform
11. DC high-voltage power supply
12. Battery information simulation interface
13. Test circuit
K1, positive pole switch relay
K2, negative pole switch relay
K3, charging relay
K4, first motor positive relay
K5, first motor pre-charge relay
R1, first motor pre-charge resistance
K6, second motor positive relay
K7, second motor pre-charge relay
R2 and second motor pre-charging resistor
FU, fuse
C1 and capacitor
14. 12V power supply
K8, internal network relay
2. Battery management system
201. BMS mainboard
202. BMS slave plate
203. High-pressure plate
Detailed Description
In order to more clearly understand the technical features, objects, and effects of the present invention, embodiments of the present invention will now be described with reference to the accompanying drawings, in which like reference numerals refer to like parts throughout.
"exemplary" means "serving as an example, instance, or illustration" herein, and any illustration, embodiment, or steps described as "exemplary" herein should not be construed as a preferred or advantageous alternative.
For the sake of simplicity, the drawings are only schematic representations of the parts relevant to the invention, and do not represent the actual structure of the product. In addition, in order to make the drawings concise and understandable, components having the same structure or function in some of the drawings are only schematically illustrated or only labeled.
In this document, "a" does not mean that the number of the relevant portions of the present invention is limited to "only one", and "a" does not mean that the number of the relevant portions of the present invention "more than one" is excluded.
In this document, "upper", "lower", "front", "rear", "left", "right", and the like are used only to indicate relative positional relationships between relevant portions, and do not limit absolute positions of the relevant portions.
In this document, "first", "second", and the like are used only for distinguishing one from another, and do not indicate the degree and order of importance, the premise that each other exists, and the like.
Fig. 1 is a schematic diagram of a testing platform of an electric vehicle battery management system according to an embodiment of the present invention. The electric vehicle battery management system 2 is divided into three parts, namely a BMS mainboard 201, a BMS slave board 202 and a high voltage board 203, data transmission is carried out between the BMS mainboard 201 and the BMS slave board 202 and the high voltage board 203 through an intranet CAN bus, and the BMS mainboard 201, the BMS slave board 202 and the high voltage board 203 are powered by independent 12V power supplies during work. The functions of the three parts are respectively as follows:
the BMS slave board 202 is used for collecting data parameters of the power battery box of the electric automobile, including the temperature, the voltage value and the like of each single battery in the power battery box, and sending the collected data to the BMS master board 201;
the high-voltage board 203 is used for acquiring data parameters of a high-voltage loop (namely a power supply loop of the power battery box) of the electric automobile, including total current, total voltage, pre-charging voltage and the like in the high-voltage loop, acquiring the insulation resistance value of the battery management system 1 to the automobile body ground, and sending the acquired data to the BMS mainboard 201;
the BMS board 201 receives the charging data of the charger (charging pile) through the charging CAN bus, receives the download instruction of the central control computer of the entire vehicle through the entire vehicle CAN bus, uploads the data parameters of the power battery box of the entire vehicle to the central control computer of the entire vehicle through the entire vehicle CAN bus, connects to each relevant position (including the control end of each relay in the high voltage circuit, relevant status indicator lamps, display devices, etc.) in the high voltage circuit through the I/O interface of the BMS board 201 itself, and performs corresponding processing, such as controlling the switch of the corresponding relay, displaying relevant status information, etc., according to the data parameters of the power battery box, the data parameters of the high voltage circuit, the charging data of the charger and the download instruction of the central control computer of the entire vehicle.
In the embodiment of the present invention, the I/O interface of the BMS board 201 is mainly a control pin for controlling some relays and indicator lights. Some basic functions of the BMS can be easily verified under laboratory conditions.
In the embodiment of the invention, in the test platform 1, the voltage of the single battery received by the BMS from the board 202 is provided by the battery simulator, and the temperature signal of the battery received by the board 202 is provided by the adjustable resistor (in actual measurement, the temperature signal collected by the BMS from the board 202 measures the actual temperature according to the different resistance values of the temperature probe under different environments).
Relays and indicator lights controlled by the I/O interface of the BMS board 201, and a battery simulator and an adjustable resistor of the BMS board 202 may be fixedly mounted to one circuit board.
Referring to fig. 2, in the embodiment of the present invention, the test platform 1 mainly includes a dc high voltage power supply 11, a battery information simulation interface 12, and a test circuit 13. The direct-current high-voltage power supply 11 is used for simulating the electric energy output of the storage battery of the electric automobile. The battery information simulation interface 12 is connected to the BMS slave board 202 through a signal collecting line to provide the BMS slave board 202 with a voltage simulation signal for simulating a voltage of each battery pack in the electric vehicle battery and a temperature simulation signal for simulating a temperature of the electric vehicle battery. The test circuit 13 is connected to the dc high voltage power supply 11 and is powered by the dc high voltage power supply 11, the test circuit 13 is configured to simulate a power output circuit of an electric vehicle, wherein a plurality of test relays are connected to the test circuit 13, the test relays are configured to simulate relays used in the power output circuit, and details of the plurality of test relays are described in the following description.
In the embodiment of the present invention, the high-voltage board 203 is connected in series to the test circuit 13 to obtain a total current of the test circuit 13, and the high-voltage board 203 is further connected to the test relays in the test circuit 13 through voltage acquisition lines to obtain a loop current of the test circuit 13 and voltages at the test relays (see details in the following description), and meanwhile, the total positive ground terminal and the total negative ground terminal of the high-voltage board 203 are grounded through different test resistors respectively to test an insulation function of the high-voltage board 203 according to a resistance value of the test resistors.
In the embodiment of the present invention, the BMS board 201 is connected to the control terminals of the test relays in the test circuit 13, the BMS board 201 receives and transmits the entire car analog communication information through the entire car CAN bus, and the BMS board 201 receives and transmits the charging analog communication information through the charging CAN bus, wherein the entire car analog communication information is used for simulating the communication information between the central control computer of the electric car and the BMS board 201, and the charging analog communication information is used for simulating the communication information between the electric car charger and the BMS board 201.
Fig. 3 shows a schematic circuit diagram of an embodiment of a test platform of the battery management system of an electric vehicle according to the present invention, and it should be noted that fig. 3 is a schematic circuit diagram, which is not a strict circuit diagram.
Referring to fig. 2 and 3, the test circuit 13 includes a positive switch branch, a negative switch branch, and a charging and motor branch. The positive switch branch, the charging and motor branch, the negative switch branch and the high-voltage board 203 are sequentially connected in series from the positive electrode of the direct-current high-voltage power supply 11 to the negative electrode thereof.
Specifically, as shown in fig. 3, the positive switch branch includes a positive switch relay K1, the positive switch relay K1 is connected in series between the positive pole of the dc high-voltage power supply 11 and the charging and motor branch, and the switch control terminal of the positive switch relay K1 is connected to the BMS board 201. The high-voltage board 203 is connected to the positive switch relay K1 and the positive switch relay K1 through voltage collecting lines, respectively, and is connected to one end of the dc high-voltage power supply 11 and one end of the charging and motor branch, so as to collect the voltage value of the positive switch relay K1 and the voltage value of the positive switch relay K1, respectively, which are connected to one end of the dc high-voltage power supply 11 and one end of the charging and motor branch.
As shown in fig. 3, the negative switch branch comprises a negative switch relay K2, the negative switch relay K2 is connected in series between the charging and motor branch and the high voltage board 203, and the switch control terminal of the negative switch relay K2 is connected to the BMS main board 20. The high-voltage board 203 is connected to the negative switch relay K2 through a voltage collecting line and is connected to one end of the charging and motor branch, so as to collect a voltage value of the negative switch relay K2 connected to one end of the charging and motor branch.
As shown in fig. 3, the charging and motor branch includes a charging test branch and a first motor test branch. The charging test branch and the first motor test branch are connected in parallel between the positive switch branch (namely, the positive switch relay K1) and the negative switch branch (namely, the negative switch relay K2).
The charging test branch comprises a charging relay K3, and the charging relay K3 is directly connected between the positive pole switch branch and the negative pole switch branch.
The first motor test branch comprises a first motor positive relay K4, a first motor pre-charging relay K5 and a first motor pre-charging resistor R1. The first motor positive relay K4 is directly connected between the positive switch branch and the negative switch branch. The first motor pre-charging relay K5 and the first motor pre-charging resistor R1 are connected in series between the positive pole switch branch and the negative pole switch branch.
The switch control terminal of the charging relay K3, the switch control terminal of the first motor positive relay K4, and the switch control terminal of the first motor precharge relay K5 are all connected to the BMS board 201. The high-voltage board 203 is connected to one end of the charging relay K3 connected to the negative switch branch through a voltage collecting line so as to collect the voltage value of the charging relay K3 connected to one end of the negative switch branch.
With continued reference to fig. 3, in the embodiment of the present invention, the charging and motor branch further includes a second motor testing branch, and the second motor testing branch, the charging testing branch and the first motor testing branch are simultaneously connected in parallel between the positive switch branch and the negative switch branch. The second motor test branch comprises a second motor positive relay K6, a second motor pre-charging relay K7 and a second motor pre-charging resistor R2. The second motor positive relay K6 is directly connected between the positive switch branch and the negative switch branch. The second motor pre-charging relay K7 and the second motor pre-charging resistor R2 are connected in series between the positive pole switch branch and the negative pole switch branch. The switch control end of the second motor positive relay K6 and the switch control end of the second motor pre-charge relay K7 are both connected to the BMS motherboard 201.
The embodiment with the first motor testing branch and the second motor testing branch is applicable to testing of a battery management system of a double-motor electric automobile. If only a single motor battery management system needs to be tested, only one motor test branch embodiment may be used. A first motor, such as a front motor, and a second motor, such as a rear motor.
The purpose of the test platform embodiment of the electric vehicle battery management system of the invention is to verify whether the on-off control of each relay is accurate by verifying the voltage at each position in the test circuit 13. In the embodiment of the present invention, as shown in fig. 3, the test circuit 13 further includes a capacitor C1, and the capacitor C1 is connected in series between the charging and motor branch and the negative switch branch. Although the capacitor C1 is added to affect the current, the embodiment of the test platform of the present invention only needs to verify the voltage at various places in the test circuit 13, and the purpose of adding the capacitor C1 is to protect the test circuit 13 and prevent the test circuit 13 from generating large current to burn out the device due to the instantaneous switching of the relay.
In order to protect the safety of the test circuit and prevent the impact of overlarge current, the embodiment of the invention additionally adds a fuse FU. In particular, as shown in fig. 3, the test circuit 13 further comprises a fuse FU connected in series between the charging and motor branch and a capacitor C1. In another embodiment, the fuse FU may also be connected in series between the capacitor C1 and the negative switching leg.
In addition, in order to support the normal operation of the battery management system 2 of the electric vehicle, the test circuit 13 further includes a 12V power supply 14, and the BMS main board 201, the BMS slave board 202 and the high voltage board 203 are all powered by the 12V power supply 14. Connection relationships between the 12V power supply 14 and the BMS board 201, the BMS slave board 202 and the high voltage board 203 are specifically shown in fig. 3, the 12V power supply directly supplies power to the BMS board 201, the 12V power supply 14 supplies power to the BMS slave board 202 and the high voltage board 203 through the internal network relay K8, and the control terminal of the internal network relay K8 is connected to the BMS board 201 to turn on and off the power supply to the BMS slave board 202 and the high voltage board 203 under the control of the BMS board 201. As can be seen from fig. 3 and the above description, the 12V power supply 14 directly supplies power to the BMS board 201, so that the BMS board 201 is always in a power-on state, and the power-on of the BMS slave board 202 and the high voltage board 203 is controlled by the BMS board 201, and only when the BMS board 201 decides to turn on the BMS slave board 202 and the high voltage board 203 to start working, the internal network relay K8 is controlled to be closed so that the BMS slave board 202 and the high voltage board 203 are powered on to work. If the department starts the BMS slave board 202 and the high-voltage board 203 to work, the BMS master board 201 CAN be sent corresponding simulation test instructions through the whole CAN bus.
According to the embodiment of the invention, the direct-current high-voltage power supply 11 is used for replacing a power battery of the electric automobile, high direct-current voltage can be provided, and by limiting the output power of the direct-current high-voltage power supply 11, the large current cannot appear in the test circuit 13 in the test platform 1, so that the requirement on a wire harness used by the test platform 1 is lowered. The fuse FU protects the circuit from exceeding a limit current and protects the test circuit 13. The capacitor C1 allows the test circuit 13 to pass current at the moment of high voltage application, and then the circuit is open, so that no large current surge occurs during closing and opening.
In the embodiment of the invention, whether the valid control signal is sent out by the BMS board 201 is verified by verifying whether each relay in the test circuit 13 is closed, the BMS board 201 controls the closing of each relay according to a power-on strategy, and the power-on strategy is formulated and adjusted according to the expected running state of the electric automobile.
In the embodiment of the invention, the high-voltage plate 203 is connected in series in the high-voltage circuit to measure the instantaneous circuit current when the circuit is switched on and off, and the high-voltage plate 203 collects the voltage values of various parts in the test circuit 13 through the voltage collection line, and further judges whether the corresponding relay is closed or not through judging the collected voltage. The voltage measurement function can be verified according to the voltage value collected by the high-voltage board 203 and the voltage value actually measured by the multimeter.
The insulation value to the vehicle body ground is the insulation resistance between the total positive and the total negative of the internal circuit measurement of the high-voltage board 203 to the vehicle body ground, and the verification of the insulation function of the high-voltage board 203 is realized by connecting different resistances between the total positive and the total negative to the vehicle body ground.
The cell voltage simulation and the temperature simulation of the BMS slave board 202 are provided by a battery simulator and an adjustable resistor, respectively, which are connected to the BMS slave board 202 through the battery information simulation interface 12, thereby achieving a function of verifying the cell voltage measurement and the temperature measurement of the BMS slave board 202.
In the embodiment of the invention, circuit elements such as a direct-current high-voltage power supply, a relay, a resistor, a capacitor, a fuse and the like adopted by the test platform of the battery management system of the electric automobile are common elements in a laboratory, and the test platform of the battery management system of the electric automobile is further built in the laboratory, so that the test of the battery management system of the electric automobile can be carried out independently without being separated from the whole electric automobile, the manufacturing cost of the electric automobile is saved, the test of the battery management system of the electric automobile can be completed before the electric automobile is manufactured, the test time of the battery management system is advanced, and one hand of data is provided for the manufacture of the electric automobile.
It should be understood that although the present description has been described in terms of various embodiments, not every embodiment includes only a single embodiment, and such description is for clarity purposes only, and those skilled in the art will recognize that the embodiments described herein can be combined as a whole to form other embodiments as would be understood by those skilled in the art.
The above-listed detailed description is only a specific description of a possible embodiment of the present invention and is not intended to limit the scope of the present invention, and equivalent embodiments or modifications such as combinations, divisions or repetitions of the features without departing from the technical spirit of the present invention are included in the scope of the present invention.
Claims (10)
1. A test platform (1) of an electric vehicle battery management system (2), wherein the battery management system (2) comprises a BMS mainboard (201), a BMS slave board (202) and a high-voltage board (203), and the BMS mainboard (201), the BMS slave board (202) and the high-voltage board (203) are in data communication through an intranet CAN bus, the test platform (1) is characterized by comprising:
the direct-current high-voltage power supply (11) is used for simulating the electric energy output of the storage battery of the electric automobile;
the battery information simulation interface (12) is connected to the BMS slave board (202) through a signal acquisition line, so that a voltage simulation signal and a temperature simulation signal are provided for the BMS slave board (202), wherein the voltage simulation signal is used for simulating the voltage of each battery pack in the electric automobile storage battery, and the temperature simulation signal is used for simulating the temperature of the electric automobile storage battery;
the test circuit (13) is connected to the direct-current high-voltage power supply (11) and is powered by the direct-current high-voltage power supply (11), the test circuit (13) is used for simulating a power output circuit of an electric automobile, and a plurality of test relays are connected in the test circuit (13) and are used for simulating relays used in the power output circuit; wherein,
the high-voltage board (203) is connected in series with the test circuit (13) to obtain the total current of the test circuit (13), and is connected to the test relays in the test circuit (13) through voltage acquisition lines to obtain the loop current of the test circuit (13) and the voltage of each test relay, and meanwhile, the total positive grounding end and the total negative grounding end of the high-voltage board (203) are grounded through different test resistors respectively to test the insulation function of the high-voltage board according to the resistance value of the test resistors;
BMS mainboard (201) connect in the control end of each test relay in test circuit (13), and BMS mainboard (201) are through whole car CAN bus receiving and dispatching whole car simulation communication information, BMS mainboard (201) are through charging CAN bus receiving and dispatching simulation communication information that charges, wherein, whole car simulation communication information is used for simulating the communication information between electric automobile's well accuse computer and the BMS mainboard, the simulation communication information that charges is used for simulating the electric automobile machine that charges and the communication information between the BMS mainboard.
2. The test platform (1) of the electric vehicle battery management system (2) according to claim 1, characterized in that the test circuit (13) comprises a positive switch branch, a negative switch branch, a charging and motor branch; wherein,
the positive switch branch, the charging and motor branch, the negative switch branch and the high-voltage board (203) are sequentially connected in series from the positive electrode to the negative electrode of the direct-current high-voltage power supply (11).
3. Test platform (1) of a battery management system (2) of an electric vehicle according to claim 2, characterized in that said positive switch branch comprises:
a positive switch relay (K1), wherein the positive switch relay (K1) is connected in series between the positive pole of the direct current high-voltage power supply (11) and the charging and motor branch, and the switch control end of the positive switch relay (K1) is connected to the BMS mainboard (201); wherein,
the high-voltage board (203) is connected to through the voltage acquisition line respectively positive pole switch relay (K1) connect in the one end of direct current high voltage power supply (11) and positive pole switch relay (K1) connect in the one end of charging and motor branch road, in order to gather respectively positive pole switch relay (K1) connect in the magnitude of voltage of direct current high voltage power supply (11) one end and positive pole switch relay (K1) connect in the magnitude of voltage of charging and motor branch road one end.
4. Test platform (1) of an electric vehicle battery management system (2) according to claim 2, characterized in that the negative switch branch comprises:
a negative switch relay (K2), the negative switch relay (K2) is connected in series between the charging and motor branch and a high voltage board (203), and the switch control end of the negative switch relay (K2) is connected to the BMS main board (201); wherein,
the high-voltage board (203) is connected to the negative switch relay (K2) through a voltage collecting line and is connected to one end of the charging and motor branch circuit so as to collect the voltage value of the negative switch relay (K2) connected to one end of the charging and motor branch circuit.
5. Test platform (1) of a battery management system (2) of an electric vehicle according to claim 2, characterized in that:
the charging and motor branch comprises a charging test branch and a first motor test branch; wherein,
the charging test branch and the first motor test branch are connected in parallel between the positive switch branch and the negative switch branch;
the charging test branch comprises a charging relay (K3), and the charging relay (K3) is directly connected between the positive pole switch branch and the negative pole switch branch;
the first motor test branch comprises a first motor positive relay (K4), a first motor pre-charging relay (K5) and a first motor pre-charging resistor (R1); wherein,
the first motor positive relay (K4) is directly connected between the positive switch branch and the negative switch branch;
the first motor pre-charging relay (K5) and the first motor pre-charging resistor (R1) are connected in series between the positive pole switch branch and the negative pole switch branch;
the switch control end of the charging relay (K3), the switch control end of the first motor positive relay (K4) and the switch control end of the first motor pre-charging relay (K5) are all connected to the BMS mainboard (201);
the high-voltage board (203) is connected to one end of the charging relay (K3) connected to the negative switch branch through a voltage acquisition line so as to acquire a voltage value of the charging relay (K3) connected to one end of the negative switch branch.
6. Test platform (1) of a battery management system (2) of an electric vehicle according to claim 5, characterized in that:
the charging and motor branch also comprises a second motor testing branch, and the second motor testing branch, the charging testing branch and the first motor testing branch are simultaneously connected in parallel between the positive switch branch and the negative switch branch; wherein,
the second motor test branch comprises a second motor positive relay (K6), a second motor pre-charging relay (K7) and a second motor pre-charging resistor (R2); wherein,
the second motor positive relay (K6) is directly connected between the positive switch branch and the negative switch branch;
the second motor pre-charging relay (K7) and a second motor pre-charging resistor (R2) are connected in series between the positive pole switch branch and the negative pole switch branch;
and the switch control end of the second motor positive relay (K6) and the switch control end of the second motor pre-charging relay (K7) are connected to the BMS mainboard (201).
7. Test platform (1) of a battery management system (2) of an electric vehicle according to claim 2, characterized in that:
the test circuit (13) further comprises a capacitor (C1);
the capacitor (C1) is connected in series between the charging and motoring branch and the negative switching branch.
8. Test platform (1) of a battery management system (2) of an electric vehicle according to claim 7, characterized in that:
the test circuit (13) further comprises a Fuse (FU);
the Fuse (FU) is connected in series between the charging and motor branch and a capacitor (C1); alternatively, the Fuse (FU) is connected in series between the capacitor (C1) and the negative switch branch.
9. Test platform (1) of a battery management system (2) of an electric vehicle according to claim 1, characterized in that:
the test circuit (13) further comprises a 12V power supply (14); wherein,
the BMS motherboard (201), BMS slave board (202), and high voltage board (203) are powered by the 12V power supply (14).
10. Test platform (1) of a battery management system (2) of an electric vehicle according to claim 9, characterized in that:
the 12V power supply (14) directly supplies power to the BMS motherboard (201);
the 12V power supply (14) supplies power to the BMS slave board (202) and the high-voltage board (203) through an intranet relay (K8); and,
the control terminal of the intranet relay (K8) is connected to the BMS main board (201) to turn on and off power supply to the BMS slave board (202) and high voltage board (203) under the control of the BMS main board (201).
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