New energy electric vehicle and rack test system thereof

Abstract

The invention provides a new energy electric vehicle and a rack test system thereof. The system comprises an upper computer, a high-voltage simulation unit, a low-voltage simulation unit, an original vehicle BMS controller and an original vehicle load. The high-voltage simulation unit is connected with the upper computer, the original vehicle BMS controller and the original vehicle load. The low-voltage simulation unit is connected with the upper computer and the original vehicle BMS controller. The high-voltage simulation unit and the low-voltage simulation unit are controlled by the upper computer, and the upper computer is used for controlling the high-voltage simulation unit to simulate a high-voltage part of an original vehicle battery pack of the new energy electric vehicle and controlling the low-voltage simulation unit to simulate a low-voltage part of the original vehicle battery pack. The upper computer, the high-voltage simulation unit and the low-voltage simulation unit can be used for replacing an original vehicle battery pack in the rack test system of the new energy electric vehicle, and the test can be completed without the original vehicle battery pack of the new energy electric vehicle, so that the problem that the battery pack needs to be purchased at high price in the prior art is solved; and after testing, no secondary utilization value exists, and hazardous waste treatment needs to be carried out.

Description

Technical Field

[0001] The present invention relates to the technical field of automobile testing, and in particular to a new energy electric vehicle and a bench testing system thereof. Background Art

[0002] With the continuous development and progress of new energy technology, new energy vehicles are becoming increasingly popular in daily life. Compared with traditional internal combustion engine vehicles, new energy electric vehicles have the advantages of zero emissions, high energy conversion efficiency, and low operating costs. Among them, the vehicle drive system of new energy electric vehicles is a key system component of the powertrain of new energy electric vehicles. Its performance parameters, control accuracy and reliability directly affect the power, economy and comfort of the whole vehicle.

[0003] The vehicle drive system of a fuel vehicle is mainly composed of an engine and a gearbox, while the vehicle drive system of a new energy electric vehicle is mainly composed of a battery, a motor and an electronic control. In order to ensure the safety and efficient operation of new energy electric vehicles, the performance of new energy electric vehicles needs to be tested and evaluated during the research and development or performance testing phase of new energy electric vehicles.

[0004] At present, the bench test systems for new energy electric vehicles all use the original vehicle battery packs to integrate into the whole vehicle bench for testing. However, using the original vehicle battery packs for testing requires purchasing them from battery pack suppliers at high prices, and there is no secondary utilization value after testing, so they can only be treated as hazardous waste. Summary of the invention

[0005] In this regard, the present application provides a new energy electric vehicle and a bench test system thereof to solve the problem that the existing original vehicle battery pack testing needs to be purchased from the battery pack supplier at a high price, and has no secondary utilization value after testing and can only be treated as hazardous waste.

[0006] To achieve the above objectives, the embodiments of the present invention provide the following technical solutions:

[0007] The first aspect of the present application discloses a bench test system for a new energy electric vehicle, comprising: a host computer, a high voltage simulation unit, a low voltage simulation unit, an original vehicle BMS controller and an original vehicle load;

[0008] The high-voltage simulation unit is respectively connected to the host computer, the original vehicle BMS controller and the original vehicle load;

[0009] The low voltage simulation unit is connected to the host computer and the original vehicle BMS controller respectively;

[0010] The high-voltage simulation unit and the low-voltage simulation unit are controlled by the host computer, and the host computer is used to control the high-voltage simulation unit to simulate the high-voltage part of the original battery pack of the new energy electric vehicle and the low-voltage simulation unit to simulate the low-voltage part of the original battery pack.

[0011] Optionally, in the above-mentioned bench test system for new energy electric vehicles, the high-voltage simulation unit includes: a bidirectional high-voltage source and a simulated high-voltage junction box;

[0012] The bidirectional high-voltage source is connected to the host computer and the simulated high-voltage junction box respectively, and the simulated high-voltage junction box is connected to the host computer, the original vehicle BMS controller and the original vehicle load respectively;

[0013] The bidirectional high-voltage source and the simulated high-voltage junction box are controlled by the host computer, and the host computer is used to control the bidirectional high-voltage source and the simulated high-voltage junction box to simulate the high-voltage part of the original battery pack of the new energy electric vehicle.

[0014] Optionally, in the bench test system for the new energy electric vehicle, the host computer and the bidirectional high-voltage source adopt a first communication connection, and the host computer and the simulation high-voltage junction box adopt a second communication connection.

[0015] Optionally, in the above-mentioned bench test system for new energy electric vehicles, the first communication is TCP / IP, and the second communication is CAN.

[0016] Optionally, in the bench test system of the new energy electric vehicle, the bidirectional high-voltage source is a programmable bidirectional high-voltage DC power supply, and the simulated high-voltage junction box is obtained by simulation design based on the high-voltage circuit diagram of the high-voltage junction box of the new energy electric vehicle.

[0017] Optionally, in the bench test system for the new energy electric vehicle, the host computer is used to control the bidirectional high voltage source and the simulated high voltage junction box to simulate the high voltage part of the original battery pack of the new energy electric vehicle, including:

[0018] The host computer is used to control the bidirectional high-voltage source to output high-voltage electrical signals and the on-off of each relay in the simulated high-voltage junction box.

[0019] Optionally, in the bench test system for the new energy electric vehicle, the low voltage simulation unit comprises: a battery simulator, the battery simulator is controlled by the host computer, and the battery simulator and the host computer are connected by a first communication;

[0020] The host computer is used to control the low-voltage simulation unit to simulate the low-voltage part of the original vehicle battery pack, including: the host computer is used to control the battery simulator to output a low-voltage electrical signal.

[0021] Optionally, in the bench test system for the new energy electric vehicle, the original vehicle BMS controller is used to perform high-voltage sampling on the high-voltage simulation unit and to perform low-voltage sampling on the low-voltage simulation unit.

[0022] Optionally, in the bench test system for the new energy electric vehicle, the host computer is also used to read back the data of the original vehicle BMS controller, and obtain the battery performance test result of the new energy electric vehicle according to the read-back data.

[0023] The second aspect of the present application discloses a new energy electric vehicle, which uses a bench test system for a new energy electric vehicle as described in any one of the items disclosed in the first aspect to perform a battery performance test.

[0024] The present invention provides a bench test system for a new energy electric vehicle, comprising: a host computer, a high-voltage simulation unit, a low-voltage simulation unit, an original vehicle BMS controller and an original vehicle load; the high-voltage simulation unit is respectively connected to the host computer, the original vehicle BMS controller and the original vehicle load; the low-voltage simulation unit is respectively connected to the host computer and the original vehicle BMS controller; the high-voltage simulation unit and the low-voltage simulation unit are controlled by the host computer, and the host computer is used to control the high-voltage simulation unit to simulate the high-voltage part of the original vehicle battery pack of the new energy electric vehicle and the low-voltage simulation unit to simulate the low-voltage part of the original vehicle battery pack; the host computer, the high-voltage simulation unit and the low-voltage simulation unit can be used to replace the original vehicle battery pack in the bench test system of the new energy electric vehicle, and the test can be completed without the original vehicle battery pack of the new energy electric vehicle, thereby solving the problem that the existing original vehicle battery pack test needs to be purchased from the battery pack supplier at a high price, and has no secondary utilization value after the test and can only be treated as hazardous waste. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0026] Figure 1 A schematic diagram of the structure of a bench test system for a new energy electric vehicle provided in an embodiment of the present application;

[0027] Figure 2A schematic diagram of the structure of another bench test system for new energy electric vehicles provided in an embodiment of the present application;

[0028] Figure 3 A circuit diagram of a simulated high-voltage junction box provided in an embodiment of the present application;

[0029] Figure 4 A schematic diagram of a human-computer interaction interface of a host computer provided in an embodiment of the present application;

[0030] Figure 5 A schematic diagram of the specific structure corresponding to a bench test system for a new energy electric vehicle provided in an embodiment of the present application. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0032] The embodiment of the present application provides a new energy electric vehicle and a bench test system thereof to solve the problem that the existing original vehicle battery pack testing needs to be purchased from the battery pack supplier at a high price, and has no secondary utilization value after testing and can only be treated as hazardous waste.

[0033] See also Figure 1 , the bench test system of the new energy electric vehicle mainly includes: a host computer 101, a high voltage simulation unit 102, a low voltage simulation unit 103, an original vehicle BMS controller 104 and an original vehicle load 105;

[0034] The high voltage simulation unit 102 is respectively connected to the host computer 101, the original vehicle BMS controller 104 and the original vehicle load 105;

[0035] The low voltage simulation unit 103 is connected to the host computer 101 and the original vehicle BMS controller 104 respectively;

[0036] The high voltage simulation unit 102 and the low voltage simulation unit 103 are controlled by the host computer 101, and the host computer 101 is used to control the high voltage simulation unit 102 to simulate the high voltage part of the original battery pack of the new energy electric vehicle and the low voltage simulation unit 103 to simulate the low voltage part of the original battery pack.

[0037] In practical applications, the original vehicle BMS controller 104 may be a BMS controller of a new energy electric vehicle, which is mainly used for performing high voltage sampling on the high voltage simulation unit 102 and performing low voltage sampling on the low voltage simulation unit 103 .

[0038] Among them, by performing high-voltage sampling on the high-voltage simulation unit 102, the high-voltage electrical signal simulated by the high-voltage simulation unit 102 during the battery testing process can be obtained, such as the total voltage of the battery pack, the total current of the battery pack, etc., which can be determined according to the application environment and user needs, and are all within the protection scope of this application.

[0039] Similarly, by performing low-voltage sampling through the low-voltage simulation unit 103, the low-voltage electrical signal simulated by the low-voltage simulation unit 103 during the battery testing process can be obtained, such as battery cell voltage, battery cell temperature, etc., which can be determined according to the application environment and user needs, and are all within the protection scope of this application.

[0040] In some embodiments, since the original battery pack in the new energy electric vehicle is always integrated with the high-voltage junction box in the new energy electric vehicle, in order to implement the test of the new energy electric vehicle in which the original battery pack and the high-voltage junction box are integrated, such as Figure 2 As shown, the high-voltage simulation unit 102 may include: a bidirectional high-voltage source 1021 and a simulated high-voltage junction box 1022; the bidirectional high-voltage source 1021 is respectively connected to the host computer 101 and the simulated high-voltage junction box 1022, and the simulated high-voltage junction box 1022 is respectively connected to the host computer 101, the original vehicle BMS controller 104 and the original vehicle load 105; the bidirectional high-voltage source 1021 and the simulated high-voltage junction box 1022 are controlled by the host computer 101, and the host computer 101 is used to control the bidirectional high-voltage source 1021 and the simulated high-voltage junction box 1022 to realize the simulation of the high-voltage part of the original vehicle battery pack of the new energy electric vehicle.

[0041] In actual applications, the host computer 101 is used to control the bidirectional high-voltage source 1021 and the simulated high-voltage junction box 1022 to simulate the high-voltage part of the original battery pack of the new energy electric vehicle, specifically including: the host computer 101 is used to control the bidirectional high-voltage source 1021 to output high-voltage electrical signals and the on and off of each relay in the simulated high-voltage junction box 1022.

[0042] It should be noted that the host computer 101 is used to control the bidirectional high-voltage source 1021 to output high-voltage electrical signals, which may include the total voltage of the battery pack, the total current of the battery pack, and other high-voltage electrical signals required for testing new energy electric vehicles.

[0043] In a specific application, the bidirectional high-voltage source 1021 may be a programmable bidirectional high-voltage direct current power supply; of course, it is not limited thereto, and may also be determined depending on the application environment and user needs, all within the protection scope of this application.

[0044] In some embodiments, the simulated high-voltage junction box 1022 can be designed and simulated based on a high-voltage circuit diagram of a high-voltage junction box (Power Distribution Unit, PDU) of a new energy electric vehicle.

[0045] For example, the circuit diagram of the simulated high-voltage junction box 1022 can be obtained by performing simulation design based on the high-voltage circuit diagram of the high-voltage junction box of the new energy electric vehicle. Figure 3 The black relay in the figure is a relay in the high-voltage circuit of the simulated original vehicle, the blue relay connected in parallel with the black relay is a relay used to simulate the relay adhesion fault, and the blue relay connected in series with the black relay is a relay used to simulate the electric drive failure to attract.

[0046] It should be noted that the high-voltage junction box of new energy electric vehicles is the high-voltage distribution unit, which is responsible for the power distribution and management in the high-voltage system of new energy electric vehicles, providing charging and discharging control, high-voltage component power-on control, circuit overload and short-circuit protection, high-voltage sampling, low-voltage control and other functions for the entire vehicle, protecting and monitoring the operation of the high-voltage system.

[0047] It can be simply understood as: there are multiple high-voltage relays in the PDU, and the original vehicle BMS controller controls each relay in the PDU to energize and output high voltage.

[0048] Taking the programmable bidirectional high-voltage DC power supply as an example, the control end of the programmable bidirectional high-voltage DC power supply is connected to the host computer 101, and the output end of the programmable bidirectional high-voltage DC power supply is connected to the power supply end of the simulated high-voltage junction box 1022 to provide a high-voltage electrical signal to the simulated high-voltage junction box 1022.

[0049] It should be noted that, in practice, the host computer 101 and the bidirectional high-voltage source 1021 may adopt a first communication connection, and the host computer 101 and the simulated high-voltage junction box 1022 may adopt a second communication connection.

[0050] The first communication and the second communication may be the same or different, depending on the application environment and user requirements, and are within the protection scope of this application. For example, the first communication may be TCP / IP, and the second communication may be CAN.

[0051] In some embodiments, the low voltage simulation unit 103 may include: a battery simulator, the battery simulator is controlled by the host computer 101, and the battery simulator and the host computer 101 are connected by a first communication;

[0052] The host computer 101 is used to control the low voltage simulation unit 103 to simulate the low voltage part of the original vehicle battery pack, including: the host computer 101 is used to control the battery simulator to output a low voltage electrical signal.

[0053] It should be noted that the host computer 101 is used to control the battery simulator to output low-voltage electrical signals, which may include battery cell voltage, battery cell temperature and other low-voltage electrical signals required for testing new energy electric vehicles.

[0054] In specific applications, a battery simulator can be used to provide cell voltage sampling points and cell temperature sampling points that are connected to the sampling interface of the original vehicle's BMS controller, and the cell voltage and cell temperature are obtained by sampling the original vehicle's BMS controller.

[0055] The original car's BMS controller will uniformly manage and process the battery cell voltage and battery cell temperature after sampling. For example, identifying that the battery cell temperature at a certain battery cell temperature sampling point is too high will trigger the over-temperature protection mechanism and control the high-voltage circuit to cut off power. It is understandable that the role of the original car's BMS controller is to monitor the battery of new energy electric vehicles to ensure the safe operation of the system.

[0056] It should also be noted that the upper computer 101 can be controlled to output corresponding high-voltage and low-voltage electrical signals to the programmable bidirectional high-voltage DC source power supply and the battery simulator, thereby simulating the relevant sampling of the battery pack of the new energy electric vehicle.

[0057] For example, the human-computer interaction interface of the host computer 101 may be as follows: Figure 4 As shown, it mainly includes three parts: single cell voltage simulator, single cell temperature simulator, and power supply control. Among them, the single cell voltage simulator and the single cell temperature simulator belong to battery simulators. By setting the parameters of the single cell voltage simulator, the simulation of different single cell voltages can be realized. Similarly, by setting the parameters of the single cell temperature simulator, the simulation of different single cell temperatures can be realized. In power supply control, the parameters of the low voltage source_BMS controller power supply can be set to change the power supply parameters of the BMS controller; by setting the parameters of the high voltage source_simulated total pressure, the total voltage of the battery pack of the original vehicle load 105 output by the programmable bidirectional high voltage DC source power supply can be modified; by setting the parameters of the current source_simulated total current, the total current of the battery pack of the original vehicle load 105 output by the programmable bidirectional high voltage DC source power supply can be modified.

[0058] It should be noted that, assuming that the first communication can be TCP / IP and the second communication can be CAN, the specific structure of the bench test system for new energy electric vehicles is as follows: Figure 5 shown.

[0059] In some embodiments, the original vehicle load 105 may include a motor, heater, air conditioner, DCDC, etc. of a new energy electric vehicle, which can be determined according to the application environment and user needs, and are all within the protection scope of this application.

[0060] In some embodiments, the host computer 101 can also be used to read back the data of the original vehicle BMS controller 104, and obtain the battery performance test results of the new energy electric vehicle based on the read back data; wherein, reference can be made to the relevant technology of battery pack testing of new energy electric vehicles to obtain the battery performance test results of the new energy electric vehicle based on the read back data.

[0061] Based on the above principle, the bench test system of the new energy electric vehicle provided in this embodiment includes: a host computer 101, a high-voltage simulation unit 102, a low-voltage simulation unit 103, an original vehicle BMS controller 104 and an original vehicle load 105; the high-voltage simulation unit 102 is respectively connected to the host computer 101, the original vehicle BMS controller 104 and the original vehicle load 105; the low-voltage simulation unit 103 is respectively connected to the host computer 101 and the original vehicle BMS controller 104; the high-voltage simulation unit 102 and the low-voltage simulation unit 103 are controlled by the host computer 101, and the host computer 101 is used to control The high-voltage simulation unit 102 simulates the high-voltage part of the original battery pack of the new energy electric vehicle, and the low-voltage simulation unit 103 simulates the low-voltage part of the original battery pack. The host computer 101, the high-voltage simulation unit 102 and the low-voltage simulation unit 103 can be used to replace the original battery pack in the bench test system of the new energy electric vehicle. The test can be completed without the original battery pack of the new energy electric vehicle, which solves the problem that the existing original battery pack test needs to be purchased from the battery pack supplier at a high price, and has no secondary utilization value after the test and can only be treated as hazardous waste.

[0062] It is worth mentioning that the inventors have found that if the original vehicle battery pack is used for testing, the relevant tests can only be started when the original vehicle battery pack arrives. It is impossible to test in advance to shorten the test cycle, and the bench test systems for new energy electric vehicles are all carried out in the laboratory. The original vehicle battery pack has the risk of fire and explosion, posing a safety hazard.

[0063] The bench test system for new energy electric vehicles provided in the present application can utilize the host computer 101, the high-voltage simulation unit 102, and the low-voltage simulation unit 103 to replace the original vehicle battery pack in the bench test system for the new energy electric vehicle. The test can be completed without the original vehicle battery pack of the new energy electric vehicle. There is no need to purchase the original vehicle battery pack, nor is there any need to wait for the original vehicle battery pack to arrive before starting relevant tests. Relevant tests can be started according to the high-voltage circuit schematic diagram of the original vehicle battery pack, which can shorten the test cycle. In addition, since the original vehicle battery pack in the bench test system for the new energy electric vehicle is replaced by the host computer 101, the high-voltage simulation unit 102, and the low-voltage simulation unit 103, the risks of fire and explosion of the original vehicle battery pack can be avoided, safety hazards are eliminated, and the safety of the test is improved.

[0064] To sum up the above, the present application can construct simulation equipment based on the high-voltage circuit of the tested vehicle model to achieve battery pack replacement. It has strong reusability and flexibility, can advance bench testing, improve test efficiency, reduce bench testing costs, and ensure test safety.

[0065] Optionally, another embodiment of the present application further provides a new energy electric vehicle, which uses the bench test system for the new energy electric vehicle described in the above embodiment to perform battery performance testing.

[0066] In practical applications, the new energy electric vehicles in this application refer to vehicles that use unconventional vehicle fuels as their power source, mainly including pure electric vehicles and fuel cell electric vehicles that use all non-petroleum fuels, as well as hybrid electric vehicles, ethanol gasoline vehicles and other vehicles that partially use non-petroleum fuels.

[0067] Of course, it is not limited to this, and can also be determined according to the application environment and user needs. As long as the new energy electric vehicle uses a battery as a power source, the bench test system for the new energy electric vehicle described in the above embodiment can be used to perform battery performance testing.

[0068] In practical applications, new energy electric vehicles can use the bench test system of new energy electric vehicles to test battery performance, which can avoid the following problems:

[0069] 1. The existing original vehicle battery pack testing requires high-priced purchases from battery pack suppliers, and after testing, there is no secondary utilization value and it can only be treated as hazardous waste;

[0070] 2. The relevant tests can only be started when the original vehicle battery pack arrives, and it is not possible to test in advance to shorten the test cycle;

[0071] 3. The bench test systems for new energy electric vehicles are all carried out in laboratories. The original vehicle battery packs have risks such as fire and explosion, posing safety hazards.

[0072] It should be noted that the relevant description of the bench test system for new energy electric vehicles can be found in the above corresponding embodiments, which will not be repeated here.

[0073] It should also be noted that for relevant descriptions of new energy electric vehicles, reference can also be made to the existing related technologies, and this application will not go into details one by one.

[0074] In combination with the new energy electric vehicle and the bench test system for the new energy electric vehicle provided in the above embodiments, the specific implementation process of the battery pack test of the new energy electric vehicle in practice can be as follows:

[0075] Step 1: Develop and produce simulation equipment based on the high-voltage circuit diagram of the high-voltage junction box of the vehicle under test.

[0076] In actual applications, the vehicle model under test is the model corresponding to the new energy electric vehicle that needs to perform battery pack testing.

[0077] For example, the circuit diagram of the simulated high-voltage junction box 1022 can be obtained by performing simulation design based on the high-voltage circuit diagram of the high-voltage junction box of the new energy electric vehicle. Figure 3 shown.

[0078] Step 2: Integrate a programmable bidirectional high-voltage DC power supply. The programmable bidirectional high-voltage DC power supply is used to provide electrical signals and power for high-voltage power supply and is connected to the input end of the high-voltage junction box (that is, the battery pack end in the original vehicle).

[0079] Step 3: Use a battery simulator to provide the cell voltage sampling point and the cell temperature sampling point to connect to the sampling interface of the BMS controller.

[0080] Step 4: Use the host computer to control the programmable bidirectional high-voltage DC power supply and battery simulator, output the corresponding high-voltage electrical signals and low-voltage electrical signals, and perform relevant sampling and simulation on the battery pack.

[0081] It should be noted that the above-mentioned test process is only a specific test process for new energy electric vehicles on the bench test system of new energy electric vehicles. In actual operation, the test process can also be adjusted according to relevant test specifications. As long as the bench test system of the new energy electric vehicle provided by this application is used for testing, it is within the protection scope of this application.

[0082] The features recorded in the various embodiments in this specification can be replaced or combined with each other, and the same and similar parts between the various embodiments can be referred to each other, and each embodiment focuses on the differences from other embodiments. In particular, for the system or system embodiment, since it is basically similar to the method embodiment, the description is relatively simple, and the relevant parts can be referred to the partial description of the method embodiment. The system and system embodiments described above are only schematic, wherein the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the modules can be selected according to actual needs to achieve the purpose of the scheme of this embodiment. Ordinary technicians in this field can understand and implement it without creative work. Professionals can also further realize that the units and algorithm steps of each example described in combination with the embodiments disclosed in this article can be implemented in electronic hardware, computer software or a combination of the two. In order to clearly illustrate the interchangeability of hardware and software, the composition and steps of each example have been generally described in the above description according to the function. Whether these functions are executed in hardware or software depends on the specific application and design constraints of the technical solution. Professionals and technicians may use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of the present invention.

[0083] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

[0084] It should also be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

Claims

1. A bench test system for new energy electric vehicles, characterized in that: include: Host computer, high voltage simulation unit, low voltage simulation unit, original vehicle BMS controller and original vehicle load; The high-voltage simulation unit is respectively connected to the host computer, the original vehicle BMS controller and the original vehicle load; The low voltage simulation unit is connected to the host computer and the original vehicle BMS controller respectively; The high-voltage simulation unit and the low-voltage simulation unit are controlled by the host computer, and the host computer is used to control the high-voltage simulation unit to simulate the high-voltage part of the original battery pack of the new energy electric vehicle and the low-voltage simulation unit to simulate the low-voltage part of the original battery pack.

2. The bench test system for new energy electric vehicles according to claim 1, characterized in that: The high voltage simulation unit comprises: a bidirectional high voltage source and a simulated high voltage junction box; The bidirectional high-voltage source is connected to the host computer and the simulated high-voltage junction box respectively, and the simulated high-voltage junction box is connected to the host computer, the original vehicle BMS controller and the original vehicle load respectively; The bidirectional high-voltage source and the simulated high-voltage junction box are controlled by the host computer, and the host computer is used to control the bidirectional high-voltage source and the simulated high-voltage junction box to simulate the high-voltage part of the original battery pack of the new energy electric vehicle.

3. The bench test system for new energy electric vehicles according to claim 2, characterized in that: The host computer and the bidirectional high-voltage source adopt a first communication connection, and the host computer and the simulation high-voltage junction box adopt a second communication connection.

4. The bench test system for new energy electric vehicles according to claim 3, characterized in that: The first communication is TCP / IP, and the second communication is CAN.

5. The bench test system for new energy electric vehicles according to claim 2, characterized in that: The bidirectional high-voltage source is a program-controlled bidirectional high-voltage direct current power supply, and the simulated high-voltage junction box is obtained by simulation design based on the high-voltage circuit diagram of the high-voltage junction box of the new energy electric vehicle.

6. The bench test system for new energy electric vehicles according to claim 2, characterized in that: The host computer is used to control the bidirectional high-voltage source and the simulated high-voltage junction box to simulate the high-voltage part of the original battery pack of the new energy electric vehicle, including: The host computer is used to control the bidirectional high-voltage source to output high-voltage electrical signals and the on-off of each relay in the simulated high-voltage junction box.

7. The bench test system for new energy electric vehicles according to claim 1, characterized in that: The low voltage simulation unit comprises: a battery simulator, the battery simulator is controlled by the host computer, and the battery simulator and the host computer are connected by a first communication; The host computer is used to control the low-voltage simulation unit to simulate the low-voltage part of the original vehicle battery pack, including: the host computer is used to control the battery simulator to output a low-voltage electrical signal.

8. The bench test system for new energy electric vehicles according to any one of claims 1 to 7, characterized in that: The original vehicle BMS controller is used to perform high-voltage sampling on the high-voltage simulation unit and to perform low-voltage sampling on the low-voltage simulation unit.

9. The bench test system for new energy electric vehicles according to any one of claims 1 to 7, characterized in that: The host computer is also used to read back the data of the original vehicle BMS controller, and obtain the battery performance test result of the new energy electric vehicle according to the read-back data.

10. A new energy electric vehicle, characterized in that: The new energy electric vehicle uses the bench test system for the new energy electric vehicle as described in any one of claims 1 to 9 to perform battery performance testing.

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