Power battery simulation system

Abstract

The utility model relates to a power battery simulation system. The power battery simulation system is characterized in that the input end of a power management assembly is connected with the output end of a first power supply; the input end of the first PDU is connected with the output end of the power management assembly, the first to fourth output ends of the first PDU are correspondingly connected with the input ends of the first to fourth battery simulation assemblies respectively, and the fifth output end of the first PDU is connected with the input end of the second PDU; the first PDU respectively adjusts the voltage and temperature of the first to fourth battery simulation components according to the current simulation demand; the first to fourth output ends of the second PDU are correspondingly connected with the input ends of the fifth to eighth battery simulation components respectively, and the second PDU adjusts the voltage and temperature of the fifth to eighth battery simulation components respectively according to the current simulation requirement. Therefore, the problems that various testing requirements cannot be met when a real battery pack is used for function testing, and fire and explosion risks exist in the testing process are solved, and the authenticity of the battery simulation system is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of power batteries, in particular to a power battery simulation system. Background Art

[0002] Labcar electrical based semi-physical simulation technology is a method for testing the functionality, system integration and communication of electronic control units.

[0003] In the related technologies, the bench function test of pure electric vehicles mostly adopts an integrated bench function test structure, that is, the high and low voltage systems are built at the same time, and the power system is tested with a real battery pack. However, this solution cannot perform high-temperature and low-temperature battery charging tests in a normal temperature laboratory environment, nor can it perform battery overvoltage and undervoltage function tests. In addition, the battery packs during the test are usually not in mass production, and some safety performance does not meet the standards. There is a risk of fire and explosion, which needs to be solved urgently. Utility Model Content

[0004] The utility model provides a power battery simulation system to solve the problems in related technologies, that the power battery function test cannot be carried out in a normal temperature test room environment for high temperature and low temperature charging test of the battery, and the battery overvoltage and undervoltage function test cannot be realized, and the battery pack during the test is usually in a non-mass production state, some safety performance does not meet the standards, and there is a risk of fire and explosion. The authenticity of the battery simulation system is realized, a comprehensive test platform is provided for the power battery system, and the SOC (State of Charge) of the power battery is reduced.

[0005] The present invention provides a power battery simulation system, including: a power management component, a first power distribution unit PDU (Power Distribution Unit), a second power distribution unit PDU and first to eighth battery simulation components, wherein:

[0006] The input end of the power management component is connected to the output end of the first power supply;

[0007] The input end of the first PDU is connected to the output end of the power management component, the first to fourth output ends of the first PDU are respectively connected to the input ends of the first to fourth battery simulation components, the fifth output end of the first PDU is connected to the input end of the second PDU, and the first PDU adjusts the voltage and temperature of the first to fourth battery simulation components according to the current simulation requirements;

[0008] The first to fourth output ends of the second PDU are respectively connected to the input ends of the fifth to eighth battery simulation components, and the second PDU adjusts the voltage and temperature of the fifth to eighth battery simulation components according to current simulation requirements.

[0009] Optionally, the power battery simulation system further includes:

[0010] a first chassis, an input end of the first chassis being connected to a fifth output end of the second PDU;

[0011] a second chassis, an input end of the second chassis being connected to a sixth output end of the second PDU;

[0012] The first board output interface of the first chassis is connected to the first board output interface of the second chassis, and the second board output interface of the first chassis is connected to the second board output interface of the second chassis.

[0013] Optionally, the power battery simulation system further includes:

[0014] A second power supply, wherein an input end of the second power supply is connected to an output end of the high voltage power supply, and an output end of the second power supply is connected to an input end of the power management component.

[0015] Optionally, an input end of the first power supply is connected to a mains power output end or an output end of the second power supply.

[0016] Optionally, the second power supply is a feedback high-voltage power supply.

[0017] Optionally, the power battery simulation system further includes:

[0018] First to sixth connectors, the first connection end and the second connection end of the first connector are respectively connected to the output end of the first battery simulation component and the output end of the second battery simulation component, the first connection end and the second connection end of the second connector are respectively connected to the output end of the third battery simulation component and the output end of the fourth battery simulation component, and the first connection end and the second connection end of the third connector are respectively connected to the output end of the fifth battery simulation component and the output end of the sixth battery simulation component;

[0019] The first connection end and the second connection end of the fourth connector are respectively connected to the output end of the seventh battery simulation component and the output end of the eighth battery simulation component, the first connection end of the fifth connector is connected to the first board output interface of the first chassis and the second board output interface of the first chassis, and the first connection end and the second connection end of the sixth connector are connected to the third board output interface of the second chassis.

[0020] Optionally, the power battery simulation system further includes:

[0021] A switch, wherein the switch is respectively connected to the output ends of the first to eighth battery simulation components, the output end of the second chassis, the output end of the second power supply, the sixth connector, and the seventh output end of the second PDU.

[0022] Optionally, the power battery simulation system further includes:

[0023] A heat dissipation component is connected to the sixth output terminal of the first PDU.

[0024] Optionally, the power battery simulation system further includes:

[0025] A cabinet is used for fixedly installing the power management component, the first PDU, the second PDU and the first to eighth battery simulation components.

[0026] Optionally, the power battery simulation system further includes:

[0027] A communication component, wherein the communication component is connected to the first to sixth connectors, and the first to sixth connectors use the communication component to send the single cell voltage values ​​of the first to eighth battery simulation components to a preset host computer.

[0028] Therefore, the utility model connects the input end of the power management component to the output end of the first power supply, connects the input end of the first PDU to the output end of the power management component, the first to fourth output ends of the first PDU are respectively connected to the input ends of the first to fourth battery simulation components, the fifth output end of the first PDU is connected to the input end of the second PDU, the first PDU adjusts the voltage and temperature of the first to fourth battery simulation components according to the current simulation requirements, the first to fourth output ends of the second PDU are respectively connected to the input ends of the fifth to eighth battery simulation components, and the second PDU adjusts the voltage and temperature of the fifth to eighth battery simulation components according to the current simulation requirements. Therefore, the problem that when using a real battery pack for functional testing, various test requirements cannot be met, and there is a risk of fire and explosion during the test process is solved, the authenticity of the battery simulation system is achieved, a comprehensive test platform is provided for the power battery system, and the power battery SOC is reduced.

[0029] Additional aspects and advantages of the present invention will be given in part in the following description and in part will become apparent from the following description or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the following description of the embodiments in conjunction with the accompanying drawings, in which:

[0031] Figure 1 A schematic diagram of a power battery simulation system provided according to an embodiment of the utility model;

[0032] Figure 2 A schematic diagram of the layout of a power battery simulation system according to a specific embodiment of the utility model;

[0033] Figure 3 A schematic diagram of signal connection of a power battery simulation system according to a specific embodiment of the utility model;

[0034] Figure 4 is a schematic diagram of a connector according to a specific embodiment of the utility model;

[0035] Figure 5 It is a schematic diagram of a connector connection device according to a specific embodiment of the utility model;

[0036] Figure 6 A schematic diagram of a switch connection according to a specific embodiment of the utility model;

[0037] Figure 7 It is a schematic diagram of the front view, rear view, and rear view (opened) of a power battery simulation system according to a specific embodiment of the utility model. DETAILED DESCRIPTION

[0038] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0039] The power battery simulation system of the embodiment of the utility model is described below with reference to the accompanying drawings. In view of the problem mentioned in the above background technology that when using a real battery pack for functional testing, various test requirements cannot be met, and there is a risk of fire and explosion during the test process, the utility model provides a power battery simulation system, which includes: a power management component, a first power distribution unit PDU, a second power distribution unit PDU and first to eighth battery simulation components, wherein the input end of the power management component is connected to the output end of the first power supply; the input end of the first PDU is connected to the output end of the power management component, the first to fourth output ends of the first PDU are respectively connected to the input ends of the first to fourth battery simulation components, the fifth output end of the first PDU is connected to the input end of the second PDU, and the first PDU adjusts the voltage and temperature of the first to fourth battery simulation components according to the current simulation requirements; the first to fourth output ends of the second PDU are respectively connected to the input ends of the fifth to eighth battery simulation components, and the second PDU adjusts the voltage and temperature of the fifth to eighth battery simulation components according to the current simulation requirements. This solves the problem that when using real battery packs for functional testing, various testing requirements cannot be met, and there is a risk of fire and explosion during the testing process. The authenticity of the battery simulation system is achieved, a comprehensive testing platform is provided for the power battery system, and the power battery SOC is reduced.

[0040] Specifically, Figure 1 A schematic diagram of a power battery simulation system provided in an embodiment of the utility model.

[0041] like Figure 1 As shown, the power battery simulation system 10 includes: a power management component 100, a first PDU 200, a second PDU 300 and a first battery simulation component 1 to an eighth battery simulation component 8.

[0042] Among them, the input end of the power management component 100 is connected to the output end of the first power supply 400; the input end of the first PDU 200 is connected to the output end of the power management component 100, the first to fourth output ends of the first PDU 200 are respectively connected to the input ends of the first battery simulation component 1 to the fourth battery simulation component 4, the fifth output end of the first PDU 200 is connected to the input end of the second PDU 300, and the first PDU 200 adjusts the voltage and temperature of the first battery simulation component 1 to the fourth battery simulation component 4 according to the current simulation requirements; the first to fourth output ends of the second PDU 300 are respectively connected to the input ends of the fifth battery simulation component 5 to the eighth battery simulation component 8, and the second PDU 300 adjusts the voltage and temperature of the fifth battery simulation component 5 to the eighth battery simulation component 8 according to the current simulation requirements.

[0043] Specifically, the power management component 100 provided in the power battery simulation system 10 of the embodiment of the present application is a power manager, which is used to control the power supply and trigger, so that the power battery simulation system 10 of the embodiment of the present utility model is easy to maintain and convenient to use. The first PDU 200 and the second PDU 300 of the embodiment of the present utility model distribute power to multiple battery simulation components for use. In addition, it has the functions of overload protection and overvoltage protection, which can ensure the safety of the power supply and the power battery simulation system 10.

[0044] The first battery simulation component 1 to the eighth battery simulation component 8 of the embodiment of the utility model are battery simulators, which are devices used to simulate the charging and discharging of real batteries. Each battery simulator contains a board. By installing boards with different functions, the battery simulator can realize the sampling, control, and monitoring functions in the power battery simulation system. Therefore, the battery simulator can simulate the working characteristics of the power battery. The embodiment of the utility model can use the first battery simulation component 1 to the eighth battery simulation component 8 to change the battery voltage, SOC and other data to verify the response of the power battery under different conditions. In addition, the battery simulator has a remote communication interface such as CAN (Controller Area Network) and Ethernet, which can be connected to the host computer to form a power battery monitoring system to realize real-time monitoring of the operating status of the entire power battery simulation system.

[0045] Optionally, the simulation requirements of the embodiment of the utility model refer to that the technicians in this field set the output values ​​of the single cell voltage and single cell temperature according to the current test needs, adjust the voltage and temperature of the first battery simulation component 1 to the eighth battery simulation component 8, and can create a fault scenario by changing a single cell voltage or a single cell temperature during the output process. Therefore, the power battery simulation system of the embodiment of the utility model can perform high temperature battery testing and low temperature charging testing in a normal temperature test environment, realize battery overvoltage and undervoltage testing, and effectively avoid the safety risks caused by using real battery pack testing. The power battery simulation system of the embodiment of the utility model realizes the authenticity of the power battery simulation system to the greatest extent by simulating single cells, that is, by simulating the minimum system.

[0046] Preferably, the battery simulator of the embodiment of the utility model can set the single cell voltage output range to 0-6V, and the single cell temperature range to 0-10V (the embodiment of the utility model adopts voltage output instead of temperature sampling resistor output).

[0047] It should be noted that the power battery simulation system of the embodiment of the utility model has a total of 200 battery cells and 48 temperature outputs, and can support the expansion of the number of channels. The single cell voltage and single cell temperature of the battery simulator of the embodiment of the utility model can support one-key setting of all outputs, and can also set an output separately to meet various simulation needs, which greatly enhances the flexibility of the power battery simulation system of the embodiment of the utility model.

[0048] Therefore, the power battery simulation system of the embodiment of the utility model utilizes multiple battery simulators to replace the real battery pack for labcar debugging and functional testing, thereby realizing the authenticity of the battery simulation system, and being safe, reliable and highly operable, providing a comprehensive testing platform for the power battery system.

[0049] Further, Figure 2 This is a schematic diagram of the layout of a power battery simulation system according to a specific embodiment of the utility model. Figure 3 This is a schematic diagram of signal connection of a power battery simulation system according to a specific embodiment of the utility model. Figure 2 and Figure 3 As shown, the power battery simulation system of the embodiment of the utility model adopts a discrete layout method, which greatly improves the integrity, functional continuity and durability of the entire system.

[0050] The following examples are combined Figure 2 and Figure 3 The structure and principle of the power battery simulation system of the embodiment of the utility model are specifically introduced.

[0051] Optionally, in some embodiments, the power battery simulation system further includes: a second power supply, wherein an input end of the second power supply is connected to an output end of the high voltage power supply, and an output end of the second power supply is connected to an input end of the power management component.

[0052] Optionally, in some embodiments, the second power supply is a feedback high voltage power supply.

[0053] It is understandable that the feedback high-voltage power supply can feed back the output of the switching power supply to the power grid, while reducing losses and improving system efficiency. Therefore, the embodiment of the utility model uses the first power supply and the second power supply to form a bidirectional DC source as a high-voltage power supply part. Through the feedback high-voltage power supply, high-voltage DC can be output to the test bench, and the high-voltage DC power when the test bench is charged can be fed back to the power grid.

[0054] Specifically, Figure 3As shown, since the feedback high-voltage power supply requires external equipment to convert AC power into DC power and then discharge the power battery simulation system, the embodiment of the utility model connects the input end of the feedback high-voltage power supply to the output end of the high-voltage power supply, and the high-voltage power supply is powered by 380V.

[0055] In addition, for safety reasons, the embodiment of the utility model sets an enable command for the feedback high-voltage power supply. Those skilled in the art set the output voltage value and current limit in the host computer software and click the enable button before the high voltage can be output.

[0056] Optionally, in some embodiments, the input end of the first power supply is connected to the mains output end or the output end of the second power supply.

[0057] In some cases, such as Figure 2 As shown, the power supply source of the first power supply of the embodiment of the utility model can be the mains or a feedback high-voltage power supply. In the related art, when a real battery pack is used, after charging is completed, the vehicle needs to be discharged by turning on the air conditioner of the vehicle to reduce the power battery SOC. This part of the electricity is equivalent to being wasted. The utility model uses a bidirectional DC source as the high-voltage power supply part, which can directly feed the power of the charging test process back to the power grid. When charging again, the single cell voltage can be directly modified by the host computer to reduce the power battery SOC.

[0058] Optionally, in some embodiments, the power battery simulation system further includes: a heat dissipation component connected to the sixth output terminal of the first PDU.

[0059] Specifically, if Figure 2 As shown, the heat dissipation component of the embodiment of the utility model can be a fan, which is connected to PDU-A, that is, the sixth output terminal of the first PDU of the embodiment of the utility model, and is used to transfer the heat generated in the power battery simulation system to the outside to ensure the normal operation of the system.

[0060] Optionally, in some embodiments, the power battery simulation system also includes: a first chassis, the input end of the first chassis is connected to the fifth output end of the second PDU; a second chassis, the input end of the second chassis is connected to the sixth output end of the second PDU; the first board card output interface of the first chassis is connected to the first board card output interface of the second chassis, and the second board card output interface of the first chassis is connected to the second board card output interface of the second chassis.

[0061] The first chassis of the embodiment of the utility model is a PXI chassis, which is used for power battery simulation test, measurement and data acquisition. The second chassis of the embodiment of the utility model is an EDAQ chassis, which can monitor the operating status of the power battery simulation system in real time and realize remote monitoring and management through data acquisition and communication technology.

[0062] It should be noted that the PXI chassis and EDAQ chassis of the embodiment of the utility model can adapt to different testing requirements, so as to facilitate those skilled in the art to configure according to actual needs.

[0063] Specifically, if Figure 2 As shown in FIG. 1 , the PXI chassis and the EDAQ chassis are connected to different interfaces of the PDU-B, such as Figure 3 As shown, the first board output interface of the PXI chassis is connected to the first board output interface of the EDAQ chassis, and the second board output interface of the PXI chassis is connected to the second board output interface of the EDAQ chassis.

[0064] Optionally, in some embodiments, the power battery simulation system further includes: first to sixth connectors, the first connection end and the second connection end of the first connector are respectively connected to the output end of the first battery simulation component and the output end of the second battery simulation component, the first connection end and the second connection end of the second connector are respectively connected to the output end of the third battery simulation component and the output end of the fourth battery simulation component, the first connection end and the second connection end of the third connector are respectively connected to the output end of the fifth battery simulation component and the output end of the sixth battery simulation component; the first connection end and the second connection end of the fourth connector are respectively connected to the output end of the seventh battery simulation component and the output end of the eighth battery simulation component, the first connection end of the fifth connector is connected to the first board output interface of the first chassis and the second board output interface of the first chassis, and the first connection end and the second connection end of the sixth connector are both connected to the third board output interface of the second chassis.

[0065] It can be understood that the connector connects two or more active devices to transmit current or signals between them. Each connector in the embodiment of the utility model has a connector label, such as Figure 4 As shown, Figure 4 The utility model embodiment uses multiple connectors to connect the battery simulator and each channel, such as Figure 5 As shown, the battery simulator is connected to the connector via a cable.

[0066] Specifically, Figure 3 The channel connection sequence of the signal connection of the power battery simulation system of the embodiment of the utility model is shown as follows Figure 3As shown, the first connector of the embodiment of the utility model, i.e., the first connection end and the second connection end of the connector B1 are respectively connected to the output end of the battery simulator 1 and the output end of the battery simulator 2, the second connector of the embodiment of the utility model, i.e., the first connection end and the second connection end of the connector B2 are respectively connected to the output end of the battery simulator 3 and the output end of the battery simulator 4, the third connector of the embodiment of the utility model, i.e., the first connection end and the second connection end of the connector B3 are respectively connected to the output end of the battery simulator 5 and the output end of the battery simulator 6, the fourth connector of the embodiment of the utility model, i.e., the first connection end and the second connection end of the connector B4 are respectively connected to the output end of the battery simulator 7 and the output end of the battery simulator 8.

[0067] The first connection end of the fifth connector of the embodiment of the utility model, that is, the connector C1, is connected to the first board output interface of the PXI chassis and the second board output interface of the PXI chassis. The first connection end and the second connection end of the sixth connector of the embodiment of the utility model are connected to the third board output interface of the EDAQ chassis.

[0068] Based on the above embodiments, it can be understood that the power battery simulation system of the embodiment of the utility model has a total of 200 battery channels and 48 temperature outputs. Figure 3 As shown, connector B1 connects battery channels 1-48, connector B2 connects battery channels 49-96, connector B3 connects battery channels 97-144, connector B4 connects battery channels 145-192, and connector S1 connects temperature control channel 48 and battery channels 193-200.

[0069] Therefore, the embodiment of the utility model connects the channels of the above-mentioned device signals to a preset industrial computer through multiple connectors.

[0070] Optionally, in some embodiments, the power battery simulation system further includes: a switch, which is respectively connected to the output ends of the first to eighth battery simulation components, the output end of the second chassis, the output end of the second power supply, the sixth connector and the seventh output end of the second PDU.

[0071] Specifically, Figure 6 This is a schematic diagram of a switch connection of a specific embodiment of the utility model, such as Figure 6 and Figure 2 As shown, the switch of the embodiment of the utility model is respectively connected to the output ends of battery simulators 1 to 8, the output end of the EDAQ chassis (second chassis), the output end of the feedback high-voltage power supply (second power supply), connector C1 (sixth connector) and the seventh output end of PDU-B (second PDU).

[0072] Therefore, the switch of the embodiment of the utility model is connected with each battery simulator, realizing the liberalization of battery functions.

[0073] Optionally, in some embodiments, the power battery simulation system further includes: a cabinet, the cabinet is used to fix the power management component, the first PDU, the second PDU and the first to eighth battery simulation components.

[0074] Specifically, Figure 7 It is a schematic diagram of the front view, rear view, and rear view (open) of a power battery simulation system of a specific embodiment of the utility model, Figure 7 (a) is a front view of a power battery simulation system according to an embodiment of the utility model, Figure 7 (b) is a rear view of the power battery simulation system of the embodiment of the utility model, Figure 7 (c) is a rear view of the power battery simulation system of the embodiment of the utility model. Figure 7 As shown, the cabinet of the embodiment of the utility model is used to fix the power manager (power management component), PDU-A (first PDU), PDU-B (second PDU) and the first to eighth battery simulation components (battery simulator 1-battery simulator 8).

[0075] It should be noted that when designing the electrical control cabinet, the utility model plans different equipment in different areas, and each area has different requirements for noise emission and anti-interference. Therefore, the utility model uses a metal shell or a grounded isolation plate to isolate the space area in the cabinet. In addition, considering the calorific value, the air duct design of the electrical control cabinet in the embodiment of the utility model is reasonable, the exhaust is unobstructed, and the vortex is avoided in the cabinet, and dust is prevented from accumulating in a fixed position.

[0076] In addition, if Figure 2 As shown in (c), the embodiment of the utility model divides PDU-A (first PDU 200) and PDU-B (second PDU 300) into two layers, which can ensure both their hierarchy and functionality.

[0077] Furthermore, according to the protection level of the equipment in the cabinet, the dust and moisture-proof functions of the cabinet are taken into consideration. The common equipment set in the cabinet in the embodiment of the utility model also includes: air conditioner, fan, heat exchanger and anti-condensation heater. At the same time, the embodiment of the utility model appropriately selects equipment of different powers according to the size of the cabinet. For example, the selection of the fan mainly considers the normal working temperature in the cabinet and the higher ambient temperature outside the cabinet to obtain the temperature difference, the ventilation volume of the fan and the air volume in the cabinet.

[0078] Optionally, in some embodiments, the power battery simulation system further includes: a communication component, the communication component is connected to the first to sixth connectors, and the first to sixth connectors use the communication component to send the single cell voltage values ​​of the first to eighth battery simulation components to a preset host computer.

[0079] Specifically, the power battery simulation system of the embodiment of the utility model also includes a communication component for sending the single cell voltage value or test result of the battery simulator to a preset host computer, so as to facilitate technicians in this field to monitor the power battery simulation system in real time.

[0080] Therefore, the utility model can simulate the voltage and temperature of the power battery cell through the output of the board in the cabinet, and the bidirectional high-voltage power supply can simulate the high-voltage power supply. It can also be connected with the original vehicle's battery management system sub-board, main board, and high-voltage distribution unit through the low-voltage wiring harness in the battery pack to form a complete vehicle power battery. The authenticity of the battery simulation system is achieved, providing a comprehensive test platform for the power battery system and reducing the power battery SOC.

[0081] In order to enable those skilled in the art to further understand the power battery simulation system of the embodiment of the utility model, the following examples are listed to schematically illustrate the working process of the system.

[0082] like Figure 2-Figure 7 As shown, the embodiment of the utility model is designed from aspects such as cabinet layout, power supply design, communication design, cabinet surface interface description, cabinet baffle interface connection, cable connection and battery channel modification, so that the power battery simulation system of the embodiment of the utility model has high practicality.

[0083] Specifically, Figure 7 Shows a general layout of the cabinet. Figure 7 (a) is the front view of the cabinet, with a deep sense of hierarchy from top to bottom. From top to bottom, they are the power manager, eight battery simulators, EDAQ chassis, PXI chassis, and regenerative high-voltage power supply. Figure 7 (c) is the rear view of the cabinet (open), from which you can see two PDUs, PDU-A and PDU-B, which are divided into two layers to ensure both hierarchy and functionality. Figure 2 The layout of the power battery simulation system of the embodiment of the utility model is shown as follows: Figure 2 As shown, starting from the AC power, it is controlled by the chassis and PDU and distributed to each battery simulator and fan, EDAQ chassis, PXI chassis, and switch. The utility model adopts a discrete layout to ensure its integrity while greatly improving the durability of the system.

[0084] Further, Figure 3The device signal connection of the power battery simulation system of the embodiment of the utility model is shown. The embodiment of the utility model uses multiple connectors to connect the battery simulator and each channel to ensure signal connectivity. In addition, the embodiment of the utility model uses cables to connect devices. For example, the EDAQ chassis is connected to the connector via a SCSI68 cable.

[0085] Based on the above description, the working process of the power battery simulation system of the embodiment of the utility model is as follows:

[0086] (1) The system is powered on. The power manager, battery simulator, EDAQ chassis, and PXI chassis are all powered by 220V, and the regenerative high-voltage power supply is powered by 380V. Each part is powered independently, and the power switch and protection are set separately.

[0087] (2) After the system is powered on, each component is initialized. After successful initialization, it enters the standby state;

[0088] (3) Connect the host computer to the cabinet via a WLAN (Wireless Local Area Network) cable, open the host computer software, and deploy the host computer project;

[0089] (4) After the host computer project is successfully deployed, the output values ​​of the single cell voltage and single cell temperature can be set. The single cell voltage output range is 0-6V, and the single cell temperature output range is 0-10V (voltage output is used instead of temperature sampling resistor output). Both single cell voltage and single cell temperature can support one-click setting of all outputs, or one output can be set separately.

[0090] (5) For safety reasons, the regenerative high-voltage power supply needs to be designed with an enable command. The output voltage value and current limit value need to be set in the host computer software, and the high voltage can be output only after the enable button is clicked;

[0091] (6) During the output process, a fault scenario can be created by changing the voltage or temperature of a single cell;

[0092] (7) After use, stop enabling and output directly from the host computer, and then power off the device.

[0093] It should be noted that the power battery simulation system of the embodiment of the utility model is equipped with a 12V switching power supply. After the device is powered on, it can automatically output 12V electricity to power other low-voltage controllers.

[0094] Therefore, the embodiment of the utility model simulates the output of single cell voltage and temperature through the board card to replace the real single cell, and directly controls the output through the host computer. By simulating the minimum system, the authenticity of the battery simulation system is realized to the greatest extent. The high-voltage power supply system adopts a bidirectional DC source, which can output high-voltage DC power to the test bench and feed back the high-voltage DC power of the test bench when charging to the power grid, effectively reducing the SOC.

[0095] According to the power battery simulation system proposed in the embodiment of the utility model, the input end of the power management component is connected to the output end of the first power supply, the input end of the first PDU is connected to the output end of the power management component, the first to fourth output ends of the first PDU are respectively connected to the input ends of the first to fourth battery simulation components, the fifth output end of the first PDU is connected to the input end of the second PDU, the first PDU adjusts the voltage and temperature of the first to fourth battery simulation components according to the current simulation requirements, the first to fourth output ends of the second PDU are respectively connected to the input ends of the fifth to eighth battery simulation components, and the second PDU adjusts the voltage and temperature of the fifth to eighth battery simulation components according to the current simulation requirements. Thus, the problem in the related art that the power battery function test cannot perform high-temperature and low-temperature battery charging tests in a normal temperature laboratory environment, and the battery overvoltage and undervoltage function tests cannot be realized, and the battery pack during the test is usually in a non-mass production state, some safety performance does not meet the standards, and there is a risk of fire and explosion. The authenticity of the battery simulation system is realized, a comprehensive test platform is provided for the power battery system, and the power battery SOC is reduced.

[0096] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the above terms are not necessarily directed to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or N embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0097] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "N" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0098] Any process or method description in a flowchart or otherwise described herein may be understood to represent a module, fragment or portion of code including one or N executable instructions for implementing the steps of a custom logical function or process, and the scope of the preferred embodiments of the present invention includes alternative implementations in which functions may not be performed in the order shown or discussed, including performing functions in a substantially simultaneous manner or in the reverse order depending on the functions involved, which should be understood by technicians in the technical field to which the embodiments of the present invention belong.

[0099] It should be understood that the various parts of the utility model can be implemented by hardware, software, firmware or a combination thereof. In the above embodiment, the N steps or methods can be implemented by software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented by hardware, as in another embodiment, it can be implemented by any one or a combination of multiple of the following technologies known in the art: a discrete logic circuit having a logic gate circuit for implementing a logic function for a data signal, a dedicated integrated circuit having a suitable combination of logic gate circuits, a programmable gate array, a field programmable gate array, etc.

[0100] A person skilled in the art may understand that all or part of the steps in the method for implementing the above-mentioned embodiment may be completed by instructing related hardware through a program, and the program may be stored in a computer-readable storage medium, which, when executed, includes one or a combination of the steps of the method embodiment.

[0101] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations of the present invention. Ordinary technicians in the field can change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A power battery simulation system, characterized in that: include: A power management component, a first power distribution unit PDU, a second power distribution unit PDU and first to eighth battery simulation components, wherein: The input end of the power management component is connected to the output end of the first power supply; The input end of the first PDU is connected to the output end of the power management component, the first to fourth output ends of the first PDU are respectively connected to the input ends of the first to fourth battery simulation components, the fifth output end of the first PDU is connected to the input end of the second PDU, and the first PDU adjusts the voltage and temperature of the first to fourth battery simulation components according to the current simulation requirements; The first to fourth output ends of the second PDU are respectively connected to the input ends of the fifth to eighth battery simulation components, and the second PDU adjusts the voltage and temperature of the fifth to eighth battery simulation components according to current simulation requirements.

2. The power battery simulation system according to claim 1, characterized in that: Also includes: a first chassis, an input end of the first chassis being connected to a fifth output end of the second PDU; a second chassis, an input end of the second chassis being connected to a sixth output end of the second PDU; The first board output interface of the first chassis is connected to the first board output interface of the second chassis, and the second board output interface of the first chassis is connected to the second board output interface of the second chassis.

3. The power battery simulation system according to claim 2, characterized in that: Also includes: A second power supply, wherein an input end of the second power supply is connected to an output end of the high voltage power supply, and an output end of the second power supply is connected to an input end of the power management component.

4. The power battery simulation system according to claim 3, characterized in that: The input end of the first power supply is connected to the mains output end or the output end of the second power supply.

5. The power battery simulation system according to claim 3, characterized in that: The second power supply is a feedback high voltage power supply.

6. The power battery simulation system according to claim 2, characterized in that: Also includes: First to sixth connectors, the first connection end and the second connection end of the first connector are respectively connected to the output end of the first battery simulation component and the output end of the second battery simulation component, the first connection end and the second connection end of the second connector are respectively connected to the output end of the third battery simulation component and the output end of the fourth battery simulation component, and the first connection end and the second connection end of the third connector are respectively connected to the output end of the fifth battery simulation component and the output end of the sixth battery simulation component; The first connection end and the second connection end of the fourth connector are respectively connected to the output end of the seventh battery simulation component and the output end of the eighth battery simulation component, the first connection end of the fifth connector is connected to the first board output interface of the first chassis and the second board output interface of the first chassis, and the first connection end and the second connection end of the sixth connector are connected to the third board output interface of the second chassis.

7. The power battery simulation system according to claim 1, characterized in that: Also includes: A switch, wherein the switch is respectively connected to the output ends of the first to eighth battery simulation components, the output end of the second chassis, the output end of the second power supply, the sixth connector, and the seventh output end of the second PDU.

8. The power battery simulation system according to claim 1, characterized in that: Also includes: A heat dissipation component is connected to the sixth output terminal of the first PDU.

9. The power battery simulation system according to claim 1, characterized in that: Also includes: A cabinet is used for fixedly installing the power management component, the first PDU, the second PDU and the first to eighth battery simulation components.

10. The power battery simulation system according to claim 5, characterized in that: Also includes: A communication component, wherein the communication component is connected to the first to sixth connectors, and the first to sixth connectors use the communication component to send the single cell voltage values ​​of the first to eighth battery simulation components to a preset host computer.

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