An electric vehicle combined battery detection system and battery testing machine

Abstract

The present invention discloses an electric vehicle assembled battery detection system, which is used to detect the electrical performance of an electric vehicle assembled battery. The electric vehicle battery distribution box is provided with a high-voltage switch box, a power transmission adapter and a communication adapter connected by signals, and comprises: a host computer module; a communication detection module, which is connected by signals to the host computer module and the communication adapter, and the communication detection module controls a national standard control cabinet and a European standard control cabinet; a charging circuit module, which is connected to the national standard control cabinet or the European standard control cabinet through a first switch and is connected to a charging gun port, and the charging gun port is connected to the high-voltage switch box; a charging and discharging circuit module, which is connected to a charging and discharging port, and the charging and discharging port is connected to the power transmission adapter; a charging and discharging module, which is connected to the host computer system by signals, and the charging and discharging module is connected to the charging circuit module or the charging and discharging circuit module through a second switch.

Description

Technical Field

[0001] The present invention relates to the detection of electric vehicle power batteries, and in particular to the detection of electrical safety performance of electric vehicle power batteries. Background Art

[0002] With the development of social economy and the improvement of people's living standards, cars are becoming more and more popular in thousands of households. As a result, the number of cars has increased year by year, which has led to more prominent problems of parking difficulties and environmental pollution. Therefore, in order to build a low-carbon and environmentally friendly economy and the development of new energy strategies and the increasing maturity of electric vehicle technology, major cities are currently increasing the promotion and application of electric vehicles. The fundamental development of electric vehicles lies in the revolution of battery technology, and the detection of battery electrical performance after installation is also an important part of ensuring the safe and stable operation of electric vehicle batteries. However, there is no electric vehicle testing equipment on the market that is designed for comprehensive electrical testing of electric vehicle battery PACKs. Without dismantling the electric vehicle, the DC charging port complies with the national standard GB / T 27930-2015 communication protocol, there is no BMS protection strategy for discharge. Many electric vehicles produced by car companies have restriction strategies for DC charging port discharge, resulting in the electric vehicle PACK detection equipment on the market only performing charging detection from the DC charging port of the whole vehicle in a static environment and reading and monitoring the relevant BMS information parameters during the charging detection process through the charging communication CAN. In this case, there are fewer detection items, and it is impossible to comprehensively test the electrical performance and safety performance of the electric vehicle battery PCAK as a whole and obtain complete vehicle charging and discharging BMS information.

[0003] Therefore, it is very meaningful to design an electric vehicle battery pack detection system that can comprehensively detect the electrical performance of electric vehicle battery packs and obtain complete BMS information of vehicle charging and discharging. Summary of the invention

[0004] In order to overcome the shortcomings of the prior art, the purpose of the present invention is to add a communication detection module to the electric vehicle battery combination detection system, and the communication detection module is connected to the communication interface in the electric vehicle battery distribution box to achieve the purpose of the electric vehicle battery combination detection system to obtain the charging and discharging BMS data information of the combination battery.

[0005] The present invention is implemented by the following technical scheme: an electric vehicle assembled battery detection system, used for detecting the electrical performance of an electric vehicle assembled battery, the electric vehicle battery distribution box is provided with a high-voltage switch box, a power transmission adapter and a communication adapter connected by signals, including: a host computer module; a communication detection module, the host computer module and the communication adapter are connected by signals, the communication detection module controls a national standard control cabinet and a European standard control cabinet; a charging circuit module, connected to the national standard control cabinet or the European standard control cabinet through a first switch, and connected to a charging gun port, the charging gun port is connected to the high-voltage switch box; a charging and discharging circuit module, connected to a charging and discharging port, the charging and discharging port is connected to the power transmission adapter; a charging and discharging module, the signal is connected to the host computer system, the charging and discharging module is connected to the charging circuit module or the charging and discharging circuit module through a second switch.

[0006] Furthermore, the charging and discharging module includes a three-phase input circuit breaker, a three-phase isolation transformer, a bidirectional inverter and a bidirectional DC converter which are connected in sequence, and the bidirectional DC converter is connected to the second switch.

[0007] Furthermore, the three-phase input circuit breaker and the three-phase isolation transformer are provided with a smart meter to monitor the power consumption of the charging and discharging module in real time.

[0008] Furthermore, the communication protocol between the communication detection module and the communication adapter adopts CAN or 485 or LAN communication.

[0009] Furthermore, the electric vehicle battery distribution box includes a battery assembly, the high-voltage switch box, the communication adapter, the power battery transmission adapter, a motor inverter, and a motor. The two ends of the communication adapter and the power transmission adapter are respectively connected to the high-voltage switch box and the motor inverter.

[0010] Furthermore, the electric vehicle battery distribution box also includes a charge and discharge interface, which is connected to the charge and discharge port so that the power transmission adapter and the charge and discharge circuit are connected.

[0011] Furthermore, the electric vehicle battery distribution box also includes a charging gun socket port, and the charging gun socket port is connected to the charging gun port, so that the electric vehicle battery distribution box is connected to the charging circuit module.

[0012] Furthermore, the charging and discharging circuit module has interfaces for an electric vehicle insulation tester and a withstand voltage tester.

[0013] Furthermore, the communication detection module has an intelligent control unit, which intelligently monitors the charging standard of the electric vehicle, so that the first switch switches to connect to the national standard control cabinet or the European standard control cabinet according to the charging standard of the electric vehicle.

[0014] Another technical solution of the present invention is:

[0015] A battery tester, comprising: the battery tester has the electric vehicle combined battery detection system as described in any one of claims 1 to 9, as well as two charging guns, two inverters, and two DC converters.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] The communication detection module signal is connected to the communication adapter, so that the electric vehicle combined battery detection system obtains the charging and discharging BMS data information of the combined battery; the communication detection module controls the national standard control cabinet and the European standard control cabinet, and the national standard control cabinet and the European standard control cabinet are connected to the charging circuit module through the switchable first switch, so that the electric vehicle combined battery detection system can charge national standard or European standard electric vehicles, thereby increasing the scope of application of the electric vehicle combined battery detection system. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a front view of the battery testing machine of the present invention;

[0019] Figure 2 The figure is a flow chart of the electric vehicle assembled battery detection system of the present invention.

[0020] In the figure: 100, battery tester; 1, host; 2, charging gun; 3, isolation inverter; 4, inverter; 5, DC converter. DETAILED DESCRIPTION

[0021] The embodiments of the present invention are further described below in conjunction with the accompanying drawings and specific implementation methods.

[0022] like Figure 1 As shown, it is a schematic diagram of the battery testing machine 100 of the present invention, and the battery testing machine 100 includes a host 1, two charging guns 2 respectively located on both sides of the host, an isolation inverter 3 built in the host 1, and two inverters 4 and two DC converters 5 installed in the host 1. In this embodiment, the inverter power is 60KW, and the DC converter model is 750V100A-DCDC. In other embodiments, the power of the inverter and the model of the DC converter can be arbitrarily selected according to actual needs, which is not limited here.

[0023] As shown in the figure, the electric vehicle assembled battery detection system loaded in the host is used to detect the electrical performance of the electric vehicle assembled battery, including a host computer module; a communication detection module, the signal of which is connected to the host computer module, and the communication detection module controls a national standard control cabinet and a European standard control cabinet; a charging circuit module, which is connected to the national standard control cabinet or the European standard control cabinet through a first switch and connected to a charging gun port; a charging and discharging circuit module, which is connected to a charging and discharging port; a charging and discharging module, the signal of which is connected to the host computer system, and the charging and discharging module is connected to the charging circuit module or the charging and discharging circuit module through a second switch.

[0024] The electric vehicle battery distribution box includes a battery pack, a high-voltage switch box, a communication adapter, the power battery transmission adapter, a motor inverter, and a motor. The two ends of the communication adapter and the power transmission adapter are respectively connected to the high-voltage switch box and the motor inverter; the upper computer module and the communication adapter are connected through the communication detection module signal, so that the electric vehicle battery pack detection system obtains the charging and discharging BMS data information of the battery pack; the charging gun port is connected to the high-voltage switch box, so that the electric vehicle battery pack detection system can detect the charging of the electric vehicle battery; in addition, the national standard control cabinet and the European standard control cabinet are connected to the charging circuit module through the switchable first switch, so that the electric vehicle battery pack detection system can charge national standard or European standard electric vehicles, thereby increasing the scope of application of the electric vehicle battery pack detection system.

[0025] Specifically, the charging and discharging module includes a three-phase input circuit breaker, a three-phase isolation transformer, a bidirectional inverter and a bidirectional DC converter connected in sequence, and the bidirectional DC converter is connected to the second switch. The three-phase input circuit breaker and the three-phase isolation transformer are provided with a smart meter to monitor the power consumption of the charging and discharging module in real time, so that the electric vehicle combined battery detection system has a detection and billing function. In this embodiment, the communication protocol between the communication detection module and the communication adapter adopts CAN or 485 or LAN communication, so that the signal transmission is accurate and timely. In other embodiments, other communication protocols can also be used as long as the signal transmission is good. Preferably, the electric vehicle battery distribution box also includes a charging and discharging interface, which is connected to the charging and discharging port, so that the power transmission adapter and the charging and discharging circuit are connected, eliminating the charging gun cable line resistance loss and terminal contact impedance loss of the charging circuit, thereby realizing lossless charging and discharging detection of the new energy electric vehicle battery PCAK. The electric vehicle battery distribution box also includes a charging gun socket port, which is connected to the charging gun port, so that the electric vehicle battery distribution box is connected to the charging circuit module, which makes up for the fact that the CAN communication protocol of the BMS of the national standard charging interface battery PCAK has no discharge strategy as the protection strategy basis for the discharge detection project. The upper computer module of the electric vehicle battery combination detection system reads the charging and discharging information of the battery BMS through the communication interface and takes relevant protection measures. Further, the charging and discharging circuit module has an electric vehicle insulation tester and a withstand voltage tester interface, so that the electric vehicle battery combination detection system can perform insulation impedance and withstand voltage detection on the charging and discharging circuit; the communication detection module has an intelligent control unit (not shown, the same below), which intelligently monitors the charging standard of the electric vehicle, so that the first switch switches to connect the national standard control cabinet or the European standard control cabinet according to the charging standard of the electric vehicle, so that the electric vehicle battery combination detection system can intelligently switch between the national standard charging circuit detection, the European standard charging circuit detection, the national standard lossless charging and discharging circuit detection, and the European standard lossless charging and discharging circuit detection according to the communication mode of the whole vehicle PACK battery BMS.

[0026] The above-mentioned embodiments are only preferred embodiments of the present invention and cannot be used to limit the scope of protection of the present invention. Any non-substantial changes and substitutions made by technicians in this field on the basis of the present invention shall fall within the scope of protection required by the present invention.

Claims

1. An electric vehicle battery assembly detection system is used to detect the electrical performance of an electric vehicle battery assembly, and the electric vehicle battery distribution box is provided with a high-voltage switch box, a power transmission adapter and a communication adapter for signal connection, characterized in that: include: A host computer module; A communication detection module, the signal of which is connected to the host computer module and the communication adapter, and the communication detection module controls a national standard control cabinet and a European standard control cabinet; a charging circuit module, connected to the national standard control cabinet or the European standard control cabinet through a first switch, and connected to a charging gun port, and the charging gun port is connected to the high-voltage switch box; a charge-discharge circuit module connected to a charge-discharge port, and the charge-discharge port is connected to the power transmission adapter; A charge and discharge module is connected to the upper computer module by signal, and the charge and discharge module is connected to the charging circuit module or the charge and discharge circuit module through a second switch.

2. The electric vehicle battery assembly detection system according to claim 1, characterized in that: The charging and discharging module includes a three-phase input circuit breaker, a three-phase isolation transformer, a bidirectional inverter and a bidirectional DC converter which are connected in sequence, and the bidirectional DC converter is connected to the second switch.

3. The electric vehicle battery assembly detection system according to claim 2, characterized in that: The three-phase input circuit breaker and the three-phase isolation transformer are provided with a smart meter to monitor the power consumption of the charging and discharging module in real time.

4. The electric vehicle battery assembly detection system according to claim 1, characterized in that: The communication protocol between the communication detection module and the communication adapter adopts CAN or 485 or LAN communication.

5. The electric vehicle assembled battery detection system according to claim 1, characterized in that: The electric vehicle battery distribution box includes a combined battery, the high-voltage switch box, the communication adapter, the power transmission adapter, a motor inverter, and a motor. The two ends of the communication adapter and the power transmission adapter are respectively connected to the high-voltage switch box and the motor inverter.

6. The electric vehicle assembled battery detection system according to claim 5, characterized in that: The electric vehicle battery distribution box also includes a charge and discharge interface, which is connected to the charge and discharge port to connect the power transmission adapter and the charge and discharge circuit module.

7. The electric vehicle assembled battery detection system according to claim 1, characterized in that: The electric vehicle battery distribution box also includes a charging gun socket port, and the charging gun socket port is connected to the charging gun port, so that the electric vehicle battery distribution box is connected to the charging circuit module.

8. The electric vehicle battery assembly detection system according to claim 1, characterized in that: The charging and discharging circuit module has an interface for an electric vehicle insulation tester and a withstand voltage tester.

9. The electric vehicle assembled battery detection system according to claim 1, characterized in that: The communication detection module has an intelligent control unit, which intelligently monitors the charging standard of the electric vehicle, so that the first switch switches to connect to the national standard control cabinet or the European standard control cabinet according to the charging standard of the electric vehicle.

10. A battery testing machine, characterized in that: The invention comprises an electric vehicle assembled battery detection system as claimed in any one of claims 1 to 9, two charging guns, two inverters and two DC converters.

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