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Charging protection system and method for electric passenger car

A charging protection, electric bus technology, applied in the direction of electric vehicle charging technology, electric vehicles, charging stations, etc., can solve the problems affecting the approval of new energy buses, hidden dangers of charging safety, endangering social security and personal safety, etc., to avoid The effect of high voltage and body short circuit

Active Publication Date: 2017-09-05
ZHONGTONG BUS HLDG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In recent years, new energy buses have developed rapidly, but there are many hidden dangers in their safety performance, especially charging safety
The phenomenon of high temperature, short circuit, or even charging without pulling out the charging gun occurs from time to time for new energy buses. Relevant media have also reported many accidents such as spontaneous combustion and explosion of buses during charging, which seriously endanger social safety and personal safety. , which seriously affects the public's recognition of new energy buses, affects the market promotion of new energy buses, and violates the country's sustainable development strategy

Method used

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  • Charging protection system and method for electric passenger car

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] A charging protection system for an electric bus, including a power battery, a battery management system, and a charging socket; the off-board charger charges the power battery under the control of the battery management system through the charging socket, and is installed next to the positive and negative terminals of the charging socket. With temperature and humidity sensor: The temperature and humidity sensor detects the temperature K and humidity around the positive and negative terminals And sent to the battery management system, the battery management system will be the temperature K and humidity with temperature setpoint K 1 , Humidity setpoint For comparison, if K>K1 or Then reduce the charging current to the power battery, if K>K 2 or Then stop charging the power battery. The beneficial effect is that the temperature and humidity of the charging environment can be detected. When the charging environment at this time is not suitable for high current cha...

Embodiment 2

[0035] As an optimization of the above-mentioned embodiment, a DC insulation monitor is set in this embodiment to monitor the ground impedance of the high-voltage system in real time (when R1 , charging should be prohibited; R is the impedance of the bus to ground, and R 1 is the set value), get the insulation state of the system, and send the insulation state of the system to the battery management system.

[0036]The insulation monitor has two sets of positive and negative high-voltage wiring ports, one set is connected to the charging socket end, and the other set is connected to the power battery end. The voltage is collected to determine whether the charging contactors KM1 and KM2 are stuck. If there is a contactor sticking fault, the insulation monitor will send the fault information to the BMS in time, and the BMS will issue a command to prohibit charging.

[0037] The insulation monitor sends the collected battery terminal voltage to the BMS in real time, and compares ...

Embodiment 3

[0039] The present invention can also be included in the vehicle controller, and a relay KA1 is provided between the vehicle controller and the throttle enabling terminal. When the electric vehicle is charging, the battery management system controls KA1 to disconnect the vehicle controller from the accelerator enabling terminal; in addition, a relay KA2 is set between the vehicle controller and the gear enabling terminal, and KA2 enables The vehicle controller and the gear enabling terminal are in a long-term connection state, and KA2 is connected to the battery management system. When the electric vehicle is charging, the battery management system controls KA2 to disconnect the vehicle controller from the gear enabling terminal. , the beneficial effect is that when the vehicle is charging, the battery management system controls to disconnect the accelerator signal KA1 and the pedal signal KA2, and when the driver forgets to pull out the charging gun, the vehicle cannot run.

...

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PUM

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Abstract

The invention relates to a charging protection system and method for an electric passenger car. The system comprises a power battery, a battery management system and a charging socket; an off-board charger charges the power batter through the charging socket under the control of the battery management system, and a temperature and humidity sensor is arranged beside a positive and negative electrode binding post of the charging socket; the temperature and humidity sensor detects the temperature K and the humidity psi around the positive and negative electrode binding post and sends the temperature K and the humidity psi to the battery management system, the battery management system compares the temperature K and the humidity psi with a set temperature value K1 and a set humidity value psi1, and if K is larger than K1 or psi is larger than psi1, the charging current to the power battery is reduced; if K is larger than K2 or psi is larger than psi2, charging of the power battery is stopped.

Description

technical field [0001] The invention belongs to the technical field of electrical control for new energy passenger cars, and in particular relates to a charging protection system and method for electric passenger cars. Background technique [0002] In recent years, new energy buses have developed rapidly, but there are many hidden dangers in their safety performance, especially charging safety. The phenomenon of high temperature, short circuit, or even charging without pulling out the charging gun occurs from time to time for new energy buses. Relevant media have also reported many accidents such as spontaneous combustion and explosion of buses during charging, which seriously endanger social safety and personal safety. , Seriously affect the public's recognition of new energy buses, affect the market promotion of new energy buses, and violate the country's sustainable development strategy. Contents of the invention [0003] In order to solve the above problems, the prese...

Claims

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Application Information

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IPC IPC(8): B60L3/00B60L11/18
CPCB60L3/00B60L53/00B60L53/60Y02T10/70Y02T10/7072Y02T90/12Y02T90/14Y02T90/16
Inventor 王钦普冯汝广王波刘涛范志先徐彪秦笃赫
Owner ZHONGTONG BUS HLDG
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