CN-116252647-B - Charging control system and method for pure electric bus

CN116252647BCN 116252647 BCN116252647 BCN 116252647BCN-116252647-B

Abstract

The invention discloses a charging control system and a charging method for a pure electric bus, comprising a high-voltage electrical appliance box, a low-voltage battery and a charging switch, wherein the high-voltage battery is arranged in the high-voltage electrical appliance box and is connected with a DCDC module, the DCDC module is connected with a charging power supply, the high-voltage battery is also connected with a battery management system, the battery management system is connected with the low-voltage battery, the charging switch is arranged on a connecting circuit of the low-voltage battery and the battery management system, when the charging switch is closed, the low-voltage battery provides activation power for the battery management system to activate the battery management system, the battery management system can also be connected with an auxiliary power supply of a national standard charging gun, the auxiliary power supply of the national standard charging gun provides activation power for the battery management system to activate the battery management system, and after the battery management system is activated and the high-voltage battery is judged to be normally charged, the DCDC module provides the charging power supply with the charging power supply. And the charging and power distribution control of the national standard charging gun and the non-national standard charging gun are integrated.

Inventors

LIU JINGKAI
HAN JINGLU
SUN MINGSHUAI
LIU PEIPEI
WEI CHUNDE
SUN YUPING
PEI CHONGLI

Assignees

中通客车股份有限公司

Dates

Publication Date: 20260505
Application Date: 20221219

Claims (7)

1. The charging control system of the pure electric bus is characterized by comprising a high-voltage electric appliance box, a low-voltage battery and a charging switch, wherein the high-voltage battery is arranged in the high-voltage electric appliance box and is connected with a DCDC module, the DCDC module is connected with a charging power supply, the high-voltage battery is also connected with a battery management system, the battery management system is connected with the low-voltage battery, the charging switch is arranged on a connecting circuit of the low-voltage battery and the battery management system, and when the charging switch is closed, the low-voltage battery provides activation electricity for the battery management system to activate the battery management system; the battery management system can also be connected with an auxiliary power supply of the national standard charging gun, the auxiliary power supply of the national standard charging gun provides activation power for the battery management system, the battery management system is activated, and after the battery management system is activated and the normal charging of the high-voltage battery is judged, the DCDC module provides low voltage power for the charging power supply; The DCDC module is also connected with other electric components in the high-voltage electrical appliance box respectively, after the battery management system is activated and judges that the high-voltage electrical appliance box is normally charged, the DCDC module supplies power to the other electric components in the high-voltage electrical appliance box, specifically, the battery management system is compatible with 12V and 24V wide voltage wake-up functions, after the battery management system receives the activated power, the battery management system is activated, the BMS sends charge state message information to the whole vehicle CAN network, the charge state message information comprises charge voltage, current and temperature, and judges whether the high-voltage electrical appliance box is normally charged through the BMS, and when the high-voltage electrical appliance box is judged that the high-voltage electrical appliance box is normally charged, the DCDC module outputs 24V voltage to the other electric components in the high-voltage electrical appliance box; when the charging gun charges the high-voltage battery, if the charging voltage, the charging current and the temperature all meet the set requirements, judging that the high-voltage battery is normally charged; The high-voltage battery is connected with the national standard charging interface and the non-national standard charging interface respectively, the national standard charging interface is used for being connected with the national standard charging gun, the high-voltage battery is charged through the national standard charging gun, the non-national standard charging interface is used for being connected with the non-national standard charging gun, and the high-voltage battery is charged through the non-national standard charging gun; When the national standard charging gun is used for charging the high-voltage battery, the charging switch is disconnected, and an auxiliary power supply of the national standard charging gun is used for providing activation power for the battery management system; when the non-national standard charging gun is used for charging the high-voltage battery, the charging switch is closed, and the low-voltage battery is used for providing activation electricity for the battery management system.
2. The electric bus charging control system as set forth in claim 1, wherein the charging power supply is connected to the integrated power supply operating circuit, the vehicle controller wake-up circuit, the meter charge wake-up circuit and the remote terminal charge wake-up circuit, respectively, the integrated power supply operating circuit is electrically connected to the integrated power supply, the vehicle controller wake-up circuit is electrically connected to the vehicle controller wake-up circuit, the meter charge wake-up circuit is electrically connected to the meter charge wake-up circuit, and the remote terminal charge wake-up circuit is electrically connected to the remote terminal charge wake-up circuit.
3. The electric bus charging control system as set forth in claim 2, wherein the output of the integrated power supply is connected to the power input of the high voltage battery fluid cooling unit.
4. A pure electric bus charging control system as claimed in claim 2, characterized in that the output of the integrated power supply is also connected to the battery and that a switch is arranged in the connection circuit of the integrated power supply to the battery.
5. A pure electric bus charging control system as in claim 2 wherein the whole bus controller wake-up power is also connected to the ignition power source.
6. A pure electric bus charging control system as in claim 5 wherein the ignition power source is further connected to a remote terminal ignition wake-up and an instrument ignition wake-up, respectively.
7. The electric bus charging control system as set forth in claim 1, wherein the charging power supply is connected to a first operating circuit and a second operating circuit, respectively, the first operating circuit is electrically connected to the meter, and the second operating circuit is electrically connected to the remote terminal operating circuit and the vehicle controller.

Description

Charging control system and method for pure electric bus Technical Field The invention relates to the technical field of new energy pure electric bus charging, in particular to a pure electric bus charging control system and method. Background The statements in this section merely provide background information related to the present disclosure and may not necessarily constitute prior art. At present, along with the gradual maturity of pure electric motor coach technology, the pure electric motor coach in domestic market has realized mass popularization and application to there are a large number of electric motor vehicles export overseas, because the charging standard in other country and regions is different from national standard, the charging of the charging standard in other country and region can not be realized by adopting the control method of national standard charging, and in order to realize the charging of the remaining charging standard, a new charging control method needs to be set, so that the charging control state is diversified, and the charging operation is unfavorable. Disclosure of Invention In order to solve the problems, the invention provides a charging control system and a charging control method for a pure electric bus, which can give consideration to the charging states of national standard and non-national standard charging guns, can realize effective wake-up work of related components in the charging process, and can realize effective safety control meeting the charging process. In order to achieve the above purpose, the invention adopts the following technical scheme: According to the charging control system of the pure electric bus, the charging control system comprises a high-voltage electrical appliance box, a low-voltage battery and a charging switch, wherein the high-voltage battery is arranged in the high-voltage electrical appliance box and connected with a DCDC module, the DCDC module is connected with a charging power supply, the high-voltage battery is further connected with a battery management system, the battery management system is connected with the low-voltage battery, the charging switch is arranged on a connecting circuit of the low-voltage battery and the battery management system, when the charging switch is closed, the low-voltage battery provides activation power for the battery management system to activate the battery management system, the battery management system can also be connected with an auxiliary power supply of a national standard charging gun, the auxiliary power supply of the national standard charging gun provides activation power for the battery management system to activate the battery management system, and after the battery management system is activated and normal charging of the high-voltage battery is judged, the DCDC module provides the charging power supply with the charging power supply. In a second aspect, a charging control method of a charging control system of a pure electric bus according to the first aspect is provided, including: When the national standard charging gun is used for charging the high-voltage battery, the charging switch is disconnected, and an auxiliary power supply of the national standard charging gun is used for providing activation power for the battery management system; when the non-national standard charging gun is used for charging the high-voltage battery, the charging switch is closed, and the low-voltage battery is used for providing activation electricity for the battery management system; When the battery management system is activated and the high-voltage battery is judged to be normally charged, the DCDC module provides low-voltage power for the charging power supply. Compared with the prior art, the invention has the beneficial effects that: 1. the invention realizes the charging of the pure electric bus through the national standard charging gun or the non-national standard charging gun, integrates the charging and power distribution control of the national standard charging gun and the European standard charging gun, forms a unified technical route and realizes the compatibility and the adaptability of the low-voltage power distribution control system in the charging process. 2. The invention prescribes the working state of each electric appliance component in the charging process of the high-voltage battery, effectively utilizes the working performance and the characteristics of each electric appliance component, realizes the effective preservation of the charging state information and is beneficial to the maintenance of the safety state of the vehicle. 3. The invention defines the low-voltage distribution control logic in the charging process, provides a standardized charging process control technical route, and realizes centralized, accurate and effective control of electric appliance components. Additional aspects of the invention will be set forth in part in the description which follows