阅读说明：本技术 实现增程车辆双电源自动平衡融合的系统 (System for realizing dual-power automatic balance fusion of range-extended vehicle ) 是由 王建民 李良 郑核桩 唐月锋 徐敏捷 段林林 裴高利 于 2021-07-01 设计创作，主要内容包括：本发明涉及一种实现增程车辆双电源自动平衡融合的系统,包括电源、高压变换电路和BCU模块,所述的高压变换电路与BCU模块相连接,所述的电源与高压变换电路和BCU模块均相连接,所述的高压变换电路包括双端预充回路,所述的高压变换电路由对称的四个功率开关模块组成,通过控制开关模块开闭,采集电源电压与整车需求电压及电流进行功率开关模块控制,所述的双端预充回路根据采集电压及兼顾通过与整车通讯得到的电压参数。采用了本发明的实现增程车辆双电源自动平衡融合的系统,通过设计标准的并联电源管理系统,与整车总控系统或整车电源系统进行通信,获取电源并联参数,根据整车电源管理策略,根据并联电源的角色,进行并联后的输入/输出功能实现。(The invention relates to a system for realizing dual-power automatic balance fusion of a range-extended vehicle, which comprises a power supply, a high-voltage conversion circuit and a BCU (body control unit) module, wherein the high-voltage conversion circuit is connected with the BCU module, the power supply is connected with the high-voltage conversion circuit and the BCU module, the high-voltage conversion circuit comprises a double-end pre-charging loop, the high-voltage conversion circuit consists of four symmetrical power switch modules, the power switch modules are controlled to be switched on and switched off by controlling the switch modules, the power supply voltage and the required voltage and current of the whole vehicle are collected to carry out power switch module control, and the double-end pre-charging loop gives consideration to voltage parameters obtained by communication with the whole vehicle according to the collected voltage. The system for realizing the dual-power automatic balance fusion of the range-extended vehicle is adopted, the standard parallel power management system is designed to communicate with the whole vehicle main control system or the whole vehicle power system, the power parallel parameters are obtained, and the input/output function after parallel connection is realized according to the whole vehicle power management strategy and the role of the parallel power.)

1. The utility model provides a system for realize increasing journey vehicle dual supply automatic balance and fuse, a serial communication port, the system include power, high-pressure converting circuit and BCU module, high-pressure converting circuit be connected with the BCU module, power and high-pressure converting circuit and BCU module homogeneous phase be connected, high-pressure converting circuit include bi-polar preliminary filling return circuit, high-pressure converting circuit constitute by four power switch modules of symmetry, through control switch module switching, carry out power switch module control according to gathering mains voltage and whole car demand voltage and electric current, bi-polar preliminary filling return circuit be used for according to gathering voltage and compromise the voltage parameter who obtains through communicating with whole car, carry out the preliminary filling management.

2. The system for realizing dual power supply automatic balance fusion of the extended range vehicle as claimed in claim 1, wherein the double-end pre-charging circuit judges the pre-charging degree according to the pressure difference between the rear end and the front end of the pre-charging circuit in the initial power-on process, and controls the main circuit to be switched on after the pre-charging is completed.

3. The system for realizing dual-power automatic balance fusion of the range-extended vehicle according to claim 1, wherein the BCU module comprises:

the total voltage and current acquisition loop is connected with the pre-charging contactor and is used for voltage conversion and current control;

the control module is connected with the total voltage and current acquisition loop, acquires voltage and current signals as feedback signals according to the voltage and current requirements of the whole vehicle, and adjusts the output voltage and current by adopting a double closed-loop control method;

the CAN communication module is connected with the high-voltage conversion circuit, the double-end pre-charging circuit, the total voltage and current acquisition circuit and the control module, is communicated with other modules, and is used for carrying out time sequence control and self state uploading information according to the state of the whole vehicle;

and the BMS module monitors the battery state and determines the placement position of the module according to the power position.

4. The system for realizing dual-power automatic balance fusion of the range-extended vehicle as claimed in claim 3, wherein the BCU module further comprises an insulation monitoring module connected with the control module for controlling the switching of the insulation monitoring function during insulation monitoring.

Technical Field

The invention relates to the field of field mining area operation scenes, in particular to a system for realizing dual-power automatic balance fusion of a range-extended vehicle.

Background

For a new energy vehicle which is connected in series and then in parallel or provided with two or more groups of bus voltage power supplies, power supply matching work is usually required, and the functions are as follows: 1. the large parallel balance current impact caused by overlarge differential pressure is prevented, and irreversible impact is formed on relay contacts or other high-voltage circuit elements; 2. the negative effects on the requirements of the original power supply circuit, such as the reduction of the total current output capacity or the influence on the charging and discharging boundary and safety of other independent power supply systems, are prevented; 3. and identifying, judging and processing the state parameters of the parallel power supply, so that the parallel connection and integration of the high-voltage circuits of the power battery can be carried out under the conditions of meeting the voltage, capacity, temperature, type and the like.

Under the conditions of mine transportation, non-road operation and the like, special places and equipment are needed for matching power battery power supplies, the matching work is difficult to realize, multiple power supplies are coupled together in a traditional battery high-voltage power supply parallel circuit, independent processing cannot be carried out, circuit isolation is easy, but strict matching is required to be allowed after the parallel connection is carried out again, meanwhile, different types of battery power supplies or battery power supplies with larger deviation with the vehicle voltage level cannot be incorporated in the general situation, and the universal sharing of the battery power supplies is limited; differential input/output control cannot be performed, namely, a plurality of parallel power supplies can have different voltage, capacity, health state and the like, and after the parallel power supplies are connected to a whole vehicle circuit in parallel, independent input/output control cannot be performed according to respective conditions, and only can be passively followed by bus voltage.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provides a system for realizing the dual-power automatic balance fusion of the range-extended vehicle, which is simple and convenient to operate, good in flexibility and wide in application range.

In order to achieve the purpose, the system for realizing the dual-power automatic balance fusion of the range-extended vehicle comprises the following steps:

this system that realization increases journey vehicle dual supply automatic balance and fuses, its key feature is, the system include power, high-pressure converting circuit and BCU module, high-pressure converting circuit be connected with the BCU module, power and high-pressure converting circuit and BCU module homogeneous phase be connected, high-pressure converting circuit include bi-polar preliminary filling return circuit, high-pressure converting circuit constitute by four power switch modules of symmetry, through control switch module switching, carry out power switch module control according to gathering mains voltage and whole car demand voltage and electric current, bi-polar preliminary filling return circuit be used for according to gathering voltage and compromise the voltage parameter who obtains through communicating with whole car, carry out the preliminary filling management.

Preferably, the double-end pre-charging circuit judges the pre-charging degree according to the pressure difference between the rear end and the front end of the pre-charging circuit in the primary charging and electrifying process, and controls the main circuit to be switched on after the pre-charging is finished.

Preferably, the BCU module includes:

the total voltage and current acquisition loop is connected with the pre-charging contactor and is used for voltage conversion and current control;

the control module is connected with the total voltage and current acquisition loop, acquires voltage and current signals as feedback signals according to the voltage and current requirements of the whole vehicle, and adjusts the output voltage and current by adopting a double closed-loop control method;

the CAN communication module is connected with the high-voltage conversion circuit, the double-end pre-charging circuit, the total voltage and current acquisition circuit and the control module, is communicated with other modules, and is used for carrying out time sequence control and self state uploading information according to the state of the whole vehicle;

and the BMS module monitors the battery state and determines the placement position of the module according to the power position.

Preferably, the BCU module further includes an insulation monitoring module, connected to the control module, and configured to control switching of the insulation monitoring function during insulation monitoring.

By adopting the system for realizing the dual-power automatic balance fusion of the range-extended vehicle, the system can be independently arranged on the vehicle or a battery pack through designing a standard parallel power supply management system, is communicated with a whole vehicle main control system or a whole vehicle power supply system to obtain power supply parallel parameters, and realizes the input/output function after parallel connection according to the whole vehicle power supply management strategy and the role of a parallel power supply, thereby greatly expanding the flexibility of the energy management of the whole vehicle.

Drawings

Fig. 1 is a schematic circuit diagram of a system for implementing dual power supply automatic balance fusion of a range-extended vehicle according to the present invention.

Fig. 2 is a schematic diagram of a circuit system of the system for realizing dual power supply automatic balance fusion of the range-extended vehicle, which is connected to the whole vehicle.

Fig. 3 is a schematic diagram of a control mode of a high-voltage conversion circuit of the system for realizing the automatic dual-power balance fusion of the range-extended vehicle.

Reference numerals:

1, a power supply;

2, high-voltage conversion loop:

a, a switch power supply, a capacitor, an inductor and the like form a bidirectional DC/DC high-voltage conversion circuit;

b, a double-end pre-charging loop;

3, a BCU module:

a, collecting a total voltage and current loop;

b, an insulation monitoring module;

c a diagnostic function;

d, a CAN communication module;

an e BMS module;

Detailed Description

In order to more clearly describe the technical contents of the present invention, the following further description is given in conjunction with specific embodiments.

The system for realizing the dual-power automatic balance fusion of the extended range vehicle comprises a power supply, a high-voltage conversion circuit and a BCU (battery control unit) module, wherein the high-voltage conversion circuit is connected with the BCU module, the power supply is connected with the high-voltage conversion circuit and the BCU module, the high-voltage conversion circuit comprises a double-end pre-charging loop, the high-voltage conversion circuit consists of four symmetrical power switch modules, the power switch modules are controlled by controlling the switch modules to be switched on and switched off, the power switch modules are controlled according to the acquired power supply voltage and the required voltage and current of the whole vehicle, and the double-end pre-charging loop is used for pre-charging management according to the acquired voltage and voltage parameters obtained through communication with the whole vehicle.

As a preferred embodiment of the present invention, the double-ended pre-charge circuit determines the pre-charge degree according to the differential pressure between the rear end and the front end of the pre-charge circuit during the initial power-on process, and controls the main circuit to be switched on after the pre-charge is completed.

As a preferred embodiment of the present invention, the BCU module includes:

the total voltage and current acquisition loop is connected with the pre-charging contactor and is used for voltage conversion and current control;

the control module is connected with the total voltage and current acquisition loop, acquires voltage and current signals as feedback signals according to the voltage and current requirements of the whole vehicle, and adjusts the output voltage and current by adopting a double closed-loop control method;

the CAN communication module is connected with the high-voltage conversion circuit, the double-end pre-charging circuit, the total voltage and current acquisition circuit and the control module, is communicated with other modules, and is used for carrying out time sequence control and self state uploading information according to the state of the whole vehicle;

and the BMS module monitors the battery state and determines the placement position of the module according to the power position.

As a preferred embodiment of the present invention, the BCU module further includes an insulation monitoring module, connected to the control module, for controlling switching of the insulation monitoring function during insulation monitoring.

In the specific implementation mode of the invention, by designing a standard parallel power management system, the system can be independently arranged on a vehicle or a battery pack, is communicated with a whole vehicle main control system or a whole vehicle power system, acquires power parallel parameters, and realizes the input/output function after parallel connection according to the whole vehicle power management strategy and the role of parallel power supplies.

The system can automatically manage parallel parameters, obeys the parallel requirements of the integrated system, is not limited by parameter ranges and battery types in the design parameter boundary of the integrated power supply, and can participate in the execution work of the working strategy of the power supply of the whole vehicle as long as the performance range can be matched with the requirements of the power supply system of the whole vehicle. The system does not need special battery power supply matching work, is quickly connected to the grid and can be used along with installation. The system can perform differentiated power input/output management, on-demand management in terms of battery capacity, efficiency, characteristics, and the like.

The invention provides a dual-power automatic balance fusion circuit of a range-extended vehicle, which comprises: the device comprises a power switch module, a capacitor, an inductor, a double-end pre-charging loop, a low-voltage control unit module, a fault diagnosis and storage module, an insulation monitoring module and a communication module. According to the required electricity and current information of the whole vehicle, a BUCK or BOOST loop is formed by using a capacitor, an inductor and a power switch, voltage and current signals are collected to be used as feedback signals, and a double closed-loop control method (a voltage control outer loop and a current control inner loop) is adopted to regulate output voltage and current, so that the aims of not specially carrying out multi-power source matching, randomly merging battery power sources with random voltage in a wider power bus voltage range, and quickly connecting, merging, integrating, compatible and sharing newly added power sources are fulfilled.

The replaceable dual-power automatic balance fusion circuit for the extended range vehicle comprises a high-voltage conversion loop and a low-voltage control loop.

As shown in fig. 1, the high voltage conversion circuit in the system mainly includes: 1. the switch power supply, the capacitor, the inductor and the like form a bidirectional DC/DC high-voltage conversion circuit; 2. a dual ended pre-charge circuit. The bidirectional DC/DC high-voltage conversion circuit mainly comprises four symmetrical power switch modules, a BOOST or BUCK circuit is formed by controlling the on-off of the switch modules, the power switch modules are controlled according to the voltage of the collected power supply 1 and the voltage and current required by the whole vehicle, and the control mode is shown in figure 3.

Fig. 1 is a circuit diagram of a system, wherein the power source may be an energy/power battery or a super capacitor.

The high-voltage conversion circuit comprises a switch power supply, a capacitor, an inductor and the like to form a bidirectional DC/DC high-voltage conversion circuit; the double-end pre-charging loop solves the problem that the replaceable system is connected into the whole vehicle to impact the high-voltage current of the original vehicle system through the pre-charging loop in the process of the system initially entering the power-on, and protects the original vehicle high-voltage contactor, a safety device and the like.

The BCU module comprises a total voltage and current acquisition loop, provides basis for the control of the pre-charging contactor and provides basis for voltage conversion and current control; the insulation monitoring function can be selected, and when the original vehicle has insulation monitoring, the switching of the function can be selected; a diagnostic function; the CAN communication function is used for communicating with the whole vehicle, controlling time sequence and the like according to the state of the whole vehicle and uploading the state of the CAN communication function; and a BMS module for monitoring the battery state and determining whether the control unit includes the part of the functions according to whether the BMS module is mounted on the vehicle.

The purpose of the double-ended precharge circuit is as follows: 1. the pre-charging loop aims to judge the pre-charging degree through the pre-charging loop in the process of initial charging and power-on of the system according to the pressure difference between the rear end and the front end of the pre-charging loop, control the main loop to be switched on after the pre-charging is finished, solve the problem that the replaceable system is connected into the whole vehicle to impact the high-voltage current of the original vehicle system, and protect a high-voltage contactor, a safety device and the like of the whole vehicle; 2. the purpose of double-end pre-charging is that no matter the changeable dual-power automatic balance fusion circuit of the extended range vehicle is pre-installed on the vehicle or on the power supply 1, the problem of high-voltage current impact can be reduced through the pre-charging process; the dual-end pre-charging loop enhances the integrity of the system and reduces the dependence on or influence on the whole vehicle circuit.

The BCU module in the system comprises a, a total voltage and current acquisition loop, provides basis for the control of the pre-charging contactor, and provides basis for voltage conversion and current control; b. the control module is used for acquiring voltage and current signals as feedback signals according to the voltage and current requirements of the whole vehicle, adjusting output voltage and current by adopting a double closed-loop control method (a voltage control outer loop and a current control inner loop), and simultaneously has fault diagnosis and storage functions; c. the insulation monitoring function can be selected, and when the original vehicle has insulation monitoring, the switching of the function can be controlled through a program; d. the CAN communication function is used for communicating with the whole vehicle, controlling time sequence and the like according to the state of the whole vehicle and uploading the state of the CAN communication function; e. and a BMS module for monitoring a battery state, which can be positioned according to the position of the power supply 1.

The bidirectional conversion circuit enables the power supply 1 to be flexibly connected into the whole vehicle, and the bidirectional conversion circuit and the whole vehicle power supply can work in different charging and discharging states according to the power requirement of the whole vehicle, so that the flexibility of energy management of the whole vehicle can be greatly expanded.

Introduction of the use mode:

1. by evaluating whether a working voltage range of a system formed by the power supply 1 after the circuit with the automatic balance fusion of the replaceable double power supplies is additionally arranged and a working range of the whole vehicle are proper or not, when the two are intersected, the voltage matching can be considered to be successful, and the system can be accessed to the circuit of the whole vehicle after the voltage matching is successful;

2. after the whole vehicle is powered on, the voltage of a whole vehicle high-voltage bus and the power supply 1 are collected, and meanwhile, the communication is considered to obtain the voltage parameters of the whole vehicle, and a high-voltage and low-voltage power-on process is carried out, mainly relating to a high-voltage pre-charging process, wherein a main loop contactor in a circuit with the automatic balance fusion of a replaceable double power supply is closed when the pre-charging voltage difference is within 20V (can be adjusted according to actual conditions), and the high-voltage power-on process of a system is finished;

3. under the condition that the battery state of a power supply 1 is good, the voltage and the current of the system in 1 are regulated according to the power request of a whole vehicle VCU, so that the power requirement of the whole vehicle is met;

the system comprises a power switch module, a capacitor, an inductor, a double-end pre-charging loop, a low-voltage control unit module, a fault diagnosis and storage module, an insulation monitoring module, a communication module and a circuit based on a bidirectional DC/DC high-voltage conversion circuit and capable of realizing automatic balance fusion of a replaceable double power supply, the application range of the power supply is expanded, the aims that multi-power supply matching is not required specially, a battery power supply with random voltage in a wider power supply bus voltage range can be combined at will, and the purpose that a newly added power supply is connected in parallel, fused and compatible with sharing are achieved.

In the system, a power switch module, a capacitor and an inductor form a high-voltage main body part of the bidirectional DC/DC high-voltage conversion circuit. The double-end pre-charging loop in the system performs pre-charging management according to the collected voltage and voltage parameters obtained through communication with the whole vehicle, so that high-voltage current impact on the system is reduced, and the integrity of the system is improved.

By adopting the system for realizing the dual-power automatic balance fusion of the range-extended vehicle, the system can be independently arranged on the vehicle or a battery pack through designing a standard parallel power supply management system, is communicated with a whole vehicle main control system or a whole vehicle power supply system to obtain power supply parallel parameters, and realizes the input/output function after parallel connection according to the whole vehicle power supply management strategy and the role of a parallel power supply, thereby greatly expanding the flexibility of the energy management of the whole vehicle.

In this specification, the invention has been described with reference to specific embodiments thereof. It will, however, be evident that various modifications and changes may be made thereto without departing from the broader spirit and scope of the invention. The specification and drawings are, accordingly, to be regarded in an illustrative rather than a restrictive sense.