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Multifunctional integrated charger for electric automobile having compensation charging function

An electric vehicle, multi-functional technology, applied in electric vehicles, battery circuit devices, current collectors, etc., can solve the problem that auxiliary batteries cannot recover braking energy

Inactive Publication Date: 2011-07-27
TIANJIN QINGYUAN ELECTRIC VEHICLE
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The DC / DC module outputs a constant working voltage, generally 13.5V (for cars or mini cars) or 27V (for passenger cars), so it can only provide floating charge for the auxiliary battery, so that the auxiliary battery is always fully charged or close to it Fully charged, so the auxiliary battery cannot recover braking energy

Method used

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  • Multifunctional integrated charger for electric automobile having compensation charging function
  • Multifunctional integrated charger for electric automobile having compensation charging function
  • Multifunctional integrated charger for electric automobile having compensation charging function

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Embodiment Construction

[0020] figure 2 It is the principle block diagram of electric vehicle compensation charging. figure 2 Including power battery, motor controller, drive motor, compensation charging module, auxiliary battery, high-voltage DC bus, three-phase AC bus, low-voltage DC bus. The power battery, motor controller and compensation charging module are connected through a high-voltage DC bus, the motor controller is connected with the driving motor through a three-phase AC bus, and the compensation charging module is connected with the auxiliary battery through a low-voltage DC bus.

[0021] When the electric vehicle brakes, figure 2 The electric energy generated by the driving motor in the battery enters the motor controller through the three-phase AC bus, and is converted into high-voltage DC, and then divided into two parts through the high-voltage DC bus, one part enters the power battery, and the other part enters the compensation charging module. The energy entering the power bat...

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Abstract

The invention belongs to the field of charging technology of an electric automobile and relates to a multifunctional integrated charging machine which is used for the electric automobile and has a compensation charging function. The multifunctional integrated charging machine comprises a rectifier bridge, an inverter charging circuit, a control circuit, a contactor group, a power battery, an auxiliary battery, a brake feedback energy detection circuit, a power battery energy detection circuit and an auxiliary battery energy detection circuit; the output terminal of the rectifier bridge is connected with the inverter charging circuit which comprises a capacitance filter circuit, an IGBT inverter bridge with the duty cycle controlled by the control circuit, a high-frequency transformer and a rectifier filter circuit; different charging modes are changed by controlling the contactor group. The multifunctional integrated charging machine highly integrates four charging functions includingcompensation charging and the like into a charging machine, improves the integrity of the charging machine and leads the electric automobile to recover more brake energy.

Description

technical field [0001] The invention belongs to the technical field of electric vehicle charging, and relates to a multifunctional integrated charger with compensation charging. technical background [0002] The conventional charging of electric vehicles mainly includes the following three aspects: [0003] 1. During the parking charging process, the power battery is charged from the AC grid (referred to as "power charging") to supplement the energy of the power battery; [0004] 2. During the braking process, the braking energy is fed back to the power battery for charging (referred to as "feedback charging"), in order to recover the braking energy of the vehicle and improve the energy utilization rate; [0005] 3. During driving, the power battery floats and charges the auxiliary battery (hereinafter referred to as "float charging"), in order to maintain the energy of the auxiliary battery and cooperate with the auxiliary battery to provide low-voltage power supply for th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J7/02H02J7/00
Inventor 宫学庚梁枫韩毅马宇坤王雪李磊
Owner TIANJIN QINGYUAN ELECTRIC VEHICLE
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