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Vehicle-mounted intelligent charging system and method

An intelligent charging method and charging time technology, applied in electric vehicle charging technology, charging station, vehicle energy storage, etc., can solve the problems of insufficient comprehensiveness, reliability and intelligence, different prices, power battery damage, etc., to achieve optimal charging method, cost reduction and waste reduction effect

Active Publication Date: 2016-06-15
GUANGZHOU CHENGXING ZHIDONG AUTOMOTIVE TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in many areas, electricity prices are different in different time periods, for example, electricity prices may be different during the day and late at night, and electricity prices may also be different during peak and off-peak periods
Even if some electric vehicles take into account the impact of electricity price parameters when charging, it will cause damage to the power battery, and it is impossible to reduce the cost while ensuring the life of the battery, and it is impossible to forcibly charge the power battery when the electricity price exceeds the threshold. It is not comprehensive, reliable and intelligent enough to meet the requirements of more electric energy in special cases

Method used

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  • Vehicle-mounted intelligent charging system and method

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Embodiment 1

[0064] image 3 It is a topological diagram of an electric vehicle. For the sake of simplifying the diagram and expressing convenience, only the electric vehicle components related to the present invention are marked in the topological diagram. like image 3 As shown, the electric vehicle is mainly composed of a power battery, an electronic control unit, a motor (subtraction), the charging system of the present invention and an energy converter.

[0065] For the convenience of expression, this embodiment will take a lithium-ion battery electric vehicle as an example, but it is not limited thereto. The power battery of the vehicle contains a certain number of battery cells. One or more cells are connected in parallel to form a module, and the voltage of the module will be close to that of a single cell, and the capacity will expand as the number of parallel cells increases. One or several such modules are connected in series to form a module whose capacity is close to that o...

Embodiment 2

[0078] The specific implementation principle of a vehicle-mounted intelligent charging method of the present invention is as follows:

[0079] Under normal circumstances, after the user parks the vehicle properly and plugs in the charging plug, the vehicle has entered the charging state, and the charging control module can control the charging on and off at any time. On this basis, the cost control module compares the real-time electricity price curve with the electricity price threshold set by the user. When the real-time electricity price is lower than the threshold, it notifies the charging control module to close the charging switch of the vehicle and start charging the power battery; when the electricity price rises When the threshold is exceeded, or when the preset target power has been reached, the cost control module notifies the charging control module to disconnect the charging switch and stop charging the power battery. Since there may be other risks, such as the ve...

Embodiment 3

[0089] The real-time charging power value, voltage value, current value, etc. of the present invention are calculated by the BMS system according to the current state of the vehicle (such as fault level, battery SOC state, charger power limit, charging equipment power limit, etc.), and real-time to the charging system Send to limit the charging power from the perspective of safety. This calculation formula and algorithm are general control strategy algorithms of BMS, and will not be described in detail here.

[0090] Taking a lithium battery as an example, the target power level for charging is generally at or below the healthy power level by default, that is, ≤80%. The charging current before this amount is generally a fixed value (in the constant current stage). For example, in the entire charging system, the charger limits the maximum charging power to 3.3kW, and the constant current charging current I Chg =10A. Let the total battery capacity be Cap, and the current charg...

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Abstract

The invention discloses a vehicle-mounted intelligent charging system and method. The method includes the steps that S1, needed charging parameters are obtained; S2, remaining essential charging time and remaining charging time are calculated in real time according to the obtained charging parameters; S3, whether the remaining charging time is longer than the remaining essential charging time is judged, if yes, a low-price stage is started and the step S4 is executed at the moment, and if not, a capacity expansion stage is started and a power grid is forced to charge a battery; and S4, whether the current real-time electricity price is lower than a set electricity price threshold value is judged, if yes, the power grid is made to charge the battery until the electricity quantity reaches set target electricity quantity of the low-price stage, and if not, charging of the battery is suspended until the next electricity price judging moment; the set target electricity quantity of the low-price stage is within the healthy capacity range of the battery. The vehicle-mounted intelligent charging system and method have the advantages of being comprehensive, reliable and high in intelligence degree, and can be widely applied to the technical field of charging.

Description

technical field [0001] The invention relates to the technical field of charging, in particular to a vehicle-mounted intelligent charging method and system. Background technique [0002] As we all know, electric vehicles are powered by their on-board power batteries. The power battery provides electric energy for the driving motor of the electric vehicle, and the electric motor converts the electric energy of the power supply into mechanical energy. When the power of the power battery is insufficient, the user needs to charge the power battery on the vehicle. However, improper charging methods may cause damage to the power battery, reduce battery life, and may also cause low charging efficiency and increase charging costs. [0003] At present, most electric vehicles only detect key parameters such as voltage and current when charging, and their charging logic is mostly determined according to the battery status of the vehicle itself, without considering external factors suc...

Claims

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Application Information

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IPC IPC(8): B60L11/18
CPCB60L53/64Y02T10/70Y02T10/7072Y02T90/12
Inventor 韩智夏珩杨春雷张江忠张伟友
Owner GUANGZHOU CHENGXING ZHIDONG AUTOMOTIVE TECH CO LTD
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