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Pulse charging method

A technology of pulse charging and charging, applied in the direction of secondary battery charging/discharging, batteries, circuits, etc., can solve the problems of reducing battery life, restricting the development and popularization of electric vehicles, and not being able to fully charge the battery, so as to prolong the service life , Fully charged effect

Inactive Publication Date: 2014-01-08
HUIZHOU EPOWER ELECTRONICS
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Problems solved by technology

This method has never stopped during the entire charging process. Only when the charging is completed, the battery is disconnected and stopped. During charging, the temperature of the battery continues to rise due to molecular movement and accumulation. During the charging process, due to the phenomenon of battery polarization, the battery The power cannot be fully charged, and this charging method also reduces the life of the battery
[0003] At present, there are few studies on the charging methods of electric vehicle battery systems, and some theoretical and technical issues still need to be tackled. The development of chargers cannot meet the requirements of electric vehicles, which seriously restricts the development and popularization of electric vehicles.
In addition, currently newly built charging stations are generally implemented with no one on duty or few people on duty, which requires higher reliability and automation of the charger, more complete functions, and higher maintenance-free performance. The current charger does not have these functions

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Embodiment Construction

[0015] In order to facilitate those skilled in the art to understand the technical content of the present invention, the present invention will be further described in detail below in conjunction with the embodiments.

[0016] Such as figure 2 As shown, in the pulse charging method disclosed in the present invention, the charging process successively includes a trickle charging zone, a constant current charging zone and a pulse charging zone. When the battery runs out and needs to be charged, the battery system is connected to the charger, and the charger first performs charging preprocessing. First charge the battery gently with a small level of current and charge it for a period of time to see if the battery voltage can rise to the primary threshold voltage (different batteries have different primary threshold voltages). If the first-level threshold voltage cannot be reached within 5 minutes, it is determined that the battery is scrapped; if it can reach the first-level th...

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Abstract

The invention discloses a pulse charging method. The charging process successively comprises a trickle charging zone, a constant-current charging zone and a pulse charging zone; during charging, trickle charging is firstly employed for pre-charging, and when the voltage of a battery reaches a set first-level threshold voltage, the processes enters into the constant-current charging zone; when the voltage of the battery reaches to a set second-level threshold voltage, the processes enters into the pulse charging zone; and until the voltage reducing speed of the battery is less than a set value when the battery is in a standing state, charging is finished. According to the pulse charging method, pulse charging, which belongs to an intermittent charging depolarization measure, is employed at the charging terminal, so that the battery is always more closer to the primary charging state, and thus the battery is charged more thoroughly, and the service life of the battery is prolonged.

Description

technical field [0001] The invention relates to lithium battery charging of an electric vehicle, in particular to a pulse charging method. Background technique [0002] At present, with the theme of environmental protection, the development of new energy vehicles is in full swing. Lithium batteries used in new energy electric vehicles are mostly charged in the following ways: first pretreatment with trickle charging, then constant current charging, and finally constant voltage charging, such as figure 1 shown. This method has never stopped during the entire charging process. Only when the charging is completed, the battery is disconnected and stopped. During charging, the temperature of the battery continues to rise due to molecular movement and accumulation. During the charging process, due to the phenomenon of battery polarization, the battery The power cannot be fully charged, and this charging method also reduces the life of the battery. [0003] At present, there are...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/44
CPCY02E60/12H01M10/44H01M2220/20Y02E60/10
Inventor 刘飞文锋阮旭松韩广璞
Owner HUIZHOU EPOWER ELECTRONICS
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