Charging control method for new energy vehicle provided with lithium iron phosphate battery
A charging control method and technology of lithium iron phosphate battery, applied in the direction of secondary battery charging/discharging, secondary battery, secondary battery repair/maintenance, etc., can solve problems such as battery failure, battery fire and explosion, and slow battery charging speed. , to achieve the effect of simple and effective control process and prolong service life
Active Publication Date: 2020-08-11
JIANGXI KAMA BONLUCK BUSINESS BUS
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Problems solved by technology
[0002]The charging of new energy vehicles is divided into two stages: constant current and constant voltage, among which the constant voltage stage is the most critical stage related to whether the power battery can be fully charged. The charging control method at this stage will affect the capacity and service life of the battery, and affect the safety of the power battery
Excessive charging current in the constant voltage stage will cause the battery to fail to be fully charged and even lead to safety accidents such as battery overcharging and fire and explosion; while charging current that is too small will affect the charging time of the battery and cause the battery charging speed to be too slow
Method used
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[0027] Example: see Figure 1-7 .
[0028] A charging control method for a new energy vehicle equipped with a lithium iron phosphate battery, comprising the following steps:
[0029] S1. When charging is turned on, increase the charging current according to the step size, charging once every 5S; charging current I=10+N x ×S, when the charging current does not reach the allowable charging current, the charger will charge according to the actual charging current until the charging current is equal to the current allowable charging current I 0 start constant current charging;
[0030] S2. During the charging process, when the temperature of the battery changes, the corresponding charging current is also adjusted accordingly: when the temperature rises during the charging process, and the current maximum temperature T max The battery module and the minimum temperature T min The battery module corresponds to the allowable charging current I 0 When the smaller value of changes,...
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The invention discloses a charging control method for a new energy vehicle provided with a lithium iron phosphate battery. Aiming at the constant current stage and the constant voltage stage in the charging process of the new energy automobile battery, different charging control strategies are adopted according to the corresponding relation between the charging current and the battery temperatureand the corresponding relation between the charging current and the residual capacity of the battery, the charging current in the charging process of the battery is reasonably controlled, and the charging current can be correspondingly adjusted along with the change of the battery temperature. The method is simple and effective in control flow, can ensure that the temperature of the battery is nottoo high in the charging process of the battery, enables the battery to be quickly charged to a full charge state, effectively prolongs the service life of the battery, guarantees the charging safetyof the battery new energy vehicle, and solves a problem of too long charging time.
Description
technical field [0001] The invention relates to the field of battery technology, in particular to a charging control method for a new energy vehicle equipped with a lithium iron phosphate battery. Background technique [0002] The charging of new energy vehicles is divided into two stages of constant current and constant voltage. The constant voltage stage is the most critical stage related to whether the power battery can be fully charged. The charging control method at this stage will affect the capacity and service life of the battery. And affect the safety of the power battery. Excessive charging current in the constant voltage stage will cause the battery to fail to be fully charged and even lead to safety accidents such as overcharging and explosion of the battery; while charging current that is too small will affect the charging time of the battery and cause the battery charging speed to be too slow. Contents of the invention [0003] The purpose of the present inv...
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IPC IPC(8): H01M10/44
CPCH01M10/443H01M10/446Y02E60/10Y02T10/70
Inventor 罗丙荷
Owner JIANGXI KAMA BONLUCK BUSINESS BUS