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Method for charging power battery under low-temperature environment

A power battery, low temperature environment technology, applied in the direction of secondary battery charging/discharging, secondary battery repair/maintenance, etc., can solve problems such as use troubles, and achieve the effect of enhancing ion activity

Pending Publication Date: 2017-09-22
OPTIMUM BATTERY CO LTD
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  • Abstract
  • Description
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Problems solved by technology

As a result, electric vehicles can travel 200 kilometers under the ideal battery capacity, but can only travel 40 kilometers under the actual battery capacity, which brings great trouble to the use

Method used

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  • Method for charging power battery under low-temperature environment
  • Method for charging power battery under low-temperature environment

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Embodiment Construction

[0008] In order to make the object, technical solution and beneficial technical effects of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific implementations described in this specification are only for explaining the present invention, not for limiting the present invention.

[0009] Such as figure 1 and figure 2 As shown, the present invention provides a method for charging a power battery in a low temperature environment, comprising the following steps:

[0010] S1: using the first current I1 to charge a power battery.

[0011] S2: Determine whether the highest cell voltage of the power battery reaches the first voltage U1, if not, go to step S1.

[0012] S3: If yes, reduce the charging current to the second current I2 and use the second current I2 to charge the power battery. By reducing the charging current, the...

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Abstract

The invention discloses a method for charging a power battery under a low-temperature environment. The method comprises the following steps of charging the power battery with a first current; judging whether highest single voltage of the power battery reaches a first voltage or not; reducing a charging current to a second current and charging the power battery with the second current if the highest single voltage of the power battery reaches the first voltage; judging whether the highest single voltage of the power battery reaches a full-charge voltage or not; reducing the charging current to zero if the highest single voltage of the power battery reaches the full-charge voltage; and ending charging. The method has the beneficial effects that the charging current is gradually increased according to a real-time voltage of the power battery, the temperature of the power battery is gradually increased by the charging current, so that the ion activity of the power battery is slowly improved, and the more energy can be stored in the power battery.

Description

【Technical field】 [0001] The invention relates to the technical field of batteries, in particular to a method for charging a power battery in a low-temperature environment. 【Background technique】 [0002] With the development of the new energy industry, electric vehicles (such as electric vehicles, electric trains, electric bicycles and golf carts) are becoming more and more popular among consumers. Electric vehicles generally use power batteries to provide power. However, the actual battery capacity of the power battery during charging is relatively easily affected by the external ambient temperature. When the external ambient temperature is relatively low, the ion activity inside the power battery will decrease, so that the actual battery capacity of the power battery will be greatly reduced. For example, the ideal battery capacity of the power battery is 5000 mAh, but the actual battery capacity is only 1000 mAh in a low-temperature environment (such as the external amb...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/44
CPCH01M10/44Y02E60/10
Inventor 丁勇倪尔福武宽
Owner OPTIMUM BATTERY CO LTD
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