Battery pack charging control method and charging assembly

A charging control method and a technology of charging components, which are applied in battery circuit devices, electrical components, charge equalization circuits, etc., and can solve problems such as inability to guarantee battery 1, inability to ensure a balanced state, etc.

Pending Publication Date: 2017-05-31
JOULWATT TECH INC LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At this time, it cannot be guaranteed that the voltage of battery 1 has reached the balanced voltage of battery 1 and battery 2, so it cannot be guaranteed to reach a balanced state

Method used

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  • Battery pack charging control method and charging assembly
  • Battery pack charging control method and charging assembly
  • Battery pack charging control method and charging assembly

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] A charging control method for a battery pack, comprising the steps of:

[0039] S200: During the charging process of the battery pack, the voltage of each battery in the battery pack is compared with the corresponding threshold voltage, and when at least one of the battery voltages reaches its corresponding threshold voltage, an equalizing current is turned on to discharge the battery that reaches the corresponding threshold voltage;

[0040] S201: After the balanced current is generated, continue to judge whether at least one of the battery voltages has reached its corresponding threshold voltage, and when the balanced current reaches its maximum current, the above threshold voltage condition is still reached, then by controlling the alternate conduction of the charging switch and cutoff to reduce the average charging current until the battery voltage drops below its corresponding threshold voltage.

[0041] In this implementation, when the threshold voltage condition ...

Embodiment 2

[0043] A charging control method for a battery pack, comprising the steps of:

[0044] S300: During the charging process of the battery pack, the voltage of each battery in the battery pack is compared with the corresponding threshold voltage, and when at least one of the battery voltages reaches its corresponding threshold voltage, an equalizing current is turned on to discharge the battery that reaches the corresponding threshold voltage;

[0045] S301: During the equalizing current discharge process, increase the voltage drop on the charging switch to make it work in a linear mode, so as to reduce the charging current until the battery voltage is lowered below its corresponding threshold voltage.

[0046] During the charging process of the battery pack, the power status of the battery pack is detected in real time. When the battery pack is not fully charged, the constant current charging mode is adopted. When the equalizing current reaches its maximum current and still reac...

Embodiment 4

[0058] Such as image 3 As shown, the equalization circuit includes an output adjustment circuit, an operational amplifier and diodes, and the number of operational amplifiers and diodes is set in one-to-one correspondence with the number of sampling signals. The operational amplifier includes a first input terminal, a second input terminal and an output terminal, the first input terminal receives a sampling signal, the second input terminal receives a reference signal corresponding to the sampling signal, and the output terminal is coupled to one end of a corresponding diode of the operational amplifier, The other end of the diode is coupled to the output adjustment circuit, and the common end of the output adjustment circuit and the diode is coupled to the control end of the charging switch. The function of the output adjustment circuit is to increase the voltage drop on the charging switch, which can be a pull-up circuit or a pull-down circuit, mainly depending on the type ...

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PUM

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Abstract

The present invention provides a battery pack charging control method, which comprises the following steps: during the charging process of a battery pack, each battery voltage and / or the voltage difference between batteries to be balanced in the battery pack are separately compared with corresponding thresholds, if at least one battery voltage reaches the corresponding threshold voltage and / or the voltage difference between the batteries to be balanced reaches the corresponding voltage difference threshold, an equilibrium current is started for discharging of the battery which reaches the corresponding threshold voltage, or for discharging of the high-voltage battery which reaches the voltage difference threshold; during the discharging process of the equilibrium current, a charging switch is controlled to be alternately on and off to reduce the average current of charging; or the voltage drop of the charging switch is increased to enable the charging switch to work in a linear mode, in order to reduce the charging current until the battery voltage decreases to be lower than the corresponding threshold voltage and / or the voltage difference between the batteries to be balanced is reduced to the corresponding voltage difference threshold.

Description

technical field [0001] The invention relates to the technical field of battery charging, in particular to a battery pack charging control method and a charging assembly. Background technique [0002] A battery pack generally consists of several batteries connected in series. In order to prolong battery life and balance the battery during charging and discharging, the battery charging component includes a battery balancing circuit and a battery balancing switch. In order to protect the battery during charging and discharging, there are charging switch M1 and discharging switch M2 in the charging component respectively. Such as figure 1 The battery pack shown is composed of two batteries connected in series. The battery balancing circuit U1 samples the voltages of battery 1 and battery 2. When the voltage of battery 1 is higher than the voltage of battery 2 by a certain value, the battery balancing circuit generates a control signal G1 to make The switch K1 is turned on to ...

Claims

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Application Information

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IPC IPC(8): H02J7/00
CPCH02J7/0016Y02E60/10
Inventor 黄必亮林利瑜张安羊任远程周逊伟
Owner JOULWATT TECH INC LTD
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