Battery secondary balancing charging apparatus and method
A charging device and battery charging technology, which is applied in battery circuit devices, secondary battery charging/discharging, circuit devices, etc., can solve problems affecting the performance of battery packs, complicate balancing charging devices, and limit the application of battery packs. Strong, simple circuit, and the effect of improving performance
Active Publication Date: 2007-01-03
SHENZHEN CLICK TECH
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Problems solved by technology
[0004] The existing balanced charging method needs to use complex circuits to monitor the voltage of each battery cell and needs to discharge to achieve the voltage balance of each battery cell.
One of the disadvantages of this charging method and device is that there is no real direct connection between each battery cell in the battery pack, but a switch is added between the positive and negative poles of each battery cell The switch, the switch will form a resistance, which reduces the efficiency of high current operation, thereby limiting the application of the battery pack in the need of high current power battery, or just providing a method of monitoring the voltage of each battery cell without providing "in charge" In the process, the voltage of each battery cell is truly balanced and the requirement of 100% full charge is achieved”
The second disadvantage is: for a battery pack consisting of more than five battery cells, its balancing charging device will become very complicated and not very practical
The third deficiency is: due to the addition of voltage monitoring and balance control circuits in the battery pack, the leakage current of the battery pack in a static state increases. When the leakage current exceeds 200uA, it will affect the performance of the battery pack, especially in power tools
However, the existing technology does not provide a feasible method to reduce the leakage current
Method used
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[0027] The present invention will be described in further detail below through specific embodiments and in conjunction with the accompanying drawings.
[0028] Such as figure 1 As shown, the battery pack secondary balance charging device and method in this example include a charging control module 1, a charging power source 3 and a battery charging circuit 5, the charging control module 1 is electrically connected to the charging power source 3, and the charging power source 3 is electrically connected to the battery charging circuit 5 Connection, the battery charging circuit 5 includes a sampling circuit and a control switch, the charging control module 1 is connected to the sampling circuit and the control switch in the battery charging circuit, and the battery pack is often placed in the battery charging circuit.
[0029] The balance charging device and method of the present invention can be physically divided into two parts, and the two parts can be combined or separated b...
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The present invention discloses battery unit secondly balancing charging unit and charging method. Said device includes connected charging control module, charge power supply and battery charging circuit, featuring that neighbor battery contact and first battery cathode earthing through positive direction diode and control switch; neighbor battery contact and the last battery anode connecting charging voltage through backward diode and control switch. Due to battery unit is directly series connected, which avoids access switch resulted switch resistance, to make battery unit on heavy current applied status with higher efficiency, reducing switch resistance loss, and raising heavy current work efficiency. The present invention has simple circuit, capable of used in 4-10 series connected battery unit.
Description
technical field [0001] The invention relates to an electric energy storage system and a charging method thereof, in particular to a battery pack secondary balance charging device and method. Background technique [0002] The charging of the battery pack is divided into unbalanced charging and balanced charging. The so-called unbalanced charging method: refers to the charging device and method. During the charging process, the charging current is applied to the entire battery pack. During the charging process, the charging device monitors the entire battery pack. Voltage and temperature signals or monitor the voltage and temperature signals of each battery unit in the battery pack, and judge the charging status of the battery according to the monitored signals. If the voltage and temperature signals reach the set value, the charging will stop. For the charging device using the unbalanced charging method, since the charging current is only applied to the entire battery pack, i...
Claims
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Login to View More IPC IPC(8): H02J7/00H01M10/44
CPCY02E60/10
Inventor 周明亮
Owner SHENZHEN CLICK TECH