Battery balanced charging controller and battery module thereof

Abstract

The invention relates to a battery balanced charging controller and a battery module thereof. The battery balance charging controller comprises a voltage division device, a switch module and a balanced circuit, wherein the voltage division device is coupled between a first end and a second end of a battery and provides an upper reference potential and a lower reference potential, and the upper reference potential is higher than the lower reference potential; the switch module comprises a first switch and a second switch; the balanced circuit is coupled with a connecting point, the voltage division device and the switch module and determines whether balanced charging current flows through the first switch or the second switch or not according to the potential of the connecting point, the upper reference potential and the lower reference potential, which battery unit has insufficient voltage in the battery module is judged by utilizing the reference voltage provided by the voltage division device, and the balanced circuit is adopted to control the switch module so that the charging current of the battery unit with lower voltage is higher than that of a battery unit with higher voltage, thereby the voltages of all batteries can be ensured to be consistent while in fully charging. The battery module comprises battery units with the number of N+1and battery balanced charging controllers with the number of N, can be applied to battery balanced charging controllers and has wider application scope.

Description

technical field [0001] The invention relates to a battery balancing charging controller and a battery module thereof, in particular to a battery balancing charging controller and a battery module for balancing battery charging. Background technique [0002] With the development of portable electronic products, the demand for rechargeable batteries also arises. Rechargeable batteries include conventional nickel-cadmium batteries, subsequently developed nickel-metal hydride batteries, lithium-ion batteries, and the latest developed lithium polymer (Li-Polymer) batteries. Different types of rechargeable batteries provide different voltages, and the operating voltages required by portable electronic products are also different. Therefore, battery manufacturers will match the operating voltage of portable electronic products, and connect several batteries in series to form a battery module to provide the required voltage. [0003] When the power of the battery is exhausted, the...

AI Technical Summary

Problems solved by technology

[0006] However, the battery voltage needs to be converted into a digital signal by an analog / digital converter before the digital battery balance microprocessor 5 can process it, and the analog / digital converter will greatly increase the chip area 10 of the digital battery balance controller 10, Therefore, there is a disadvantage that the cost is quite high

In addition, the digital battery balancing microprocessor 5 will be limited by the original design, for example: ISL9208 can only support a battery module composed of 5 to 7 batteries, and its applicable range will be limited accordingly

[0007] It can be seen that the above-mentioned existing digital battery balancing charge controller and its battery module obviously still have inconvenience and defects in structure and use, and need to be further improved urgently.

In order to solve the above-mentioned problems, the relevant manufacturers have tried their best to find a solution, but no suitable design has been developed for a long time, and the general products do not have an appropriate structure to solve the above-mentioned problems. This is obviously related. The problem that the industry is eager to solve

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