Series-battery-pack equalization system and control method thereof
A technology of battery pack and balancing system, applied in charge balancing circuit, battery circuit device, charging/discharging of secondary battery, etc., to achieve the effect of less energy consumption and simple circuit
Active Publication Date: 2015-02-18
北京厚旭储能科技有限公司
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[0007] Aiming at the defects of the prior art, the object of the present invention is to provide a balance system and control method for series battery packs, aiming to solve the problem of balance in the charging and discharging process of series battery packs
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[0042] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.
[0043] Such as figure 1 As shown, the balance system of the series storage battery pack of the present invention includes a charging converter 11, a series storage battery pack 12, a discharge converter 13 and a control circuit 14; The converter 13 supplies power to the load, the control circuit 14 is connected to the battery pack 12 in series, and obtains the voltage value parameter of each battery unit in the battery pack in series from the battery pack 12 in series, and the control circuit 14 also samples the overall voltage value and charging current of the battery pack 12 in series value. Th...
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The invention discloses a series-battery-pack equalization system and a control method thereof. The series-battery-pack equalization system comprises a charge converter, a series battery pack, a discharge converter and a control circuit; the charge converter charges the series battery pack, and the series battery pack powers a load through the discharge converter; the control circuit is used for acquiring the voltage value of each battery unit in the series battery pack and finding out the battery units exceeding voltage upper-limit and voltage lower-limit; the control circuit controls bypass switches and shutdown switches of the battery units so as to enable the battery units to run on a first running state or a second running state. Charging voltage and charging current of the charging inverter are controlled trough the control circuit according to the state number of the battery units in the series battery pack, so that equalizing charge and discharge of the series battery pack can be realized. The series-battery-pack equalization system and the control method thereof are small in energy consumption, the battery units are large in capacity, and the simplicity in the circuit is achieved.
Description
technical field [0001] The invention belongs to the technical field of balance control of series storage batteries, and more specifically relates to a series balance system of battery packs and a control method thereof. Background technique [0002] Batteries can be divided into lead-acid batteries, nickel-metal hydride batteries, lithium-ion batteries, and nickel-cadmium batteries according to the electrochemical materials used. According to its electrochemical characteristics, the voltage of various battery cells is different. For example, the rated voltage of a lead-acid battery is 2V, and the rated voltage of a lithium battery is 3.7V. [0003] The battery can be composed of one battery cell; it can also be composed of multiple cells connected in parallel to increase the ampere-hour capacity of the battery; it can also be composed of multiple cells connected in series to increase the voltage of the battery; or multiple cells can be connected in series and Parallel mixin...
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IPC IPC(8): H02J7/00H01M10/44
CPCH02J7/0016H02J7/007H02J2207/10H02J2207/20
Inventor 危立辉
Owner 北京厚旭储能科技有限公司