Balanced judgment and supplementary device of energy transfer type battery pack and method thereof

An energy transfer, battery pack technology, applied in battery circuit devices, circuit devices, current collectors, etc., can solve the problems of unfavorable balance and small loss of series battery packs, and achieve the effect of low loss and improved balance.

Active Publication Date: 2011-02-16
武汉长海电力推进和化学电源有限公司
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  • Application Information

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Problems solved by technology

[0003] An object of the present invention is to solve the technical problem existing in the prior art that charging and discharging series-connected battery packs is not conducive to equalization under the condition of charging and discharging large-capacity series-connected battery packs; a constant current control mode is provided, which can It can be used together with the original charging and dischargin

Method used

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  • Balanced judgment and supplementary device of energy transfer type battery pack and method thereof
  • Balanced judgment and supplementary device of energy transfer type battery pack and method thereof
  • Balanced judgment and supplementary device of energy transfer type battery pack and method thereof

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Example Embodiment

[0038] Example 1:

[0039] This embodiment is an application example of an energy transfer type battery pack balance judgment and supplementary device of the present invention. like figure 1 As shown, it is connected in turn: Among them, the balance module 1: connects with each single battery, uses the energy of the battery pack or the energy of the external power supply to charge the single battery; measurement and control module 2: connects with the battery pack and each of them If the single battery is connected, measure and compare the single battery, determine whether the single battery needs to supplement energy and send a start / stop signal to the equalization module 1 . The equalization module 1 is sequentially connected with: first, a PWM switching DC-DC converter 3: used to charge the single battery; second, a measuring resistor 4 or a sensor 10: used to measure the output current; Its three, constant current control unit 5: carry out constant current control to t...

Example Embodiment

[0058] Example 2:

[0059] This embodiment is an embodiment of a method for balancing judgment and replenishment of an energy transfer battery pack by using an energy transfer battery pack balance judgment and supplementary device in the present invention. The steps are: step 5.1, measure the total voltage of the series battery pack connected to the differential op-amp unit 8 and the voltage of each single battery by the differential operational amplifier unit 8 in the measurement and control module 2; The operational amplifier unit 8 calculates the average voltage of the series battery pack battery according to the total voltage of the series battery pack measured in step 5.1 and the voltage of each single cell; step 5.3, compares the single cell voltage and The size of the average voltage of the battery pack, and according to the comparison result, send a start / stop signal to the above-mentioned isolation control unit 7, that is, choose to perform step 5.4 or step 5.5; aft...

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Abstract

The invention relates to a balanced judgment and supplementary device of an energy transfer type battery pack and a method thereof, which are mainly used on occasions when numerous batteries are connected in series for use in industry. The device comprises balancing modules and a measurement and control module, wherein the balancing modules are connected in turns, are connected with each single battery, and charge the single battery by using the energy of the battery pack or the energy of an external power supply; the measurement and control module is connected with the battery pack and each single battery therein, and measures and compares the single battery. The method comprises the following steps of: measuring and controlling the total voltage of battery packs connected in series and the voltage of each single battery; calculating the average voltage of the batteries of the battery packs connected in series; sending starting/stopping signals; and making the voltage of the single battery approach to the average voltage of the battery packs. The device and the method have the advantages of having the function of ensuring the voltage balancing, which is performed in a mode of energy transfer, of the single batteries of the battery packs connected in series in use, having small losses, and being favorable to be applied to middle or large-capacity battery packs.

Description

technical field [0001] The invention relates to an energy transfer type battery group equalization judging and replenishing device and method thereof, belonging to the technical field of batteries. Background technique [0002] For important power supply equipment in industrial applications, a set of batteries is required as a backup power supply, and the voltage of a single battery is not high, so it cannot be used directly. Generally, dozens or even hundreds of batteries are connected in series to increase the total voltage for use. Due to the inevitable performance inconsistency in the process of battery manufacture and use, when charging and discharging a battery pack in series, using a certain method to balance the voltage of each single battery will improve the use of the battery and prolong the service life of the battery. At present, there are some methods for balancing the charge and discharge of series-connected battery packs, most of which use the method of resist...

Claims

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Application Information

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IPC IPC(8): H02J7/00
Inventor 陈立剑蒋炜洪敏
Owner 武汉长海电力推进和化学电源有限公司
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