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Monomer charging and discharging tail balancing module and battery pack balancing protection management system thereof

A technology for equalizing modules and battery packs, applied to battery circuit devices, current collectors, electric vehicles, etc., can solve problems such as long paths, low efficiency, and large number of switch tubes, and achieve the effect of simple circuits

Inactive Publication Date: 2013-11-06
宋锡和
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the shunt equalization technology is relatively mature, battery power is consumed during discharge equalization, and the equalization shunt current cannot be large, and small current shunt equalization cannot meet the needs of large-capacity electric motorcycles and electric vehicle battery packs
[0008]2. A small number of cascading equalization schemes that use capacitance or inductance to transfer charges between batteries have low efficiency due to long paths
Adopt capacitor cascading equalization scheme, use a large number of switch tubes, and the reliability and safety have yet to be broken through
[0009]3. Active conversion equalization: I have seen that a lithium manganese oxide electric bicycle charger uses a centralized converter on the side of the battery pack to charge the battery pack and the single battery at the same time Design; "Research on Energy Management System of Lithium-ion Batteries for Electric Vehicles" (Wanxiang Electric Vehicle Co., Ltd.) introduces "...the equalization function uses a high-efficiency DC-DC power conversion module...the battery with the lowest single voltage is used for supplementary charging...the equalization module It is not directly installed on the car...", it is only charging active conversion equalization; "Power Battery Pack Characteristic Analysis and Equalization Management" (written by Chen Shouping) states that "the equalizer is completed by a two-way high-frequency switching power supply circuit...Each equalizer The device corresponds to a single battery..." This is an active energy conversion equalization implemented by configuring a single-chip microcomputer in an electric vehicle, and the cost is very high, and it is impossible to implement it in an electric bicycle and electric motorcycle

Method used

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  • Monomer charging and discharging tail balancing module and battery pack balancing protection management system thereof
  • Monomer charging and discharging tail balancing module and battery pack balancing protection management system thereof
  • Monomer charging and discharging tail balancing module and battery pack balancing protection management system thereof

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Embodiment 1

[0049] see figure 1 , Embodiment 1 of the present invention consists of DC voltage conversion controller DC / DC, first voltage detector IC1, first photocoupler IC3 (including input light-emitting diode IC3d and output phototransistor IC3t), second photocoupler IC4 ( Contains input light-emitting diode IC4d and output phototransistor IC4t), field effect transistor Q1, transistor Q0, first resistor R0, second resistor R1, and third resistor R2. These components are welded (or bonded or integrated) in the same package (or printed circuit board) to form a modular structure. It is set with: output positive contact 'O+', output negative contact 'O － ’, input positive contact’ ∑B＋’ , input negative contact' ΣB-' , secondary control contact 'CT', equalization input contact 'b', charging control contact 'Cg'.

[0050] The DC / DC primary and secondary isolation of the DC voltage conversion controller is provided with an input positive pin 'I+' and an input negative pin 'I' － ’, outp...

Embodiment 2

[0069] see figure 2 , the present invention can also set the AND gate circuit IC5 and the fourth resistor R3 on the basis of the first embodiment. The output pin 'O' of the AND gate circuit IC5 is connected to the gate of the field effect transistor Q1, and the first input pin 'Ia' of the AND gate circuit IC5 is connected to the primary control pin 'ICT' of the DC voltage conversion controller DC / DC, and the AND gate circuit The second input pin 'Ib' of IC5 is connected to the collector of the output phototransistor IC3t of the first photocoupler IC3, and the fourth resistor R3 is connected to the DC / DC input positive pin 'I+' of the DC voltage conversion controller and the first photocoupler The output of IC3 is between the collectors of phototransistor IC3t.

[0070] Adding the AND circuit IC5 and the fourth resistor R3 can reduce the driving current of the first photocoupler IC3 to the μA level, which means that the current consumption of the battery pack by the balanced ...

Embodiment 3

[0072] see image 3 , the basic principle structure of embodiment 3 of the present invention is the same as embodiment 1, and the difference is that embodiment 3 is formed after embodiment 1 (replacing embodiment 1 with embodiment 2. Another embodiment 3 is also established, for simplicity, no drawing ) on the basis of setting the second voltage detector IC2, the second voltage detector IC2 is used to detect the charging equalization voltage, and has an input pin 'I', an output pin 'O', and a common pin 'g' on it; the second voltage detector The input pin 'I' of IC2 is connected to the output positive contact 'O+' of the single charge-discharge tail-compensation equalization module, and its output pin 'O' is connected to the input light-emitting diode IC4d of the second photocoupler IC4 through the third resistor R2. The first resistor R0 is connected to the base of the triode Q0, and its common pin 'g' is connected to the output negative contact of the single charge and disch...

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Abstract

The invention relates to a monomer charging and discharging tail balancing module and a battery pack balancing protection management system thereof. The monomer charging and discharging tail balancing module is provided with a direct-current voltage conversion controller, a first voltage detector, a first photoelectric coupler, a second photoelectric coupler, a field-effect tube, a triode, a first resistor, a second resistor and a third resistor. An output positive junction, an output negative junction, an input positive junction, an input negative junction, a secondary control junction, a balance input junction and a charging control junction are arranged on the module. The battery pack balancing protection management system is provided with a discharging control switch, a charging control switch, monomer charging and discharging tail balancing modules in same number with monomer batteries, a single battery protection integrated circuit with a balance pin (or without balance pin), a relay, a charger socket switch and a grid resistor. The invention has the advantages of simple circuit, independent charging and discharging tail balance and low energy consumption of a battery pack and can broaden volume and internal resistance errors among all the monomer batteries when assembling the battery pack.

Description

technical field [0001] The invention relates to a single charging and discharging tail-compensation equalization module and its battery pack equalization protection management system, which are mainly used in the equalization protection management system of the battery packs of electric vehicles, electric motorcycles and electric bicycles, and can also be used in large supercapacitor packs voltage balance protection. Background technique [0002] The main function of the battery pack management system is protection and equalization. The battery pack protection technology is very mature. For example, OMicro’s single-chip OZ890 can protect 13 series-connected battery packs, and 16 pieces of OZ890 can be cascaded to protect 208 series-connected battery packs; the protection voltage The detection accuracy can generally reach ±25mV, such as the S series battery protection integrated circuit of Seiko Electronics Corporation of Japan. [0003] Compared with protection technology, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J7/00
Inventor 宋锡和
Owner 宋锡和
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