Series-parallel connection converter

A converter and parallel technology, which is applied in parallel conversion of batteries, current collectors, electric vehicles, etc., can solve the problems of expensive high-power electronic components, difficult promotion, high-power heat loss, etc. , the effect of increasing life expectancy

Pending Publication Date: 2017-02-22
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These circuits belong to the automatic control type, and all use electronic components to implement monitoring and conversion. They are characterized by fast conversion speed, but their charging and discharging currents flow through the electronic components, which will inevitably cause large power heat loss.
Due to the high price of high-power electronic components, high energy consumption, short service life of continuous use, and high cost compared with battery packs and chargers, it is difficult to promote such products in the civilian field.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] 3 battery cells ( E 1~ E 3) To form a battery pack, the required series-parallel converter principle and circuit are as follows figure 1 shown. The battery cell is a 12V12AHr lead-acid battery commonly used in electric bicycles, the charging current is D 1~ D 3 Select 3 low-cost and high-quality IN5406 rectifier diodes; K -1~ K -3 share a mushroom head button switch (LAY37 type, 2-layer building block type with 4 sets of linkage contacts, and 1 set is free). Insert the diode ( D 1~ D 3) According to figure 1 They are respectively welded on the pins of the contacts (A normally closed and B normally open) corresponding to each knife of the button switch, and form a whole with the mushroom head button switch. At this point, the series-parallel converter is completed.

[0033] diode D 1~ D 3, the positive pole is connected to the battery cell E 1~ E 3 connected to the negative pole, and then respectively connected to the mushroom head button switch K _1~ K Th...

Embodiment 2

[0036] 4 battery cells ( E 1 ~ E 4 ) to form a battery pack, the required series-parallel converter principle and circuit such as figure 2 shown. The battery cell is a 3.6V4.4AHr lithium-ion battery of a notebook computer, the online current is ≯5A, the charging current is ≯2A, and the voltage of the battery pack composed of 4 battery cells is 14.4V. D 1~ D 4 Select 4 low-cost and high-quality MBR5200 Schottky diodes; K -1~ K -4 share a ceramic rotary double-throw switch (KCZ type, 4 pins, 2 gears, 2 layers), and connect the 2 layers of each pin in parallel as a group (for example K -1), to enhance the reliability and life of the switch with double redundancy. Insert the diode ( D 1~ D 4) According to figure 2 They are respectively welded on the pins of the corresponding contacts (A, B) of each knife of the switch, and form a whole with the ceramic rotary switch. At this point, the series-parallel converter is completed.

[0037] diode D 1~ D 4 The positive el...

Embodiment 3

[0040] 4 battery cells ( E 1 ~ E 4 ) to form a battery pack, using image 3 The principle and circuit of the series-parallel converter shown, this embodiment uses a quadruple relay J and 1 toggle switch L Compared with the first two examples, the cost is slightly higher to replace the poles and contacts in the double-throw switch. The battery cell is a 12V12AHr lead-acid battery commonly used in electric bicycles, the charging current is D 1~ D 4 Choose 4 low-cost and high-quality IN5406 rectifier diodes, J -1~ J -4 share a MY4N-J quadruple relay, L Choose a low-cost and high-quality MTS-102 torsion switch. Insert the diode ( D 1~ D 4) According to image 3 Solder them on the pins of the corresponding contacts (A normally closed and B normally open) respectively, and form a whole with the relay; the electromagnetic coil of the relay J with toggle switch L in series, press image 3 Connect the two ends to the positive and negative poles of the charging port (In&O...

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Abstract

The invention relates to a series-parallel connection converter, and belongs to the field of electrotechnics. The series-parallel connection converter is characterized in that the series-parallel connection converter corresponds to n single batteries E1, E2, ..., and En in battery packs, only a single n-pole double-throw switch K and n diodes D1, D2, ... and Dn are required by the series-parallel connection converter, and the n diodes D1, D2, ..., Dn are only used in a charge circuit; anodes of the diodes are respectively connected with cathodes of the single batteries and are respectively connected with normally open contacts in the n-pole double-throw switch; cathodes of the diodes are connected with one another in parallel and are further connected with a normally closed contact An of K_n in the n-pole double-throw switch, and normally closed contacts A1-An-1 of K_1-K_n-1 in the n-pole double-throw switch are connected with one another in parallel, are further connected with the anode of the single battery E1 and are led out by wires to be used as an anode port +In&Out for being connected with external equipment; the anodes of the single batteries E2-En are respectively connected with pole electrodes K_1-K-n-1 in the n-pole double-throw switch, and a pole electrode K_n in the n-pole double-throw switch is led out by a wire to be used as a cathode port -In&Out for being connected with the external equipment. The series-parallel connection converter has the advantages of few components, simplicity in manufacture and high cost performance.

Description

technical field [0001] The invention relates to a series-parallel converter, which belongs to the field of electrotechnical technology. Background technique [0002] Due to the rapid development of new energy technology and the continuous progress of material science, various rechargeable batteries are replacing disposable batteries in more and more fields, and gradually become the preferred energy source for power supply on the move. The voltage required by the load (electrical appliance) is often higher than the output voltage of a single battery, so it is necessary to connect n battery cells in series to provide an appropriate voltage output. For reasons such as short life, these battery packs have basically been charged in series so far. [0003] The drawbacks of series charging battery packs are obvious. Since the material, size and chemical reaction inside each battery cannot be guaranteed to be consistent, the terminal voltage of each battery cell after discharge ha...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J7/00
CPCH02J7/0024
Inventor 杨华舒杨宇璐吴霞周新伟李东董卫
Owner KUNMING UNIV OF SCI & TECH
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