CN203119577U - Single section lithium ion battery charging circuit based on semiconductor thermoelectric power - Google Patents
Single section lithium ion battery charging circuit based on semiconductor thermoelectric power Download PDFInfo
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- CN203119577U CN203119577U CN 201320150793 CN201320150793U CN203119577U CN 203119577 U CN203119577 U CN 203119577U CN 201320150793 CN201320150793 CN 201320150793 CN 201320150793 U CN201320150793 U CN 201320150793U CN 203119577 U CN203119577 U CN 203119577U
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Abstract
The utility model discloses a single section lithium ion battery charging circuit based on semiconductor thermoelectric power, and an existing method has the defects that the existing method has high demands for a power supply and a compensating pipe has the problem of heat dissipation. The single section lithium ion battery charging circuit based on the semiconductor thermoelectric power produces a stabilized power supply after forming a voltage stabilization current limiting circuit which consists of two voltage stabilization chips, the voltage of the stabilized power supply is about 6V, the stabilized power supply is stabilized about 850mA, and charging chips use the stabilized power supply to charge for lithium ion batteries. When the voltage of the batteries is smaller than 2.5V, the charging chips supply 5mA small current to charge in advance, and charge for the lithium ion batteries by utilizing an external power supply in a rapid charging phase, and an external P channel field effect transistor is broken over in a judgment termination phase when the actual voltage of the lithium ion batteries is smaller than a threshold value. When charging close to the end, the turn-off time of the P channel field effect transistor is greatly bigger than the turn-on time, and finishes charging. The single section lithium ion battery charging circuit based on the semiconductor thermoelectric power has the advantages of small volume, low power consumption, high safety and excellent charging effect and the like.
Description
Technical field
The utility model belongs to industrial exhaust heat and efficiently utilizes the field, is specifically related to a kind of single-unit lithium ion cell charging circuit of based semiconductor thermo-electric generation.
Background technology
Power technology is important to industrial production, and in industrial processes, people generally use a large amount of lead acid accumulators that power supply is carried out storage and management.Compare with traditional lead acid accumulator, advantage such as lithium ion battery has, and energy density is big, average output voltage is high, but the superior fast charging and discharging of cycle performance, charge efficiency height and power output are big, and because its long service life does not contain poisonous harmful substance, be called as green battery.
In industrial production, often need measure high temperature explosive converter temperature inside.The power supply that the number of measurement internal temperature is adopted instrument generally has dual mode, or frequently changes lead accumulator and adopt the instrument power supply to number, or is to utilize wired supply power mode.Under the high temperature rotating environment, this dual mode has serious drawback, and frequently changing battery can influence enterprises production efficiency, and wired supply power mode is dangerous under rotating environment.Therefore need a kind of more intelligent power management.
Traditional charger for lithium ion battery scheme adopts the electric current gradual changed method; charging current when approaching fully charging, lithium battery is descended gradually; to reduce the voltage difference that charging current forms at the internal resistance of cell, protector and lead-in wire, improve the battery terminal voltage monitoring accuracy.This electric current gradual change is not that the electrochemical properties by battery requires, if there is additive method to guarantee to judge that battery fully charges, just can relax the requirement to charge power supply greatly.
Summary of the invention
The purpose of this utility model is exactly at the deficiencies in the prior art, and a kind of single-unit lithium ion cell charging circuit of based semiconductor thermo-electric generation is provided.
The single-unit lithium ion cell charging circuit of a kind of based semiconductor thermo-electric generation of the utility model comprises temperature-difference power generation module, current limliting voltage stabilizing circuit module, charging circuit module and single-unit lithium ionic cell module.
Temperature-difference power generation module comprises thermo-electric generation power supply P1, has 2 two ports of output port 1 and output port.
Current limliting voltage stabilizing circuit module comprises the first electrochemical capacitor C1, the second electrochemical capacitor C2, the 3rd electrochemical capacitor C3, the 4th electrochemical capacitor C4, the first voltage stabilizing chip U1, the second voltage stabilizing chip U2, the first rectifier diode D1, the second rectifier diode D2 and the 3rd rectifier diode D3, the first variable resistor R1, the second adjustable resistance R2 and the 3rd variable resistor R3, and the model that the first voltage stabilizing chip U1, the second voltage stabilizing chip U2 adopt is LM317T;
The port 2 of thermo-electric generation power supply P1 links to each other with the anode of the 3rd rectifier diode D3, the negative electrode of the 3rd rectifier diode D3 and the first electrochemical capacitor C1 positive pole, the second electrochemical capacitor C2 positive pole, 3 pin of the first voltage stabilizing chip U1 are connected with the negative electrode of the first rectifier diode D1,2 pin of the first voltage stabilizing chip U1 are connected with the end of the first variable resistor R1,1 pin of the first voltage stabilizing chip U1 and the other end of the first variable resistor R1,3 pin of the second voltage stabilizing chip U2 connect, 2 pin of the second voltage stabilizing chip U2 and the second adjustable resistance R2 one end, the anode of the first rectifier diode D1, the positive pole of the 3rd electrochemical capacitor C3, the 4th electrochemical capacitor C4 is anodal to be connected with the second rectifier diode D2 negative electrode, the port one of thermo-electric generation power supply P1 and the negative electrode of the first electrochemical capacitor C1, the negative electrode of the second electrochemical capacitor C2, the end of the 3rd variable resistor R3, the negative electrode of the 3rd electrochemical capacitor C3, the anode of the negative electrode of the 4th electrochemical capacitor C4 and the second rectifier diode D2 is connected and ground connection, 1 pin of the second voltage stabilizing chip U2 and the other end of the second adjustable resistance R2, the other end of the 3rd variable resistor R3 connects;
The charging circuit module comprises Schottky diode D5, matching capacitance C5, the 5th electrochemical capacitor C6, PMOS pipe Q1, build-out resistor R4, light-emitting diode D4, charging chip U3.Charging chip U3 adopts MAX1679,
The anode of Schottky diode D5 is connected with the anode of the second rectifier diode D2,1 pin of the negative electrode of the second rectifier diode D2 and charging chip U3, the anode of light-emitting diode D4 is connected with the grid of PMOS pipe Q1, the gate pole of PMOS pipe Q1 is connected with 2 pin of charging chip U3, the negative electrode of light-emitting diode D4 is connected with 3 pin of charging chip U3,5 pin of charging chip U3 are connected with the end of matching capacitance C5, the anode of the other end of matching capacitance C5 and the second rectifier diode D2,6 pin of charging chip U3, the end of build-out resistor R4, the negative pole of the 5th electrochemical capacitor C6 connects and ground connection, the source electrode of PMOS pipe Q1 and 4 pin of charging chip U3,8 pin, 1 pin of the positive pole of the 5th electrochemical capacitor C6 and single-unit lithium ionic cell module is connected, 7 pin of charging chip U3 are connected with the other end of build-out resistor R4,2 pin ground connection of single-unit lithium ionic cell module.
The beneficial effects of the utility model: utility model proposes the power mode of based semiconductor thermo-electric generation; utilizing the waste heat of high temperature converter to generate electricity charges to lithium ion; and adopt novel charging termination control scheme to relax requirement to power supply; use seldom outer member; constitute a practical charger cheaply, and realized discharging and recharging control and defencive function.
Description of drawings
Fig. 1 is hardware configuration schematic diagram of the present utility model.
Embodiment
As shown in Figure 1, the utility model comprises temperature-difference power generation module, current limliting voltage stabilizing circuit module, charging circuit module and single-unit lithium ionic cell module.
Temperature-difference power generation module comprises thermo-electric generation power supply P1, has 2 two ports of output port 1 and output port.
Current limliting voltage stabilizing circuit module comprises the first electrochemical capacitor C1, the second electrochemical capacitor C2, the 3rd electrochemical capacitor C3, the 4th electrochemical capacitor C4, the first voltage stabilizing chip U1, the second voltage stabilizing chip U2, the first rectifier diode D1, the second rectifier diode D2 and the 3rd rectifier diode D3, the first variable resistor R1, the second adjustable resistance R2 and the 3rd variable resistor R3, and the model that the first voltage stabilizing chip U1, the second voltage stabilizing chip U2 adopt is LM317T;
The port 2 of thermo-electric generation power supply P1 links to each other with the anode of the 3rd rectifier diode D3, the negative electrode of the 3rd rectifier diode D3 and the first electrochemical capacitor C1 positive pole, the second electrochemical capacitor C2 positive pole, 3 pin of the first voltage stabilizing chip U1 are connected with the negative electrode of the first rectifier diode D1,2 pin of the first voltage stabilizing chip U1 are connected with the end of the first variable resistor R1,1 pin of the first voltage stabilizing chip U1 and the other end of the first variable resistor R1,3 pin of the second voltage stabilizing chip U2 connect, 2 pin of the second voltage stabilizing chip U2 and the second adjustable resistance R2 one end, the anode of the first rectifier diode D1, the positive pole of the 3rd electrochemical capacitor C3, the 4th electrochemical capacitor C4 is anodal to be connected with the second rectifier diode D2 negative electrode, the port one of thermo-electric generation power supply P1 and the negative electrode of the first electrochemical capacitor C1, the negative electrode of the second electrochemical capacitor C2, the end of the 3rd variable resistor R3, the negative electrode of the 3rd electrochemical capacitor C3, the anode of the negative electrode of the 4th electrochemical capacitor C4 and the second rectifier diode D2 is connected and ground connection, 1 pin of the second voltage stabilizing chip U2 and the other end of the second adjustable resistance R2, the other end of the 3rd variable resistor R3 connects;
The charging circuit module comprises Schottky diode D5, matching capacitance C5, the 5th electrochemical capacitor C6, PMOS pipe Q1, build-out resistor R4, light-emitting diode D4, charging chip U3.Charging chip U3 adopts MAX1679,
The anode of Schottky diode D5 is connected with the anode of the second rectifier diode D2,1 pin of the negative electrode of the second rectifier diode D2 and charging chip U3, the anode of light-emitting diode D4 is connected with the grid of PMOS pipe Q1, the gate pole of PMOS pipe Q1 is connected with 2 pin of charging chip U3, the negative electrode of light-emitting diode D4 is connected with 3 pin of charging chip U3,5 pin of charging chip U3 are connected with the end of matching capacitance C5, the anode of the other end of matching capacitance C5 and the second rectifier diode D2,6 pin of charging chip U3, the end of build-out resistor R4, the negative pole of the 5th electrochemical capacitor C6 connects and ground connection, the source electrode of PMOS pipe Q1 and 4 pin of charging chip U3,8 pin, 1 pin of the positive pole of the 5th electrochemical capacitor C6 and single-unit lithium ionic cell module is connected, 7 pin of charging chip U3 are connected with the other end of build-out resistor R4,2 pin ground connection of single-unit lithium ionic cell module.
The work engineering is as follows: total process is divided into voltage stabilizing current limliting process and charge protection process.
Voltage stabilizing current limliting process is as follows: the unstable power supply that thermo-electric generation produces is imported from the P1 port, behind the current limliting Voltage stabilizing module, generation voltage is that 6V, electric current are the stabilized power supply of 850 mA, the size of electric current is regulated by the first variable resistor R1, and the big system of voltage regulates by the second adjustable resistance R2, the first variable resistor R3.
The charge protection process is divided into three phases: preliminary filling protection, quick charge process and termination are judged.
(1) preliminary filling protection: when MAX1679 detects the voltage of waiting to fill lithium-ions battery and is lower than 2.5 V, provide the little pre-charge of 5mA.When cell voltage during greater than 2.5V and less than charge threshold voltage (getting 4.2V) lithium ion battery begin quick charge, at this time LED is bright.
(2) in the quick charge stage, MAX 1679 opens external P-channel field-effect transistor (PEFT) pipe, and charging current is determined by the size of current that the power supply of outside provides.According to circuit diagram as can be seen pin TSEL and pin BATT join, the time of filling is 55 min soon to adopt such connected mode.Here need to prove that the P-channel field-effect transistor (PEFT) pipe is operated on off state, and nonlinear voltage regulator, so power consumption is minimum.
(3) stop the judgement stage: stopping the judgement stage, MAX1679 detects primary cell voltage every 2 ms, and the virtual voltage of battery is during less than threshold values, the conducting of outside P-channel field-effect transistor (PEFT) pipe.When charging approaches end, substantially exceed ON time the opening time of P-channel field-effect transistor (PEFT) pipe, charging finishes.
Claims (1)
1. the single-unit lithium ion cell charging circuit of a based semiconductor thermo-electric generation comprises temperature-difference power generation module, current limliting voltage stabilizing circuit module, charging circuit module and single-unit lithium ionic cell module;
It is characterized in that: described temperature-difference power generation module comprises thermo-electric generation power supply P1, has 2 two ports of output port 1 and output port;
Described current limliting voltage stabilizing circuit module comprises the first electrochemical capacitor C1, the second electrochemical capacitor C2, the 3rd electrochemical capacitor C3, the 4th electrochemical capacitor C4, the first voltage stabilizing chip U1, the second voltage stabilizing chip U2, the first rectifier diode D1, the second rectifier diode D2 and the 3rd rectifier diode D3, the first variable resistor R1, the second adjustable resistance R2 and the 3rd variable resistor R3, and the model that the first voltage stabilizing chip U1, the second voltage stabilizing chip U2 adopt is LM317T;
The port 2 of described thermo-electric generation power supply P1 links to each other with the anode of the 3rd rectifier diode D3, the negative electrode of the 3rd rectifier diode D3 and the first electrochemical capacitor C1 positive pole, the second electrochemical capacitor C2 positive pole, 3 pin of the first voltage stabilizing chip U1 are connected with the negative electrode of the first rectifier diode D1,2 pin of the first voltage stabilizing chip U1 are connected with the end of the first variable resistor R1,1 pin of the first voltage stabilizing chip U1 and the other end of the first variable resistor R1,3 pin of the second voltage stabilizing chip U2 connect, 2 pin of the second voltage stabilizing chip U2 and the second adjustable resistance R2 one end, the anode of the first rectifier diode D1, the positive pole of the 3rd electrochemical capacitor C3, the 4th electrochemical capacitor C4 is anodal to be connected with the second rectifier diode D2 negative electrode, the port one of thermo-electric generation power supply P1 and the negative electrode of the first electrochemical capacitor C1, the negative electrode of the second electrochemical capacitor C2, the end of the 3rd variable resistor R3, the negative electrode of the 3rd electrochemical capacitor C3, the anode of the negative electrode of the 4th electrochemical capacitor C4 and the second rectifier diode D2 is connected and ground connection, 1 pin of the second voltage stabilizing chip U2 and the other end of the second adjustable resistance R2, the other end of the 3rd variable resistor R3 connects;
Described charging circuit module comprises Schottky diode D5, matching capacitance C5, the 5th electrochemical capacitor C6, PMOS pipe Q1, build-out resistor R4, light-emitting diode D4, charging chip U3; Charging chip U3 adopts MAX1679,
The anode of Schottky diode D5 is connected with the anode of the second rectifier diode D2,1 pin of the negative electrode of the second rectifier diode D2 and charging chip U3, the anode of light-emitting diode D4 is connected with the grid of PMOS pipe Q1, the gate pole of PMOS pipe Q1 is connected with 2 pin of charging chip U3, the negative electrode of light-emitting diode D4 is connected with 3 pin of charging chip U3,5 pin of charging chip U3 are connected with the end of matching capacitance C5, the anode of the other end of matching capacitance C5 and the second rectifier diode D2,6 pin of charging chip U3, the end of build-out resistor R4, the negative pole of the 5th electrochemical capacitor C6 connects and ground connection, the source electrode of PMOS pipe Q1 and 4 pin of charging chip U3,8 pin, 1 pin of the positive pole of the 5th electrochemical capacitor C6 and single-unit lithium ionic cell module is connected, 7 pin of charging chip U3 are connected with the other end of build-out resistor R4,2 pin ground connection of single-unit lithium ionic cell module.
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201320150793 CN203119577U (en) | 2013-03-28 | 2013-03-28 | Single section lithium ion battery charging circuit based on semiconductor thermoelectric power |
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| CN 201320150793 CN203119577U (en) | 2013-03-28 | 2013-03-28 | Single section lithium ion battery charging circuit based on semiconductor thermoelectric power |
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| CN 201320150793 Expired - Fee Related CN203119577U (en) | 2013-03-28 | 2013-03-28 | Single section lithium ion battery charging circuit based on semiconductor thermoelectric power |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103236721A (en) * | 2013-03-28 | 2013-08-07 | 杭州电子科技大学 | Single lithium-ion battery charged circuit based on semiconductor thermoelectric power generation |
| CN104065121A (en) * | 2014-06-17 | 2014-09-24 | 青岛工学院 | Intelligent semiconductor temperature difference power generation controller and control method |
| CN105720315A (en) * | 2016-02-26 | 2016-06-29 | 成都雅骏新能源汽车科技股份有限公司 | Dynamic temperature difference based rapid DC charging method of power battery |
-
2013
- 2013-03-28 CN CN 201320150793 patent/CN203119577U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103236721A (en) * | 2013-03-28 | 2013-08-07 | 杭州电子科技大学 | Single lithium-ion battery charged circuit based on semiconductor thermoelectric power generation |
| CN104065121A (en) * | 2014-06-17 | 2014-09-24 | 青岛工学院 | Intelligent semiconductor temperature difference power generation controller and control method |
| CN105720315A (en) * | 2016-02-26 | 2016-06-29 | 成都雅骏新能源汽车科技股份有限公司 | Dynamic temperature difference based rapid DC charging method of power battery |
| CN105720315B (en) * | 2016-02-26 | 2018-03-16 | 成都雅骏新能源汽车科技股份有限公司 | A kind of electrokinetic cell fast-speed direct current charging method based on dynamic temperature difference |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130807 Termination date: 20190328 |