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A temperature control circuit and temperature control method based on a mobile terminal

A temperature control method and mobile terminal technology, applied in the direction of temperature control, non-electric variable control, control/regulation system, etc., can solve problems such as thermal runaway, explosion, etc., to prevent excessive temperature, reduce power loss, reduce The effect of the total current

Inactive Publication Date: 2019-09-24
SHANGHAI YUDE INFORMATION TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, during the use of lithium-ion batteries, there is a danger of explosion. The main reason is that there is a process of "thermal runaway" in the reaction inside the battery.

Method used

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  • A temperature control circuit and temperature control method based on a mobile terminal
  • A temperature control circuit and temperature control method based on a mobile terminal
  • A temperature control circuit and temperature control method based on a mobile terminal

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 2

[0073] In the above-mentioned implementation one, the current at both ends of the load is in a constant state through formula one, but the calculation of formula one is relatively complicated (iterative calculation method is usually used to calculate one by one), and the calculation speed is relatively slow. Based on this, the present invention further provides a Based on the temperature control circuit of the mobile terminal, the calculation complexity is reduced and the calculation efficiency is improved.

[0074] A temperature control circuit based on a mobile terminal, including: a first variable resistor R1 and a second variable resistor R2;

[0075] The first variable resistor R1 is connected in parallel with the load; further, the first variable resistor R1 is a negative temperature coefficient resistor;

[0076] The second variable resistor R2 is connected in series with a power supply, the power supply is a lithium battery C, further, the second variable resistor R2 i...

Embodiment 3

[0089] Such as figure 2 As shown, on the other hand, the present invention provides a temperature control method based on a mobile terminal, which includes:

[0090] Step S110, obtaining the current working temperature of the mobile terminal, and judging whether the working temperature is lower than the predetermined temperature;

[0091] Step S120, forming a first control signal and a second control signal when the working temperature is not less than the predetermined temperature;

[0092] Step S130, the first variable resistor adjusts the current first resistivity of the first variable resistor according to a predetermined method under the action of the first control signal;

[0093] Step S140 , the second variable resistor adjusts the current second resistivity of the second variable resistor according to a predetermined method under the action of the second control signal.

[0094] As a further preferred implementation, the above-mentioned temperature control method ba...

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Abstract

The present invention relates to the technical field of lithium ion batteries and especially relates to a temperature control circuit and temperature control method based on a mobile terminal. The temperature control circuit comprises a first variable resistor and a second variable resistor, the first variable resistor and a load are connected in parallel, and the second variable resistor and a power supply are connected in series. Since the first variable resistor R1 and the load are connected in parallel to reduce the resistance of a lithium battery C output end in the temperature control circuit, at the same time the shunt processing of the load is carried out through the first variable resistor R1, the current of two ends of the load is reduced, the damage to a load component by over high temperature is avoided, through the series connection of the second variable resistor R2, the total resistance of the temperature control circuit is improved, the current increase of the temperature control circuit due to the reduction of the resistance of the lithium battery C output end is avoided, the electric energy consumption of the temperature control circuit is reduced, and the use safety of mobile equipment is improved.

Description

technical field [0001] The invention relates to the technical field of lithium-ion batteries, and in particular provides a temperature control circuit and a temperature control method based on a mobile terminal. Background technique [0002] Lithium battery is the abbreviation of lithium-ion battery. Due to its chemical characteristics, when the battery voltage drops to an over-discharge voltage VDDL of 2.4-2.5V, the battery enters an over-discharge state. Generally, the internal protection circuit of the battery will keep it in an output lock state. When the lithium battery starts to charge from the over-discharge state, in order to protect the lithium battery from being damaged, it must be pre-charged with a small current. The pre-charge current IPRE is 10-30mA. When the battery voltage is VBATMINON, the mobile terminal starts up and then enters the charging state controlled by the main controller. [0003] Lithium-ion batteries are currently the most widely used batterie...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G05D23/24
Inventor 李承敏
Owner SHANGHAI YUDE INFORMATION TECH CO LTD
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