CN206378218U - A kind of temperature sensing circuit - Google Patents

A kind of temperature sensing circuit Download PDF

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Publication number
CN206378218U
CN206378218U CN201621134969.9U CN201621134969U CN206378218U CN 206378218 U CN206378218 U CN 206378218U CN 201621134969 U CN201621134969 U CN 201621134969U CN 206378218 U CN206378218 U CN 206378218U
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China
Prior art keywords
mcu module
mcu
ntc
utility
modules
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Active
Application number
CN201621134969.9U
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Chinese (zh)
Inventor
许思伟
朱立湘
尹志明
林军
刘辉
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Huizhou Blueway Electronic Co Ltd
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Huizhou Blueway Electronic Co Ltd
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Abstract

The utility model provides a kind of temperature sensing circuit, and the circuit includes:First MCU module;The power end being connected with one end of first MCU module(POWER);The first NTC modules being connected with one end of first MCU module(NTC 1);The first earth terminal being connected with the first NCT modules.When without fixed reference source, and be forced to use reserve battery management IC or integrated level very high MCU to be realized, or coordinate the design of the high costs such as MCU using constant reference reference source, so that our utility models design a kind of scheme of the effective controllable wide temperature range detection of low cost to realize.

Description

A kind of temperature sensing circuit
Technical field
The utility model is related to automation control area, more particularly to a kind of temperature sensing circuit.
Background technology
Field of lithium battery application is increasingly wide, during the use of lithium battery, its operating voltage, operating current and battery core temperature The performance parameters such as degree strictly must be controlled accurately within the scope of specified, to ensure the life-span of lithium battery and use safety. With continuing to develop and increasingly under the market competition background of fierceness for li-ion cell protection technology, high performance li-ion cell protection scheme Trend as enterprise development, promotes to be integrated with the lithium battery extremely client of safe and environment-friendly, high performance-price ratio lithium electric protection scheme With the favor of consumer.
At present, the temperature detection scheme that in the market is used in lithium battery mainly manages IC or using collection using reserve battery Detected into the MCU for spending high, or coordinate MCU to be detected using constant reference reference source, but the technical scheme of the above Testing cost is higher, is unfavorable for long-term development of enterprise.Especially designed in the temperature detection scheme of some a reference sources do not fixed In, the protection scheme of such as single lithium cell, it is, it is necessary to be taken from the both positive and negative polarity of battery core to carry out detection in the lithium battery to this type Electricity, the voltage of battery core is with the process of discharge and recharge, and constantly in change, fixed reference source is not available, so as to lead to not Accurate acquisition temperature, is unfavorable for the security performance detection of lithium battery, there is which hidden danger is great case group go.Therefore, how to design The technical scheme of a kind of inexpensive, practical and controllable wide temperature detection range turns into Corporation R & D and technical staff The direction of research and development.
Utility model content
Based on this, the utility model provides a kind of temperature sensing circuit.
A kind of temperature sensing circuit, described circuit includes:
First MCU module;
The power end being connected with one end of the first described MCU module;
The first NTC modules being connected with one end of the first described MCU module;
The first earth terminal being connected with the first described NCT modules.
In one of the embodiments, described circuit also includes:
Resistance Ra, is connected with the first described MCU module;
Resistance Rb, is connected with the first described MCU module.
In one of the embodiments, described circuit also includes:
Second MCU module, its one end is connected with described resistance Rb, and the other end is connected with the first NTC modules.
In one of the embodiments, the first described MCU module and the second MCU module are built-in with an adc sampled points.
Beneficial effect:
The utility model have it is simple for structure, it is practical, and when without fixed reference source, and be forced to use special Either integrated level very high MCU is realized or is coordinated the high costs such as MCU using constant reference reference source battery management IC Design so that a kind of scheme of low cost of our utility models design effectively controllable wide temperature range detection comes real It is existing.
Brief description of the drawings
In order to illustrate more clearly of the utility model operation logic and the technical scheme used, below will to operation logic and The accompanying drawing used required in the technology used is briefly described.It is clear that drawings in the following description are only this reality With some new operation examples, for those of ordinary skill in the art, on the premise of not paying creative work, go back Other accompanying drawings can be obtained according to these accompanying drawings.
Fig. 1 is a kind of circuit block diagram for temperature detection current that the utility model is provided.
Embodiment
Below in conjunction with the accompanying drawing in the utility model operation logic, the technical scheme in the utility model embodiment is entered Row is clearly and completely described, it is clear that described embodiment is only a part of embodiment of the utility model, rather than all Embodiment.Based on the embodiment in the utility model, those of ordinary skill in the art are not making creative work premise Lower obtained every other embodiment, belongs to the scope of the utility model protection.
Fig. 1 is refer to, a kind of temperature sensing circuit, the circuit includes:
First MCU module;
The power end being connected with one end of first MCU module(POWER);
The first NTC modules being connected with one end of first MCU module(NTC 1);
The first earth terminal being connected with the first NCT modules.
In one of the embodiments, the circuit also includes:
Resistance Ra, is connected with first MCU module;
Resistance Rb, is connected with first MCU module.
In one of the embodiments, the circuit also includes:
Second MCU module, its one end is connected with the resistance Rb, and the other end is connected with the first NTC modules.
In one of the embodiments, first MCU module and the second MCU module are built-in with an adc sampled points(Such as It is MCU_adc1, MCU_adc2 shown in Fig. 1).
The utility model provides a kind of temperature sensing circuit, and the circuit includes:First MCU module;With described first The power end of one end connection of MCU module(POWER);The first NTC modules being connected with one end of first MCU module(NTC 1);The first earth terminal being connected with the first NCT modules.When without fixed reference source, and it is forced to use reserve battery Either integrated level very high MCU is realized or is coordinated setting for the high costs such as MCU using constant reference reference source management IC Meter scheme, so that our utility models design a kind of scheme of the effective controllable wide temperature range detection of low cost to realize.
As shown in figure 1, it should be noted that wherein power voltage is variable, it is not necessary to constant voltage;Design When used according to actual, the protection point value corresponding first NTC tissue adjustment Ra of temperature resistance is fixed during Rb numerical value , it can be composed in parallel by one or more resistance string;First NTC resistance changes with the change of temperature, and MCU is only Need the V1 and V2 of the first sampled point of the first MCU module of reading and the second sampled point of the second MCU module, you can utilize following Formula calculate the resistance Rn of the first current NTC modules:Rn=Rb*V2/(V1-V2);After calculating obtains Rn value, so that it may To know corresponding temperature value.
This programme solves main in the market to carry out reality using reserve battery management IC or integrated level very high MCU Now detect, or use the design of constant reference reference source cooperation MCU high cost temperature detection.Especially solve at some In the conceptual design of unfixed a reference source, in the protection scheme of such as single lithium cell, we often directly from battery core just Negative pole power taking, its voltage is with the process of discharge and recharge, and constantly in change, fixed reference source is not available, cannot accurately enter Row collecting temperature.
In addition, the design of program low cost, practical, the component that design is selected all is common universal Element achieves that its function, shortens product development cycle, saving of purchase cost, in the product design of same type, the design Scheme has wide market prospects.
The inexpensive temperature detection scheme, is adapted to be used in the design of lithium electric protection scheme, especially single lithium electricity The protection of core uses upper, but not limited to this is used;All schemes for needing to use and detecting temperature are extended to, NTC1 is not only The NTC of negative temperature coefficient is only applicable, the PTC of positive temperature coefficient is also extended to upper.
The utility model operation logic is described in detail above, the explanation of above-mentioned operation logic is only intended to help Understand method of the present utility model and its core concept;Simultaneously for those of ordinary skill in the art, according to the utility model Thought, will change in specific embodiments and applications, in summary, this specification content should not be understood For to limitation of the present utility model.

Claims (1)

1. a kind of temperature sensing circuit, it is characterised in that described circuit includes:
First MCU module;
The power end being connected with one end of the first described MCU module;
The first NTC modules being connected with one end of the first described MCU module;
The first earth terminal being connected with the first described NTC modules;
Described circuit also includes:
Resistance Ra, is connected with the first described MCU module;
Resistance Rb, is connected with the first described MCU module;
Second MCU module, its one end is connected with described resistance Rb, and the other end is connected with the first NTC modules;
Described the first MCU module and the second MCU module is built-in with an adc sampled points.
CN201621134969.9U 2016-10-18 2016-10-18 A kind of temperature sensing circuit Active CN206378218U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201621134969.9U CN206378218U (en) 2016-10-18 2016-10-18 A kind of temperature sensing circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201621134969.9U CN206378218U (en) 2016-10-18 2016-10-18 A kind of temperature sensing circuit

Publications (1)

Publication Number Publication Date
CN206378218U true CN206378218U (en) 2017-08-04

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN201621134969.9U Active CN206378218U (en) 2016-10-18 2016-10-18 A kind of temperature sensing circuit

Country Status (1)

Country Link
CN (1) CN206378218U (en)

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