CN104300507A - Lithium battery guard plate circuit based on NTC patch thermistor elements - Google Patents
Lithium battery guard plate circuit based on NTC patch thermistor elements Download PDFInfo
- Publication number
- CN104300507A CN104300507A CN201410597247.6A CN201410597247A CN104300507A CN 104300507 A CN104300507 A CN 104300507A CN 201410597247 A CN201410597247 A CN 201410597247A CN 104300507 A CN104300507 A CN 104300507A
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- China
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- ntc
- lithium battery
- thermistor
- circuit based
- paster
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Abstract
The invention discloses a lithium battery guard plate circuit based on NTC patch thermistor elements. The lithium battery guard plate circuit comprises a charging loop and a discharging loop and further comprises a BQ20Z75 type control chip, multiple resistor-capacitor units, multiple MOSFET switching devices and a PTC thermistor. The BQ20Z75 type control chip detects battery voltages and loop currents through the resistor-capacitor units and controls the charging loop and the discharging loop to be closed and opened through the MOSFET switching devices, the PTC thermistor is connected between the resistor-capacitor units and a battery in series, and an NTC patch is adopted in the PTC thermistor. According to the lithium battery guard plate circuit based on the NTC patch thermistor elements, a patch NTC thermistor is used for replacing a plug-in type NTC thermistor, and production and processing work hours can be reduced; displacement of plug-in type NTC thermistor contacts is reduced and eliminated; short circuits are reduced and eliminated; displacement and breakage are reduced and eliminated; the man-made damage probability is decreased.
Description
Technical field
The present invention relates to a kind of lithium battery circuit, particularly relate to a kind of lithium battery protection board circuit based on NTC paster thermistor element.
Background technology
SMT paster refers to the abbreviation carrying out the series of processes flow process of processing on pcb basis, and SMT is surface installation technique (surface mounting technology), is most popular a kind of technology and technique in current Electronic Assemblies industry.Electronic circuit surface installation technique, is called surface mount or surface mounting technology.It is that one (will be called for short SMC/SMD without pin or short leg surface-assembled components and parts, Chinese claims sheet components and parts) be arranged on printed circuit board (on the surface of surface or other substrate, by the circuit load technology of the method such as reflow welding or immersed solder in addition welding assembly.
Our electronic product is all add various electric capacity by pcb under normal conditions, and the electronic devices and components such as resistance are by the electric circuit diagram design of design, so panoramic electrical equipment needs various different smt paster processing technology to process.
------> divides plate to the attachment of > part to SMT basic technology inscape: paste solder printing in >AOI optical detection--> maintenance--in > reflow soldering.
The advantage of SMT paster processing: packaging density is high, electronic product volume is little, lightweight, the volume and weight of surface mount elements only has about 1/10 of traditional inserting element, after general employing SMT, electronic product volume-diminished 40% ~ 60%, weight saving 60% ~ 80%.Reliability is high, vibration resistance is strong.Welding point defect rate is low.High frequency characteristics is good.Decrease electromagnetism and radio frequency interference.Easily be automated, enhance productivity.Reduce costs and reach 30% ~ 50%.Save material, the energy, equipment, manpower, time etc.
Just because of the complexity of the technological process of smt paster processing, so there is the factory that a lot of smt pasters is processed, specialty has done the processing of smt paster, in Shenzhen, has benefited from the flourish of electron trade, and smt paster has just been processed into the prosperity of an industry.
In the conventional technology, PACK intelligent power Management IC temperature detection sensor NTC thermistor is manual card formula, and then thermistor contact is attached in battery core by human weld, finally fixes with heat-conducting glue.Such design is popular at present, if but be used in NTC paster lithium battery protection board circuit can be made to have more advantage when physical dimension meets.
Summary of the invention
The object of the invention is to provide a kind of lithium battery protection board circuit based on NTC paster thermistor element to solve the problem.
The present invention is achieved by the following technical solutions:
A kind of lithium battery protection board circuit based on NTC paster thermistor element, comprise charge circuit and discharge loop, also comprise BQ20Z75 type control chip, multiple Resistor-Capacitor Unit, multiple switch mosfet device and PTC thermistor, described BQ20Z75 type control chip detects cell voltage and loop current by multiple described Resistor-Capacitor Unit, and conducting and the shutoff of described charge circuit and described discharge loop is controlled by multiple described switch mosfet device, described PTC thermistor is series between multiple described capacitance resistance ware and battery, described PTC thermistor adopts NTC paster.
Particularly, multiple described capacitance resistance ware comprises 30 resistance and 23 electric capacity.
Further, described switch mosfet device is four.
Further, described lithium battery protection board circuit also comprises four diodes, two voltage stabilizing didoes, fuse and potentiometers.
The invention has the beneficial effects as follows:
The present invention is a kind of lithium battery protection board circuit based on NTC paster thermistor element, substitutes plug-in type NTC thermistor create following advantage by paster NTC thermistor:
1, production and processing man-hour is saved;
2, reduce or remit plug-in type NTC thermistor contact and occur displacement;
3, there is line short in deduction and exemption;
4, there is displacement and fracture in deduction and exemption, reduces artificial damage probability.
Accompanying drawing explanation
Fig. 1 is the circuit diagram of the lithium battery protection board circuit that the present invention is based on NTC paster thermistor element.
Embodiment
Below in conjunction with drawings and the specific embodiments, the present invention is described in further detail:
As shown in Figure 1, the present invention is a kind of lithium battery protection board circuit based on NTC paster thermistor element, comprise charge circuit and discharge loop, also comprise BQ20Z75 type control chip, multiple Resistor-Capacitor Unit, multiple switch mosfet device and PTC thermistor, described BQ20Z75 type control chip detects cell voltage and loop current by multiple described Resistor-Capacitor Unit, and conducting and the shutoff of described charge circuit and described discharge loop is controlled by multiple described switch mosfet device, described PTC thermistor is series between multiple described capacitance resistance ware and battery, described PTC thermistor adopts NTC paster.Multiple described capacitance resistance ware comprises 30 resistance and 23 electric capacity.Described switch mosfet device is four.Described lithium battery protection board circuit also comprises four diodes, two voltage stabilizing didoes, fuse and potentiometers.
Use paster NTC thermistor can realize direct SMT paster, simple traditional human weld, thus shorten the machining period of the manufacturing.Avoid plug-in type NTC thermistor contact to occur displacement, as NTC thermistor contact is displaced on heater members or surrounding, thus make managing electric quantity IC detected temperatures occur relatively large deviation, serious appearance mistake.Avoid occurring line short, as NTC thermistor supplied materials or add and occur damaged naked copper man-hour, be easy to like this be connected with some shorted devices on pcb board, be easy to like this damage pcb board or battery core, serious words have accident potential.Avoid NTC to occur fracture, as NTC thermistor supplied materials or add and occur fracture man-hour, thus cause managing electric quantity IC temperature detection error.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., be all included within protection scope of the present invention.
Claims (4)
1. the lithium battery protection board circuit based on NTC paster thermistor element, comprise charge circuit and discharge loop, it is characterized in that: also comprise BQ20Z75 type control chip, multiple Resistor-Capacitor Unit, multiple switch mosfet device and PTC thermistor, described BQ20Z75 type control chip detects cell voltage and loop current by multiple described Resistor-Capacitor Unit, and conducting and the shutoff of described charge circuit and described discharge loop is controlled by multiple described switch mosfet device, described PTC thermistor is series between multiple described capacitance resistance ware and battery, described PTC thermistor adopts NTC paster.
2. the lithium battery protection board circuit based on NTC paster thermistor element according to claim 1, is characterized in that: multiple described capacitance resistance ware comprises 30 resistance and 23 electric capacity.
3. the lithium battery protection board circuit based on NTC paster thermistor element according to claim 1, is characterized in that: described switch mosfet device is four.
4. the lithium battery protection board circuit based on NTC paster thermistor element according to claim 1, is characterized in that: described lithium battery protection board circuit also comprises four diodes, two voltage stabilizing didoes, fuse and potentiometers.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410597247.6A CN104300507A (en) | 2014-10-30 | 2014-10-30 | Lithium battery guard plate circuit based on NTC patch thermistor elements |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410597247.6A CN104300507A (en) | 2014-10-30 | 2014-10-30 | Lithium battery guard plate circuit based on NTC patch thermistor elements |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104300507A true CN104300507A (en) | 2015-01-21 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410597247.6A Pending CN104300507A (en) | 2014-10-30 | 2014-10-30 | Lithium battery guard plate circuit based on NTC patch thermistor elements |
Country Status (1)
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| CN (1) | CN104300507A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104362597A (en) * | 2014-11-20 | 2015-02-18 | 成都群侠科技有限公司 | Lithium battery protection panel circuit based on NTC surface-mounted device thermistor elements |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5576612A (en) * | 1995-01-23 | 1996-11-19 | Motorola, Inc. | Ultrafast rechargeable battery pack and method of charging same |
| CN201667547U (en) * | 2010-02-02 | 2010-12-08 | 上海长园维安电子线路保护股份有限公司 | Lithium battery protection module with embedded programmable switch type charging function |
| CN203951172U (en) * | 2014-05-30 | 2014-11-19 | 福建万众百源实业有限公司 | Lithium battery protection board circuit based on NTC paster thermistor element |
| CN204243733U (en) * | 2014-10-30 | 2015-04-01 | 成都艾塔科技有限公司 | Based on the lithium battery protection board circuit of NTC paster thermistor element |
-
2014
- 2014-10-30 CN CN201410597247.6A patent/CN104300507A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5576612A (en) * | 1995-01-23 | 1996-11-19 | Motorola, Inc. | Ultrafast rechargeable battery pack and method of charging same |
| CN201667547U (en) * | 2010-02-02 | 2010-12-08 | 上海长园维安电子线路保护股份有限公司 | Lithium battery protection module with embedded programmable switch type charging function |
| CN203951172U (en) * | 2014-05-30 | 2014-11-19 | 福建万众百源实业有限公司 | Lithium battery protection board circuit based on NTC paster thermistor element |
| CN204243733U (en) * | 2014-10-30 | 2015-04-01 | 成都艾塔科技有限公司 | Based on the lithium battery protection board circuit of NTC paster thermistor element |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104362597A (en) * | 2014-11-20 | 2015-02-18 | 成都群侠科技有限公司 | Lithium battery protection panel circuit based on NTC surface-mounted device thermistor elements |
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Application publication date: 20150121 |
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| WD01 | Invention patent application deemed withdrawn after publication |