CN107623346A - Battery charging, charge/discharge control circuit - Google Patents
Battery charging, charge/discharge control circuit Download PDFInfo
- Publication number
- CN107623346A CN107623346A CN201710728691.0A CN201710728691A CN107623346A CN 107623346 A CN107623346 A CN 107623346A CN 201710728691 A CN201710728691 A CN 201710728691A CN 107623346 A CN107623346 A CN 107623346A
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- Prior art keywords
- circuit
- charging
- rechargeable battery
- management chip
- charge
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Abstract
A kind of battery charging, charge/discharge control circuit, including power supply, charging management chip and the on-off circuit being connected respectively with the charging management chip, rechargeable battery and temperature sensor, the first end of the on-off circuit is connected with the first output pin and vehicle electronic device of the charging management chip, the second end and the 3rd end of the on-off circuit are connected with the power supply and the rechargeable battery respectively, the input pin of charging management chip first is connected with the temperature sensor, the temperature information sent for receiving the temperature sensor, second input pin of the charging management chip is connected with the rechargeable battery, for receiving the input voltage of the rechargeable battery；When the power supply is powered, and environment temperature is in the first temperature range, the voltage of rechargeable battery is less than low voltage threshold, rechargeable battery is charged；When the power cut-off, and when the environment temperature is in the range of second temperature, rechargeable battery is discharged.
Description
Technical field
The present invention relates to cell art, more particularly to a kind of charging of battery, charge/discharge control circuit.
Background technology
With the development of science and technology automobile has been walking-replacing tool indispensable in people's lives.Typically in vehicle battery
After closing, for example, automatic navigator, on-board driving recorder etc. still needs work to some vehicle electronic devices, therefore at this
Installed in a little electronic equipments it is built-in can discharge and recharge reserve battery, after vehicle power supply is broken, supplied by built-in reserve battery
Electricity.Especially in recent years, Tachographs should be had standby rechargeable battery by laws and regulations requirement, when vehicle power-off, note
Record instrument will be powered by internal standby lithium pond.Working time degree enough recorders in standby lithium pond are alarmed or transmitted to Surveillance center
Necessary information.
But lithium battery industry battery operating temperature can not meet car rule level requirement, i.e. operating temperature range at present：-40
DEG C~125 DEG C, lithium cell charging temperature is 0 DEG C~45 DEG C, and discharge temp is -20 DEG C~+60 DEG C, due to its operating temperature range
It is relatively small, worked more than lithium battery outside defined temperature range, influence the life-span of lithium battery, while can exist certain
Potential safety hazard.
The content of the invention
In view of above-mentioned condition, it is necessary to which a kind of battery charging for controlling rechargeable battery operating temperature, control of discharge are provided
Circuit.
A kind of charging of battery, charge/discharge control circuit, including power supply, charging management chip and respectively with the Charge Management
On-off circuit, rechargeable battery and the temperature sensor of chip connection, the first end of the on-off circuit and the Charge Management
The first output pin and the vehicle electronic device connection of chip, the second end and the 3rd end of the on-off circuit respectively with it is described
Power supply is connected with the rechargeable battery, and the input pin of charging management chip first is connected with the temperature sensor, is used
In the temperature information for receiving the temperature sensor and sending, the second input pin of the charging management chip with it is described chargeable
Battery connects, for receiving the input voltage of the rechargeable battery；
When power supply power supply, and environment temperature is in the first temperature range, the voltage of rechargeable battery is less than low-voltage
During threshold value, the charging management chip exports the first control signal to the on-off circuit, to control the on-off circuit to turn on
The connection of the power supply and the rechargeable battery；
When the power cut-off, and when the environment temperature is in the range of second temperature, the charging management chip output
Second control signal is to the on-off circuit, to control the on-off circuit to turn on the rechargeable battery and the vehicle electronics
The connection of equipment.
The charging of above-mentioned battery, charge/discharge control circuit, wherein, the on-off circuit includes metal-oxide-semiconductor and in parallel with the metal-oxide-semiconductor
The first diode, the grid of the metal-oxide-semiconductor is connected with the first output pin of the charging management system and the vehicle mounted electric
Sub- equipment connection, source electrode and drain electrode are connected with the power supply and the rechargeable battery respectively, the input of first diode
The drain electrode with the triode and source electrode are connected respectively for end and output end.
Above-mentioned battery charging, charge/discharge control circuit, wherein, in addition to it is connected to the vehicle electronic device and the charging
Triode between managing chip, the base stage of the triode are connected with vehicle electronic device, collection base and the Charge Management core
The input pin of piece the 3rd connects, grounded emitter, and the vehicle electronic device includes MCU, and the MCU is used to set the charging
The temperature range parameter and voltage threshold parameter of managing chip.
Above-mentioned battery charging, charge/discharge control circuit, wherein, in addition to the protection circuit in parallel with the triode, it is described
Protection circuit includes first resistor and the electric capacity being connected in parallel, and the first resistor and electric capacity connect above-mentioned battery charging, electric discharge
Control circuit, wherein, in addition to the indicator light circuit being connected with the 4th output pin of the charging management chip, the instruction
Circuit for lamp is used to indicating the charged state of the rechargeable battery, including a light emitting diode and is connected with the light emitting diode
Grounding resistance.
Above-mentioned battery charging, charge/discharge control circuit, wherein, one second electricity is set between the power supply and the on-off circuit
Resistance, power supply described in one end of the second resistance are connected, and the other end is connected with the 4th input pin of the charging management chip
And the on-off circuit connection.
Above-mentioned battery charging, charge/discharge control circuit, wherein, it is also associated with second between the power supply and the second resistance
Diode.
Above-mentioned battery charging, charge/discharge control circuit, wherein, between the base stage of the triode and the vehicle electronic device
It is connected with 3rd resistor.
The embodiment of the present invention controls rechargeable battery to be charged under the first temperature range by charging management chip,
Discharged, effectively ensured under threshold temperature and threshold voltage under second temperature scope, rechargeable battery opens charge and discharge
Electricity Functional, prevent rechargeable battery operating temperature from being damaged when exceeding corresponding temperature range, extend the use of rechargeable battery
Life-span.
Brief description of the drawings
Fig. 1 is the battery charging in first embodiment of the invention, the circuit diagram of charge/discharge control circuit；
Fig. 2 is the battery charging in second embodiment of the invention, the circuit diagram of charge/discharge control circuit.
Main element symbol description
Embodiment
For the ease of understanding the present invention, the present invention is described more fully below with reference to relevant drawings.In accompanying drawing
Give the embodiment of the present invention.But the present invention can realize in many different forms, however it is not limited to described herein
Embodiment.On the contrary, the purpose for providing the embodiment is made to the disclosure more thorough and comprehensive.
It should be noted that when element is referred to as " being fixedly arranged on " another element, it can be directly on another element
Or there may also be element placed in the middle.When an element is considered as " connection " another element, it can be directly connected to
To another element or it may be simultaneously present centering elements.Term as used herein " vertical ", " horizontal ", " left side ",
" right side " and similar statement are for illustrative purposes only.
Unless otherwise defined, all of technologies and scientific terms used here by the article is with belonging to technical field of the invention
The implication that technical staff is generally understood that is identical.Term used in the description of the invention herein is intended merely to description tool
The purpose of the embodiment of body, it is not intended that in the limitation present invention.Term as used herein " and/or " include one or more phases
The arbitrary and all combination of the Listed Items of pass.
Referring to Fig. 1, it is the battery charging in first embodiment of the invention, charge/discharge control circuit, applied to vehicle electronics
In equipment, such as the electric power system of drive recorder, including power supply ACC, charging management chip 20 and respectively with the charging
On-off circuit 40, rechargeable battery 10 and the temperature sensor R5 of the connection of managing chip 20.The charging management chip 20 is used
It is described chargeable in the charging and discharging process that the rechargeable battery 10 is controlled according to default temperature range and voltage threshold
Battery 10 is, for example, lithium battery.
The first end of the on-off circuit 40 and the first output pin and vehicle electronics of the charging management chip 20
Equipment 30 connects, the second end and the 3rd end of the on-off circuit 40 respectively with the power supply ACC and the rechargeable battery 10
Connection.The input pin of charging management chip 20 first is connected with the temperature sensor R5, and the temperature sensor R5 is used
In the temperature of detection environment, and the temperature information of detection is sent to the charging management chip by first input pin
20, the second input pin of the charging management chip 20 is connected with the rechargeable battery 10, described chargeable for receiving
The input voltage of battery.
When power supply ACC power supplies, and environment temperature is in the first temperature range, the voltage of rechargeable battery is less than low electricity
When pressing threshold value, the charging management chip 20 exports the first control signal to the on-off circuit 40, to control the switch electricity
Road 40 turns on the power supply ACC and the rechargeable battery 10 connection.
When the power supply ACC is powered off, and the environment temperature is in the range of second temperature, the charging management chip 20
The second control signal is exported to the on-off circuit 40, to control the on-off circuit 40 to turn on the rechargeable battery 10 and institute
State the connection of vehicle electronic device 30.
First temperature range is the operating temperature of the charging process of the rechargeable battery, and second temperature scope is can
The operating temperature of the discharge process of rechargeable battery.Such as lithium battery, limiting can be charged in 0 DEG C~45 DEG C, and -20 DEG C of limitation~
It can be discharged in+60 DEG C.After power supply is effective, detect lithium battery temperature, if this temperature in the range of 0 DEG C~45 DEG C, together
When detect lithium battery current voltage value be less than lithium battery low voltage threshold a V when, by circuit control lithium battery start to fill
Electricity, the complete charge as high voltage threshold bV (generally 8.4V) of the voltage higher than lithium battery.
When vehicle power supply disconnects, the power supply of vehicle electronic device switchs to lithium battery power supply by vehicle power supply, works as temperature
Sensor detects lithium battery environment temperature in -20 DEG C~+60 DEG C setting ranges, and lithium battery can be discharged, until electric discharge
Voltage closes lithium battery when reaching given threshold c V.
The present embodiment controls rechargeable battery to be charged under the first temperature range by charging management chip, second
Discharged, effectively ensured under threshold temperature and threshold voltage under temperature range, rechargeable battery opens charge and discharge electric work
Can, prevent rechargeable battery operating temperature from being damaged when exceeding corresponding temperature range, extend the service life of rechargeable battery.
Referring to Fig. 2, for the battery charging in second embodiment of the invention, charge/discharge control circuit, including power supply ACC, fill
The electric managing chip 20 and on-off circuit 40 being connected respectively with the charging management chip 20, rechargeable battery 10 and temperature
Sensor R5.
The on-off circuit 40 includes metal-oxide-semiconductor KT1 and first the diode RD1, the MOS in parallel with the metal-oxide-semiconductor KT1
Pipe KT1 grid is connected with the first output pin CC of the charging management chip 20 and vehicle electronic device 30 connects, source
Pole and drain electrode are connected with the power supply ACC and the rechargeable battery 10 respectively.The input of the first diode RD1 and defeated
Going out end, the drain electrode with the metal-oxide-semiconductor KT1 and source electrode are connected respectively.
The input pin TS of charging management chip 20 first is connected with the temperature sensor R5, the temperature sensor
R5 is used for the temperature for detecting environment, and the temperature information of detection is sent to the charging valve by the first input pin TS
Chip 20 is managed, the second input pin BAT of the charging management chip 20 is connected with the rechargeable battery 10, for receiving
State the input voltage of rechargeable battery 10.
The battery charging, charge/discharge control circuit also include being connected to the vehicle electronic device 30 and the Charge Management
Triode KT2 between chip 20, the base stage of the triode KT2 are connected with vehicle electronic device 30, collection base and the charging valve
Manage the input pin COMP connections of chip the 3rd, grounded emitter.The vehicle electronic device 30 includes MCU and LCD display, institute
Temperature range and voltage threshold that MCU is used to set the charging management chip 20 are stated, the charging management chip 20 receives temperature
When spending the environment temperature of sensor detection, compare environment temperature and default temperature range and voltage threshold.The LCD display
For showing that lithium battery forces down warning message.
The protection in parallel with the triode KT2 is additionally provided between the triode KT2 and the vehicle electronic device 30
Circuit, the protection circuit include first resistor R6 and electric capacity C1 in parallel, and the first resistor R6 and electric capacity C1 are grounded.
Further, battery charging, charge/discharge control circuit also include with it is the 4th of the charging management chip 20 defeated
Go out the indicator light circuit connection of pin STAT connections, the indicator light circuit is used for the charging shape for indicating the rechargeable battery
State, including a light emitting diode DS1 and grounding resistance R4 that is connected with the light emitting diode DS1.
Further, a second resistance R1, the second resistance are set between the power supply ACC and the on-off circuit 40
Power supply ACC connections described in R1 one end, the other end are connected and described with the 4th input pin SNS of the charging management chip 20
On-off circuit 40 connects.Second resistance R1 plays a part of carrying out partial pressure, the SNS pins with charging management chip 20 to power supply
Connection connection, the SNS pins input for current sense.
Further, the second diode RD2 is also associated between the power supply ACC and the second resistance R1, is played whole
The effect of stream.
Further, it is connected with 3rd resistor R7 between the base stage of the triode KT2 and the vehicle electronic device 30.
Play to vehicle electronic device protective effect, in order to avoid electric current is excessive, damage vehicle electronic device.
When the power supply ACC of vehicle is effective, power supply ACC powers to vehicle electronic device 30, and vehicle electronic device 30 starts
Work.Now temperature sensor R5 detect rechargeable battery 10 temperature, if environment temperature the first temperature range (0 DEG C~
45 DEG C) in, and the control source of the rechargeable battery 10 of the detection of charging management chip 20 simultaneously is less than low voltage threshold a V, now,
There is the low alarm indication of the voltage of rechargeable battery 10, while the electric conduction of 20 driving switch circuit of charging management chip 40 in LCD screen
Source ACC and rechargeable battery 10 connection, charge to rechargeable battery 10, and charged state identification can be by Charge Management
The indicator light circuit luminance of the STAT pins output of chip 20, i.e. light emitting diode DS1 are bright；When voltage is higher than high voltage threshold
The complete charge of rechargeable battery 10 during value bV (Max 8.4V), light emitting diode DS1 go out.
When charging management chip 20 according to temperature sensor R5 detect environment temperature, judge that environment temperature exceeds the first temperature
During scope (0 DEG C~45 DEG C), the deenergization ACC of 20 controlling switch circuit of charging management chip 40 and rechargeable battery 10 company
Connect, rechargeable battery 10 is without charging, and now light emitting diode DS1 goes out.
When the power supply ACC of vehicle disconnects, rechargeable battery is powered to mobile unit.When environment temperature is in second temperature
In scope (- 20 DEG C~+60 DEG C), the CC pin driving switch circuit 40 of charging management chip 20 turns on rechargeable battery 10 and car
The connection of electronic equipment 30 is carried, rechargeable battery 10 is discharged, while exports letter by the STAT pins of charging management chip 20
Number go out to indicator light circuit, light emitting diode DS1, until the discharge threshold voltage threshold c V that electric discharge reaches setting stop electric discharge.
Lower secondary source ACC is effective, carries out repeated work, is automatically performed the charge/discharge operation of rechargeable battery, effectively carries out chargeable
The power management of battery, improve the security of vehicle electronic device, reliability and its intellectuality.
Embodiment described above only expresses embodiments of the present invention, and its description is more specific and detailed, but can not
Therefore it is interpreted as the limitation to the scope of the claims of the present invention.It should be pointed out that for the person of ordinary skill of the art,
Without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to the protection model of the present invention
Enclose.Therefore, the protection domain of patent of the present invention should be determined by the appended claims.
Claims (8)
1. a kind of charging of battery, charge/discharge control circuit, it is characterised in that including power supply, charging management chip and respectively with institute
State on-off circuit, rechargeable battery and the temperature sensor of charging management chip connection, the first end of the on-off circuit and institute
State the first output pin and the vehicle electronic device connection of charging management chip, the second end and the 3rd end of the on-off circuit
It is connected respectively with the power supply and the rechargeable battery, the input pin of charging management chip first and the TEMP
Device connects, the temperature information sent for receiving the temperature sensor, the second input pin of the charging management chip with
The rechargeable battery connection, for receiving the input voltage of the rechargeable battery；
When power supply power supply, and environment temperature is in the first temperature range, the voltage of rechargeable battery is less than low voltage threshold
When, the charging management chip exports the first control signal to the on-off circuit, to control described in the on-off circuit conducting
The connection of power supply and the rechargeable battery；
When the power cut-off, and when the environment temperature is in the range of second temperature, the charging management chip output second
Control signal is to the on-off circuit, to control the on-off circuit to turn on the rechargeable battery and the vehicle electronic device
Connection.
2. battery charging as claimed in claim 1, charge/discharge control circuit, it is characterised in that the on-off circuit includes metal-oxide-semiconductor
First diode in parallel with the metal-oxide-semiconductor, the first output pin of the grid of the metal-oxide-semiconductor and the charging management system
Connection is connected with the vehicle electronic device, and source electrode and drain electrode are connected with the power supply and the rechargeable battery respectively, described
The drain electrode with the triode and source electrode are connected the input and output end of first diode respectively.
3. battery charging as claimed in claim 1, charge/discharge control circuit, it is characterised in that also described vehicle-mounted including being connected to
Triode between electronic equipment and the charging management chip, the base stage of the triode are connected with vehicle electronic device, collection
Base is connected with the input pin of charging management chip the 3rd, grounded emitter, and the vehicle electronic device includes MCU, described
MCU is used for the temperature range parameter and voltage threshold parameter for setting the charging management chip.
4. battery charging as claimed in claim 3, charge/discharge control circuit, it is characterised in that also include with the triode simultaneously
The protection circuit of connection, the protection circuit includes the first resistor being connected in parallel and electric capacity, the first resistor and electric capacity connect
Ground.
5. battery charging as claimed in claim 1, charge/discharge control circuit, it is characterised in that also include and the Charge Management
The indicator light circuit of the 4th output pin connection of chip, the indicator light circuit are used for the charging for indicating the rechargeable battery
State, including a light emitting diode and the grounding resistance that is connected with the light emitting diode.
6. battery charging as claimed in claim 1, charge/discharge control circuit, it is characterised in that the power supply and the switch electricity
One second resistance is set between road, and power supply described in one end of the second resistance connects, the other end and the charging management chip
The 4th input pin connection and the on-off circuit connection.
7. battery charging as claimed in claim 1, charge/discharge control circuit, it is characterised in that the power supply and the described second electricity
The second diode is also associated between resistance.
8. battery charging as claimed in claim 3, charge/discharge control circuit, it is characterised in that the base stage of the triode and institute
State and be connected with 3rd resistor between vehicle electronic device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710728691.0A CN107623346A (en) | 2017-08-23 | 2017-08-23 | Battery charging, charge/discharge control circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710728691.0A CN107623346A (en) | 2017-08-23 | 2017-08-23 | Battery charging, charge/discharge control circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107623346A true CN107623346A (en) | 2018-01-23 |
Family
ID=61089100
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710728691.0A Pending CN107623346A (en) | 2017-08-23 | 2017-08-23 | Battery charging, charge/discharge control circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107623346A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109713750A (en) * | 2018-12-30 | 2019-05-03 | 深圳飞安瑞科技股份有限公司 | A kind of adjustable charge-discharge battery protection circuit of temperature |
| CN111725881A (en) * | 2019-03-19 | 2020-09-29 | 比亚迪股份有限公司 | Power supply system |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201388067Y (en) * | 2009-02-18 | 2010-01-20 | 王开全 | Multifunctional USB charging seat |
| CN102570403A (en) * | 2010-12-28 | 2012-07-11 | 宁波良业电器有限公司 | Temperature protection circuit for lithium ion battery charging and discharging |
| CN103346614A (en) * | 2013-08-02 | 2013-10-09 | 合肥博微田村电气有限公司 | Power supply applied to automobile |
-
2017
- 2017-08-23 CN CN201710728691.0A patent/CN107623346A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201388067Y (en) * | 2009-02-18 | 2010-01-20 | 王开全 | Multifunctional USB charging seat |
| CN102570403A (en) * | 2010-12-28 | 2012-07-11 | 宁波良业电器有限公司 | Temperature protection circuit for lithium ion battery charging and discharging |
| CN103346614A (en) * | 2013-08-02 | 2013-10-09 | 合肥博微田村电气有限公司 | Power supply applied to automobile |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109713750A (en) * | 2018-12-30 | 2019-05-03 | 深圳飞安瑞科技股份有限公司 | A kind of adjustable charge-discharge battery protection circuit of temperature |
| CN111725881A (en) * | 2019-03-19 | 2020-09-29 | 比亚迪股份有限公司 | Power supply system |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| TA01 | Transfer of patent application right | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20201124 Address after: 330001 No. 509 North Avenue, Yingbin Road, Jiangxi, Nanchang Applicant after: JIANGLING MOTORS Co.,Ltd. Address before: 330001 No. 509 North Avenue, Yingbin Road, Jiangxi, Nanchang Applicant before: JIANGLING MOTORS Co.,Ltd. Applicant before: JMC HEAVY DUTY VEHICLE Co.,Ltd. |
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| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20180123 |