CN105738812A - Apparatus and method for detecting charge and discharge currents of battery - Google Patents
Apparatus and method for detecting charge and discharge currents of battery Download PDFInfo
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- CN105738812A CN105738812A CN201410758876.2A CN201410758876A CN105738812A CN 105738812 A CN105738812 A CN 105738812A CN 201410758876 A CN201410758876 A CN 201410758876A CN 105738812 A CN105738812 A CN 105738812A
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Abstract
The invention provides an apparatus and method for detecting charge and discharge currents of a battery The apparatus comprises a charger, a power management unit, the battery and a first resistor, wherein the charger is connected with the battery through the first resistor, and the power management unit is connected with the battery through the first resistor. The amplitude of charge currents of the battery is obtained by detecting voltages at the two ends of the first resistor through the charge current induction pin of the charger and the voltage and current induction pin of the battery, and the amplitude of discharge currents of the battery is obtained by detecting voltages at the two ends of the first resistor through the discharge current inverting input detection pin and the discharge current non-inverting input detection pin of the power management unit. By use of the method and apparatus provided by the invention, a new circuit is provided for detecting the charge/discharge currents of the battery, and the hardware cost is decreased.
Description
Technical field
The present invention relates to a kind of device and method detecting battery charging and discharging electric current.
Background technology
The principle of the charge/discharge current detecting battery of mobile phone at present is, the voltage at the first resistance two ends that detecting is connected between charger and battery is to detect the charging current of battery, and the voltage at the second resistance two ends that detecting is connected between Power Management Unit (PMU) and battery is to detect the discharge current of battery.The mode of the charge/discharge current of this kind of detecting battery of mobile phone can meet functional design demand, however it is necessary that and uses two precision resistances, and namely the first resistance and the second resistance, add cost.
Summary of the invention
In view of the foregoing, it is necessary to provide a kind of device detecting battery charging and discharging electric current, the charge/discharge current for detecting battery provides a kind of new circuit, has saved hardware cost.
Additionally, there is a need to provide a kind of method detecting battery charging and discharging electric current.
A kind of device detecting battery charging and discharging electric current, including charger, Power Management Unit, battery and the first resistance, this charger is connected with battery by the first resistance, and this Power Management Unit is connected with battery by the first resistance.
A kind of method detecting battery charging and discharging electric current, the method includes, it is provided that one first resistance, and charger is connected with described battery by described first resistance, and Power Management Unit is connected with battery by described first resistance；The charging current sensing pin of described charger and cell voltage sense pin with electric current and are connected with the two ends of the first resistance respectively；When battery operated in charged state time, sense pin and cell voltage by the charging current of described charger and electric current sensing pin detect the size that the first resistance both end voltage obtains the charging current of battery；The discharge current end of oppisite phase input detection pin of described Power Management Unit is connected with the two ends of the first resistance respectively with discharge current positive terminal input detection pin；When battery operated in discharge electricity condition time, input detection pin by the discharge current end of oppisite phase of described Power Management Unit and discharge current positive terminal input detection pin detect the size that the first resistance both end voltage obtains the discharge current of battery.
Compared to prior art, the device and method of detecting battery charging and discharging electric current provided by the invention, improve the circuit of battery charging and discharging current sense, reduce hardware cost.
Accompanying drawing explanation
Fig. 1 is the principle of device block diagram of the detecting battery charging and discharging electric current of better embodiment of the present invention.
Fig. 2 be better embodiment of the present invention detecting battery charging and discharging electric current method in current direction schematic diagram
Main element symbol description
| The device of detecting battery charging and discharging electric current | 1 |
| Charger | 10 |
| VBAT pin | 101 |
| GND pin | 102、121 |
| CSIN pin | 103 |
| CSOUT pin | 104 |
| Battery | 11 |
| BAT-negative pin | 110 |
| BAT+ positive pole pin | 111 |
| Power Management Unit | 12 |
| SYS pin | 120 |
| CSSN pin | 123 |
| CSSP pin | 124 |
| First resistance | 13 |
Following detailed description of the invention will further illustrate the present invention in conjunction with above-mentioned accompanying drawing.
Detailed description of the invention
Consult shown in Fig. 1, be a kind of device detecting battery charging and discharging electric current of present pre-ferred embodiments offer.The device 1 of this detecting battery charging and discharging electric current includes charger 10, battery 11, Power Management Unit 12 and the first resistance 13.Described charger 10 includes VBAT pin 101, GND pin 102, CSIN pin 103 and CSOUT pin 104.Described VBAT pin 101 is voltage input pin；Described GND pin 102 is grounding pin, and described CSIN pin 103 is charging current sensing pin, and described CSOUT pin 104 is cell voltage and electric current sensing pin；Described CSIN pin 103 and CSOUT pin 104 connect the two ends of the first resistance 13 respectively, constitute a feedback circuit of charging current.Inside chip in described charger 10 calculates charging current by detecting the voltage between described CSIN pin 103 and CSOUT pin 104.Described Power Management Unit 12 includes SYS pin 120, GND pin 121, CSSN pin 123 and CSSP pin 124, described SYS pin 120 is system copies command pin, described GND pin 121 is grounding pin, described CSSN pin 123 is discharge current end of oppisite phase input detection pin, and described CSSP pin 124 is discharge current positive terminal input detection pin；Described CSSN pin 123 and CSSP pin 124 connect the two ends of the first resistance 13 respectively, constitute a feedback circuit of battery 11 discharge current.Described Power Management Unit 12 calculates discharge current by detecting the voltage between described CSSN pin 123 and CSSP pin 124.Described battery 11 includes BAT-negative pin 110 and BAT+ positive pole pin 111.
The GND pin 102 of described charger 10 is connected with the BAT-negative pin 110 of battery 11, described VBAT pin 101 is connected with the BAT+ positive pole pin 111 of battery 11 by the first resistance 13, and described CSIN pin 103 and CSOUT pin 104 connect the two ends of the first resistance 13 respectively；The SYS pin 120 of described Power Management Unit 12 is connected with the VBAT pin 101 of charger 10, the GND pin 121 of described Power Management Unit 12 is connected with the GND pin 102 of charger 10, described CSSN pin 123 and CSSP pin 124 connect the two ends of the first resistance 13 respectively, described CSIN pin 103 is connected one end of the first resistance 13 with CSSN pin 123, and described CSOUT pin 104 is connected the other end of described first resistance 13 with CSSP pin 124.
In the present embodiment, the device 1 of this detecting battery charging and discharging electric current is for detecting the charge/discharge current of battery 11.Described battery 11 has charged state, discharge condition and also not three kinds of states of discharge condition of not charging.Described not discharge condition of not charging also is the idle state of battery 11.The device 1 of described detecting battery charging and discharging electric current utilizes the first resistance 13 to form two different current paths under the charged state and discharge condition of battery 11 respectively, it is achieved accurately detect the charging current of battery 11 and the size of discharge current.
Specifically, when this battery 11 works in charged state, described charger 10 is connected by the circuit between VBAT pin 101 and the BAT+ positive pole pin 111 of battery 11 and provides current to battery 11, is also associated with the first resistance 13 between the BAT+ positive pole pin 111 of described VBAT pin 101 and battery 11.The CSIN pin 103 of charger 10 and CSOUT pin 104 are connected to the two ends of the first resistance 13 and form a feedback circuit of charging current, the flow direction of charging current as shown in Figure 2.The device 1 of this detecting battery charging and discharging electric current detects, by described CSIN pin 103 and CSOUT pin 104, the size that the first resistance 13 both end voltage can obtain the charging current of battery 11.Described first resistance 13 is arranged away from charger 10 near battery 11.
When this battery 11 works in discharge condition, the discharge current of battery 11 flows through the SYS pin 120 of the first resistance 13 to Power Management Unit 12 from BAT+ positive pole pin 111.The CSSN pin 123 of Power Management Unit 12 and CSSP pin 124 are connected to the two ends of the first resistance 13 and form a feedback circuit of discharge current, the flow direction of discharge current as shown in Figure 2.The device 1 of this detecting battery charging and discharging electric current detects, by described CSSN pin 123 and CSSP pin 124, the size that the first resistance 13 both end voltage can obtain the discharge current of battery 11.
The device 1 of described detecting battery charging and discharging electric current calculates the size of the charging current of battery 11 by the voltage on the feedback circuit of formation between CSIN pin 103 and CSOUT pin 104 and first resistance 13 of detecting charger 10；And the size of the discharge current of battery 11 is calculated by the voltage on the feedback circuit of formation between CSSN pin 123 and CSSP pin 124 and first resistance 13 of detecting Power Management Unit 12.Charge/discharge current for detecting battery 11 provides a kind of new circuit, has saved hardware cost.
It should be noted last that, above example is only in order to illustrate technical scheme and unrestricted, although the present invention being described in detail with reference to above preferred embodiment, it will be understood by those within the art that, technical scheme can be modified or equivalent replacement, without deviating from the spirit and scope of technical solution of the present invention.
Claims (8)
1. the device detecting battery charging and discharging electric current, it is characterized in that, the device of described detecting battery charging and discharging electric current includes charger, Power Management Unit, battery and the first resistance, this charger is connected with battery by described first resistance, and this Power Management Unit is connected with battery by described first resistance.
2. the device detecting battery charging and discharging electric current as claimed in claim 1, it is characterized in that, described charger includes charging current sensing pin and cell voltage and electric current sensing pin, this charging current sensing pin and cell voltage sense pin with electric current and be connected with the two ends of the first resistance respectively.
3. the device detecting battery charging and discharging electric current as claimed in claim 1, it is characterized in that, described Power Management Unit includes discharge current end of oppisite phase input detection pin and discharge current positive terminal input detection pin, and this discharge current end of oppisite phase input detection pin is connected with the two ends of the first resistance respectively with discharge current positive terminal input detection pin.
4. the device detecting battery charging and discharging electric current as claimed in claim 2, it is characterized in that, when battery operated in charged state time, one feedback circuit of the charging current sensing pin of described charger and cell voltage and electric current sensing pin and the first resistance formation charging current, senses pin and cell voltage by described charging current and electric current sensing pin detects the size that the first resistance both end voltage obtains the charging current of battery.
5. the device detecting battery charging and discharging electric current as claimed in claim 3, it is characterized in that, when battery operated in discharge electricity condition time, the discharge current end of oppisite phase input detection pin of described Power Management Unit and discharge current positive terminal input detection pin and the first resistance form a feedback circuit of discharge current, detect, by described discharge current end of oppisite phase input detection pin and discharge current positive terminal input detection pin, the size that the first resistance both end voltage obtains the discharge current of battery.
6. the method detecting battery charging and discharging electric current, it is characterised in that
Thering is provided one first resistance, charger is connected with described battery by described first resistance, and Power Management Unit is connected with battery by described first resistance；
The charging current sensing pin of described charger and cell voltage sense pin with electric current and are connected with the two ends of the first resistance respectively；
When battery operated in charged state time, sense pin and cell voltage by the charging current of described charger and electric current sensing pin detect the size that the first resistance both end voltage obtains the charging current of battery；
The discharge current end of oppisite phase input detection pin of described Power Management Unit is connected with the two ends of the first resistance respectively with discharge current positive terminal input detection pin；
When battery operated in discharge electricity condition time, input detection pin by the discharge current end of oppisite phase of described Power Management Unit and discharge current positive terminal input detection pin detect the size that the first resistance both end voltage obtains the discharge current of battery.
7. the method detecting battery charging and discharging electric current as claimed in claim 6, it is characterized in that, when battery operated in charged state time, a feedback circuit of the charging current sensing pin of described charger and cell voltage and electric current sensing pin and the first resistance formation charging current.
8. the method detecting battery charging and discharging electric current as claimed in claim 6, it is characterized in that, when battery operated in discharge electricity condition time, the discharge current end of oppisite phase input detection pin of described Power Management Unit and a feedback circuit of discharge current positive terminal input detection pin and the first resistance formation discharge current.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410758876.2A CN105738812A (en) | 2014-12-10 | 2014-12-10 | Apparatus and method for detecting charge and discharge currents of battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410758876.2A CN105738812A (en) | 2014-12-10 | 2014-12-10 | Apparatus and method for detecting charge and discharge currents of battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105738812A true CN105738812A (en) | 2016-07-06 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410758876.2A Pending CN105738812A (en) | 2014-12-10 | 2014-12-10 | Apparatus and method for detecting charge and discharge currents of battery |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106707001A (en) * | 2017-03-23 | 2017-05-24 | 上海与德科技有限公司 | Current detection circuit and method |
| CN108957348A (en) * | 2018-08-16 | 2018-12-07 | 厦门芯阳科技股份有限公司 | A kind of battery capacity evaluation method of low cost |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106707001A (en) * | 2017-03-23 | 2017-05-24 | 上海与德科技有限公司 | Current detection circuit and method |
| CN108957348A (en) * | 2018-08-16 | 2018-12-07 | 厦门芯阳科技股份有限公司 | A kind of battery capacity evaluation method of low cost |
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Application publication date: 20160706 |