CN204886320U - Power management system - Google Patents
Power management system Download PDFInfo
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- CN204886320U CN204886320U CN201520652228.9U CN201520652228U CN204886320U CN 204886320 U CN204886320 U CN 204886320U CN 201520652228 U CN201520652228 U CN 201520652228U CN 204886320 U CN204886320 U CN 204886320U
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Abstract
The utility model discloses a power management system is applied to the lithium cell, charge a module and a protective film piece including interconnect, the protective film piece with the lithium cell forms a protection return circuit, the protective film piece is through right the protection return circuit is detected, makes the module of charging can be right the lithium cell carries out safety and charges. The utility model discloses a power management system can avoid the power management system's among the prior art circuit structure complicated and with high costs and lead to the limited problem of range of application.
Description
Technical field
The utility model relates to technical field of lithium batteries, particularly a kind of power-supply management system.
Background technology
Existing power-supply management system is owing to mostly needing to communicate with slave computer, and circuit structure is comparatively complicated, and cost is also relatively high, and therefore, the usual external power consumption of existing power-supply management system reaches tens even the high power load equipment of hundreds of microampere order.If the small area analysis load equipment that itself and power consumption will be only units microampere order is connected, is both limited to the volume of small area analysis load equipment, the service precision of small area analysis load equipment also can be caused to be affected.
Based on this, be necessary to be improved existing power-supply management system, to expand its range of application, meet the need of market better.
Utility model content
The purpose of this utility model is to provide a kind of power-supply management system, and the circuit structure for solving power-supply management system of the prior art is complicated and cost is high and cause the problem that is of limited application.
In order to solve the problems of the technologies described above, the utility model provides following technical scheme:
A kind of power-supply management system; be applied to lithium battery; comprise an interconnective charging module and a protection module; described protection module and described lithium battery form a protective loop; described protection module, by detecting described protective loop, makes described charging module can carry out safe charging to described lithium battery.
Further, described protection module comprises a voltage detecting circuit, for detecting the magnitude of voltage of described lithium battery, with when detecting that the magnitude of voltage of described lithium battery exceedes preset voltage value scope, disconnects described protective loop.
Further, described preset voltage value scope is 2.5V – 4.3V.
Further, described protection module comprises a current detection circuit, for detecting the output current value of described protective loop, with when detecting that the output current value of described protective loop exceedes pre-set current value, disconnects described protective loop.
Further, described pre-set current value is 150mA.
Further, described charging module comprises a charging current regulating circuit, for the charging current regulating described charging module to export; When described lithium battery charges, described charging current is adjusted to the first preset value; When described lithium cell charging completes, described charging current is adjusted to the second preset value, stops charging to described lithium battery to make described charging module; When described charging module stops charging to described lithium battery, described charging current is adjusted to the 3rd preset value.
Further, described second preset value is 1/10th of described first preset value, and described 3rd preset value is less than described second preset value.
Further, described charging module comprises a charging instruction port and charging complete instruction port, and whether described charging instruction port is used to indicate described lithium battery and charges; Described charging complete instruction port is used to indicate described lithium battery and whether completes charging.
Further, during the external power supply of described charging module, described protective loop is charge circuit; During the external load of described protection module, described protective loop is discharge loop.
Further, described power-supply management system, also comprises a regulating filtering module, carries out voltage regulation filtering for the supply voltage exported described discharge loop, to provide the supply voltage after voltage regulation filtering to described load.
Compared with prior art, the utility model has following beneficial effect:
By arranging the protection module that is connected to charging module; protection module and lithium battery is made to form a protective loop; and by detecting protective loop; make charging module can carry out safe charging to lithium battery; be not only lithium battery and provide comprehensive protection; and circuit structure is simple and cost is low, can be connected with small area analysis load equipment, avoid the circuit structure complexity of power-supply management system of the prior art and cost is high and cause the problem that is of limited application.
Accompanying drawing explanation
Fig. 1 is the structured flowchart of the power-supply management system of an embodiment.
Fig. 2 is the structured flowchart of the power-supply management system of another embodiment.
Embodiment
Below in conjunction with accompanying drawing, the technical scheme in each embodiment of the present utility model is elaborated further.
Refer to Fig. 1 to Fig. 2, in one embodiment, a kind of power-supply management system 100 can be applicable to lithium battery 200.This lithium battery 200 can form by multisection lithium battery is monomer series-connected, also can be composed in parallel by multisection lithium battery.
This power-supply management system 100 comprises interconnective charging module 10 and a protection module 20.Wherein, protection module 20 and lithium battery 200 form a protective loop 21, and protection module 20, by detecting protective loop 21, makes charging module 10 can carry out safe charging to lithium battery 200.
Further, protection module 20 comprises a voltage detecting circuit 22, for detecting the magnitude of voltage of lithium battery 200, with when detecting that the magnitude of voltage of lithium battery 200 exceedes preset voltage value scope, disconnects protective loop 21.
Preferably, preset voltage value scope is 2.5V – 4.3V.
In the present embodiment, when the magnitude of voltage of lithium battery 200 is higher than 4.3V, protection module 20, by starting protection, disconnects protective loop 21, makes the output voltage values of protection module 20 be reduced to 0V, to realize the overvoltage protection to lithium battery 200.
When the magnitude of voltage of lithium battery 200 is lower than 2.5V, protection module 20, also by starting protection, disconnects protective loop 21, makes the output voltage values of protection module 20 be reduced to 0V, to realize the under-voltage protection to lithium battery 200.
When the magnitude of voltage of lithium battery 200 returns to overvoltage release voltage value 4.1V or under-voltage release voltage value 3.1V, recovery and protection loop 21.
Further, protection module 20 comprises a current detection circuit 23, for detecting the output current value of protective loop 21, with when detecting that the output current value of protective loop 21 exceedes pre-set current value, disconnects protective loop.
Preferably, pre-set current value is 150mA.
In the present embodiment, when the output current value of protective loop 21 is more than 150mA, protection module 20, by starting protection, disconnects protective loop 21, makes the output current value of protective loop 21 be reduced to 0mA, to realize the overcurrent protection to lithium battery 200.
As previously mentioned; by arranging the protection module 20 that is connected to charging module 10; protection module 20 and lithium battery 200 is made to form a protective loop 21; and the detection by carrying out protective loop 21; protective loop 21 is disconnected in the situations such as lithium battery 200 overvoltage, under-voltage, overcurrent, short circuit; make charging module 10 can carry out safe charging to lithium battery 200, serve the effect of general protection lithium battery 200.
In addition, this power-supply management system 100, by arranging interconnective charging module 10 and protection module 20, such that the circuit structure of power-supply management system 100 is simple and cost is low, is conducive to realizing and the docking of small area analysis load equipment.
As shown in Figure 2, charging module 10 comprises a charging current regulating circuit 11, for the charging current regulating charging module 10 to export.
When lithium battery 200 charges, charging current is adjusted to the first preset value.When lithium battery 200 charging complete, charging current is adjusted to the second preset value, stops charging to lithium battery 200 to make charging module 10.When charging module 10 stops charging to lithium battery 200, charging current is adjusted to the 3rd preset value.
Preferably, the second preset value is 1/10th of the first preset value, and the 3rd preset value is much smaller than the second preset value.
In the present embodiment, when the magnitude of voltage of lithium battery 200 reaches 4.2V, namely represent lithium battery 200 charging complete, then charging current is adjusted to 1/10th of the first preset value, and now, charging module 10 stops charging to lithium battery 200.When charging module 10 stops charging to lithium battery 200, charging current will be adjusted to and be less than 2 μ A, make charging module 10 to enter low-power consumption mode.
Particularly, charging current regulating circuit 11 by regulating resistance, and then achieves the adjustment to the charging current that charging module 10 exports.
By arranging charging current regulating circuit 11 in charging module 10, make charging module 10 not only automatically can stop charging, and low-power consumption mode is remained in non-charged state, make the overall power of power-supply management system 100 reach the microampere order of units, thus greatly reduce the overall power of power-supply management system 100.
In addition, charging module 10 can adopt the charging chip carrying anti-reverse defencive function, to avoid building reverse connection prevention protection circuit again in periphery, reduce further the complexity of circuit structure, reduces the cost of power-supply management system 100.
Further, charging module 10 comprises a charging instruction port and charging complete instruction port.Whether charging instruction port is used to indicate lithium battery 200 and charges.Charging complete instruction port is used to indicate lithium battery 200 and whether completes charging.
In the present embodiment, charging instruction port and charging complete instruction port are all indicated by output low level signal, namely represent that lithium battery 200 charges during charging instruction port output low level signal, during charging complete instruction port output low level signal, represent that lithium battery 200 completes charging.
Certainly, in other embodiments, charging instruction port and charging complete instruction port also can indicate by exporting the charged state of high level signal to lithium battery 200, and the present embodiment is not as limit.
Further, charging instruction port and charging complete instruction port can also external LED or buzzers, and sounding with or buzzer bright by LED indicates the charged state of lithium battery 200.
As shown in Figure 2, during a charging module 10 external power supply 300, protective loop 21 is charge circuit.Now, power supply 300 output supply voltage to charging module 10, then exports lithium battery 200 to via protection module 20, to charge to lithium battery 200.
During a protection module 20 external load 400, protective loop 21 is discharge loop.Now, lithium battery 200 output supply voltage, to protection module 20, exports load 400 to via protection module 20, to power to load 400.
Certainly, if during power-supply management system 100 external power supply 300 and load 400 simultaneously, protective loop 21 had both been charge circuit is also discharge loop.
Further, power-supply management system 100 also comprises a regulating filtering module 30, carries out voltage regulation filtering for the supply voltage exported discharge loop, to provide the supply voltage after voltage regulation filtering to load 400.Be appreciated that now, lithium battery 200 output supply voltage to protection module 20, then exports load 400 to via regulating filtering module 30, to provide the supply voltage after voltage regulation filtering to load 400.
Wherein, regulating filtering module 30 comprises voltage stabilizing circuit and capacitor filter.
In the present embodiment, voltage stabilizing circuit adopts 3.3V voltage stabilizing chip to realize voltage stabilizing, export after the supply voltage exported by discharge loop by this voltage stabilizing chip is reduced to 3.3V accurately, its quiescent current consumed is less than 2 μ A, further ensures the overall power of power-supply management system 100.
In sum, the circuit structure of power-supply management system 100 of the present utility model is simple and cost is low, and overall power is the microampere order of units, makes it not be limited to the volume requirement of small area analysis load equipment, especially can meet the loading demand of low power dissipation electron product.
Foregoing, is only preferred embodiment of the present utility model, does not form the restriction to the utility model protection range.Any do within spirit of the present utility model and principle amendment, equivalent to replace and improvement etc., all should be included within protection range of the present utility model.
Claims (10)
1. a power-supply management system; be applied to lithium battery; it is characterized in that; comprise: an interconnective charging module and a protection module; described protection module and described lithium battery form a protective loop; described protection module, by detecting described protective loop, makes described charging module can carry out safe charging to described lithium battery.
2. power-supply management system as claimed in claim 1; it is characterized in that, described protection module comprises a voltage detecting circuit, for detecting the magnitude of voltage of described lithium battery; with when detecting that the magnitude of voltage of described lithium battery exceedes preset voltage value scope, disconnect described protective loop.
3. power-supply management system as claimed in claim 2, it is characterized in that, described preset voltage value scope is 2.5V – 4.3V.
4. power-supply management system as claimed in claim 1; it is characterized in that; described protection module comprises a current detection circuit; for detecting the output current value of described protective loop; with when detecting that the output current value of described protective loop exceedes pre-set current value, disconnect described protective loop.
5. power-supply management system as claimed in claim 4, it is characterized in that, described pre-set current value is 150mA.
6. power-supply management system as claimed in claim 1, it is characterized in that, described charging module comprises a charging current regulating circuit, for the charging current regulating described charging module to export; When described lithium battery charges, described charging current is adjusted to the first preset value; When described lithium cell charging completes, described charging current is adjusted to the second preset value, stops charging to described lithium battery to make described charging module; When described charging module stops charging to described lithium battery, described charging current is adjusted to the 3rd preset value.
7. power-supply management system as claimed in claim 6, it is characterized in that, described second preset value is 1/10th of described first preset value, and described 3rd preset value is less than described second preset value.
8. power-supply management system as claimed in claim 1, is characterized in that, described charging module comprises a charging instruction port and charging complete instruction port, and whether described charging instruction port is used to indicate described lithium battery and charges; Described charging complete instruction port is used to indicate described lithium battery and whether completes charging.
9. power-supply management system as claimed in claim 1, is characterized in that, during the external power supply of described charging module, described protective loop is charge circuit; During the external load of described protection module, described protective loop is discharge loop.
10. power-supply management system as claimed in claim 9, is characterized in that, also comprise a regulating filtering module, carry out voltage regulation filtering for the supply voltage exported described discharge loop, to provide the supply voltage after voltage regulation filtering to described load.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520652228.9U CN204886320U (en) | 2015-08-26 | 2015-08-26 | Power management system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520652228.9U CN204886320U (en) | 2015-08-26 | 2015-08-26 | Power management system |
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| CN204886320U true CN204886320U (en) | 2015-12-16 |
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| CN201520652228.9U Active CN204886320U (en) | 2015-08-26 | 2015-08-26 | Power management system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106230075A (en) * | 2016-09-21 | 2016-12-14 | 安徽创世科技股份有限公司 | A kind of display packing of safety monitoring battery capacity of mobile terminal |
| CN108306350A (en) * | 2017-04-13 | 2018-07-20 | 深圳市三诺电子有限公司 | A kind of small battery charging method and its device |
-
2015
- 2015-08-26 CN CN201520652228.9U patent/CN204886320U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106230075A (en) * | 2016-09-21 | 2016-12-14 | 安徽创世科技股份有限公司 | A kind of display packing of safety monitoring battery capacity of mobile terminal |
| CN106230075B (en) * | 2016-09-21 | 2019-03-15 | 安徽创世科技股份有限公司 | A kind of display methods of safety monitoring battery capacity of mobile terminal |
| CN108306350A (en) * | 2017-04-13 | 2018-07-20 | 深圳市三诺电子有限公司 | A kind of small battery charging method and its device |
| CN108306350B (en) * | 2017-04-13 | 2023-09-08 | 深圳市三诺电子有限公司 | Small battery charging method and device |
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