CN203859538U - Charging protection circuit and bluetooth loudspeaker box - Google Patents
Charging protection circuit and bluetooth loudspeaker box Download PDFInfo
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- CN203859538U CN203859538U CN201320844407.3U CN201320844407U CN203859538U CN 203859538 U CN203859538 U CN 203859538U CN 201320844407 U CN201320844407 U CN 201320844407U CN 203859538 U CN203859538 U CN 203859538U
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Abstract
The utility model discloses a charging protection circuit and a bluetooth loudspeaker box having the same. According to the charging protection circuit, a detection module is used for detecting a voltage value of a battery module in real time. A control module is used for comparing the voltage value detected by the detection module with a preset value; if the voltage value is larger than the preset value, the control module controls a switching module for connection, thereby starting the battery module to charge peripheral equipment; and if the voltage value of the battery module is less than or equal to the preset value, the control module controls the switching module for disconnection, thereby stopping charging on the peripheral equipment by the batter module. According to the technical scheme, charging on the peripheral equipment can be prevented when the voltage value of the battery is lower than the preset safe value, thereby protecting the battery from being damaged and thus protecting the service life of the battery. Besides, the related circuit unit of the protection circuit is simple, so that the production cost of the protection circuit is lowered and the production cost of the equipment is also reduced.
Description
Technical field
The utility model relates to power technique fields, particularly relates to being a kind ofly applied to battery in portable equipment to the charge protector of outside equipment charge and Baffle Box of Bluetooth.
Background technology
Along with the development of technology, increasing portable set all possesses the function to outside equipment charge, as portable loudspeaker box, smart mobile phone etc.But portable set under battery mode during to outside equipment charge, needs the dump energy of comprehensive self battery to consider.When dump energy is less than safety value, need to close external charging, to protect battery not to be damaged.Otherwise, under battery low-electricity quantity state, continue outside equipment charge, easily damage battery, thereby shorten the useful life of battery.The charge protector cost that industry is used is at present higher, thereby has greatly increased the cost of product.
Foregoing is only understood the technical solution of the utility model for auxiliary, does not represent and admits that foregoing is prior art.
Utility model content
The utility model provides a kind of charge protector, be intended to avoid battery under the state of low electric weight to outside equipment charge, thereby protection battery useful life.In addition, this protective circuit production cost is lower, thereby reduces the production cost of equipment.
To achieve these goals, the utility model provides a kind of charge protector, this protective circuit
Comprise:
Battery module, for charging to external equipment;
Switch module, for being switched on or switched off described battery module and described external equipment, wherein, described switch module comprises first end, the second end and control end;
Detection module, for detection of the magnitude of voltage of described battery module;
Control module, controls being switched on or switched off of described switch module for detect the magnitude of voltage of battery module according to described detection module; When the magnitude of voltage of described battery module is greater than preset value, described control module is controlled described switch module and is connected, and described battery module is charged to external equipment; When the magnitude of voltage of described battery module is less than or equal to preset value, described control module is controlled described switch module and is disconnected, and makes described battery module stop charging to described external equipment;
The input of described detection module is connected with described battery module, the output of described detection module is connected with the input of described control module, the output of described control module is connected with the control end of described switch module, the first end of described switch module is connected with described battery module, and the second end of described switch module is connected with described external equipment.
Preferably, described detection module comprises the first resistance and the second resistance, and one end of described the first resistance is connected with described battery module, and the other end of described the first resistance is through the second grounding through resistance, wherein, the first resistance is connected with the input of described control module with the node between the second resistance.
Preferably, described control module comprises microcontroller, the first transistor, the 3rd resistance and the 4th resistance, the digital-to-analogue port of described microcontroller is connected with the output of described detection module, the I/O mouth of described microcontroller is connected with the base stage of described the first transistor through the 3rd resistance, and this I/O mouth is through the 4th grounding through resistance; The collector electrode of described the first transistor is connected with the control end of described switch module; The grounded emitter of described the first transistor; When the I/O of microcontroller mouth output high level, the first transistor conducting, when the I/O of microcontroller mouth output low level, the first transistor cut-off.
Preferably, described switch module comprises field effect transistor and the 5th resistance, the source electrode of described field effect transistor is connected with described battery module, the grid of described field effect transistor is connected as the control end of described switch module and the output of described control module, the drain electrode of described field effect transistor is connected with described external equipment, wherein, described the 5th resistance one end is connected with the source electrode of described field effect transistor, and the other end is connected with the grid of described field effect transistor.
Preferably, described switch module also comprises the adapter detection module that whether carries out adaptor charge for detection of described battery module, with and the adapter incoming end that is connected with described adapter, the input of described adapter detection module is connected with described adapter incoming end, and the output of described adapter detection module is connected with the control end of described switch module.
Preferably, described filter unit comprises the filter capacitor that carries out filtering for described battery module being exported to the voltage of described external equipment, and one end of described filter capacitor is connected with described battery module, and the other end is connected with the grid of described field effect transistor.
Preferably; charge protector also comprises the adapter detection module that whether carries out adaptor charge for detection of battery; with the adapter incoming end being connected with described adapter; the input of described adapter detection module is connected with described adapter incoming end, and the output of described adapter detection module is connected with the control end of described switch module.
Preferably, described adapter detection module comprises transistor seconds and the 6th resistance, the collector electrode of described transistor seconds is connected with the control end of described switch module, the base stage of described transistor seconds is connected with adapter incoming end through the 6th resistance, the grounded emitter of described transistor seconds, when described adapter charges to described battery, transistor seconds conducting, when described adapter does not charge to battery, transistor seconds cut-off.
Preferably, described adapter detection module comprises the 7th resistance, and described the 7th resistance one end is connected with described adapter incoming end, other end ground connection.
The utility model provides a kind of Baffle Box of Bluetooth, and this Baffle Box of Bluetooth has charge protector, and this charge protector comprises:
Battery module, for charging to external equipment;
Switch module, for being switched on or switched off described battery module and described external equipment, wherein, described switch module comprises first end, the second end and control end;
Detection module, for detection of the magnitude of voltage of described battery module;
Control module, controls being switched on or switched off of described switch module for detect the magnitude of voltage of battery module according to described detection module; When the magnitude of voltage of described battery module is greater than preset value, described control module is controlled described switch module and is connected, and described battery module is charged to external equipment; When the magnitude of voltage of described battery module is less than or equal to preset value, described control module is controlled described switch module and is disconnected, and makes described battery module stop charging to described external equipment;
The input of described detection module is connected with described battery module, the output of described detection module is connected with the input of described control module, the output of described control module is connected with the control end of described switch module, the first end of described switch module is connected with described battery module, and the second end of described switch module is connected with described external equipment.
Charge protector of the present utility model detects the magnitude of voltage of battery module in real time by detection module.Magnitude of voltage and preset value that control module detects detection module compare, if magnitude of voltage is greater than preset value, and control module control switch module conducting, thus start battery module to outside equipment charge.If cell voltage is less than or equal to preset value, control module control switch module cut-off, thus stop battery module to outside equipment charge.The utility model avoided battery during lower than default safety value to outside equipment charge, and then protected battery not to be damaged, thus the useful life of protection battery.On the other hand, the circuit that this protective circuit relates to is simple, has reduced the production cost of protective circuit, thereby has reduced the production cost of equipment.
Accompanying drawing explanation
Fig. 1 is the module diagram of the utility model charge protector;
Fig. 2 is the structural representation of the utility model charge protector one embodiment.
The realization of the utility model object, functional characteristics and advantage, in connection with embodiment, are described further with reference to accompanying drawing.
Embodiment
Should be appreciated that specific embodiment described herein is only in order to explain the utility model, and be not used in restriction the utility model.
With reference to Fig. 1 and 2, Fig. 1 is the module diagram of the utility model charge protector; Fig. 2 is the structural representation of the utility model charge protector one embodiment.A kind of charge protector that the present embodiment provides, this charge protector has avoided battery module 1 under the state of battery low-electricity quantity, external equipment 2 to be charged.This charge protector comprises battery module 1, switch module 3, detection module 4 and control module 5.Wherein, switch module 3 comprises first end, the second end and control end.The input of detection module 4 is connected with battery module 1, the output of detection module 4 is connected with the input of control module 5, the output of control module 5 is connected with the control end of switch module 3, the first end of switch module 3 is connected with battery module 1, and the second end of switch module 3 is connected with external equipment 2.
Battery module 1 is used to external equipment 2 to charge, and this module comprises battery and boosting unit, and cell output voltage is to boosting unit, boosting unit to the voltage receiving boost process and the direct voltage of stable output to external equipment 2 chargings.
Switch module 3 is for being switched on or switched off being connected of battery module 1 and external equipment 2, so that 1 pair of external equipment of battery module 2 starts charging or stops charging.Wherein, switch module 3 comprises first end, the second end and control end.
Detection module 4 is for detection of the magnitude of voltage of battery the magnitude of voltage that arrives at the output output detections of this module.
Control module 5 is for receiving the magnitude of voltage of detection module 4 outputs, if when magnitude of voltage is greater than preset value, control module 5 control switch modules 3 are connected.When if magnitude of voltage is less than or equal to the preset value of control module 5, control module 5 control switch modules 3 disconnect.
In the present embodiment, this charge protector is mainly used in the portable terminal device that can charge to external equipment 2, stop when the battery low-electricity quantity external equipment 2 chargings, thereby protection battery is not damaged for the protection of portable equipment.Switch module 3 connects battery modules 1 and external equipment 2 to be charged, has played switch.When switch module 3 conducting, 1 pair of external equipment 2 of battery module charges.When switch module 3 cut-off, battery module 1 stops external equipment 2 chargings.The dump energy of 4 pairs of batteries of detection module detects in real time, and the magnitude of voltage of the remaining battery that detection is obtained is sent to control module 5.Control module 5 sets in advance a definite value, cell voltage and preset value that control module 5 measures detection module 4 compare, when if magnitude of voltage is greater than preset value, control module 5 control switch modules 3 are connected, thereby make 2 chargings of 1 pair of external equipment of battery module.When if magnitude of voltage is less than or equal to preset value, control module 5 control switch module 3 cut-offs, thus battery module 1 is stopped external equipment 2 chargings.It should be noted that the preset value in control module 5 can adjust according to actual needs.
Charge protector of the present utility model detects the magnitude of voltage of battery module 1 in real time by detection module 4.Magnitude of voltage and preset value that control module 5 detects detection module 4 compare, if magnitude of voltage is greater than preset value, and control module 5 control switch module 3 conductings, thus start 2 chargings of 1 pair of external equipment of battery module.If cell voltage is less than or equal to preset value, control module 5 control switch module 3 cut-offs, thus stop 2 chargings of 1 pair of external equipment of battery module.The utility model avoided battery during lower than default safety value to external equipment 2 chargings, and then protected battery not to be damaged, thus the useful life of protection battery.On the other hand, the circuit that this protective circuit relates to is simple, has reduced the production cost of protective circuit, thereby has reduced the production cost of equipment.
Particularly, detection module 4 comprises the first resistance R 1 and the second resistance R 2.One end of the first resistance R 1 is connected with battery module 1, and the other end of the first resistance R 1 is through the second resistance R 2 ground connection, and wherein, the first resistance R 1 is connected with the input of control module 5 with the node between the second resistance R 2.
In the present embodiment, detection module 4 is connected and directly obtains the size of the residual voltage Vi of battery with battery module 1.The residual voltage Vi of battery is through the first resistance R 1 and the second resistance R 2 dividing potential drops, and the output of the node between the first resistance R 1 and the second resistance R 2 cell voltage Vo is to control module 5, thereby in real time the voltage of remaining battery detected.Magnitude of voltage Vo=Vi/ (R1+R2) the * R2 of remaining battery.
Particularly, control module 5 comprises microcontroller U, the first transistor Q1, the 3rd resistance R 3 and the 4th resistance R 4, the digital-to-analogue port of microcontroller U is connected with the output of detection module 4, the I/O mouth of microcontroller U is connected with the base stage of described the first transistor Q1 through the 3rd resistance R 3, and this I/O mouth is through the 4th resistance R 4 ground connection.The collector electrode of the first transistor Q1 is connected with the control end of switch module 3; The grounded emitter of the first transistor Q1; When the I/O of microcontroller U mouth output high level, the first transistor Q1 conducting, when the I/O of microcontroller U mouth output low level, the first transistor Q1 cut-off.
In the present embodiment, the output of detection module 4 is connected with the digital-to-analogue port of microcontroller U, and the magnitude of voltage of the remaining battery measuring is sent to the digital-to-analogue port of microcontroller U.Microcontroller U can arrange one as required for defining the preset value of battery electric quantity height, and microcontroller U contrasts the magnitude of voltage receiving and preset value.When magnitude of voltage is greater than preset value, battery electric quantity is high, I/O mouth output high level 3 conductings of control switch module of microcontroller U, thus make 2 chargings of 1 pair of external equipment of battery module.When magnitude of voltage is less than or equal to preset value; battery electric quantity is low; the I/O mouth output low level of microcontroller U 3 cut-offs of control switch module; battery module 1 is stopped external equipment 2 chargings; thereby avoided battery under the state of low electric weight, external equipment 2 to be charged, protected battery not to be damaged.
Particularly, switch module 3 comprises field effect transistor QP and the 5th resistance R 5, the source electrode of field effect transistor QP is connected with battery module 1, the grid of field effect transistor QP is connected with the output of control module 5 as the control end of switch module 3, the drain electrode of field effect transistor QP is connected with external equipment 2, wherein, the 5th resistance R 5 one end are connected with the source electrode of field effect transistor QP, and the other end is connected with the grid of field effect transistor QP.
In the present embodiment, the grid of field effect transistor QP is connected with control module 5, and the source electrode of field effect transistor QP is connected with battery module 1, and the drain electrode of field effect transistor QP is connected with external equipment 2.The direct voltage that it should be noted that battery module 1 output in the present embodiment is 5V.The voltage of exporting when control module 5 is less than 5V, and the drain voltage of field effect transistor QP is less than source voltage, makes drain electrode and source electrode conducting, has realized 2 chargings of 1 pair of external equipment of battery module.The voltage of exporting when control module 5 is not less than 5V, the drain electrode of field effect transistor QP and source electrode cut-off, and battery module 1 stops external equipment 2 chargings.Therefore, field effect transistor QP has played the effect of switch in the present embodiment.It should be noted that field effect transistor QP can also be replaced by other switch element, as PNP triode etc.In addition, the 5th resistance R 5 is mainly herein field effect transistor QP bias voltage is provided, and makes field effect transistor QP conducting when the voltage of control module 5 output is less than the voltage of battery module 1 output.
Further, switch module 3 also comprises the filter unit 31 that carries out filtering for battery module 1 being exported to the voltage of external equipment 2, and the input of filter unit 31 is connected with battery module 1, and the output of filter unit 31 is connected with the control end of switch module 3.
In the present embodiment, battery module 1 output voltage, to external equipment 2 chargings, tends to be subject to environmental interference, and then produces some interference signals.For fear of interference signal, enter external equipment 2, filter unit 31 is set in this protective circuit, this filter unit 31 is effectively by the interference signal filtering in battery module 1, thereby presses for external equipment 2 provides galvanic current more.
Particularly, filter unit 31 comprises the filter capacitor C1 that carries out filtering for battery module 1 being exported to the voltage of external equipment 2, and one end of filter capacitor C1 is connected with battery module 1, and the other end is connected with the grid of field effect transistor QP.
Further; charge protector also comprises the adapter detection module 6 that whether carries out adaptor charge for detection of battery module 1; with the adapter incoming end DC_IN being connected with adapter; the input of adapter detection module 6 is connected with adapter incoming end DC_IN, and the output of adapter detection module 6 is connected with the control end of switch module 3.
In the present embodiment, when battery charges by adapter, adapter incoming end DC_IN is connected and is with adapter and powers on.When adapter detection module 6 detects adapter battery is charged, these detection module 4 output low levels are to switch module 3,3 conductings of control switch module, thus make 2 chargings of 1 pair of external equipment of battery module.Because adapter is in a steady stream constantly to battery charging, even if, in low electric weight, also can not damaging battery, battery affects the life-span of battery.
Particularly, adapter detection module 6 comprises transistor seconds Q2 and the 6th resistance R 6, the collector electrode of transistor seconds Q2 is connected with the control end of switch module 3, the base stage of transistor seconds Q2 is connected with adapter incoming end DC_IN through the 6th resistance R 6, the grounded emitter of transistor seconds Q2, when adapter charges to battery, transistor seconds Q2 conducting, when adapter does not charge to battery, transistor seconds Q2 cut-off.
In the present embodiment, when adapter charges to battery, DC_IN is charged for adapter incoming end, makes transistor seconds Q2 conducting, thus the current collection that makes transistor seconds Q2 low level very.The control end of switch module 3 is connected with the collector electrode of transistor seconds Q2, thereby the control end of switch module 3 is pulled to low level, switch module 3 conductings, thus make 2 chargings of 1 pair of external equipment of battery module.It should be noted that transistor seconds Q2 can also replace with other switch element, as PMOS pipe etc.In addition, the 6th resistance R 6 shields to transistor seconds Q2 as current-limiting resistance, and the electric current of having avoided flowing into transistor seconds Q2 is excessive and burn out transistor seconds Q2.
Further, adapter detection module 6 comprises that the 7th resistance R 7, the seven resistance R 7 one end are connected with adapter incoming end DC_IN, other end ground connection.
In the present embodiment, the 7th resistance R 7 is herein as pull down resistor.In the situation that adapter does not charge to battery, adapter incoming end DC_IN is pulled to low level, thus the misoperation of having avoided adapter detection module 6 to cause because of interference signal.
The utility model also provides a kind of Baffle Box of Bluetooth, and this Baffle Box of Bluetooth comprises charge protector.The structure of this charge protector can, with reference to above-described embodiment, not repeat them here.Naturally, because the Baffle Box of Bluetooth of the present embodiment has adopted the technical scheme of above-mentioned charge protector, so this Baffle Box of Bluetooth has all beneficial effects of above-mentioned charge protector.
These are only preferred embodiment of the present utility model; not thereby limit the scope of the claims of the present utility model; every equivalent structure or conversion of equivalent flow process that utilizes the utility model specification and accompanying drawing content to do; or be directly or indirectly used in other relevant technical fields, be all in like manner included in scope of patent protection of the present utility model.
Claims (10)
1. a charge protector, is characterized in that, comprising:
Battery module, for charging to external equipment;
Switch module, for being switched on or switched off described battery module and described external equipment, wherein, described switch module comprises first end, the second end and control end;
Detection module, for detection of the magnitude of voltage of described battery module;
Control module, detects the magnitude of voltage of battery module and controls being switched on or switched off of described switch module according to described detection module; When the magnitude of voltage of described battery module is greater than preset value, described control module is controlled described switch module and is connected, and described battery module is charged to external equipment; When the magnitude of voltage of described battery module is less than or equal to preset value, described control module is controlled described switch module and is disconnected, and makes described battery module stop charging to described external equipment;
The input of described detection module is connected with described battery module, the output of described detection module is connected with the input of described control module, the output of described control module is connected with the control end of described switch module, the first end of described switch module is connected with described battery module, and the second end of described switch module is connected with described external equipment.
2. charge protector as claimed in claim 1; it is characterized in that; described detection module comprises the first resistance and the second resistance; one end of described the first resistance is connected with described battery module; the other end of described the first resistance is through the second grounding through resistance; wherein, the first resistance is connected with the input of described control module with the node between the second resistance.
3. charge protector as claimed in claim 1, it is characterized in that, described control module comprises microcontroller, the first transistor, the 3rd resistance and the 4th resistance, the digital-to-analogue port of described microcontroller is connected with the output of described detection module, the I/O mouth of described microcontroller is connected with the base stage of described the first transistor through the 3rd resistance, and this I/O mouth is through the 4th grounding through resistance; The collector electrode of described the first transistor is connected with the control end of described switch module; The grounded emitter of described the first transistor; When the I/O of microcontroller mouth output high level, the first transistor conducting, when the I/O of microcontroller mouth output low level, the first transistor cut-off.
4. charge protector as claimed in claim 1; it is characterized in that; described switch module comprises field effect transistor and the 5th resistance; the source electrode of described field effect transistor is connected with described battery module; the grid of described field effect transistor is connected as the control end of described switch module and the output of described control module; the drain electrode of described field effect transistor is connected with described external equipment, and described the 5th resistance one end is connected with the source electrode of described field effect transistor, and the other end is connected with the grid of described field effect transistor.
5. charge protector as claimed in claim 4; it is characterized in that; described switch module also comprises the filter unit that carries out filtering for described battery module being exported to the voltage of described external equipment; the input of described filter unit is connected with described battery module, and the output of described filter unit is connected with the control end of described switch module.
6. charge protector as claimed in claim 5; it is characterized in that; described filter unit comprises the filter capacitor that carries out filtering for described battery module being exported to the voltage of described external equipment; one end of described filter capacitor is connected with described battery module, and the other end is connected with the grid of described field effect transistor.
7. the charge protector as described in claim 1 to 6 any one; it is characterized in that; also comprise the adapter detection module that whether carries out adaptor charge for detection of described battery module; and the adapter incoming end being connected with described adapter; the input of described adapter detection module is connected with described adapter incoming end, and the output of described adapter detection module is connected with the control end of described switch module.
8. charge protector as claimed in claim 7; it is characterized in that; described adapter detection module comprises transistor seconds and the 6th resistance; the collector electrode of described transistor seconds is connected with the control end of described switch module; the base stage of described transistor seconds is connected with adapter incoming end through the 6th resistance; the grounded emitter of described transistor seconds; when described adapter charges to described battery; transistor seconds conducting; when described adapter does not charge to battery, transistor seconds cut-off.
9. charge protector as claimed in claim 8, is characterized in that, described adapter detection module comprises the 7th resistance, and described the 7th resistance one end is connected with described adapter incoming end, other end ground connection.
10. a Baffle Box of Bluetooth, is characterized in that, comprises the charge protector as described in claim 1 to 9 any one.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320844407.3U CN203859538U (en) | 2013-12-19 | 2013-12-19 | Charging protection circuit and bluetooth loudspeaker box |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320844407.3U CN203859538U (en) | 2013-12-19 | 2013-12-19 | Charging protection circuit and bluetooth loudspeaker box |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203859538U true CN203859538U (en) | 2014-10-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320844407.3U Expired - Fee Related CN203859538U (en) | 2013-12-19 | 2013-12-19 | Charging protection circuit and bluetooth loudspeaker box |
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| Country | Link |
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| CN (1) | CN203859538U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105006877A (en) * | 2015-04-27 | 2015-10-28 | 深圳市美贝壳科技有限公司 | Electric quantity real-time monitoring system of adapter and electric quantity real-time monitoring method of adapter |
| CN105591356A (en) * | 2016-03-07 | 2016-05-18 | 青岛歌尔声学科技有限公司 | Overvoltage and undervoltage protection circuit |
| CN110138056A (en) * | 2019-06-27 | 2019-08-16 | 深圳莱福德科技股份有限公司 | Emergency power supply guard method and device |
-
2013
- 2013-12-19 CN CN201320844407.3U patent/CN203859538U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105006877A (en) * | 2015-04-27 | 2015-10-28 | 深圳市美贝壳科技有限公司 | Electric quantity real-time monitoring system of adapter and electric quantity real-time monitoring method of adapter |
| CN105591356A (en) * | 2016-03-07 | 2016-05-18 | 青岛歌尔声学科技有限公司 | Overvoltage and undervoltage protection circuit |
| CN110138056A (en) * | 2019-06-27 | 2019-08-16 | 深圳莱福德科技股份有限公司 | Emergency power supply guard method and device |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141001 Termination date: 20201219 |