CN208548731U - Charging circuit and charging unit - Google Patents
Charging circuit and charging unit Download PDFInfo
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- CN208548731U CN208548731U CN201821018055.5U CN201821018055U CN208548731U CN 208548731 U CN208548731 U CN 208548731U CN 201821018055 U CN201821018055 U CN 201821018055U CN 208548731 U CN208548731 U CN 208548731U
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Abstract
The utility model is suitable for battery technology field, discloses a kind of charging circuit, comprising: the voltage detection module of detection cell output voltage value；When cell output voltage value is lower than the wake-up voltage of battery, the low pressure charging module of low current precharge is carried out to battery；When cell output voltage value rises to the wake-up voltage of battery, the normal pressure charging module of normal charge is carried out to battery；According to the output voltage values of battery, controls low pressure charging module and normal pressure charging module is switched to the control module of battery charging.The utility model is by control module according to the output voltage values of battery, control the switching of low pressure charging module and normal pressure charging module, for battery charging, and low current precharge is carried out by battery of the low pressure charging module to brownout, until battery voltage value rises to the wake-up voltage of battery, allow normal pressure charging module to battery carry out normal charge, avoid because cell voltage is too low be difficult to charge due to caused by waste, extend battery use the time.
Description
Technical field
The utility model belongs to battery technology field more particularly to a kind of charging circuit and charging unit.
Background technique
In the prior art, for battery (such as battery) when electricity exhausts fastly, its own voltage is lower (being less than 0.5V), generally
Charging unit can not charge to this A-battery, and user generally will mistakenly believe that battery and damage at this time, can not be followed by
It is continuous to use, it may select directly to scrap, result in waste of resources, and actually this battery reuses after can repairing.
Utility model content
The utility model embodiment provides a kind of charging circuit and charging unit, it is intended to when solving the brownout of battery without
The problem of method charges normal.
It is achieved when the utility model, the one side of the utility model provides a kind of charging circuit, comprising:
Detect the voltage detection module of cell output voltage value；
When the cell output voltage value is lower than the wake-up voltage of battery, the low pressure of low current precharge is carried out to battery
Charging module；
When the cell output voltage value rises to the wake-up voltage of battery, the normal pressure for carrying out normal charge to battery charges
Module；
It is connect respectively with the voltage detection module, low pressure charging module and normal pressure charging module, according to the output of battery
Voltage value, controls the low pressure charging module and normal pressure charging module is switched to the control module of battery charging.
Further, the low pressure charging module includes:
Low pressure rechargeable battery, the first electric-controlled switch and the first current limiting unit for limiting current direction；
The low pressure rechargeable battery, first electric-controlled switch and first current limiting unit are sequentially connected with；
First electric-controlled switch is connect with the control module；
The connection of the output end of first current limiting unit and battery；
When the cell output voltage value is lower than the wake-up voltage of battery, the control module conducting described first is automatically controlled
Switch is that battery charges.
Further, first current limiting unit includes the current-limiting resistance being serially connected and first diode.
Further, the normal pressure charging module includes:
Normal pressure rechargeable battery, the second electric-controlled switch and the second current limiting unit for limiting current direction；
Second electric-controlled switch is connect with the control module；
The connection of the output end of second current limiting unit and battery；
When the cell output voltage value rises to the wake-up voltage of battery, the control module conducting described second is automatically controlled
Switch is that battery charges.
Further, second current limiting unit includes the second diode.
Further, first electric-controlled switch and second electric-controlled switch are metal-oxide-semiconductor or relay.
Further, the voltage detection module includes:
Partial pressure unit；
The partial pressure unit is equipped with cell input terminal and voltage sampling port；
The connection of the output end of the cell input terminal and battery, the voltage sampling port are connect with the control module；
The control module passes through the voltage value for acquiring the voltage sampling port in real time, determines whether battery is in low pressure shape
State.
Further, the partial pressure unit includes at least two sectional pressure elements, and the voltage sampling port is located therein two points
It presses between element.
Further, the sectional pressure element is divider resistance.
The other side of the utility model provides a kind of charging unit, which includes above-mentioned charging circuit.
Compared with prior art, the utility model has the following beneficial effects:
The utility model, according to the output voltage values of battery, controls low pressure charging module and normal pressure charging by control module
The switching of module is charged for battery, and carries out low current precharge by battery of the low pressure charging module to brownout, until
Battery voltage value rises to the wake-up voltage of battery, allow normal pressure charging module to battery carry out normal charge, avoid because
Cell voltage is too low be difficult to charge and caused by waste, extend battery uses the time.
Detailed description of the invention
By reading a detailed description of non-restrictive embodiments in the light of the attached drawings below, the application's is other
Feature, objects and advantages will become more apparent upon:
Fig. 1 is the connection structure diagram of the utility model charging circuit one embodiment；
Fig. 2 is the circuit structure diagram of the utility model charging circuit one embodiment.
Specific embodiment
The application is described in further detail with reference to the accompanying drawings and examples.It is understood that this place is retouched
The specific embodiment stated is only used for explaining relevant utility model, rather than the restriction to the utility model.Further need exist for explanation
It is to illustrate only part relevant to utility model for ease of description, in attached drawing.
It should be noted that in the absence of conflict, the features in the embodiments and the embodiments of the present application can phase
Mutually combination.The application is described in detail below with reference to the accompanying drawings and in conjunction with the embodiments.
Under normal conditions, the cell voltage that electricity exhausts is too low, can not can not charge normal, and causes directly to scrap, cause
A degree of wasting of resources, the utility model embodiment provide a kind of charging circuit, increase low pressure charging module, described
When cell output voltage value is lower than the wake-up voltage of battery, low current precharge is carried out to battery, until battery voltage value rises to
The wake-up voltage of battery allows normal pressure charging module to carry out normal charge to battery, avoids because battery module voltages are too low
Be difficult to charge and caused by waste, extend battery module uses the time.
A kind of charging unit that the utility model embodiment provides first, the charging unit include charging circuit.
The charging circuit includes: the voltage detection module for detecting cell output voltage value；In the cell output voltage value
Lower than battery wake-up voltage when, to battery carry out low current precharge low pressure charging module；In the cell output voltage
When value rises to the wake-up voltage of battery, the normal pressure charging module of normal charge is carried out to battery；Respectively with the voltage detecting mould
Block, low pressure charging module are connected with normal pressure charging module, according to the output voltage values of battery, control the low pressure charging module and
Normal pressure charging module is switched to the control module of battery charging.
The utility model charging unit by control module according to the output voltage values of battery, control low pressure charging module and
Normal pressure charging module is switched to battery charging, and carries out low current preliminary filling by battery of the low pressure charging module to brownout
Electricity allows normal pressure charging module to carry out normal charge to battery, keeps away until battery voltage value rises to the wake-up voltage of battery
Exempted from because cell voltage is too low be difficult to charge due to caused by waste, extend battery use the time.
The charging circuit that the utility model embodiment also provides, referring to Fig. 1, which includes:
Detect the voltage detection module 4 of cell output voltage value；It is lower than the wake-up of battery in the cell output voltage value
When voltage, the low pressure charging module 2 of low current precharge is carried out to battery；Calling out for battery is risen in the cell output voltage value
When awake voltage, the normal pressure charging module 3 of normal charge is carried out to battery；Charge with the voltage detection module, low pressure mould respectively
Block is connected with normal pressure charging module, according to the output voltage values of battery, controls the low pressure charging module and normal pressure charging module
It is switched to the control module 1 of battery charging.
As a kind of optional embodiment, referring to fig. 2, control module 1 using MCU (Microcontroller Unit, it is micro-
Control unit), specifically, being provided with low pressure charge control end A, normal pressure charge control end B, voltage sampling port C on MCU, wherein
MCU is connect by low pressure charge control end A with low pressure charging module 2, and normal pressure charge control end B and normal pressure charging module 3 are passed through
Connection, is connect by voltage sampling port C with voltage detection module 4；
MCU detects the output voltage values of battery 5 by voltage detection module 4, and is controlled according to the output voltage values of battery 5
The switching of low pressure charging module 2 and normal pressure charging module 3 is charged for battery.Specifically, MCU is adopted in real time by voltage sampling port C
The voltage value of collecting voltage detection module 4 is calculated the output voltage values of battery 5 by the voltage value, then passed through the output voltage
Value is compared with preset threshold value, if output voltage values are lower than preset threshold, determines that battery 5 is currently at low-pressure state,
And the first electric-controlled switch 22 is connected, the second electric-controlled switch 32 is disconnected, is charged by low pressure charging module 2 to battery 5；If
MCU detects that the output voltage values of battery 5 are higher than preset threshold, then the second electric-controlled switch 32 is connected, disconnects the first electric-controlled switch
22, it is charged by normal pressure charging module 3 to battery module 5.It should be understood that being filled due to when 5 brownout of battery
Electric installation voltage can be pulled low to the output voltage of battery 5, lead to charging unit control system electricity shortage, cannot stablize work
Make, thus, when the voltage value of battery 5 is equal to or higher than wake-up voltage value, can just enable normal pressure charging module 3 charges,
Therefore above-mentioned threshold value is typically set at the wake-up voltage value of battery 5, it is of course also possible to be set higher than certain of the wake-up voltage value
A value.
The utility model, according to the output voltage values of battery, is controlled low pressure charging module 2 and normal pressure fills by control module 1
The switching of electric module 3 is charged for battery, and carries out low current precharge by battery of the low pressure charging module to brownout,
Until battery voltage value rises to the wake-up voltage of battery, allows normal pressure charging module to carry out normal charge to battery, avoid
Because cell voltage is too low be difficult to charge due to caused by waste, extend battery uses the time.
In one alternative embodiment of the utility model, low pressure charging module 2 includes that low pressure rechargeable battery 21, first is automatically controlled
Switch 22 and the first current limiting unit 23 for limiting current direction, wherein low pressure rechargeable battery 21, the first electric-controlled switch 22 and
First current limiting unit 23 is sequentially connected with, and the first electric-controlled switch 22 is connect with the low pressure charge control end A of MCU, the first current limiting unit
23 connect with the output end of battery 5, and control module 1 controls low pressure charging module by controlling the folding of the first electric-controlled switch 22
On-off between 2 and battery 5, when cell output voltage value rises to the wake-up voltage of battery, control module conducting second is automatically controlled
Switch is that battery charges.
In one alternative embodiment of the utility model, the first current limiting unit 23 include the current-limiting resistance R1 that is serially connected and
First diode D1, wherein the effect of current-limiting resistance R1 is: limitation charging current and partial pressure, reason are: on the one hand,
Battery 5 need to carry out low current precharge in low-pressure state, and the presence of current-limiting resistance R1 can limit charging current, on the other hand, electricity
Pond 5 can drag down charging unit voltage when low-pressure state charges, thus, current-limiting resistance R1 can be by the supply voltage of control module 1
It is pulled up to the output valve of low pressure rechargeable battery 21, to avoid the supply voltage of MCU by the influence of 5 current voltage of voltage.This
Outside, the effect of first diode D1 is, when normal pressure charging module 3 is connected, prevents asking for 2 perfusion of low pressure charging module
Topic.
In one alternative embodiment of the utility model, normal pressure charging module 3 includes that normal pressure rechargeable battery 31, second is automatically controlled
Switch 32 and the second current limiting unit 33 for limiting current direction, the normal pressure charge control end B of the second electric-controlled switch 32 and MCU
Connection, the second current limiting unit 33 are connect with the output end of battery 5, and MCU is controlled by controlling the folding of the second electric-controlled switch 32
On-off between normal pressure charging module 31 and battery module 5, when cell output voltage value rises to the wake-up voltage of battery, control
The second electric-controlled switch is connected as battery charging in module.
In one alternative embodiment of the utility model, the second current limiting unit 33 includes the second diode D2, similarly, the
The effect of two diode D2 is, when low pressure charging module 2 is connected, the problem of preventing normal pressure 3 perfusion of charging module.
In one alternative embodiment of the utility model, the first electric-controlled switch 22 and the second electric-controlled switch 32 are metal-oxide-semiconductor, when
So, other electric-controlled switch elements such as relay, transistor, triode can also be used, the utility model does not limit this.
In one alternative embodiment of the utility model, voltage detection module 4 includes partial pressure unit 41, and partial pressure unit 41 is set
There are cell input terminal a and voltage sampling port b, cell input terminal a to connect with the output end of battery 5, voltage sampling port b and MCU connect
It connects, whether control module determines battery 5 in low-pressure state by the voltage value of real-time collection voltages sampling end.
In one alternative embodiment of the utility model, partial pressure unit 41 include the first divider resistance R2 for being serially connected and
Second divider resistance R3, voltage sampling port is between the first divider resistance R2 and the second divider resistance R3.
The utility model, according to the output voltage values of battery, controls low pressure charging module and normal pressure charging by control module
The switching of module is charged for battery, and carries out low current precharge by battery of the low pressure charging module to brownout, until
Battery voltage value rises to the wake-up voltage of battery, allow normal pressure charging module to battery carry out normal charge, avoid because
Cell voltage is too low be difficult to charge and caused by waste, extend battery uses the time.The present embodiment also passes through the first limit of setting
The problem of flowing unit and the second current limiting unit, preventing low pressure charging module and normal pressure charging module perfusion.
" one embodiment " or " embodiment " mentioned in specification means the special characteristic described in conjunction with the embodiments, structure
Or characteristic includes at least one embodiment of the utility model.Therefore, the phrase " one that specification various places throughout occurs
A embodiment " or " embodiment " might not refer both to the same embodiment.
Although the preferred embodiment of the utility model has been described, once a person skilled in the art knows basic
Creative concept, then additional changes and modifications can be made to these embodiments.It is wrapped so the following claims are intended to be interpreted as
It includes preferred embodiment and falls into all change and modification of the scope of the utility model.
It is above-mentioned although specific embodiments of the present invention are described with reference to the accompanying drawings, but it is not practical new to this
The limitation of type protection scope, those skilled in the art should understand that, based on the technical solution of the present invention, ability
Field technique personnel do not need to make the creative labor the various modifications or changes that can be made still in the protection model of the utility model
Within enclosing.
Claims (10)
1. a kind of charging circuit characterized by comprising
Detect the voltage detection module of cell output voltage value；
When the cell output voltage value is lower than the wake-up voltage of battery, the low pressure for carrying out low current precharge to battery charges
Module；
When the cell output voltage value rises to the wake-up voltage of battery, the normal pressure charging mould of normal charge is carried out to battery
Block；
It is connect respectively with the voltage detection module, low pressure charging module and normal pressure charging module, according to the output voltage of battery
Value, controls the low pressure charging module and normal pressure charging module is switched to the control module of battery charging.
2. charging circuit according to claim 1, which is characterized in that the low pressure charging module includes:
Low pressure rechargeable battery, the first electric-controlled switch and the first current limiting unit for limiting current direction；
The low pressure rechargeable battery, first electric-controlled switch and first current limiting unit are sequentially connected with；
First electric-controlled switch is connect with the control module；
The connection of the output end of first current limiting unit and battery；
When the cell output voltage value is lower than the wake-up voltage of battery, first electric-controlled switch is connected in the control module
For battery charging.
3. charging circuit according to claim 2, which is characterized in that first current limiting unit includes the limit being serially connected
Leakage resistance and first diode.
4. charging circuit according to claim 1, which is characterized in that the normal pressure charging module includes:
Normal pressure rechargeable battery, the second electric-controlled switch and the second current limiting unit for limiting current direction；
Second electric-controlled switch is connect with the control module；
The connection of the output end of second current limiting unit and battery；
When the cell output voltage value rises to the wake-up voltage of battery, second electric-controlled switch is connected in the control module
For battery charging.
5. charging circuit according to claim 4, which is characterized in that second current limiting unit includes the second diode；
Second electric-controlled switch is metal-oxide-semiconductor or relay.
6. charging circuit according to claim 2, which is characterized in that first electric-controlled switch is metal-oxide-semiconductor or relay.
7. charging circuit according to claim 1, which is characterized in that the voltage detection module includes:
Partial pressure unit；
The partial pressure unit is equipped with cell input terminal and voltage sampling port；
The connection of the output end of the cell input terminal and battery, the voltage sampling port are connect with the control module；
The control module passes through the voltage value for acquiring the voltage sampling port in real time, determines whether battery is in low-pressure state.
8. charging circuit according to claim 7, which is characterized in that the partial pressure unit includes at least two partial pressure members
Part, the voltage sampling port are located therein between two sectional pressure elements.
9. charging circuit according to claim 8, which is characterized in that the sectional pressure element is divider resistance.
10. a kind of charging unit, which is characterized in that including charging circuit as claimed in any one of claims 1-9 wherein.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821018055.5U CN208548731U (en) | 2018-06-29 | 2018-06-29 | Charging circuit and charging unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821018055.5U CN208548731U (en) | 2018-06-29 | 2018-06-29 | Charging circuit and charging unit |
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| Publication Number | Publication Date |
|---|---|
| CN208548731U true CN208548731U (en) | 2019-02-26 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201821018055.5U Active CN208548731U (en) | 2018-06-29 | 2018-06-29 | Charging circuit and charging unit |
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| CN (1) | CN208548731U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110187162A (en) * | 2019-05-23 | 2019-08-30 | 北京长城华冠汽车科技股份有限公司 | Rouser, method and vehicle |
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2018
- 2018-06-29 CN CN201821018055.5U patent/CN208548731U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110187162A (en) * | 2019-05-23 | 2019-08-30 | 北京长城华冠汽车科技股份有限公司 | Rouser, method and vehicle |
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