Utility model content
In order to solve problem present in correlation technique, called out according to first aspect of the present utility model there is provided one kind charging
Awake circuit, including:
Wake module, is connected with the power management module and charging inlet of battery management system, for when the electricity respectively
Pond management system is in dormancy or power-down state, and when external charging plug and charging inlet connection, generation makes the power supply pipe
Manage module turn-on battery module and the wake-up signal of the supply access of the presetting module in the power-supply management system.
Alternatively, the circuit also includes:
Detection module, respectively the control module with the charging inlet and the battery management system be connected, for detecting
The connection status of the external charging plug and the charging inlet, so that the control module is abnormal in the connection status
When, generate fault cues signal and/or default control signal.
Alternatively, the circuit also includes:
Handover module, is connected with the wake module and the control module respectively, for receiving the control mould
During the preset function switching signal that block is sent, a control signal is generated, to control the detection process of the detection module.
Alternatively, the detection module includes:
Detection resistance R3;
One end of the detection resistance R3 is connected with the control module, and the other end of the detection resistance R3 fills with described
Electrical interface is connected.
Alternatively, the wake module includes:
Metal-oxide-semiconductor Q1, resistance R1, resistance R2 and diode D1;
The source electrode of the metal-oxide-semiconductor Q1 is connected with the positive pole of the battery module, drain electrode and the power supply of the metal-oxide-semiconductor Q1
Management module is connected, and the grid of the metal-oxide-semiconductor Q1 is connected by the resistance R2 with the positive pole of the diode D1;
The negative pole of the diode D1 is connected with the charging inlet;
One end of the resistance R1 is connected with the source electrode of the metal-oxide-semiconductor Q1 and the positive pole of the battery module respectively, described
The resistance R1 other end is connected with the grid of the metal-oxide-semiconductor Q1.
Alternatively, the handover module includes:
Triode Q2 and resistance R4;
The base stage of the triode Q2 is connected with the control module, colelctor electrode and the diode of the triode Q2
D1 positive pole connection, the grounded emitter of the triode Q2;
Base stage of the one end of the resistance R4 respectively with the control module and the triode Q2 is connected, the resistance R4
Emitter stage of the other end respectively with the triode Q2 be connected.
Alternatively, the handover module includes:
Relay;
The first input end of the relay is connected with the positive pole of the battery module, the second input of the relay
It is connected with the control module, the first output end of the relay is connected with the wake module, the second of the relay
Output head grounding.
Alternatively, the wake module includes:
Metal-oxide-semiconductor Q3, resistance R5 and resistance R6;
The source electrode of the metal-oxide-semiconductor Q3 is connected with the first output end of the relay, the drain electrode of the metal-oxide-semiconductor Q3 with it is described
Power management module is connected, and the grid of the metal-oxide-semiconductor Q3 is connected by the resistance R6 with the charging inlet;
One end of the resistance R5 is connected with the first output end of the relay and the source electrode of the metal-oxide-semiconductor Q3 respectively,
The other end of the resistance R5 is connected with the grid of the metal-oxide-semiconductor Q3.
According to second aspect of the present utility model there is provided a kind of power-supply management system, including above-mentioned charging wake-up circuit with
And power management module.
According to the third aspect of the present utility model, there is provided a kind of vehicle, including above-mentioned battery management system.
By above-mentioned technical proposal, battery management is automatically waken up when can be charged accessing external charging plug to vehicle
System, makes battery management system from power-down state automatically into normal operating conditions, user need not be by way of igniting by electricity
Pond management system wakes up, so as to simplify charging process, is convenient for users to operate, improves Consumer's Experience.
Other feature and advantage of the present utility model will be described in detail in subsequent embodiment part.
Embodiment
Embodiment of the present utility model is described in detail below in conjunction with accompanying drawing.It should be appreciated that herein
Described embodiment is merely to illustrate and explained the utility model, is not limited to the utility model.
Fig. 1 is a kind of structural representation of vehicle charging system according to an exemplary embodiment.Reference picture 1, fills
Electric wake-up circuit 210 is the part in battery management system 200.When battery management system 200 is in dormancy or power-down state
When, power supply unit 100 can by external charging plug 110 be Vehicular charging, charging wake-up circuit 210 can will in dormancy or under
The battery management system 200 of electricity condition is activated, and battery management system 200 is entered working condition, to the shape of Vehicular battery module
State is monitored and managed.In addition, battery module 300 is also powered to each functional module in battery management system 200.
In the utility model, the power-down state of battery management system refers to the power-down state of vehicle key-free, can be divided into
Two kinds of situations:One is to be directed to traditional keys activation system, and key is not inserted into the keyhole of vehicle, and now vehicle is in flame-out shape
State;Two be to be directed to the vehicle started without key, and vehicle is not detected by the key of user or user does not press startup on vehicle
Function button, now vehicle is in flameout state.
Fig. 2 and Fig. 3 are a kind of structural representations of charging wake-up circuit according to an exemplary embodiment.Such as Fig. 2
With shown in Fig. 3, in this embodiment, charging wake-up circuit includes wake module 211, detection module 213 and handover module 214.
Wake module 211 is connected with the power management module 212 and charging inlet of battery management system respectively, for outside
When portion's charging plug 110 and charging inlet connection, generation makes the turn-on battery module 300 of power management module 212 and power management
The wake-up signal of the supply access of presetting module (such as control module 215) in system.
Detection module 213 is connected with the control module 215 of charging inlet and battery management system respectively, for detecting outside
Charging plug 110, the connection status for detecting external charging plug 110 and charging inlet, so that control module 215 is in connection
When state is exception, generation fault cues signal and/or default control signal.
Handover module 214 is connected with wake module 211 and control module 215 respectively, for receiving control module 215
During the preset function switching signal of transmission, a control signal is generated, the detection process of detection module is controlled.
As shown in Fig. 2 in an embodiment of the present utility model, wake module 211 is specifically included:Metal-oxide-semiconductor Q1, resistance
R1, resistance R2 and diode D1.Wherein, metal-oxide-semiconductor Q1 source electrode is connected with the positive pole of battery module 300, metal-oxide-semiconductor Q1 drain electrode with
Power management module is connected, and metal-oxide-semiconductor Q1 grid is connected by resistance R2 with diode D1 positive pole;Diode D1 negative pole with
Charging inlet is connected;Resistance R1 one end is connected with metal-oxide-semiconductor Q1 source electrode and the positive pole of battery module 300 respectively, resistance R1's
The other end is connected with metal-oxide-semiconductor Q1 grid.In this embodiment, metal-oxide-semiconductor Q1 can be P-channel field-effect transistor (PEFT) pipe.
Power management module 212 can be when receiving the wake-up signal from wake module 211, turn-on battery module 300
With the power supply between the presetting module (such as detection module 213, handover module 214 and control module 215) in battery management system
Path.In addition, positive pole of the power management module 212 also with battery module 300 is connected, the work of protection battery management system can be played
With.
Detection module 213 is specifically included:Detection resistance R3.Wherein, detection resistance R3 one end connects with control module 215
Connect, as the reference voltage Vref needed for control module 215 provides detection, the detection resistance R3 other end is connected with charging inlet.
In this embodiment, charging inlet can include connection confirmation interface and protective grounding interface, wherein protective grounding
Interfacing ground.Also connection confirms interface and protective grounding interface in external charging plug, and connection confirms that interface and protection connect
Resistance R_CC is connected between ground interface.When external charging plug 110 is connected with charging inlet, one end of R_CC resistance and charging
The connection of interface confirms interface connection, and the other end is connected with protective grounding interface, resistance R_CC and detection resistance R3 formation partial pressures
Resistance R3 and resistance R_CC is grounded the reference voltage Vref of circuit, i.e. control module 215 output after testing.
Detection module 213 is used to obtain the magnitude of voltage between connection confirmation interface and ground wire in charging inlet.Control module 213
The resistance that the voltage between interface and ground wire is worth between external charging plug connection confirmation interface and ground wire is confirmed according to connection, will
The resistance is matched with default resistance value.Due to the vehicle plug of different size, it, which is connected, confirms interface and protective grounding
Resistance R_CC resistances between interface are different, when charging inlet is connected thereto, and connection confirms the electricity accessed between interface end and ground wire
The resistance for hindering R_CC is different, and control module 215 is preset with the resistance of the resistance R_CC in all types external charging plug.If even
When the resistance for meeting the resistance R_CC for confirming interface end access is matched with built-in resistance, then external charging plug 110 and charging
The connection status of mouth is normal;Conversely, then external charging plug 110 and the connection status of charging inlet are not connected or exception,
When detecting connection status for exception, control module 215 can send fault cues signal and/or default control signal.Failure
The form of cue can for example include but is not limited to:Sound, vibrations, light, the text or four of display on a display screen
Any combination of person.Default control signal is used to be controlled the related function module in battery management system, to keep away
Exempt from charging accident occur.
In another embodiment of the present utility model, default detection resistance can also be the detection resistance in detection module 213
R3.Detection module 213 also can obtain the resistance of external charging plug 110 according to detection resistance R3 voltage and reference voltage Vref
R_CC resistance.Control module 215 is matched to judge external charging plug 110 and charging according to resistance R_CC resistance
The process of the connection status of mouth is identical with the matching process of above-described embodiment, no longer describes in detail herein.
Handover module 214 is specifically included:Triode Q2.Wherein, triode Q2 base stage is grounded by resistance R4, colelctor electrode
It is connected with diode D1 positive pole, grounded emitter.In this example, triode Q2 is NPN type triode.
When battery management system is in power-down state and external charging plug 110 is not connected with charging inlet, power supply pipe
Reason module 212 is not turned on, and battery module 300 is powered without normal direction control module 215, therefore control module 215 is to handover module 214
No signal exports and does not provide reference voltage to detection module 213, and triode Q2 is in cut-off state, and reference voltage Vref is without confession
Electricity, to be also at high-impedance state at open circuit or high-impedance state, and the test point of detection module 213.
Now, electric current is minimum in resistance R1 or no current flows through, thus the voltage difference of resistance R1 left and right ends is minimum, far
Voltage Vsg needed for being turned on less than metal-oxide-semiconductor Q1 (P-channel field-effect transistor (PEFT) pipe).Therefore metal-oxide-semiconductor Q1 is not turned on, its drain no-voltage, nothing
Method output makes the wake-up signal that power management module 212 is turned on.
When the connection of external charging plug 110 and charging inlet confirms interface connection and external charging plug and charging inlet
The connection of protective grounding interface when, resistance R1 Jing Guo wake module 211 of the positive pole of battery module 300, resistance R2, diode
D1, the resistance R_CC ground connection (i.e. the negative pole of battery module) of external charging plug 110, forms a loop.In the loop, electricity
There is electric current to flow through on resistance R1, shown in voltage difference U _ R1 such as formulas (1) at resistance R1 two ends.
U_R1=(Us-U_D1) × R1/ (R1+R2+R_CC) (1)
Wherein, U_R1 is the voltage at resistance R1 two ends;Us is the output voltage of battery module 300, generally 12V or 24V;
U_D1 is the voltage difference at diode D1 two ends, about 0.7V;R1 is resistance R1 resistance;R2 is resistance R2 resistance;R_CC is
Resistance R_CC resistance.
Voltage difference U _ the R1 at resistance R1 two ends can be adjusted by the resistance for selecting resistance R1 and resistance R2.When voltage difference U _
When R1 is more than the voltage Vsg needed for metal-oxide-semiconductor Q1 is turned on, metal-oxide-semiconductor Q1 conductings, its drain voltage is equal to source voltage Us, now called out
Module 211 of waking up has wake-up signal to be input to power management module 212;Power management module 212 received and start after wake-up signal
Powered to the other functional modules of battery management system, battery module therefore battery module 300 can by power management module 212 to
Each module for power supply of battery management system, battery management system is to be waken up.
During being waken up to battery management system, wake module 211 keeps normal operating conditions, detection module
213 and handover module 214 both can be normal operating conditions or off position, as long as its working condition is to waking up
The function of module 211 will not produce influence.
After battery management system is waken up, control module 215 can be controlled to handover module 214, and to detection mould
Block 213 provides reference voltage.
It is assumed that default detection resistance is the resistance R_CC of external charging plug 110, detection resistance R_CC two ends are now preset
Voltage such as formula (2) shown in.
U_CC=Vref × R_CC/ (R3+R_CC) (2)
Wherein, U_CC is the voltage at default detection resistance R_CC two ends;Vref is reference voltage;R3 is detection resistance R3's
Resistance;R_CC is default detection resistance R_CC resistance.
Therefore, according to the resistance and reference voltage Vref of the magnitude of voltage at default detection resistance R_CC two ends, detection resistance R3
(for example, 5V), you can obtain the resistance of resistance R_CC in external charging plug, so as to realize to outside charging plug and charging
The connection of mouth confirms the detection of the connection status of interface.
But because wake module 211 can produce influence, i.e. battery module 300 just to the testing result of detection module 213
Pole is passed through the resistance R1 in wake module 211, resistance R2, diode D1 and reached at the detection tie point of detection module 213, and passes through
The resistance R_CC crossed in external charging plug 110 flows to GND (ground connection), will also pass through detection resistance R3 and flows to the defeated of reference voltage
Enter place, thus detection module 213 it is actually detected to voltage U_CC and formula (2) result and be not inconsistent, formula (2) is no longer applicable.
Therefore, after battery management system is activated, handover module 214 need to be controlled by control module 215, i.e.,
Preset function switching signal is exported, turns on triode Q2 (positive-negative-positive), then resistance R2 is directly grounded by triode Q2, resistance
The voltage of tie point between R2 and diode D1 positive pole is close to 0V.Further, since the resistance R_ of external charging plug 110
CC resistance is about 100 Ω~3.6k Ω, is understood according to formula (2), and U_CC is more than or equal to 0.5V.Because diode D1 has
During the high about 0.7V of the voltage of the positive ultimate ratio negative pole of one-way conduction performance, only diode D1, diode D1 can just be turned on.Due to two
Pole pipe D1 cathode voltage is close to 0V, and less than the voltage (about 1.2V) needed for its conducting, therefore diode D1 is in cut-off shape
State, approximate open circuit, i.e., no current passes through diode D1 in wake module 211, and the testing result of detection module 213 will not be caused
Influence.
After battery management system is activated, wake module 211 has completed its work, and now wake module 211 can both be located
In normal operating conditions, abnormal operating state can also be in.
As shown in figure 3, in another embodiment, the difference of charging wake-up circuit and the charging wake-up circuit shown in Fig. 2
It is that triode Q2 and wake module 211 are substituted for relay in the handover module 214 of the charging wake-up circuit of the embodiment
Including resistance R5, resistance R6 and metal-oxide-semiconductor Q3, detection module 213 and power management module 212 are identical.
The first input end of relay and the positive pole of battery module are connected, and the second input is connected with control module 215, the
One output end is connected with wake module, the second output head grounding.In embodiment of the present utility model, relay is in normally closed shape
State, i.e., when the second input of relay does not receive the preset function switching signal of the transmission of control module 215, it is first defeated
Enter end with the first output end to be connected.
The first output end connection of metal-oxide-semiconductor Q3 source electrode and relay in wake module 211, metal-oxide-semiconductor Q3 drain electrode and electricity
Source control module 212 is connected, and metal-oxide-semiconductor Q3 grid confirms that interface is connected by resistance R6 with being connected.Resistance R5 one end difference
It is connected with metal-oxide-semiconductor Q3 source electrode and the positive pole of battery module, the resistance R5 other end is connected with metal-oxide-semiconductor Q3 grid.
When battery management system is in power-down state and external charging plug 110 is not connected with charging inlet, power supply pipe
Reason module 212 disconnects, each module for power supply of the battery module 300 without normal direction battery management system, therefore 215 pairs of switchings of control module
The no signal of module 214 exports and does not provide reference voltage to detection module 213.Relay is in closure state, metal-oxide-semiconductor Q3 source
Pole is connected with the positive pole of battery, i.e. metal-oxide-semiconductor Q1 source voltage and the voltage of battery is equal, reference voltage Vref input
In open circuit or high-impedance state, and the test point of detection module 213 is also at high-impedance state.
Now, electric current is minimum in resistance R5 or no current flows through, thus the voltage difference of resistance R5 left and right ends is minimum, far
Voltage Vsg needed for being turned on less than metal-oxide-semiconductor Q3 (P-channel field-effect transistor (PEFT) pipe).Therefore metal-oxide-semiconductor Q3 is not turned on, its drain no-voltage, nothing
Method output makes the wake-up signal that power management module 212 is turned on.
When the connection of external charging plug 110 and charging inlet confirms interface connection and external charging plug and charging inlet
The connection of protective grounding interface when, resistance R5 Jing Guo wake module 211 of the positive pole of battery module 300, resistance R6, external charging
The resistance R_CC ground connection (i.e. the negative pole of battery module 300) of plug 110, forms a loop.In the loop, have on resistance R5
Electric current flows through, shown in voltage difference U _ R5 such as formulas (3) at resistance R5 two ends.
U_R5=Us × R5/ (R5+R6+R_CC) (3)
Wherein, U_R5 is the voltage at resistance R5 two ends;Us is the output voltage of battery module, generally 12V or 24V;R5
For resistance R5 resistance;R6 is resistance R6 resistance, and R_CC is resistance R_CC resistance.
Voltage difference U _ the R5 at resistance R5 two ends can be adjusted by resistance R5 and resistance R6 resistance.When voltage difference U _ R5 is big
When metal-oxide-semiconductor Q3 turns on required voltage Vsg, metal-oxide-semiconductor Q3 conductings, its drain voltage is equal to source voltage Us, now wakes up mould
Block 211 has wake-up signal to be input to power management module 212;Power management module 212, which to be received, start after wake-up signal to electricity
Management system other functional modules in pond are powered, and therefore battery module 300 can be by power management module 212 to battery for battery module
Each module for power supply of management system, battery management system is to be waken up.
During being waken up to battery management system, wake module 211 keeps normal operating conditions, detects circuit
213 and switching circuit 214 both can be normal operating conditions or off position, as long as its working condition is to waking up
Module 211 will not produce influence.
After battery management system is activated, control module 215 can be controlled to handover module 214, and to detection mould
Block 213 provides reference voltage.
It is assumed that default detection resistance is the resistance R_CC of external charging plug, the electricity at detection resistance R_CC two ends is now preset
Pressure is as shown in formula (4).
U_CC=Vref × R_CC/ (R3+R_CC) (4)
Wherein, U_CC is the voltage at default detection resistance R_CC two ends;Vref is reference voltage;R3 is detection resistance R3's
Resistance;R_CC is default detection resistance R_CC resistance.
Therefore, according to the resistance and reference voltage Vref of the magnitude of voltage at default detection resistance R_CC two ends, detection resistance R3
(for example, 5V), you can obtain the resistance of resistance R_CC in external charging plug, so as to realize to outside charging plug with being connected really
Recognize the detection of the connection status of interface.
But because wake module 211 can produce influence, i.e. battery module 300 just to the testing result of detection module 213
Pole is reached at the detection tie point of detection module 213 by resistance R5, resistance R6, will also pass through detection resistance R3 flow directions with reference to electricity
The input of pressure, thus detection module 213 it is actually detected to voltage U_CC and formula (4) result and be not inconsistent, formula (4) is no longer fitted
With.
Therefore, after battery management system is activated, handover module 214 need to be controlled by control module 215, i.e.,
Preset function switching signal is exported to relay by the second input of relay, makes relay adhesive, that is, make relay
The first input end of device and the first output end disconnect, then the connection of the positive pole of battery module 300 and metal-oxide-semiconductor Q3 source electrode disconnects,
No current flows through in resistance R5 and resistance R6, and now testing result of the wake module 211 no longer to detection module 213 produces shadow
Ring, therefore detection module 213 can normal work.
After battery management system is waken up, wake module 211 has completed its work, and now wake module 214 both can be at
Normal operating conditions, can also be in abnormal operating state.
Correspondingly, the utility model also provides a kind of battery management system, and the battery management system is called out including above-mentioned charging
Awake circuit and power management module.In one embodiment, battery management system also includes control module.
Correspondingly, the utility model also provides a kind of vehicle, and the vehicle includes above-mentioned battery management system.
Those skilled in the art are considering specification and after putting into practice the utility model, will readily occur to it is of the present utility model its
Its embodiment.The application is intended to any modification of the present utility model, purposes or adaptations, these modifications, use
Way or adaptations follow general principle of the present utility model and including the undocumented the art of the utility model
In common knowledge or conventional techniques.Description and embodiments are considered only as exemplary, real model of the present utility model
Enclose and spirit is pointed out by following claim.
It should be appreciated that the accurate knot that the utility model is not limited to be described above and is shown in the drawings
Structure, and various modifications and changes can be being carried out without departing from the scope.Scope of the present utility model only will by appended right
Ask to limit.