CN106169788B - Battery management unit, power supply method of battery management unit and battery system - Google Patents
Battery management unit, power supply method of battery management unit and battery system Download PDFInfo
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- CN106169788B CN106169788B CN201610563375.8A CN201610563375A CN106169788B CN 106169788 B CN106169788 B CN 106169788B CN 201610563375 A CN201610563375 A CN 201610563375A CN 106169788 B CN106169788 B CN 106169788B
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J2207/00—Indexing scheme relating to details of circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J2207/20—Charging or discharging characterised by the power electronics converter
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Abstract
The embodiment of the invention provides a battery management unit, a power supply method of the battery management unit and a battery system. The power supply method of the battery management unit in the embodiment of the invention is applied to the battery management unit comprising an isolation direct current converter, a Controller Area Network (CAN) converter, a non-isolation direct current converter, a logic chip and a first load; the isolation direct current converter, the non-isolation direct current converter and the first load respectively acquire electric energy of the battery pack from the battery pack, then the isolation direct current converter converts voltage of the acquired electric energy and provides the electric energy for the CAN converter by using the converted voltage, and then the non-isolation direct current converter converts the voltage of the acquired electric energy and provides the electric energy for the logic chip by using the converted voltage after receiving the wake-up signal. The technical scheme provided by the embodiment of the invention solves the problems of complex circuit structure, electric quantity waste and cost loss caused by using an additional power supply to supply power to the battery management unit in the prior art.
Description
[technical field]
The present invention relates to battery technology field more particularly to the suppliers of electricity of a kind of battery management unit, battery management unit
Method and battery system.
[background technique]
Currently, including mainly battery pack, battery management unit and load in battery system, battery pack is simply by cell tube
Reason unit provides electric energy for load, without providing electric energy for the electronic component in battery management unit, so, battery management list
Member electric energy generally by battery system outside additional power supply provide.
In realizing process of the present invention, at least there are the following problems in the prior art for inventor's discovery:
In the prior art, it is general by battery system outside additional power supply provided for the battery management unit in battery system
Electric energy, furthermore, it would be desirable to consider the static impedance protection of power port, Bulk current injection protection, overvoltage protection, under-voltage protection,
The functional designs such as reverse connecting protection and quiescent current control, circuit structure is complicated, also results in waste and the cost allowance of electricity.
[summary of the invention]
In view of this, the embodiment of the invention provides a kind of battery management unit, battery management unit method of supplying power to and
Battery system, to solve in the prior art using additional power supply be circuit structure caused by battery management unit is powered it is complicated,
The problem of wasting electricity and loss cost.
On the one hand, the embodiment of the invention provides a kind of battery management unit, the battery management unit includes that isolation is straight
Stream transformer, controller local area network's CAN converter, non-isolated direct current transducer, logic chip and the first load；Wherein,
The input terminal of the isolated DC converter is connected with battery pack, the first output end of the isolated DC converter
Ground connection, the second output terminal of the isolated DC converter connect the input terminal of the CAN converter, the CAN converter
First output end ground connection；
The first input end of the non-isolated direct current transducer is connected with the battery pack, the non-isolated direct current transducer
The first output end ground connection, the second output terminal of the non-isolated direct current transducer connects the input terminal of the logic chip, institute
State the output end ground connection of logic chip；
The input terminal of first load is connected with the battery pack, the output end ground connection of first load.
The aspect and any possible implementation manners as described above, it is further provided a kind of implementation, if the CAN turns
Parallel operation does not have arousal function, and the battery management unit further includes waking up chip；Wherein,
The input terminal for waking up chip is connected with the third output end of the isolated DC converter, the wake-up chip
The first output end ground connection.
The aspect and any possible implementation manners as described above, it is further provided a kind of implementation, the wake-up core
The second output terminal of piece is connected with the second input terminal of the non-isolated direct current transducer.
The aspect and any possible implementation manners as described above, it is further provided a kind of implementation, if the CAN turns
Parallel operation has arousal function, the second input terminal of the second output terminal of the CAN converter and the non-isolated direct current transducer
It is connected.
The aspect and any possible implementation manners as described above, it is further provided a kind of implementation, the cell tube
Managing unit further includes the second load；Wherein,
The input terminal of second load is connected with the third output end of the non-isolated direct current transducer, and described second is negative
The output end of load is grounded.
The aspect and any possible implementation manners as described above, it is further provided a kind of implementation, described second is negative
Carrying includes at least one in logic circuit, control chip, driving circuit and other electronic components.
A technical solution in above-mentioned technical proposal has the following beneficial effects:
Battery management unit provided by the embodiment of the present invention, by the improvement of the internal circuit in battery management unit,
Power supply of the additional power supply outside battery system to battery management unit is eliminated, changing by the battery pack in battery system is the battery
Battery management unit in system provides electric energy, avoids and is powered by additional power supply outside battery system for battery management unit
When complexity in need of consideration circuit structure, effectively simplify the circuit structure inside battery management unit, thus, avoid
The waste of unnecessary electricity, has saved equipment cost and power supply cost, in turn, solves and is using additional power supply in the prior art
The problem of complexity of circuit structure caused by battery management unit is powered, waste electricity and loss cost.
On the other hand, the embodiment of the invention provides a kind of method of supplying power to of battery management unit, it is applied to include isolation
The battery that direct current transducer, controller local area network's CAN converter, non-isolated direct current transducer, logic chip and first load
Administrative unit；
The described method includes:
The isolated DC converter, the non-isolated direct current transducer and first load are obtained from battery pack respectively
The electric energy of battery pack；
The isolated DC converter converts the voltage of the electric energy got, and utilizes the voltage after conversion
Electric energy is provided for the CAN converter；
The non-isolated direct current transducer turns the voltage of the electric energy got after receiving wake-up signal
It changes, and provides electric energy using the voltage after converting into the logic chip.
The aspect and any possible implementation manners as described above, it is further provided a kind of implementation, if the CAN turns
Parallel operation does not have arousal function, and the battery management unit further includes waking up chip；
The method also includes:
The isolated DC converter also provides electric energy using the voltage after converting into the wake-up chip.
The aspect and any possible implementation manners as described above, it is further provided a kind of implementation, it is described non-isolated
After direct current transducer receives wake-up signal, the electric energy that will acquire carries out voltage conversion, and utilizes the voltage after conversion
Electric energy is provided for the logic chip, comprising:
The non-isolated direct current transducer receives the wake-up signal that the wake-up chip is sent；
The non-isolated direct current transducer converts the voltage of the electric energy got, and utilizes the electricity after conversion
Pressure provides electric energy for the logic chip.
The aspect and any possible implementation manners as described above, it is further provided a kind of implementation, if the CAN turns
Parallel operation has arousal function；
After the non-isolated direct current transducer receives wake-up signal, the electric energy that will acquire carries out voltage conversion,
And electric energy is provided into the logic chip using the voltage after converting, comprising:
The non-isolated direct current transducer receives the wake-up signal that the CAN converter is sent；
The non-isolated direct current transducer converts the voltage of the electric energy got, and utilizes the electricity after conversion
Pressure provides electric energy for the logic chip.
The aspect and any possible implementation manners as described above, it is further provided a kind of implementation, the cell tube
Managing unit further includes the second load；
The method also includes:
After the non-isolated direct current transducer receives wake-up signal, also using the voltage after converting into second load
Electric energy is provided.
The aspect and any possible implementation manners as described above, it is further provided a kind of implementation, described second is negative
Carrying includes at least one in logic circuit, control chip, driving circuit and other electronic components.
A technical solution in above-mentioned technical proposal has the following beneficial effects:
The method of supplying power to of battery management unit provided by the embodiment of the present invention passes through electricity internal in battery management unit
The improvement on road eliminates power supply of the additional power supply outside battery system to battery management unit, changes by the battery in battery system
Packet provides electric energy for the battery management unit in the battery system, and avoiding by additional power supply outside battery system is battery management list
The circuit structure of complexity in need of consideration, effectively simplifies the circuit structure inside battery management unit when member is powered,
To avoid unnecessary electricity waste, save equipment cost and power supply cost, in turn, solve makes in the prior art
The problem of being complicated circuit structure caused by battery management unit is powered, waste electricity and lost cost with additional power supply.
In another aspect, the embodiment of the invention provides a kind of battery system, the battery system includes battery pack and above-mentioned
Battery management unit.
The aspect and any possible implementation manners as described above, it is further provided a kind of implementation, the battery system
System further includes load；
The output end of the battery pack connects the input terminal of the battery management unit；
The output end of the battery management unit connects the input terminal of the load.
A technical solution in above-mentioned technical proposal has the following beneficial effects:
Battery system provided by the embodiment of the present invention is cancelled by the improvement of the internal circuit in battery management unit
Power supply of the additional power supply to battery management unit outside battery system, changing by the battery pack in battery system is the battery system
In battery management unit provide electric energy, avoid when being powered by additional power supply outside battery system for battery management unit need
The complicated circuit structure to be considered, effectively simplifies the circuit structure inside battery management unit, thus, avoiding need not
The electricity waste wanted, has saved equipment cost and power supply cost, and in turn, solving in the prior art is battery using additional power supply
The problem of complexity of circuit structure caused by administrative unit is powered, waste electricity and loss cost.
[Detailed description of the invention]
In order to illustrate the technical solution of the embodiments of the present invention more clearly, below will be to needed in the embodiment attached
Figure is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the invention, for this field
For those of ordinary skill, without any creative labor, it can also be obtained according to these attached drawings other attached
Figure.
Fig. 1 is the electrical block diagram of the embodiment one of battery management unit provided by the embodiment of the present invention；
Fig. 2 is the electrical block diagram of the embodiment two of battery management unit provided by the embodiment of the present invention；
Fig. 3 is the flow diagram of the method for supplying power to of battery management unit provided by the embodiment of the present invention；
Fig. 4 is the electrical block diagram of battery system provided by the embodiment of the present invention.
[specific embodiment]
For a better understanding of the technical solution of the present invention, being retouched in detail to the embodiment of the present invention with reference to the accompanying drawing
It states.
It will be appreciated that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.Base
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts it is all its
Its embodiment, shall fall within the protection scope of the present invention.
The term used in embodiments of the present invention is only to be not intended to be limiting merely for for the purpose of describing particular embodiments
The present invention.In the embodiment of the present invention and the "an" of singular used in the attached claims, " described " and "the"
It is also intended to including most forms, unless the context clearly indicates other meaning.
It should be appreciated that term "and/or" used herein is only a kind of incidence relation for describing affiliated partner, indicate
There may be three kinds of relationships, for example, A and/or B, can indicate: individualism A, exist simultaneously A and B, individualism B these three
Situation.In addition, character "/" herein, typicallys represent the relationship that forward-backward correlation object is a kind of "or".
It will be appreciated that though may describe to input using term first, second, third, etc. in embodiments of the present invention
End, output end and load, but these input, output ends and load should not necessarily be limited by these terms.These terms are only used to will be defeated
Enter end, output end and load to be distinguished from each other out.
For example, first input end can also be referred to as the second input in the case where not departing from range of embodiment of the invention
End, similarly, the second input terminal can also be referred to as first input end.
Alternatively, in another example, in the case where not departing from range of embodiment of the invention, the first output end can also be referred to as
Two output ends, similarly, second output terminal can also be referred to as the first output end.
Alternatively, in another example, in the case where not departing from range of embodiment of the invention, the first load can also be referred to as second
Load, similarly, the second load can also be referred to as the first load.
Depending on context, word as used in this " if " can be construed to " ... when " or " when ...
When " or " in response to determination " or " in response to detection ".Similarly, depend on context, phrase " if it is determined that " or " if detection
(condition or event of statement) " can be construed to " when determining " or " in response to determination " or " when the detection (condition of statement
Or event) when " or " in response to detection (condition or event of statement) ".
Embodiment one
The embodiment of the present invention provides a kind of battery management unit, referring to FIG. 1, it is electricity provided by the embodiment of the present invention
The electrical block diagram of the embodiment one of pond administrative unit.
As shown in Figure 1, the battery management unit includes: isolated DC converter 11, controller local area network
(Controller Area Network, CAN) converter 12, non-isolated direct current transducer 13, logic chip 14 and the first load
15.Wherein, GND shown in Fig. 1 indicates ground connection.
Specifically, as shown in Figure 1, the input terminal of isolated DC converter 11 is connected with battery pack, isolated DC converter
11 the first output end ground connection, the input terminal of the second output terminal connection CAN converter 12 of isolated DC converter 11, CAN turn
First output end of parallel operation 12 is grounded.
Specifically, as shown in Figure 1, isolated DC converter 11 is for the electricity from battery system in the embodiment of the present invention
Chi Bao obtains electric energy, and converts to the voltage of the electric energy got, in turn, after isolated DC converter 11 is using conversion
Voltage is that CAN converter 12 provides electric energy.
As shown in Figure 1, the first input end of non-isolated direct current transducer 13 is connected with battery pack, non-isolated direct current transducer
13 the first output end ground connection, the input terminal of the second output terminal connection logic chip 14 of non-isolated direct current transducer 13, logic
The output end of chip 14 is grounded；
Specifically, as shown in Figure 1, non-isolated direct current transducer 13 is used for from battery system in the embodiment of the present invention
Battery pack obtains electric energy, and converts to the voltage of the electric energy got, and in turn, non-isolated direct current transducer 13 is receiving
After wake-up signal, it can use the voltage after converting as logic chip 14 and electric energy be provided.
As shown in Figure 1, the input terminal of the first load 15 is connected with battery pack, the output end ground connection of the first load 15.It can be with
Understand, the electric energy of the first load 15 is directly provided by the battery pack of battery system, that is, the power supply of the first load 15
Voltage does not need convert and can directly power.During a concrete implementation, the first load 15 may include
But it is not limited at least one in fan and other electronic components.
It is understood that as shown in Figure 1, the voltage for the electric energy that battery pack provides and 11 turns of isolated DC converter
The voltage of electric energy after changing is different；And voltage and the progress of non-isolated direct current transducer 13 of the electric energy of battery pack offer
The voltage of electric energy after conversion is also different.
It should be noted that the voltage of electric energy provided by battery pack can be determined according to actual needs, the present invention
Embodiment is to this without being particularly limited to.Specifically, the voltage for the electric energy that battery pack provides can be in the voltage model of 36V~60V
Enclose interior changed.For example, the voltage for the electric energy that battery pack provides can be 48V during a concrete implementation.
It should be noted that as shown in Figure 1, after the voltage for the electric energy that isolated DC converter 11 will acquire converted
The voltage for the electric energy that voltage and non-isolated direct current transducer 13 will acquire converted after voltage, can be according to reality
It is preset, the embodiment of the present invention is to this without being particularly limited to.Also, the electric energy that isolated DC converter 11 will acquire
Voltage converted after voltage and the voltage of electric energy that will acquire of non-isolated direct current transducer 13 converted after voltage
It can be identical, be also possible to different, the embodiment of the present invention is to this without being particularly limited to.
During a concrete implementation, as shown in Figure 1, it is contemplated that battery management unit internal electronic component makes
With voltage range, can preset the electric energy that isolated DC converter 11 will acquire voltage converted after voltage can be
12V。
During a concrete implementation, as shown in Figure 1, it is contemplated that battery management unit internal electronic component makes
With voltage range, can preset the electric energy that non-isolated direct current transducer 13 will acquire voltage converted after voltage can also be with
It is 12V.
Specifically, as shown in Figure 1, isolated DC converter 11 can be obtained directly from battery pack in the embodiment of the present invention
Electric energy is powered for itself；Also, isolated DC converter 11 can be directly by the electricity of the electric energy got from battery pack
Pressure is converted, and then provides electric energy using the voltage after converting into CAN converter 12.
Specifically, as shown in Figure 1, non-isolated direct current transducer 13 can be obtained directly from battery pack in the embodiment of the present invention
Electric energy is taken, is powered for itself；But non-isolated direct current transducer 13 just will do it only after receiving wake-up signal
Work.That is, the electric energy that non-isolated direct current transducer 13 only after receiving wake-up signal, can will just be got from battery pack
Voltage converted, and then provide electric energy using the voltage after converting into logic chip 14.That is, if not isolated DC is converted
Device 13 is not received by wake-up signal, then non-isolated direct current transducer 13 will not voltage to the electric energy got from battery pack into
Row conversion, and then electric energy can not be provided for logic chip 14.
It should be noted that as shown in Figure 1, isolated DC converter 11 be CAN converter 12 provide electric energy be can not
Intermittent progress, rather than it is then to receive wake-up signal in satisfaction that isolated DC converter 13, which provides electric energy for logic chip 14,
It just will do it after this condition.In this way, being that CAN converter 12 provides continual electricity by isolated DC converter 11
Can, it ensure that the normal operation of CAN converter 12, and then ensure that the information exchange of battery management unit and ambient controller；
Rather than isolated DC converter 13 is before being not received by wake-up signal, be it is idle, by non-isolated direct current transducer 13
The logic chip 14 and other electronic components being powered be also it is idle, be effectively saved power resource, avoided
Unnecessary waste of energy.
Specifically, battery management unit provided by the embodiment of the present invention can also include waking up chip and the second load.
Referring to FIG. 2, its electrical block diagram for the embodiment two of battery management unit provided by the embodiment of the present invention.Such as figure
Shown in 2, which includes: isolated DC converter 11, CAN converter 12, non-isolated direct current transducer 13, logic
The load of chip 14, first 15 wakes up chip 16 and the second load 17.Wherein, GND shown in Fig. 2 indicates ground connection.
Specifically, as shown in Fig. 2, the battery pack in battery system can directly be isolated DC in the embodiment of the present invention
Converter 11, non-isolated direct current transducer 13 and the first load 17 provide electric energy；And after isolated DC converter 11 is using conversion
Voltage, for CAN converter 12 and wake up chip 16 electric energy is provided；After non-isolated direct current transducer 13 receives wake-up signal,
Using the voltage after conversion, electric energy is provided for logic chip 14 and the second load 17.
In the embodiment of the present invention, the wake-up signal that non-isolated direct current transducer 13 receives, can include but is not limited to
Lower two kinds of situations.
The first, if CAN converter 12 does not have arousal function, as shown in Fig. 2, battery management unit further includes waking up core
Piece 16, non-isolated direct current transducer 13, which receives, wakes up the wake-up signal that chip 16 is sent.
It, can be with it should be noted that CAN converter 12 does not have arousal function as shown in Fig. 2, in the embodiment of the present invention
It is that CAN converter 12 does not have the function of receiving the wake-up signal that battery system outer controller is sent；Alternatively, can also be CAN
Converter 12 does not have the function that wake-up signal is sent to non-isolated direct current transducer 13.At this time, it may be necessary to have arousal function
It wakes up chip 16 and receives the wake-up signal that battery system outer controller is sent, and the wake-up signal received is sent to non-isolated
Direct current transducer 13.Wherein, which works for waking up non-isolated direct current transducer 13.
During a concrete implementation, as shown in Fig. 2, waking up the input terminal and isolated DC converter 11 of chip 16
Third output end be connected, wake up chip 16 the first output end ground connection.Specifically, wake up chip 16 second output terminal with it is non-
Second input terminal of isolated DC converter 13 is connected.
It is understood that as shown in Fig. 2, the electric energy of wake-up chip 16, is by the isolated DC in battery management unit
Converter 11 is provided using the voltage after conversion.
Second, if CAN converter 12 has arousal function, as shown in Figure 1, non-isolated direct current transducer 13 receives CAN
The wake-up signal that converter 12 is sent.
During a concrete implementation, as shown in Figure 1, the second output terminal of CAN converter 12 and non-isolated direct current
Second input terminal of converter 13 is connected.
It should be noted that i.e. CAN turns as shown in Figure 1, CAN converter 12 has arousal function in the embodiment of the present invention
Parallel operation 12 has the function of receiving the wake-up signal that battery system outer controller is sent, also, is also equipped with the wake-up that will be received
Signal is sent to the function of non-isolated direct current transducer 13.Wherein, the wake-up signal is for waking up non-isolated direct current transducer 13
It works.
During a concrete implementation, in order to reduce the unnecessary waste to electricity, isolated DC converter 11
Load minimum wake-up system can be considered.As shown in Figure 1, isolated DC converter 11 is only that CAN converter 12 provides electric energy,
Wake-up system in battery management unit as shown in Figure 1 only includes CAN converter 12；Alternatively, as shown in Fig. 2, isolated DC
Converter 11 is only CAN converter 12 and wake-up chip 16 provides electric energy, the wake-up system in battery management unit as shown in Figure 2
System only includes that CAN converter 12 wakes up chip 16.
Specifically, can choose quiescent current isolated DC converter 11 as small as possible, CAN converter 12 and wake up core
Piece 16.Specifically, the input current of isolated DC converter 11 is smaller, the output electric current of isolated DC converter 11 is also smaller,
Specifically, as shown in Figure 1, the output electric current of isolated DC converter 11 can be hundred microampere orders.
Specifically, as shown in Fig. 2, battery management unit can also include but is not limited to second negative in the embodiment of the present invention
Carry 17.
During a concrete implementation, as shown in Fig. 2, the input terminal and non-isolated direct current transducer of the second load 17
13 third output end is connected, the output end ground connection of the second load 17.That is, non-isolated direct current transducer 13 receives wake-up
Afterwards, it can use the voltage after converting and provide electric energy into the second load 17.
Specifically, as shown in Fig. 2, the second load 17 can include but is not limited to logic circuit, control in the embodiment of the present invention
At least one in coremaking piece, driving circuit and other electronic components.
It should be noted that as shown in Fig. 2, voltage used in the first load 15 is battery system in the embodiment of the present invention
The voltage for the electric energy that battery pack in system provides, and voltage used in the second load 17 is then by battery management unit
Voltage after the non-isolated conversion of direct current transducer 13.
It is understood that during a concrete implementation, it can be according to the electronics member device in battery management unit
Voltage used in part determines how to be powered in battery management unit for the electronic component.
For example, it is assumed that the voltage for the electric energy that battery pack provides is 48V, rather than the voltage after the conversion of isolated DC converter is
12V；If voltage used in the fan in battery management unit is 48V, which is directly powered by battery pack, this
When, which can be used as the first load 15；Alternatively, voltage used in fan in battery management unit is 12V, then the wind
Fan cannot be directly powered by battery pack, but need to be powered by the voltage after the conversion of non-isolated direct current transducer,
At this point, the fan can be used as the second load 17.
Alternatively, in another example, the high current that cannot achieve and be directly powered by 48V voltage, and need to be powered by 12V
Driving circuit belongs to the second load 17；And can be can be used as by the large driven current density circuit that 48V voltage is directly powered
One load 15.
Battery management unit provided by the embodiment of the present invention has the advantages that
Battery management unit provided by the embodiment of the present invention, by the improvement of the internal circuit in battery management unit,
Power supply of the additional power supply outside battery system to battery management unit is eliminated, changing by the battery pack in battery system is the battery
Battery management unit in system provides electric energy, thus, avoid by additional power supply outside battery system be battery management unit into
The circuit structure of complexity in need of consideration, effectively simplifies the circuit structure inside battery management unit when row power supply, in turn,
Unnecessary electricity waste is avoided, has saved equipment cost and power supply cost, therefore, the embodiment of the present invention solves existing skill
The use of additional power supply is complicated circuit structure caused by battery management unit is powered, waste electricity in art and loses asking for cost
Topic.
Embodiment two
The embodiment of the invention provides a kind of method of supplying power to of battery management unit, referring to FIG. 3, it is implemented for the present invention
The flow diagram of the method for supplying power to of battery management unit provided by example.
The method of supplying power to of the battery management unit is applied to include isolated DC converter, CAN converter, non-isolated direct current
The battery management unit of converter, logic chip and the first load；
As shown in figure 3, this method comprises:
S301, isolated DC converter, non-isolated direct current transducer and the first load obtain electric energy from battery pack respectively.
The electric energy of isolated DC converter, non-isolated direct current transducer and the first load is by the electricity in battery management unit
What Chi Bao was directly provided.That is, the supply voltage of isolated DC converter, non-isolated direct current transducer and the first load is to be not required to
Carry out what conversion can directly power.
During a concrete implementation, the first load be can include but is not limited in fan and other electronic components
At least one.
It should be noted that the voltage of electric energy provided by battery pack can be determined according to actual needs, the present invention
Embodiment is to this without being particularly limited to.Specifically, the voltage for the electric energy that battery pack provides can be in the voltage model of 36V~60V
Enclose interior changed.During a concrete implementation, the voltage for the electric energy that battery pack provides can be 48V.
S302, isolated DC converter convert the voltage of the electric energy got, and are using the voltage after conversion
CAN converter provides electric energy.
Specifically, isolated DC converter obtains electric energy for the battery pack from battery system in the embodiment of the present invention,
And the voltage of the electric energy got is converted, in turn, isolated DC converter is using the voltage after converting into CAN converter
Electric energy is provided.
It is understood that the voltage and isolated DC converter of the electric energy that battery pack provides converted after electric energy
Voltage is different.
It should be noted that isolated DC converter converted after electric energy voltage, can according to actual needs into
Row is default, and the embodiment of the present invention is to this without being particularly limited to.
During a concrete implementation, it is contemplated that battery management unit internal electronic component uses voltage model
Enclose, can preset the electric energy that isolated DC converter will acquire voltage converted after voltage can be 12V.
Specifically, the output electric current of isolated DC converter is smaller in the embodiment of the present invention, it can be hundred microampere orders.
Specifically, minimum wake-up system can be considered in the load of isolated DC converter.In a concrete implementation process
In, isolated DC converter is only that CAN converter provides electric energy；Alternatively, isolated DC converter is only CAN converter and wake-up
Chip provides electric energy.It is thereby possible to select quiescent current isolated DC converter as small as possible, CAN converter and wake-up core
Piece.
Specifically, in the embodiment of the present invention, isolated DC converter directly can obtain electric energy from battery pack, be itself into
Row power supply；Also, isolated DC converter can directly convert the voltage of the electric energy got from battery pack, in turn
Electric energy is provided using the voltage after converting into CAN converter.
S303, non-isolated direct current transducer convert the voltage of the electric energy got after receiving wake-up signal,
And electric energy is provided into logic chip using the voltage after converting.
Specifically, non-isolated direct current transducer obtains electricity for the battery pack from battery system in the embodiment of the present invention
Can, and the voltage of the electric energy got is converted, in turn, non-isolated direct current transducer, can after receiving wake-up signal
To provide electric energy into logic chip using the voltage after converting.
It is understood that battery pack provide electric energy voltage and non-isolated direct current transducer converted after electric energy
Voltage be different.Specifically, non-isolated direct current transducer converted after electric energy voltage, can be according to actual needs
It is preset, the embodiment of the present invention is to this without being particularly limited to.
During a concrete implementation, it is contemplated that battery management unit internal electronic component uses voltage model
Enclose, can preset the electric energy that non-isolated direct current transducer will acquire voltage converted after voltage be also possible to 12V.
It should be noted that isolated DC converter converted after electric energy voltage and non-isolated direct current transducer
The voltage of electric energy after being converted can be identical, be also possible to different, the embodiment of the present invention is to this without special
It limits.
Specifically, non-isolated direct current transducer directly can obtain electric energy from battery pack in the embodiment of the present invention, it is itself
It is powered；But non-isolated direct current transducer just will do it work only after receiving wake-up signal.That is, non-isolated
Direct current transducer can just convert the voltage of the electric energy got from battery pack only after receiving wake-up signal, into
And electric energy is provided into logic chip using the voltage after converting.That is, if not isolated DC converter is not received by wake-up letter
Number, then non-isolated direct current transducer will not convert the voltage of the electric energy got, and then can not provide for logic chip
Electric energy.
It should be noted that isolated DC converter for CAN converter provide electric energy can continual progress, and
Non-isolated direct current transducer, which provides electric energy then for logic chip, just to be will do it after satisfaction receives wake-up signal.In this way,
Continual electric energy is provided for CAN converter by isolated DC converter, ensure that the normal operation of CAN converter, in turn
It ensure that the information exchange of battery management unit and ambient controller；Rather than isolated DC converter is being not received by wake-up letter
Before number, be it is idle, the logic chip and other electronic components being powered by non-isolated direct current transducer are also
It is idle, it has been effectively saved power resource, has avoided unnecessary waste of energy.
Specifically, in the embodiment of the present invention, the wake-up signal that non-isolated direct current transducer receives may include but unlimited
In following two situation.
The first, if CAN converter does not have arousal function, battery management unit further includes waking up chip, non-isolated straight
Stream transformer, which receives, wakes up the wake-up signal that chip is sent.
It should be noted that CAN converter does not have arousal function in the embodiment of the present invention, CAN converter can be not
Has the function of receiving the wake-up signal that battery system outer controller is sent；Alternatively, can also be that CAN converter does not have to non-
The function of isolated DC converter transmission wake-up signal.At this time, it may be necessary to which the wake-up chip for having arousal function receives battery system
The wake-up signal that outer controller is sent, and the wake-up signal received is sent to non-isolated direct current transducer.Wherein, the wake-up
Signal works for waking up non-isolated direct current transducer.
Specifically, non-isolated direct current transducer, which receives, wakes up the wake-up signal that chip is sent, and in turn, non-isolated direct current conversion
Device converts the voltage of the electric energy got, and provides electric energy using the voltage after converting into logic chip.
During a concrete implementation, the electric energy of chip is waken up, is turned by the isolated DC in battery management unit
Parallel operation is provided using the voltage after conversion.
Second, if CAN converter has arousal function, non-isolated direct current transducer receives calling out for CAN converter transmission
Awake signal.
It should be noted that CAN converter has arousal function in the embodiment of the present invention, i.e. CAN converter has reception
Battery system outer controller send wake-up signal function, also, be also equipped with the wake-up signal that will be received be sent to it is non-every
Function from direct current transducer.Wherein, which works for waking up non-isolated direct current transducer.
Specifically, non-isolated direct current transducer receives the wake-up signal that CAN converter is sent, in turn, non-isolated direct current turns
Parallel operation converts the voltage of the electric energy got, and provides electric energy using the voltage after converting into logic chip.
Specifically, battery management unit can also include the second load in the embodiment of the present invention.
During a concrete implementation, after non-isolated direct current transducer receives wake-up signal, after also utilizing conversion
Voltage for second load electric energy is provided.
Specifically, the second load can include but is not limited to logic circuit, control chip, driving in the embodiment of the present invention
At least one in circuit and other electronic components.
It should be noted that voltage used in the first load is the battery pack in battery system in the embodiment of the present invention
The voltage of the electric energy of offer, and voltage used in the second load is then by the non-isolated direct current conversion in battery management unit
Voltage after device conversion.
It is understood that during a concrete implementation, it can be according to the electronics member device in battery management unit
Voltage used in part determines how to be powered in battery management unit for the electronic component.
For example, it is assumed that the voltage for the electric energy that battery pack provides is 48V, rather than the voltage after the conversion of isolated DC converter is
12V；If voltage used in the fan in battery management unit is 48V, which is directly powered by battery pack, this
When, which belongs to the first load；Alternatively, voltage used in fan in battery management unit is 12V, then the fan can not
It to be directly powered by battery pack, but needs to be powered by the voltage after the conversion of non-isolated direct current transducer, at this point, should
Fan belongs to the second load.
The part that the present embodiment is not described in detail can refer to the related description to Fig. 1.
The method of supplying power to of battery management unit provided by the embodiment of the present invention has the advantages that
The method of supplying power to of battery management unit provided by the embodiment of the present invention passes through electricity internal in battery management unit
The improvement on road eliminates power supply of the additional power supply outside battery system to battery management unit, changes by the battery in battery system
Packet provides electric energy for the battery management unit in the battery system, and avoiding by additional power supply outside battery system is battery management list
The circuit structure of complexity in need of consideration, effectively simplifies the circuit structure inside battery management unit when member is powered,
To avoid unnecessary electricity waste, save equipment cost and power supply cost, in turn, solve makes in the prior art
The problem of being complicated circuit structure caused by battery management unit is powered, waste electricity and lost cost with additional power supply.
Embodiment three
The embodiment of the invention provides a kind of battery systems, referring to FIG. 4, it is battery provided by the embodiment of the present invention
The electrical block diagram of system.
As shown in figure 4, the battery system includes battery pack 41 and above-mentioned battery management unit 42.
Specifically, as shown in figure 4, the battery system further includes load 43 in the embodiment of the present invention；The output of battery pack 41
The input terminal of end connection battery management unit 42, the input terminal of the output end connection load 43 of battery management unit 42.
Specifically, as shown in figure 4, the arrow direction in battery system indicates the flow direction of electric current, that is, battery system
In battery pack 41 be that battery management unit 42 provides electric energy, and be that load 43 provides electric energy by battery management unit 42.
The part that the present embodiment is not described in detail can refer to the related description to Fig. 1 and Fig. 2.
Battery system provided by the embodiment of the present invention has the advantages that
Battery system provided by the embodiment of the present invention is cancelled by the improvement of the internal circuit in battery management unit
Power supply of the additional power supply to battery management unit outside battery system, changing by the battery pack in battery system is the battery system
In battery management unit provide electric energy, avoid when being powered by additional power supply outside battery system for battery management unit need
The complicated circuit structure to be considered, effectively simplifies the circuit structure inside battery management unit, thus, avoiding need not
The electricity waste wanted, has saved equipment cost and power supply cost, and in turn, solving in the prior art is battery using additional power supply
The problem of complexity of circuit structure caused by administrative unit is powered, waste electricity and loss cost.
It is apparent to those skilled in the art that for convenience and simplicity of description, the system of foregoing description,
The specific work process of device and unit, can refer to corresponding processes in the foregoing method embodiment, and details are not described herein.
In several embodiments provided by the present invention, it should be understood that disclosed system, device and method can be with
It realizes by another way.For example, the apparatus embodiments described above are merely exemplary, for example, the unit
It divides, only a kind of logical function partition, there may be another division manner in actual implementation, for example, multiple units or group
Part can be combined or can be integrated into another system, or some features can be ignored or not executed.Another point, it is shown
Or the mutual coupling, direct-coupling or communication connection discussed can be through some interfaces, device or unit it is indirect
Coupling or communication connection can be electrical property, mechanical or other forms.
The unit as illustrated by the separation member may or may not be physically separated, aobvious as unit
The component shown may or may not be physical unit, it can and it is in one place, or may be distributed over multiple
In network unit.It can select some or all of unit therein according to the actual needs to realize the mesh of this embodiment scheme
's.
It, can also be in addition, the functional units in various embodiments of the present invention may be integrated into one processing unit
It is that each unit physically exists alone, can also be integrated in one unit with two or more units.Above-mentioned integrated list
Member both can take the form of hardware realization, can also realize in the form of hardware adds SFU software functional unit.
The above-mentioned integrated unit being realized in the form of SFU software functional unit can store and computer-readable deposit at one
In storage media.Above-mentioned SFU software functional unit is stored in a storage medium, including some instructions are used so that a computer
It is each that device (can be personal computer, server or network equipment etc.) or processor (Processor) execute the present invention
The part steps of embodiment the method.And storage medium above-mentioned includes: USB flash disk, mobile hard disk, read-only memory (Read-
Only Memory, ROM), random access memory (Random Access Memory, RAM), magnetic or disk etc. it is various
It can store the medium of program code.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Within mind and principle, any modification, equivalent substitution, improvement and etc. done be should be included within the scope of the present invention.
Claims (14)
1. a kind of battery management unit, which is characterized in that the battery management unit includes isolated DC converter, control general ability
Domain network C AN converter, non-isolated direct current transducer, logic chip and the first load；Wherein,
The input terminal of the isolated DC converter is connected with battery pack, the first output termination of the isolated DC converter
Ground, the second output terminal of the isolated DC converter connect the input terminal of the CAN converter, and the of the CAN converter
One output end ground connection；
The first input end of the non-isolated direct current transducer is connected with the battery pack, and the of the non-isolated direct current transducer
One output end ground connection, the second output terminal of the non-isolated direct current transducer connects the input terminal of the logic chip, described to patrol
Collect the output end ground connection of chip；
The input terminal of first load is connected with the battery pack, the output end ground connection of first load.
2. battery management unit according to claim 1, which is characterized in that if the CAN converter, which does not have, wakes up function
Can, the battery management unit further includes waking up chip；Wherein,
The input terminal for waking up chip is connected with the third output end of the isolated DC converter, and the of the wake-up chip
One output end ground connection.
3. battery management unit according to claim 2, which is characterized in that the second output terminal for waking up chip and institute
The second input terminal for stating non-isolated direct current transducer is connected.
4. battery management unit according to claim 1, which is characterized in that if the CAN converter has arousal function,
The second output terminal of the CAN converter is connected with the second input terminal of the non-isolated direct current transducer.
5. battery management unit according to claim 1, which is characterized in that the battery management unit further includes second negative
It carries；Wherein,
The input terminal of second load is connected with the third output end of the non-isolated direct current transducer, second load
Output end ground connection.
6. battery management unit according to claim 5, which is characterized in that second load includes logic circuit, control
At least one in coremaking piece, driving circuit and other electronic components.
7. a kind of method of supplying power to of battery management unit, which is characterized in that be applied to including isolated DC converter, control general ability
The battery management unit that domain network C AN converter, non-isolated direct current transducer, logic chip and first load；
The described method includes:
The isolated DC converter, the non-isolated direct current transducer and first load obtain electricity from battery pack respectively
Energy；
The isolated DC converter converts the voltage of the electric energy got, and is institute using the voltage after conversion
It states CAN converter and electric energy is provided；
The non-isolated direct current transducer converts the voltage of the electric energy got after receiving wake-up signal,
And electric energy is provided into the logic chip using the voltage after converting.
8. the method according to the description of claim 7 is characterized in that if the CAN converter does not have arousal function, the electricity
Pond administrative unit further includes waking up chip；
The method also includes:
The isolated DC converter also provides electric energy using the voltage after converting into the wake-up chip.
9. according to the method described in claim 8, it is characterized in that, the non-isolated direct current transducer receives wake-up signal
Afterwards, the electric energy that will acquire carries out voltage conversion, and provides electric energy using the voltage after converting into the logic chip, wraps
It includes:
The non-isolated direct current transducer receives the wake-up signal that the wake-up chip is sent；
The non-isolated direct current transducer converts the voltage of the electric energy got, and is using the voltage after conversion
The logic chip provides electric energy.
10. the method according to the description of claim 7 is characterized in that if the CAN converter has arousal function；
After the non-isolated direct current transducer receives wake-up signal, the electric energy that will acquire carries out voltage conversion, and benefit
Electric energy is provided with the voltage after converting into the logic chip, comprising:
The non-isolated direct current transducer receives the wake-up signal that the CAN converter is sent；
The non-isolated direct current transducer converts the voltage of the electric energy got, and is using the voltage after conversion
The logic chip provides electric energy.
11. the method according to the description of claim 7 is characterized in that the battery management unit further includes the second load；
The method also includes:
After the non-isolated direct current transducer receives wake-up signal, also provided using the voltage after converting into second load
Electric energy.
12. according to the method for claim 11, which is characterized in that it is described second load include logic circuit, control chip,
At least one in driving circuit and other electronic components.
13. a kind of battery system, which is characterized in that the battery system includes battery pack and such as any one of claim 1 to 6 institute
The battery management unit stated.
14. battery system according to claim 13, which is characterized in that the battery system further includes load；
The output end of the battery pack connects the input terminal of the battery management unit；
The output end of the battery management unit connects the input terminal of the load.
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| CN103326425A (en) * | 2013-06-05 | 2013-09-25 | 浙江吉利汽车研究院有限公司杭州分公司 | Automobile power battery management system and battery management method |
| CN104300639A (en) * | 2014-10-20 | 2015-01-21 | 中颖电子股份有限公司 | Power battery pack management system with low power consumption state automatic wakeup function |
| CN105242608A (en) * | 2015-10-27 | 2016-01-13 | 北京新能源汽车股份有限公司 | Vehicle control unit and control method thereof |
| CN105703021A (en) * | 2016-01-29 | 2016-06-22 | 惠州市蓝微新源技术有限公司 | Battery management system with low standby power consumption and battery management system awaking method |
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| CN100536297C (en) * | 2006-09-18 | 2009-09-02 | 扬智科技股份有限公司 | Power supply device for improving power supply conversion efficiency |
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| CN104300639A (en) * | 2014-10-20 | 2015-01-21 | 中颖电子股份有限公司 | Power battery pack management system with low power consumption state automatic wakeup function |
| CN105242608A (en) * | 2015-10-27 | 2016-01-13 | 北京新能源汽车股份有限公司 | Vehicle control unit and control method thereof |
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