CN110429681A - Battery management control system, method, apparatus and electronic product - Google Patents
Battery management control system, method, apparatus and electronic product Download PDFInfo
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- CN110429681A CN110429681A CN201910743492.6A CN201910743492A CN110429681A CN 110429681 A CN110429681 A CN 110429681A CN 201910743492 A CN201910743492 A CN 201910743492A CN 110429681 A CN110429681 A CN 110429681A
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- 238000005070 sampling Methods 0.000 claims description 46
- 238000007599 discharging Methods 0.000 claims description 33
- 239000003990 capacitor Substances 0.000 claims description 11
- 230000002265 prevention Effects 0.000 claims description 5
- 230000036039 immunity Effects 0.000 claims description 4
- 238000001914 filtration Methods 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 10
- 239000004065 semiconductor Substances 0.000 description 7
- 238000005265 energy consumption Methods 0.000 description 6
- 230000005669 field effect Effects 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 229910044991 metal oxide Inorganic materials 0.000 description 3
- 150000004706 metal oxides Chemical class 0.000 description 3
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
- H01M10/4257—Smart batteries, e.g. electronic circuits inside the housing of the cells or batteries
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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
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
- H01M2010/4271—Battery management systems including electronic circuits, e.g. control of current or voltage to keep battery in healthy state, cell balancing
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- Power Engineering (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention belongs to cell safety technical field, a kind of battery management control system, method, apparatus and electronic product are disclosed.The present invention is by being arranged sample circuit in battery management control system, and first switch circuit and second switch circuit are set simultaneously, so as to according to the current value and/or voltage value of the collected input battery management control system of sample circuit, determine currently it is using low current, small voltage charges the battery/discharge operation, or use high current, big voltage charges the battery/discharge operation, and then corresponding control signal is generated according to collected current value and/or voltage value, control first switch circuit or second switch circuit charge the battery/discharge operation.Make in this way battery management control system charge the battery/discharge operation when, the effect of low-power consumption not only may be implemented, but also compatible high current, the effect of big voltage may be implemented.
Description
Technical Field
The invention relates to the technical field of battery safety, in particular to a battery management control system, a method, a device and an electronic product.
Background
Battery management system (BATTERY MANAGEMENT SYSTEM, BMS) is the tie between BATTERY and the user, and the main object is secondary BATTERY, mainly is in order to improve the utilization ratio of BATTERY, prevents that overcharge and overdischarge from appearing in the BATTERY, can be used to electronic product such as electric automobile, storage BATTERY car, robot, unmanned aerial vehicle.
In order to prevent the overcharge and the overdischarge of the battery, most of the BMS on the market currently use a metal oxide semiconductor field effect transistor (MOS) or a relay as a power switch to control the charging operation or the discharging operation of the battery.
However, the scheme of the MOS transistor is generally only applicable to a scene where the current is less than 200A, when the current exceeds 200A, due to the problem of impedance consistency caused by circuit routing, the current of each MOS transistor is easily inconsistent when switching is performed, so that the current flowing through a part of the MOS transistors greatly exceeds a rated value, and the MOS transistors are burned out; although the relay scheme can solve the problems existing in the MOS tube scheme, the relay needs a drive current of hundreds of milliamperes during working, so that the power consumption is overlarge, and the use cost is influenced.
The above is only for the purpose of assisting understanding of the technical aspects of the present invention, and does not represent an admission that the above is prior art.
Disclosure of Invention
The present invention is directed to a battery management control system, method, device and electronic product, and aims to solve the above technical problems.
To achieve the above object, the present invention provides a battery management control system, including: the circuit comprises a sampling circuit, a first switch circuit and a second switch circuit; the sampling circuit is respectively connected with the first switch circuit and the second switch circuit, and the first switch circuit is connected with the second switch circuit; wherein,
the sampling circuit is used for acquiring a current value and a voltage value which are input into the battery management control system, generating a first control signal when the current value is smaller than a first current threshold value and/or the voltage value is smaller than a first voltage threshold value, and generating a second control signal when the current value is larger than a second current threshold value and/or the voltage value is larger than a second voltage threshold value;
the first switch circuit is used for controlling the charging operation or the discharging operation of a battery connected with the battery management control system when receiving the first control signal;
the second switch circuit is used for controlling the charging operation or the discharging operation of the battery when receiving the second control signal.
Preferably, the system further comprises a power resistor connected in series between the first switching circuit and the second switching circuit; wherein,
the power resistor is used for shunting the current value and/or dividing the voltage value when the current value is larger than a third current threshold value and/or the voltage value is larger than a third voltage threshold value.
Preferably, the system further comprises a drive circuit;
the driving circuit is used for amplifying the first control signal so that the first control signal can drive the first switch circuit to control the charging operation or the discharging operation of the battery when receiving the first control signal.
Preferably, the system further comprises a immunity capacitor, the immunity resistor being connected in parallel with the first switching circuit; wherein,
the anti-interference circuit is used for filtering electromagnetic interference information of the first control signal.
Preferably, the first switch circuit comprises at least one anti-overcharge metal oxide semiconductor field effect transistor (MOS) transistor and at least one anti-overdischarge MOS transistor;
the anti-overcharging MOS tube is used for controlling the charging operation of the battery when receiving the first control signal;
and the over-discharge prevention MOS tube is used for controlling the discharge operation of the battery when receiving the first control signal.
Preferably, the second switching circuit is a normally open relay.
Preferably, the sampling circuit is a sampling resistor or a hall sensor.
Further, to achieve the above object, the present invention also proposes a battery management control method applied to the battery management control system as described above, the system including: the circuit comprises a sampling circuit, a first switch circuit and a second switch circuit; the sampling circuit is respectively connected with the first switch circuit and the second switch circuit, and the first switch circuit is connected with the second switch circuit;
the battery management control method comprises the following steps:
the sampling circuit collects a current value and a voltage value input into the battery management control system, generates a first control signal when the current value is smaller than a first current threshold value and/or the voltage value is smaller than a first voltage threshold value, and generates a second control signal when the current value is larger than a second current threshold value and/or the voltage value is larger than a second voltage threshold value;
the first switch circuit controls the charging operation or the discharging operation of a battery connected with the battery management control system when receiving the first control signal;
the second switching circuit controls a charging operation or a discharging operation of the battery upon receiving the second control signal.
In addition, in order to achieve the above object, the present invention also provides a battery management control device, which includes the battery management control system as described above.
In addition, in order to achieve the above object, the present invention further provides an electronic product, which includes the battery management control apparatus as described above.
The invention sets a sampling circuit in a battery management control system, and sets a first switch circuit and a second switch circuit simultaneously, and the work of the battery management control system is that according to the current value and/or the voltage value which is input into the battery management control system and is collected by the sampling circuit, the battery management control system determines whether the current is to adopt the small current and the small voltage to carry out the charging/discharging operation on the battery or adopt the large current and the large voltage to carry out the charging/discharging operation on the battery, and then generates a corresponding control signal according to the collected current value and/or the collected voltage value to control the first switch circuit or the second switch circuit to carry out the charging/discharging operation on the battery. By the method, the battery management control system can realize the effect of low power consumption and the effect of compatibility with large current and large voltage when charging/discharging the battery.
Drawings
FIG. 1 is a block diagram of a first embodiment of a battery management control system according to the present invention;
FIG. 2 is a block diagram of a second embodiment of a battery management control system according to the present invention;
FIG. 3 is a schematic circuit diagram of a second embodiment of the battery management control system of the present invention;
fig. 4 is a flowchart illustrating a battery management control method according to a first embodiment of the present invention.
The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Referring to fig. 1, fig. 1 is a schematic structural view of a first embodiment of a battery management control system according to the present invention.
In a first embodiment, the battery management control system includes: a sampling circuit 100, a first switching circuit 200, and a second switching circuit 300.
As shown in fig. 1, the sampling circuit 100 is connected to the first switching circuit 200 and the second switching circuit 300, respectively, and the first switching circuit 200 and the second switching circuit 300 are connected to each other.
The sampling circuit 100 is configured to collect a current value and a voltage value input to a battery management control system, generate a first control signal when the current value is smaller than a first current threshold and/or the voltage value is smaller than a first voltage threshold, and generate a second control signal when the current value is larger than a second current threshold and/or the voltage value is larger than a second voltage threshold; the first switch circuit 200 is configured to control a charging operation or a discharging operation of a battery connected to the battery management control system when receiving the first control signal; the second switching circuit 300 is configured to control a charging operation or a discharging operation of the battery when receiving the second control signal.
In order to reflect the current and voltage values of the battery management control system collected by the sampling circuit 100, the current and voltage values are actually used.
Accordingly, the above-mentioned generation of the first control signal when the current value is smaller than the first current threshold and/or the voltage value is smaller than the first voltage threshold may be generated when the load at the present moment is smaller than the minimum load threshold; the second control signal generated when the current value is greater than the second current threshold and/or the voltage value is greater than the second voltage threshold may be generated when the load at the present moment is greater than the maximum load threshold.
It should be understood that the above-mentioned minimum load threshold is a load threshold that can embody the above-mentioned first current threshold and first voltage threshold in practical applications.
Accordingly, the maximum load threshold is a load threshold that can represent the second current threshold and the second voltage threshold in practical applications.
In addition, the above-mentioned "first" of the "first current threshold value" and the "first voltage threshold value" and the "second" of the "second current threshold value" and the "second voltage threshold value" are merely differences for distinguishing the current threshold value and the voltage threshold value used for generating the first control signal and the second control signal.
Accordingly, the "first" of the "first control signal" and the "second" of the "second control signal" are also used only for distinguishing whether the two control signals are used for controlling different switching circuits to perform charging operation or discharging operation.
In addition, since the actual application scenarios of the battery management control system are different, the minimum load threshold and the maximum load threshold supported by the battery management control system can be set by those skilled in the art as needed, and are not limited herein.
It should be understood that the sampling circuit 100, the first switching circuit 200 and the second switching circuit 300 are only referred to in this embodiment for convenience of description of the functions to be realized.
In practical applications, the sampling circuit 100 may specifically be formed by connecting a plurality of sampling resistors in parallel, and the resistance value of each sampling resistor may be selected by a person skilled in the art according to an application situation of the battery management control system, which is not limited herein.
In addition, in practical applications, a hall sensor may also be directly selected as the sampling circuit 100.
Correspondingly, the first switch circuit 200 may specifically be formed by a plurality of N-Metal-Oxide-Semiconductor field effect transistors (NMOS transistors) and/or a plurality of P-Metal-Oxide-Semiconductor field effect transistors (PMOS transistors).
In addition, at least one anti-overcharge MOS transistor and at least one anti-overdischarge MOS transistor are required to be present in the plurality of MOS transistors forming the first switching circuit 200. Therefore, when the first control signal is received, if it is determined that the battery needs to be charged currently according to the first control signal, the overcharge-preventing MOS tube in the first switch circuit 200 controls the battery to be charged, so as to avoid the overcharge of the battery; when the first control signal is received, if it is determined that the battery needs to be discharged currently according to the first control signal, the over-discharge prevention MOS transistor in the first switch circuit 200 controls the battery to perform the discharging operation, so as to avoid the over-discharge phenomenon sent by the battery.
In addition, since the second switch circuit 300 in this embodiment is substantially used to enable the battery management control system to operate normally when the load is large, the second switch circuit 300 is specifically a relay capable of supporting the passage of large current and large voltage.
In addition, in order to ensure that the battery management control system can achieve the effect of low energy consumption, the relay needs to select a normally open relay (also called a dynamic relay or an H-type relay), that is, when the coil is not powered, two contacts are open, and after the coil is powered on, the two contacts are closed, so that the second switch circuit 300, which is served by the relay, is inoperative in the initial starting state of the battery management control system, and is closed and switched on only when a second control signal is received, thereby greatly reducing unnecessary energy consumption.
It should be understood that the above description is only given for the selection of specific components in a battery management control system, and the technical solution of the present invention is not limited in any way, and in practical applications, those skilled in the art can select the components as needed, and the present invention is not limited herein.
As can be easily found from the above description, in the battery management control system provided in this embodiment, the sampling circuit is disposed in the battery management control system, and the first switch circuit and the second switch circuit are disposed at the same time, so that in the operation of the battery management control system, according to the current value and/or the voltage value, which is acquired by the sampling circuit and input into the battery management control system, it is determined whether to perform charging/discharging operation on the battery by using small current and small voltage, or to perform charging/discharging operation on the battery by using large current and large voltage, and then a corresponding control signal is generated according to the acquired current value and/or voltage value, so as to control the first switch circuit or the second switch circuit to perform charging/discharging operation on the battery. By the method, the battery management control system can realize the effect of low power consumption and the effect of compatibility with large current and large voltage when charging/discharging the battery.
It should be noted that the above-described embodiments of the apparatus are merely illustrative, and do not limit the scope of the present invention, and in practical applications, a person skilled in the art may select some or all of the modules to implement the purpose of the embodiments according to actual needs, and the present invention is not limited herein.
Based on the first embodiment of the battery management control system described above, a second embodiment of the battery management control system of the present invention is proposed.
As shown in fig. 2, the battery management control system further includes a power resistor 400.
The power resistor 400 is connected in series between the first switch circuit 200 and the second switch circuit 300, and is configured to shunt the current value and/or divide the voltage value when the current value is greater than a third current threshold and/or the voltage value is greater than a third voltage threshold.
It should be noted that, in this embodiment, a power resistor 400 is connected in series between the first switch circuit 200 and the second switch circuit 300, because the instantaneous current and/or the instantaneous voltage is too large at the moment of starting the battery management control system, or because the current and the voltage are disturbed by the outside at a certain moment, and the second switch circuit 300 capable of supporting the large current and the large voltage is in the off state, that is, is not in operation, in the initial starting state, so that it is desirable that the large current and the large voltage directly pass through the first switch circuit 200, and further the MOS transistor in the first switch circuit 200 is burned out. Therefore, in order to avoid that a large current and/or a large voltage passes through the first switch circuit and the MOS transistor in the first switch circuit is burned out when such a situation occurs, in this embodiment, a power resistor is connected in series between the first switch circuit 200 and the second switch circuit 300, so that when the acquired current value is greater than the third current threshold and/or the voltage value is greater than the third voltage threshold (when an instantaneous large current and/or large voltage occurs), the sampling circuit 100 may shunt the current value and/or divide the voltage value by the power resistor, thereby preventing the MOS transistor in the first switch circuit 200 from being burned out.
It should be noted that, regarding the resistance value of the power resistor, a person skilled in the art may select the resistance value according to an application scenario of the battery management control system, and the disclosure is not limited herein.
In addition, in practical applications, in order to ensure that the first control signal can drive the first switch circuit to control the charging operation or the discharging operation of the battery, a driving circuit may be further disposed between the sampling circuit and the first switch circuit, and the driving circuit amplifies the first control signal, so as to ensure that the first control signal can drive the first switch circuit to control the charging operation or the discharging operation of the battery when receiving the first control signal.
In addition, it is worth mentioning that the first switch circuit is composed of a plurality of anti-overcharge MOS tubes and a plurality of anti-overdischarge MOS tubes. Therefore, in practical application, in order to ensure that each anti-overcharge MOS transistor and each anti-overdischarge MOS transistor can be driven as required, the driving circuit may be composed of driving resistors with the number equal to the sum of the number of the anti-overcharge MOS transistors and the number of the anti-overdischarge MOS transistors, that is, each anti-overcharge MOS transistor corresponds to one driving resistor, and each anti-overdischarge MOS transistor corresponds to one driving resistor.
Furthermore, in order to ensure the accuracy of the driving operation, a plurality of anti-interference capacitors connected in parallel with the first switch circuit can be further arranged in the battery management control system, and the electromagnetic interference information in the first control signal is filtered by the anti-interference capacitors, so that the accuracy of the driving effect is ensured.
In order to facilitate understanding of the battery management control system provided in the present embodiment, the following description is made in detail with reference to a circuit diagram shown in fig. 3.
Specifically, in fig. 3, the sampling circuit 100 is specifically composed of a sampling resistor R100. Of course, in practical applications, the sampling resistor 100 may also be formed by connecting a plurality of sampling resistors in parallel, or directly select a hall sensor, which is not limited herein.
As shown in fig. 3, the first switch circuit 200 is composed of 6 NMOS transistors. Wherein, NOMS1, NOMS2 and NMOS3 are anti-overcharging MOS tubes, and NOMS4, NOMS5 and NMOS6 are anti-overdischarging MOS tubes. In addition, in the actual connection process, each anti-overcharge MOS transistor is connected in series with one anti-overdischarge MOS transistor, and then connected in parallel with other lines formed by connecting the anti-overcharge MOS transistors and the anti-overdischarge MOS transistors in series, so as to obtain the first switch circuit 200 in this embodiment.
In addition, it should be noted that, since a controller for controlling the 6 NMOS transistors is not shown in fig. 3, the control ends of the 6 NMOS transistors in fig. 3 are all in a floating state, and in practical application, the control ends of the 6 NMOS transistors need to be connected to the controller, so as to control the NMOS transistors.
In addition, it should be understood that the above is only given for a specific first switch circuit 200, and in practical applications, the number of MOS transistors included in the first switch circuit 200 is not particularly required, as long as at least one anti-overcharge MOS transistor and one anti-overdischarge MOS transistor are ensured to be present in the first switch circuit 200.
As shown in fig. 3, the second switch circuit 300 is a normally open relay K300, that is, the relay K300 is always in an open state when the sampling circuit 100 does not generate the second control signal.
Correspondingly, the resistor R400 in fig. 3 is the power resistor 400 in this embodiment, the resistor R501, the resistor R502, the resistor R503, the resistor R504, the resistor R505, and the resistor R506 are the driving circuits, and the capacitor C601 and the capacitor C602 are the anti-interference capacitors.
It should be understood that the specific circuit structure diagram of the battery management control system is given above, and in practical application, the number of the interference rejection capacitors can be set according to the requirement, and is not limited to 2 in fig. 3. In addition, in practical application, a person skilled in the art can refer to an existing battery management system, and set other components in the battery management control system to ensure that the battery management control system can reduce power consumption, is compatible with a working effect under a heavy load condition, and can realize functions of the existing battery management system.
In addition, the resistance values of the resistors, the capacitance values of the anti-interference capacitors, and the maximum loads (maximum current and maximum voltage) supported by the MOS transistor and the relay may be selected by those skilled in the art according to the practical application of the battery management system, which is not limited herein.
It should be understood that the above description is only given for the selection of specific components in a battery management control system, and the technical solution of the present invention is not limited in any way, and in practical applications, those skilled in the art can select the components as needed, and the present invention is not limited herein.
As can be easily found from the above description, in the battery management control system provided in this embodiment, a power resistor is connected in series between the first switch circuit and the second switch circuit, so that when the current value collected by the sampling circuit is greater than a third current threshold and/or the voltage value is greater than a third voltage threshold (a phenomenon of instantaneous large current and/or large voltage occurs), the power resistor shunts the current value and/or divides the voltage value, and thus it can be ensured that the MOS transistor in the first switch circuit is not burned out under a large load.
It should be noted that the above-described embodiments of the apparatus are merely illustrative, and do not limit the scope of the present invention, and in practical applications, a person skilled in the art may select some or all of the modules to implement the purpose of the embodiments according to actual needs, and the present invention is not limited herein.
Based on the battery management control system, the invention provides a battery management control device. The battery management control device includes the battery management control system as described above, and the specific structure of the battery management control system refers to the above-mentioned embodiments, and since the battery management control device adopts all the technical solutions of all the above-mentioned embodiments, the battery management control device at least has all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, and details are not repeated here.
Based on the battery management control device, the invention provides an electronic product. The electronic product includes the battery management control device as described above, and the specific structure of the battery management control device refers to the above embodiments, and since the electronic product adopts all technical solutions of all the above embodiments, the electronic product at least has all beneficial effects brought by the technical solutions of the above embodiments, and details are not repeated herein.
Based on the battery management control system which comprises the sampling circuit, the first switch circuit and the second switch circuit, wherein the sampling circuit is respectively connected with the first switch circuit and the second switch circuit, and the first switch circuit is connected with the second switch circuit, the embodiment of the battery management control method is provided.
Referring to fig. 4, fig. 4 is a flowchart illustrating a battery management control method according to a first embodiment of the present invention.
In a first embodiment, the battery management control method includes the steps of:
step S10, the sampling circuit collects the current value and the voltage value input into the battery management control system, and generates a first control signal when the current value is smaller than a first current threshold and/or the voltage value is smaller than a first voltage threshold, and generates a second control signal when the current value is larger than a second current threshold and/or the voltage value is larger than a second voltage threshold.
Specifically, in practical application, the current value and the voltage value input into the battery management control system and collected by the sampling circuit are mainly used for reflecting the current load condition of the battery management control system.
Accordingly, the above-mentioned generation of the first control signal when the current value is smaller than the first current threshold and/or the voltage value is smaller than the first voltage threshold may be generated when the load at the present moment is smaller than the minimum load threshold; the second control signal generated when the current value is greater than the second current threshold and/or the voltage value is greater than the second voltage threshold may be generated when the load at the present moment is greater than the maximum load threshold.
It should be understood that the above-mentioned minimum load threshold is a load threshold that can embody the above-mentioned first current threshold and first voltage threshold in practical applications.
Accordingly, the maximum load threshold is a load threshold that can represent the second current threshold and the second voltage threshold in practical applications.
In addition, the above-mentioned "first" of the "first current threshold value" and the "first voltage threshold value" and the "second" of the "second current threshold value" and the "second voltage threshold value" are merely differences for distinguishing the current threshold value and the voltage threshold value used for generating the first control signal and the second control signal.
Accordingly, the "first" of the "first control signal" and the "second" of the "second control signal" are also used only for distinguishing whether the two control signals are used for controlling different switching circuits to perform charging operation or discharging operation.
In addition, since the actual application scenarios of the battery management control system are different, the minimum load threshold and the maximum load threshold supported by the battery management control system can be set by those skilled in the art as needed, and are not limited herein.
And step S20, the first switch circuit controls the charging operation or the discharging operation of the battery connected with the battery management control system when receiving the first control signal.
Specifically, the first switch circuit in this embodiment is substantially composed of a plurality of N-Metal-Oxide-Semiconductor field effect transistors (NMOS transistors) and/or a plurality of P-Metal-Oxide-Semiconductor field effect transistors (PMOS transistors).
In addition, at least one anti-overcharge MOS tube and at least one anti-overdischarge MOS tube are required to be arranged in the plurality of MOS tubes forming the first switching circuit.
Therefore, when the first control signal is received, if it is determined that the battery needs to be charged currently according to the first control signal, the overcharge prevention MOS tube in the first switch circuit controls the battery to be charged, so as to avoid the overcharge of the battery.
Correspondingly, when the first control signal is received, if the battery is determined to be required to be discharged at present according to the first control signal, the over-discharge prevention MOS tube in the first switch circuit controls the battery to be discharged, and therefore the phenomenon that the battery sends over-discharge is avoided.
In addition, it is worth mentioning that, because the battery management control system is at the moment of starting, or because the current and the voltage are interfered by the outside at a certain moment, the situation that the instantaneous current and/or the instantaneous voltage are too large can occur, in order to avoid the situation that when the situation occurs, the large current and/or the large voltage passes through the first switch circuit, and then the MOS transistor in the first switch circuit is burnt out, a power resistor can be connected in series between the first switch circuit and the second switch circuit.
Namely, when the acquired current value is greater than a third current threshold value and/or the voltage value is greater than a third voltage threshold value (a phenomenon of instantaneous large current and/or large voltage occurs), the power resistor shunts the current value and/or divides the voltage value, and accordingly an MOS (metal oxide semiconductor) tube in the first switching circuit is prevented from being burnt out.
It should be noted that, regarding the resistance value of the power resistor, a person skilled in the art may select the resistance value according to an application scenario of the battery management control system, and the disclosure is not limited herein.
In addition, in practical applications, in order to ensure that the first control signal can drive the first switch circuit to control the charging operation or the discharging operation of the battery, a driving circuit may be further disposed between the sampling circuit and the first switch circuit, and the driving circuit amplifies the first control signal, so as to ensure that the first control signal can drive the first switch circuit to control the charging operation or the discharging operation of the battery when receiving the first control signal.
In addition, it is worth mentioning that the first switch circuit is composed of a plurality of anti-overcharge MOS tubes and a plurality of anti-overdischarge MOS tubes. Therefore, in practical application, in order to ensure that each anti-overcharge MOS transistor and each anti-overdischarge MOS transistor can be driven as required, the driving circuit may be composed of driving resistors with the number equal to the sum of the number of the anti-overcharge MOS transistors and the number of the anti-overdischarge MOS transistors, that is, each anti-overcharge MOS transistor corresponds to one driving resistor, and each anti-overdischarge MOS transistor corresponds to one driving resistor.
Furthermore, in order to ensure the accuracy of the driving operation, a plurality of anti-interference capacitors connected in parallel with the first switch circuit can be further arranged in the battery management control system, and the electromagnetic interference information in the first control signal is filtered by the anti-interference capacitors, so that the accuracy of the driving effect is ensured.
In step S30, the second switch circuit controls a charging operation or a discharging operation of the battery upon receiving the second control signal.
Specifically, the second switch circuit in this embodiment is substantially a relay capable of supporting the passage of a large current and a large voltage.
In addition, in order to ensure that the battery management control system can realize the effect of low energy consumption, the relay needs to select a normally open relay (also called a dynamic relay or an H-type relay), namely two contacts are disconnected when a coil is not electrified, and the two contacts are closed after the coil is electrified, so that a second switch circuit acted by the relay does not work in the initial starting state of the battery management control system, and is closed and conducted only when a second control signal is received, thereby greatly reducing unnecessary energy consumption.
As can be easily found from the above description, in the battery management control method provided in this embodiment, when the sampling circuit detects that the load currently borne by the battery management control system is small (the current value is smaller than the first current threshold and/or the voltage value is smaller than the first voltage threshold), the sampling circuit generates the first control signal for controlling the first switch circuit to operate, so that the second switch circuit in the battery management control system is turned off, the first switch circuit is turned on, and the first switch circuit with low energy consumption controls the charging/discharging operation of the battery connected to the battery management control system, so that the energy consumption in the whole charging/amplifying process is greatly reduced.
In addition, when the sampling circuit detects that the load currently borne by the battery management control system is large (the current value is larger than the second current threshold value and/or the voltage value is larger than the second voltage threshold value), the sampling circuit generates a second control signal for controlling the second switch circuit to work, so that the second switch circuit in the battery management control system is conducted, the first switch circuit is bypassed by the second switch circuit, and the second switch circuit capable of supporting large current and large voltage controls the charging/discharging operation of the battery connected with the battery management control system, so that the battery management control system can be compatible with the charging/discharging operation of large current and large voltage.
In addition, it should be noted that, since the battery management control method provided in this embodiment is applied to any battery management control system of the present invention, technical details that are not described in detail in this embodiment may be referred to the battery management control system provided in any embodiment of the present invention, and details are not described here.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or system that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or system. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or system that comprises the element.
The above-mentioned serial numbers of the embodiments of the present invention are merely for description and do not represent the merits of the embodiments.
Through the above description of the embodiments, those skilled in the art will clearly understand that the method of the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but in many cases, the former is a better implementation manner. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium (e.g., ROM/RAM, magnetic disk, optical disk) as described above and includes instructions for enabling a terminal device (e.g., a mobile phone, a computer, a server, an air conditioner, or a network device) to execute the method according to the embodiments of the present invention.
The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (10)
1. A battery management control system, the system comprising: the circuit comprises a sampling circuit, a first switch circuit and a second switch circuit; the sampling circuit is respectively connected with the first switch circuit and the second switch circuit, and the first switch circuit is connected with the second switch circuit; wherein,
the sampling circuit is used for acquiring a current value and a voltage value which are input into the battery management control system, generating a first control signal when the current value is smaller than a first current threshold value and/or the voltage value is smaller than a first voltage threshold value, and generating a second control signal when the current value is larger than a second current threshold value and/or the voltage value is larger than a second voltage threshold value;
the first switch circuit is used for controlling the charging operation or the discharging operation of a battery connected with the battery management control system when receiving the first control signal;
the second switch circuit is used for controlling the charging operation or the discharging operation of the battery when receiving the second control signal.
2. The system of claim 1, further comprising a power resistor connected in series between the first switching circuit and the second switching circuit; wherein,
the power resistor is used for shunting the current value and/or dividing the voltage value when the current value is larger than a third current threshold value and/or the voltage value is larger than a third voltage threshold value.
3. The system of claim 1, further comprising a drive circuit;
the driving circuit is used for amplifying the first control signal so that the first control signal can drive the first switch circuit to control the charging operation or the discharging operation of the battery when receiving the first control signal.
4. The system of claim 1, further comprising an immunity capacitor, said immunity resistor being connected in parallel with said first switching circuit; wherein,
the anti-interference circuit is used for filtering electromagnetic interference information of the first control signal.
5. The system of any of claims 1 to 4, wherein the first switching circuit comprises at least one anti-overcharge MOSFET and at least one anti-overdischarge MOSFET;
the anti-overcharging MOS tube is used for controlling the charging operation of the battery when receiving the first control signal;
and the over-discharge prevention MOS tube is used for controlling the discharge operation of the battery when receiving the first control signal.
6. The system of any of claims 1 to 4, wherein the second switching circuit is a normally open relay.
7. The system of any one of claims 1 to 4, wherein the sampling circuit is a sampling resistor or a Hall sensor.
8. A battery management control method applied to the battery management control system according to any one of claims 1 to 7; the system comprises: the circuit comprises a sampling circuit, a first switch circuit and a second switch circuit; the sampling circuit is respectively connected with the first switch circuit and the second switch circuit, and the first switch circuit is connected with the second switch circuit;
the battery management control method comprises the following steps:
the sampling circuit collects a current value and a voltage value input into the battery management control system, generates a first control signal when the current value is smaller than a first current threshold value and/or the voltage value is smaller than a first voltage threshold value, and generates a second control signal when the current value is larger than a second current threshold value and/or the voltage value is larger than a second voltage threshold value;
the first switch circuit controls the charging operation or the discharging operation of a battery connected with the battery management control system when receiving the first control signal;
the second switching circuit controls a charging operation or a discharging operation of the battery upon receiving the second control signal.
9. A battery management control apparatus characterized by comprising the battery management control system according to any one of claims 1 to 7.
10. An electronic product characterized by comprising the battery management control apparatus according to claim 9.
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| CN201910743492.6A CN110429681A (en) | 2019-08-08 | 2019-08-08 | Battery management control system, method, apparatus and electronic product |
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| CN201910743492.6A CN110429681A (en) | 2019-08-08 | 2019-08-08 | Battery management control system, method, apparatus and electronic product |
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Application publication date: 20191108 |