CN114498815B - Inductance type active equalization unit and hardware indication circuit thereof - Google Patents
Inductance type active equalization unit and hardware indication circuit thereof Download PDFInfo
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- CN114498815B CN114498815B CN202111624306.0A CN202111624306A CN114498815B CN 114498815 B CN114498815 B CN 114498815B CN 202111624306 A CN202111624306 A CN 202111624306A CN 114498815 B CN114498815 B CN 114498815B
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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
- H02J7/0013—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries acting upon several batteries simultaneously or sequentially
- H02J7/0014—Circuits for equalisation of charge between batteries
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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
- H01M10/4207—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells for several batteries or cells simultaneously or sequentially
-
- 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
- H02J7/0013—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries acting upon several batteries simultaneously or sequentially
- H02J7/0014—Circuits for equalisation of charge between batteries
- H02J7/0016—Circuits for equalisation of charge between batteries using shunting, discharge or bypass circuits
-
- 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
- H02J7/0013—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries acting upon several batteries simultaneously or sequentially
- H02J7/0014—Circuits for equalisation of charge between batteries
- H02J7/0019—Circuits for equalisation of charge between batteries using switched or multiplexed charge circuits
-
- 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
- H02J7/0047—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with monitoring or indicating 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
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- Engineering & Computer Science (AREA)
- Power Engineering (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 embodiment of the invention provides an inductive active equalization unit and a hardware indication circuit thereof, belonging to the technical field of active equalization units. The hardware indication circuit comprises a switch state detection circuit, wherein the switch state detection circuit comprises a first resistor, and one end of the first resistor is connected with one end of a first switch of the equalization unit. According to the inductive active equalization unit and the hardware indication circuit thereof, the switch state detection circuit is connected with the equalization unit, the first NOT gate outputs the first switch indication signal, the second NOT gate outputs the second switch indication signal, the charge-discharge state detection circuit determines the charge-discharge state of the equalization unit according to the first switch indication signal and the second switch indication signal, and finally the charge-discharge state of the equalization unit is displayed through the charge-discharge LED indication circuit.
Description
Technical Field
The invention relates to the technical field of active equalization units, in particular to an inductive active equalization unit and a hardware indication circuit thereof.
Background
Active balancing techniques based on inductive active balancing have been widely used in Battery Management Systems (BMS), which mainly transfer high cell energies to low cell capacities or supplement the cell minimum cells with the entire set of capacities.
However, when the equalization unit works, the working state of the equalization unit can only be known by reading the corresponding variable from the program, which must require the algorithm source code of the BMS to be owned and the meaning of the variable in the code to be familiar, and in the daily maintenance or teaching demonstration of the battery pack, such a condition is not usually provided, so that it is difficult to know the active equalization process.
The present inventors have found that the above-described solution of the prior art has the drawback that it is difficult to learn about the active equalization process in the course of implementing the present application.
Disclosure of Invention
The embodiment of the invention aims to provide an inductive active equalization unit and a hardware indication circuit thereof, which can obtain the charge and discharge states of battery strings to be equalized in the equalization unit.
In order to achieve the above object, an aspect of an embodiment of the present invention provides a hardware indication circuit of an inductive active equalization unit, including:
a switch state detection circuit, the switch state detection circuit comprising:
one end of the first resistor is connected with one end of a first switch of the equalization unit;
the input end of the first NOT gate is connected with the other end of the first resistor, and the output end of the first NOT gate is used for outputting a first switch indication signal;
One end of the second resistor is connected with one end of a second switch of the equalizing unit;
An absolute value circuit for performing an absolute value calculation operation on a potential signal of one end of the second switch, one end of the absolute value circuit being connected to the other end of the second resistor;
one end of the third resistor is connected with the other end of the absolute value circuit;
The input end of the second NOT gate is connected with the other end of the third resistor, and the output end of the second NOT gate is used for outputting a second switch indication signal;
the charge and discharge state detection circuit is connected with the switch state detection circuit and is used for detecting the charge and discharge state of the equalization unit;
And the charge-discharge LED indication circuit is connected with the switch state detection circuit and the charge-discharge state detection circuit and is used for displaying the charge-discharge state of the equalization unit.
Optionally, the absolute value circuit includes:
The negative electrode input end of the first operational amplifier is connected with the other end of the second resistor, the positive electrode input end of the first operational amplifier is grounded, and the negative electrode input end of the first operational amplifier is connected with the output end of the first operational amplifier;
The positive electrode input end of the second operational amplifier is connected with the output end of the first operational amplifier, the positive electrode input end of the second operational amplifier is connected with the output end of the second operational amplifier, and the output end of the second operational amplifier is connected with one end of the third resistor.
Optionally, the absolute value circuit further includes a first diode, an input end of the first diode is connected with an output end of the first operational amplifier, and an output end of the first diode is connected with an anode input end of the second operational amplifier.
Optionally, the charge-discharge state detection circuit includes:
The input end of the OR gate is used for receiving the first switch indication signal and the second switch indication signal;
The first D trigger enabling end is used for receiving the first switch indication signal, the clock end of the first D trigger is connected with the output end of the OR gate, and the output end of the first D trigger is used for outputting a first charge-discharge signal;
the second D trigger enabling end is used for receiving the second switch indication signal, the clock end of the second D trigger is connected with the output end of the OR gate, and the output end of the second D trigger is used for outputting a second charge-discharge signal.
Optionally, the charge-discharge LED indication circuit includes:
The input end of the third NOT gate is used for receiving the second switch indication signal;
The input end of the fourth NOT gate is used for receiving the second charge and discharge signals;
the input end of the first AND gate is connected with the output end of the third NOT gate and the output end of the fourth NOT gate, and the first AND gate is used for receiving the first switch indication signal and the first charge-discharge signal;
one end of the fourth resistor is connected with the output end of the first AND gate;
and one end of the first indicator lamp is connected with the other end of the fourth resistor, and the other end of the first indicator lamp is grounded.
Optionally, the charge-discharge LED indication circuit further includes:
The input end of the second AND gate is connected with the output end of the third NOT gate, and the second AND gate is used for receiving the first switch indication signal, the second switch indication signal and the first charge and discharge signal;
one end of the fifth resistor is connected with the output end of the second AND gate;
one end of the second indicator lamp is connected with the other end of the fifth resistor, and the other end of the second indicator lamp is grounded.
Optionally, the charge-discharge LED indication circuit further includes:
a fifth NOT gate, the input end is used for receiving the first switch indication signal;
The input end of the sixth NOT gate is used for receiving the first charge and discharge signals;
The input end of the third AND gate is connected with the output ends of the fifth NOT gate and the sixth NOT gate, and the third AND gate is used for receiving the second switch indication signal, the first charge and discharge signal and the second charge and discharge signal;
One end of the sixth resistor is connected with the output end of the third AND gate;
And one end of the third indicator lamp is connected with the other end of the sixth resistor, and the other end of the third indicator lamp is grounded.
Optionally, the charge-discharge LED indication circuit further includes:
The input end of the fourth AND gate is connected with the output end of the fifth NOT gate, and the fourth AND gate is used for receiving the first switch indication signal, the second switch indication signal and the second charge and discharge signal;
One end of the seventh resistor is connected with the output end of the fourth AND gate;
And one end of the fourth indicator lamp is connected with the other end of the seventh resistor, and the other end of the fourth indicator lamp is grounded.
In another aspect, the present invention also provides an inductive active equalization unit, including:
an equalizing unit circuit;
A hardware indication circuit as claimed in any preceding claim.
According to the technical scheme, the inductive active equalization unit and the hardware indication circuit thereof provided by the invention have the advantages that the switch state detection circuit is connected with the equalization unit, the first NOT gate outputs the first switch indication signal, the second NOT gate outputs the second switch indication signal, the charge-discharge state detection circuit determines the charge-discharge state of the equalization unit according to the first switch indication signal and the second switch indication signal, and finally the charge-discharge state of the equalization unit is displayed through the charge-discharge LED indication circuit.
Additional features and advantages of embodiments of the invention will be set forth in the detailed description which follows.
Drawings
The accompanying drawings are included to provide a further understanding of embodiments of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain, without limitation, the embodiments of the invention. In the drawings:
Fig. 1 is a circuit diagram of a hardware indication circuit of an inductive active equalization unit according to an embodiment of the present invention;
Fig. 2 is a circuit diagram of an absolute value circuit in a hardware indication circuit of an inductive active equalization unit according to an embodiment of the present invention;
Fig. 3 is a circuit diagram of a charge-discharge state detection circuit in a hardware indication circuit of an inductive active equalization unit according to an embodiment of the present invention;
Fig. 4 is a circuit diagram of a charge-discharge LED indication circuit in a hardware indication circuit of an inductive active equalization unit according to an embodiment of the present invention;
FIG. 5 is an enlarged schematic view of area A of FIG. 4;
FIG. 6 is an enlarged schematic view of region B of FIG. 4;
Fig. 7 is an enlarged schematic view of region C in fig. 4.
Description of the reference numerals
R1, a first resistor R2 and a second resistor
R3, third resistor R4 and fourth resistor
R5, fifth resistor R6 and sixth resistor
R7, seventh resistor N1, first NOT gate
N2, second NOT gate N3, third NOT gate
N4, fourth not gate N5, fifth not gate
N6, sixth NOT gate U1, first operational amplifier
U2, second operational amplifier D1, first diode
D2, second diode D3, third diode
O1, OR gate Q1, first D flip-flop
Q2, second D trigger LED1 and first indicator lamp
LED2, second indicator light LED3 and third indicator light
LED4, fourth indicator light A1, first AND gate
A2, second AND gate A3, third AND gate
A4, fourth AND gate V1, first battery string
V2, second battery string 01 and switch state detection circuit
02. Charge-discharge state detection circuit 03 and charge-discharge LED indication circuit
04. Absolute value circuit 05, equalizing unit
S1, a first switch S2 and a second switch
L, energy transfer inductance Signal1, first switch indication Signal
Signal2, second switch indication Signal SignalQ, first charge/discharge Signal
SignalQ 2a second charge-discharge signal
Detailed Description
The following describes the detailed implementation of the embodiments of the present invention with reference to the drawings. It should be understood that the detailed description and specific examples, while indicating and illustrating the invention, are not intended to limit the invention.
Fig. 1 is a circuit diagram of a hardware indication circuit of an inductive active equalization unit according to an embodiment of the present invention. In fig. 1, the hardware indicating circuit may include a switch state detecting circuit 01, a charge-discharge state detecting circuit 02, and a charge-discharge LED indicating circuit 03. Specifically, the switch detection circuit may include a first resistor R1, a first not gate N1, a second resistor R2, an absolute value circuit 04, a third resistor R3, and a second not gate N2.
One end of the first resistor R1 is connected with one end of a first switch S1 of the equalization unit 05, the input end of the first NOT gate N1 is connected with the other end of the first resistor R1, the output end of the first NOT gate N1 is used for outputting a first switch indication Signal Signal1, one end of the second resistor R2 is connected with one end of a second switch S2 of the equalization unit 05, the absolute value circuit 04 is used for performing absolute value calculation operation on a potential Signal of one end of the second switch S2, one end of the absolute value circuit 04 is connected with the other end of the second resistor R2, one end of the third resistor R3 is connected with the other end of the absolute value circuit 04, the input end of the second NOT gate N2 is connected with the other end of the third resistor R3, the output end of the second NOT gate N2 is used for outputting a second switch indication Signal Signal2, the charge and discharge state detection circuit 02 is connected with the switch state detection circuit 01 and used for detecting the charge and discharge state of the equalization unit 05, and the charge and discharge LED indication circuit 03 is connected with the switch state detection circuit 01 and the charge and discharge state detection circuit 02 and is used for displaying the charge and discharge state of the equalization unit 05.
When the equalization unit 05 does not perform equalization, the first switch S1 and the second switch S2 are both turned off, the second diode D2 and the third diode D3 are not freewheels, and at this time, the output of the first switch indication Signal1 and the output of the second switch indication Signal2 are both 0, and the state is the initial state. When the equalization unit 05 performs equalization, the first battery string V1 charges the second battery string V2 and the second battery string V2 charges the first battery string V1.
When the first battery string V1 charges the second battery string V2, if the first switch S1 is closed, the first battery string V1 charges the energy transfer inductor L, at this time, the second switch S2 is opened, and neither the second diode D2 nor the third diode D3 follow current. The first switch S1 is closed, so that the voltage of the positive electrode of the first battery string V1 relative to GND is low, the voltage is divided by the first resistor R1 and then input into the first not gate N1, and finally the first not gate N1 outputs the first switch indication Signal1 as 1, the second switch S2 is opened and the third diode D3 does not follow current, so that the voltage of the negative electrode of the second battery string V2 relative to GND is negative high, the voltage is converted into positive high after Signal conditioning by the absolute value circuit 04, and the second not gate N2 outputs the second switch indication Signal2 as 0.
When the first battery string V1 charges the second battery string V2, if the first switch S1 is turned off, the energy transfer inductance L charges the second battery string V2, at this time, the second switch S2 is turned off, the third diode D3 is freewheeling, and the second diode D2 is not freewheeling. The first switch S1 is turned off and the second diode D2 is not freewheeled, so that the voltage of the positive electrode of the first battery string V1 with respect to GND is high, the voltage is divided by the first resistor R1 and then input into the first not gate N1, the first switch indication Signal1 is output by the first not gate N1 as 0, the voltage of the negative electrode of the third diode D3 is freewheeled, so that the voltage of the negative electrode of the second battery string V2 with respect to GND is low, the voltage is still low after Signal conditioning by the absolute value circuit 04, and the second switch indication Signal2 is output as 1 after the second not gate N2.
When the second battery string V2 charges the first battery string V1, if the second switch S2 is closed, the second battery string V2 charges the energy transfer inductor L, and at this time, the first switch S1 is opened, and neither the second diode D2 nor the third diode D3 follow current. The first switch S1 is turned off and the second diode D2 is not freewheeling, so that the voltage of the positive electrode of the first battery string V1 with respect to GND is high, the voltage is divided by the first resistor R1 and then input to the first not gate N1, the first switch indication Signal1 is output by the first not gate N1 as 0, the second switch S2 is turned on, so that the voltage of the negative electrode of the second battery string V2 with respect to GND is low, the voltage is still low after Signal conditioning by the absolute value circuit 04, and the second switch indication Signal2 is output as 1 after the second not gate N2.
When the second battery string V2 charges the first battery string V1, if the second switch S2 is turned off, the energy transfer inductance L charges the first battery string V1, and at this time, the first switch S1 is turned off, the second diode D2 is freewheeling, and the third diode D3 is not freewheeling. The second diode D2 freewheels, so the voltage of the positive electrode of the first battery string V1 relative to GND is low, the voltage is divided by the first resistor R1 and then input into the first not gate N1, the first not gate N1 outputs the first switch indication Signal1 as 1, the second switch S2 is turned off and the third diode D3 does not freewheel, so the voltage of the negative electrode of the second battery string V2 relative to GND is negative high, the voltage is converted into positive high after Signal conditioning by the absolute value circuit 04, and the second not gate N2 outputs the second switch indication Signal2 as 0.
When the traditional equalization unit works, the working state of the equalization unit can be obtained only by reading corresponding variables from the program, so that the equalization process of the equalization unit is difficult to obtain in daily maintenance or teaching demonstration of the battery pack. In this embodiment of the present invention, the switch detection circuit 01 is used to detect the first switch S1 and the second switch S2 in the equalization unit 05, and the charge and discharge state detection circuit 02 determines the charge and discharge state of the equalization unit 05, and the charge and discharge LED indication circuit 03 displays the charge and discharge state of the equalization unit 05, so as to obtain the equalization process of the equalization unit 05, so as to facilitate the daily maintenance or teaching demonstration of the battery pack. The hardware indication circuit has high portability and strong applicability, and can accurately display the charge and discharge states of the equalization units.
In this embodiment of the present invention, as shown in fig. 2 and 5, the absolute value circuit may include a first operational amplifier U1 and a second operational amplifier U2.
The negative electrode input end of the first operational amplifier U1 is connected with the other end of the second resistor R2, the positive electrode input end of the first operational amplifier U1 is grounded, the negative electrode input end of the first operational amplifier U1 is connected with the output end of the first operational amplifier U1, the positive electrode input end of the second operational amplifier U2 is connected with the output end of the second operational amplifier U2, and the output end of the second operational amplifier U2 is connected with one end of the third resistor R3.
When the second switch S2 is turned off and the third diode D3 is not freewheeling, the voltage of the negative electrode of the second battery string V2 with respect to GND is at a negative high level, the negative high level is converted into a positive high level by the first operational amplifier U1, the positive high level is directly transmitted to the input end of the second not gate N2 through the third resistor R3, and finally the output signal transmitted through the second not gate N2 is at a low level. When the second switch S2 is closed or the third diode D3 freewheels, the voltage of the negative electrode of the second battery string V2 with respect to GND is low, the low level is amplified by the second operational amplifier U2, and then divided by the third resistor R3 to the input end of the second not gate N2, and finally the output signal of the second not gate N2 is high.
In this embodiment of the present invention, as shown in fig. 3 and 6, the charge-discharge state detection circuit 02 may include an or gate O1, a first D flip-flop Q1, and a second D flip-flop Q2.
The input end of the OR gate O1 is used for receiving a first switch indication Signal Signal1 and a second switch indication Signal Signal2, the enabling end of the first D trigger Q1 is used for receiving the first switch indication Signal Signal1, the clock end of the first D trigger Q1 is connected with the output end of the OR gate O1, the output end of the first D trigger Q1 is used for outputting a first charge and discharge Signal SignalQ1, the enabling end of the second D trigger Q2 is used for receiving the second switch indication Signal Signal2, the clock end of the second D trigger Q2 is connected with the output end of the OR gate O1, and the output end of the second D trigger Q2 is used for outputting a second charge and discharge Signal SignalQ2.
In this embodiment of the present invention, the Q non-terminals of the first D flip-flop Q1 and the second D flip-flop Q are connected to the D terminal, thereby forming a T flip-flop.
When the first battery string V1 charges the second battery string V2, the first switch indication Signal Signal1 is 0, the second switch indication Signal Signal2 is 0, the first charge/discharge Signal SignalQ is 0, and the second charge/discharge Signal SignalQ2 in the initial state. When the first battery string V1 charges the energy transfer inductance L, the first switch indication Signal1 is 1, the second switch indication Signal2 is 0, the enabling end of the first D flip-flop Q1 changes from 0 to 1, a positive jump occurs, the first D flip-flop Q1 outputs the first charge/discharge Signal SignalQ to 1, the enabling end of the second D flip-flop Q2 remains unchanged, and the second D flip-flop Q2 outputs the second charge/discharge Signal SignalQ to 0. When the energy transfer inductor L charges the second battery string V2, the first switch indication Signal1 is 0, the second switch indication Signal2 is 1, the enable end of the first D flip-flop Q1 changes from 1 to 0, a negative jump occurs, the first D flip-flop Q1 outputs the first charge/discharge Signal SignalQ to 1, the enable end of the second D flip-flop Q2 changes from 0 to 1, a positive jump occurs, and the second D flip-flop Q2 outputs the second charge/discharge Signal SignalQ to 1. When returning to the initial state, the first switch indication Signal1 and the second switch indication Signal2 are both 0, the first switch indication Signal1 and the second switch indication Signal2 are output through the or gate O1 to obtain the clear Signal, at this time, the first D flip-flop Q1 outputs the first charge/discharge Signal SignalQ as 0, and the second D flip-flop Q2 outputs the second charge/discharge Signal SignalQ as 0.
When the second battery string V2 charges the second battery string V1, in the initial state, the first switch indication Signal Signal1 is 0, the second switch indication Signal Signal2 is 0, the first charge/discharge Signal SignalQ is 0, and the second charge/discharge Signal SignalQ2. When the second battery string V2 charges the energy transfer inductance L, the first switch indication Signal1 is 0, the second switch indication Signal2 is 1, the enabling end of the first D flip-flop Q1 is kept unchanged, the first D flip-flop Q1 outputs the first charge/discharge Signal SignalQ as 0, the enabling end of the second D flip-flop Q2 is changed from 0 to 1, positive jump occurs, and the second D flip-flop Q2 outputs the second charge/discharge Signal SignalQ as 0. When the energy transfer inductor L charges the first battery string V1, the first switch indication Signal1 is 1, the second switch indication Signal2 is 0, the enabling end of the first D flip-flop Q1 changes from 0 to 1, positive jump occurs, the first D flip-flop Q1 outputs the first charge/discharge Signal SignalQ to 1, the enabling end of the second D flip-flop Q2 changes from 1 to 0, negative jump occurs, and the second D flip-flop Q2 outputs the second charge/discharge Signal SignalQ to 1. When returning to the initial state, the first switch indication Signal1 and the second switch indication Signal2 are both 0, the first switch indication Signal1 and the second switch indication Signal2 are output through the or gate O1 to obtain the clear Signal, at this time, the first D flip-flop Q1 outputs the first charge/discharge Signal SignalQ as 0, and the second D flip-flop Q2 outputs the second charge/discharge Signal SignalQ as 0.
In summary, the state table of the first battery string V1 when the second battery string V2 is charged may be shown in table 1, and the state table of the second battery string V2 when the first battery string V1 is charged may be shown in table 2.
Table 1 charge state table of first battery string V1 to second battery string V2
Table 2 charge state table of the second battery string V2 to the first battery string V1
| Signal 1 | Signal 2 | Signal Q1 | Signal Q2 | |
| Initial state | 0 | 0 | 0 | 0 |
| V2 discharge to L | 0 | 1 | 0 | 1 |
| L charges to V1 | 1 | 0 | 1 | 1 |
| Returning to the initial state | 0 | 0 | 0 | 0 |
In this embodiment of the present invention, as shown in fig. 4 and 7, the charge/discharge LED indicating circuit 03 may include a third not gate N3, a fourth not gate N4, a first and gate A1, a fourth resistor R4, and a first indicator lamp LED1.
The input end of the third NOT gate N3 is used for receiving a second switch indication Signal2, the input end of the fourth NOT gate N4 is used for receiving a second charge and discharge Signal Q2, the input end of the first AND gate A1 is connected with the output ends of the third NOT gate N3 and the fourth NOT gate N4, the first AND gate A1 is used for receiving the first switch indication Signal1 and the first charge and discharge Signal Q1, one end of the fourth resistor R4 is connected with the output end of the first AND gate A1, one end of the first indicator lamp LED1 is connected with the other end of the fourth resistor R4, and the other end of the first indicator lamp LED1 is grounded.
When the input of the first and gate A1 is at the high level, the first and gate A1 outputs the high level, and the first indicator LED1 is turned on. The second switch indication Signal2 and the second charge-discharge Signal Q2 must be input with low level to become high level after passing through the third not gate N3 and the fourth not gate N4 respectively, so the second switch indication Signal2 and the second charge-discharge Signal Q2 are 0; similarly, the first switch indication Signal1 and the first charge/discharge Signal Q1 are both 1, that is, the equalization unit 05 is in a state in which the first battery string V1 discharges the energy transfer inductance L.
In this embodiment of the present invention, as shown in fig. 4 and 7, the charge/discharge LED indicating circuit 03 may further include a second and gate A2, a fifth resistor R5, and a second indicator lamp LED2.
The input end of the second AND gate A2 is connected with the output end of the third NOT gate N3, the second AND gate A2 is used for receiving the first switch indication Signal Signal1, the second switch indication Signal Signal2 and the first charge and discharge Signal Signal Q1, one end of the fifth resistor R5 is connected with the output end of the second AND gate A2, one end of the second indicator light LED2 is connected with the other end of the fifth resistor R5, and the other end of the second indicator light LED2 is grounded.
When the second and gate A2 is at the high level, the second and gate A2 outputs the high level, and the second indicator LED2 is turned on. The second switch Signal2 must be input with a low level to become a high level after passing through the third not gate N3, so the second switch Signal2 is 0, and similarly, the first switch Signal1, the first charge-discharge Signal Q1 and the second charge-discharge Signal Q2 are all 1, that is, the equalization unit 05 is in a state in which the energy transfer inductance L charges the first battery string V1.
In this embodiment of the present invention, as shown in fig. 4 and 7, the charge/discharge LED indicating circuit 03 may further include a fifth not gate N5, a sixth not gate N6, a third and gate A3, a sixth resistor R6, and a third indicator lamp LED3.
The input end of the fifth NOT gate N5 is used for receiving a first switch indication Signal Signal1, the input end of the sixth NOT gate N6 is used for receiving a first charge and discharge Signal Signal Q1, the input end of the third AND gate A3 is connected with the output ends of the fifth NOT gate N5 and the sixth NOT gate N6, the third AND gate A3 is used for receiving a second switch indication Signal Signal2 and a second charge and discharge Signal Signal Q2, one end of the sixth resistor R6 is connected with the output end of the third AND gate A3, one end of the third indicator lamp LED3 is connected with the other end of the sixth resistor R6, and the other end of the third indicator lamp LED3 is grounded.
When the third and gate A3 is at the high level, the third and gate A3 outputs the high level, and the third indicator LED3 is turned on. The first switch indication Signal1 and the first charge/discharge Signal Q1 must be input with low level to become high level after passing through the fifth not gate N5 and the sixth not gate N6, respectively, so that the first switch indication Signal1 and the first charge/discharge Signal Q1 are 0, and similarly, the second switch indication Signal2 and the second charge/discharge Signal Q2 are 1, that is, the equalization unit 05 is in a discharge state of the second battery string V2 to the energy transfer inductor L.
In this embodiment of the present invention, as shown in fig. 4 and 7, the charge/discharge LED indicating circuit 03 may further include a fourth and gate A4, a seventh resistor R7, and a fourth indicator lamp LED4.
The input end of the fourth AND gate A4 is connected with the output end of the fifth NOT gate N5, the fourth AND gate A4 is used for receiving the first switch indication Signal Signal1, the second switch indication Signal Signal2 and the second charge/discharge Signal Signal Q2, one end of the seventh resistor R7 is connected with the output end of the fourth AND gate A4, one end of the fourth indicator light LED4 is connected with the other end of the seventh resistor R7, and the other end of the fourth indicator light LED4 is grounded.
When the fourth and gate A4 is at the high level, the fourth and gate A4 outputs the high level, and the fourth indicator LED4 is turned on. The first switch Signal1 must be input with a low level to be high after passing through the fifth not gate N5, so the first switch Signal1 is 0, and similarly the second switch Signal2, the first charge-discharge Signal Q1 and the second charge-discharge Signal Q2 are all 1, that is, the equalization unit 05 is in a state of charging the energy transfer inductance L to the second battery string V2.
When the first switch indication Signal, the second switch indication Signal2, the first charge and discharge Signal Q1 and the second charge and discharge Signal Q2 are all 0, the outputs of the first and gate A1, the second and gate A2, the third and gate A3 and the fourth and gate A4 are all low level, and the first indicator lamp LED1, the second indicator lamp LED2, the third indicator lamp LED3 and the fourth indicator lamp LED4 are not on.
In summary, the lighting logic of each indicator light can be shown in table 3.
Table 3 logical table for lighting each indicator lamp
On the other hand, the invention also provides an inductive active equalization unit. Specifically, the inductive active equalization unit may include an equalization unit circuit and a hardware indication circuit as described above. Specifically, as shown in fig. 4, the equalization unit circuit may include a first battery string V1, a second battery string V2, a second diode D2, a third diode D3, a first switch S1, a second switch S2, and an energy transfer inductance L.
The positive electrode of the first battery string V1 is connected with one end of the first switch S1, the positive electrode of the first battery string V1 is connected with the negative electrode of the second diode D2, the negative electrode of the second battery string V2 is connected with one end of the second switch S2, the negative electrode of the second battery string V2 is connected with the positive electrode of the third diode D3, the negative electrode of the first battery string V1 and the positive electrode of the second battery string V2 are both connected with one end of the energy transfer inductor L, the other end of the first switch S1, the other end of the second switch S2, the positive electrode of the second diode D2 and the negative electrode of the third diode D3 are all connected with the other end of the energy transfer inductor L, and the other end of the energy transfer inductor L is grounded.
In this embodiment of the invention, the supply voltage of the hardware indication circuit is 15V.
According to the technical scheme, the inductive active equalization unit and the hardware indication circuit thereof provided by the invention have the advantages that the switch state detection circuit 01 is connected with the equalization unit 05, the first NOT gate N1 outputs the first switch indication Signal 1, the second NOT gate N2 outputs the second switch indication Signal 2, the charge-discharge state detection circuit 02 determines the charge-discharge state of the equalization unit 05 according to the first switch indication Signal 1 and the second switch indication Signal 2, and finally the charge-discharge state of the equalization unit 05 is displayed through the charge-discharge LED indication circuit 03.
It should also be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus 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 apparatus. Without further limitation, an element defined by the phrase "comprising one does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises an element.
The foregoing is merely exemplary of the present application and is not intended to limit the present application. Various modifications and variations of the present application will be apparent to those skilled in the art. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the application are to be included in the scope of the claims of the present application.
Claims (8)
1. A hardware indication circuit of an inductive active equalization unit, comprising:
a switch state detection circuit (01), the switch state detection circuit (01) comprising:
one end of the first resistor is connected with one end of a first switch of the balancing unit (05);
the input end of the first NOT gate is connected with the other end of the first resistor, and the output end of the first NOT gate is used for outputting a first switch indication signal;
One end of the second resistor is connected with one end of a second switch of the balancing unit (05);
An absolute value circuit (04) for performing an absolute value calculation operation on a potential signal of one end of the second switch, one end of the absolute value circuit (04) being connected to the other end of the second resistor;
One end of the third resistor is connected with the other end of the absolute value circuit (04);
The input end of the second NOT gate is connected with the other end of the third resistor, and the output end of the second NOT gate is used for outputting a second switch indication signal;
a charge/discharge state detection circuit (02) connected to the switch state detection circuit (01) for detecting a charge/discharge state of the equalization unit (05);
a charge-discharge LED indication circuit (03) connected with the switch state detection circuit (01) and the charge-discharge state detection circuit (02) and used for displaying the charge-discharge state of the equalization unit (05);
The charge/discharge state detection circuit (02) includes:
The input end of the OR gate is used for receiving the first switch indication signal and the second switch indication signal;
The first D trigger enabling end is used for receiving the first switch indication signal, the clock end of the first D trigger is connected with the output end of the OR gate, and the output end of the first D trigger is used for outputting a first charge-discharge signal;
the second D trigger enabling end is used for receiving the second switch indication signal, the clock end of the second D trigger is connected with the output end of the OR gate, and the output end of the second D trigger is used for outputting a second charge-discharge signal.
2. The hardware indication circuit according to claim 1, wherein the absolute value circuit (04) comprises:
The negative electrode input end of the first operational amplifier is connected with the other end of the second resistor, the positive electrode input end of the first operational amplifier is grounded, and the negative electrode input end of the first operational amplifier is connected with the output end of the first operational amplifier;
The positive electrode input end of the second operational amplifier is connected with the output end of the first operational amplifier, the positive electrode input end of the second operational amplifier is connected with the output end of the second operational amplifier, and the output end of the second operational amplifier is connected with one end of the third resistor.
3. The hardware indication circuit according to claim 2, characterized in that the absolute value circuit (04) further comprises a diode, an input of which is connected to the output of the first operational amplifier, and an output of which is connected to the positive input of the second operational amplifier.
4. The hardware indication circuit according to claim 1, wherein the charge-discharge LED indication circuit (03) comprises:
The input end of the third NOT gate is used for receiving the second switch indication signal;
The input end of the fourth NOT gate is used for receiving the second charge and discharge signals;
the input end of the first AND gate is connected with the output end of the third NOT gate and the output end of the fourth NOT gate, and the first AND gate is used for receiving the first switch indication signal and the first charge-discharge signal;
one end of the fourth resistor is connected with the output end of the first AND gate;
and one end of the first indicator lamp is connected with the other end of the fourth resistor, and the other end of the first indicator lamp is grounded.
5. The hardware indication circuit according to claim 4, wherein the charge-discharge LED indication circuit (03) further comprises:
The input end of the second AND gate is connected with the output end of the third NOT gate, and the second AND gate is used for receiving the first switch indication signal, the second switch indication signal and the first charge and discharge signal;
one end of the fifth resistor is connected with the output end of the second AND gate;
one end of the second indicator lamp is connected with the other end of the fifth resistor, and the other end of the second indicator lamp is grounded.
6. The hardware indication circuit according to claim 4, wherein the charge-discharge LED indication circuit (03) further comprises:
a fifth NOT gate, the input end is used for receiving the first switch indication signal;
The input end of the sixth NOT gate is used for receiving the first charge and discharge signals;
The input end of the third AND gate is connected with the output ends of the fifth NOT gate and the sixth NOT gate, and the third AND gate is used for receiving the second switch indication signal and the second charge and discharge signal;
One end of the sixth resistor is connected with the output end of the third AND gate;
And one end of the third indicator lamp is connected with the other end of the sixth resistor, and the other end of the third indicator lamp is grounded.
7. The hardware indication circuit according to claim 6, wherein the charge-discharge LED indication circuit (03) further comprises:
The input end of the fourth AND gate is connected with the output end of the fifth NOT gate, and the fourth AND gate is used for receiving the first switch indication signal, the second switch indication signal and the second charge and discharge signal;
One end of the seventh resistor is connected with the output end of the fourth AND gate;
And one end of the fourth indicator lamp is connected with the other end of the seventh resistor, and the other end of the fourth indicator lamp is grounded.
8. An inductive active equalization unit, comprising:
an equalizing unit circuit;
a hardware indication circuit as claimed in any one of claims 1 to 7.
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108336809A (en) * | 2017-01-20 | 2018-07-27 | 硕天科技股份有限公司 | Uninterruptible power system capable of detecting battery equilibrium state |
| CN110879350A (en) * | 2019-12-20 | 2020-03-13 | 杭州协能科技股份有限公司 | Detection method of battery equalization circuit and battery management system |
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| JPH08265967A (en) * | 1995-03-20 | 1996-10-11 | Nissin Electric Co Ltd | Power supply balance detector |
| DE10346325A1 (en) * | 2003-10-06 | 2005-05-04 | Siemens Ag | Switching device for bidirectional charge equalization between energy stores |
| US7545176B2 (en) * | 2007-10-25 | 2009-06-09 | International Business Machines Corporation | Energy-saving circuit and method using charge equalization across complementary nodes |
| CN113472022B (en) * | 2020-03-31 | 2024-09-17 | 北京新能源汽车股份有限公司 | Battery pack active equalization system, control method and vehicle |
| CN113162143A (en) * | 2021-03-19 | 2021-07-23 | 力神动力电池系统有限公司 | Battery pack equalization circuit with odd-even control logic |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108336809A (en) * | 2017-01-20 | 2018-07-27 | 硕天科技股份有限公司 | Uninterruptible power system capable of detecting battery equilibrium state |
| CN110879350A (en) * | 2019-12-20 | 2020-03-13 | 杭州协能科技股份有限公司 | Detection method of battery equalization circuit and battery management system |
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