Inductive active balancing unit and its hardware indication circuit

Abstract

The embodiment of the present invention provides an inductive active balancing unit and a hardware indication circuit thereof, belonging to the technical field of active balancing units. The hardware indication circuit comprises: a switch state detection circuit, the switch state detection circuit comprises a first resistor, one end of the first resistor is connected to one end of a first switch of the balancing unit. The inductive active balancing unit and the hardware indication circuit thereof provided by the present invention are connected to the balancing unit by connecting the switch state detection circuit to the balancing unit, the first NOT gate outputs a first switch indication signal, the second NOT gate outputs a second switch indication signal, the charge and discharge state detection circuit determines the charge and discharge state of the balancing unit according to the first switch indication signal and the second switch indication signal, and finally displays the charge and discharge state of the balancing unit through the charge and discharge LED indication circuit. The hardware indication circuit has high portability and strong applicability, and can accurately display the charge and discharge state of the balancing unit.

Description

Technical Field

[0001] The present invention relates to the technical field of active equalizing units, and in particular to an inductive active equalizing unit and a hardware indication circuit thereof. Background Art

[0002] Active balancing technology based on inductive active balancing has been widely used in battery management systems (BMS). Active balancing mainly transfers the energy of a single cell with high energy to that of a single cell with low capacity, or uses the capacity of the entire group to supplement the lowest single cell.

[0003] However, when the balancing unit is working, the working status of the balancing unit can only be known by reading the corresponding variables from the program. This requires having the BMS algorithm source code and being familiar with the meaning of the variables in the code. In the daily maintenance or teaching demonstration of the battery pack, such conditions are usually not available, so it is difficult to know the active balancing process.

[0004] The inventors of the present application discovered during the process of implementing the present invention that the above-mentioned solution in the prior art has the defect that it is difficult to know the active equalization process. Summary of the invention

[0005] An object of the embodiments of the present invention is to provide an inductive active balancing unit and a hardware indication circuit thereof, wherein the inductive active balancing unit and the hardware indication circuit thereof can obtain the charge and discharge status of a battery string to be balanced in the balancing unit.

[0006] In order to achieve the above-mentioned object, an embodiment of the present invention provides a hardware indication circuit of an inductive active balancing unit, including:

[0007] A switch state detection circuit, the switch state detection circuit comprising:

[0008] A first resistor, one end of which is connected to one end of a first switch of the equalizing unit;

[0009] a first NOT gate, an input end of which is connected to the other end of the first resistor, and an output end of the first NOT gate is used to output a first switch indication signal;

[0010] a second resistor, one end of which is connected to one end of the second switch of the balancing unit;

[0011] an absolute value circuit, used for performing an absolute value calculation operation on a potential signal at one end of the second switch, wherein one end of the absolute value circuit is connected to the other end of the second resistor;

[0012] a third resistor, one end of which is connected to the other end of the absolute value circuit;

[0013] a second NOT gate, an input end of which is connected to the other end of the third resistor, and an output end of the second NOT gate is used to output a second switch indication signal;

[0014] A charge and discharge state detection circuit, connected to the switch state detection circuit, for detecting the charge and discharge state of the equalization unit;

[0015] The charge and discharge LED indication circuit is connected to the switch state detection circuit and the charge and discharge state detection circuit, and is used to display the charge and discharge state of the equalization unit.

[0016] Optionally, the absolute value circuit comprises:

[0017] a first operational amplifier, wherein a negative input terminal of the first operational amplifier is connected to the other end of the second resistor, a positive input terminal of the first operational amplifier is grounded, and a negative input terminal of the first operational amplifier is connected to an output terminal of the first operational amplifier;

[0018] A second operational amplifier, wherein the positive input terminal of the second operational amplifier is connected to the output terminal of the first operational amplifier, the positive input terminal of the second operational amplifier is connected to the output terminal of the second operational amplifier, and the output terminal of the second operational amplifier is connected to one end of the third resistor.

[0019] Optionally, the absolute value circuit further includes a first diode, an input end of the first diode is connected to an output end of the first operational amplifier, and an output end of the first diode is connected to a positive input end of the second operational amplifier.

[0020] Optionally, the charge and discharge state detection circuit includes:

[0021] An OR gate, wherein an input end of the OR gate is used to receive the first switch indication signal and the second switch indication signal;

[0022] a first D flip-flop, wherein an enable terminal of the first D flip-flop is used to receive the first switch indication signal, a clock terminal of the first D flip-flop is connected to an output terminal of the OR gate, and an output terminal of the first D flip-flop is used to output a first charge and discharge signal;

[0023] A second D flip-flop, wherein the enable terminal of the second D flip-flop is used to receive the second switch indication signal, the clock terminal of the second D flip-flop is connected to the output terminal of the OR gate, and the output terminal of the second D flip-flop is used to output a second charge and discharge signal.

[0024] Optionally, the charge and discharge LED indication circuit includes:

[0025] A third NOT gate, whose input terminal is used to receive the second switch indication signal;

[0026] a fourth NOT gate, whose input terminal is used to receive the second charge and discharge signal;

[0027] a first AND gate, whose input end is connected to both the output end of the third NOT gate and the output end of the fourth NOT gate, and the first AND gate is used to receive the first switch indication signal and the first charge and discharge signal;

[0028] a fourth resistor, one end of which is connected to the output end of the first AND gate;

[0029] A first indicator light, one end of the first indicator light is connected to the other end of the fourth resistor, and the other end of the first indicator light is grounded.

[0030] Optionally, the charge and discharge LED indication circuit further includes:

[0031] a second AND gate, whose input end is connected to the output end of the third NOT gate, and the second AND gate is used to receive the first switch indication signal, the second switch indication signal and the first charge and discharge signal;

[0032] a fifth resistor, one end of which is connected to the output end of the second AND gate;

[0033] A second indicator light, one end of the second indicator light is connected to the other end of the fifth resistor, and the other end of the second indicator light is grounded.

[0034] Optionally, the charge and discharge LED indication circuit further includes:

[0035] a fifth NOT gate, whose input terminal is used to receive the first switch indication signal;

[0036] a sixth NOT gate, whose input terminal is used to receive the first charge and discharge signal;

[0037] a third AND gate, whose input end is connected to the output ends of the fifth NOT gate and the sixth NOT gate, and the third AND gate is used to receive the second switch indication signal, the first charge and discharge signal, and the second charge and discharge signal;

[0038] a sixth resistor, one end of which is connected to the output end of the third AND gate;

[0039] A third indicator light, one end of the third indicator light is connected to the other end of the sixth resistor, and the other end of the third indicator light is grounded.

[0040] Optionally, the charge and discharge LED indication circuit further includes:

[0041] a fourth AND gate, whose input end is connected to the output end of the fifth NOT gate, and the fourth AND gate is used to receive the first switch indication signal, the second switch indication signal and the second charge-discharge signal;

[0042] a seventh resistor, one end of which is connected to the output end of the fourth AND gate;

[0043] A fourth indicator light, one end of the fourth indicator light is connected to the other end of the seventh resistor, and the other end of the fourth indicator light is grounded.

[0044] On the other hand, the present invention further provides an inductive active balancing unit, comprising:

[0045] Equalizing unit circuit;

[0046] A hardware indication circuit as described in any one of the above.

[0047] Through the above technical scheme, the inductive active balancing unit and its hardware indication circuit provided by the present invention connect the switch state detection circuit with the balancing unit, the first NOT gate outputs the first switch indication signal, the second NOT gate outputs the second switch indication signal, the charge and discharge state detection circuit determines the charge and discharge state of the balancing unit according to the first switch indication signal and the second switch indication signal, and finally displays the charge and discharge state of the balancing unit through the charge and discharge LED indication circuit. The hardware indication circuit has high portability and strong applicability, and can accurately display the charge and discharge state of the balancing unit.

[0048] Other features and advantages of the embodiments of the present invention will be described in detail in the subsequent detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0049] The accompanying drawings are used to provide a further understanding of the embodiments of the present invention and constitute a part of the specification. Together with the following specific implementations, they are used to explain the embodiments of the present invention, but do not constitute a limitation on the embodiments of the present invention. In the accompanying drawings:

[0050] Figure 1 is a circuit diagram of a hardware indication circuit of an inductive active balancing unit according to an embodiment of the present invention;

[0051] Figure 2 is a circuit diagram of an absolute value circuit in a hardware indication circuit of an inductive active balancing unit according to an embodiment of the present invention;

[0052] Figure 3 is a circuit diagram of a charge and discharge state detection circuit in a hardware indication circuit of an inductive active balancing unit according to an embodiment of the present invention;

[0053] Figure 4 is a circuit diagram of a charge and discharge LED indication circuit in a hardware indication circuit of an inductive active balancing unit according to an embodiment of the present invention;

[0054] Figure 5 yes Figure 4 A magnified schematic diagram of the middle A area;

[0055] Figure 6 yes Figure 4 A magnified schematic diagram of the middle B area;

[0056] Figure 7 yes Figure 4 Enlarged schematic diagram of area C in the middle.

[0057] Description of Reference Numerals

[0058] R1, first resistor R2, second resistor

[0059] R3, third resistor R4, fourth resistor

[0060] R5, fifth resistor R6, sixth resistor

[0061] R7, the seventh resistor N1, the first NOT gate

[0062] N2, second NOT gate N3, third NOT gate

[0063] N4, the fourth NOT gate N5, the fifth NOT gate

[0064] N6, sixth NOT gate U1, first operational amplifier

[0065] U2, second operational amplifier D1, first diode

[0066] D2, second diode D3, third diode

[0067] O1, OR gate Q1, first D flip-flop

[0068] Q2, second D flip-flop LED1, first indicator light

[0069] LED2, second indicator LED3, third indicator

[0070] LED4, fourth indicator light A1, first AND gate

[0071] A2, second AND gate A3, third AND gate

[0072] A4, fourth AND gate V1, first battery string

[0073] V2, second battery string 01, switch status detection circuit

[0074] 02. Charge and discharge status detection circuit 03. Charge and discharge LED indication circuit

[0075] 04. Absolute value circuit 05. Equalization unit

[0076] S1, first switch S2, second switch

[0077] L, energy transfer inductor Signal1, first switch indication signal

[0078] Signal2, second switch indication signal SignalQ1, first charge and discharge signal

[0079] SignalQ2, the second charge and discharge signal DETAILED DESCRIPTION

[0080] The specific implementation of the embodiment of the present invention is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described here is only used to illustrate and explain the embodiment of the present invention, and is not used to limit the embodiment of the present invention.

[0081] Figure 1 FIG. 1 is a circuit diagram of a hardware indication circuit of an inductive active balancing unit according to an embodiment of the present invention. Figure 1 In the embodiment, the hardware indication circuit may include a switch state detection circuit 01, a charge and discharge state detection circuit 02, and a charge and discharge LED indication 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.

[0082] One end of the first resistor R1 is connected to one end of the first switch S1 of the balancing unit 05; the input end of the first NOT gate N1 is connected to the other end of the first resistor R1, and the output end of the first NOT gate N1 is used to output the first switch indication signal Signal1; one end of the second resistor R2 is connected to one end of the second switch S2 of the balancing unit 05; the absolute value circuit 04 is used to perform an absolute value calculation operation on the potential signal at one end of the second switch S2, and one end of the absolute value circuit 04 is connected to the other end of the second resistor R2; one end of the third resistor R3 is connected to the other end of the absolute value circuit 04; the input end of the second NOT gate N2 is connected to the other end of the third resistor R3, and the output end of the second NOT gate N2 is used to output the second switch indication signal Signal2; the charge and discharge state detection circuit 02 is connected to the switch state detection circuit 01, and is used to detect the charge and discharge state of the balancing unit 05; the charge and discharge LED indication circuit 03 is connected to the switch state detection circuit 01 and the charge and discharge state detection circuit 02, and is used to display the charge and discharge state of the balancing unit 05.

[0083] When the balancing unit 05 is not balanced, the first switch S1 and the second switch S2 are both disconnected, the second diode D2 and the third diode D3 are not freewheeling, and the first switch indication signal Signal1 and the second switch indication signal Signal2 are both outputted as 0, which is the initial state. When the balancing unit 05 is balanced, there are two situations: the first battery string V1 charges the second battery string V2 and the second battery string V2 charges the first battery string V1.

[0084] 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, and at this time the second switch S2 is disconnected, and the second diode D2 and the third diode D3 are not freewheeling. The first switch S1 is closed, so the voltage of the positive electrode of the first battery string V1 relative to GND is low level, and after voltage division by the first resistor R1, it is input to the first NOT gate N1, and finally the first NOT gate N1 outputs the first switch indication signal Signal1 as 1; the second switch S2 is disconnected and the third diode D3 is not freewheeling, so the voltage of the negative electrode of the second battery string V2 relative to GND is a negative high level, which is converted into a positive high level after signal conditioning by the absolute value circuit 04, and then outputs the second switch indication signal Signal2 as 0 after passing through the second NOT gate N2.

[0085] When the first battery string V1 charges the second battery string V2, if the first switch S1 is disconnected, the energy transfer inductor L charges the second battery string V2, and at this time the second switch S2 is disconnected, the third diode D3 is continuous, and the second diode D2 is not continuous. The first switch S1 is disconnected and the second diode D2 is not continuous, so the voltage of the positive electrode of the first battery string V1 relative to GND is high level, and after the voltage is divided by the first resistor R1, it is input to the first NOT gate N1, and finally the first NOT gate N1 outputs the first switch indication signal Signal1 as 0; the third diode D3 is continuous, so the voltage of the negative electrode of the second battery string V2 relative to GND is low level, and after the absolute value circuit 04 performs signal conditioning, it is still low level, and then after the second NOT gate N2, the second switch indication signal Signal2 is output as 1.

[0086] 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 disconnected, and the second diode D2 and the third diode D3 are not freewheeling. The first switch S1 is disconnected and the second diode D2 is not freewheeling, so the voltage of the positive electrode of the first battery string V1 relative to GND is high level, and after voltage division by the first resistor R1, it is input to the first NOT gate N1, and finally the first NOT gate N1 outputs the first switch indication signal Signal1 as 0; the second switch S2 is closed, so the voltage of the negative electrode of the second battery string V2 relative to GND is low level, and after signal conditioning by the absolute value circuit 04, it is still low level, and then after passing through the second NOT gate N2, the second switch indication signal Signal2 is output as 1.

[0087] When the second battery string V2 charges the first battery string V1, if the second switch S2 is disconnected, the energy transfer inductor L charges the first battery string V1. At this time, the first switch S1 is disconnected, the second diode D2 is freewheeling, and the third diode D3 is not freewheeling. The second diode D2 is freewheeling, so the voltage of the positive electrode of the first battery string V1 relative to GND is low level, which is input into the first NOT gate N1 after voltage division by the first resistor R1, and finally the first NOT gate N1 outputs the first switch indication signal Signal1 as 1; the second switch S2 is disconnected and the third diode D3 is not freewheeling, so the voltage of the negative electrode of the second battery string V2 relative to GND is negative high level, which is converted into positive high level after signal conditioning by the absolute value circuit 04, and then outputs the second switch indication signal Signal2 as 0 after passing through the second NOT gate N2.

[0088] When the traditional balancing unit is working, the working state of the balancing unit can only be known by reading the corresponding variables from the program, which makes it difficult to know the balancing process of the balancing unit in the daily maintenance or teaching demonstration of the battery pack. In this embodiment of the present invention, the balancing process of the balancing unit 05 is obtained by using the switch detection circuit 01 to detect the first switch S1 and the second switch S2 in the balancing unit 05, the charge and discharge state detection circuit 02 to determine the charge and discharge state of the balancing unit 05, and the charge and discharge LED indication circuit 03 to display the charge and discharge state of the balancing 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 state of the balancing unit.

[0089] In this embodiment of the invention, Figure 2 and Figure 5 As shown, the absolute value circuit may include a first operational amplifier U1 and a second operational amplifier U2.

[0090] The negative input terminal of the first operational amplifier U1 is connected to the other end of the second resistor R2, the positive input terminal of the first operational amplifier U1 is grounded, and the negative input terminal of the first operational amplifier U1 is connected to the output terminal of the first operational amplifier U1; the positive input terminal of the second operational amplifier U2 is connected to the output terminal of the first operational amplifier U1, the positive input terminal of the second operational amplifier U2 is connected to the output terminal of the second operational amplifier U2, and the output terminal of the second operational amplifier U2 is connected to one end of the third resistor R3.

[0091] When the second switch S2 is disconnected and the third diode D3 is not freewheeling, the voltage of the cathode of the second battery string V2 relative to GND is a negative high level, which is converted into a positive high level by the first operational amplifier U1, and the positive high level is directly transmitted to the input end of the second NOT gate N2 via the third resistor R3, and finally the output signal of the second NOT gate N2 is a low level. When the second switch S2 is closed or the third diode D3 is freewheeling, the voltage of the cathode of the second battery string V2 relative to GND is a low level, which 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 a high level.

[0092] In this embodiment of the invention, Figure 3 and Figure 6 As shown, the charge and discharge state detection circuit 02 may include an OR gate O1 , a first D flip-flop Q1 , and a second D flip-flop Q2 .

[0093] The input end of the OR gate O1 is used to receive the first switch indication signal Signal1 and the second switch indication signal Signal2; the enable end of the first D flip-flop Q1 is used to receive the first switch indication signal Signal1, the clock end of the first D flip-flop Q1 is connected to the output end of the OR gate O1, and the output end of the first D flip-flop Q1 is used to output the first charge and discharge signal SignalQ1; the enable end of the second D flip-flop Q2 is used to receive the second switch indication signal Signal2, the clock end of the second D flip-flop Q2 is connected to the output end of the OR gate O1, and the output end of the second D flip-flop Q2 is used to output the second charge and discharge signal SignalQ2.

[0094] In this embodiment of the present invention, the Q terminals of the first D flip-flop Q1 and the second D flip-flop are both connected to the D terminals, thereby forming a T flip-flop.

[0095] When the first battery string V1 charges the second battery string V2: in the initial state, the first switch indication signal Signal1 is 0, the second switch indication signal Signal2 is 0, the first charge and discharge signal SignalQ1 is 0, and the second charge and discharge signal SignalQ2. When the first battery string V1 charges the energy transfer inductor L, the first switch indication signal Signal1 is 1, the second switch indication signal Signal2 is 0, the enable end of the first D flip-flop Q1 changes from 0 to 1, a positive jump occurs, and the first D flip-flop Q1 outputs the first charge and discharge signal SignalQ1 as 1; the enable end of the second D flip-flop Q2 remains unchanged, and the second D flip-flop Q2 outputs the second charge and discharge signal SignalQ2 as 0. When the energy transfer inductor L charges the second battery string V2, the first switch indication signal Signal1 is 0, the second switch indication signal Signal2 is 1, the enable terminal of the first D flip-flop Q1 changes from 1 to 0, a negative jump occurs, and the first D flip-flop Q1 outputs the first charge and discharge signal SignalQ1 as 1; the enable terminal 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 and discharge signal SignalQ2 as 1. When returning to the initial state, the first switch indication signal Signal1 and the second switch indication signal Signal2 are both 0, and the first switch indication signal Signal1 and the second switch indication signal Signal2 are output through the OR gate O1 to obtain a reset signal. At this time, the first D flip-flop Q1 outputs the first charge and discharge signal SignalQ1 as 0, and the second D flip-flop Q2 outputs the second charge and discharge signal SignalQ2 as 0.

[0096] 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 and discharge signal SignalQ1 is 0, and the second charge and discharge signal SignalQ2. When the second battery string V2 charges the energy transfer inductor L, the first switch indication signal Signal1 is 0, the second switch indication signal Signal2 is 1, the enable end of the first D flip-flop Q1 remains unchanged, and the first D flip-flop Q1 outputs the first charge and discharge signal SignalQ1 as 0; 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 and discharge signal SignalQ2 as 0. When the energy transfer inductor L charges the first battery string V1, the first switch indication signal Signal1 is 1, the second switch indication signal Signal2 is 0, the enable terminal of the first D flip-flop Q1 changes from 0 to 1, a positive jump occurs, and the first D flip-flop Q1 outputs the first charge and discharge signal SignalQ1 as 1; the enable terminal of the second D flip-flop Q2 changes from 1 to 0, a negative jump occurs, and the second D flip-flop Q2 outputs the second charge and discharge signal SignalQ2 as 1. When returning to the initial state, the first switch indication signal Signal1 and the second switch indication signal Signal2 are both 0, and the first switch indication signal Signal1 and the second switch indication signal Signal2 are output through the OR gate O1 to obtain a reset signal. At this time, the first D flip-flop Q1 outputs the first charge and discharge signal SignalQ1 as 0, and the second D flip-flop Q2 outputs the second charge and discharge signal SignalQ2 as 0.

[0097] In summary, the state table when the first battery string V1 charges the second battery string V2 may be as shown in Table 1, and the state table when the second battery string V2 charges the first battery string V1 may be as shown in Table 2.

[0098] Table 1: Charging status of the first battery string V1 to the second battery string V2

[0099]

[0100]

[0101] Table 2 The second battery string V2 charges the first battery string V1

[0102] Signal 1 Signal 2 Signal Q1 Signal Q2 Initial state 0 0 0 0 V2 discharges to L 0 1 0 1 L charges V1 1 0 1 1 Return to the initial state 0 0 0 0

[0103] In this embodiment of the invention, Figure 4 and Figure 7 As shown, the charge and discharge LED indication 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 LED1.

[0104] The input end of the third NOT gate N3 is used to receive the second switch indication signal Signal2, and the input end of the fourth NOT gate N4 is used to receive the second charge and discharge signal Signal Q2; the input end of the first AND gate A1 is connected to the output ends of the third NOT gate N3 and the fourth NOT gate N4, and the first AND gate A1 is used to receive the first switch indication signal Signal1 and the first charge and discharge signal Signal Q1; one end of the fourth resistor R4 is connected to the output end of the first AND gate A1; one end of the first indicator LED1 is connected to the other end of the fourth resistor R4, and the other end of the first indicator LED1 is grounded.

[0105] When all inputs of the first AND gate A1 are high level, the first AND gate A1 outputs high level, and the first indicator LED1 will be lit. Conversely, the second switch indication signal Signal2 and the second charge-discharge signal Signal Q2 must be input 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 signal Signal2 and the second charge-discharge signal Signal Q2 are 0; similarly, the first switch indication signal Signal1 and the first charge-discharge signal SignalQ1 are both 1, that is, the balancing unit 05 is in the state of the first battery string V1 discharging to the energy transfer inductor L.

[0106] In this embodiment of the invention, Figure 4 and Figure 7 As shown, the charge and discharge LED indication circuit 03 may further include a second AND gate A2, a fifth resistor R5, and a second indicator light LED2.

[0107] The input end of the second AND gate A2 is connected to the output end of the third NOT gate N3, and the second AND gate A2 is used to receive 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 to the output end of the second AND gate A2; one end of the second indicator light LED2 is connected to the other end of the fifth resistor R5, and the other end of the second indicator light LED2 is grounded.

[0108] When the second AND gate A2 is all high level, the second AND gate A2 outputs a high level, and the second indicator LED2 will be lit. Conversely, the second switch indication signal Signal2 must be input at a low level to become a high level after passing through the third NOT gate N3, so the second switch indication signal Signal2 is 0; similarly, the first switch indication signal Signal1, the first charge and discharge signal Signal Q1, and the second charge and discharge signal Signal Q2 are all 1, that is, the balancing unit 05 is in the energy transfer inductor L charging the first battery string V1.

[0109] In this embodiment of the invention, Figure 4 and Figure 7 As shown, the charge and discharge LED indication 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 LED3.

[0110] The input end of the fifth NOT gate N5 is used to receive the first switch indication signal Signal1, and the input end of the sixth NOT gate N6 is used to receive the first charge and discharge signal Signal Q1; the input end of the third AND gate A3 is connected to the output ends of the fifth NOT gate N5 and the sixth NOT gate N6, and the third AND gate A3 is used to receive the second switch indication signal Signal2 and the second charge and discharge signal Signal Q2; one end of the sixth resistor R6 is connected to the output end of the third AND gate A3; one end of the third indicator light LED3 is connected to the other end of the sixth resistor R6, and the other end of the third indicator light LED3 is grounded.

[0111] When the third AND gate A3 is all high level, the third AND gate A3 outputs high level, and the third indicator LED3 will be lit. In reverse, the first switch indication signal Signal1 and the first charge and discharge signal Signal Q1 must be input low level to become high level after passing through the fifth NOT gate N5 and the sixth NOT gate N6 respectively, so the first switch indication signal Signal1 and the first charge and discharge signal Signal Q1 are 0; similarly, the second switch indication signal Signal2 and the second charge and discharge signal Signal Q2 are both 1, that is, the balancing unit 05 is in the state of the second battery string V2 discharging to the energy transfer inductor L.

[0112] In this embodiment of the invention, Figure 4 and Figure 7 As shown, the charge and discharge LED indication circuit 03 may further include a fourth AND gate A4, a seventh resistor R7 and a fourth indicator light LED4.

[0113] The input end of the fourth AND gate A4 is connected to the output end of the fifth NOT gate N5, and the fourth AND gate A4 is used to receive the first switch indication signal Signal1, the second switch indication signal Signal2 and the second charge and discharge signal Signal Q2; one end of the seventh resistor R7 is connected to the output end of the fourth AND gate A4; one end of the fourth indicator light LED4 is connected to the other end of the seventh resistor R7, and the other end of the fourth indicator light LED4 is grounded.

[0114] When the fourth AND gate A4 is all high level, the fourth AND gate A4 outputs a high level, and the fourth indicator LED4 will be lit. In reverse, the first switch indication signal Signal1 must be input at a low level to become a high level after passing through the fifth NOT gate N5, so the first switch indication signal Signal1 is 0; similarly, the second switch indication signal Signal2, the first charge and discharge signal Signal Q1 and the second charge and discharge signal Signal Q2 are all 1, that is, the balancing unit 05 is in the state of the energy transfer inductor L charging the second battery string V2.

[0115] When the first switch indication signal Signal, the second switch indication signal Signal2, the first charge and discharge signal SignalQ1 and the second charge and discharge signal SignalQ2 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 levels, and the first indicator light LED1, the second indicator light LED2, the third indicator light LED3 and the fourth indicator light LED4 are all off.

[0116] In summary, the lighting logic of each indicator light can be shown in Table 3.

[0117] Table 3 Lighting logic table of each indicator light

[0118]

[0119]

[0120] On the other hand, the present invention further provides an inductive active balancing unit. Specifically, the inductive active balancing unit may include a balancing unit circuit and the hardware indication circuit as described above. Specifically, Figure 4 As shown, the balancing 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 inductor L.

[0121] The positive electrode of the first battery string V1 is connected to one end of the first switch S1, and the positive electrode of the first battery string V1 is connected to the negative electrode of the second diode D2; the negative electrode of the second battery string V2 is connected to one end of the second switch S2, and the negative electrode of the second battery string V2 is connected to 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 to 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 to the other end of the energy transfer inductor L, and the other end of the energy transfer inductor L is grounded.

[0122] In this embodiment of the present invention, the power supply voltage of the hardware indication circuit is 15V.

[0123] Through the above technical solution, the inductive active balancing unit and its hardware indication circuit provided by the present invention connect the switch state detection circuit 01 with the balancing unit 05, the first NOT gate N1 outputs the first switch indication signal Signal 1, the second NOT gate N2 outputs the second switch indication signal Signal 2, the charge and discharge state detection circuit 02 determines the charge and discharge state of the balancing unit 05 according to the first switch indication signal Signal 1 and the second switch indication signal Signal 2, and finally displays the charge and discharge state of the balancing unit 05 through the charge and discharge LED indication circuit 03. The hardware indication circuit has high portability and strong applicability, and can accurately display the charge and discharge state of the balancing unit.

[0124] It should also be noted that the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, commodity or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, commodity or device. In the absence of more restrictions, the elements defined by the sentence "comprises a ..." do not exclude the existence of other identical elements in the process, method, commodity or device including the elements.

[0125] The above are only embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application may have various changes and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included within the scope of the claims of the present application.

Claims

1. A hardware indication circuit of an inductive active balancing unit, characterized in that: include: A switch state detection circuit (01), the switch state detection circuit (01) comprising: A first resistor, one end of which is connected to one end of a first switch of the equalizing unit (05); a first NOT gate, an input end of which is connected to the other end of the first resistor, and an output end of the first NOT gate is used to output a first switch indication signal; A second resistor, one end of which is connected to one end of a second switch of the equalizing unit (05); an absolute value circuit (04), used for performing an absolute value calculation operation on a potential signal at one end of the second switch, one end of the absolute value circuit (04) being connected to the other end of the second resistor; a third resistor, one end of which is connected to the other end of the absolute value circuit (04); a second NOT gate, an input end of which is connected to the other end of the third resistor, and an output end of the second NOT gate is used to output a second switch indication signal; A charge and discharge state detection circuit (02), connected to the switch state detection circuit (01), and used to detect the charge and discharge state of the equalization unit (05); A charge and discharge LED indication circuit (03), connected to the switch state detection circuit (01) and the charge and discharge state detection circuit (02), and used for displaying the charge and discharge state of the equalization unit (05); The charge and discharge state detection circuit (02) comprises: An OR gate, wherein an input end of the OR gate is used to receive the first switch indication signal and the second switch indication signal; a first D flip-flop, wherein an enable terminal of the first D flip-flop is used to receive the first switch indication signal, a clock terminal of the first D flip-flop is connected to an output terminal of the OR gate, and an output terminal of the first D flip-flop is used to output a first charge and discharge signal; A second D flip-flop, wherein the enable terminal of the second D flip-flop is used to receive the second switch indication signal, the clock terminal of the second D flip-flop is connected to the output terminal of the OR gate, and the output terminal of the second D flip-flop is used to output a second charge and discharge signal.

2. The hardware indication circuit according to claim 1, characterized in that: The absolute value circuit (04) comprises: a first operational amplifier, wherein a negative input terminal of the first operational amplifier is connected to the other end of the second resistor, a positive input terminal of the first operational amplifier is grounded, and a negative input terminal of the first operational amplifier is connected to an output terminal of the first operational amplifier; A second operational amplifier, wherein the positive input terminal of the second operational amplifier is connected to the output terminal of the first operational amplifier, the positive input terminal of the second operational amplifier is connected to the output terminal of the second operational amplifier, and the output terminal of the second operational amplifier is connected to 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, the input end of the diode is connected to the output end of the first operational amplifier, and the output end of the diode is connected to the positive input end of the second operational amplifier.

4. The hardware indication circuit according to claim 1, characterized in that: The charging and discharging LED indicating circuit (03) comprises: A third NOT gate, whose input terminal is used to receive the second switch indication signal; a fourth NOT gate, whose input terminal is used to receive the second charge and discharge signal; a first AND gate, whose input end is connected to both the output end of the third NOT gate and the output end of the fourth NOT gate, and the first AND gate is used to receive the first switch indication signal and the first charge and discharge signal; a fourth resistor, one end of which is connected to the output end of the first AND gate; A first indicator light, one end of the first indicator light is connected to the other end of the fourth resistor, and the other end of the first indicator light is grounded.

5. The hardware indication circuit according to claim 4, characterized in that: The charging and discharging LED indicating circuit (03) further comprises: a second AND gate, whose input end is connected to the output end of the third NOT gate, and the second AND gate is used to receive the first switch indication signal, the second switch indication signal and the first charge and discharge signal; a fifth resistor, one end of which is connected to the output end of the second AND gate; A second indicator light, one end of the second indicator light is connected to the other end of the fifth resistor, and the other end of the second indicator light is grounded.

6. The hardware indication circuit according to claim 4, characterized in that: The charging and discharging LED indicating circuit (03) further comprises: a fifth NOT gate, whose input terminal is used to receive the first switch indication signal; a sixth NOT gate, whose input terminal is used to receive the first charge and discharge signal; a third AND gate, whose input end is connected to the output ends of the fifth NOT gate and the sixth NOT gate, and the third AND gate is used to receive the second switch indication signal and the second charge and discharge signal; a sixth resistor, one end of which is connected to the output end of the third AND gate; A third indicator light, one end of the third indicator light is connected to the other end of the sixth resistor, and the other end of the third indicator light is grounded.

7. The hardware indication circuit according to claim 6, characterized in that: The charging and discharging LED indicating circuit (03) further comprises: a fourth AND gate, whose input end is connected to the output end of the fifth NOT gate, and the fourth AND gate is used to receive the first switch indication signal, the second switch indication signal and the second charge-discharge signal; a seventh resistor, one end of which is connected to the output end of the fourth AND gate; A fourth indicator light, one end of the fourth indicator light is connected to the other end of the seventh resistor, and the other end of the fourth indicator light is grounded.

8. An inductive active balancing unit, characterized in that: include: Equalizing unit circuit; A hardware indication circuit as claimed in any one of claims 1 to 7.

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