CN209930017U - Battery equalizer - Google Patents
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- CN209930017U CN209930017U CN201921119331.1U CN201921119331U CN209930017U CN 209930017 U CN209930017 U CN 209930017U CN 201921119331 U CN201921119331 U CN 201921119331U CN 209930017 U CN209930017 U CN 209930017U
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Abstract
The utility model discloses a battery equalizer, which comprises an equalization control unit, a Bluetooth master control module unit, a sampling circuit unit, a storage unit and a power supply unit, wherein the equalization control unit is used for carrying out electric energy equalization control on a plurality of battery monomers in a battery pack; the sampling circuit unit collects the electric signals of each battery monomer in the battery pack and sends the electric signals to the Bluetooth master control module unit; the Bluetooth master control module unit converts the electric signals of each battery monomer into data and stores the data in a storage unit; the Bluetooth master control module unit also wirelessly transmits the real-time converted data and the historical data of the storage unit in a Bluetooth mode. The utility model discloses make battery equalizer's data can preserve and can pass through the historical data of the outside smart machine of bluetooth wireless connection like smart mobile phone in order to look over battery equalizer.
Description
Technical Field
The utility model relates to a balanced technical field of battery especially relates to a battery equalizer.
Background
The battery weighing apparatus is mainly applied to the series application scene of battery packs such as lead-acid batteries, nickel-chromium batteries, nickel-hydrogen batteries, lithium batteries and the like, and aims to prevent the over-charging or over-discharging of single batteries caused by the difference among battery monomers in the battery packs from reducing the overall service life of the battery packs too fast.
The existing battery equalization controller generally adopts an electronic nixie tube or an external voltage meter head form to display data such as voltage in real time, does not store the data, and cannot be wirelessly connected with intelligent electronic equipment such as a mobile phone to check historical data of a battery equalizer.
Therefore, the prior art has yet to be developed.
SUMMERY OF THE UTILITY MODEL
In view of the foregoing deficiencies of the prior art, an object of the present invention is to provide a battery balancer, which is capable of storing data of the battery balancer and checking the history data of the battery balancer via a bluetooth wireless connection external smart device such as a smart phone.
In order to achieve the above object, the present invention provides the following technical solutions:
a battery equalizer for equalizing control of a battery pack, wherein,
the Bluetooth master control module is characterized by comprising a balance control unit, a Bluetooth master control module unit, a sampling circuit unit, a storage unit and a power supply unit, wherein the balance control unit and the sampling circuit unit are connected with a battery pack;
the balance control unit is used for carrying out electric energy balance control on a plurality of battery monomers in the battery pack;
the sampling circuit unit collects the electric signals of each battery monomer in the battery pack and sends the electric signals to the Bluetooth master control module unit;
the Bluetooth master control module unit converts the electric signals of each battery monomer into data and stores the data in a storage unit;
the Bluetooth master control module unit also wirelessly transmits the real-time converted data and the historical data of the storage unit in a Bluetooth mode.
The balance control unit comprises a public end, a plurality of groups of self-excited switch inversion voltage regulating circuits, a transformer primary coil and a transformer secondary coil;
one end of each self-excitation switch inversion voltage regulating circuit is connected with a battery monomer in the battery pack, the other end of each self-excitation switch inversion voltage regulating circuit is connected with a transformer primary coil, the transformer primary coil is coupled with a transformer secondary coil, and a plurality of groups of transformer secondary coils are connected to a common end;
the self-excited switch inversion voltage regulating circuit is used for inverting battery monomers with different voltage specifications into the same voltage for output and performing turn-off and turn-on control on the electric energy charge and discharge of the battery monomers;
the multiple groups of transformer primary coils and transformer secondary coils are used for converting the electric energy of at least one battery cell and transferring the electric energy to at least another battery cell through a common terminal.
Wherein, self-excited switch contravariant regulator circuit includes:
a first end of an inductor L15 connected with the anode of the battery cell, a second end of the inductor L15 is connected with a first end of a resistor R34 and the 2 nd and 3 rd terminals of a transformer primary coil T1, a second end of a resistor R34 is connected with the first ends of resistors R35, R38 and R39, a second end of a resistor R39 is connected with the cathode of the battery cell, a second end of a resistor R35 is connected with the first end of a resistor R36, the input end of a switch diode D8, the output end of a voltage regulator DZ1, the first end of a capacitor C32 and the gate G of a field effect tube Q1, the output end of a switch diode D8 is connected with the second end of a capacitor C32 and the 4 th terminal of a transformer primary coil T1, the drain D of the field effect tube Q1 is connected with the first end of a capacitor C33 and the 1 st terminal of the primary coil T1, a second end of a resistor R36 is connected with the first end of the resistor R36, the input end of a voltage regulator DZ 36, the source, The second end of the resistor R37 is connected with the second end of the resistor R38, the input end of the switch diode D9, the output end of the voltage regulator tube DZ2, the first end of the capacitor C38 and the grid G of the field effect tube Q1, the output end of the switch diode D9 is connected with the second end of the capacitor C38 and the 1 st terminal of the primary coil T1, and the drain D of the field effect tube Q2 is connected with the second end of the capacitor C33 and the 4 th terminal of the primary coil T1 of the transformer.
The sampling circuit unit comprises a plurality of differential amplification sampling circuits, the input end of each differential amplification sampling circuit is connected with a single battery, and the output end of each differential amplification sampling circuit is connected with the Bluetooth master control module unit.
The balance control unit comprises a common energy storage capacitor, a plurality of groups of switch circuits and a comparison circuit;
one end of each group of switch circuits is connected with a single battery in the battery pack, the other end of each group of switch circuits is connected with the common energy storage capacitor, one end of each group of comparison circuits is connected with a single battery in the battery pack, and the other end of each group of comparison circuits is connected with the switch circuits of the group;
the switching circuit is used for carrying out turn-off and turn-on control on the electric energy charge and discharge of the battery monomer, and the comparison circuit is used for controlling the turn-off and turn-on of the switching circuit;
the common energy storage capacitor is used for transferring the electric energy of at least one battery cell to at least one other battery cell.
The battery pack is provided with two single batteries which are a first single battery and a second single battery respectively, a switching circuit connected with the first single battery comprises field-effect tubes QC1 and QC3, and a switching circuit connected with the second single battery comprises field-effect tubes QC4 and QC 2;
wherein: a drain electrode D of the field-effect tube QC1 is connected with an anode RD end of the battery cell I, a grid electrode G of the field-effect tube QC1 is connected with a first comparison circuit, a source electrode S of the field-effect tube QC1 is connected with a drain electrode D of the field-effect tube QC2 and a first end of the common energy storage capacitor CP3, a drain electrode D of the field-effect tube QC3 is connected with a cathode WH end of the battery cell I and a source electrode S of the field-effect tube QC2, a grid electrode G of the field-effect tube QC3 is connected with a first comparison circuit, and a source electrode S of the field-effect tube QC3 is connected with a;
and a source electrode S of the field-effect tube QC4 is connected with the negative electrode BL end of the second battery cell, a grid electrode G of the field-effect tube QC4 is connected with the second comparison circuit, a source electrode S of the field-effect tube QC2 is connected with a drain electrode D of the field-effect tube QC3 and the positive electrode WH end of the second battery cell, and a grid electrode G of the field-effect tube QC2 is connected with the second comparison circuit.
The first comparison circuit and the second comparison circuit are compared by adopting a transport amplifier.
The sampling circuit unit comprises a plurality of battery voltage division sampling circuits, the input end of each battery voltage division sampling circuit is connected with a single battery, and the output end of each battery voltage division sampling circuit is connected with the Bluetooth master control module unit.
The Bluetooth master control module unit comprises a singlechip and a peripheral circuit which integrate a Bluetooth transmission function; the model of the singlechip integrating the Bluetooth transmission function is CC 2541.
The utility model discloses a battery equalizer, through setting up balanced the control unit, bluetooth master control module unit, the sampling circuit unit, memory cell and electrical unit, because of memory cell can save battery free sampled data, can send the historical data of real-time data and storage to outside smart machine like smart mobile phone with the mode of bluetooth through bluetooth master control module unit simultaneously, then the user can look over battery free real-time voltage and historical voltage data in the group battery through the built-in procedure of outside smart machine, so that know the operating condition who masters the group battery comprehensively.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
Fig. 1 is a schematic diagram of a circuit module of a first embodiment of the battery balancer of the present invention;
fig. 2 is a schematic circuit diagram of the bluetooth master control module unit and the storage unit of the present invention;
fig. 3 is a schematic diagram of a circuit module assembly according to a first embodiment of the equalizing control unit of the present invention;
FIG. 4 is a circuit diagram of the equalization control unit of FIG. 3;
FIG. 5 is a schematic diagram of the inverter regulator circuit of the self-excited switch of FIG. 4;
fig. 6 is a schematic circuit diagram of a first embodiment of the sampling circuit unit of the present invention;
fig. 7 is a schematic diagram of a circuit module assembly according to a first embodiment of the equalizing control unit of the present invention;
FIG. 8 is a circuit schematic of the equalization control unit of FIG. 7;
FIG. 9 is a circuit schematic of the connection comparison circuit of FIG. 8;
fig. 10 is a schematic circuit diagram of a second embodiment of the sampling circuit unit according to the present invention;
fig. 11 is a schematic circuit diagram of a first embodiment of the power supply unit according to the present invention.
Description of reference numerals:
100-a battery equalizer, 10-an equalization control unit, 11-a self-excited switch inversion voltage regulation circuit, 12-a transformer primary coil, 13-a transformer secondary coil, 14-a common terminal, 15-a switch circuit, 16-a common energy storage capacitor, 17-a comparison circuit, 20-a Bluetooth main control module unit, 30-a sampling circuit unit, 40-a storage unit, 50-a power supply unit and 200-a battery pack.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
It should be noted that all the directional indicators (such as upper, lower, left, right, front and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the motion situation, etc. in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indicator is changed accordingly.
In the present application, unless expressly stated or limited otherwise, the terms "connected" and "fixed" are to be construed broadly, e.g., "connected" may be a fixed connection or a removable connection, or may be integral therewith; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
In addition, descriptions in the present application as to "first", "second", and the like are for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicit to the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature.
Referring to fig. 1, a battery balancer 100 according to the present invention is used for balancing control of a battery pack 200.
The battery equalizer 100 comprises an equalization control unit 10, a bluetooth main control module unit 20, a sampling circuit unit 30, a storage unit 40 and a power supply unit 50, the equalization control unit 10 and the sampling circuit unit 30 are connected with a battery pack 200, the power supply unit 50 is connected with the bluetooth main control module unit 20, the sampling circuit unit 30 and the storage unit 40 to supply power, and the bluetooth main control module unit 20 is also connected with the sampling circuit unit 30 and the storage unit 40.
The balance control unit 10 is configured to perform electric energy balance control on a plurality of battery cells in the battery pack 200; the sampling circuit unit 30 collects the electric signal of each battery cell in the battery pack 200 and sends the electric signal to the bluetooth main control module unit 20; the bluetooth master control module unit 20 converts the electric signal of each battery cell into data and stores the data in the storage unit 40; the bluetooth master module unit 20 also wirelessly transmits the real-time converted data and the history data of the storage unit 40 in a bluetooth manner.
Because the utility model discloses be provided with memory cell 40, can save battery free sampled data, and the balanced device among the prior art is generally not provided with memory cell, and directly uses control module's memory to carry out the buffer memory of data, and the operator can only acquire real-time data like this, historical data before can not transferring.
Simultaneously because the utility model discloses be provided with bluetooth master control module unit 20, bluetooth master control module unit 20 both plays the master control unit and controls and data processing each unit, and bluetooth master control module unit 20 still plays the effect of bluetooth wireless transmission data simultaneously, and like this, passes through bluetooth wireless connection as the smart mobile phone when outside smart machine the utility model discloses a battery equalizer 100 back, through the built-in procedure that corresponds of smart mobile phone, acquire the real-time data in the battery equalizer 100 and the historical data in the storage unit 40 in the battery equalizer 100, then the user can look over free real-time voltage of battery and historical voltage data in the group battery 200 through equipment such as smart mobile phone to in understanding the working state of monomer battery in the group battery at each time quantum comprehensively. To facilitate maintenance and management of the battery pack 200.
And simultaneously the utility model discloses a battery equalizer 100 adopts bluetooth mode transmission data to be convenient for battery equalizer 100's waterproof installation to handle.
Preferably, as shown in fig. 2, the bluetooth master control module unit 20 of the present invention includes a single chip microcomputer U4 and a peripheral circuit, which integrate the bluetooth transmission function. The model of the singlechip U4 integrated with the Bluetooth transmission function is CC 2541. The peripheral circuit comprises a crystal oscillator circuit connected with the U4 and a circuit connected with the Bluetooth antenna P2.
The utility model discloses a memory cell 40 adopts solitary memory chip U12, and U12's model is 25LC 256.
One end of each self-excitation switch inversion voltage regulating circuit 11 is connected with a single battery in the battery pack 200, the other end is connected with a transformer primary coil 12, the transformer primary coil 12 is coupled with a transformer secondary coil 13, and the multiple groups of transformer secondary coils 13 are connected to a common terminal 14.
The self-excited switch inversion voltage regulating circuit 11 is used for inverting the battery monomers with different voltage specifications into the same voltage for output, and performing turn-off and turn-on control on the electric energy charge and discharge of the battery monomers.
The multiple sets of transformer primary coils 12 and transformer secondary coils 13 are used for converting electric energy of at least one battery cell and transferring the electric energy to at least another battery cell through a common terminal 14.
The embodiment 1 is suitable for performing electric energy balance control on the single batteries with different voltage specifications, for example, when the voltage specifications of the single batteries 1 and 2 are different, when the electric quantity of the single battery 2 is lower and the electric quantity of the single battery 1 is higher, the self-excited switch inverter voltage regulating circuit 11 connected with the single battery 1 inverts the voltage of the electric quantity output by the single battery 1 into the voltage of the adaptive single battery 2, and then the voltage is input into the single battery 2 through the transformer and the common terminal. Thus, the embodiment 1 can be used for balancing the electric energy between the battery cells with the same voltage specification, and can also be used for balancing the electric energy between the battery cells with different voltage specifications, so that the application range of the battery balancer 100 in the embodiment is expanded.
Specifically, as shown in fig. 5, the self-excited switching inverter regulator circuit 11 of embodiment 1 includes:
a first end of an inductor L15 connected with the anode of the battery cell, a second end of the inductor L15 is connected with a first end of a resistor R34 and the 2 nd and 3 rd terminals of a transformer primary coil T1, a second end of a resistor R34 is connected with the first ends of resistors R35, R38 and R39, a second end of a resistor R39 is connected with the cathode of the battery cell, a second end of a resistor R35 is connected with the first end of a resistor R36, the input end of a switch diode D8, the output end of a voltage regulator DZ1, the first end of a capacitor C32 and the gate G of a field effect tube Q1, the output end of a switch diode D8 is connected with the second end of a capacitor C32 and the 4 th terminal of a transformer primary coil T1, the drain D of the field effect tube Q1 is connected with the first end of a capacitor C33 and the 1 st terminal of the primary coil T1, a second end of a resistor R36 is connected with the first end of the resistor R36, the input end of a voltage regulator DZ 36, the source, The second end of the resistor R37 is connected with the second end of the resistor R38, the input end of the switch diode D9, the output end of the voltage regulator tube DZ2, the first end of the capacitor C38 and the grid G of the field effect tube Q1, the output end of the switch diode D9 is connected with the second end of the capacitor C38 and the 1 st terminal of the primary coil T1, and the drain D of the field effect tube Q2 is connected with the second end of the capacitor C33 and the 4 th terminal of the primary coil T1 of the transformer. Meanwhile, filter capacitors C35, C36 and C37 are arranged between the positive electrode and the negative electrode of the battery monomer in the circuit.
In the circuit, C33, Q1, Q2, D8 and D9 are combined to realize self-oscillation switching and inversion voltage regulation.
Further, the sampling circuit unit 30 of embodiment 1 includes a plurality of differential amplification sampling circuits, an input terminal of each differential amplification sampling circuit is connected to a single battery, and an output terminal of each differential amplification sampling circuit is connected to the bluetooth main control module unit 20. As shown in fig. 6, two input terminals BH1 and bal 1 of the differential amplification sampling circuit are connected to a battery cell, then voltage sampling is performed through a transport amplifier U3A, and the differential amplification sampling circuit is connected to a V1 wiring pin of a U4 chip of the bluetooth main control module unit 20 through a V1 terminal. Fig. 6 shows only the differential amplification sampling circuit of one battery cell, and the differential amplification sampling circuits of other battery cells are the same as those of the battery cells and are not shown one by one. The differential amplification sampling circuit has high sampling precision, and can improve the voltage sampling precision of the single battery after equalization processing by the equalization control unit 10 in embodiment 1.
In embodiment 2, as shown in fig. 7, the equalization control unit 10 of this embodiment includes a common energy storage capacitor 16, a plurality of sets of switch circuits 15, and a comparison circuit 17.
One end of each group of switch circuits 15 is connected with one battery cell in the battery pack 200, the other end is connected with the common energy storage capacitor 16, one end of each group of comparison circuits 17 is connected with one battery cell in the battery pack 200, and the other end is connected with the group of switch circuits 15.
The switch circuit 15 is used for performing turn-off and turn-on control on the electric energy charge and discharge of the battery monomer, and the comparison circuit 17 is used for controlling turn-off and turn-on of the switch circuit 15.
The common energy storage capacitor 16 is used for transferring the electric energy of at least one battery cell to at least another battery cell.
The embodiment 2 is suitable for performing electric energy balance control on battery cells with the same voltage specification, the common energy storage capacitor 16 is combined with the switch circuit 15 and the comparison circuit 17 to transfer electric energy among different battery cells, and the circuit is simple and easy to implement.
Specifically, as shown in fig. 8, the battery pack 200 of embodiment 2 includes two battery cells, i.e., a first battery cell and a second battery cell, the switch circuit connected to the first battery cell includes field effect transistors QC1 and QC3, and the switch circuit connected to the second battery cell includes field effect transistors QC4 and QC 2.
Wherein: a drain electrode D of the field-effect tube QC1 is connected with an anode RD end of the battery cell I, a grid electrode G of the field-effect tube QC1 is connected with a first comparison circuit, a source electrode S of the field-effect tube QC1 is connected with a drain electrode D of the field-effect tube QC2 and a first end of the common energy storage capacitor CP3, a drain electrode D of the field-effect tube QC3 is connected with a cathode WH end of the battery cell I and a source electrode S of the field-effect tube QC2, a grid electrode G of the field-effect tube QC3 is connected with a first comparison circuit, and a source electrode S of the field-effect tube QC3 is connected with a;
and a source electrode S of the field-effect tube QC4 is connected with the negative electrode BL end of the second battery cell, a grid electrode G of the field-effect tube QC4 is connected with the second comparison circuit, a source electrode S of the field-effect tube QC2 is connected with a drain electrode D of the field-effect tube QC3 and the positive electrode WH end of the second battery cell, and a grid electrode G of the field-effect tube QC2 is connected with the second comparison circuit.
Thus, as shown in fig. 8, when the battery cell 2 has a high power and the battery cell 1 has a low power and requires to input power, the comparison circuit 1 controls the switch circuits QC1 and QC3 to be turned off, the comparison circuit 2 controls the switch circuits QC4 and QC2 to be turned on, at this time, the power of the battery cell 2 is output to the common energy storage capacitor CP3 to store the power, then the comparison circuit 1 controls the switch circuits QC1 and QC3 to be turned on, the comparison circuit 2 controls the switch circuits QC4 and QC2 to be turned off, and at this time, the power stored in the common energy storage capacitor CP3 is input to the battery cell 1 to be charged.
Preferably, the first comparison circuit and the second comparison circuit in embodiment 2 use a transport amplifier for comparison, as shown in fig. 9, the first comparison circuit uses an operational amplifier U2B and controls the on and off of the switch circuits QC2 and QC4 in combination with Q6, Q7, Q10 and Q11, the second comparison circuit uses an operational amplifier U2D and controls the on and off of the switch circuits QC1 and QC3 in combination with Q4, Q5, Q8 and Q9,
furthermore, the sampling circuit unit 30 of embodiment 2 includes a plurality of battery voltage-dividing sampling circuits, an input terminal of each battery voltage-dividing sampling circuit is connected to a battery cell, and an output terminal of each battery voltage-dividing sampling circuit is connected to the bluetooth main control module unit 20. As shown in fig. 10, the input terminal RD of the battery voltage division sampling circuit is connected to a battery cell, and then divided by resistors R1, R2 and R9 and connected to the V2 connection pin of the U4 chip of the bluetooth main control module unit 20 through the V2 terminal. Fig. 10 shows only one cell voltage division sampling circuit, and the other cell voltage division sampling circuits are the same and are not shown one by one.
As shown in fig. 11, the power supply unit of embodiment 1 and embodiment 2 of the present invention adopts the dc voltage converter U3 to perform the voltage reduction of the power supply and the voltage stabilizer U5 to perform the voltage stabilization, so as to provide the stable voltage for the U4 chip of the bluetooth main control module unit, the U12 chip of the storage unit and the sampling circuit unit. Preferably, the model of the direct-current voltage converter U3 of the utility model adopts H34063A, and the model of the voltage stabilizer U5 adopts AMS1117 to output stable 3.3V voltage.
The utility model provides a the utility model discloses a battery equalizer 100, through setting up balanced the control unit 10, bluetooth master control module unit 20, sampling circuit unit 30, memory cell 40 and electrical unit 50, because of memory cell 40 can save battery monomer's sampling data, can send real-time data and the historical data of storage to outside smart machine like smart mobile phone with the mode of bluetooth through bluetooth master control module unit 20 simultaneously, the user can look over battery monomer's real-time voltage and historical voltage data in the group battery through the built-in procedure of outside smart machine, so that know the operating condition who grasps the group battery comprehensively, utilize the maintenance management of group battery.
The above embodiments of the present invention are merely examples for clearly illustrating the present invention and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. Not all embodiments are exhaustive. All obvious changes or variations led out by the technical scheme of the utility model are still in the protection scope of the utility model.
Claims (9)
1. A battery equalizer for equalization control of a battery pack,
the Bluetooth master control module is characterized by comprising a balance control unit, a Bluetooth master control module unit, a sampling circuit unit, a storage unit and a power supply unit, wherein the balance control unit and the sampling circuit unit are connected with a battery pack;
the balance control unit is used for carrying out electric energy balance control on a plurality of battery monomers in the battery pack;
the sampling circuit unit collects the electric signals of each battery monomer in the battery pack and sends the electric signals to the Bluetooth master control module unit;
the Bluetooth master control module unit converts the electric signals of each battery monomer into data and stores the data in a storage unit;
the Bluetooth master control module unit also wirelessly transmits the real-time converted data and the historical data of the storage unit in a Bluetooth mode.
2. The battery equalizer according to claim 1, wherein the equalization control unit comprises a common terminal and a plurality of groups of self-excited switching inversion voltage regulating circuits, a transformer primary coil and a transformer secondary coil;
one end of each self-excitation switch inversion voltage regulating circuit is connected with a battery monomer in the battery pack, the other end of each self-excitation switch inversion voltage regulating circuit is connected with a transformer primary coil, the transformer primary coil is coupled with a transformer secondary coil, and a plurality of groups of transformer secondary coils are connected to a common end;
the self-excited switch inversion voltage regulating circuit is used for inverting battery monomers with different voltage specifications into the same voltage for output and performing turn-off and turn-on control on the electric energy charge and discharge of the battery monomers;
the multiple groups of transformer primary coils and transformer secondary coils are used for converting the electric energy of at least one battery cell and transferring the electric energy to at least another battery cell through a common terminal.
3. The battery equalizer of claim 2, wherein the self-excited switching inverter regulator circuit comprises:
a first end of an inductor L15 connected with the anode of the battery cell, a second end of the inductor L15 is connected with a first end of a resistor R34 and the 2 nd and 3 rd terminals of a transformer primary coil T1, a second end of a resistor R34 is connected with the first ends of resistors R35, R38 and R39, a second end of a resistor R39 is connected with the cathode of the battery cell, a second end of a resistor R35 is connected with the first end of a resistor R36, the input end of a switch diode D8, the output end of a voltage regulator DZ1, the first end of a capacitor C32 and the gate G of a field effect tube Q1, the output end of a switch diode D8 is connected with the second end of a capacitor C32 and the 4 th terminal of a transformer primary coil T1, the drain D of the field effect tube Q1 is connected with the first end of a capacitor C33 and the 1 st terminal of the primary coil T1, a second end of a resistor R36 is connected with the first end of the resistor R36, the input end of a voltage regulator DZ 36, the source, The second end of the resistor R37 is connected with the second end of the resistor R38, the input end of the switch diode D9, the output end of the voltage regulator tube DZ2, the first end of the capacitor C38 and the grid G of the field effect tube Q1, the output end of the switch diode D9 is connected with the second end of the capacitor C38 and the 1 st terminal of the primary coil T1, and the drain D of the field effect tube Q2 is connected with the second end of the capacitor C33 and the 4 th terminal of the primary coil T1 of the transformer.
4. The battery equalizer according to claim 1, wherein the sampling circuit unit comprises a plurality of differential amplification sampling circuits, an input end of each differential amplification sampling circuit is connected with a battery cell, and an output end of each differential amplification sampling circuit is connected with the bluetooth master control module unit.
5. The battery equalizer according to claim 1, wherein the equalization control unit comprises a common energy storage capacitor, a plurality of groups of switch circuits and a comparison circuit;
one end of each group of switch circuits is connected with a single battery in the battery pack, the other end of each group of switch circuits is connected with the common energy storage capacitor, one end of each group of comparison circuits is connected with a single battery in the battery pack, and the other end of each group of comparison circuits is connected with the switch circuits of the group;
the switching circuit is used for carrying out turn-off and turn-on control on the electric energy charge and discharge of the battery monomer, and the comparison circuit is used for controlling the turn-off and turn-on of the switching circuit;
the common energy storage capacitor is used for transferring the electric energy of at least one battery cell to at least one other battery cell.
6. The battery equalizer according to claim 5, wherein the battery pack is provided with two battery cells, namely a battery cell I and a battery cell II, the switching circuit connected with the battery cell I comprises field effect transistors QC1 and QC3, and the switching circuit connected with the battery cell II comprises field effect transistors QC4 and QC 2;
wherein: a drain electrode D of the field-effect tube QC1 is connected with an anode RD end of the battery cell I, a grid electrode G of the field-effect tube QC1 is connected with a first comparison circuit, a source electrode S of the field-effect tube QC1 is connected with a drain electrode D of the field-effect tube QC2 and a first end of the common energy storage capacitor CP3, a drain electrode D of the field-effect tube QC3 is connected with a cathode WH end of the battery cell I and a source electrode S of the field-effect tube QC2, a grid electrode G of the field-effect tube QC3 is connected with a first comparison circuit, and a source electrode S of the field-effect tube QC3 is connected with a;
and a source electrode S of the field-effect tube QC4 is connected with the negative electrode BL end of the second battery cell, a grid electrode G of the field-effect tube QC4 is connected with the second comparison circuit, a source electrode S of the field-effect tube QC2 is connected with a drain electrode D of the field-effect tube QC3 and the positive electrode WH end of the second battery cell, and a grid electrode G of the field-effect tube QC2 is connected with the second comparison circuit.
7. The battery equalizer of claim 6, wherein the first and second comparison circuits employ a transport amplifier for comparison.
8. The battery equalizer according to claim 5, wherein the sampling circuit unit comprises a plurality of battery voltage-dividing sampling circuits, an input terminal of each battery voltage-dividing sampling circuit is connected with a battery cell, and an output terminal of each battery voltage-dividing sampling circuit is connected with the Bluetooth main control module unit.
9. The battery equalizer according to claim 1, wherein the bluetooth master control module unit comprises a single chip microcomputer and a peripheral circuit which integrate a bluetooth transmission function;
the model of the singlechip integrating the Bluetooth transmission function is CC 2541.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921119331.1U CN209930017U (en) | 2019-07-17 | 2019-07-17 | Battery equalizer |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921119331.1U CN209930017U (en) | 2019-07-17 | 2019-07-17 | Battery equalizer |
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| CN209930017U true CN209930017U (en) | 2020-01-10 |
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| CN201921119331.1U Active CN209930017U (en) | 2019-07-17 | 2019-07-17 | Battery equalizer |
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