CN216672648U - Battery equalization system based on wireless network - Google Patents

Battery equalization system based on wireless network Download PDF

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Publication number
CN216672648U
CN216672648U CN202220010020.7U CN202220010020U CN216672648U CN 216672648 U CN216672648 U CN 216672648U CN 202220010020 U CN202220010020 U CN 202220010020U CN 216672648 U CN216672648 U CN 216672648U
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mos tube
diode
resistor
transformer
battery
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邓先波
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Dongguan Lvgu Battery Technology Co ltd
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Dongguan Lvgu Battery Technology Co ltd
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/70—Energy storage systems for electromobility, e.g. batteries

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Abstract

The utility model discloses a battery equalization system based on a wireless network. The intelligent power supply comprises a battery pack and a PCB, wherein an MCU controller, a Bluetooth 4.2 module, a GPS positioning module and a plurality of groups of balancing modules are integrated on the PCB; the Bluetooth 4.2 module and the GPS positioning module are both connected with the MCU controller, the MCU controller is connected with a plurality of groups of equalizing modules through the optical coupling isolation circuit, and the plurality of groups of equalizing modules are respectively connected with a single battery in the battery pack. The energy balance of a single energy storage battery is respectively and correspondingly managed by a plurality of groups of balancing modules, so that the voltage ratio between the balancing lines is K1: K2: K3: … … Kn:1; and moreover, by utilizing the GPS module and the Bluetooth 4.2 module, the working dynamic position of the battery pack and the working on and off can be detected through a background.

Description

Battery equalization system based on wireless network
Technical Field
The utility model relates to the technical field of battery discharge, in particular to a battery equalization system based on a wireless network.
Background
As is well known, the meaning of equalization is to utilize electronic technology to keep the voltage deviation of the lithium ion battery cells within an expected range, thereby ensuring that each cell is not damaged during normal use. If the balance control is not carried out, the voltage of each single battery is gradually differentiated along with the increase of the charge-discharge cycle, and the service life is greatly shortened. In general, it is well accepted that the deviation of the cell voltage of the lithium ion battery during charging is in the 50mV range. The main reasons for the voltage deviation of the cells are on the one hand the difference between the cells and on the other hand the consumption of the electronic circuit measured.
At present, although the balance of the battery can be realized in the existing battery balancing system, the battery can generate a large amount of heat in the balancing process, the overall temperature is too high, danger is easily brought, and the conventional battery balancing system does not have the functions of remote data transmission, position positioning and the like, and is not intelligent enough when being used.
SUMMERY OF THE UTILITY MODEL
In view of the above-mentioned shortcomings in the prior art, the present invention provides a battery balancing system based on a wireless network.
In order to achieve the purpose, the utility model adopts the following technical scheme:
a wireless network-based battery equalization system comprises a battery pack and a PCB, wherein an MCU controller for sorting signals and realizing data control output, a Bluetooth 4.2 module for Bluetooth wireless communication, a GPS positioning module for sending bit information in real time and a plurality of groups of equalization modules for battery work equalization processing are integrated on the PCB;
the Bluetooth 4.2 module and the GPS positioning module are both connected with the MCU controller, the MCU controller is connected with a plurality of groups of equalizing modules through an optical coupling isolation circuit, and the equalizing modules in the groups are respectively connected with a single battery in the battery pack.
Preferably, the GPS positioning module is a communication positioning module with wireless network communication.
Preferably, each of the balancing modules includes a transformer and a DC/AC circuit, one set of coils of the transformer is connected with the DC/AC circuit, the other set of coils of the transformer is connected with the bus, the transformer is a T39Q2510 transformer, and the coils of the transformer connected with the DC/AC circuit are high-power annular double inductors.
Preferably, the DC/AC circuit includes a first MOS transistor, a second MOS transistor, and a first inductor, a drain of the first MOS transistor is connected to the transformer, a gate of the first MOS transistor is connected to the opto-isolator circuit through a first diode, a gate of the first MOS transistor is connected to a gate of the second MOS transistor through a first resistor and a tenth resistor connected in series in sequence, the first resistor and the tenth resistor are connected to the transformer through a fifth resistor, and are connected to sources of the first MOS transistor and the second MOS transistor through a fourth resistor, a gate of the second MOS transistor is connected to a drain of the first MOS transistor through a third resistor and a first capacitor connected in series in sequence, and is connected to the opto-isolator circuit through a second diode, the third resistor and the first capacitor connected in series are connected in parallel to a third diode, and a drain of the second MOS transistor is connected to the first diode through the fourth diode, the fourth diode is connected in parallel with a fifth capacitor and a sixth resistor which are sequentially connected in series, the source electrode of the second MOS tube is connected to the two ends of the first inductor through a seventh capacitor and an eighth capacitor respectively, the source electrode of the second MOS tube is connected with the negative electrode of a single battery in the battery pack and is connected with the optical coupling isolation circuit, the first inductor is connected with the positive electrode of the single battery in the battery pack and is connected with the optical coupling isolation circuit, and the first inductor is connected in parallel with a fifth diode and is connected with the source electrode of the second MOS tube in the next DC/AC circuit through the fifth diode.
Preferably, the first MOS transistor and the second MOS transistor both adopt TPN2R203NC transistors, and the first diode and the second diode adopt BAT54C diodes.
Preferably, the optical coupling isolation circuit comprises a first optical coupler and second optical couplers, the number of the second optical couplers is equal to that of the DC/AC circuits, one end of the first optical coupler is connected with the MCU controller, the other end of the first optical coupler is connected with the second optical couplers which are sequentially connected in series, and the second optical couplers are respectively connected with the corresponding DC/AC circuits.
Preferably, the first optical coupler and the second optical coupler are both EL357NC optical couplers.
Preferably, the PCB board is a double-sided routing PCB board.
Due to the adoption of the scheme, the energy balance of the single energy storage battery is respectively and correspondingly managed by the plurality of groups of balance modules, so that the voltage ratio between the balance lines is K1: K2: K3: … … Kn:1; and moreover, by utilizing the GPS module and the Bluetooth 4.2 module, the working dynamic position of the battery pack and the working on and off can be detected through a background.
Drawings
Fig. 1 is a schematic structural diagram of an embodiment of the present invention.
Fig. 2 is a schematic structural diagram of an overall equalization module according to an embodiment of the present invention.
Fig. 3 is a schematic structural diagram of a single equalization module according to an embodiment of the present invention.
Fig. 4 is a schematic circuit structure diagram of the optical coupler isolation circuit according to the embodiment of the present invention.
Detailed Description
The embodiments of the utility model will be described in detail below with reference to the drawings, but the utility model can be implemented in many different ways as defined and covered by the claims.
As shown in fig. 1 to 4, the battery equalization system based on a wireless network provided in this embodiment includes a battery pack and a PCB board, on which an MCU controller for sorting signals and implementing data control output, a bluetooth 4.2 module for bluetooth wireless communication, a GPS positioning module for transmitting bit information in real time, and a plurality of sets of equalization modules for battery operation equalization processing are integrated;
the Bluetooth 4.2 module and the GPS positioning module are both connected with the MCU controller, the MCU controller is connected with a plurality of groups of equalizing modules through the optical coupling isolation circuit, and the plurality of groups of equalizing modules are respectively connected with a single battery in the battery pack.
The energy balance control system comprises a plurality of groups of balance modules, a bidirectional DC/AC circuit and a transformer, wherein the DC positive and negative poles of the DC/AC are connected with the positive and negative poles of a single battery, the AC is connected with two groups of voltage-sharing coils of the transformer, the transformer is also provided with a group of voltage-transformation assembly buses, and the energy balance is carried out with other balance modules, so that the voltage ratio between the balance lines is K1: K2: K3: … … Kn:1, the error voltage of the balance voltage is less than 0.05V; and moreover, by utilizing the GPS module and the Bluetooth 4.2 module, the working dynamic position of the battery pack and the working on and off can be detected through a background.
Furthermore, each balancing module comprises a transformer and a DC/AC circuit, one group of coils of the transformer is connected with the DC/AC circuit, the other group of coils of the transformer is connected with a bus, the transformer is a T39Q2510 transformer, the coils of the transformer connected with the DC/AC circuit are high-power annular double inductors, and the wires of the coils are QZY-180 wires, so that the balancing module has the characteristics of high insulation degree and burnout prevention.
Further, the DC/AC circuit includes a first MOS transistor Q1, a second MOS transistor Q3 and a first inductor L3, the drain of the first MOS transistor Q1 is connected to the transformer, the gate of the first MOS transistor Q1 is connected to the optical coupling isolation circuit through a first diode D2, the gate of the first MOS transistor Q1 is connected to the gate of the second MOS transistor Q3 through a first resistor R1 and a tenth resistor R10 which are sequentially connected in series, the first resistor R1 and the tenth resistor R5 8 are connected to the transformer through a fifth resistor R6, the first MOS transistor Q1 and the source of the second MOS transistor Q3 through a fourth resistor R4, the gate of the second MOS transistor Q3 is connected to the drain of the first MOS transistor Q1 through a third resistor R3 and a first capacitor C1 which are sequentially connected in series, the drain of the second MOS transistor Q1 is connected to the optical coupling isolation circuit through a second diode D1, the drain of the first diode VD1 and the first diode VD1 are connected in parallel with the first capacitor C1, the drain of the first diode VD1 and the diode 1, the fourth diode VD2 is connected in parallel with a fifth capacitor C5 and a sixth resistor R6 which are sequentially connected in series, the source electrode of the second MOS tube Q3 is respectively connected to two ends of the first inductor L3 through a seventh capacitor C7 and an eighth capacitor C8, the source electrode of the second MOS tube Q3 is connected with the negative electrode of a single battery in the battery pack and is connected with the optical coupling isolation circuit, the first inductor L3 is connected with the positive electrode of the single battery in the battery pack and is connected with the optical coupling isolation circuit, the first inductor L3 is connected in parallel with a fifth diode VD5 and is connected with the source electrode of the second MOS tube Q3 in the next DC/AC circuit through a fifth diode VD5, and the diameter of the inductance line of the first inductor L3 is 0.8 MM.
The working principle of the DC/AC circuit of the embodiment is as follows: after voltage division is performed on the fourth resistor R4 and the fifth resistor R5, the grid electrode of the first MOS transistor Q1 is at a high level through the first resistor R1, the source electrode and the drain electrode of the first MOS transistor Q1 are conducted, power is supplied to pins 1 and 2 of the transformer L1, meanwhile, the grid electrode of the second MOS transistor Q3 is at a low level through the first capacitor C1 and the tenth resistor R10, and the source electrode and the drain electrode of the second MOS transistor Q3 are disconnected. When the first capacitor C1 is fully charged, the gate of the second MOS transistor Q3 is turned off and pulled low, and then the voltage of the fourth resistor R4 and the fifth resistor R5 is divided and then the high level of the gate of the second MOS transistor Q3 is provided by the tenth resistor R10, so that the source and the drain of the second MOS transistor Q3 are turned on, power is supplied to the 3 and 4 pins of the transformer L1, and simultaneously the gate of the first MOS transistor Q1 is at the low level by the fifth capacitor C5 and the sixth resistor R6, so that the source and the drain of the first MOS transistor Q1 are turned off. The principle is repeated to generate oscillation for the transformer to work, three groups of line inductances of the transformer are the same, and generated voltages are equal. When other battery voltages are different, the voltage is applied to the 5 and 6-pin coil buses loaded to the transformer L1, the battery is charged after the high voltage is supplied to the first MOS transistor Q1 and the second MOS transistor Q3 of the AC/DC through the 1, 2, 3 and 4 pins of the transformer L1, and the alternating current voltage is supplied to the buses after the low voltage is supplied to the transformer through the first MOS transistor Q1 and the second MOS transistor Q3 of the DC/AC.
The control working principle is that the second diode (double diode) D1 pulls down the gates of the first MOS transistor Q1 and the second MOS transistor Q3, so that the sources and the drains of the first MOS transistor Q1 and the second MOS transistor Q3 are disconnected, and the circuit does not work any more.
Further, the first MOS transistor Q1 and the second MOS transistor Q3 both use TPN2R203NC transistors, and the first diode D2 and the second diode D1 use BAT54C diodes.
Further, the optical coupling isolation circuit comprises a first optical coupler U9 and a second optical coupler U5, the number of the second optical coupler U9 is equal to that of the DC/AC circuit, one end of the first optical coupler U9 is connected with the MCU controller, the other end of the first optical coupler U9 is connected with a second optical coupler U5 which is sequentially connected in series, and the second optical coupler U5 is respectively connected with the corresponding DC/AC circuit.
Further, the first optical coupler U9 and the second optical coupler U5 are both EL357NC optical couplers.
Furthermore, the PCB board is a double-sided wiring PCB board.
In the circuit of the embodiment, the following beneficial effects are achieved:
firstly, the transformer adopts a high-power annular double inductor, the inductive current can reach 15A, but the conventional inductor only has more than 10A, and when the internal resistance is small, the inductor does not generate heat when working in a large circuit and has high efficiency.
The first MOS tube Q1 and the second MOS tube Q3 both adopt TPN2R203NC transistors which are 100A high-power tubes of Toshiba japonica, the internal resistance is only 1.8 milliohms, so that the transistors do not generate heat when working under large current, the overall temperature is further reduced, surge current impact can be prevented, and an external adapter (voltage stabilizer) is not needed;
the PCB is a double-sided wiring PCB, so that heating caused by circuit loss is effectively reduced, and the temperature is further reduced;
fourthly, the whole circuit works at low frequency, the loss of circuit elements is reduced, the heating caused by working current is reduced, and the current is less than 1mA in standby.
In addition, the integrated circuit board is integrated in the embodiment, and the integrated circuit board has small internal resistance and small voltage difference, so that the problem that the number of the switching modules is increased due to overlarge voltage difference after the discrete modules are connected in series with a plurality of battery packs is solved. And the integrated board is difficult to generate self-excitation to make oscillation more stable because of the short wiring of the integrated circuit, and the problem that MOS tubes can be burnt in random wiring sequence when the battery is assembled by the current discrete module is solved.
The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.

Claims (8)

1. A battery equalization system based on wireless network is characterized in that: the battery pack comprises a battery pack and a PCB, wherein an MCU controller for sorting signals and realizing data control output, a Bluetooth 4.2 module for Bluetooth wireless communication, a GPS positioning module for sending bit information in real time and a plurality of groups of balancing modules for battery work balancing processing are integrated on the PCB;
the Bluetooth 4.2 module and the GPS positioning module are both connected with the MCU controller, the MCU controller is connected with a plurality of groups of equalizing modules through an optical coupling isolation circuit, and the equalizing modules in the groups are respectively connected with a single battery in the battery pack.
2. The wireless network based battery equalization system of claim 1, wherein: each balancing module comprises a transformer and a DC/AC circuit, one group of coils of the transformer is connected with the DC/AC circuit, the other group of coils of the transformer is connected with a bus, the transformer is a T39Q2510 transformer, and the coils of the transformer connected with the DC/AC circuit are high-power annular double inductors.
3. A wireless network based battery equalization system as claimed in claim 2 wherein: the DC/AC circuit comprises a first MOS tube, a second MOS tube and a first inductor, wherein the drain electrode of the first MOS tube is connected with a transformer, the grid electrode of the first MOS tube is connected with an optical coupling isolation circuit through a first diode, the grid electrode of the first MOS tube is connected with the grid electrode of the second MOS tube through a first resistor and a tenth resistor which are sequentially connected in series, the first resistor and the tenth resistor are connected with the transformer through a fifth resistor and are connected with the source electrodes of the first MOS tube and the second MOS tube through a fourth resistor, the grid electrode of the second MOS tube is connected with the drain electrode of the first MOS tube through a third resistor and a first capacitor which are sequentially connected in series and is connected with the optical coupling isolation circuit through a second diode, the third resistor and the first capacitor which are connected in series are connected in parallel to form a third diode, the drain electrode of the second MOS tube is connected with the first diode through a fourth diode, and the fourth diode is connected in parallel to form a fifth capacitor and a sixth resistor which are sequentially connected in series, the source electrode of the second MOS tube is connected to two ends of the first inductor through a seventh capacitor and an eighth capacitor respectively, the source electrode of the second MOS tube is connected with the negative electrode of a single battery in the battery pack and is connected with the optical coupling isolation circuit, the first inductor is connected with the positive electrode of the single battery in the battery pack and is connected with the optical coupling isolation circuit, and the first inductor is connected with a fifth diode in parallel and is connected with the source electrode of the second MOS tube in the next DC/AC circuit through the fifth diode.
4. A wireless network based battery equalization system as claimed in claim 3 wherein: the first MOS tube and the second MOS tube both adopt TPN2R203NC transistors, and the first diode and the second diode adopt BAT54C diodes.
5. The wireless network based battery equalization system of claim 4, wherein: the optical coupler isolation circuit comprises a first optical coupler and second optical couplers, the number of the second optical couplers is equal to that of the DC/AC circuits, one end of the first optical coupler is connected with the MCU controller, the other end of the first optical coupler is connected with the second optical couplers which are sequentially connected in series, and the second optical couplers are respectively connected with the corresponding DC/AC circuits.
6. The wireless network based battery equalization system of claim 5, wherein: the first optical coupler and the second optical coupler are EL357NC optical couplers.
7. The wireless network based battery equalization system of claim 6, wherein: the PCB board is a double-sided wiring PCB board.
8. The wireless-network-based battery equalization system of claim 1, wherein: the GPS positioning module is a communication positioning module with wireless network communication.
CN202220010020.7U 2022-01-05 2022-01-05 Battery equalization system based on wireless network Active CN216672648U (en)

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Application Number Priority Date Filing Date Title
CN202220010020.7U CN216672648U (en) 2022-01-05 2022-01-05 Battery equalization system based on wireless network

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CN216672648U true CN216672648U (en) 2022-06-03

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