CN219611368U - Storage battery balancing device - Google Patents
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- CN219611368U CN219611368U CN202320198313.7U CN202320198313U CN219611368U CN 219611368 U CN219611368 U CN 219611368U CN 202320198313 U CN202320198313 U CN 202320198313U CN 219611368 U CN219611368 U CN 219611368U
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- 230000002035 prolonged effect Effects 0.000 abstract description 3
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- 230000008569 process Effects 0.000 description 16
- 238000007599 discharging Methods 0.000 description 10
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- 230000003111 delayed effect Effects 0.000 description 2
- 238000004146 energy storage Methods 0.000 description 2
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- 238000004073 vulcanization Methods 0.000 description 2
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- 238000004134 energy conservation Methods 0.000 description 1
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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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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Abstract
The utility model discloses a storage battery balancing device, which comprises a controller with an isolation module and at least one balancing unit; the balancing unit is used for balancing the two storage batteries connected in series; each equalization unit comprises two voltage comparators, an inductance element, two MOS tubes and two resistors with the same resistance value. The storage battery equalization device provided by the utility model adopts the switching inductance equalization principle, and has the characteristics of simple control logic, low cost, convenience in installation and the like. After the voltage of the storage battery is actively balanced, the phenomena of overcharging, overdischarging and undercharging of the storage battery are effectively avoided, and the service life of the storage battery pack is prolonged. Compared with passive equalization, the active equalization mode can also save energy in the storage battery pack, and equalization effect is realized in a short time, so that the discharge efficiency of the storage battery is improved.
Description
Technical Field
The utility model relates to the technical field of storage battery energy storage, in particular to a storage battery balancing device.
Background
Because of the relatively low cell voltages, single cells are often used in series in the form of a battery pack in applications. For the single batteries in the storage battery pack, due to the difference of internal resistance and capacity decay rate of the storage battery, self-discharge condition, environmental temperature change and single battery charge acceptance, the single batteries are easy to cause overvoltage or undervoltage of the individual single batteries in the charging and discharging processes, so that the inconsistency of single voltages is caused. When a certain battery is low or high in a plurality of batteries connected in series, the whole group of batteries connected in series can stop charging and discharging due to the barrel effect, and after multiple times of charging and discharging, the difference of the single batteries is further enlarged, so that the single voltage of the battery pack is either overcharged or undercharged, even overdischarged, and malignant circulation is caused. The long-term continuous charge and discharge operation will have adverse effect on the use of the battery pack, and at this time, it is necessary to separately balance the batteries with large voltage differences.
The equalization mode of the storage battery pack mainly achieves the consistency of each battery through energy dissipation. The energy dissipation type equalization mode is also called passive equalization, wherein the passive equalization is to consume the single battery with high voltage in the form of heat energy, obviously, the equalization mode can cause energy loss, the equalization current of the passive equalization mode is smaller, and the short-term equalization effect of the equalization mode is not obvious for a large-capacity battery.
The active equalization mode is an energy relocation process, which discharges the high-voltage single batteries in the whole string of battery packs, and the released energy charges the low-voltage single batteries. The active equalization mode can realize the rapid equalization of large current of the storage battery, compared with the passive equalization mode, the time required by active equalization is greatly shortened, and the equalization efficiency can be improved. Therefore, the equalization mode can prolong the discharge time of the storage battery, improve the discharge efficiency, prolong the service life of the storage battery and finally achieve the effects of energy conservation and emission reduction.
The existing active equalization mode mainly adopts a transformer equalization mode, the installation structure and the control logic are complex, and the actual operation is not convenient enough.
Disclosure of Invention
The utility model aims to provide a storage battery balancing device, which utilizes an inductance element as an energy storage element to realize active balancing of a storage battery pack, has the characteristics of convenience in installation, simplicity in control logic, low cost and the like, can effectively improve the discharge efficiency of a storage battery, and prolongs the service life of the storage battery pack.
In order to solve the technical problems, the embodiment of the utility model provides the following scheme:
a battery equalization apparatus comprising a controller with an isolation module and at least one equalization unit; the balancing unit is used for balancing the two storage batteries connected in series; each equalization unit comprises two voltage comparators, an inductance element, two MOS tubes and two resistors with the same resistance value;
wherein a first one of the equalization units in the battery equalization apparatus includes: the first voltage comparator, the second voltage comparator, the first inductance element, the first MOS tube, the second MOS tube, and the first resistor and the second resistor with the same resistance value;
the two batteries connected in series are a first battery and a second battery; the first storage battery, the first inductance element and the first MOS tube form a first loop; the second storage battery, the first inductance element and the second MOS tube form a second loop;
the first resistor and the second resistor are connected in series between the positive electrode of the second storage battery and the negative electrode of the first storage battery, a first voltage division output end is led out between the first resistor and the second resistor, the first voltage division output end is connected with the negative input ends of the first voltage comparator and the second voltage comparator, the positive input end of the first voltage comparator is connected with the positive electrode of the first storage battery, the positive input end of the second voltage comparator is connected with the positive electrode of the second storage battery, and the output ends of the first voltage comparator and the second voltage comparator are connected with the controller;
one end of the first inductance element is connected with the anode of the first storage battery and the cathode of the second storage battery, the other end of the first inductance element is connected with the drain electrode of the first MOS tube and the source electrode of the second MOS tube, the source electrode of the first MOS tube is connected with the cathode of the first storage battery, the drain electrode of the second MOS tube is connected with the anode of the second storage battery, and the grid electrodes of the first MOS tube and the second MOS tube are connected with the controller.
Preferably, the battery equalization device further comprises a second equalization unit, and the second equalization unit is used for equalizing the second battery and the third battery which are connected in series;
the second equalization unit comprises a third voltage comparator, a fourth voltage comparator, a second inductance element, a third MOS tube, a fourth MOS tube, and a third resistor and a fourth resistor with the same resistance value;
wherein the second storage battery, the second inductance element and the third MOS tube form a third loop; the third storage battery, the second inductance element and the fourth MOS tube form a fourth loop;
the third resistor and the fourth resistor are connected in series between the cathode of the second storage battery and the anode of the third storage battery, a second voltage division output end is led out between the third resistor and the fourth resistor, the second voltage division output end is connected with the negative input ends of the third voltage comparator and the fourth voltage comparator, the positive input end of the third voltage comparator is connected with the anode of the second storage battery, the positive input end of the fourth voltage comparator is connected with the anode of the third storage battery, and the output ends of the third voltage comparator and the fourth voltage comparator are connected with the controller;
one end of the second inductance element is connected with the anode of the second storage battery and the cathode of the third storage battery, the other end of the second inductance element is connected with the drain electrode of the third MOS tube and the source electrode of the fourth MOS tube, the source electrode of the third MOS tube is connected with the cathode of the second storage battery, the drain electrode of the fourth MOS tube is connected with the anode of the third storage battery, and the grid electrodes of the third MOS tube and the fourth MOS tube are connected with the controller.
Preferably, the resistances of the first resistor, the second resistor, the third resistor, and the fourth resistor are equal.
Preferably, the isolation module is configured to isolate the controller from the output end of each voltage comparator and the gate of each MOS transistor, so as to improve EMC performance and anti-interference capability of the battery equalization device.
The technical scheme provided by the embodiment of the utility model has the beneficial effects that at least:
in the embodiment of the utility model, the storage battery equalization device adopts a switching inductance equalization principle, and compared with a transformer equalization mode, the switching inductance equalization mode has the characteristics of simple control logic, low cost, convenience in installation and the like. After the storage battery voltage is actively balanced, any storage battery in the storage battery pack cannot be overcharged, overdischarged or undercharged, so that the damage of a battery pole plate is delayed, the vulcanization inside the storage battery is prevented, and the service life of the whole storage battery pack is prolonged. The storage battery balancing device can reduce the maintenance workload of the storage battery, thereby saving unnecessary expenses. Compared with passive equalization, the active equalization mode can also save energy in the storage battery pack, and equalization effect is realized in a short time, so that the equalization of the whole storage battery pack is achieved, and further, the discharge efficiency of the storage battery is improved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings required for the description of the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a passive equalization approach;
fig. 2 is a schematic structural diagram of a battery equalization apparatus according to an embodiment of the present utility model.
While specific structures and devices are shown in the drawings to enable a clear implementation of embodiments of the utility model, this is for illustrative purposes only and is not intended to limit the utility model to the specific structures, devices and environments, which may be modified or adapted by those skilled in the art, depending on the specific needs, and which remain within the scope of the utility model.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the present utility model more apparent, the embodiments of the present utility model will be described in further detail with reference to the accompanying drawings.
A schematic diagram of the passive equalization mode is shown in fig. 1, and the equalization part of each single battery is composed of an independent control unit, a switch and a resistor. When the voltage of any single battery in the battery pack exceeds a set threshold value, the control unit closes the switch to form an independent discharging loop, and the heat generated by the current flowing through the resistor consumes redundant energy of the battery. The voltage of the single battery is slowly reduced in the discharging process, so that the time required by the equalizing mode is longer, and when the voltage of the single battery is smaller than a set value threshold value, the control unit turns on the switch to stop the equalizing operation. Through the balancing operation, the battery cells in the battery pack are in a dynamic balance state, and finally the purpose of balancing is achieved. Therefore, the passive equalization is to dissipate heat of the battery with high voltage and high capacity to lower the voltage and capacity difference of other batteries, and the whole passive equalization process is the energy dissipation process.
The embodiment of the utility model provides a storage battery balancing device, as shown in fig. 2, which comprises a controller with an isolation module and at least one balancing unit; the balancing unit is used for balancing the two storage batteries connected in series; each equalization unit comprises two voltage comparators, an inductance element, two MOS tubes and two resistors with the same resistance value.
Wherein a first one of the equalization units in the battery equalization apparatus includes: the first voltage comparator U1, the second voltage comparator U2, the first inductance element L1, the first MOS tube Q1, the second MOS tube Q2, and the first resistor R1 and the second resistor R2 with the same resistance value.
The two batteries connected in series are a first battery B1 and a second battery B2; the first storage battery B1, the first inductance element L1 and the first MOS tube Q1 form a first loop; the second storage battery B2, the first inductance element L1 and the second MOS transistor Q2 form a second circuit.
The first resistor R1 and the second resistor R2 are connected in series between the positive electrode (d point) of the second storage battery B2 and the negative electrode (B0 point) of the first storage battery B1, a first voltage division output end Ve0 is led out between the first resistor R1 and the second resistor R2, the first voltage division output end Ve0 is connected with the negative input ends of the first voltage comparator U1 and the second voltage comparator U2, the positive input end of the first voltage comparator U1 is connected with the positive electrode (a point) of the first storage battery B1, the positive input end of the second voltage comparator U2 is connected with the positive electrode (d point) of the second storage battery B2, and the output ends of the first voltage comparator U1 and the second voltage comparator U2 are connected with the controller.
One end of the first inductance element L1 is connected with the positive electrode of the first storage battery B1 and the negative electrode (point a) of the second storage battery B2, the other end of the first inductance element L1 is connected with the drain electrode of the first MOS tube Q1 and the source electrode of the second MOS tube Q2, the source electrode of the first MOS tube Q1 is connected with the negative electrode (point B0) of the first storage battery B1, the drain electrode of the second MOS tube Q2 is connected with the positive electrode (point d) of the second storage battery B2, and the grid electrodes of the first MOS tube Q1 and the second MOS tube Q2 are connected with the controller.
Further, the battery equalization device further comprises a second equalization unit, and the second equalization unit is used for equalizing the second battery B2 and the third battery B3 which are connected in series.
The second equalizing unit comprises a third voltage comparator U3, a fourth voltage comparator U4, a second inductance element L2, a third MOS tube Q3, a fourth MOS tube Q4, and a third resistor R3 and a fourth resistor R4 with the same resistance value.
The second storage battery B2, the second inductance element L2 and the third MOS tube Q3 form a third loop; the third storage battery B3, the second inductance element L2, and the fourth MOS transistor Q4 form a fourth loop.
The third resistor R3 and the fourth resistor R4 are connected in series between the negative electrode (point a) of the second storage battery B2 and the positive electrode of the third storage battery B3, a second voltage division output end Ve1 is led out between the third resistor R3 and the fourth resistor R4, the second voltage division output end Ve1 is connected with the negative input ends of the third voltage comparator U3 and the fourth voltage comparator U4, the positive input end of the third voltage comparator U3 is connected with the positive electrode (point d) of the second storage battery B2, the positive input end of the fourth voltage comparator U4 is connected with the positive electrode of the third storage battery B3, and the output ends of the third voltage comparator U3 and the fourth voltage comparator U4 are connected with the controller.
One end of the second inductance element L2 is connected with the anode of the second storage battery B2 and the cathode (d point) of the third storage battery, the other end of the second inductance element L2 is connected with the drain electrode of the third MOS tube Q3 and the source electrode of the fourth MOS tube Q4, the source electrode of the third MOS tube Q3 is connected with the cathode (a point) of the second storage battery B2, the drain electrode of the fourth MOS tube Q4 is connected with the anode of the third storage battery B3, and the grid electrodes of the third MOS tube and the fourth MOS tube are connected with the controller.
Similarly, for the case of serial connection of a plurality of batteries B1, B2, B3, B4, B5., corresponding equalization units may be added, and will not be described here again.
In the embodiment of the present utility model, the first resistor R1, the second resistor R2, the third resistor R3, and the fourth resistor R4 may be set to have equal resistance values. In the controller with the isolation module, the isolation module is used for completely isolating the controller from the output end of each voltage comparator and the grid electrode of each MOS tube so as to improve the EMC performance and the anti-interference capability of the storage battery equalization device. The controller with the isolation module can be a controller existing in the market, and the model of the controller is not limited.
Specifically, the working process of the storage battery equalization device provided by the utility model is as follows:
the resistances of the resistors R1, R2, R3 and R4 are set to be equal, the lower part of the second resistor R2 is connected with the cathode B0 of the first storage battery B1, the d point voltage is the sum of two storage battery voltages of B1 and B2, so that the voltage value of Ve0 after the d point voltage is divided by the two resistors R1 and R2 is equal to the average value of the sum of the two storage battery voltages. The lower part of the fourth resistor R4 is connected with the negative electrode a of the second storage battery B2, the voltage of the negative electrode a is Ua, and the Ve1 is the average voltage of the two batteries after the voltage sum of the second storage battery B2 and the third storage battery B3 is divided by the resistors R2 and R3.
When the voltage value of the first storage battery B1 is greater than that of the second storage battery B2, the voltage value of the first storage battery B1 is the point a voltage value, the voltage value of Ve0 is smaller than the point a voltage value, so that the output end In1 of the first voltage comparator U1 outputs high level, the high level is acquired by the controller through the isolation module of the controller, the controller starts an equalizing function, outputs control signals to the grids of the MOS tubes Q1 and Q2 through the isolation module, opens the first MOS tube Q1, closes the second MOS tube Q2, enables the first storage battery B1 to perform discharging operation, and current flows from the point a of the first storage battery B1 to the point B through the first inductance element L1 and then flows through the first MOS tube Q1 to form a closed discharging loop, and finally the first inductance element L1 completes a process of storing energy. Then, the controller turns off the first MOS tube Q1, turns on the second MOS tube Q2, and the first inductance element L1 passes through the second MOS tube Q2 from the point B to the positive electrode of the second storage battery B2 to complete a closed charging loop.
And when the voltage value of the first storage battery B1 is equal to the voltage value of the second storage battery B2, the voltage comparators U1 and U2 output low level, and the controller controls the MOS transistors Q1 and Q2 according to the collected level state to turn off the two MOS transistors Q1 and Q2. In the equalization process, the two MOS transistors Q1 and Q2 cannot be opened at the same time. The discharging and charging processes described above have little energy loss and the balancing current is much greater than passive balancing. Compared with passive equalization, the equalization effect of active equalization is displayed quickly.
When the voltage value of the second battery B2 is greater than the voltage value of the third battery B3, the equalization process thereof coincides with when the voltage value of the first battery B1 is greater than the voltage value of the second battery B2.
When the voltage value of the first storage battery B1 is smaller than that of the second storage battery B2, the voltage value of Ve0 is smaller than that of d point, so that the output end In2 of the second voltage comparator U2 outputs high level, the high level is collected by the controller through an isolation module of the controller, the controller starts an equalizing function, outputs control signals to grids of the MOS transistors Q1 and Q2 through the isolation module, the second MOS transistor Q2 is opened, the first MOS transistor Q1 is turned off, the second storage battery B2 is subjected to discharging operation, current flows from the d point of the second storage battery B2 to the B point of the first inductance element L1 through the second MOS transistor Q2, finally, the current flows to the negative electrode of the second storage battery B2 to form a closed discharging loop, and finally the first inductance element L1 finishes the process of storing electric energy. Then, the controller turns off the second MOS transistor Q2, turns on the first MOS transistor Q1, and the first inductance element L1 passes the stored energy from the point a to the source electrode of the first storage battery B1 and then to the point B to complete a closed charging loop.
When the voltage value of the second battery B2 is smaller than the voltage value of the third battery B3, the equalization process thereof coincides with when the voltage value of the first battery B1 is smaller than the voltage value of the second battery B2.
When the voltage values of the two storage batteries B1 and B2 are equal, the voltage comparators U1 and U2 output low level, in1 and In2 are collected by the controller through the isolation module to acquire the state condition of the pins, and the controller outputs signals to the grid electrode of the MOS tube through the isolation module, so that the Q1 and the Q2 are In an off state, and the voltages of the two storage batteries are consistent without starting an equalization function.
When the voltage values of the two storage batteries B2 and B3 are equal, the voltage comparators U3 and U4 output low level, in3 and In4 are collected by the controller through the isolation module to acquire the state condition of the pins, and the controller outputs signals to the grid electrode of the MOS tube through the isolation module, so that the Q3 and Q4 are In an off state, and the voltages of the two storage batteries are consistent without starting an equalization function.
The operation is completed repeatedly, so that the storage battery pack is always in a dynamic equilibrium state.
In the embodiment of the utility model, the storage battery equalization device adopts a switching inductance equalization principle, and compared with a transformer equalization mode, the switching inductance equalization mode has the characteristics of simple control logic, low cost, convenience in installation and the like.
The isolation module in the controller plays an important role in the storage battery balancing device, and because the device contains inductive load, the instant interference phenomenon possibly occurs in the high-frequency switching process, and the front stage and the rear stage are completely isolated after the controller adopts the isolation module, so that the controller is not influenced by the upper stage, and the EMC performance and the anti-interference capability of the storage battery balancing device are greatly improved.
After the storage battery voltage is actively balanced, any storage battery in the storage battery pack cannot be overcharged, overdischarged or undercharged, so that the damage of a battery pole plate is delayed, the vulcanization inside the storage battery is prevented, and the service life of the whole storage battery pack is prolonged. The storage battery balancing device can reduce the maintenance workload of the storage battery, thereby saving unnecessary expenses. Compared with passive equalization, the active equalization mode can also save energy in the storage battery pack, and realize equalization effect in a short time, so that the equalization of the whole storage battery pack is achieved, and further, the discharge efficiency of the storage battery is improved.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or terminal that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or terminal. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article or terminal device comprising the element.
References in the specification to "one embodiment," "an example embodiment," "some embodiments," etc., indicate that the embodiment described may include a particular feature, structure, or characteristic, but every embodiment may not necessarily include the particular feature, structure, or characteristic. Further, when a particular feature, structure, or characteristic is described in connection with an embodiment, it is submitted that it is within the knowledge of one skilled in the relevant art to effect such feature, structure, or characteristic in connection with other embodiments whether or not explicitly described.
Generally, the terminology may be understood, at least in part, from the use of context. For example, the term "one or more" as used herein may be used to describe any feature, structure, or characteristic in a singular sense, or may be used to describe a combination of features, structures, or characteristics in a plural sense, depending at least in part on the context. In addition, the term "based on" may be understood as not necessarily intended to convey an exclusive set of factors, but may instead, depending at least in part on the context, allow for other factors that are not necessarily explicitly described.
The utility model is intended to cover any alternatives, modifications, equivalents, and variations that fall within the spirit and scope of the utility model. In the following description of preferred embodiments of the utility model, specific details are set forth in order to provide a thorough understanding of the utility model, and the utility model will be fully understood to those skilled in the art without such details. In other instances, well-known methods, procedures, flows, components, circuits, and the like have not been described in detail so as not to unnecessarily obscure aspects of the present utility model.
Those of ordinary skill in the art will appreciate that all or a portion of the steps in implementing the methods of the embodiments described above may be implemented by a program that instructs associated hardware, and the program may be stored on a computer readable storage medium, such as: ROM/RAM, magnetic disks, optical disks, etc.
The foregoing description of the preferred embodiments of the utility model is not intended to limit the utility model to the precise form disclosed, and any such modifications, equivalents, and alternatives falling within the spirit and scope of the utility model are intended to be included within the scope of the utility model.
Claims (4)
1. A battery equalization device, characterized in that the battery equalization device comprises a controller with an isolation module and at least one equalization unit; the balancing unit is used for balancing the two storage batteries connected in series; each equalization unit comprises two voltage comparators, an inductance element, two MOS tubes and two resistors with the same resistance value;
wherein a first one of the equalization units in the battery equalization apparatus includes: the first voltage comparator, the second voltage comparator, the first inductance element, the first MOS tube, the second MOS tube, and the first resistor and the second resistor with the same resistance value;
the two batteries connected in series are a first battery and a second battery; the first storage battery, the first inductance element and the first MOS tube form a first loop; the second storage battery, the first inductance element and the second MOS tube form a second loop;
the first resistor and the second resistor are connected in series between the positive electrode of the second storage battery and the negative electrode of the first storage battery, a first voltage division output end is led out between the first resistor and the second resistor, the first voltage division output end is connected with the negative input ends of the first voltage comparator and the second voltage comparator, the positive input end of the first voltage comparator is connected with the positive electrode of the first storage battery, the positive input end of the second voltage comparator is connected with the positive electrode of the second storage battery, and the output ends of the first voltage comparator and the second voltage comparator are connected with the controller;
one end of the first inductance element is connected with the anode of the first storage battery and the cathode of the second storage battery, the other end of the first inductance element is connected with the drain electrode of the first MOS tube and the source electrode of the second MOS tube, the source electrode of the first MOS tube is connected with the cathode of the first storage battery, the drain electrode of the second MOS tube is connected with the anode of the second storage battery, and the grid electrodes of the first MOS tube and the second MOS tube are connected with the controller.
2. The battery equalization apparatus of claim 1, further comprising a second equalization unit for equalizing the second battery and the third battery in series;
the second equalization unit comprises a third voltage comparator, a fourth voltage comparator, a second inductance element, a third MOS tube, a fourth MOS tube, and a third resistor and a fourth resistor with the same resistance value;
wherein the second storage battery, the second inductance element and the third MOS tube form a third loop; the third storage battery, the second inductance element and the fourth MOS tube form a fourth loop;
the third resistor and the fourth resistor are connected in series between the cathode of the second storage battery and the anode of the third storage battery, a second voltage division output end is led out between the third resistor and the fourth resistor, the second voltage division output end is connected with the negative input ends of the third voltage comparator and the fourth voltage comparator, the positive input end of the third voltage comparator is connected with the anode of the second storage battery, the positive input end of the fourth voltage comparator is connected with the anode of the third storage battery, and the output ends of the third voltage comparator and the fourth voltage comparator are connected with the controller;
one end of the second inductance element is connected with the anode of the second storage battery and the cathode of the third storage battery, the other end of the second inductance element is connected with the drain electrode of the third MOS tube and the source electrode of the fourth MOS tube, the source electrode of the third MOS tube is connected with the cathode of the second storage battery, the drain electrode of the fourth MOS tube is connected with the anode of the third storage battery, and the grid electrodes of the third MOS tube and the fourth MOS tube are connected with the controller.
3. The battery equalization apparatus of claim 2, wherein the first resistor, the second resistor, the third resistor, and the fourth resistor have equal resistance values.
4. The battery equalization device of claim 1, wherein the isolation module is configured to isolate the controller from the output of each voltage comparator and the gate of each MOS transistor to improve EMC performance and anti-interference capability of the battery equalization device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320198313.7U CN219611368U (en) | 2023-02-13 | 2023-02-13 | Storage battery balancing device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320198313.7U CN219611368U (en) | 2023-02-13 | 2023-02-13 | Storage battery balancing device |
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| Publication Number | Publication Date |
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| CN219611368U true CN219611368U (en) | 2023-08-29 |
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| CN202320198313.7U Active CN219611368U (en) | 2023-02-13 | 2023-02-13 | Storage battery balancing device |
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| CN (1) | CN219611368U (en) |
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- 2023-02-13 CN CN202320198313.7U patent/CN219611368U/en active Active
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