CN218549548U - Storage battery management circuit and intelligent charging device - Google Patents
Storage battery management circuit and intelligent charging device Download PDFInfo
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- CN218549548U CN218549548U CN202222535336.0U CN202222535336U CN218549548U CN 218549548 U CN218549548 U CN 218549548U CN 202222535336 U CN202222535336 U CN 202222535336U CN 218549548 U CN218549548 U CN 218549548U
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Abstract
The utility model discloses a battery management circuit and intelligent charging device. The battery voltage state detection circuit outputs a first voltage signal representing the voltage state of the storage battery to the power management circuit and the control unit; the power supply management circuit provides a power supply signal for the control unit when receiving a first voltage signal which represents that the voltage state of the storage battery is lower than a preset voltage value; when the control unit receives the power supply signal and receives a first voltage signal indicating that the voltage state of the storage battery is lower than a preset voltage value, the control unit controls the storage battery to be charged. The utility model discloses can be through the accurate battery that judges under the present moment of battery voltage state detection circuitry whether be in the low pressure state to the control unit is receiving power signal and when receiving the first voltage signal who shows battery voltage state for being less than the default voltage value, can control to charge to the battery, thereby can the real-time supervision battery lack of power condition and in time charge.
Description
Technical Field
The utility model relates to a battery management technology field especially relates to a battery management circuit and intelligent charging device.
Background
With the shortage of traditional energy and the problem of environmental pollution, new energy is becoming a development trend as a power source of vehicles and engineering machinery, and the engineering machinery is also rapidly developed in an electromotion way. Taking an excavator as an example, the electric excavator is different from a traditional fuel excavator, adopts a storage battery as a driving power source, and has the advantages of no pollution, no noise, energy conservation and the like.
At present, electric excavator adopts 12V battery as its energy source mostly, parks for a long time and under the operating mode such as work, and the battery is easily insufficient for electricity, if the user can not in time obtain the electric quantity situation, when battery voltage is less than minimum voltage, will lead to the unable normal start of whole car, must change the battery or just can restart with the help of external power source.
The above is only for the purpose of assisting understanding of the technical solutions of the present invention, and does not represent an admission that the above is the prior art.
SUMMERY OF THE UTILITY MODEL
The utility model discloses a main aim at provides a battery management circuit and intelligent charging device, aims at solving the insufficient voltage condition of how real-time supervision battery and the technical problem who in time charges.
In order to achieve the above object, the present invention provides a battery management circuit, which at least comprises: the device comprises a battery voltage state detection circuit, a power management circuit and a control unit;
the battery voltage state detection circuit is respectively connected with the storage battery, the power management circuit and the control unit, and outputs a first voltage signal representing the voltage state of the storage battery to the power management circuit and the control unit;
the power management circuit is connected with the control unit and provides a power signal for the control unit when receiving a first voltage signal which represents that the voltage state of the storage battery is lower than a preset voltage value;
when the control unit receives the power supply signal and receives the first voltage signal which represents that the voltage state of the storage battery is lower than a preset voltage value, the control unit controls the storage battery to be charged.
Optionally, the power management circuit includes a wake-up circuit and a power system control circuit;
the wake-up circuit is respectively connected with the battery voltage state detection circuit and the power system control circuit;
the wake-up circuit receives a first voltage signal which is output by the battery voltage state detection circuit and represents the voltage state of the storage battery, and when the wake-up circuit receives the first voltage signal which represents that the voltage state of the storage battery is lower than a preset voltage value, the wake-up circuit outputs a second voltage signal which is used for waking up the power management circuit to the power system control circuit;
the power system control circuit is connected with the control unit, and the power management circuit provides a power signal for the control unit when receiving the second voltage signal.
Optionally, the power system control circuit includes a power system base chip, a first diode, a first capacitor, a first inductor, and a second capacitor;
the positive pole of the first diode is connected with the storage battery, the negative pole of the first diode is respectively connected with the first end of the first inductor and the positive pole of the first capacitor, the negative pole of the first capacitor is grounded, the second end of the first inductor is respectively connected with one input end of the power system basic chip and the positive pole of the second capacitor, the negative pole of the second capacitor is grounded, the wake-up circuit is connected with the other input end of the power system basic chip, and the output end of the power system basic chip is connected with the control unit.
Optionally, the wake-up circuit comprises: the circuit comprises a first resistor, a second resistor, a triode, a first MOS (metal oxide semiconductor) tube and a third resistor;
the first end of first resistance respectively with the battery with the drain electrode of first MOS pipe is connected, the second end of first resistance respectively with the first end of second resistance with the source electrode of first MOS pipe is connected, the second end of second resistance with the collecting electrode of triode is connected, the base of triode with battery voltage state detection circuitry connects, the projecting pole ground connection of triode, the source electrode of first MOS pipe respectively with electrical power generating system control circuit with the first end of third resistance is connected, the second end ground connection of third resistance.
Optionally, the control unit comprises a controller chip;
the controller chip is respectively connected with the battery voltage state detection circuit, the power management circuit and the storage battery.
Optionally, the controller further comprises a current converter connected with the control unit;
when the control unit receives the power supply signal and receives the first voltage signal which represents that the voltage state of the storage battery is lower than a preset voltage value, the control unit outputs a charging control signal to the current converter, and when the current converter receives the charging control signal, the current converter charges the storage battery.
Optionally, the battery voltage status detection circuit comprises a reference source circuit and a comparison circuit;
the reference source circuit is respectively connected with the storage battery and the comparison circuit, and outputs reference voltage to the comparison circuit according to the battery voltage provided by the storage battery;
the comparison circuit is respectively connected with the power management circuit and the control unit, and outputs a first voltage signal representing the voltage state of the storage battery to the power management circuit and the control unit according to the battery voltage and the reference voltage.
Optionally, the comparison circuit is a hysteresis comparison circuit.
Optionally, the battery voltage state detection circuit further includes a filter circuit;
the filter circuit is respectively connected with the storage battery and the reference source circuit, and is used for filtering the battery voltage provided by the storage battery and outputting the filtered voltage to the reference source circuit;
and the reference source circuit outputs a reference voltage to the comparison circuit according to the filtered voltage.
In order to achieve the above object, the utility model also provides an intelligent charging device, intelligent charging device includes as above battery management circuit.
In the utility model, the storage battery management circuit at least comprises a battery voltage state detection circuit, a power management circuit and a control unit; the battery voltage state detection circuit outputs a first voltage signal representing the voltage state of the storage battery to the power management circuit and the control unit; the power supply management circuit provides a power supply signal to the control unit when receiving a first voltage signal which represents that the voltage state of the storage battery is lower than a preset voltage value; when the control unit receives the power supply signal and receives a first voltage signal indicating that the voltage state of the storage battery is lower than a preset voltage value, the control unit controls the storage battery to be charged. The utility model discloses a when the control unit received power signal and received the first voltage signal that indicates that battery voltage state is for being less than preset magnitude of voltage, the control unit control charges the battery, can accurately judge whether the battery under the current moment is in the low pressure state through battery voltage state detection circuitry, and the control unit when receiving power signal and receiving the first voltage signal that indicates that battery voltage state is for being less than preset magnitude of voltage, can control to charge the battery, thereby can the insufficient voltage condition of real-time supervision battery and in time charge.
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 functional block diagram of a first embodiment of the battery management circuit of the present invention;
fig. 2 is a functional block diagram of a second embodiment of the battery management circuit of the present invention;
fig. 3 is a schematic diagram of a circuit structure of the power supply system control circuit of the present invention;
fig. 4 is a schematic diagram of the circuit structure of the wake-up circuit of the present invention;
fig. 5 is a functional block diagram of a third embodiment of the battery management circuit of the present invention;
fig. 6 is a schematic diagram of a circuit structure of the reference source circuit of the present invention;
fig. 7 is a schematic circuit diagram of the hysteresis comparison circuit of the present invention;
fig. 8 is a schematic diagram of the circuit structure of the filter circuit of the present invention.
The reference numbers illustrate:
| reference numerals | Name (R) | Reference numerals | Name (R) | |
| 10 | Battery voltage state detection circuit | R1～R15 | First to |
|
| 20 | Power management circuit | C1～C12 | First to |
|
| 30 | Control unit | D1～D5 | First to |
|
| 201 | Wake-up circuit | L1～L5 | First to |
|
| 202 | Power supply system control circuit | Q2～Q3 | First to |
|
| 101 | Reference source circuit | | Triode transistor | |
| 102 | Comparison circuit | U1 | Power supply system |
|
| 103 | Filter circuit | U2 | |
|
| 40 | Current converter | U3 | Voltage stabilization chip | |
| U4 | Voltage comparator |
The objects, features and advantages of the present invention will be further described with reference to the accompanying drawings.
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 of the present invention, all other embodiments obtained by a person skilled in the art without making creative efforts belong to the protection scope of the present invention.
It should be noted that all the directional indicators (such as up, down, left, right, front, back \8230;) in the embodiments 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 attached drawings), and if the specific posture is changed, the directional indicator is changed accordingly.
In addition, the descriptions related to "first", "second", etc. in the present invention are for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicit ly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions in the embodiments may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should not be considered to exist, and is not within the protection scope of the present invention.
The utility model provides a battery management circuit.
Referring to fig. 1, fig. 1 is a functional block diagram of a first embodiment of the battery management circuit of the present invention.
As shown in fig. 1, in the present embodiment, the battery management circuit includes at least: a battery voltage state detection circuit 10, a power management circuit 20, and a control unit 30;
the battery voltage state detection circuit 10 is connected to the storage battery, the power management circuit 20, and the control unit 30, respectively, and the battery voltage state detection circuit 10 outputs a first voltage signal indicating a voltage state of the storage battery to the power management circuit 20 and the control unit 30;
the storage battery may be mounted on a new energy vehicle, such as a construction machine vehicle and an electric excavator, and the voltage of the storage battery may be 12V or 13V, which is not particularly limited in this embodiment.
It can be understood that the battery voltage state detection circuit 10 can detect the voltage state of the battery, that is, detect the voltage level of the battery, and then output a first voltage signal according to the voltage level of the battery, where the first voltage signal can be the voltage level of the battery greater than a preset value or the voltage level of the battery less than the preset value, and transmit the first voltage signal to the power management circuit 20 and the control unit 30.
The power management circuit 20 is connected with the control unit 30, and when receiving a first voltage signal indicating that the voltage state of the storage battery is lower than a preset voltage value, the power management circuit 20 provides a power signal to the control unit 30;
it should be noted that the preset voltage value is a preset voltage value, which is equivalent to a reference voltage, after the voltage of the battery is compared with the preset voltage value, the battery voltage state detection circuit 10 may output a first voltage signal, and the power management circuit 20 may receive the first voltage signal indicating that the voltage state of the battery is lower than the preset voltage value or the first voltage signal indicating that the voltage state of the battery is higher than the preset voltage value.
It should be understood that when the power management circuit 20 receives a first voltage signal indicating that the voltage state of the secondary battery is lower than the preset voltage value, indicating that the secondary battery is in a power-deficient state at this time, the power management circuit 20 exits the low power consumption mode and provides a power signal to the control unit 30; when the power management circuit 20 receives the first voltage signal indicating that the voltage state of the storage battery is higher than the preset voltage value, the storage battery is not in a power-down state at the moment, and the power management circuit 20 keeps the low power consumption mode.
When the control unit 30 receives the power signal and receives the first voltage signal indicating that the voltage state of the storage battery is lower than the preset voltage value, the control unit 30 controls the storage battery to be charged.
It can be understood that when the control unit 30 receives the power signal and receives the first voltage signal indicating that the voltage state of the storage battery is lower than the preset voltage value, the control unit controls the high voltage battery to charge the storage battery, and detects the current to identify whether the storage battery is fully charged.
In the embodiment, the storage battery management circuit at least comprises a battery voltage state detection circuit, a power supply management circuit and a control unit; the battery voltage state detection circuit outputs a first voltage signal representing the voltage state of the storage battery to the power management circuit and the control unit; the power supply management circuit provides a power supply signal for the control unit when receiving a first voltage signal which represents that the voltage state of the storage battery is lower than a preset voltage value; when the control unit receives the power supply signal and receives a first voltage signal indicating that the voltage state of the storage battery is lower than a preset voltage value, the control unit controls the storage battery to be charged. This embodiment is through when control unit receives power signal and received and to express that the battery voltage state is for being less than the first voltage signal of default voltage value, control unit control charges the battery, can accurately judge whether the battery under the present moment is in the low pressure state through battery voltage state detection circuitry, and control unit is when receiving power signal and receiving and to express that the battery voltage state is for being less than the first voltage signal of default voltage value, can control and charge the battery, thereby can real-time supervision insufficient voltage condition and in time charge of battery.
Further, referring to fig. 2, fig. 2 is a functional block diagram of a second embodiment of the battery management circuit of the present invention.
As shown in fig. 2, in the present embodiment, the power management circuit 20 includes a wake-up circuit 201 and a power system control circuit 202;
the wake-up circuit 201 is connected with the battery voltage state detection circuit 10 and the power system control circuit 202 respectively;
the wake-up circuit 201 receives a first voltage signal which is output by the battery voltage state detection circuit 10 and represents a voltage state of the storage battery, and when the wake-up circuit 201 receives the first voltage signal which represents that the voltage state of the storage battery is lower than a preset voltage value, the wake-up circuit outputs a second voltage signal for waking up the power system control circuit 202 to the power system control circuit 202;
it can be understood that when the wake-up circuit 201 receives the first voltage signal indicating that the voltage state of the battery is lower than the preset voltage value, indicating that the battery is in a power-deficient state at this time, a second voltage signal for waking up the power system control circuit 202 needs to be output to the power system control circuit 202 to wake up the power system control circuit 202.
Further, referring to fig. 4, fig. 4 is a schematic circuit diagram of the wake-up circuit of the present invention. As shown in fig. 4, the wake-up circuit includes: the circuit comprises a first resistor R1, a second resistor R2, a triode Q1, a first MOS (metal oxide semiconductor) transistor Q2 and a third resistor R3;
the first end of the first resistor R1 is respectively connected with the storage battery and the drain electrode of the first MOS tube Q2, the second end of the first resistor R1 is respectively connected with the first end of the second resistor R2 and the source electrode of the first MOS tube Q2, the second end of the second resistor R2 is connected with the collector electrode of the triode Q1, the base electrode of the triode Q1 is connected with the battery voltage state detection circuit 10, the emitting electrode of the triode Q1 is grounded, the source electrode of the first MOS tube Q2 is respectively connected with the power supply system control circuit 202 and the first end of the third resistor R3, and the second end of the third resistor R3 is grounded.
It can be understood that the base of the triode Q1 is the output signal of the battery voltage state detection circuit 10, because the power system control circuit 202 has the IO port wake-up function, when the storage battery is normal, the base of the triode Q1 is low level, when the power is insufficient, the output is high level to control the conduction of the triode Q1, thereby making the first MOS transistor Q2 conducted, output high level (KL 30_ P), for reducing loss and power consumption, the resistance values of the first resistor R1 and the second resistor R2 are selected to make the VGS voltage drop larger as much as possible, for preventing the initial state from being indefinite, so the third resistor R3 of the pull-down resistor is connected at the output end, thereby realizing the power shortage wake-up function.
The power system control circuit 202 is connected to the control unit 30, and the power system control circuit 202 provides a power signal to the control unit 30 when receiving the second voltage signal.
Further, referring to fig. 3, fig. 3 is a schematic circuit structure diagram of the power supply system control circuit of the present invention. As shown in fig. 3, the power system control circuit 202 includes a power system base chip U1, a first diode D1, a first capacitor C1, a first inductor L1, and a second capacitor C2;
the positive pole of first diode D1 with the battery is connected, the negative pole of first diode D1 respectively with the first end of first inductance L1 with the positive pole of first electric capacity C1 is connected, the negative pole ground connection of first electric capacity C1, the second end of first inductance L1 respectively with electrical power generating system basis chip U1's an input with the positive pole of second electric capacity C2 is connected, the negative pole ground connection of second electric capacity C2, awaken circuit 201 with electrical power generating system basis chip U1's another input is connected, electrical power generating system basis chip U1's output with control unit 30 connects.
In a specific implementation, when the power system control circuit 202 receives the second voltage signal, the power system control circuit 202 may output low-voltage power supplies (such as 5v, 3v,1.9v, and the like), that is, provide power linearity, the first diode D1 is an anti-reverse diode, the first capacitor C1, the first inductor L1, and the second capacitor C12 form a pi filter circuit, and the power system base chip U1 may be an SBC controller.
Further, in the present embodiment, the control unit 30 includes a controller chip U2;
the controller chip U2 is connected to the battery voltage state detection circuit 10, the power management circuit 20, and the storage battery, respectively.
It is understood that the control unit 30 in the present embodiment may be a controller chip U2, and the controller chip U2 may be a VCU.
In this embodiment, the power management circuit includes a wake-up circuit and a power system control circuit; the wake-up circuit is respectively connected with the battery voltage state detection circuit and the power system control circuit; the wake-up circuit receives a first voltage signal which is output by the battery voltage state detection circuit and represents the voltage state of the storage battery, and when the wake-up circuit receives the first voltage signal which represents that the voltage state of the storage battery is lower than a preset voltage value, the wake-up circuit outputs a second voltage signal which is used for waking up the power management circuit to the power system control circuit; and the power supply system control circuit is connected with the control unit and provides a power supply signal for the control unit when receiving the second voltage signal. The wake-up circuit in this embodiment just is used for waking up to electrical power generating system control circuit output when receiving the first voltage signal that represents battery voltage state for being less than the default voltage value when the battery is insufficient voltage promptly electrical power supply management circuit's second voltage signal, electrical power generating system control circuit provides power supply signal for the control unit when receiving second voltage signal for electrical power generating system control circuit just works when the battery is insufficient voltage, further makes the control unit control charge to the battery.
Further, referring to fig. 5, fig. 5 is a functional block diagram of a third embodiment of the battery management circuit of the present invention.
As shown in fig. 5, in the present embodiment, the battery voltage state detection circuit 10 includes a reference source circuit 101 and a comparison circuit 102;
the reference source circuit 101 is connected to the battery and the comparator circuit 102, respectively, and the reference source circuit 101 outputs a reference voltage to the comparator circuit 102 according to a battery voltage provided by the battery;
it can be understood that the reference source circuit 101 in this embodiment may be an LDO circuit, and is configured to perform voltage conversion on the battery voltage provided by the battery, provide a stable voltage in real time, and provide a reference voltage for the comparison circuit 102. The +5V is a reference voltage obtained by passing a cell voltage supplied from the secondary battery through the reference source circuit 101.
Referring to fig. 6, fig. 6 is a schematic circuit structure diagram of the reference source circuit of the present invention. As shown in fig. 6, the reference source circuit 101 includes: a third capacitor C3, a fourth resistor R4, a fifth resistor R5, a voltage stabilizing chip U3, a sixth resistor R6, a seventh resistor R7 and a fourth capacitor C4;
the positive electrode of the third capacitor C3 is connected to the storage battery and the first end of the fourth resistor R4, the second end of the fourth resistor R4 is connected to the first end of the fifth resistor R5, the second end of the fifth resistor R5 is connected to the input end of the voltage stabilizing chip U3, the first end of the sixth resistor R6, the positive electrode of the fourth capacitor C4, and the comparing circuit 102, the output end of the voltage stabilizing chip U3 is connected to the second end of the sixth resistor R6 and the first end of the seventh resistor R7, and the negative electrode of the third capacitor C3, the ground terminal of the voltage stabilizing chip U3, the second end of the seventh resistor R7, and the negative electrode of the fourth capacitor C4 are grounded.
In specific implementation, the voltage regulation chip U3 may be an LDO chip, the fourth resistor R4 and the fifth resistor R5 are current limiting resistors, the sixth resistor R6 and the seventh resistor R7 are voltage dividing resistors, and the third capacitor C3 and the fourth capacitor C4 mainly function in voltage regulation and filtering.
The comparator circuit 102 is connected to the power management circuit 20 and the control unit 30, respectively, and the comparator circuit 102 outputs a first voltage signal indicating a voltage state of the secondary battery to the power management circuit 20 and the control unit 30 according to the battery voltage and the reference voltage.
It is understood that the comparison circuit 102 may output a first voltage signal indicating that the voltage state of the battery is lower than a preset voltage value, and may also output a first voltage signal indicating that the voltage state of the battery is higher than the preset voltage value.
Further, in the present embodiment, the comparison circuit 102 is a hysteresis comparison circuit.
Referring to fig. 7, fig. 7 is a schematic circuit diagram of the hysteresis comparison circuit of the present invention. As shown in fig. 7, the hysteresis comparison module 10 includes: an eighth resistor R8, a ninth resistor R9, a fifth capacitor C5, a second inductor L2, a sixth capacitor C6, a twelfth resistor R12, a tenth resistor R10, a voltage comparator U4, an eleventh resistor R11, a thirteenth resistor R13, a seventh capacitor C7 and a second diode D2;
a first end of the eighth resistor R8 is connected to the storage battery and the first end of the second inductor L2, a second end of the eighth resistor R8 is connected to the first end of the ninth resistor R9, the anode of the fifth capacitor C5, and the first input end of the voltage comparator U4, a second end of the ninth resistor R9 and the cathode of the fifth capacitor C5 are grounded, a second end of the second inductor L2 is connected to the anode of the sixth capacitor C6 and the power supply end of the voltage comparator U4, a first end of the twelfth resistor R12 is connected to the output end of the reference source circuit 101, a second end of the twelfth resistor R12 is connected to the first end of the eleventh resistor R11, a second end of the eleventh resistor R11 is connected to the first end of the tenth resistor R10 and the second input end of the voltage comparator U4, an output end of the voltage comparator U4 is connected to the first end of the thirteenth resistor R13, a second end of the thirteenth resistor R13 is connected to the cathode of the seventh resistor R7, the cathode of the capacitor C7 and the cathode of the capacitor C2 are grounded, and the second diode D2 is connected to the cathode of the seventh capacitor C7.
It should be understood that the threshold voltage of the hysteresis comparator circuit in this embodiment may be set to 4.5V-5V, corresponding to the battery voltage being 9V-10, and the hysteresis comparator circuit normally outputs the first voltage signal indicating that the voltage state of the battery is higher than the preset voltage value, and the hysteresis comparator circuit outputs the first voltage signal indicating that the voltage state of the battery is lower than the preset voltage value when the battery is in power-down.
It can be understood that, in this embodiment, the eighth resistor R8, the ninth resistor R9, the tenth resistor R10, and the eleventh resistor R11 may be voltage dividing resistors, the second inductor L2 and the sixth capacitor C6 function as filtering resistors, the twelfth resistor R12 is a pull-up resistor, the thirteenth resistor R13 is a current limiting resistor, the seventh capacitor C7 functions as filtering resistors, and the second diode D2 may be a voltage regulator.
In a specific implementation, when the voltage of the battery decreases to 9V, the hysteresis comparison circuit outputs a first voltage signal indicating that the voltage state of the battery is lower than a preset voltage value, and when the filtered voltage increases to 10V, the hysteresis comparison module 10 outputs a first voltage signal indicating that the voltage state of the battery is higher than the preset voltage value.
Further, in this embodiment, the battery voltage state detection circuit further includes a filter circuit 103;
the filter circuit 103 is connected to the storage battery and the reference source circuit 101, respectively, and the filter circuit 103 filters a battery voltage provided by the storage battery and outputs the filtered voltage to the reference source circuit 101;
it can be understood that, since there may be a large ripple on the output of the battery, in order to reduce the influence on the circuit, the present embodiment may filter the battery voltage provided by the battery through the filter circuit 103, obtain a filtered voltage, so as to reduce the ripple influence, and transmit the filtered voltage to the reference source circuit 101.
Referring to fig. 8, fig. 8 is a schematic circuit structure diagram of the filter circuit of the present invention. As shown in fig. 8, the filter circuit 103 includes: an eighth capacitor C8, a third diode D3, a fourth diode D4, a ninth capacitor C9, a third inductor L3, a fourth inductor L4, a tenth capacitor C10, a fifth inductor L5, a second MOS transistor Q3, a fifth diode D5, a first resistor R1, a fourteenth resistor R14, an eleventh capacitor C11, and a twelfth capacitor C12;
an anode of the eighth capacitor C8 is connected to an anode of the battery, an anode of the third diode D3, an anode of the ninth capacitor C9, and a first end of the third inductor L3, a cathode of the third diode D3 is connected to a cathode of the fourth diode D4, a cathode of the eighth capacitor C8 is connected to a cathode of the battery, an anode of the fourth diode D4, a cathode of the eighth capacitor C8, and a first end of the fifth inductor L5, a second end of the third inductor L3 is connected to a second end of the fourth inductor L4 and an anode of the tenth capacitor C10, a second end of the fourth inductor L4 is connected to a drain of the third MOS transistor Q2, a source of the third MOS transistor Q2 is connected to a cathode of the fifth diode D5, a first end of the fifteenth resistor R15, a cathode of the eleventh capacitor C11, an anode of the twelfth capacitor C12, a source of the fourteenth resistor R101, a source circuit of the fourteenth capacitor C5, a cathode of the fourteenth capacitor R14, a gate of the fourteenth capacitor C5, a cathode of the fourteenth capacitor R14, a cathode of the fourteenth capacitor C5, and a cathode of the fourteenth capacitor R5, a cathode of the fourteenth capacitor R14, and a cathode of the fourteenth capacitor R5.
It should be understood that KL30_ P in fig. 8 represents the filtered voltage, in the circuit structure of the filter circuit 103 proposed in this embodiment, the eighth capacitor C8 may be a small capacitor to filter out high-frequency interference, the third diode D3 may be a schottky diode to prevent reverse connection, and the fourth diode D4 may be a transient suppression diode to filter out, remove static electricity, and other interference; the ninth capacitor C9, the third inductor L3, the tenth capacitor C10 and the fifth inductor L5 may adopt pi-type filtering, the second MOS transistor Q3 may be a PMOS transistor to play a role in preventing reverse connection and freewheeling, the fourteenth resistor R14 and the fifteenth resistor R15 are used for voltage division to make VGS of the second MOS transistor Q3 as large as possible, thereby reducing on-resistance of the second MOS transistor Q3, the fifth diode D5 may be a 15V zener diode to make VGS of the second MOS transistor Q3 smaller than 15V, and the eleventh capacitor C11 and the twelfth capacitor C12 mainly serve to stabilize and filter voltages. When the voltage of the storage battery is 12V, the actually measured output ripple after passing through the filter circuit 103 is only 25mV.
The reference source circuit 101 outputs a reference voltage to the comparison circuit 102 according to the filtered voltage.
Further, in the present embodiment, the battery management circuit further includes a current converter 40, and the current converter 40 is connected to the control unit 30;
when the control unit 30 receives the power signal and the first voltage signal indicating that the voltage state of the storage battery is lower than the preset voltage value, the control unit 30 outputs a charging control signal to the current converter 40, and when the current converter 40 receives the charging control signal, the current converter 40 charges the storage battery.
In the present embodiment, the battery voltage state detection circuit includes a reference source circuit and a comparison circuit; the reference source circuit is connected with the storage battery and the comparison circuit respectively, and outputs reference voltage to the comparison circuit according to battery voltage provided by the storage battery; the comparison circuit is respectively connected with the power management circuit and the control unit, and outputs a first voltage signal representing the voltage state of the storage battery to the power management circuit and the control unit according to the battery voltage and the reference voltage. In the embodiment, the reference source circuit generates the reference voltage, so that the comparison circuit compares the battery voltage provided by the storage battery with the reference voltage, and can output the first voltage signal representing the voltage state of the storage battery, thereby accurately judging whether the storage battery at the current moment is in a power shortage state.
In order to achieve the above object, the utility model also provides an intelligent charging device, intelligent charging device includes as above battery management circuit. The specific structure of the battery management circuit refers to the above embodiments, and since the intelligent charging device adopts all the technical solutions of all the above embodiments, at least all the beneficial effects brought by the technical solutions of the above embodiments are achieved, and no further description is given here.
The above only is the preferred embodiment of the present invention, not so limiting the patent scope of the present invention, all under the inventive concept of the present invention, the equivalent structure transformation made by the contents of the specification and the drawings is utilized, or the direct/indirect application in other related technical fields is included in the patent protection scope of the present invention.
Claims (10)
1. A battery management circuit, comprising at least: the device comprises a battery voltage state detection circuit, a power management circuit and a control unit;
the battery voltage state detection circuit is respectively connected with the storage battery, the power management circuit and the control unit, and outputs a first voltage signal representing the voltage state of the storage battery to the power management circuit and the control unit;
the power supply management circuit is connected with the control unit, and provides a power supply signal for the control unit when receiving a first voltage signal which represents that the voltage state of the storage battery is lower than a preset voltage value;
when the control unit receives the power supply signal and receives the first voltage signal which represents that the voltage state of the storage battery is lower than a preset voltage value, the control unit controls the storage battery to be charged.
2. The battery management circuit of claim 1, wherein the power management circuit comprises a wake-up circuit and a power system control circuit;
the wake-up circuit is respectively connected with the battery voltage state detection circuit and the power system control circuit;
the wake-up circuit receives a first voltage signal which is output by the battery voltage state detection circuit and represents the voltage state of the storage battery, and when the wake-up circuit receives the first voltage signal which represents that the voltage state of the storage battery is lower than a preset voltage value, the wake-up circuit outputs a second voltage signal which is used for waking up the power management circuit to the power system control circuit;
and the power supply system control circuit is connected with the control unit and provides a power supply signal for the control unit when receiving the second voltage signal.
3. The battery management circuit of claim 2, wherein the power system control circuit comprises a power system base chip, a first diode, a first capacitor, a first inductor, and a second capacitor;
the positive pole of the first diode is connected with the storage battery, the negative pole of the first diode is respectively connected with the first end of the first inductor and the positive pole of the first capacitor, the negative pole of the first capacitor is grounded, the second end of the first inductor is respectively connected with one input end of the power system basic chip and the positive pole of the second capacitor, the negative pole of the second capacitor is grounded, the wake-up circuit is connected with the other input end of the power system basic chip, and the output end of the power system basic chip is connected with the control unit.
4. The battery management circuit of claim 2, wherein the wake-up circuit comprises: the circuit comprises a first resistor, a second resistor, a triode, a first MOS (metal oxide semiconductor) tube and a third resistor;
the first end of first resistance respectively with the battery with the drain electrode of first MOS pipe is connected, the second end of first resistance respectively with the first end of second resistance with the source electrode of first MOS pipe is connected, the second end of second resistance with the collecting electrode of triode is connected, the base of triode with battery voltage state detection circuitry connects, the projecting pole ground connection of triode, the source electrode of first MOS pipe respectively with electrical power generating system control circuit with the first end of third resistance is connected, the second end ground connection of third resistance.
5. The battery management circuit of claim 1, wherein the control unit comprises a controller chip;
the controller chip is respectively connected with the battery voltage state detection circuit, the power management circuit and the storage battery.
6. The battery management circuit according to any one of claims 1 to 5, further comprising a current converter connected to the control unit;
when the control unit receives the power supply signal and the first voltage signal which represents that the voltage state of the storage battery is lower than a preset voltage value, the control unit outputs a charging control signal to the current converter, and when the current converter receives the charging control signal, the current converter charges the storage battery.
7. The battery management circuit according to claim 1, wherein the cell voltage state detection circuit includes a reference source circuit and a comparison circuit;
the reference source circuit is respectively connected with the storage battery and the comparison circuit, and outputs reference voltage to the comparison circuit according to the battery voltage provided by the storage battery;
the comparison circuit is respectively connected with the power management circuit and the control unit, and outputs a first voltage signal representing the voltage state of the storage battery to the power management circuit and the control unit according to the battery voltage and the reference voltage.
8. The battery management circuit of claim 7, wherein the comparison circuit is a hysteresis comparison circuit.
9. The battery management circuit of claim 7, wherein the cell voltage state detection circuit further comprises a filter circuit;
the filter circuit is connected with the storage battery and the reference source circuit respectively, and is used for filtering the battery voltage provided by the storage battery and outputting the filtered voltage to the reference source circuit;
and the reference source circuit outputs reference voltage to the comparison circuit according to the filtered voltage.
10. An intelligent charging apparatus, characterized in that it comprises a battery management circuit according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222535336.0U CN218549548U (en) | 2022-09-23 | 2022-09-23 | Storage battery management circuit and intelligent charging device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222535336.0U CN218549548U (en) | 2022-09-23 | 2022-09-23 | Storage battery management circuit and intelligent charging device |
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| Publication Number | Publication Date |
|---|---|
| CN218549548U true CN218549548U (en) | 2023-02-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222535336.0U Active CN218549548U (en) | 2022-09-23 | 2022-09-23 | Storage battery management circuit and intelligent charging device |
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| Country | Link |
|---|---|
| CN (1) | CN218549548U (en) |
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2022
- 2022-09-23 CN CN202222535336.0U patent/CN218549548U/en active Active
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