CN217182977U - Battery management system with reduced voltage discharge mechanism - Google Patents
Battery management system with reduced voltage discharge mechanism Download PDFInfo
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- CN217182977U CN217182977U CN202122749070.5U CN202122749070U CN217182977U CN 217182977 U CN217182977 U CN 217182977U CN 202122749070 U CN202122749070 U CN 202122749070U CN 217182977 U CN217182977 U CN 217182977U
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- 230000007246 mechanism Effects 0.000 title claims abstract description 20
- 238000007599 discharging Methods 0.000 claims abstract description 31
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 23
- 230000003068 static effect Effects 0.000 claims abstract description 11
- 238000012544 monitoring process Methods 0.000 claims abstract description 9
- 230000009467 reduction Effects 0.000 abstract description 6
- 238000004146 energy storage Methods 0.000 abstract description 2
- 230000007774 longterm Effects 0.000 abstract description 2
- 230000001737 promoting effect Effects 0.000 abstract description 2
- 230000008878 coupling Effects 0.000 description 9
- 238000010168 coupling process Methods 0.000 description 9
- 238000005859 coupling reaction Methods 0.000 description 9
- 238000000034 method Methods 0.000 description 9
- 238000010586 diagram Methods 0.000 description 3
- 230000007423 decrease Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 125000004122 cyclic group Chemical group 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000008961 swelling Effects 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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- Charge And Discharge Circuits For Batteries Or The Like (AREA)
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Abstract
The utility model provides a battery management system with voltage reduction and discharge mechanism, including a step-down transformer, a discharge return circuit and a microprocessor: the voltage reducer is coupled with a battery; the discharging loop is coupled with the voltage reducer; the microprocessor is coupled with the battery, the voltage reducer and the discharge loop, and the microprocessor comprises: a battery state monitoring unit, a timing unit and a control unit; if the battery is in a static state, the timing unit times, and if the timing time is longer than or equal to a time threshold, the control unit enables an output voltage of the battery to be subjected to voltage reduction and enables the discharging loop to discharge. The utility model discloses when promoting the security and the life-span retentivity of the long-term energy storage of battery, improve the security that the battery discharged.
Description
Technical Field
The present invention relates to a battery management system, and more particularly, to a battery management system with a voltage drop discharge mechanism.
Background
In the existing devices using batteries or battery packs capable of being charged and discharged circularly, when the battery assembly is in a full-charge state and is not used for a long time, the chemical activity of the battery assembly in the full-charge state is high, so that the damage probability of battery swelling and/or liquid leakage is improved, and the service life of the battery is shortened.
SUMMERY OF THE UTILITY MODEL
In order to solve the problem existing in the background art, the utility model provides a battery management system with voltage reduction discharge mechanism, it includes a step-down transformer, a discharge return circuit and a microprocessor: the voltage reducer is coupled with a battery; the discharging loop is coupled with the voltage reducer; the microprocessor is coupled with the battery, the voltage reducer and the discharge loop, and the microprocessor comprises: a battery state monitoring unit, a timing unit and a control unit; if the state is a static state, the timing unit starts timing, and when the timing time of the timing unit is greater than or equal to a time threshold, the control unit enables an output voltage of the battery to be subjected to voltage reduction and discharge through the discharge loop.
The utility model relates to an embodiment, microprocessor still includes an electric quantity judgement unit during quiescent condition, electric quantity judgement unit judges an electric quantity of battery, if the electric quantity is less than an electric quantity threshold value, the control unit forbids the battery output voltage falls the voltage, just the control unit forbids discharge circuit discharges.
Generally, the quiescent state means that the battery is neither in a charged state nor in a discharged state.
The utility model discloses an in the embodiment, still include a first switch, and wherein, microprocessor still includes an electric quantity judgement unit, first switch coupling in the battery with between the step-down transformer, the control unit passes through first switch coupling the step-down transformer, if timing time is longer than or equal to the time threshold, the control unit makes first switch switches on, makes the battery output voltage carries out the step-down voltage, and is up to electric quantity judgement unit judges an electric quantity of battery is less than an electric quantity threshold, the control unit makes first switch disconnection.
In an embodiment of the present invention, the first switch is a switch loop including a PMOS transistor and an NMOS transistor.
The utility model discloses an in the embodiment, still include a second switch, and wherein, microprocessor still includes an electric quantity judgement unit, the second switch coupling be in the step-down transformer with between the return circuit discharges, the control unit passes through the second switch coupling the return circuit discharges, if timing time is longer than or equal to the time threshold value, the control unit switches on the second switch makes the return circuit that discharges, until the electric quantity judgement unit judges an electric quantity of battery is less than an electric quantity threshold value, the control unit makes the second switch disconnection.
In an embodiment of the present invention, the second switch is a switch loop including a PMOS transistor and an NMOS transistor.
In an embodiment of the present invention, the battery is used for an unmanned aerial vehicle.
The utility model relates to an embodiment, microprocessor still includes an electric quantity judgement unit, the return circuit that discharges is up to the electric quantity judgement unit is judged an electric quantity of battery is less than an electric quantity threshold value, the control unit stops the battery output voltage's step-down voltage reaches the discharge of return circuit that discharges.
Drawings
Fig. 1 is a block diagram of a battery management system with a step-down discharge mechanism according to an embodiment of the present invention.
Fig. 2 is a block diagram of another embodiment of a battery management system with a step-down discharge mechanism according to the present invention.
Fig. 3 is a flowchart illustrating an embodiment of a method for performing the battery management system with a step-down discharging mechanism according to the present invention.
Fig. 4 is a flowchart illustrating another embodiment of a method for implementing a battery management system with a step-down discharge mechanism according to the present invention.
Description of reference numerals: 1-battery management system with a reduced voltage discharge mechanism; 10-a step-down transformer; 11-a discharge loop; 12-a microprocessor; 120-battery status monitoring unit; 121-a timing unit; 122-a control unit; 123-electric quantity judging unit; 13-a first switch; 14-a second switch; 2-a battery; S31-S40-step.
Detailed Description
Please refer to fig. 1, which is a block diagram of a battery management system 1 with a voltage drop discharge mechanism according to the present invention. As shown in the drawings, the battery management system 1 with the voltage-reducing discharge mechanism of the present invention mainly includes a voltage reducer 10, a discharge loop 11 and a microprocessor 12.
Step-down transformer 10 couple a battery 2, discharge circuit 11 couple step-down transformer 10. And the microprocessor 12 is coupled to the battery 2, the voltage reducer 10 and the discharge circuit 11. It should be noted that the coupling herein is a direct coupling or an indirect coupling, i.e., the coupling can be via other components, modules, units, devices, etc. The microprocessor 12 includes a battery status monitoring unit 120, a timing unit 121 and a control unit 122. The battery state monitoring unit 120 monitors at least one state of the battery 2.
Specifically, if the state is a static state, the timing unit 121 counts to obtain a timing time (for example, the timing unit 121 continuously counts to extract a time segment from the timing time), and if the timing time is longer than or equal to a time threshold, the control unit 122 decreases an output voltage of the battery 2 and discharges the discharge loop 11. In an embodiment, the time threshold is a predetermined value, for example, seven days, and further, seven days after the end of the charging state, but the invention is not limited thereto. In another embodiment, the control unit 122 turns on a switch included in the voltage reducer 10 or a switch coupled before the voltage reducer 10, and turns on a switch included in the discharge circuit 11 or a switch coupled before the discharge circuit 11, so as to decrease to a predetermined voltage value (for example, from 20V output voltage of the battery to 12V), or for example, from 20V output voltage of the battery to less than 12V.
Further, the microprocessor 12 further includes an electric quantity determining unit 123, the discharging circuit 11 discharges until the electric quantity determining unit 123 determines that an electric quantity of the battery 2 is lower than an electric quantity threshold, and the control unit 122 stops the voltage drop of the output voltage of the battery 2 and the discharging of the discharging circuit 11. For example, the charge threshold is 30% of the full charge capacity of the Battery 2, but the charge threshold varies according to the storage characteristics of the Battery 2, and the microprocessor 12 is a microprocessor in a Battery Management System (BMS). While the discharge loop 11 is a resistor-based circuit, the timing unit 121 includes an oscillator. The battery 2 may further include chips and/or circuit components to constitute a battery module, and in one example, a plurality of rechargeable batteries or a plurality of rechargeable batteries and chips and/or circuit components may be substituted for the battery 2 to form a battery pack.
For example, the electric quantity determination unit 123 can measure the voltage and/or the current of the battery 2 to obtain the electric quantity of the battery 2, or the electric quantity determination unit 123 can obtain the voltage and/or the current of the battery 2 to obtain the electric quantity of the battery 2. In addition, the voltage reducer 10 may include a switch unit, so that when the timing time is longer than or equal to a time threshold, the control unit 122 turns on the switch to reduce the output voltage of the battery 2, and until the electric quantity judgment unit 123 judges that the electric quantity of the battery 2 is lower than the electric quantity threshold, the control unit 122 turns off the switch. For example, if the step-down transformer 10 is a step-down transformer having an NC ON/OFF terminal, the NC ON/OFF terminal serves as a terminal of the switching unit. The discharging circuit 11 may also include a switch element or a switch circuit, so that when the timing time is longer than or equal to a time threshold, the control unit 122 turns on the switch element or the switch circuit to discharge the discharging circuit 11, and until the electric quantity determining unit 123 determines that the electric quantity of the battery 2 is lower than the electric quantity threshold, the control unit 122 turns off the switch element or the switch circuit.
In one possible embodiment, the battery state monitoring unit 120 may obtain the state of the battery 2, such as a static state, a charging state and a discharging state, from the voltage of the battery 2. In a static state (generally, after the charging state is finished), the electric quantity determining unit 123 determines the electric quantity of the battery 2, and if the electric quantity is lower than the electric quantity threshold, the control unit 122 prohibits the output voltage of the battery 2 from decreasing, and the control unit 122 prohibits the discharging circuit 11 from discharging.
In another embodiment, as shown in fig. 2, the battery management system 1 with a step-down discharging mechanism of the present invention further includes a first switch 13 coupled between the battery 2 and the step-down transformer 10, the control unit 122 is coupled to the step-down transformer 10 through the first switch 13, if the timing time is longer than or equal to a time threshold, the control unit 122 turns on the first switch 13, so that the output voltage of the battery 2 is stepped down. Further, the microprocessor 12 further includes an electric quantity determining unit 123, so that the control unit 122 turns off the first switch 13 until the electric quantity determining unit 123 determines that the electric quantity of the battery 2 is lower than the electric quantity threshold. In one possible embodiment, the first switch 13 is a switch loop including a PMOS transistor and an NMOS transistor.
In addition, the battery management system 1 with the voltage-drop discharging mechanism of the present invention further includes a second switch 14, which is coupled between the voltage reducer 10 and the discharging loop 11, the control unit 122 is coupled to the discharging loop 11 through the second switch 14, if the timing time is longer than or equal to a time threshold, the control unit 122 makes the second switch 14 conduct, so that the discharging loop 11 discharges. Further, the microprocessor 12 further includes an electric quantity determining unit 123, so that the control unit 122 turns off the second switch 13 until the electric quantity determining unit 123 determines that the electric quantity of the battery 2 is lower than the electric quantity threshold. In one possible embodiment, the second switch 14 is a switch loop including a PMOS transistor and an NMOS transistor.
In a non-limiting embodiment, the battery 2 is used in an Unmanned Aerial Vehicle (UAV), but can also be used in devices, apparatuses, systems, etc. that use other batteries for cyclic charging.
The method for implementing the battery management system with a reduced voltage discharge mechanism of the present invention, as shown in fig. 3, includes steps S31, S33, S35, S37, S39 and S40.
In one embodiment, in step S31, a microprocessor at least monitors a state of a battery. For example, the microprocessor obtains the voltage, current and other information of the battery by a battery state monitoring unit to obtain which of the charging state, the discharging state and the static state the battery is in. In detail, the static state means that the battery is neither in a charging state nor in a discharging state.
Then, in step S33, if the battery is in a static state, the microprocessor counts time. For example, the microprocessor is clocked by a timing unit to obtain a timing time when the battery is in a static state. If the battery is in the non-stationary state, the process continues to step S31.
In step S35, the microprocessor determines whether the counted time is longer than or equal to a time threshold, and if so, proceeds to step S37, where the microprocessor drops an output voltage of the battery for discharging. For example, if it is determined that the timing time is longer than or equal to a time threshold, the microprocessor causes a voltage reducer to reduce the output voltage of the battery by a control unit, and causes a discharge loop to discharge by the control unit. If not, the process returns to step S33.
In one possible embodiment, the method further includes step S39. In step S39, the microprocessor determines whether an electric quantity of the battery is lower than an electric quantity threshold, and if so, performs step S40 to stop discharging the battery. For example, the microprocessor obtains the voltage and/or current data of the battery by using an electric quantity judging unit, and selectively uses a lookup table to obtain the electric quantity of the battery. When the electric quantity is lower than an electric quantity threshold value, the microprocessor enables the voltage reducer to stop reducing the voltage through the control unit, and enables the discharging loop to stop discharging through the control unit. If not, the voltage reducer and the discharge loop are not further operated to continue discharging.
In a possible embodiment, as shown in fig. 4, the method for performing the battery management system with the step-down discharging mechanism further includes performing step S32 after step S31, wherein after the battery is in the static state, the method further includes determining whether a charge of the battery is lower than a charge threshold, if so, prohibiting the step-down and discharging of the battery, and returning to step S31. For example, when the microprocessor judges that the electric quantity of the battery is lower than the electric quantity threshold value by the electric quantity judging unit, the control unit turns off the voltage reducer and the switch of the discharging loop.
In a possible embodiment, the microprocessor controls whether the voltage reduction of the output voltage of the battery is performed or not through a first switch, and the microprocessor controls whether the discharge of the battery is performed or not through a second switch.
Other details of the method for performing the battery management system with the voltage-drop discharge mechanism of the present invention have been disclosed above, and are therefore not repeated herein.
Through the foretell battery management system who has the voltage reduction mechanism of discharging, through coupling the step-down transformer before the return circuit that discharges, the utility model discloses can reduce battery or battery group to the output voltage who discharges the return circuit to when promoting the security and the life-span maintenance nature of the long-term energy storage of battery, improve the security that the battery discharged. Further, the utility model discloses can avoid overdischarge under the battery condition of charging inadequately selectively to avoid the battery to damage.
The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention, i.e., all equivalent changes and modifications in the shape, structure, characteristics and spirit of the claims of the present invention are included in the claims of the present invention.
Claims (8)
1. A battery management system having a reduced voltage discharge mechanism, comprising:
a voltage reducer coupled to a battery; and
a discharge loop coupled to the voltage reducer; and
a microprocessor, the circuit portion of the microprocessor comprising:
a battery state monitoring unit coupled to the battery for detecting the voltage of the battery and obtaining a state of the battery;
a timing unit, including an oscillator, coupled to the battery state monitoring unit, for starting timing when the state is a static state; and
and the control unit is coupled with the timing unit, the voltage reducer and the discharging loop, and controls the voltage reducer to discharge through the discharging loop to reduce the output voltage of the battery when the timing time of the timing unit is greater than or equal to a time threshold value.
2. The battery management system of claim 1, wherein the microprocessor further comprises a power determination unit, the power determination unit determines a power of the battery in the quiescent state, if the power is lower than a power threshold, the control unit prohibits the output voltage of the battery from being reduced, and the control unit prohibits the discharge loop from discharging.
3. The battery management system of claim 1, further comprising a first switch, and wherein the microprocessor further comprises a power determination unit, the first switch is coupled between the battery and the voltage reducer, the control unit is coupled to the voltage reducer via the first switch, if the timing time is longer than or equal to the time threshold, the control unit turns on the first switch to reduce the output voltage of the battery until the power determination unit determines that a power of the battery is lower than a power threshold, and the control unit turns off the first switch.
4. The battery management system of claim 3, wherein the first switch is a switch loop comprising a PMOS transistor and an NMOS transistor.
5. The battery management system of claim 1, further comprising a second switch, and wherein the microprocessor further comprises a power determination unit, the second switch is coupled between the voltage reducer and the discharge loop, the control unit is coupled to the discharge loop via the second switch, and if the timing time is longer than or equal to the time threshold, the control unit turns on the second switch to discharge the discharge loop until the power determination unit determines that a power of the battery is lower than a power threshold, the control unit turns off the second switch.
6. The battery management system of claim 5, wherein the second switch is a switch loop comprising a PMOS transistor and an NMOS transistor.
7. The battery management system with a brown-out mechanism of claim 1, wherein the battery is for an unmanned aerial vehicle.
8. The battery management system of claim 1, wherein the microprocessor further comprises a charge determination unit, the discharge circuit discharges until the charge determination unit determines that a charge of the battery is below a charge threshold, and the control unit stops the voltage drop of the output voltage of the battery and the discharge of the discharge circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122749070.5U CN217182977U (en) | 2021-11-10 | 2021-11-10 | Battery management system with reduced voltage discharge mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122749070.5U CN217182977U (en) | 2021-11-10 | 2021-11-10 | Battery management system with reduced voltage discharge mechanism |
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| Publication Number | Publication Date |
|---|---|
| CN217182977U true CN217182977U (en) | 2022-08-12 |
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| CN202122749070.5U Active CN217182977U (en) | 2021-11-10 | 2021-11-10 | Battery management system with reduced voltage discharge mechanism |
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- 2021-11-10 CN CN202122749070.5U patent/CN217182977U/en active Active
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