CN217692735U - Portable charge-discharge instrument based on battery management system - Google Patents
Portable charge-discharge instrument based on battery management system Download PDFInfo
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- CN217692735U CN217692735U CN202221341126.1U CN202221341126U CN217692735U CN 217692735 U CN217692735 U CN 217692735U CN 202221341126 U CN202221341126 U CN 202221341126U CN 217692735 U CN217692735 U CN 217692735U
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- battery management
- management system
- discharge
- charging
- discharging
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- 238000007599 discharging Methods 0.000 claims abstract description 37
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 claims abstract description 31
- 229910052744 lithium Inorganic materials 0.000 claims abstract description 31
- 238000013461 design Methods 0.000 abstract description 4
- 238000011161 development Methods 0.000 abstract description 4
- 239000000178 monomer Substances 0.000 description 5
- 238000004891 communication Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 2
- 101150008604 CAN1 gene Proteins 0.000 description 1
- 101150063504 CAN2 gene Proteins 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000009434 installation Methods 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
- 230000002035 prolonged effect 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
Abstract
The utility model relates to a lithium battery management system technical field especially indicates a portable charge-discharge appearance based on battery management system, and it includes AC/DC charger, battery management system BMS mainboard, charge-discharge change over switch, discharge cut-off voltage setting switch, direct current contactor, discharge power resistance, lithium cell group and battery management unit BMU; and the discharge power resistor is connected with the lithium battery pack through the direct current contactor. The utility model has the advantages of ingenious and novel design, can acquire the charging state and parameters in real time, and control the operation of the AC/DC charger, thereby ensuring the charging safety; the development cost is reduced; the charging and discharging can be effectively controlled, and the use is safer; the discharge power resistor is simple and reliable to control.
Description
Technical Field
The utility model belongs to the technical field of lithium battery management system technique and specifically relates to indicate a portable charge-discharge appearance based on battery management system.
Background
In the household energy storage industry, lithium batteries are widely applied due to the advantages of high energy density, long service life, wide working temperature and the like. When the lithium battery is applied to a system, usually, a plurality of battery cores are connected in series to form a battery module, and a plurality of battery modules are connected in series to form the architecture of the system, so that a high-voltage lithium battery system is formed. In the use, the condition that certain monomer electricity core or certain battery module capacity in the system is less than normal can appear, can change whole battery module during the maintenance usually. However, to ensure that the capacity of the newly replaced battery module is consistent with the capacity of other battery modules in the original system, the capacity of the battery modules needs to be balanced in a charging/discharging manner. This maximizes the available capacity of the system. Therefore, it is necessary to develop a device suitable for balancing the capacity of each battery module in the high-voltage lithium battery system.
SUMMERY OF THE UTILITY MODEL
The utility model provides a portable charging and discharging instrument based on a battery management system aiming at the problems of the prior art, which has ingenious and novel design, can acquire the charging state and parameters in real time and control the operation of an AC/DC charger, thereby ensuring the charging safety; the development cost is reduced; the charging and discharging can be effectively controlled, and the use is safer; the discharge power resistor is simple and reliable to control.
In order to solve the technical problem, the utility model discloses a following technical scheme:
the utility model provides a portable charging and discharging instrument based on a battery management system, which comprises an AC/DC charger, a BMS mainboard of the battery management system, a charging and discharging change-over switch, a discharging cut-off voltage setting switch, a direct current contactor, a discharging power resistor, a lithium battery pack and a BMU; the discharge power resistor is connected with the lithium battery pack through the direct current contactor;
the AC/DC charger, the charging and discharging switch, the discharging cut-off voltage setting switch, the direct current contactor and the battery management unit BMU are respectively connected with the BMS mainboard of the battery management system;
and the AC/DC charger is respectively connected with the BMS mainboard of the battery management system and the lithium battery pack.
The portable charging and discharging instrument further comprises a status indicator lamp, and the status indicator lamp is connected with the BMS mainboard of the battery management system.
The portable charging and discharging instrument further comprises a buzzer, and the buzzer is connected with the BMS main board of the battery management system.
Wherein, the AC/DC charger is also connected with an LCD display screen.
The portable charging and discharging instrument further comprises a fan, and the fan is connected with the BMS mainboard of the battery management system.
The utility model has the advantages that:
the utility model has the advantages that the design is ingenious and novel, the BMS mainboard of the battery management system is communicated with the AC/DC charger, the charging state and parameters can be acquired in real time, and the operation of the AC/DC charger is controlled, thereby ensuring the charging safety; based on the BMS mainboard of the original battery management system, secondary development is carried out on the basis, new hardware does not need to be manufactured again, and the development cost is reduced; the BMS mainboard of the battery management system can acquire the monomer voltage and temperature of the lithium battery pack through the BMU, so that charging and discharging can be effectively controlled, and the use is safer; the utility model discloses choose for use discharge power resistance as the load that discharges, can be used to make the temperature rise to the allowable temperature range that charges for lithium cell group is the heating under the low temperature environment, promoted product application scope, in addition, discharge power resistance control is simple, reliable.
Drawings
Fig. 1 is a schematic diagram of embodiment 1.
The reference numerals in fig. 1 include:
1. an AC/DC charger; 2. a battery management system BMS mainboard; 3. a charge-discharge changeover switch; 4. a discharge cutoff voltage setting switch; 5. a DC contactor; 6. a discharge power resistor; 7. a lithium battery pack; 8. a battery management unit BMU; 9. a status indicator light; 10. a buzzer; 11. an LCD display screen; 12. a fan.
Detailed Description
In order to facilitate understanding of those skilled in the art, the present invention will be further described with reference to the following examples and drawings, which are not intended to limit the present invention. The present invention will be described in detail with reference to the accompanying drawings.
The embodiment provides a portable charging and discharging instrument based on a battery management system, as shown in fig. 1, comprising an AC/DC charger 1, a battery management system BMS board 2, a charging and discharging switch 3, a discharging cut-off voltage setting switch 4, a direct current contactor 5, a discharging power resistor 6, a lithium battery pack 7 and a battery management unit BMU8; the discharge power resistor 6 is connected with the lithium battery pack 7 through the direct current contactor 5;
the AC/DC charger 1, the charging and discharging switch 3, the discharging cut-off voltage setting switch 4, the direct current contactor 5 and the battery management unit BMU8 are respectively connected with the BMS mainboard 2 of the battery management system;
the AC/DC charger 1 is connected to the battery management system BMS board 2 and the lithium battery pack 7, respectively.
Specifically, the utility model is ingenious and novel in design, the AC/DC charger 1 is used for providing charging power for the lithium battery pack 7; the battery management system BMS mainboard 2 is used for realizing capacity balance control of the lithium battery pack 7 and acquiring monomer voltage and temperature information of each battery cell in the lithium battery pack 7 through communication with the battery management unit BMU8; according to the charging and discharging state set by a maintainer, determining whether to control the AC/DC charger 1 to charge and control the DC contactor 5 to discharge, and according to the position of a discharge cut-off voltage setting switch 4, determining the discharge end voltage of the lithium battery pack 7; the direct current contactor 5 and the discharge power resistor 6 are connected to the lithium battery pack 7 and used for discharging the lithium battery pack 7; lithium cell group 7 is for needing to carry out charge-discharge balance's lithium cell module, and its inside has installation battery management unit BMU8, and BMU is used for gathering the monomer voltage and the temperature of electric core to with data upload to the battery management system BMS mainboard 2 of last one-level, can realize the passive balanced function of electric core simultaneously.
Battery management system BMS mainboard 2 is used for realizing the balance of charging and the balance function of discharging, to the function of charging, battery management system BMS mainboard 2 is through CAN1 and the battery management unit BMU8 communication of lithium cell group 7, acquire the monomer voltage and the temperature of electric core, according to the charging logic that predetermines, obtain suitable charging voltage, charging current, and issue for the charger through CAN2, the charger takes the charging voltage that battery management system BMS mainboard 2 set up, after charging current and the start instruction, charge lithium cell group 7 immediately, this in-process, battery management system BMS mainboard 2 CAN adjust charging voltage and electric current in real time, the charger also charges according to new setting parameter and finishes until charging.
Wherein, to the function of discharging, battery management system BMS mainboard 2 detects the position of discharge cutoff voltage setting switch 4 earlier, and discharge cutoff voltage setting switch 4 can be the band switch of many gears, can set up a plurality of voltage points, for example: 3.4V, 3.35V, 3.3V, 3.2V, 3.15V, 3.1V, 3.0V, etc., and the battery management system BMS board 2 takes the voltage point as a discharge end cell voltage value of the battery module. Once the charge-discharge switch 3 is pressed, the battery management system BMS board 2 outputs a dry contact to control the dc contactor 5 to close, and starts to discharge until the lowest cell voltage reaches the set cut-off voltage.
In this embodiment, the AC/DC charger 1 is further connected to an LCD display 11. Specifically, the LCD 11 is a sub-module of the AC/DC charger 1, and is used to display charging parameters and charging status, and has a CAN communication function and provides 12V power to the BMS board 2 of the battery management system BMS.
In this embodiment, the portable charge and discharge instrument further includes a status indicator lamp 9, the status indicator lamp 9 is connected to the BMS board 2 of the battery management system, the portable charge and discharge instrument further includes a buzzer 10, and the buzzer 10 is connected to the BMS board 2 of the battery management system; the portable charging and discharging instrument further comprises a fan 12, and the fan 12 is connected with the BMS mainboard 2. Particularly, under the arrangement, the portable charging and discharging instrument is convenient to radiate heat, so that the use safety is improved, and the service life is prolonged; when the discharge power resistor 6 works, a large amount of heat is generated, and at this time, the battery management system BMS mainboard 2 controls the fan 12 to be turned on so as to reduce the temperature of the power resistor; further, the discharge end voltage of the lithium battery pack 7 is determined according to the position of the discharge cut-off voltage setting switch 4, meanwhile, the fan 12 is controlled to radiate heat of the discharge power resistor 6, the fan 12 is used for radiating heat of the discharge power resistor 6, the temperature of the power resistor is reduced, and meanwhile, the local environment temperature can also be increased; it also has a status indicator light 9 and a buzzer 10, which are used for indicating the working status of the charging and discharging instrument, and the buzzer 10 rings to remind when the charging and discharging are finished.
The above description is only for the preferred embodiment of the present invention, and the present invention is not limited to the above description, and although the present invention is disclosed in the preferred embodiment, it is not limited to the above description, and any person skilled in the art can make some changes or modifications to equivalent embodiments without departing from the scope of the present invention, but all the technical solutions of the present invention are within the scope of the present invention.
Claims (5)
1. The utility model provides a portable charge-discharge appearance based on battery management system which characterized in that: the system comprises an AC/DC charger, a battery management system BMS mainboard, a charge-discharge changeover switch, a discharge cut-off voltage setting switch, a direct current contactor, a discharge power resistor, a lithium battery pack and a battery management unit BMU; the discharge power resistor is connected with the lithium battery pack through the direct current contactor;
the AC/DC charger, the charging and discharging switch, the discharging cut-off voltage setting switch, the direct current contactor and the battery management unit BMU are respectively connected with the BMS mainboard of the battery management system;
and the AC/DC charger is respectively connected with the BMS mainboard of the battery management system and the lithium battery pack.
2. The portable charging and discharging instrument based on the battery management system according to claim 1, wherein: the portable charging and discharging instrument further comprises a status indicator lamp, and the status indicator lamp is connected with the BMS mainboard of the battery management system.
3. The portable charging and discharging instrument based on the battery management system according to claim 1, wherein: the portable charging and discharging instrument further comprises a buzzer, and the buzzer is connected with the BMS main board of the battery management system.
4. The portable charging and discharging instrument based on the battery management system according to claim 1, wherein: the AC/DC charger is also connected with an LCD display screen.
5. The portable charging and discharging instrument based on the battery management system according to claim 1, wherein: the portable charging and discharging instrument further comprises a fan, and the fan is connected with the BMS mainboard of the battery management system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221341126.1U CN217692735U (en) | 2022-05-30 | 2022-05-30 | Portable charge-discharge instrument based on battery management system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221341126.1U CN217692735U (en) | 2022-05-30 | 2022-05-30 | Portable charge-discharge instrument based on battery management system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217692735U true CN217692735U (en) | 2022-10-28 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221341126.1U Active CN217692735U (en) | 2022-05-30 | 2022-05-30 | Portable charge-discharge instrument based on battery management system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217692735U (en) |
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2022
- 2022-05-30 CN CN202221341126.1U patent/CN217692735U/en active Active
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| TR01 | Transfer of patent right |
Effective date of registration: 20231016 Address after: Delaware Patentee after: Saivante Systems Address before: 523000 building C7, we Valley, Everbright, No.16, Keji 4th Road, Songshanhu high tech Industrial Development Zone, Dongguan City, Guangdong Province Patentee before: Dongguan Fenggu Technology Co.,Ltd. |