CN212905958U - Lithium battery Internet of things communication device - Google Patents
Lithium battery Internet of things communication device Download PDFInfo
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- CN212905958U CN212905958U CN202021721686.0U CN202021721686U CN212905958U CN 212905958 U CN212905958 U CN 212905958U CN 202021721686 U CN202021721686 U CN 202021721686U CN 212905958 U CN212905958 U CN 212905958U
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Abstract
The utility model relates to a lithium battery communication technology field discloses a lithium battery thing networking communication device, including control switch, energy storage unit, voltage sampling unit, MCU main control unit, CAN communication unit and GPRS unit, control switch's control end is connected with MCU main control unit electricity, and control switch's input is connected with the lithium cell electricity, and control switch's output is connected with the energy storage unit electricity, and voltage sampling unit is used for detecting the output voltage of energy storage unit, and inputs sampling voltage to MCU main control unit; MCU main control unit passes through CAN communication unit and BMS protection system communication connection, and MCU main control unit passes through the GPRS unit long-range service information of sending the lithium cell that acquires from BMS protection system, the utility model discloses a voltage sampling unit automated inspection energy storage unit's output voltage to the output voltage of energy storage unit is adjusted to the regulation mode through the negative feedback, and then makes the utility model discloses CAN use on the lithium cell package of different specifications, reduce the complexity of power scheme configuration.
Description
Technical Field
The utility model relates to a lithium cell communication technology field, concretely relates to lithium cell thing networking communication device.
Background
The lithium battery is gradually applied to the fields of mobile phones, computers, new energy vehicles and the like due to the advantages of high energy density, small size and the like. However, a single-cell voltage of a lithium battery is low, and a single-cell capacity is limited, and in order to meet different application scenarios, the single-cell batteries are combined in a series-parallel connection manner during production, and finally, battery packs with different voltage and capacity specifications are formed.
At present, in order to manage the whole lithium battery pack, each lithium battery pack is provided with a BMS protection system, and the normal operation of the whole lithium battery pack is ensured through the BMS protection system. From this, the lithium battery package has introduced MCU control function, and the introduction of MCU and power management chip makes BMS protection system can acquire the service information of more lithium batteries, through drawing these information, can monitor the running state of lithium battery package long-rangely.
However, because the power of BMS protection system is mostly taken from the battery, and is mostly for being less than 12V's digital voltage, this makes thing networking communication module can't share same power with BMS protection system, if reform transform the power supply line of BMS protection system, not only the cost is higher, and the model specification of the BMS protection system of different producers production is different moreover, does not have unified standard, and the BMS protection system after reforming transform still hardly matches with the thing networking communication module of different producers. In addition, the voltage range of the lithium battery pack is wide, the voltage input range of the power supply of the existing Internet of things module is usually not more than 100V, and the Internet of things communication module is difficult to directly obtain the power supply from the lithium battery packs with different specifications.
SUMMERY OF THE UTILITY MODEL
In view of the not enough of background art, the utility model provides a lithium cell thing networking communication device, the technical problem that solve is that the thing networking communication module that carries out data interaction with the BMS protection system of lithium cell carries out because can not use the lithium cell package as the power with the same power of BMS protection system sharing or can not directly use at present, and is compatible poor.
For solving the technical problem, the utility model provides a following technical scheme: a lithium battery Internet of things communication device comprises a control switch, an energy storage unit, a voltage sampling unit, an MCU (microprogrammed control unit), a CAN (controller area network) communication unit and a GPRS (general packet radio service) unit, wherein the control end of the control switch is electrically connected with the MCU main control unit, the input end of the control switch is electrically connected with a lithium battery, the output end of the control switch is electrically connected with the energy storage unit, and the voltage sampling unit is used for detecting the output voltage of the energy storage unit and inputting sampling voltage to the MCU main control unit; MCU main control unit passes through CAN communication unit and BMS protection system communication connection, and MCU main control unit passes through the long-range service information that sends the lithium cell that acquires from BMS protection system of GPRS unit.
Furthermore, the MCU main control unit is also electrically connected with a memory, and the internal storage space of the MCU main control unit or the memory stores the power supply voltage information of the lithium battery Internet of things communication module.
The MCU main control unit adjusts the conduction time of the control switch in a negative feedback mode, if the sampling voltage received by the MCU main control unit is larger than the power voltage of the set lithium battery Internet of things communication module, the MCU main control unit reduces the conduction time of the control switch, and if the sampling voltage received by the MCU main control unit is smaller than the power voltage of the set lithium battery Internet of things communication module, the MCU main control unit increases the conduction time of the control switch.
Further, the energy storage unit comprises an inductor L1, a capacitor C1 and a diode D1, one end of the inductor L1 and the negative electrode of the diode D1 are electrically connected with the output end of the control switch, and the other end of the inductor L1 is electrically connected with the positive electrode of the diode D1 through the capacitor C1.
The utility model discloses output voltage to the lithium cell adjusts as follows: the power supply end of the MCU main control unit and the MCU in the BMS protection system share the same power supply, the MCU main control unit drives the switch unit to be conducted initially, the lithium battery charges the energy storage unit, the voltage sampling unit detects the output voltage of the energy storage unit and inputs the sampling voltage to the MCU main control unit, if the sampling voltage is higher than the set power supply voltage of the lithium battery Internet of things communication module, the MCU main control unit reduces the duty ratio of the PWM driving signal input to the control end of the control switch, reduces the conduction time of the control switch, if the sampling voltage is lower than the set power voltage of the lithium battery Internet of things communication module, the MCU main control unit increases the duty ratio of a PWM (pulse-width modulation) driving signal input to the control end of the control switch, and increases the conduction time of the control switch until the sampling voltage input to the MCU main control unit by the voltage sampling unit is the same as the set power voltage of the lithium battery Internet of things communication module.
Compared with the prior art, the utility model beneficial effect who has is: through the output voltage of voltage sampling unit automated inspection energy storage unit and to MCU main control unit input sampling voltage, MCU main control unit carries out the comparison through the mains voltage with sampling voltage and the lithium cell thing networking communication module who sets for, the duty cycle of the PWM drive signal of the control end of dynamic adjustment input control switch, finally realize steady voltage, and then can use on the lithium cell package of different specifications, the flexibility of thing networking module configuration under different scenes has been improved, the complexity of power scheme configuration has been reduced.
Drawings
The utility model discloses there is following figure:
fig. 1 is the utility model discloses lithium cell thing networking communication module's structure chart.
Detailed Description
The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic drawings and illustrate the basic structure of the present invention only in a schematic manner, and thus show only the components related to the present invention.
As shown in fig. 1, a communication device of the internet of things for a lithium battery comprises a control switch, an energy storage unit 1, a voltage sampling unit, an MCU main control unit, a CAN communication unit and a GPRS unit. The control end of the control switch is electrically connected with the MCU main control unit, the input end of the control switch is electrically connected with the lithium battery, the output end of the control switch is electrically connected with the energy storage unit, and the voltage sampling unit is used for detecting the output voltage of the energy storage unit and inputting the sampling voltage to the MCU main control unit; the MCU main control unit receives the use information of the lithium battery sent from the BMS protection system through the CAN communication unit, processes the information, sends the information to the GPRS unit through a serial port, and the GPRS unit sends the information to the server remotely through a TCP/I P protocol, so that the remote monitoring of the lithium battery is realized.
In this embodiment, the control switch includes a plurality of MOS transistors, the drains of all the MOS transistors are connected in parallel, the sources of all the MOS transistors are connected in parallel, and the gates of all the MOS transistors are connected in parallel.
In this embodiment, the MCU main control unit is still connected the memory electrically, and there is lithium cell thing networking communication module's mains voltage size information in MCU main control unit's inside memory space or memory, and the memory also can be used to store the service information of the lithium cell from BMS protection system's the acquirement in addition.
In this embodiment, the MCU main control unit adjusts control switch's on-time through the negative feedback mode, if the sampling voltage that MCU main control unit received is greater than the mains voltage of the lithium cell thing networking communication module of settlement, MCU main control unit reduces control switch's on-time, if the sampling voltage that MCU main control unit received is less than the mains voltage of the lithium cell thing networking communication module of settlement, MCU main control unit increases control switch's on-time.
In this embodiment, the energy storage unit 1 includes an inductor L1, a capacitor C1, and a diode D1, one end of the inductor L1 and a negative electrode of the diode D1 are both electrically connected to the output terminal of the control switch, and the other end of the inductor L1 is electrically connected to a positive electrode of the diode D1 through the capacitor C1. Fluctuations in the voltage output by the energy storage unit 1 can be avoided by the capacitor C1. Through diode D1, when the MOS pipe changes from conducting to closing, the self-inductance potential that produces across inductance L1 can not be along damaging the MOS pipe.
Specifically, the working process of the energy storage unit 1 is as follows: the conduction and the closing of the MOS tube are controlled by a PWM (pulse-width modulation) driving signal output by the MCU main control unit, when the MCU main control unit outputs a high-level PWM driving signal, the MOS tube is conducted, the voltage of the anode of the diode D1 is zero, the lithium battery supplies power to the resistor R1 through the inductor L1 (the resistor R1 is an equivalent load of the whole lithium battery Internet of things communication module), the current flowing through the inductor L1 gradually rises, the inductor converts the electric energy into magnetic energy to be stored, and the self-induction potential generated at the two ends of the inductor L1 in the process prevents the current from rising; when the MCU main control unit outputs a low-level PWM driving signal, the MOS tube is closed, self-induction potential generated at two ends of the inductor L1 prevents current from dropping, the inductor L1, the resistor R1 and the diode D1 form a loop, and magnetic energy stored in the inductor L1 is converted into electric energy to be released to a load.
Specifically, the utility model discloses output voltage to the lithium cell adjusts as follows: the power supply end of the MCU main control unit and the MCU in the BMS protection system share the same power supply, the MCU main control unit drives the switch unit to be conducted initially, the lithium battery charges the energy storage unit, the voltage sampling unit detects the output voltage of the energy storage unit and inputs the sampling voltage to the MCU main control unit, if the sampling voltage is higher than the set power supply voltage of the lithium battery Internet of things communication module, the MCU main control unit reduces the duty ratio of the PWM driving signal input to the control end of the control switch, reduces the conduction time of the control switch, if the sampling voltage is lower than the set power voltage of the lithium battery Internet of things communication module, the MCU main control unit increases the duty ratio of a PWM (pulse-width modulation) driving signal input to the control end of the control switch, and increases the conduction time of the control switch until the sampling voltage input to the MCU main control unit by the voltage sampling unit is the same as the set power voltage of the lithium battery Internet of things communication module.
To sum up, the utility model discloses an output voltage of voltage sampling unit automated inspection energy storage unit 1 and to MCU main control unit input sampling voltage, MCU main control unit carries out the comparison through the mains voltage with sampling voltage and the lithium cell thing networking communication module of setting for, the duty cycle of the PWM drive signal of the control end of dynamic adjustment input control switch, finally realize the steady voltage, and then can use on the lithium cell package of different specifications, the flexibility of thing networking module configuration under different scenes has been improved, the complexity of power scheme configuration has been reduced.
In light of the above, the present invention is not limited to the above embodiments, and various changes and modifications can be made by the worker without departing from the scope of the present invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.
Claims (3)
1. The utility model provides a lithium cell thing networking communication device which characterized in that: the control end of the control switch is electrically connected with the MCU main control unit, the input end of the control switch is electrically connected with the lithium battery, the output end of the control switch is electrically connected with the energy storage unit, and the voltage sampling unit is used for detecting the output voltage of the energy storage unit and inputting the sampling voltage to the MCU main control unit; the MCU main control unit is in communication connection with the BMS protection system through the CAN communication unit, and remotely sends the use information of the lithium battery acquired from the BMS protection system through the GPRS unit.
2. The lithium battery Internet of things communication device of claim 1, characterized in that: the MCU main control unit is also electrically connected with a memory, and the internal storage space of the MCU main control unit or the memory stores the power supply voltage information of the lithium battery Internet of things communication module.
3. The lithium battery Internet of things communication device of claim 1, characterized in that: the energy storage unit comprises an inductor L1, a capacitor C1 and a diode D1, one end of the inductor L1 and the negative electrode of the diode D1 are electrically connected with the output end of the control switch, and the other end of the inductor L1 is electrically connected with the positive electrode of the diode D1 through the capacitor C1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021721686.0U CN212905958U (en) | 2020-08-17 | 2020-08-17 | Lithium battery Internet of things communication device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021721686.0U CN212905958U (en) | 2020-08-17 | 2020-08-17 | Lithium battery Internet of things communication device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212905958U true CN212905958U (en) | 2021-04-06 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202021721686.0U Active CN212905958U (en) | 2020-08-17 | 2020-08-17 | Lithium battery Internet of things communication device |
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|---|---|
| CN (1) | CN212905958U (en) |
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- 2020-08-17 CN CN202021721686.0U patent/CN212905958U/en active Active
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Denomination of utility model: A lithium battery Internet of things communication device Effective date of registration: 20211109 Granted publication date: 20210406 Pledgee: Bank of Jiangsu Co., Ltd. Wuxi science and technology sub branch Pledgor: Wuxi Quanyu Electronic Technology Co., Ltd Registration number: Y2021320010457 |