A BMS electric quantity reading device

Abstract

The utility model relates to BMS electric quantity reading technical field discloses a kind of BMS electric quantity reading device, including power supply unit, control unit, communication interface unit, display unit and buzzer unit;Control unit obtains the SOC information of lithium battery from BMS by communication interface unit;Control unit is electrically connected with display unit, and SOC information is shown by display unit;Control unit is electrically connected with buzzer unit, and prompt sound is sent by buzzer unit;In actual use, the utility model under the condition that working voltage is provided by power supply unit, control unit can obtain the SOC information of lithium battery from the BMS of lithium battery by communication interface unit, and SOC information is displayed in display unit, to facilitate staff to check SOC information, facilitate the production of lithium battery.

Description

TECHNICAL FIELD

[0001] The utility model relates to BMS electric quantity reading technical field, concretely relates to a BMS electric quantity reading device. BACKGROUND

[0002] In the actual production process of lithium battery, the SOC value of the battery in some work orders can be controlled in a certain interval range according to customer demand, for example, the SOC value is controlled between 30% and 50%. For finished lithium battery, some finished lithium battery has a display screen, at this time, the SOC value of the battery can be displayed through the display screen. However, for the finished lithium battery without display function, the SOC value of the lithium battery cannot be actually observed, which will affect the production of the battery. In addition, for the lithium battery, the BMS (BATTERY MANAGEMENT SYSTEM, battery management system) matched with the lithium battery has the electric quantity information of the lithium battery. SUMMARY

[0003] In view of the deficiencies of the background art, the utility model provides a BMS electric quantity reading device for reading the SOC value of the lithium battery without display function.

[0004] To solve the above technical problems, the utility model provides the following technical scheme: a BMS electric quantity reading device, including power supply unit, control unit, communication interface unit, display unit and buzzer unit;The control unit is communicated with the BMS through the communication interface unit, and the SOC information of the lithium battery is acquired from the BMS;The communication interface unit includes power supply end, the power supply unit is electrically connected with the power supply end, and the voltage of the power supply end provides working voltage for the control unit and display unit;The control unit is electrically connected with the display unit, and the SOC information is displayed through the display unit;The control unit is electrically connected with the buzzer unit, and prompt sound is sent through the buzzer unit.

[0005] In certain embodiments, the control unit includes a single-chip microcomputer U5 with model GD32F303CGT6.

[0006] In certain embodiments, the utility model further includes a reset unit, which is electrically connected with the control unit and is used to provide a reset signal for the control unit when powered on.

[0007] In certain embodiments, the reset unit comprises a key K5, a resistor R43, a resistor R45 and a capacitor C35, one end of the resistor R43 is electrically connected with the working voltage output end of the power supply unit, the other end of the resistor R43 is electrically connected with one end of the resistor R45 and one end of the key K5 respectively, the other end of the resistor R45 and one end of the capacitor C36 are electrically connected, for outputting the reset signal, the other end of the key K5 and the other end of the capacitor C36 are both grounded.

[0008] In certain embodiments, the communication interface unit comprises an interface JP3, one terminal of the interface JP3 is a power supply terminal of the communication interface unit, the two terminal of the interface JP3 is electrically connected with one end of a resistor R48, the three terminal of the interface terminal JP3 is electrically connected with one end of a resistor R49, the four terminal and the seven terminal of the interface JP3 are both grounded, the five terminal of the interface JP3 is electrically connected with one end of a resistor R66, the six terminal of the interface JP3 is electrically connected with one end of a resistor R67, the other end of the resistor R48, the other end of the resistor R49, the other end of the resistor R66 and the other end of the resistor R67 are electrically connected with the control unit respectively.

[0009] In certain embodiments, the display unit comprises a display screen TFT1 with a model of TM024HDH26-V02, one terminal and eight terminal of the display screen TFT1 are electrically connected with one end of a resistor R1 and one end of a resistor R2, the other end of the resistor R1 and the other end of the resistor R2 are both grounded; the two terminal, the three terminal, the four terminal, the five terminal and the six terminal of the display screen TFT1 are electrically connected with one end of a resistor R24, one end of a resistor R26, one end of a resistor R27, one end of a resistor R28 and one end of a resistor R30 respectively, the other end of the resistor R24, the other end of the resistor R26, the other end of the resistor R27, the other end of the resistor R28 and the other end of the resistor R30 are electrically connected with the control unit respectively; the nine terminal and the ten terminal of the display screen TFT1 are electrically connected with the working voltage output end of the power supply unit; the eleven terminal, the twelve terminal, the thirteen terminal and the fourteen terminal of the display screen TFT1 are electrically connected with the collector of a triode Q1, the base of the triode Q1 is electrically connected with the control unit through a resistor R35, and the emitter of the triode Q1 is grounded.

[0010] In certain embodiments, the utility model further comprises a storage unit, the control unit is electrically connected with the storage unit, and the working parameters are stored through the storage unit.

[0011] In certain embodiments, the utility model still include at least one key unit, the key unit includes resistance R22, resistance R25, electric capacity C25 and key K1, one end of resistance R22 is connected with the working voltage output end of power supply unit electricity, the other end of resistance R22 is connected with resistance R25 one end and key K1 one end electricity respectively, the other end of resistance R22 electric capacity C25 one end is connected, be used for with control unit electricity, the other end of key K1 and electric capacity C25 other end are all grounded.

[0012] In certain embodiments, the power supply unit includes a power chip U1 of model AMS1117-3.3, the No. 3 pin of the power chip U1 is electrically connected with the power supply end of the communication interface unit, and is grounded through the capacitor C3 and the capacitor C4 respectively, the No. 1 pin of the power chip U1 is grounded, and the No. 2 pin of the power chip U1 is used for outputting the working voltage and is grounded through the capacitor C1 and the capacitor C2 respectively.

[0013] In certain embodiments, the buzzer unit includes a buzzer LS1, one end of the buzzer LS1 is electrically connected with one end of a resistor R41 and a cathode of a diode D1 respectively, the other end of the resistor R41 is electrically connected with the power supply end of the communication interface unit, the other end of the buzzer LS1 is electrically connected with a collector of a transistor Q2 and an anode of the diode D1 respectively, a base of the transistor Q2 is electrically connected with the control unit through a resistor R46, and an emitter of the transistor Q2 is grounded.

[0014] The utility model has the beneficial effects compared with prior art: in the case that the working voltage is provided by the power supply unit, the control unit can obtain the SOC information of the lithium battery from the BMS of the lithium battery through the communication interface unit, and display the SOC information on the display unit, so as to facilitate the staff to check the SOC information. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is the structural schematic diagram of the utility model in the embodiment;

[0016] Figure 2 It is the circuit diagram of the control unit in the embodiment;

[0017] Figure 3 It is the circuit diagram of the communication interface unit in the embodiment;

[0018] Figure 4 It is the circuit diagram of the power supply unit in the embodiment;

[0019] Figure 5 It is the circuit diagram of the reset unit in the embodiment;

[0020] Figure 6Circuit diagram of the three key units in the embodiment;

[0021] Figure 7 Circuit diagram of the storage unit in the embodiment;

[0022] Figure 8 Circuit diagram of the display unit in the embodiment;

[0023] Figure 9 Circuit diagram of the buzzer unit in the embodiment. DETAILED DESCRIPTION

[0024] The utility model will be explained in further detail in combination with the drawings. These drawings are all simplified schematic diagrams, and only schematically illustrate the basic structure of the utility model, so they only show the structure related to the utility model.

[0025] As Figure 1 shown, a BMS electric quantity reading device includes a power supply unit 1, a control unit 2, a communication interface unit 3, a display unit 4 and a buzzer unit 5; the control unit 2 is in communication connection with the BMS through the communication interface unit 3, and acquires the SOC information of the lithium battery from the BMS; the communication interface unit 3 includes a power supply end, the power supply unit 1 is electrically connected with the power supply end, and the voltage based on the power supply end provides the working voltage VDD for the control unit 2 and the display unit 4; the control unit 2 is electrically connected with the display unit 4, and displays the SOC information through the display unit 4; the control unit 3 is electrically connected with the buzzer unit 5, and sends a prompt sound through the buzzer unit 5.

[0026] In actual use, the utility model can acquire the SOC information of the lithium battery from the BMS of the lithium battery through the communication interface unit 3 by the control unit 2 under the condition that the working voltage VDD is provided by the power supply unit 1, and display the SOC information on the display unit 4, so as to facilitate the staff to check the SOC information and facilitate the actual production of the lithium battery.

[0027] Specifically, in the embodiment, as Figure 2 shown, the control unit includes a single-chip microcomputer U5 with the model GD32F303CGT6. In addition, in the Figure 2 , the crystal oscillator X1 and the crystal oscillator X2 provide the clock signal for the single-chip microcomputer U5.

[0028] Specifically, in the embodiment, the communication interface unit 3 comprises an interface JP3, a first terminal of the interface JP3 is a power terminal of the communication interface unit 3, a second terminal of the interface JP3 is electrically connected with one end of a resistor R48, a third terminal of the interface JP3 is electrically connected with one end of a resistor R49, a fourth terminal and a seventh terminal of the interface JP3 are grounded, a fifth terminal of the interface JP3 is electrically connected with one end of a resistor R66, a sixth terminal of the interface JP3 is electrically connected with one end of a resistor R67, the other end of the resistor R48, the other end of the resistor R49, the other end of the resistor R66 and the other end of the resistor R67 are electrically connected with the control unit 2 respectively.

[0029] In actual use, the control unit 2 can not only communicate with the BMS through the communication interface unit 3, but also can program through the communication interface unit 3.

[0030] Specifically, in the embodiment, as shown in the figure, Figure 4 The power supply unit 1 comprises a power chip U1 with a model of AMS1117-3.3, a third pin of the power chip U1 is electrically connected with the power terminal of the communication interface unit, and is grounded through a capacitor C3 and a capacitor C4 respectively, a first pin of the power chip U1 is grounded, and a second pin of the power chip U1 is used for outputting a working voltage VDD and is grounded through a capacitor C1 and a capacitor C2 respectively.

[0031] In addition, in the embodiment, Figure 4 The capacitor C4 and the capacitor C1 have positive and negative poles. Figure 4 The working voltage VDD in the embodiment is a 3.3V voltage.

[0032] In the embodiment, Figure 1 The utility model also includes a reset unit 6, the reset unit 6 is electrically connected with the control unit 2, and is used for providing a reset signal for the control unit 2 when power on.

[0033] In the embodiment, Figure 5 The reset unit 6 comprises a button K5, a resistor R43, a resistor R45 and a capacitor C35, one end of the resistor R43 is electrically connected with the working voltage VDD output terminal of the power supply unit, the other end of the resistor R43 is electrically connected with one end of the resistor R45 and one end of the button K5 respectively, the other end of the resistor R45 and one end of the capacitor C36 are electrically connected, which are used for outputting a reset signal, and the other end of the button K5 and the other end of the capacitor C36 are grounded.

[0034] In actual use, when the device is powered on, the voltage across the capacitor C36 cannot be suddenly changed, and the voltage across the capacitor C36 will gradually increase with the charging, thereby providing a reset signal for the reset pin of the single-chip microcomputer U5, so that the single-chip microcomputer U5 generates a hard reset.

[0035] In the embodiment, the utility model also includes at least one key unit 7. Exemplarily, three key units 7 can be included, and the circuit of the three key units 7 is as shown in the figure. Figure 6 Figure 6 Taking the left key unit 7 as an example, the key unit 7 includes a resistor R22, a resistor R25, a capacitor C25 and a key K1, one end of the resistor R22 is electrically connected with the working voltage VDD output end of the power supply unit, the other end of the resistor R22 is electrically connected with one end of the resistor R25 and one end of the key K1 respectively, the other end of the resistor R22 is electrically connected with one end of the capacitor C25, which is used to be electrically connected with the control unit, and the other end of the key K1 and the other end of the capacitor C25 are both grounded.

[0036] In actual use, the operator can judge whether the displayed setting parameters meet the requirements according to the test requirements, and if adjustment is needed, the three key units 7 can be used for adjustment.

[0037] In the embodiment, the utility model also includes a storage unit 8, and the control unit 2 is electrically connected with the storage unit 8, and the working parameters are stored through the storage unit 8. Figure 1 Exemplarily, the circuit of a storage unit 8 is as shown in the figure, and the storage chip U8 is of the type W25Q16.

[0038] Figure 7 Specifically, in the embodiment, the circuit of the display unit 4 is as shown in the figure, and the display unit 4 includes a display screen TFT1 of the type TM024HDH26-V02.

[0039] Specifically, in the embodiment, the circuit of the display unit 4 is as shown in the figure, and the display unit 4 includes a display screen TFT1 of the type TM024HDH26-V02. Figure 8

[0040] In actual use, in addition to displaying the SOC information, the display unit 4 can also be used to display the voltage information and the current information of the lithium battery.​​​

[0041] Specifically, as shown in Figure 9 The buzzer unit 5 includes a buzzer LS1, one end of which is electrically connected with one end of a resistor R41 and a cathode of a diode D1, the other end of the resistor R41 is electrically connected with a power supply end of the communication interface unit 3, the other end of the buzzer LS1 is electrically connected with a collector of a triode Q2 and an anode of the diode D1, a base of the triode Q2 is electrically connected with the control unit 2 through a resistor R46, and an emitter of the triode Q2 is grounded.

[0042] In actual use, the control unit 2 controls the triode Q2 to be on or off to make the buzzer LS1 emit sound. In addition, when the lithium battery reaches the required power, the buzzer LS1 emits sound to prompt, so that the production personnel can be reminded to perform relevant operations.

[0043] According to the above description, the related personnel can make various changes and modifications without deviating from the technical idea of the utility model. The technical scope of the utility model is not limited to the content of the specification, and the technical scope must be determined according to the scope of claims.

Claims

1. A BMS power reading device, characterized in that, The application relates to a lithium battery SOC information display device which comprises a power supply unit, a control unit, a communication interface unit, a display unit and a buzzer unit; the control unit is in communication connection with the BMS through the communication interface unit, and acquires the SOC information of the lithium battery from the BMS; The communication interface unit comprises a power supply end, the power supply unit is electrically connected with the power supply end, the voltage of the power supply end is used for providing working voltage for the control unit and the display unit; the control unit is electrically connected with the display unit, and the SOC information is displayed through the display unit; the control unit is electrically connected with the buzzer unit, and prompt sound is emitted through the buzzer unit.

2. The BMS charge reading device of claim 1, wherein, The control unit comprises a single-chip microcomputer U5 with a model of GD32F303CGT6.

3. The BMS charge reading device of claim 1, wherein, The application further comprises a reset unit which is electrically connected with the control unit and is used for providing a reset signal for the control unit when power is supplied.

4. The BMS charge reading device of claim 3, wherein, The reset unit comprises a key K5, a resistor R43, a resistor R45 and a capacitor C35; one end of the resistor R43 is electrically connected with the working voltage output end of the power supply unit; the other end of the resistor R43 is electrically connected with one end of the resistor R45 and one end of the key K5 respectively; the other end of the resistor R45 and one end of the capacitor C36 are electrically connected, and are used for outputting the reset signal; the other end of the key K5 and the other end of the capacitor C36 are grounded.

5. The BMS charge reading device of claim 1, wherein, The communication interface unit comprises an interface JP3; one terminal of the interface JP3 is a power supply end of the communication interface unit; the two-terminal of the interface JP3 is electrically connected with one end of a resistor R48; the three-terminal of the interface JP3 is electrically connected with one end of a resistor R49; the four-terminal and the seven-terminal of the interface JP3 are grounded; the five-terminal of the interface JP3 is electrically connected with one end of a resistor R66; the six-terminal of the interface JP3 is electrically connected with one end of a resistor R67; the other end of the resistor R48, the other end of the resistor R49, the other end of the resistor R66 and the other end of the resistor R67 are electrically connected with the control unit respectively.

6. The BMS charge reading device of claim 1, wherein, The display unit comprises a display screen TFT1 with a model of TM024HDH26-V02; one terminal and eight terminals of the display screen TFT1 are electrically connected with one end of a resistor R1 and one end of a resistor R2; the other end of the resistor R1 and the other end of the resistor R2 are grounded; two terminals, three terminals, four terminals, five terminals and six terminals of the display screen TFT1 are electrically connected with one end of a resistor R24, one end of a resistor R26, one end of a resistor R27, one end of a resistor R28 and one end of a resistor R30 respectively; the other end of the resistor R24, the other end of the resistor R26, the other end of the resistor R27, the other end of the resistor R28 and the other end of the resistor R30 are electrically connected with the control unit respectively; nine terminals and ten terminals of the display screen TFT1 are electrically connected with the working voltage output end of the power supply unit; eleven terminals, twelve terminals, thirteen terminals and fourteen terminals of the display screen TFT1 are electrically connected with the collector of a triode Q1; the base of the triode Q1 is electrically connected with the control unit through a resistor R35; the emitter of the triode Q1 is grounded.

7. The BMS charge reading device of claim 1, wherein, It also includes a storage unit, the control unit and the storage unit are electrically connected, through the storage unit to store the working parameters.

8. The BMS charge reading device of claim 1, wherein, It also includes at least one key unit, the key unit includes resistance R22, resistance R25, capacitor C25 and key K1, one end of the resistance R22 and the working voltage output end of the power supply unit are electrically connected, the other end of the resistance R22 is respectively connected with one end of the resistance R25 and one end of the key K1, the other end of the resistance R22 is connected with one end of the capacitor C25, which is used to be electrically connected with the control unit, the other end of the key K1 and the other end of the capacitor C25 are grounded.

9. The BMS charge reading device of claim 1, wherein, The power supply unit includes power chip U1 with model AMS1117-3.3, the No. 3 pin of the power chip U1 is electrically connected with the power supply end of the communication interface unit, and is grounded through capacitor C3 and capacitor C4 respectively, the No. 1 pin of the power chip U1 is grounded, the No. 2 pin of the power chip U1 is used to output the working voltage, and is grounded through capacitor C1 and capacitor C2 respectively.

10. The BMS charge reading device of claim 1, wherein, The buzzer unit includes buzzer LS1, one end of the buzzer LS1 is respectively electrically connected with one end of the resistance R41 and the cathode of the diode D1, the other end of the resistance R41 is electrically connected with the power supply end of the communication interface unit, the other end of the buzzer LS1 is respectively electrically connected with the collector of the triode Q2 and the anode of the diode D1, the base of the triode Q2 is electrically connected with the control unit through the resistance R46, and the emitter of the triode Q2 is grounded.

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