CN217445050U - Portable lithium battery pack for industrial equipment - Google Patents

Portable lithium battery pack for industrial equipment Download PDF

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Publication number
CN217445050U
CN217445050U CN202220969961.3U CN202220969961U CN217445050U CN 217445050 U CN217445050 U CN 217445050U CN 202220969961 U CN202220969961 U CN 202220969961U CN 217445050 U CN217445050 U CN 217445050U
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circuit
pin
chip
ion battery
lithium ion
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史国庆
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Shenzhen Guishi South Technology Development Co ltd
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Shenzhen Guishi South Technology Development Co ltd
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Abstract

The utility model provides a portable lithium cell group that industrial equipment used, including the DC interface, lithium ion battery step-down charging pipeline circuit, lithium ion battery protection circuit, the lithium cell, DC-DC step-down circuit, lithium cell and DC-DC step-down circuit connect respectively at lithium ion battery protection circuit, this DC interface is used for external power supply after in proper order through lithium ion battery step-down charging pipeline circuit, lithium ion battery protection circuit charges the lithium cell, DC-DC step-down circuit is used for connecting external load in order to realize step-down constant voltage power supply, DC-DC step-down circuit's supply voltage comes from the discharge of lithium cell or is exported in proper order through lithium ion battery step-down charging pipeline circuit after the external power supply of DC interface, lithium ion battery protection circuit exports. The utility model discloses possess the management circuit that charges, lithium cell group need not to be equipped with special charger, only need certain voltage range's adapter can, consequently, the utility model discloses a lithium cell group suitability is stronger.

Description

Portable lithium battery pack for industrial equipment
Technical Field
The utility model relates to a lithium ion battery and the technical field that charges, concretely relates to portable lithium cell group that industrial equipment used.
Background
The lithium battery has the advantages of high energy density, high efficiency, reusability and the like, and is the first choice of application scenes such as new energy automobiles, photovoltaic energy storage, movable industrial equipment and the like. However, in the market, the portable lithium battery pack has few types, a low voltage platform and a single function, so that it is necessary to develop a lithium battery pack for industrial equipment, which has a high platform voltage, an industrial equipment DC interface, charge management and USB discharge.
SUMMERY OF THE UTILITY MODEL
Based on this, the utility model provides a portable lithium cell group that industrial equipment used to solve the technical problem that portable lithium cell group kind of prior art is less, voltage platform is low, and the function is single.
In order to achieve the above object, the utility model provides a portable lithium cell group for industrial equipment, it includes the DC interface, lithium ion battery step-down charging pipeline circuit, lithium ion battery protection circuit, the lithium cell, DC-DC step-down circuit, the DC interface, lithium ion battery step-down charging pipeline circuit, lithium ion battery protection circuit connects gradually, lithium cell and DC-DC step-down circuit connect respectively at lithium ion battery protection circuit, this DC interface is used for external power supply in proper order through lithium ion battery step-down charging pipeline circuit, lithium ion battery protection circuit charges the lithium cell, DC-DC step-down circuit is used for connecting external load in order to realize step-down constant voltage power supply, the supply voltage of DC-DC step-down circuit comes from the discharge of lithium cell or by DC interface external power supply after lithium ion battery step-down charging pipeline circuit in proper order, And the lithium ion battery protection circuit outputs the output.
As a further preferred technical scheme of the utility model, lithium ion battery step-down charging circuit includes chip BQ24170, common mode inductance T1, diode D2 and D3, MOS pipe Q1, Q2 and Q3, wherein:
pins 1 and 2 of the common mode inductor T1 are connected with a DC interface, a pin 3 is grounded, and a pin 4 is connected to the drain electrode of the MOS transistor Q3 through resistors R119 and R121 which are connected in parallel;
the sources of MOS tubes Q1, Q2 and Q3 are connected with equal potential, the gates of MOS tubes Q2 and Q3 are connected with equal potential with the drain of MOS tube Q1, the ACRV pin of chip BQ24170 is connected with the gate of MOS tube Q3 through resistor R8, the gate of MOS tube Q1 is connected with electricity through resistor R1, the gate of MOS tube Q1 is also connected with the source of MOS tube Q1 through resistor R2, the drain of MOS tube Q2 is connected with the ACP pin of chip BQ24170, the drain of MOS tube Q2 is connected with the PVCC pin of chip BQ24170 through resistor SRAC, resistor R3 is connected in series between the PVCC pin of chip BQ24170 and the ACN pin thereof, capacitor C3 is connected between the CAN pin of chip BQ24170 and the ACP pin thereof, capacitor C3 is connected between the ACP pin and the ground, the cathode of diode D3 is connected with the SW pin of chip BQ24170, the anode of diode D3 is connected with the anode of diode BQ 24172 and the anode of chip BQ 3, the anode of the diode B24172 and the diode B3 are connected with the anode of the diode B3 in series connected with the anode of the diode B36C 3 and the diode B3 and the anode of the diode B3 in parallel connected with the diode B3, the diode B3 and the diode 3, the anode of the diode D2 is connected with the drain of the MOS tube Q3, the cathode of the diode D2 is connected to the ground through a resistor R6 and a capacitor C14 which are sequentially connected in series, and the isoelectric point between the resistor R6 and the capacitor C14 is connected to the AVCC pin of the chip BQ 24170.
As a further preferred technical scheme of the utility model, lithium ion battery step-down charging circuit still includes inductance L1, and inductance L1's one end is connected with chip BQ 24170's SW pin, and inductance L1's the other end forms the output through resistance BSR1 and is connected to lithium ion battery protection circuit.
As a further preferred technical solution of the present invention, the lithium ion battery protection circuit includes a charging main circuit and a chip NT1777A, a positive electrode and a negative electrode of the charging main circuit are respectively connected to a positive electrode and a negative electrode of the DC interface, and the positive electrode of the charging main circuit is further connected to an output terminal of the lithium ion battery step-down charging circuit, a lithium battery pack is connected in series in the charging main circuit, a switching circuit controlled by the chip NT1777A is further connected in series in the charging main circuit, the switching circuit includes MOS transistors Q4 and Q5, a drain of the MOS transistor Q4 and a drain of the transistor Q5 are connected to a V-pin of the chip NT1777A through a resistor R32, a source of the MOS transistor Q4 and a source of the transistor Q5 are respectively connected to the charging main circuit, a gate of the MOS transistor Q38 is connected to a CO pin of the chip NT 17A through a resistor R34, a gate of the MOS transistor Q5 is connected to an NT 638 NT pin of the chip 1777 through a resistor R41, a source of the MOS transistor Q59623 is connected to a CS A, a VDD pin of the chip NT1777A is connected with the anode of the lithium battery pack through a diode D9, VSS pin and V1 pin of the chip NT1777A are both connected with the cathode of the lithium battery pack, the lithium battery pack is provided with a plurality of lithium batteries connected in series, a V2 pin of the chip NT1777A is connected with a battery cell B1 of the lithium battery pack through a resistor R37, a V3 pin of the chip NT1777A is connected with a battery cell B2 of the lithium battery pack through a resistor R36, and a V4 pin of the chip NT1777A is connected with the anode of the lithium battery pack through a resistor R33.
As the utility model discloses a further preferred technical scheme, DC-DC step-down circuit includes chip TPS62140, DC-DC step-down circuit is used for realizing 5V constant voltage output.
As a further preferred technical scheme of the utility model, portable lithium cell group that industrial equipment used still includes the power display circuit, the power display circuit with lithium ion battery protection circuit connects the electric quantity in order to be used for showing the lithium cell.
The utility model discloses a portable lithium cell group that industrial equipment used adopts above-mentioned technical scheme, can reach following beneficial effect:
1. the utility model discloses possess the charge management circuit, the lithium cell group need not to be equipped with special charger, only need the adapter of certain voltage range can, therefore, the utility model discloses a lithium cell group suitability is stronger;
2. the utility model discloses a lithium cell group both can supply power for DC direct current equipment, can supply power for low-voltage equipment such as cell-phone (5V output) again to make lithium cell group face of application wider.
Drawings
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
Fig. 1 is a schematic structural view of an example provided by a portable lithium battery pack for an industrial device according to the present invention;
fig. 2 is a circuit diagram of the lithium ion battery step-down charging circuit of the present invention;
fig. 3 is a circuit diagram of the lithium ion battery protection circuit of the present invention;
fig. 4 is a circuit diagram of the DC-DC voltage step-down circuit of the present invention;
fig. 5 is a circuit diagram of the power display circuit of the present invention.
The purpose of the present invention is to provide a novel and improved method and apparatus for operating a computer.
Detailed Description
The present invention will be further described with reference to the accompanying drawings and the detailed description. In the preferred embodiments, the terms "upper", "lower", "left", "right", "middle" and "a" are used for the sake of clarity only, and are not intended to limit the scope of the invention, its relative relationship between the terms and their derivatives, and the scope of the invention should be understood as being limited by the claims.
As shown in FIG. 1, the utility model provides a portable lithium cell group that industrial equipment used, including DC interface, lithium ion battery step-down charging pipeline circuit, lithium ion battery protection circuit, lithium cell, DC-DC step-down circuit, electric quantity display circuit, DC interface, lithium ion battery step-down charging pipeline circuit, lithium ion battery protection circuit connect gradually, and lithium cell and DC-DC step-down circuit connect respectively at lithium ion battery protection circuit, and this DC interface charges the lithium cell through lithium ion battery step-down charging pipeline circuit, lithium ion battery protection circuit in proper order after being used for external power supply, and DC-DC step-down circuit is used for connecting external load in order to realize step-down constant voltage power supply, and the supply voltage of DC-DC step-down circuit comes from the discharge of lithium cell or is in proper order behind the DC interface external power supply through lithium ion battery step-down charging pipeline circuit, DC-DC step-down charging circuit, The lithium ion battery protection circuit outputs the electric quantity, and the electric quantity display circuit is connected with the lithium ion battery protection circuit and used for displaying the electric quantity of the lithium cell.
Referring to fig. 2, the lithium ion battery buck charging circuit includes a chip BQ24170, a common mode inductor T1, diodes D2 and D3, and MOS transistors Q1, Q2, and Q3, where:
pins 1 and 2 of a common mode inductor T1 are connected with a DC interface, pin 3 is grounded, pin 4 is connected with the drain of a MOS tube Q3 through resistors R119 and R121 which are connected in parallel, the sources of MOS tubes Q1, Q2 and Q3 are connected with equal potential, the gates of MOS tubes Q2 and Q3 are connected with the drain of a MOS tube Q1 with equal potential, the ACRV pin of a chip BQ24170 is connected with the gate of a MOS tube Q3 through a resistor R8, the gate of the MOS tube Q1 is connected with electricity through a resistor R1, the gate of the MOS tube Q1 is also connected with the source of a MOS tube Q1 through a resistor R2, the drain of the MOS tube Q2 is connected with the ACP pin of the chip BQ24170, the drain of the MOS tube Q2 is connected with the PVCC pin of the chip BQ24170 through a resistor SRAC, a resistor R3 is connected in series between the PVCC pin of the chip BQ24170 and the ACN pin of the chip BQ24170, a capacitor is connected with the cathode of the SW 46C pin 4642 and the diode SW 46D pin of the chip BQ 4670, the anode of the diode D3 is grounded, the anode of the diode D3 is further connected with capacitors C1 and C2, the capacitors C1 and C2 are connected in parallel and then connected to a PVCC pin of the chip BQ24170, a capacitor C4 and a resistor R5 which are connected in series are further connected between the SW pin of the chip BQ24170 and the anode of the diode D3, the anode of the diode D2 is connected with the drain of the MOS tube Q3, the cathode of the diode D2 is connected to the ground through the resistor R6 and the capacitor C14 which are sequentially connected in series, and the equipotential point between the resistor R6 and the capacitor C14 is connected to the AVCC pin of the chip BQ 24170;
the lithium ion battery voltage-reducing charging pipeline circuit further comprises an inductor L1, one end of an inductor L1 is connected with a SW pin of a chip BQ24170, and the other end of the inductor L1 forms an output end through a resistor BSR1 and is connected to the lithium ion battery protection circuit.
The working principle of the lithium ion battery step-down charging pipeline circuit is as follows: when the lithium battery pack is charged, an external power adapter (within the range of 4.5V-17V) is connected to a DC interface, an AVCC pin of a chip BQ24170 supplies power for an IC, an input voltage protection value is set through OVPSET, the temperature of the battery pack is monitored by detecting TS pin voltage, when the input voltage and the battery core temperature are normal, the chip BQ24170 drives an MOS (metal oxide semiconductor) tube Q2 and a Q3 to be opened through an ACDRV pin, the battery pack enters a charging state through the normally-on D4, an output current is set through an ISET pin, the charging voltage is set through a CELL/FB pin, and a circuit outputs VCC _ B + to the rear stage.
Referring to fig. 3, the lithium ion battery protection circuit includes a charging main circuit and a chip NT1777A, wherein the positive electrode and the negative electrode of the charging main circuit are respectively connected to the positive electrode and the negative electrode of the DC interface, the positive electrode of the charging main circuit is further connected to the output terminal of the lithium ion battery step-down charging pipeline circuit, a lithium battery pack is connected in series in the charging main circuit, a switching circuit controlled by the chip NT1777A is further connected in series in the charging main circuit, the switching circuit includes MOS transistors Q4 and Q5, the drain of the MOS transistor Q4 and the drain of the transistor Q5 are connected to the V-pin of the chip NT 17A through a resistor R32, the source of the MOS transistor Q4 and the source of the transistor Q5 are respectively connected to the charging main circuit, the gate of the MOS transistor Q38 is connected to the CO pin of the chip NT 17A through a resistor R34, the gate of the MOS transistor Q41 9 is connected to the DO pin of the chip 1777 NT A through a resistor R6862, the source of the MOS transistor Q5 is further connected to the CS 1777 pin of the chip 1777, a VDD pin of the chip NT1777A is connected with the anode of the lithium battery pack through a diode D9, VSS pin and V1 pin of the chip NT1777A are both connected with the cathode of the lithium battery pack, the lithium battery pack is provided with a plurality of lithium batteries connected in series, a V2 pin of the chip NT1777A is connected with a battery cell B1 of the lithium battery pack through a resistor R37, a V3 pin of the chip NT1777A is connected with a battery cell B2 of the lithium battery pack through a resistor R36, and a V4 pin of the chip NT1777A is connected with the anode of the lithium battery pack through a resistor R33.
The lithium ion battery protection circuit monitors and protects the state of a lithium cell, and the lithium ion battery protection circuit specifically comprises the following steps: the chip NT1777A monitors the voltage of a battery cell B1 through a circuit where R21 and C18 are located and a V3 pin, monitors the voltage of the battery cell B2 through a circuit where R18 and C17 are located and a V4 pin, monitors the temperature through the voltage obtained by dividing the voltage of RT1 and R27 monitored through a VTH pin, monitors the current passing through the battery pack through the voltage difference between a VSS pin and a CS pin, namely the voltage at two ends of a resistor RS1, and when the voltage, the current and the temperature exceed the internal set threshold value of the chip NT1777A, the chip NT1777A closes Q2 and Q3MOS tubes on a main loop by closing the output voltages of the CO and DO pins, so that the main loop is cut off, and protection is realized.
Referring to fig. 4, the DC-DC voltage reduction circuit includes a chip TPS62140, and the DC-DC voltage reduction circuit is used to implement 5V constant voltage output, and may supply power to mobile devices such as a mobile phone. The method comprises the following concrete steps: VCC _ B + powers the chip through the EN pin of TPS62140, TPS62140 sets the output voltage USB + through the FB pin, the FB pin reference voltage is 0.8V, the output voltage is set to 5V by setting R30-280K, R29-1.5M: and the four resistors R101, R102, R103 and R104 are identification resistors of the apple mobile phone.
Referring to fig. 5, the electric quantity display circuit controls the electric quantity display of the lithium battery in a low level triggering or locking mode, and displays the electric quantity in a 4-lamp-grid mode so as to display the residual electric quantity of the lithium battery cell in the lithium battery pack. The concrete implementation steps are as follows: VCC _ B + is reduced to VCC _5V through LDO (TLV70450), VCC _5V supplies power for U2(HM1163), HM1163 detects the voltage of VCC _ B + through the test pin, judges the electric quantity according to the voltage value, and represents the residual electric quantity of the battery pack through Led1, Led2, Led3 and Led4 driving Led lamps.
Although specific embodiments of the present invention have been described above, it will be appreciated by those skilled in the art that these are merely examples and that many changes and modifications may be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims.

Claims (6)

1. A portable lithium battery pack for industrial equipment is characterized by comprising a DC interface, a lithium ion battery voltage reduction charging pipeline circuit, a lithium ion battery protection circuit, a lithium battery cell and a DC-DC voltage reduction circuit, the DC interface, the lithium ion battery voltage reduction charging pipeline circuit and the lithium ion battery protection circuit are sequentially connected, the lithium cell and the DC-DC voltage reduction circuit are respectively connected with the lithium ion battery protection circuit, the DC interface is used for charging the lithium battery cell through the lithium ion battery step-down charging pipeline circuit and the lithium ion battery protection circuit in sequence after being externally connected with a power supply, the DC-DC step-down circuit is used for connecting an external load to realize step-down constant-voltage power supply, and the power supply voltage of the DC-DC step-down circuit is discharged from the lithium battery cell or is output through the lithium ion battery step-down charging pipeline circuit and the lithium ion battery protection circuit in sequence after being externally connected with the power supply through the DC interface.
2. The portable lithium battery pack for industrial equipment as claimed in claim 1, wherein the lithium ion battery buck charging circuit comprises a chip BQ24170, a common mode inductor T1, diodes D2 and D3, and MOS transistors Q1, Q2 and Q3, wherein:
pins 1 and 2 of the common-mode inductor T1 are connected with a DC interface, pin 3 is grounded, and pin 4 is connected to the drain electrode of the MOS transistor Q3 through resistors R119 and R121 which are connected in parallel;
the sources of MOS tubes Q1, Q2 and Q3 are connected with equal potential, the gates of MOS tubes Q2 and Q3 are connected with equal potential with the drain of MOS tube Q1, the ACRV pin of chip BQ24170 is connected with the gate of MOS tube Q3 through resistor R8, the gate of MOS tube Q1 is connected with electricity through resistor R1, the gate of MOS tube Q1 is also connected with the source of MOS tube Q1 through resistor R2, the drain of MOS tube Q2 is connected with the ACP pin of chip BQ24170, the drain of MOS tube Q2 is connected with the PVCC pin of chip BQ24170 through resistor SRAC, resistor R3 is connected in series between the PVCC pin of chip BQ24170 and the ACN pin thereof, capacitor C3 is connected between the CAN pin of chip BQ24170 and the ACP pin thereof, capacitor C3 is connected between the ACP pin and the ground, the cathode of diode D3 is connected with the SW pin of chip BQ24170, the anode of diode D3 is connected with the anode of diode BQ 24172 and the anode of chip BQ 3, the anode of the diode B24172 and the diode B3 are connected with the anode of the diode B3 in series connected with the anode of the diode B36C 3 and the diode B3 and the anode of the diode B3 in parallel connected with the diode B3, the diode B3 and the diode 3, the anode of the diode D2 is connected with the drain of the MOS tube Q3, the cathode of the diode D2 is connected to the ground through a resistor R6 and a capacitor C14 which are sequentially connected in series, and the isoelectric point between the resistor R6 and the capacitor C14 is connected to the AVCC pin of the chip BQ 24170.
3. The portable lithium battery pack for the industrial equipment as claimed in claim 2, wherein the lithium ion battery voltage reduction charging circuit further comprises an inductor L1, one end of the inductor L1 is connected to the SW pin of the chip BQ24170, and the other end of the inductor L1 forms an output terminal through a resistor BSR1 and is connected to the lithium ion battery protection circuit.
4. The portable lithium battery pack for industrial equipment according to claim 3, wherein the lithium ion battery protection circuit comprises a charging main circuit and a chip NT1777A, the positive electrode and the negative electrode of the charging main circuit are respectively connected with the positive electrode and the negative electrode of the DC interface, the positive electrode of the charging main circuit is further connected with the output end of the lithium ion battery step-down charging circuit, the lithium battery pack is connected in series in the charging main circuit, a switching circuit controlled by the chip NT1777A is further connected in series in the charging main circuit, the switching circuit comprises MOS tubes Q4 and Q5, the drain of the MOS tube Q4 and the drain of the Q7 are connected together and then connected to the V-pin of the chip NT1777A through a resistor R32, the source of the MOS tube Q4 and the source of the Q5 are respectively connected with the charging main circuit, the gate of the MOS tube Q4 is connected to the CO pin of the chip NT 1784 through a resistor R6353984, the gate of the MOS tube Q5 is connected to the DO pin of the chip 1777A through a resistor R41, the source of the MOS transistor Q5 is further connected to a CS pin of a chip NT1777A through a resistor R35, a VDD pin of the chip NTl777A is connected to an anode of a lithium battery pack through a diode D9, a VSS pin and a V1 pin of the chip NT1777A are both connected to a cathode of the lithium battery pack, the lithium battery pack has a plurality of lithium batteries connected in series, a V2 pin of the chip NT1777A is connected to a cell B1 of the lithium battery pack through a resistor R37, a V3 pin of the chip NT1777A is connected to a cell B2 of the lithium battery pack through a resistor R36, and a V4 pin of the chip NT17 1777A is connected to the anode of the lithium battery pack through a resistor R33.
5. The portable lithium battery pack for industrial equipment as claimed in claim 4, wherein the DC-DC voltage reduction circuit comprises a chip TPS62140, and the DC-DC voltage reduction circuit is used for realizing 5V constant voltage output.
6. The portable lithium battery pack for industrial equipment according to any one of claims 1 to 5, further comprising a power display circuit connected to the lithium ion battery protection circuit for displaying the power of the lithium battery cell.
CN202220969961.3U 2022-04-21 2022-04-21 Portable lithium battery pack for industrial equipment Active CN217445050U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202220969961.3U CN217445050U (en) 2022-04-21 2022-04-21 Portable lithium battery pack for industrial equipment

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202220969961.3U CN217445050U (en) 2022-04-21 2022-04-21 Portable lithium battery pack for industrial equipment

Publications (1)

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CN217445050U true CN217445050U (en) 2022-09-16

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