CN211930277U

CN211930277U - 5V lithium titanate battery capable of charging and discharging at low temperature and high current

Info

Publication number: CN211930277U
Application number: CN201922485347.0U
Authority: CN
Inventors: 毛艳; 黎傲杰; 周燕; 黎霞; 温伟超
Original assignee: Shenzhen Shun Amperex Technology Ltd
Current assignee: Shenzhen Shun Amperex Technology Ltd
Priority date: 2019-12-30
Filing date: 2019-12-30
Publication date: 2020-11-13
Anticipated expiration: 2029-12-30

Abstract

The utility model discloses a but 5V lithium titanate battery that extreme low temperature heavy current was filled and discharged belongs to lithium titanate battery technical field, including lithium titanate battery, protection circuit and boost circuit and the shell that lithium titanate battery includes, the one end of shell is connected discharge port plug and charge port plug respectively, protection circuit includes monitoring chip U1, monitoring chip U1's 2 interface connection resistance R2's one end, resistance R2's the other end connects the source electrode of first group field effect transistor respectively, and resistance R6's one end, resistance R6's the other end external output end T, resistance R6's the external output end P "of one end, monitoring chip U1's 1 wiring termination second group field effect transistor's base, monitoring chip U1's 3 wiring termination first group field effect transistor's base, monitoring chip U1's 6 wiring termination second group field effect transistor's source electrode, and the drain electrode of the second group of field effect transistors is connected with the drain electrode of the first group of field effect transistors.

Description

5V lithium titanate battery capable of charging and discharging at low temperature and high current

Technical Field

The utility model relates to a lithium titanate battery especially relates to a but 5V lithium titanate battery that extreme low temperature heavy current was filled and is filled belongs to lithium titanate battery technical field.

Background

At present, common mobile power supplies (the voltage is mostly 5V) on the market are widely applied to emergency charging of various wireless electronic devices, some electronic devices such as mobile phones, tablet computers and the like have high power consumption, people who go out and go on a business basically bring one mobile power supply, in addition, a certain part of electronic devices exist, the input voltage is also designed by using 5V voltage, and the mobile power supplies can be used for taking the devices as input power supplies at some times.

The common booster circuit of the mobile power supply is integrated with a battery in a plastic shell or a metal shell, so that the application of the booster circuit is still limited in some specific occasions, and some research and development personnel need to disassemble the mobile power supply when needing to obtain 5V direct-current voltage. Sometimes, a pile of ordinary lithium batteries in hands cannot provide mobile direct-current voltage for specific 5V input equipment, and in addition, the ordinary batteries can only be used in an environment of-10 ℃ to 60 ℃ generally, and cannot perform normal functions if the ordinary batteries are influenced by low temperature in a severe cold region.

The common mobile power supply is mostly designed with an energy-saving function of automatic power off, and for some low-current devices, the common mobile power supply can not detect the current value and perform power off treatment, namely, the common mobile power supply can not continuously supply electric energy, and for some high-current devices, the common mobile power supply can be cut off due to the too low current value.

SUMMERY OF THE UTILITY MODEL

The utility model mainly aims at providing a but 5V lithium titanate battery that extreme low temperature heavy current was filled and is discharged, lithium titanate battery joins in marriage 2 series connection and carries out spot welding after organizing, the one end welding of charging port plug is in lithium titanate battery's the mouth that charges, the other end then is used for connecting the charger and charges for 5V lithium titanate battery, the mouth that discharges of discharging port plug welding at lithium titanate battery, the other end then is used for connecting 5V consumer, can be for the electronic product power supply of 5V input, 10A charge function and 15A discharge function have, solve 5V heavy current equipment's demand confusion, and can use under the condition of low temperature-30 ℃, enlarge usable floor area and scope.

The purpose of the utility model can be achieved by adopting the following technical scheme:

A5V lithium titanate battery capable of being charged and discharged at a low temperature and a large current comprises a lithium titanate battery, a protection circuit, a booster circuit and a shell of the lithium titanate battery, one end of the shell is respectively connected with a discharging port plug and a charging port plug, the protection circuit comprises a monitoring chip U1, the 2 interface of the monitoring chip U1 is connected with one end of a resistor R2, the other end of the resistor R2 is respectively connected with the source electrode of the first group of field effect transistors, and one end of the resistor R6, the other end of the resistor R6 is externally connected with the output end T, one end of the resistor R6 is externally connected with the output end-P, the 1 wire of the monitoring chip U1 is connected with the base electrode of the second group of field effect transistors, the 3 wire of the monitoring chip U1 is connected with the base electrode of the first group of field effect transistors, and the 6 connection end of the monitoring chip U1 is connected with the source electrode of a second group of field effect transistors, and the drain electrodes of the second group of field effect transistors are connected with the drain electrodes of the first group of field effect transistors.

Preferably, the terminal 6 of the monitoring chip U1 is further connected with one end of a capacitor C1, the other end of the capacitor C1 is connected with one end of a resistor R1, the other end of the resistor R1 outputs terminals B + and P +, and the terminal 6 of the monitoring chip U1 outputs a terminal B-.

Preferably, the boost circuit comprises a boost chip U3, a 1 connection terminal of the boost chip U3 is connected with one end of an inductor L1, the other end of the inductor L1 is externally connected with a P + connection terminal, the 1 connection terminal of the boost chip U3 is connected with an anode of a diode D1, and a cathode of the diode D1 outputs a +5V power supply.

Preferably, the terminal 2 of the boost chip U3 is externally connected to one end of a capacitor C3 and one end of a capacitor C2 and is externally connected to a P-terminal, and the other end of the capacitor C2 and the other end of the capacitor C3 are connected to the other end of the inductor L1.

Preferably, the 3-terminal of the boost chip U3 is externally connected with one end of a resistor R4, the other end of the resistor R4 is externally connected with a P-terminal, the 3-terminal of the boost chip U3 is also connected with one end of a resistor R5, the other end of the resistor R5 is externally connected with one end of a capacitor C4, and the other end of the capacitor C4 is connected with the other end of the resistor R4.

Preferably, the 4 interface and the 5 interface of the boost chip U3 are both connected to one end of a capacitor C4 and one end of a capacitor C5, and the other end of the capacitor C4 is connected to the other end of the capacitor C4.

The utility model has the advantages of:

the utility model provides a pair of but 5V lithium titanate battery that limit low temperature heavy current was filled and is filled, 2 series connection carry out spot welding after lithium titanate battery joined in marriage, the one end welding of charging port plug is in lithium titanate battery's the mouth that charges, the other end then is used for connecting the charger and charges for 5V lithium titanate battery, the mouth that discharges of port plug welding at lithium titanate battery, the other end then is used for connecting 5V consumer, can be for the electronic product power supply of 5V input, 10A charge function and 15A discharge function have, solve 5V heavy current equipment's demand confusion, and can use under the low temperature-30 ℃ condition, enlarge usable floor area and scope.

Drawings

Fig. 1 is an overall three-dimensional structure diagram of a preferred embodiment of a 5V lithium titanate battery capable of extreme low-temperature large-current charging and discharging according to the present invention;

fig. 2 is a protection circuit diagram of a preferred embodiment of a 5V lithium titanate battery capable of extreme low-temperature large-current charging and discharging according to the present invention;

fig. 3 is a voltage boosting circuit diagram of a preferred embodiment of a 5V lithium titanate battery capable of extreme low-temperature large-current charging and discharging according to the present invention.

In the figure: 1-lithium titanate battery, 2-shell, 3-charging port plug, 4-discharging port plug.

Detailed Description

In order to make the technical solutions of the present invention clearer and clearer for those skilled in the art, the present invention will be described in further detail with reference to the following embodiments and the accompanying drawings, but the embodiments of the present invention are not limited thereto.

As shown in fig. 1-3, the 5V lithium titanate battery capable of performing charge and discharge at a limited low temperature and a large current provided by this embodiment includes a lithium titanate battery 1, a protection circuit, a voltage boost circuit, and a housing 2 included in the lithium titanate battery 1, one end of the housing 2 is respectively connected to a discharge port plug 4 and a charge port plug 3, the protection circuit includes a monitoring chip U1, a 2 interface of the monitoring chip U1 is connected to one end of a resistor R2, the other end of the resistor R2 is respectively connected to sources of a first group of field effect transistors, and one end of a resistor R6, the other end of the resistor R6 is externally connected with an output end T, one end of a resistor R6 is externally connected with an output end p-, a 1 wiring end of a monitoring chip U1 is connected with a base electrode of the second group of field effect transistors, a 3 wiring end of the monitoring chip U1 is connected with a base electrode of the first group of field effect transistors, a 6 wiring end of a monitoring chip U1 is connected with a source electrode of the second group of field effect transistors, and drain electrodes of the second group of field effect transistors are connected with drain electrodes of the.

2 establish ties and carry out spot welding after the lithium titanate battery is joined in marriage the group, and the one end welding of charging port plug 3 is held at the charging port of lithium titanate battery, and the other end then is used for connecting the charger and charges for 5V lithium titanate battery, and 4 welding of discharging port plug are held at the discharging port of lithium titanate battery, and the other end then is used for connecting 5V consumer.

In this embodiment, the terminal 6 of the monitor chip U1 is further connected to one terminal of a capacitor C1, the other terminal of the capacitor C1 is connected to one terminal of a resistor R1, the other terminal of the resistor R1 outputs terminals B + and P +, and the terminal 6 of the monitor chip U1 outputs a terminal B-.

In this embodiment, the boost circuit includes a boost chip U3, the 1 terminal of the boost chip U3 is connected to one end of an inductor L1, the other end of the inductor L1 is externally connected to a P + terminal, the 1 terminal of the boost chip U3 is connected to the anode of a diode D1, and the cathode of a diode D1 outputs a +5V power supply.

In the embodiment, the terminal 2 of the boost chip U3 is externally connected with one end of a capacitor C3 and one end of a capacitor C2 and is externally connected with a P-terminal, and the other end of the capacitor C2 and the other end of the capacitor C3 are connected with the other end of an inductor L1.

In this embodiment, the terminal 3 of the boost chip U3 is externally connected to one end of the resistor R4, the other end of the resistor R4 is externally connected to the P-terminal, the terminal 3 of the boost chip U3 is further connected to one end of the resistor R5, the other end of the resistor R5 is externally connected to one end of the capacitor C4, and the other end of the capacitor C4 is connected to the other end of the resistor R4.

In this embodiment, the 4 interface and the 5 interface of the boost chip U3 are both connected to one end of the capacitor C4 and one end of the capacitor C5, and the other end of the capacitor C4 is connected to the other end of the capacitor C4.

The above description is only a further embodiment of the present invention, but the scope of protection of the present invention is not limited thereto, and any person skilled in the art can replace or change the technical solution and the concept of the present invention within the scope of the present invention.

Claims

1. The utility model provides a but 5V lithium titanate battery that extreme low temperature heavy current was filled and discharged which characterized in that: including lithium titanate battery, protection circuit and boost circuit and the shell that lithium titanate battery includes, discharge port plug and charge port plug are connected respectively to the one end of shell, protection circuit includes monitoring chip U1, monitoring chip U1's 2 interface connection resistance R2's one end, resistance R2's the other end connects the source electrode of first group field effect transistor respectively, and resistance R6's one end, the external output end T of the other end of resistance R6, the external output P of one end of resistance R6-, 1 wiring termination second group field effect transistor's base of monitoring chip U1, 3 wiring termination first group field effect transistor's of monitoring chip U1 base, 6 wiring termination second group field effect transistor's source electrode of monitoring chip U1, the drain electrode of second group field effect transistor with first group field effect transistor drain electrode is connected.

2. The lithium 5V titanate battery capable of extreme low-temperature high-current charge and discharge as claimed in claim 1, wherein: the 6 wiring end of the monitoring chip U1 is also connected with one end of a capacitor C1, the other end of the capacitor C1 is connected with one end of a resistor R1, the other end of the resistor R1 outputs a B + wiring end and a P + wiring end, and the 6 wiring end of the monitoring chip U1 outputs a B-wiring end.

3. The lithium 5V titanate battery capable of extreme low-temperature high-current charge and discharge as claimed in claim 2, wherein: the boost circuit includes boost chip U3, 1 termination inductance L1's of boost chip U3 one end, inductance L1's the external P + wiring end of other end, boost chip U3's 1 termination diode D1's positive pole, diode D1's negative pole output +5V power.

4. The lithium 5V titanate battery capable of extreme low-temperature high-current charge and discharge as claimed in claim 3, wherein: the terminal 2 of the boosting chip U3 is externally connected with one end of a capacitor C3 and one end of a capacitor C2 and is externally connected with a P-terminal, and the other end of the capacitor C2 and the other end of the capacitor C3 are connected with the other end of the inductor L1.

5. The lithium 5V titanate battery capable of extreme low-temperature high-current charge and discharge as claimed in claim 4, wherein: the boost chip U3's 3 wiring end external resistance R4's one end, the external P-wiring end of the other end of resistance R4, boost chip U3's 3 wiring end still connects resistance R5's one end, resistance R5's the external one end of electric capacity C4 of the other end, electric capacity C4's the other end with resistance R4's the other end is connected.

6. The lithium 5V titanate battery capable of extreme low-temperature high-current charge and discharge as claimed in claim 5, wherein: the 4 interface and the 5 interface of the boost chip U3 are both connected with one end of a capacitor C4 and one end of a capacitor C5, and the other end of the capacitor C4 is connected with the other end of the capacitor C4.