CN220491953U - Lithium battery - Google Patents

Abstract

The utility model provides a lithium battery which comprises a battery core, a data processing chip and a charging protector, wherein the charging protector is electrically connected with the battery core and the data processing chip and is used for controlling the on-off of a circuit for connecting the battery core and the data processing chip. The lithium battery internal state monitoring method and device can improve the technical problem that the data processing chip cannot monitor the internal state of the lithium battery stably due to insufficient electric quantity.

Description

Lithium battery

Technical Field

The utility model relates to the technical field of lithium batteries, in particular to a lithium battery.

Background

The lithium battery has the advantages of small volume, high energy density, long service life, environmental protection and the like, and is widely applied to industries such as automobiles, electronic products, energy storage systems and the like. In order to protect the safety of the lithium battery, the lithium battery cannot be overcharged or overdischarged in the use process, and meanwhile, internal state monitoring is required to be carried out for various physical environments of the lithium battery. In the related art, a data processing chip is generally adopted to receive data acquired by sensors such as temperature, pressure and the like, the data processing chip receives the data, processes the data and transmits the processed data to an external terminal, and the monitoring of the internal state of the lithium battery is realized.

The data processing chip and the battery cell are arranged in two modes at present, the first mode is that the data processing chip is connected with the battery cell in series, and the battery cell supplies power for the data processing chip, but in the mode, when the data processing chip is damaged, the anode and the cathode of the battery cell are directly communicated to cause short circuit; the second is that the cell does not supply power to the data processing chip, but in this way, when the power of the data processing chip is exhausted, the data processing chip cannot be charged effectively, so that the data processing chip cannot monitor the stability of the internal state of the lithium battery.

Disclosure of Invention

The embodiment of the utility model provides a lithium battery, which can solve the technical problem that a data processing chip cannot stably monitor the internal state of the lithium battery due to insufficient electric quantity.

An embodiment of the present utility model provides a lithium battery including:

a battery cell;

a data processing chip;

the charging protector is electrically connected with the battery cell and the data processing chip; and the circuit is used for controlling the on-off of a circuit connecting the battery cell and the data processing chip.

When the voltage of the data processing chip is smaller than a preset value, a circuit connecting the data processing chip and the battery cell in the charging protector is connected.

In one embodiment, the cell includes a first pole and a second pole;

the data processing chip comprises a first data pin and a second data pin;

the first pole is electrically connected with the first data pin, the second pole is electrically connected with the charging protector, and the second data pin is electrically connected with the charging protector.

In an embodiment, the charge protector includes:

a switching transistor electrically connected to the second post and the second data pin;

and the protection chip is electrically connected with the data processing chip.

In one embodiment, the switching transistor includes a source, a drain, and a gate;

the protection chip comprises a first protection pin, a second protection pin and a third protection pin;

wherein the second pillar is electrically connected to one of the source and the drain, and the second data pin is electrically connected to the other of the source and the drain;

the first protection pin is electrically connected with the first data pin, the second protection pin is electrically connected with the second data pin, and the third protection pin is electrically connected with the grid electrode.

In one embodiment, the switching transistor includes a source, a drain, and a gate;

the protection chip comprises a first protection pin, a second protection pin, a third protection pin and a fourth protection pin;

the second electrode pillar is electrically connected with one of the source electrode and the drain electrode, the first protection pin is electrically connected with the other of the source electrode and the drain electrode, the second protection pin is electrically connected with the second data pin, the third protection pin is electrically connected with the first data pin, and the fourth protection pin is electrically connected with the grid electrode.

In an embodiment, the first pole, the second pole and the data processing chip are all disposed at a first end of the electric core, and the first pole, the data processing chip and the second pole are disposed at intervals along a length direction of the first end.

In an embodiment, the lithium battery further comprises a pressure sensor, and the pressure sensor is arranged on the outer surface of the battery cell and is electrically connected with the data processing chip.

In one embodiment, the pressure sensor is disposed on one side of the cell;

the data processing chip comprises a third data pin, and the pressure sensor is electrically connected with the third data pin.

In an embodiment, the lithium battery further comprises a temperature sensor, and the temperature sensor is arranged on the outer surface of the battery cell and is electrically connected with the data processing chip.

In an embodiment, a temperature sensor is disposed in the battery cell and opposite to a second end surface on which the first pole, the second pole and the data processing chip are disposed;

the data processing chip comprises a fourth data pin, and the temperature sensor is electrically connected with the fourth data pin.

The embodiment of the utility model has the beneficial effects that:

in the embodiment of the utility model, the charging protector is electrically connected with the battery cell and the data processing chip, when the electric quantity of the data processing chip is sufficient, the voltage of the data processing chip is larger than a preset value, a circuit in the charging protector for connecting the data processing chip and the battery cell is disconnected, and the battery cell stops charging the data processing chip at the moment; when the electric quantity of the data processing chip is insufficient, the voltage of the data processing chip is smaller than a preset value, a circuit connecting the data processing chip and the battery cell in the charging protector is connected, and the battery cell starts to charge the data processing chip. By arranging the charging protector, the phenomenon that the battery cell is overcharged or damaged due to the fact that the battery cell is always charged to the data processing chip is avoided, and the service life of the battery cell is prolonged; meanwhile, when the electric quantity of the data processing chip is insufficient, the charging protector can charge the data processing chip through the electric core, so that the technical problem that the data processing chip cannot monitor the internal state of the lithium battery stably due to the insufficient electric quantity is solved.

Drawings

Fig. 1 is a schematic view of an embodiment of a lithium battery of the present utility model;

fig. 2 is a schematic view of the lithium battery shown in fig. 1 at another viewing angle;

FIG. 3 is an enlarged view at A in FIG. 2;

fig. 4 is a circuit diagram of the lithium battery shown in fig. 1;

fig. 5 is a schematic view of another embodiment of a lithium battery of the present utility model;

FIG. 6 is an enlarged view at B in FIG. 5;

fig. 7 is a circuit diagram of the lithium battery shown in fig. 5.

Detailed Description

Terms used in the specification and claims, unless defined otherwise, have meanings that correspond to commonly understood meanings by one of ordinary skill in the art to which the present application pertains. The terms used in the specification and claims are used for descriptive and understanding purposes only and are not intended to limit the application to the narrow interpretation of the specific terms used in the specification and claims.

Referring to fig. 1 to 7, an embodiment of the present utility model provides a lithium battery 100 including:

a cell 10; a data processing chip 20; and the charging protector 30 is electrically connected with the battery cell 10 and the data processing chip 20, and is used for controlling the on-off of a circuit connecting the battery cell 10 and the data processing chip 20.

When the voltage of the data processing chip 20 is greater than a preset value, a circuit connecting the data processing chip 20 and the battery cell 10 in the charge protector 30 is disconnected; when the voltage of the data processing chip 20 is smaller than a preset value, a circuit connecting the data processing chip 20 and the battery cell 10 in the charge protector 30 is turned on.

In the embodiment of the present utility model, the charging protector 30 is electrically connected with the battery cell 10 and the data processing chip 20, when the electric quantity of the data processing chip 20 is sufficient, the voltage of the data processing chip 20 is greater than a preset value, the circuit in the charging protector 30 connecting the data processing chip 20 and the battery cell 10 is disconnected, and at this time, the battery cell 10 stops charging the data processing chip 20; when the electric quantity of the data processing chip 20 is insufficient, the voltage of the data processing chip 20 is smaller than a preset value, a circuit connecting the data processing chip 20 and the battery cell 10 in the charging protector 30 is connected, and the battery cell 10 starts to charge the data processing chip 20. By arranging the charging protector 30, the phenomenon that the battery cell 10 is overcharged or the battery cell 10 is short-circuited due to the fact that the battery cell 10 charges the data processing chip 20 all the time or the data processing chip 20 is damaged is avoided, and the service life of the battery cell 10 is prolonged; meanwhile, when the electric quantity of the data processing chip 20 is insufficient, the charging protector 30 can charge the data processing chip 20 through the battery cell 10, so that the technical problem that the internal state of the lithium battery 100 cannot be stably monitored due to the insufficient electric quantity of the data processing chip 20 is solved.

In the process of charging the data processing chip 20, the voltage preset value of the data processing chip 20 refers to the rated voltage and full-charge voltage setting of the data processing chip 20, the rated voltage of the data processing chip 20 is 3.7V, the overcharge protection voltage is 4.2+/-0.05V, and the voltage preset value of the data processing chip 20 is in the range of 3.7V-4.25V;

in the discharging process of the data processing chip 20, the voltage preset value of the data processing chip 20 is set with reference to the rated discharge voltage of the data processing chip 20, the over-discharge protection voltage of the data processing chip 20 is 2.3V, and the voltage preset value of the data processing chip 20 is in the range of 2.3V-2.4V.

The data processing chip 20 is used for receiving data collected by other sensors in the battery cell 10 and transmitting the collected data to an external terminal.

The lithium battery 100 further comprises a display panel, the display panel is arranged outside the lithium battery 100, the data processing chip 20 is electrically or wirelessly connected with the display panel, the data processing chip 20 transmits collected data to the display panel, and the display panel receives the data collected by the data processing chip 20 and displays the data on a screen so as to intuitively monitor the internal pressure and temperature information of the lithium battery 100, and the safety performance of the lithium battery 100 is improved.

Referring to fig. 1 to 7, in an embodiment, the battery cell 10 includes a first pole 11 and a second pole 12; the data processing chip 20 includes a first data pin and a second data pin; the first pole 11 is electrically connected to the first data pin, the second pole 12 is electrically connected to the charge protector 30, and the second data pin is electrically connected to the charge protector 30.

In an embodiment, the first pole 11 is one of the positive electrode and the negative electrode of the battery cell 10, and the second pole 12 is the other of the positive electrode and the negative electrode of the battery cell 10. When the second data pin of the data processing chip 20 is electrically connected with the charge protector 30, the first data pin of the data processing chip 20 is electrically connected with one of the positive electrode and the negative electrode of the battery cell 10. When the voltage of the data processing chip 20 is greater than a preset value, a circuit in the charge protector 30 connecting the second pole 12 and the second data pin is disconnected; when the voltage of the data processing chip 20 is less than the preset value, a circuit connecting the second pole 12 and the second data pin in the charge protector 30 is turned on. When the data processing chip 20 has insufficient electric quantity, the charging protector 30 can charge the data processing chip 20 through the battery cell 10, so that the technical problem that the data processing chip 20 cannot stably monitor the internal state of the lithium battery 100 due to insufficient electric quantity is solved.

Referring to fig. 1 to 7, in an embodiment, the charge protector 30 includes:

a switching transistor 31, the switching transistor 31 being electrically connected to the second post 12 and the second data pin; a protection chip 32, the protection chip 32 being electrically connected to the data processing chip 20.

When the voltage of the data processing chip 20 is greater than a preset value, the switching transistor 31 is in an off state; when the voltage of the data processing chip 20 is smaller than a preset value, the switching transistor 31 is in an on state.

In an embodiment, the switching transistor 31 is one of a Field Effect Transistor (FET), a Junction Field Effect Transistor (JFET), an N-channel JFET, a P-channel JFET, a Metal Oxide Semiconductor Field Effect Transistor (MOSFET), an N-channel MOSFET, a P-channel MOSFET, a small signal transistor, a small switching transistor 31, a power transistor, a high frequency transistor, a phototransistor, and a single transistor (UJT). The protection chip 32 is used for monitoring the voltage instantaneous value of the data processing chip 20, when the voltage instantaneous value of the data processing chip 20 is larger than a preset value, the switch transistor 31 is in an off state, and when the voltage instantaneous value of the data processing chip 20 is smaller than the preset value, the switch transistor 31 is in an on state.

The protection chip 32 is electrically connected with the switching transistor 31 and is used for controlling the switching transistor 31 to be turned on or turned off; alternatively, the protection chip 32 is a wireless transceiver chip, and controls the switching transistor 31 to be turned on or off by wireless transmission and reception.

Referring to fig. 1 to 4, in an embodiment, the switching transistor 31 includes a source, a drain, and a gate;

the protection chip 32 includes a first protection pin, a second protection pin, and a third protection pin;

wherein the second pillar 12 is electrically connected to one of the source and the drain, and the second data pin is electrically connected to the other of the source and the drain;

the first protection pin is electrically connected with the first data pin, the second protection pin is electrically connected with the second data pin, and the third protection pin is electrically connected with the grid electrode.

In the technical scheme of an embodiment, the switch transistor 31 is an NMOS transistor, and the model of the protection chip 32 is DW01; the second post 12 is electrically connected to one of the source and drain of the NMOS transistor, and the second data pin is electrically connected to the other of the source and drain of the NMOS transistor. The first protection pin and the second protection pin of the protection chip 32 are respectively electrically connected with the first data pin and the second data pin of the data processing chip 20, and are used for monitoring the voltage instantaneous value of the data processing chip 20; the third protection pin of the protection chip 32 is electrically connected to the gate of the NMOS transistor, and is used for controlling the NMOS transistor to be turned on or off.

At this time, the NMOS is connected in series between the battery cell 10 and the data processing chip 20, and when the voltage of the data processing chip 20 is smaller than a preset value, the NMOS is in an open state, a circuit between the battery cell 10 and the data processing chip 20 is turned on, and the battery cell 10 charges the data processing chip 20; when the voltage of the data processing chip 20 is greater than the preset value, the NMOS transistor is in the off state, the circuit between the battery cell 10 and the data processing chip 20 is disconnected, and the battery cell 10 stops charging the data processing chip 20.

Referring to fig. 5 to 7, in one embodiment, the switching transistor 31 includes a source, a drain, and a gate; the protection chip 32 includes a first protection pin, a second protection pin, a third protection pin, and a fourth protection pin; wherein the second pillar 12 is electrically connected to one of the source and the drain, the first guard pin is electrically connected to the other of the source and the drain, the second guard pin is electrically connected to the second data pin, the third guard pin is electrically connected to the first data pin, and the fourth guard pin is electrically connected to the gate.

In the technical scheme of an embodiment, the switch transistor 31 is an NMOS transistor, and the model of the protection chip 32 is DW01; the second pillar 12 is electrically connected to one of the source and the drain of the NMOS transistor, and the first guard pin is electrically connected to the other of the source and the drain of the NMOS transistor. The second protection pin and the third protection pin of the protection chip 32 are respectively electrically connected with the second data pin and the first data pin of the data processing chip 20, and are used for monitoring the voltage instantaneous value of the data processing chip 20; the fourth protection pin of the protection chip 32 is electrically connected to the gate of the NMOS transistor, and is used for controlling the NMOS transistor to be turned on or off.

At this time, the NMOS transistor and the protection chip 32 are connected in series between the battery cell 10 and the data processing chip 20, and when the voltage of the data processing chip 20 is smaller than a preset value, the NMOS transistor is in an open state, a circuit between the battery cell 10 and the data processing chip 20 is turned on, and the battery cell 10 charges the data processing chip 20; when the voltage of the data processing chip 20 is greater than the preset value, the NMOS transistor is in the off state, the circuit between the battery cell 10 and the data processing chip 20 is disconnected, and the battery cell 10 stops charging the data processing chip 20.

Referring to fig. 1 and 2, in an embodiment, the first pole 11, the second pole 12 and the data processing chip 20 are all disposed at a first end of the battery cell 10, and the first pole 11, the data processing chip 20 and the second pole 12 are disposed at intervals along a length direction of the first end.

In the technical solution of an embodiment, the first terminal 11, the second terminal 12 and the data processing chip 20 are all disposed at the first end of the battery cell 10, so that the internal wiring of the lithium battery 100 can be facilitated, and the production efficiency of the lithium battery 100 is improved.

Referring to fig. 1 and 2, in an embodiment, the lithium battery 100 further includes a pressure sensor 40, and the pressure sensor 40 is disposed on the outer surface of the battery cell 10 and is electrically connected to the data processing chip 20.

In the technical solution of an embodiment, the pressure sensor 40 is one of a strain type pressure sensor 40, a piezoresistive type pressure sensor 40, a capacitive type pressure sensor 40 and a piezoelectric type pressure sensor 40, when the pressure sensor 40 is the strain type pressure sensor 40, the strain type pressure sensor 40 includes an elastomer and a strain gauge, the elastomer is arranged at a position where the outer surface of the battery cell 10 expands and deforms, the strain gauge is attached to the elastomer, when the elastomer deforms due to expansion of the battery cell 10, the strain gauge converts the deformation of the elastomer into a resistance signal, the data processing chip 20 is electrically connected with the strain gauge, and the data processing chip 20 acquires the deformation amount of the battery cell 10 by collecting the resistance data of the strain gauge, so that the design of the pressure sensor 40 improves the safety performance of the lithium battery 100.

Referring to fig. 1 and 2, in one embodiment, the pressure sensor 40 is disposed on one side of the battery cell 10; the data processing chip 20 includes a third data pin, and the pressure sensor 40 is electrically connected to the third data pin.

In the technical solution of an embodiment, the types of the battery cells 10 include a winding type battery cell 10 and a lamination type battery cell 10, and when the battery cell 10 is the winding type battery cell 10, the pressure sensor 40 is arranged on the side surface of the winding type battery cell 10; when the battery cell 10 is a laminated battery cell 10, the pressure sensor 40 is disposed on a side surface of the laminated battery cell 10 in the lamination direction.

Referring to fig. 1 and 2, in an embodiment, the lithium battery 100 further includes a temperature sensor 50, and the temperature sensor 50 is disposed on the outer surface of the battery cell 10 and electrically connected to the data processing chip 20.

In one embodiment, the temperature sensor 50 is one of a thermistor, thermocouple, resistance Temperature Detector (RTD), analog thermometer chip, digital thermometer chip, silicon diode, and infrared radiator. When the pressure sensor 40 is a thermistor, the thermistor is arranged on the outer surface of the battery cell 10, and the data processing chip 20 acquires the surface temperature of the battery cell 10 by collecting the resistance data of the thermistor, so that the safety performance of the lithium battery 100 is improved by the arrangement of the temperature sensor 50.

Referring to fig. 1 and 2, in an embodiment, a temperature sensor 50 is disposed in the battery cell 10 at a second end surface opposite to the first end surface where the first pole 11, the second pole 12 and the data processing chip 20 are disposed; the data processing chip 20 includes a fourth data pin, and the temperature sensor 50 is electrically connected to the fourth data pin.

In an embodiment, the temperature sensor 50 is disposed on the second end surface, and is used for monitoring the instantaneous temperature value of the portion of the battery cell 10 away from the first end surface, so as to ensure the safety performance of the lithium battery 100.

The foregoing has outlined rather broadly the more detailed description of embodiments of the utility model, wherein the principles and embodiments of the utility model are explained in detail using specific examples, the above examples being provided solely to facilitate the understanding of the method and core concepts of the utility model; meanwhile, as those skilled in the art will have variations in the specific embodiments and application scope in light of the ideas of the present utility model, the present description should not be construed as limiting the present utility model.

Claims (10)

1. A lithium battery, comprising:

a battery cell;

a data processing chip;

and the charging protector is electrically connected with the battery cell and the data processing chip and used for controlling the on-off of a circuit connecting the battery cell and the data processing chip.

2. The lithium battery of claim 1, wherein the cell comprises a first post and a second post;

the data processing chip comprises a first data pin and a second data pin;

the first pole is electrically connected with the first data pin, the second pole is electrically connected with the charging protector, and the second data pin is electrically connected with the charging protector.

3. The lithium battery of claim 2, wherein the charge protector comprises:

a switching transistor electrically connected to the second post and the second data pin;

and the protection chip is electrically connected with the data processing chip.

4. The lithium battery of claim 3, wherein the switching transistor comprises a source, a drain, and a gate;

the protection chip comprises a first protection pin, a second protection pin and a third protection pin;

wherein the second pillar is electrically connected to one of the source and the drain, and the second data pin is electrically connected to the other of the source and the drain;

the first protection pin is electrically connected with the first data pin, the second protection pin is electrically connected with the second data pin, and the third protection pin is electrically connected with the grid electrode.

5. The lithium battery of claim 3, wherein the switching transistor comprises a source, a drain, and a gate;

the protection chip comprises a first protection pin, a second protection pin, a third protection pin and a fourth protection pin;

the second electrode pillar is electrically connected with one of the source electrode and the drain electrode, the first protection pin is electrically connected with the other of the source electrode and the drain electrode, the second protection pin is electrically connected with the second data pin, the third protection pin is electrically connected with the first data pin, and the fourth protection pin is electrically connected with the grid electrode.

6. The lithium battery of claim 2, wherein the first post, the second post, and the data processing chip are all disposed at a first end of the electrical core, and the first post, the data processing chip, and the second post are disposed at intervals along a length direction of the first end.

7. The lithium battery of claim 2, further comprising a pressure sensor disposed on an outer surface of the cell and electrically connected to the data processing chip.

8. The lithium battery of claim 7, wherein the pressure sensor is disposed on one side of the cell;

the data processing chip comprises a third data pin, and the pressure sensor is electrically connected with the third data pin.

9. The lithium battery of claim 2, further comprising a temperature sensor disposed on an outer surface of the cell and electrically connected to the data processing chip.

10. The lithium battery according to claim 9, wherein a temperature sensor is arranged in the battery cell and on a second end face opposite to the first end face provided with the first pole, the second pole and the data processing chip;

the data processing chip comprises a fourth data pin, and the temperature sensor is electrically connected with the fourth data pin.