CN220491953U - lithium battery - Google Patents

Abstract

The utility model provides a lithium battery, which includes a battery core, a data processing chip and a charging protector. The charging protector is electrically connected to the battery core and the data processing chip, and is used to control the on and off of the circuit connecting the battery core and the data processing chip. This application can improve the technical problem that the data processing chip cannot stably monitor the internal state of the lithium battery due to insufficient power.

Description

lithium battery

Technical field

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

Background technique

Lithium batteries have the advantages of small size, high energy density, long service life, and green environmental protection. They are widely used in industries such as automobiles, electronic products, and energy storage systems. In order to protect the safety of lithium batteries, lithium batteries cannot be overcharged or overdischarged during use. At the same time, the internal status of the various physical environments of lithium batteries needs to be monitored. In related technologies, a data processing chip is usually used to receive data collected by sensors such as temperature and pressure. The data processed by the data processing chip is then transmitted to an external terminal to monitor the internal status of the lithium battery.

There are currently two ways to set up the data processing chip and the battery core. The first is that the data processing chip and the battery core are connected in series, and the battery core supplies power to the data processing chip. However, in this way, when the data processing chip is damaged, the battery core will be damaged. The positive and negative electrodes will be directly connected to cause a short circuit; the second is that the battery core does not supply power to the data processing chip. However, in this way, when the data processing chip is exhausted, it cannot be effectively charged, causing the data processing chip to be unable to process the internal power of the lithium battery. Status monitoring for stability.

Utility model content

The embodiment of the present invention provides a lithium battery, which can improve the technical problem that the data processing chip cannot stably monitor the internal state of the lithium battery due to insufficient power.

An embodiment of the present invention provides a lithium battery, including:

Batteries;

data processing chip;

A charging protector, the charging protector is electrically connected to the battery core and the data processing chip; used to control the on and off of the circuit connecting the battery core and the data processing chip.

When the voltage of the data processing chip is less than the preset value, the circuit connecting the data processing chip and the battery core in the charging protector is turned on.

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

The data processing chip includes a first data pin and a second data pin;

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

In one embodiment, the charging protector includes:

a switching transistor, the switching transistor is electrically connected to the second pole and the second data pin;

Protection chip, the protection chip is electrically connected to the data processing chip.

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

The protection chip includes a first protection pin, a second protection pin and a third protection pin;

Wherein, the second pole is electrically connected to one of the source electrode and the drain electrode, and the second data pin is electrically connected to the other of the source electrode and the drain electrode. connect;

The first protection pin is electrically connected to the first data pin, the second protection pin is electrically connected to the second data pin, and the third protection pin is electrically connected to the gate. .

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

The protection chip includes a first protection pin, a second protection pin, a third protection pin and a fourth protection pin;

Wherein, the second pole is electrically connected to one of the source electrode and the drain electrode, and the first protection pin is electrically connected to the other of the source electrode and the drain electrode. connection, the second protection pin is electrically connected to the second data pin, the third protection pin is electrically connected to the first data pin, the fourth protection pin is electrically connected to the gate Electrical connection.

In one embodiment, the first pole, the second pole and the data processing chip are all located at the first end of the battery core, and the first pole, the data processing chip and The second poles are spaced apart along the length direction of the first end.

In one embodiment, the lithium battery further includes a pressure sensor. The pressure sensor is provided on the outer surface of the battery core and is electrically connected to the data processing chip.

In one embodiment, the pressure sensor is provided on one side of the battery core;

The data processing chip includes a third data pin, and the pressure sensor is electrically connected to the third data pin.

In one embodiment, the lithium battery further includes a temperature sensor. The temperature sensor is provided on the outer surface of the battery core and is electrically connected to the data processing chip.

In one embodiment, a temperature sensor is provided on a second end face of the battery core facing away from the first end face where the first pole, the second pole and the data processing chip are provided;

The data processing chip includes a fourth data pin, and the temperature sensor is electrically connected to the fourth data pin.

Beneficial effects of embodiments of the present utility model:

In the embodiment of the present invention, the charging protector is electrically connected to the battery core and the data processing chip. When the data processing chip has sufficient power and the voltage of the data processing chip is greater than the preset value, the charging protector is connected to the data processing chip and the data processing chip. The circuit of the core is disconnected, and the battery core stops charging the data processing chip at this time; when the data processing chip is low in power, the voltage of the data processing chip is less than the preset value, and the circuit connection connecting the data processing chip and the battery core in the charging protector At this time, the battery cell starts to charge the data processing chip. By setting a charging protector, the battery core is prevented from constantly charging the data processing chip, resulting in overcharging or the battery core being short-circuited due to damage to the data processing chip, thereby extending the service life of the battery core; at the same time, when the data processing chip is insufficiently charged, the charging protection The device can charge the data processing chip through the battery core, which improves the technical problem that the data processing chip cannot stably monitor the internal state of the lithium battery due to insufficient power.

Description of the drawings

Figure 1 is a schematic diagram of an embodiment of the lithium battery of the present invention;

Figure 2 is a schematic diagram of the lithium battery shown in Figure 1 from another perspective;

Figure 3 is an enlarged view of point A in Figure 2;

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

Figure 5 is a schematic diagram of another embodiment of the lithium battery of the present invention;

Figure 6 is an enlarged view of B in Figure 5;

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

Detailed ways

Unless otherwise defined, the terms used in this specification and claims have meanings corresponding to those commonly understood by those of ordinary skill in the art to which this application belongs. The terms used in the description and claims are only for the purpose of facilitating the description and understanding of the present application, and are not intended to limit the application to a narrow interpretation of the specific terms used in the description and claims.

Referring to Figures 1 to 7, an embodiment of the present invention provides a lithium battery 100, including:

Battery core 10; data processing chip 20; charging protector 30. The charging protector 30 is electrically connected to the battery core 10 and the data processing chip 20, and is used to control the connection between the battery core 10 and the data processing chip. The circuit of chip 20 is switched on and off.

When the voltage of the data processing chip 20 is greater than the preset value, the circuit connecting the data processing chip 20 and the battery core 10 in the charging protector 30 is disconnected; when the voltage of the data processing chip 20 is less than At the preset value, the circuit connecting the data processing chip 20 and the battery core 10 in the charging protector 30 is turned on.

In the embodiment of the present invention, the charging protector 30 is electrically connected to the battery core 10 and the data processing chip 20. When the data processing chip 20 has sufficient power and the voltage of the data processing chip 20 is greater than the preset value, the charging protector 30 The circuit connecting the data processing chip 20 and the battery core 10 is disconnected, and the battery core 10 stops charging the data processing chip 20 at this time; when the data processing chip 20 is insufficiently powered, the voltage of the data processing chip 20 is less than the preset value, and the charging protection The circuit connecting the data processing chip 20 and the battery core 10 in the device 30 is connected. At this time, the battery core 10 starts to charge the data processing chip 20. By setting the charging protector 30, the battery core 10 is prevented from constantly charging the data processing chip 20, resulting in overcharging or the battery core 10 being short-circuited due to damage to the data processing chip 20, thereby extending the service life of the battery core 10; at the same time, when the data processing chip When the battery 20 is insufficient, the charging protector 30 can charge the data processing chip 20 through the battery core 10, which improves the technical problem that the data processing chip 20 cannot stably monitor the internal state of the lithium battery 100 due to insufficient battery.

During the charging process of the data processing chip 20, the voltage preset value of the data processing chip 20 is set with reference to the rated voltage and full power voltage of the data processing chip 20. For example, the rated voltage of the data processing chip 20 is 3.7V, and the overcharge protection voltage is is 4.2±0.05V, and the preset voltage value of the data processing chip 20 is in the range of 3.7V-4.25V;

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

The data processing chip 20 is used to receive data collected by other sensors inside the battery core 10 and transmit the collected data to an external terminal.

The lithium battery 100 also includes a display panel. The display panel is arranged outside the lithium battery 100. The data processing chip 20 is electrically or wirelessly connected to the display panel. The data processing chip 20 transmits the collected data to the display panel, and the display panel receives the data. The data collected by the processing chip 20 is displayed on the screen to visually monitor the internal pressure and temperature information of the lithium battery 100, thereby improving the safety performance of the lithium battery 100.

Referring to Figures 1 to 7, in one embodiment, the battery core 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 charging protector 30 , and the second data pin is electrically connected to the charging protector 30 . connect.

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

Referring to Figures 1 to 7, in one embodiment, the charging protector 30 includes:

A switching transistor 31 is electrically connected to the second pole 12 and the second data pin; a protection chip 32 is electrically connected to the data processing chip 20 .

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

In the technical solution of an embodiment, the switching transistor 31 is 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), or an N-channel JFET. One of channel MOSFET, P-channel MOSFET, small-signal transistor, small switching transistor 31, power transistor, high-frequency transistor, phototransistor, and unijunction transistor (UJT). The protection chip 32 is used to monitor the instantaneous voltage value of the data processing chip 20. When the instantaneous voltage value of the data processing chip 20 is greater than the preset value, the switching transistor 31 is in a closed state. When the instantaneous voltage value of the data processing chip 20 is less than the preset value , the switching transistor 31 is in the open state.

The protection chip 32 is electrically connected to the switching transistor 31 and is used to control the switching transistor 31 to turn on or off; alternatively, the protection chip 32 is a wireless transceiver chip and controls the switching transistor 31 to turn on or off through wireless transceiver.

Referring to Figures 1 to 4, 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 and a third protection pin;

Wherein, the second pole 12 is electrically connected to one of the source electrode and the drain electrode, and the second data pin is electrically connected to the other of the source electrode and the drain electrode. electrical connection;

The first protection pin is electrically connected to the first data pin, the second protection pin is electrically connected to the second data pin, and the third protection pin is electrically connected to the gate. .

In the technical solution of an embodiment, the switching transistor 31 is an NMOS tube, and the model of the protection chip 32 is DW01; the second pole 12 is electrically connected to one of the source and drain of the NMOS tube, and the second data pin The pin is electrically connected to the other of the source and drain of the NMOS tube. The first protection pin and the second protection pin of the protection chip 32 are electrically connected to the first data pin and the second data pin of the data processing chip 20 respectively, and are used to monitor the instantaneous voltage value of the data processing chip 20; protection chip The third protection pin of 32 is electrically connected to the gate of the NMOS tube and is used to control the NMOS tube to turn on or off.

At this time, the NMOS tube is connected in series between the battery core 10 and the data processing chip 20. When the voltage of the data processing chip 20 is less than the preset value, the NMOS tube is in an open state, and the circuit between the battery core 10 and the data processing chip 20 is connected. , the battery core 10 charges the data processing chip 20; when the voltage of the data processing chip 20 is greater than the preset value, the NMOS tube is in a closed state, the circuit between the battery core 10 and the data processing chip 20 is disconnected, and the battery core 10 stops The data processing chip 20 is charged.

Referring to FIGS. 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, and a third protection pin. and a fourth protection pin; wherein the second pole 12 is electrically connected to one of the source and the drain, and the first protection pin is connected to the source and the drain. The other of the two drain electrodes is electrically connected, the second protection pin is electrically connected to the second data pin, the third protection pin is electrically connected to the first data pin, and the third protection pin is electrically connected to the first data pin. Four protection pins are electrically connected to the gate.

In the technical solution of an embodiment, the switching transistor 31 is an NMOS tube, and the model of the protection chip 32 is DW01; the second pole 12 is electrically connected to one of the source and drain of the NMOS tube, and the first protection lead The pin is electrically connected to the other of the source and drain of the NMOS tube. The second protection pin and the third protection pin of the protection chip 32 are electrically connected to the second data pin and the first data pin of the data processing chip 20 respectively, and are used to monitor the instantaneous voltage value of the data processing chip 20; protection chip The fourth protection pin of 32 is electrically connected to the gate of the NMOS tube and is used to control the NMOS tube to turn on or off.

At this time, the NMOS tube and the protection chip 32 are connected in series between the battery core 10 and the data processing chip 20. When the voltage of the data processing chip 20 is less than the preset value, the NMOS tube is in an open state, and the gap between the battery core 10 and the data processing chip 20 is The circuit is connected, and the battery core 10 charges the data processing chip 20; when the voltage of the data processing chip 20 is greater than the preset value, the NMOS tube is in a closed state, and the circuit between the battery core 10 and the data processing chip 20 is disconnected. The battery core 10 stops charging the data processing chip 20 .

Referring to FIGS. 1 and 2 , in one embodiment, the first pole 11 , the second pole 12 and the data processing chip 20 are all disposed at the first end of the battery core 10 . The first pole 11 , the data processing chip 20 and the second pole 12 are spaced apart along the length direction of the first end.

In the technical solution of one embodiment, the first pole 11 , the second pole 12 and the data processing chip 20 are all located at the first end of the battery cell 10 , which facilitates the internal wiring of the lithium battery 100 and improves the production of the lithium battery 100 efficiency.

Referring to Figures 1 and 2, in one embodiment, the lithium battery 100 further includes a pressure sensor 40. The pressure sensor 40 is provided on the outer surface of the battery core 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 gauge pressure sensor 40, a piezoresistive pressure sensor 40, a capacitive pressure sensor 40, and a piezoelectric pressure sensor 40. When the pressure sensor 40 is a strain gauge pressure sensor, When the pressure sensor 40 is used, the strain-type pressure sensor 40 includes an elastic body and a strain gauge. The elastic body is disposed at a position where the outer surface of the battery core 10 expands and deforms. The strain gauge is attached to the elastic body. When the elastic body expands due to the expansion of the battery core 10 When deformation occurs, the strain gauge converts the deformation of the elastomer into a resistance signal. The data processing chip 20 is electrically connected to the strain gauge. The data processing chip 20 acquires the deformation amount of the battery core 10 by collecting the resistance data of the strain gauge. The pressure sensor 40 The design improves the safety performance of lithium battery 100.

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

In the technical solution of an embodiment, the types of the battery core 10 include a wound battery core 10 and a laminated battery core 10. When the battery core 10 is a wound battery core 10, the pressure sensor 40 is provided on the wound battery core 10. The side of the battery core 10; when the battery core 10 is a laminated battery core 10, the pressure sensor 40 is disposed on the side of the laminated battery core 10 in the stacking direction.

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

In the technical solution of an embodiment, the temperature sensor 50 is one of a thermistor, a thermocouple, a resistance temperature detector (RTD), an analog thermometer chip, a digital thermometer chip, a silicon diode, and an infrared radiator. When the pressure sensor 40 is a thermistor, the thermistor is disposed on the outer surface of the battery core 10 , and the data processing chip 20 acquires the surface temperature of the battery core 10 by collecting the resistance data of the thermistor. The setting of the temperature sensor 50 improves Improve the safety performance of lithium battery 100.

Referring to FIGS. 1 and 2 , in one embodiment, the battery core 10 is facing away from the first end surface where the first pole 11 , the second pole 12 and the data processing chip 20 are provided. A temperature sensor 50 is provided on the second end surface of the chip; the data processing chip 20 includes a fourth data pin, and the temperature sensor 50 is electrically connected to the fourth data pin.

In the technical solution of one embodiment, the temperature sensor 50 is disposed on the second end face for monitoring the instantaneous temperature value of the portion of the battery cell 10 away from the first end face to ensure the safety performance of the lithium battery 100 .

The embodiments of the present utility model have been introduced in detail above. Specific examples are used in this article to illustrate the principles and implementation methods of the present utility model. The description of the above embodiments is only used to help understand the method of the present utility model and its core idea; At the same time, for those skilled in the art, there will be changes in the specific implementation and application scope based on the ideas of the present utility model. In summary, the content of this description should not be understood as a limitation of the present utility model.

Claims (10)

1. A lithium battery, characterized by comprising: Batteries; data processing chip; A charging protector, the charging protector is electrically connected to the battery core and the data processing chip, and is used to control the switching on and off of the circuit connecting the battery core and the data processing chip. 2. The lithium battery according to claim 1, wherein the battery core includes a first pole and a second pole; The data processing chip includes a first data pin and a second data pin; The first pole is electrically connected to the first data pin, the second pole is electrically connected to the charging protector, and the second data pin is electrically connected to the charging protector. 3. The lithium battery according to claim 2, wherein the charging protector includes: a switching transistor, the switching transistor is electrically connected to the second pole and the second data pin; Protection chip, the protection chip is electrically connected to the data processing chip. 4. The lithium battery according to claim 3, wherein the switching transistor includes a source, a drain and a gate; The protection chip includes a first protection pin, a second protection pin and a third protection pin; Wherein, the second pole is electrically connected to one of the source electrode and the drain electrode, and the second data pin is electrically connected to the other of the source electrode and the drain electrode. connect; The first protection pin is electrically connected to the first data pin, the second protection pin is electrically connected to the second data pin, and the third protection pin is electrically connected to the gate. . 5. The lithium battery according to claim 3, wherein the switching transistor includes a source, a drain and a gate; The protection chip includes a first protection pin, a second protection pin, a third protection pin and a fourth protection pin; Wherein, the second pole is electrically connected to one of the source electrode and the drain electrode, and the first protection pin is electrically connected to the other of the source electrode and the drain electrode. connection, the second protection pin is electrically connected to the second data pin, the third protection pin is electrically connected to the first data pin, the fourth protection pin is electrically connected to the gate Electrical connection. 6. The lithium battery according to claim 2, wherein the first pole, the second pole and the data processing chip are all disposed at the first end of the battery core, and the third pole A pole, the data processing chip and the second pole are spaced apart along the length direction of the first end. 7. The lithium battery according to claim 2, characterized in that the lithium battery further includes a pressure sensor, the pressure sensor is provided on the outer surface of the battery core and is electrically connected to the data processing chip. 8. The lithium battery according to claim 7, wherein the pressure sensor is located on one side of the battery core; The data processing chip includes a third data pin, and the pressure sensor is electrically connected to the third data pin. 9. The lithium battery according to claim 2, characterized in that the lithium battery further includes a temperature sensor, the temperature sensor is provided on the outer surface of the battery core and is electrically connected to the data processing chip. 10. The lithium battery according to claim 9, characterized in that, in the battery core, the first end face of the battery core is facing away from the first end surface where the first pole, the second pole and the data processing chip are provided. The second end face is provided with a temperature sensor; The data processing chip includes a fourth data pin, and the temperature sensor is electrically connected to the fourth data pin.