WO2023197848A1

WO2023197848A1 - Battery and battery charging method

Info

Publication number: WO2023197848A1
Application number: PCT/CN2023/083614
Authority: WO
Inventors: 秦威
Original assignee: 深圳市道通智能航空技术股份有限公司
Priority date: 2022-04-15
Filing date: 2023-03-24
Publication date: 2023-10-19
Also published as: CN114824525A

Abstract

Embodiments of the present invention disclose a battery and a battery charging method. The battery comprises a battery cell and a battery control module. The battery control module is configured to: periodically obtain the temperature of the battery cell in a charging process; when the temperature of the battery cell is smaller than a preset first temperature threshold, control the battery cell to stop charging, and heat the battery cell; and after heating is performed and when the temperature of the battery cell is greater than or equal to the first temperature threshold, control the battery cell to start charging. According to the battery and the battery charging method disclosed in the embodiments of the present invention, the problems of a long charging duration and poor user experience caused by limiting voltage or current during low-temperature charging of the battery can be avoided, and the problem of cooling over time after the battery cell is heated can be prevented.

Description

A kind of battery and battery charging method

This application claims priority to the Chinese patent application filed with the China Patent Office on April 15, 2022, with the application number CN2022104147438 and the application title "A battery and a battery charging method", the entire content of which is incorporated into this application by reference. .

Technical field

The present invention relates to but is not limited to charging and discharging technology, and in particular, refers to a battery and a battery charging method.

Background technique

Limited by the development of battery technology, low-temperature charging of batteries has always been a difficult problem to solve. Especially for lithium batteries, charging at low temperatures will pose safety risks.

The current conventional low-temperature charging strategies can be by adjusting the charging current or voltage, or directly turning off charging at low temperatures. When the battery is charged at low temperature, if the voltage or current is lowered, the charging time will be longer and the user experience will be worse.

Contents of the invention

Embodiments of the present application provide a battery, including: a battery cell and a battery control module;

The battery control module is used to periodically obtain the temperature of the battery core during the charging process, and when the temperature of the battery core is less than a preset first temperature threshold, control the battery core to stop charging and charge the battery. The battery core is heated; after heating and the temperature of the battery core is greater than or equal to the first temperature threshold, the battery core is controlled to start charging.

Embodiments of the present application also provide a battery charging method, including:

Periodically obtain the temperature of the battery core during the charging process;

When the temperature of the battery core is less than the preset first temperature threshold, control the battery core to stop charging and heat the battery core;

After heating and when the temperature of the battery core is greater than or equal to the first temperature threshold, the battery core is controlled to start charging.

Compared with the existing technology, the battery and battery charging method provided by at least one embodiment of the present application have the following beneficial effects: During the normal charging process, the temperature of the battery core is continuously detected, and the low-temperature battery is heated first and then the battery is charged. Charging, the battery can be charged normally without limiting the charging current or voltage. This avoids the problem of longer charging time and poor user experience when the battery is charged at low temperature by limiting the voltage or current. In addition, continuously detecting the temperature of the battery core during normal charging can prevent the problem that the battery core will cool down over time after heating.

Additional features and advantages of the application will be set forth in the description which follows, and in part will be apparent from the description, or may be learned by practice of the application. Other advantages of the application can be realized and obtained by the solutions described in the specification and drawings.

Description of the drawings

The drawings are used to provide an understanding of the technical solution of the present application and constitute a part of the specification. They are used to explain the technical solution of the present application together with the embodiments of the present application and do not constitute a limitation of the technical solution of the present application.

Figure 1 is a structural block diagram of a battery provided by an exemplary embodiment of the present invention;

Figure 2 is a structural block diagram of a battery provided by another exemplary embodiment of the present invention;

Figure 3 is a circuit schematic diagram of a charging detection module provided by an exemplary embodiment of the present invention;

Figure 4 is a flow chart of a battery charging method provided by an exemplary embodiment of the present invention;

Figure 5 is a flow chart of a battery charging method provided by another exemplary embodiment of the present invention.

Detailed ways

This application describes multiple embodiments, but the description is illustrative rather than restrictive, and it is obvious to those of ordinary skill in the art that within the scope of the embodiments described in this application, There are many more embodiments and implementations. Although many possible combinations of features are shown in the drawings and discussed in the detailed description, many other combinations of the disclosed features are possible. Unless expressly limited, any feature or element of any embodiment may be used in combination with any other feature or element of any other embodiment, or may be substituted for any other features or elements in any other embodiments.

This application includes and contemplates combinations with features and elements known to those of ordinary skill in the art. The embodiments, features and elements that have been disclosed in this application may also be combined with any conventional features or elements to form unique inventive solutions as defined by the claims. Any feature or element of any embodiment may also be combined with features or elements from other inventive solutions to form another unique inventive solution as defined by the claims. Therefore, it should be understood that any feature shown and/or discussed in this application may be implemented individually or in any suitable combination. Accordingly, the embodiments are not to be limited except by those appended claims and their equivalents. Furthermore, various modifications and changes may be made within the scope of the appended claims.

Additionally, in describing representative embodiments, the specification may have presented methods and/or processes as a specific sequence of steps. However, to the extent that the method or process does not rely on the specific order of steps described herein, the method or process should not be limited to the specific order of steps described. As one of ordinary skill in the art will appreciate, other sequences of steps are possible. Therefore, the specific order of steps set forth in the specification should not be construed as limiting the claims. Furthermore, claims directed to the method and/or process should not be limited to steps performing them in the order written, as those skilled in the art can readily understand that these orders may be varied and still remain within the spirit and scope of the embodiments of the present application. Inside.

FIG. 1 is a structural block diagram of a battery provided by an exemplary embodiment of the present invention. As shown in FIG. 1 , the battery may include: a battery cell 11 and a battery control module 12 .

The battery control module is used to: periodically obtain the temperature of the battery core during the charging process, and when the temperature of the battery core is less than the preset first temperature threshold, control the battery core to stop charging and heat the battery core; after heating and the battery When the temperature of the core is greater than or equal to the first temperature threshold, the battery core is controlled to start charging.

The low-temperature charging and heating solution proposed by the present invention can utilize the existing battery architecture and optimize and upgrade the heating strategy to achieve the purpose of ultra-low temperature fast charging, and can be widely used in industrial applications.

Because when the temperature of the battery core is low, the chemical activity of the battery is low and it cannot be charged with high current. Therefore, current low-temperature fast charging is mainly a method of limiting current at relatively low temperatures.

In this embodiment, during the normal charging process, the temperature of the battery core is continuously detected. When the temperature is low (for example, lower than the first temperature threshold), charging is stopped and heating is performed. After heating, the temperature of the battery core is satisfied (than If it is greater than or equal to the first temperature threshold), then charge. Heating the low-temperature battery first and then charging the battery does not need to limit the charging current or voltage. The battery can be charged normally. This avoids the problem that limiting the voltage or current when charging the battery at low temperature will lengthen the charging time and result in poor user experience. In addition, continuously detecting the temperature of the battery core during normal charging can prevent the problem that the battery core will cool down over time after heating.

In this embodiment, the battery may include a rechargeable battery such as a lithium battery. The battery control module may be a central processing unit (CPU), an application specific integrated circuit (ASIC), or one or more integrated circuits that implement embodiments of the present invention.

The value of the preset first temperature threshold can be determined according to the actual application environment or experience value, and will not be limited or described in detail in this embodiment.

The battery provided by the embodiment of the present invention continuously detects the temperature of the battery core during the normal charging process, and first heats the low-temperature battery before charging the battery. The battery can be charged normally without limiting the charging current or voltage. Charging, avoid the problem of limiting the voltage or current when the battery is charged at low temperature, which will lengthen the charging time and lead to poor user experience. In addition, continuously detecting the temperature of the battery core during normal charging can prevent the problem that the battery core will cool down over time after heating.

Figure 2 is a structural block diagram of a battery provided by another example embodiment of the present invention. As shown in Figure 2, the battery control module 12 may include: a battery management chip 121, a battery microprocessor 122 and a heating module 123. The battery management chip can be connected to the battery microprocessor through the communication port, and the battery microprocessor can be connected to the heating module.

The battery management chip is used to monitor the temperature of the battery core and send it to the battery microprocessor. It controls the battery core to stop charging when it receives the charging off signal sent by the battery microprocessor. It controls the battery core to stop charging when it receives the charging on signal sent by the battery microprocessor. time to control the battery cell to start charging.

The battery microprocessor is used to periodically obtain the temperature of the battery core during the charging process, and when the temperature of the battery core is less than the first temperature threshold, send a charging shutdown signal to the battery management chip, and send a heating control signal to the heating module; After heating and when the temperature of the battery core is greater than or equal to the first temperature threshold, a charging start signal is sent to the battery management chip.

Heating module is used for heating according to the heating control signal.

The battery can be equipped with a battery management chip and a battery microprocessor, and the battery microprocessor can read the cell temperature collected by the battery management chip through the communication port. The battery microprocessor sends a charging start signal to the battery management chip to allow the battery to charge normally, and the battery microprocessor can continuously read the cell temperature collected by the battery management chip through the communication port during the charging process. When the temperature of the battery core is less than the preset first temperature threshold, a charging shutdown signal is sent to the battery management chip to stop charging the battery, and a heating control signal is sent to the heating module for heating. Afterwards, the battery microprocessor reads the battery core temperature collected by the battery management chip through the communication port, and determines whether to continue heating or stop heating based on the collected battery core temperature before starting charging.

In this embodiment, the battery management chip can communicate with the battery microprocessor through the communication port. The battery management chip can monitor and collect the temperature of the battery core. The battery microprocessor can read the temperature collected by the battery management chip through the communication port. According to the core temperature collected, it is determined whether to charge the battery directly or to charge the battery after heating.

In this embodiment, the battery microprocessor can be connected to the heating module, and the battery microprocessor can send a heating control signal to the heating module to control the opening or closing of the heating module. When the battery microprocessor determines that the battery core needs to be heated based on the obtained battery core temperature, it sends a heating control signal to the heating control module. The heating control signal can be a level signal, and the high level is valid. When the heating control signal is at a high level, the heating module can be turned on for heating. When the heating control signal is low level, the heating module is not conducting and does not heat or stops heating. The heating module can be a heating sheet or heating wire.

In one example, the model of the battery management chip may be BQ40Z50, BQ40Z80, or SH366006, etc. This type of chip can detect parameters such as temperature, current, and voltage of the battery cell.

In an example, as shown in FIG. 2 , the battery control module may also include a temperature acquisition module 124 for monitoring the temperature of the battery core and sending it to the battery management chip.

In an exemplary embodiment of the present invention, as shown in Figure 2, the battery may further include an input and output port 13, and the battery control module may further include a switch 125 disposed between the battery cell and the input and output port.

The battery management chip is also used to control the switch to open when receiving the charging off signal sent by the battery microprocessor, so that the battery cell stops charging; when receiving the charging on signal sent by the battery microprocessor, the control switch is closed, Let the battery cell start charging.

The switch can also be called a charge and discharge circuit switch. The switch can be controlled by the positive end or the negative end. In this embodiment, the switch is controlled by the positive terminal as an example, and the switch is controlled by the negative terminal. It is similar to the principle that the switch is controlled by the positive terminal, which will not be described in detail in this embodiment.

The positive terminal of the battery cell passes through the switch to the input and output port and then flows through the negative terminal of the battery cell. The battery management chip controls the opening or closing of the switch, forming a large current loop of the battery. The battery management chip receives the charging on signal or the charging off signal sent by the battery microprocessor, and controls the opening or closing of the switch accordingly, so that the battery cell starts charging or stops charging. When the switch is open, the battery cell starts charging; when the switch is closed, the battery cell stops charging.

In an exemplary embodiment of the present invention, the battery microprocessor is also used to obtain the power of the battery core when sending a charging shutdown signal to the battery management chip, and when the power of the battery core is greater than or equal to the preset power threshold, the battery microprocessor Heating is performed; when the power of the battery core is less than the power threshold, a low battery alarm is issued.

The battery management chip can monitor and store the temperature of the battery core. When or after the battery microprocessor sends a charging shutdown signal to the battery management chip, it can also obtain the battery power from the battery management chip through the communication port, and determine the battery power based on the battery power. Alarm for battery core heating or low battery. The value of the preset power threshold can be determined according to the actual application environment or experience value, and will not be limited or described in detail in this embodiment.

After the battery cell stops charging and before heating the battery core, judging the battery capacity can prevent low-power batteries from over-discharging, causing battery over-discharge protection, and even damaging the battery.

In an example embodiment of the present invention, as shown in Figure 2, the battery control module may further include: a voltage sampling module 126 and a current sampling module 127.

The voltage sampling module is used to monitor the voltage of the battery cells and send it to the battery management chip.

The current sampling module is used to monitor the current of the battery cell and send it to the battery management chip. The current sampling module is set in the charge and discharge circuit of the battery core. The positive terminal of the battery core passes through the switch to the input and output port, then passes through the current sampling module, and finally flows through the negative terminal of the battery core.

The battery management chip is also used to determine the battery capacity based on voltage and current.

The battery management chip can collect the voltage and current of the battery core through the voltage sampling module and current acquisition module respectively to determine the power of the battery core. Existing solutions can be used to determine the power of the battery core based on the current and voltage of the battery core. For example, the power of the battery core can be the product of the collected voltage and current of the battery core. This embodiment will not be limited or repeated here.

In an exemplary embodiment of the present invention, the battery microprocessor is also used to determine when a charger is connected to the input and output ports, and obtain the temperature of the battery core. When the temperature of the battery core is greater than the preset second temperature threshold, Perform an over-temperature alarm; when the temperature of the battery core is less than the preset third temperature threshold, send a heating control signal to the control module; when the temperature of the battery core is greater than or equal to the third temperature threshold and less than or equal to the second temperature threshold, Send a charging turn-on signal to the battery management chip.

The second temperature threshold is greater than the third temperature threshold. The values of the preset second temperature threshold and the third temperature threshold may be determined according to the actual application environment or experience values, and will not be limited or described in detail in this embodiment.

In this embodiment, the battery microprocessor can also obtain the temperature of the battery core when the battery is connected to the charger, and determine whether to charge the battery core directly, or to charge the battery core after heating, or based on the temperature of the battery core. It is an over-temperature alarm.

When it is detected that a charger is connected to the input and output ports, the battery microprocessor can read the temperature of the battery cells collected by the battery management chip through the communication port. The temperature of the battery core can be compared with a preset second temperature threshold and a preset third temperature threshold respectively. When the temperature of the battery core is greater than the second temperature threshold, the battery microprocessor issues a charging over-temperature alarm. When the temperature of the battery core is less than or equal to the second temperature threshold, it can be continued to determine whether the temperature of the battery core is greater than or equal to the third temperature threshold. When the temperature of the battery core is greater than or equal to the third temperature threshold and less than or equal to the second temperature threshold, When the battery is charging, the battery microprocessor sends a charging turn-on signal to the battery management chip to turn on the switch so that the battery core can be charged normally. In addition, the battery microprocessor can periodically read the data collected by the battery management chip through the communication port during the charging process. The temperature of the battery core determines whether to stop charging during the charging process based on the temperature of the battery core, and then continues charging after heating the battery core.

When the temperature of the battery core is less than or equal to the third temperature threshold, the battery microprocessor sends a charging shutdown signal to the battery management chip to turn off the switch, causing the battery core to shut down charging, and read the battery power. When the power of the battery core is less than the preset power threshold, the battery microprocessor performs low-temperature charging and heating and alarms for low power. When the power of the battery core is greater than or the preset power threshold, the battery microprocessor controls the heating module to heat the battery core. Afterwards, the battery microprocessor reads the battery core temperature collected by the battery management chip through the communication port, and determines whether to continue heating or stop heating based on the collected battery core temperature before starting charging.

In an exemplary embodiment of the present invention, the preset first temperature threshold is greater than or equal to the preset third temperature threshold and less than the preset second temperature threshold. The first temperature threshold is used to determine whether to heat the battery core during charging. The temperature threshold is greater than or equal to the third temperature threshold used to determine whether to heat the battery core before charging, which can avoid charging the battery core when the temperature of the battery core is low. And, during the charging process, it is used to The first temperature threshold used to determine whether to heat the battery core is smaller than the second temperature threshold used to determine whether to issue an over-temperature alarm before charging, which can avoid heating the battery core when the battery core temperature is high.

In an example embodiment of the present invention, as shown in Figure 2, the battery control module may also include: a charging detection module 128, which is connected to the input and output ports and the battery microprocessor.

The charging detection module is used to detect whether a charger is connected to the input and output ports and send a detection signal to the battery microprocessor; the battery microprocessor is also used to determine whether a charger is connected to the input and output ports based on the detection signal.

A charging detection module can be set between the input and output ports and the battery microprocessor, and the charging detection module can be used to detect whether a charger is connected to the input and output ports. When the charger is connected to the input and output ports, the charging detection module detects that the charger is inserted, and feeds back the information that the charger is detected to the battery microprocessor. The detection signal can be used to indicate whether the charger is detected to be inserted.

In an exemplary embodiment of the present invention, Figure 3 is a circuit schematic diagram of a charging detection module provided by an exemplary embodiment of the present invention. As shown in Figure 3, the charging detection module may include: a first voltage dividing resistor R97, a second voltage dividing resistor R97, Piezoresistor R98 and field effect transistor Q23.

One end of the first voltage-dividing resistor is connected to the gate of the field-effect transistor, and the other end of the first voltage-dividing resistor serves as the forward input terminal for charging; one end of the second voltage-dividing resistor is connected to the gate of the field-effect transistor, and the second The other end of the voltage dividing resistor is connected to the source of the field effect transistor, and the connection end of the two is used as the negative input terminal for charging; the drain of the field effect transistor is connected to the battery microprocessor.

The battery microprocessor is also used to detect that the detection signal CHG_IN_wake jumps from the first level (such as high level) to the second level (such as level), and determine that a charger is connected to the input and output ports.

The charging detection module circuit can use a combination circuit of a voltage dividing resistor and a field effect transistor, as shown in Figure 3. PACK+ represents the positive input terminal voltage of charging, and DGND represents the negative input terminal voltage of charging. When voltage is added to PACK+, after the voltage is divided by the first voltage dividing resistor R97 and the second voltage dividing resistor R98, the field effect transistor Q23 is turned on, causing the detection signal CHG_IN_wake to change from high level to low level, thus Detected by the battery microprocessor that a charger is plugged in.

In an example, as shown in Figure 3, the drain of the field effect transistor Q23 can be connected to the high level VCC through the resistor R96, and the voltage value of VCC can be 3V. The resistance values of resistors R96, R97 and R98 can be 100KΩ, 100KΩ and 47KΩ respectively. The model of field effect triode Q23 can be but not limited to Yu is 2N7002W.

In an exemplary embodiment of the present invention, as shown in Figure 2, the battery control module may also include: a charging power supply 129. The voltage of the battery core supplies power to the battery microprocessor after passing through the regulated power supply.

Figure 4 is a flow chart of a battery charging method provided by an example embodiment of the present invention. As shown in Figure 4, the battery charging method may include:

S401: Periodically obtain the temperature of the battery core during the charging process.

S402: When the temperature of the battery core is less than the preset first temperature threshold, control the battery core to stop charging and heat the battery core.

S403: After heating and when the temperature of the battery core is greater than or equal to the first temperature threshold, control the battery core to start charging.

The execution subject of the battery charging method provided by the embodiments of the present invention is the battery control module shown in any of the above embodiments. Its implementation principles and implementation effects are similar and will not be described again here.

In an exemplary embodiment of the present invention, after controlling the battery core to stop charging and before heating the battery core, the method may further include:

Obtain the power of the battery core; when the power of the battery core is greater than or equal to the preset power threshold, the battery core is heated; when the power of the battery core is less than the power threshold, a low battery alarm is issued.

In an example embodiment of the present invention, the battery charging method may further include:

When it is determined that a charger is connected, the temperature of the battery core is obtained. When the temperature of the battery core is greater than the preset second temperature threshold, an over-temperature alarm is issued; when the temperature of the battery core is less than the preset third temperature threshold, an over-temperature alarm is issued. The battery core is heated; when the temperature of the battery core is greater than or equal to the third temperature threshold and less than or equal to the second temperature threshold, the battery core is controlled to start charging; the second temperature threshold is greater than the third temperature threshold.

Figure 5 is a flow chart of a battery charging method provided by another example embodiment of the present invention. As shown in Figure 5, the battery charging method may include:

S501: The input and output ports are connected to the charger.

S502: The charging detection module detects the charger insertion and feeds back the charger insertion information to the battery microprocessor.

S503: The battery microprocessor reads the temperature of the battery core collected by the battery management chip through the communication port.

S504: Determine whether the temperature of the battery core is greater than the preset second temperature threshold A. If yes, execute S505; otherwise, execute S506.

S505: The battery microprocessor issues a charging over-temperature alarm.

S506: Determine whether the temperature of the battery core is less than the preset third temperature threshold B. If yes, execute S508; otherwise, execute S507.

S507: The battery microprocessor sends a charging turn-on signal to the battery management chip to turn on the switch so that the battery cells can be charged normally.

S508: The battery microprocessor sends a charging shutdown signal to the battery management chip to turn off the switch, so that the battery core does not charge or stops charging, and reads the battery power.

S509: Determine whether the battery power is less than the preset power threshold C. If yes, execute S510; otherwise, execute S511.

S510: The battery microprocessor is charging at low temperature and the heating power is low.

S511: The battery microprocessor controls the heating module to heat the battery core and executes S503.

When the input and output ports are connected to the charger, the charging detection module detects that the charger is inserted and feeds back the information that the charger is detected to the battery microprocessor. The battery microprocessor reads the information collected by the battery management chip through the communication port. Cell temperature.

If the temperature of the battery core is greater than the preset second temperature threshold A, the battery microprocessor issues a charging over-temperature alarm; otherwise, it continues to determine whether the temperature of the battery core is lower than the preset third temperature threshold B. If the temperature of the battery core is not less than B, the battery microprocessor sends instructions to the battery management chip to turn on the switch so that the battery cells can be charged normally, and the battery microprocessor can continuously read the temperature of the battery cells collected by the battery management chip through the communication port during the charging process. .

If the temperature of the battery core is lower than B, the battery microprocessor sends an instruction to the battery management chip to turn off the switch, causing the battery to stop charging or not charging, and read the power of the battery core. If the power of the battery core is less than the preset power threshold C, the battery microprocessor will issue an alarm for low temperature charging and heating power. If the power of the battery core is greater than or equal to C, the battery microprocessor controls the heating module to heat the battery core. Then, the battery microprocessor reads the temperature of the battery core collected by the battery management chip through the communication port, and continues the judgment in the following steps.

Those of ordinary skill in the art can understand that all or some steps, Functional modules/units in systems and devices may be implemented as software, firmware, hardware and appropriate combinations thereof. In hardware implementations, the division between functional modules/units mentioned in the above description does not necessarily correspond to the division of physical components; for example, one physical component may have multiple functions, or one function or step may consist of several physical components. Components execute cooperatively. Some or all of the components may be implemented as software executed by a processor, such as a digital signal processor or a microprocessor, or as hardware, or as an integrated circuit, such as an application specific integrated circuit. Such software may be distributed on computer-readable media, which may include computer storage media (or non-transitory media) and communication media (or transitory media). As is known to those of ordinary skill in the art, the term computer storage media includes volatile and nonvolatile media implemented in any method or technology for storage of information such as computer readable instructions, data structures, program modules or other data. removable, removable and non-removable media. Computer storage media includes, but is not limited to, RAM, ROM, EEPROM, flash memory or other memory technology, CD-ROM, Digital Versatile Disk (DVD) or other optical disk storage, magnetic cassettes, tapes, disk storage or other magnetic storage devices, or may Any other medium used to store the desired information and that can be accessed by a computer. Additionally, it is known to those of ordinary skill in the art that communication media typically embodies computer readable instructions, data structures, program modules or other data in a modulated data signal such as a carrier wave or other transport mechanism, and may include any information delivery media .

Claims

A battery, characterized in that it includes: a battery cell and a battery control module;

The battery control module is used to periodically obtain the temperature of the battery core during the charging process, and when the temperature of the battery core is less than a preset first temperature threshold, control the battery core to stop charging and charge the battery. The battery core is heated; after heating and the temperature of the battery core is greater than or equal to the first temperature threshold, the battery core is controlled to start charging.
The battery according to claim 1, wherein the battery control module includes: a battery management chip, a battery microprocessor and a heating module;

The battery management chip is used to monitor the temperature of the battery core and send it to the battery microprocessor. When receiving the charging shutdown signal sent by the battery microprocessor, it controls the battery core to stop charging. When the battery microprocessor sends a charging start signal, control the battery core to start charging;

The battery microprocessor is used to periodically obtain the temperature of the battery core during the charging process, and when the temperature of the battery core is less than the first temperature threshold, send a charging shutdown signal to the battery management chip, and sending a heating control signal to the heating module; after heating and when the temperature of the battery core is greater than or equal to the first temperature threshold, sending a charging turn-on signal to the battery management chip;

The heating module is used for heating according to the heating control signal.
The battery according to claim 2, wherein the battery further includes: an input and output port, and the battery control module further includes: a switch disposed between the battery core and the input and output port;

The battery management chip is also used to control the switch to open when receiving the charging shutdown signal sent by the battery microprocessor, so that the battery core stops charging; when receiving the charging shutdown signal sent by the battery microprocessor, When the charging turn-on signal is received, the switch is controlled to close, causing the battery core to start charging.
The battery according to claim 2 or 3, characterized in that the battery microprocessor is also used to obtain the power of the battery core when sending the charging shutdown signal to the battery management chip. When the power of the battery core is greater than or equal to the preset power threshold, the battery core is heated; when the power of the battery core is less than the power threshold, a low battery alarm is performed.
The battery according to claim 4, wherein the battery control module further includes: a voltage sampling module and a current sampling module;

The voltage sampling module is used to monitor the voltage of the battery core and send it to the battery management chip;

The current sampling module is used to monitor the current of the battery core and send it to the battery management chip;

The battery management chip is also used to determine the power of the battery core based on the voltage and the current.
The battery according to claim 3, characterized in that the battery microprocessor is also used to determine that when a charger is connected to the input and output ports, obtain the temperature of the battery core. When the temperature is greater than the preset second temperature threshold, an over-temperature alarm is performed; when the temperature of the battery core is less than the preset third temperature threshold, a heating control signal is sent to the control module; when the temperature of the battery core When the temperature is greater than or equal to the third temperature threshold and less than or equal to the second temperature threshold, send a charging turn-on signal to the battery management chip;

Wherein, the second temperature threshold is greater than the third temperature threshold.
The battery according to claim 6, wherein the battery control module further includes: a charging detection module, the charging detection module is connected to the input and output ports and the battery microprocessor;

The charging detection module is used to detect whether a charger is connected to the input and output ports and send a detection signal to the battery microprocessor; the battery microprocessor is also used to determine the battery microprocessor based on the detection signal. Check whether a charger is connected to the input and output ports.
The battery according to claim 7, wherein the charging detection module includes: a first voltage dividing resistor, a second voltage dividing resistor and a field effect transistor;

One end of the first voltage dividing resistor is connected to the gate of the field effect transistor, and the other end of the first voltage dividing resistor is used as a forward input terminal for charging; one end of the second voltage dividing resistor is connected to the gate of the field effect transistor. The gate of the field effect triode is connected, the other end of the second voltage dividing resistor is connected to the source of the field effect triode, and the connection end of the two is used as the negative input terminal for charging; the field effect triode The drain is connected to the battery microprocessor;

The battery microprocessor is also configured to detect that the detection signal jumps from the first level to the second level, and determine that a charger is connected to the input and output ports.
A battery charging method, characterized by including:

Periodically obtain the temperature of the battery core during the charging process;

When the temperature of the battery core is less than the preset first temperature threshold, control the battery core to stop charging and heat the battery core;

After heating and when the temperature of the battery core is greater than or equal to the first temperature threshold, the battery core is controlled to start charging.
The method according to claim 9, characterized in that after controlling the battery core to stop charging and before heating the battery core, the method further includes:

Obtain the power of the battery core; when the power of the battery core is greater than or equal to the preset power threshold, heat the battery core; when the power of the battery core is less than the power threshold, perform low power Call the police;

The method also includes:

When it is determined that a charger is connected, the temperature of the battery core is obtained. When the temperature of the battery core is greater than the preset second temperature threshold, an over-temperature alarm is issued; when the temperature of the battery core is lower than the preset third temperature threshold, When the temperature threshold is three, the battery core is heated; when the temperature of the battery core is greater than or equal to the third temperature threshold and less than or equal to the second temperature threshold, the battery core is controlled to start charging; so The second temperature threshold is greater than the third temperature threshold.