CN113119800B - Battery heating and charging method, device, equipment and storage medium - Google Patents

Battery heating and charging method, device, equipment and storage medium Download PDF

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Publication number
CN113119800B
CN113119800B CN201911409231.7A CN201911409231A CN113119800B CN 113119800 B CN113119800 B CN 113119800B CN 201911409231 A CN201911409231 A CN 201911409231A CN 113119800 B CN113119800 B CN 113119800B
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battery pack
temperature
charging
external power
energy storage
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CN113119800A (en
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宋淦
熊永
马锐
林业福
阙衍升
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BYD Co Ltd
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BYD Co Ltd
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
    • B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
    • B60L58/24—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries for controlling the temperature of batteries
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
    • B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
    • B60L58/12—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries responding to state of charge [SoC]
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02T90/10—Technologies relating to charging of electric vehicles
    • Y02T90/14—Plug-in electric vehicles

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)
  • Secondary Cells (AREA)

Abstract

The embodiment of the application discloses a method, a device, equipment and a storage medium for heating and charging a battery, wherein the method comprises the following steps: if the first temperature of the battery pack is detected to be greater than or equal to a first temperature threshold value and the first temperature is smaller than a second temperature threshold value, acquiring the charging power of an external power supply; verifying whether the first temperature of the battery pack needs to be adjusted according to the charging power of the external power supply; if the first temperature of the battery pack needs to be adjusted, the first temperature of the battery pack is adjusted to a second temperature, the battery pack is charged by the external power supply, the second temperature is greater than a third temperature threshold, and the third temperature threshold is greater than the second temperature threshold. By adopting the embodiment of the application, the charging time of the battery pack can be shortened by adjusting the temperature of the battery pack, and the charging efficiency is improved.

Description

Battery heating and charging method, device, equipment and storage medium
Technical Field
The present application relates to the field of battery charging, and in particular, to a method, an apparatus, a device, and a storage medium for heating and charging a battery.
Background
The main energy source of the electric automobile is electric energy, so that the environmental pollution is avoided, the problems of automobile exhaust pollution, petroleum energy shortage and the like can be effectively solved, and the development trend of the automobile industry at present is formed. The energy source of the electric automobile is the battery, so long as the electric automobile is connected with the external power supply, the battery can be charged, the electric automobile is further provided with electric energy through the battery, the electric automobile can be conveniently provided with the electric energy, and the difficulty of providing the electric energy for the electric automobile is reduced. However, in practice, it is found that the charging efficiency of the existing charging method is relatively low, which seriously affects the use of the electric vehicle by the user, and therefore, how to improve the charging efficiency of the battery pack is a problem to be solved at present.
Disclosure of Invention
The embodiment of the application provides a battery heating and charging method, device, equipment and storage medium, and the temperature of a battery pack is adjusted, so that the charging time of the battery pack can be shortened, and the charging efficiency is improved.
In a first aspect, an embodiment of the present application provides a battery heating and charging method, including:
if the first temperature of the battery pack is detected to be greater than or equal to a first temperature threshold value and the first temperature is smaller than a second temperature threshold value, acquiring the charging power of an external power supply;
verifying whether the first temperature of the battery pack needs to be adjusted according to the charging power of the external power supply;
if the first temperature of the battery pack needs to be adjusted, the first temperature of the battery pack is adjusted to a second temperature, the battery pack is charged by the external power supply, the second temperature is greater than a third temperature threshold, and the third temperature threshold is greater than the second temperature threshold.
With reference to the first aspect, in one possible embodiment, the battery pack includes at least one battery; should acquire the state of charge of this battery package, include: acquiring the voltage of the battery in the battery pack, wherein the battery is any one of the at least one battery; determining that the state of charge of the battery pack is in the saturated state if the voltage of the battery is greater than or equal to a voltage threshold.
With reference to the first aspect, in one possible implementation manner, the acquiring the charge state of the battery pack includes: acquiring the electric quantity of the battery pack; and if the electric quantity of the battery pack is larger than a second electric quantity threshold value, determining that the charging state of the battery pack is in the saturation state.
With reference to the first aspect, in one possible implementation, the method further includes: acquiring the current of the battery pack and a fifth temperature of the battery pack; acquiring a third current threshold corresponding to the fifth temperature of the battery pack according to the corresponding relation between the temperature and the current threshold; if the current of the battery pack is larger than the third current threshold, the current of the battery pack is adjusted until the current of the battery pack is smaller than or equal to the third current threshold.
In a second aspect, an embodiment of the present application provides a battery heating and charging apparatus, including:
the first obtaining module is used for obtaining the charging power of the external power supply if the first temperature of the battery pack is detected to be greater than or equal to a first temperature threshold and the first temperature is smaller than a second temperature threshold;
a verification module for verifying whether the first temperature of the battery pack needs to be adjusted according to the charging power of the external power supply;
the first charging module is used for adjusting the first temperature of the battery pack to a second temperature if the first temperature of the battery pack needs to be adjusted, and charging the battery pack by adopting the external power supply, wherein the second temperature is greater than a third temperature threshold which is greater than the second temperature threshold.
With reference to the second aspect, in one possible implementation, the apparatus further includes: the second charging module is used for charging the battery pack by adopting the external power supply if the first temperature of the battery pack does not need to be adjusted; the second acquisition module is used for acquiring the electric quantity of the battery pack and a third temperature of the battery pack; and the adjusting module is used for adjusting the third temperature of the battery pack to a fourth temperature if the electric quantity of the battery pack is greater than a first electric quantity threshold and the third temperature is less than a second temperature threshold, wherein the fourth temperature is greater than the third temperature threshold.
With reference to the second aspect, in one possible implementation manner, the verification module includes: a first determining unit, configured to determine that the first temperature of the battery pack does not need to be adjusted if the charging power of the external power source is less than or equal to a first power threshold; a second determining unit, configured to determine that the first temperature of the battery pack needs to be adjusted if the charging power of the external power source is greater than the first power threshold.
With reference to the second aspect, in one possible implementation, the apparatus further includes: the third acquisition module is used for acquiring the charging state of the battery pack; and the pause module is used for pausing the charging of the battery pack if the charging state is in a saturated state.
With reference to the second aspect, in one possible implementation manner, the first charging module includes: the first charging unit is used for charging the first energy storage container by adopting the external power supply, the battery pack and the second energy storage container; the second charging unit is used for charging the battery pack by adopting the external power supply, the first energy storage container and the second energy storage container; and the adjusting unit is used for repeating the step of charging the first energy storage container and the step of charging the battery pack until the first temperature of the battery pack is adjusted to the second temperature.
With reference to the second aspect, in one possible implementation, the first charging unit includes: the first charging subunit is used for charging the first energy storage container by adopting the external power supply and the battery pack until the voltage of the first energy storage container is greater than or equal to that of the external power supply; and the second charging subunit is used for charging the first energy storage container by adopting the battery pack and the second energy storage container until the current of the first energy storage container is smaller than a first current threshold value, and the electric quantity of the second energy storage container is obtained by the battery pack.
With reference to the second aspect, in one possible implementation, the second charging unit includes: the third charging subunit is used for charging the battery pack by adopting the first energy storage container if the current of the first energy storage container is smaller than the first current threshold value until the voltage of the first energy storage container is smaller than the voltage of the external power supply; and the fourth charging subunit is used for charging the battery pack by adopting the external power supply and the second energy storage container until the current of the battery pack is smaller than a second current threshold value.
With reference to the second aspect, in one possible embodiment, the battery pack includes at least one battery; the third obtaining module includes: a first obtaining unit, configured to obtain a voltage of the battery in the battery pack, where the battery is any one of the at least one battery; a third determining unit, configured to determine that the state of charge of the battery pack is in the saturation state if the voltage of the battery is greater than or equal to a voltage threshold.
With reference to the second aspect, in one possible implementation manner, the third obtaining module includes: the second acquisition unit is used for acquiring the electric quantity of the battery pack; and the fourth determination unit is used for determining that the charging state of the battery pack is in the saturation state when the electric quantity of the battery pack is larger than the second electric quantity threshold.
With reference to the second aspect, in one possible implementation, the apparatus further includes: the fourth acquisition module is used for acquiring the current of the battery pack and the fifth temperature of the battery pack; a fifth obtaining module, configured to obtain a third current threshold corresponding to the fifth temperature of the battery pack according to a correspondence between the temperature and the current threshold; and the adjusting module is used for adjusting the current of the battery pack if the current of the battery pack is larger than the third current threshold until the current of the battery pack is smaller than or equal to the third current threshold.
In a third aspect, an embodiment of the present application provides a battery heating and charging apparatus, including a processor, a memory, and an input/output interface, where the processor, the memory, and the input/output interface are connected to each other, where the input/output interface is used to input or output data, the memory is used to store program codes, and the processor is used to call the program codes to execute the battery heating and charging method according to the first aspect.
In a fourth aspect, an embodiment of the present application provides a computer-readable storage medium, where a computer program is stored in the computer-readable storage medium, where the computer program includes program instructions, and when the program instructions are executed by a processor, the processor is caused to execute the battery heating and charging method according to the first aspect.
In this embodiment, if it is detected that the first temperature of the battery pack is greater than or equal to the first temperature threshold and the first temperature is less than the second temperature threshold, the charging power of the external power source may be obtained, and it is verified whether the first temperature of the battery pack needs to be adjusted according to the charging power of the external power source. If the first temperature of the battery pack needs to be adjusted, it is indicated that the first temperature does not belong to the charging power of the external power supply, and the temperature that the battery pack needs to reach when the external power supply is used for continuously charging the battery pack at high power cannot be quickly charged. Therefore, the first temperature of the battery pack needs to be adjusted to a second temperature, that is, the second temperature is a temperature at which the battery pack is continuously charged with high power by the external power supply under the charging power of the external power supply, and the battery pack is charged by the external power supply. Therefore, the first temperature of the battery pack is adjusted to reach the second temperature for continuously charging the battery pack at high power, and the external power supply is adopted to charge the battery pack, so that the battery pack is rapidly charged, the charging time is shortened, the charging efficiency is improved, and the service life of the battery is prolonged.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
Fig. 1 is a schematic flow chart illustrating a battery heating and charging method according to an embodiment of the present disclosure;
FIG. 2 is a schematic flow chart of another battery heating and charging method provided in an embodiment of the present application;
fig. 3 is a schematic structural diagram of a battery heating and charging system according to an embodiment of the present disclosure;
fig. 4 is a schematic structural diagram of a battery heating and charging device according to an embodiment of the present disclosure;
fig. 5a is a schematic structural diagram of a third obtaining module according to an embodiment of the present disclosure;
fig. 5b is a schematic structural diagram of another third obtaining module provided in the embodiment of the present application;
fig. 6 is a schematic structural diagram of a battery heating and charging apparatus according to an embodiment of the present disclosure.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only some embodiments of the present application, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
Referring to fig. 1, fig. 1 is a schematic flow chart of a battery heating and charging method according to an embodiment of the present disclosure, which can be performed by a battery heating and charging apparatus. As shown in fig. 1, the battery heating and charging method of the embodiment of the present application may include, but is not limited to, the following steps:
s101, if the first temperature of the battery pack is detected to be greater than or equal to a first temperature threshold value and the first temperature is smaller than a second temperature threshold value, the charging power of the external power supply is obtained.
In one possible embodiment, the battery pack may refer to a device for supplying electric energy, which may be used for supplying electric energy to an electric vehicle (such as an electric car, an electric motorcycle, etc.), but the battery pack may also be used for supplying electric energy to other objects. The battery pack may be composed of at least one battery, the number of batteries in the battery pack and the capacity of the battery pack may be set according to an application scenario, for example, the battery pack provides power for an electric vehicle, the capacity of the battery pack in the electric vehicle differs according to factors such as a brand and a place of production, and is generally between 15-60 kilowatt-hours, and the battery pack may include a plurality of batteries. If the battery pack provides electric energy for an electric vehicle (such as an electric automobile, an electric motorcycle, etc.), the battery heating and charging device may be a device mounted on the electric vehicle or a device integrated in the electric vehicle, and the battery heating and charging device may be used to control charging and discharging of the battery pack, control temperature increase of the battery pack, and so on. The first temperature threshold is a temperature value at which heating of the battery does not cause irreversible damage to the battery, and if the first temperature of the battery pack is lower than the first temperature threshold, the battery pack is charged by an external power supply, so that the charge and discharge performance of the battery pack is reduced, for example, the service life of the battery pack is shortened; the first temperature threshold may be determined according to the performance of the battery pack, or the first temperature threshold may be set by a user, or the first temperature threshold may be a default value (i.e., a default value set when the battery pack is shipped), for example, the first temperature threshold may be-20 degrees celsius or other values. The second temperature threshold refers to a minimum temperature value at which the battery pack can be fully charged, may be determined according to the performance of the battery pack, or may be set by a user. The external power source may be a device that directly charges the battery pack, for example, the external power source may include, but is not limited to: charging post or battery carried by the vehicle.
When the battery pack needs to be charged, the battery heating and charging equipment can monitor and acquire the temperature of the battery pack in real time, and particularly, the temperature of the battery pack can be acquired through a temperature sensor; alternatively, the temperature of the battery pack may be collected through a patch-type thermal resistor attached to the battery pack, for example, the battery heating and charging device may obtain the first temperature or the second temperature of the battery pack. The patch type thermal resistor may be made of a pure metal material, for example, the pure metal material may include platinum or copper. The patch type thermal resistor is the most commonly used temperature detector in the medium-low temperature region, and is used for collecting the temperature of the battery pack based on the characteristic that the resistance value of a metal conductor increases along with the increase of the temperature. The battery heating and charging equipment can acquire a first temperature of the battery pack and compare the first temperature with the first temperature threshold, if the first temperature of the battery pack is smaller than the first temperature threshold, the temperature of the battery pack needs to be increased, and at the moment, the charging power of the external power supply does not need to be acquired; if the first temperature of the battery pack is greater than or equal to the first temperature threshold and the first temperature is less than the second temperature threshold, it indicates that the battery pack can be directly charged by using the external power source. However, the charging power of the external power source has diversity, such as but not limited to: 7kW or 40 kW. Under different charging power, the temperature that the realization was carried out quick charge to the battery package corresponds is different, has corresponding relation between every charging power and one or more temperature promptly, and the temperature that charging power corresponds promptly is under this charging power, can realize carrying out quick charge's temperature to the battery package. That is to say, if the temperature of battery package when reaching the temperature that external power source's charging power corresponds, adopt this external power source to charge to the battery package, only need the short time just can make the electric quantity of battery package full of, charge efficiency is higher, can realize promptly carrying out quick charge to the battery package. If the temperature of battery package does not reach the temperature that external power source's charging power corresponds, adopt this external power source to charge to the battery package, need the longer time just can make the electric quantity of battery package full of, charge efficiency is lower, can not realize carrying out quick charge to the battery package promptly. Therefore, in order to realize rapid charging of the battery pack, the battery heating and charging device may obtain the charging power of the external power supply through the battery heating and charging device, specifically obtain the charging power of the external power supply according to the product information of the external power supply, where the product information corresponding to the external power supply includes the charging power information, or obtain the charging power of the external power supply in other manners.
It should be noted that the correspondence relationship between each charging power and one or more temperatures may be represented by a mapping table, as shown in table 1. The charging power of the external power supply is said to be in a low power state if the charging power of the external power supply belongs to (0, a first power threshold value), the charging power of the external power supply is said to be in a high power state if the charging power of the external power supply belongs to (a first power threshold value, ∞), the temperature of the battery pack is said to be in a low temperature state if the temperature of the battery pack belongs to [ a first temperature threshold value, a second temperature threshold value ], and the temperature of the battery pack is said to be in a high temperature state if the temperature of the battery pack belongs to [ a second temperature threshold value, a second temperature ]. As can be seen from table 1, if the charging power of the external power source is in a low power state, the battery pack at a low temperature is suitable for being rapidly charged, and if the charging power of the external power source is in a high power state, the battery pack at a high temperature is suitable for being rapidly charged. The first power threshold may be determined by a user according to the charging power of the external power source, for example, the first power threshold may be 7 kW; the second temperature threshold may be determined based on the performance of the battery pack or may be user set, for example, the second temperature threshold may be-5 degrees celsius or other value. In particular, the charging power of the external power supply is said to be in a high power state if it belongs to [ second power threshold, ∞ ], which may be user determined depending on the charging power of the external power supply, e.g. the second power threshold may be 40 kW. Of course, other ways may also be used to represent the corresponding relationship between each charging power and one or more temperatures, which is not limited in this embodiment of the application.
Charging power Temperature of
(0, first Power threshold)] [ first temperature threshold, second temperature threshold)
(first power threshold, infinity) [ second temperature threshold, second temperature]
TABLE 1 correspondence between charging power and temperature
S102, verifying whether the first temperature of the battery pack needs to be adjusted according to the charging power of the external power supply.
In a possible embodiment, since the first temperature of the battery pack is greater than or equal to the first temperature threshold and is less than the second temperature threshold, it indicates that the battery pack is in a low temperature state, and meanwhile, when the temperature of the battery pack is in the low temperature state, it is suitable to use an external power source with low power to rapidly charge the battery pack. Therefore, the battery heating and charging apparatus can verify whether the charging power of the external power source is in a low power state. Specifically, the battery heating and charging device may verify whether the charging power of the external power source is in the low power state according to the corresponding relationship between the charging power and the temperature, for example, it may be queried according to table 1 above whether the charging power of the external power source is in the low power state. If the charging power of the external power supply is in a low-power state, it is indicated that the charging power of the external power supply and the first temperature of the battery pack have a corresponding relationship, namely the first temperature of the battery pack reaches the temperature corresponding to the charging power of the external power supply, and the first temperature of the battery pack does not need to be adjusted; if the external power supply is in a high-power state, it indicates that the charging power of the external power supply does not have a corresponding relationship with the first temperature of the battery pack, that is, the first temperature of the battery pack does not reach the temperature corresponding to the charging power of the external power supply, and the first temperature of the battery pack needs to be adjusted.
In one embodiment, if the charging power of the external power source is less than or equal to a first power threshold, determining that the first temperature of the battery pack does not need to be adjusted; if the charging power of the external power source is greater than the first power threshold, determining that the first temperature of the battery pack needs to be adjusted.
If the charging power of the external power supply is smaller than or equal to the first power threshold, it indicates that the charging power of the external power supply is in a low power state, that is, it indicates that there is a corresponding relationship between the charging power of the external power supply and the first temperature of the battery pack, that is, the first temperature of the battery pack reaches the temperature corresponding to the charging power of the external power supply, and the first temperature of the battery pack does not need to be adjusted; if the charging power of the external power supply is greater than the first power threshold, it indicates that the charging power of the external power supply is in a high-power state, that is, it indicates that there is no correspondence between the charging power of the external power supply and the first temperature of the battery pack, that is, the first temperature of the battery pack does not reach a temperature corresponding to the charging power of the external power supply, and the first temperature of the battery pack needs to be adjusted, that is, the temperature of the battery pack needs to be raised.
S103, if the first temperature of the battery pack needs to be adjusted, adjusting the first temperature of the battery pack to a second temperature, and charging the battery pack by using the external power source, where the second temperature is greater than a third temperature threshold, and the third temperature threshold is greater than the second temperature threshold.
In one possible embodiment, the third temperature threshold refers to a temperature at which the battery pack can be continuously charged with high power, and the third temperature threshold may be determined according to the performance of the battery pack, or the third temperature threshold may be set by a user. If the first temperature of the battery pack needs to be adjusted, it indicates that the charging power of the external power source is in a high-power state, that is, it indicates that the charging power of the external power source does not have a corresponding relationship with the first temperature of the battery pack, that is, at the first temperature, continuous high-power charging of the battery pack cannot be achieved, and therefore, the temperature of the battery pack needs to be increased. Specifically, the battery heating and charging device may repeat discharging and charging the battery pack to raise the first temperature of the battery pack to the second temperature. The battery heating and charging device can obtain the second temperature of the battery pack, compare the second temperature with the third temperature threshold, and if the second temperature is greater than the third temperature threshold, indicate that the battery pack is in a high-temperature state at the moment, that is, indicate that the charging power of the external power supply has a corresponding relationship with the second temperature of the battery pack, that is, the second temperature of the battery pack reaches the temperature corresponding to the charging power of the external power supply, that is, at the second temperature, continuous high-power charging of the battery pack can be realized.
In this embodiment, if it is detected that the first temperature of the battery pack is greater than or equal to a first temperature threshold and the first temperature is less than a second temperature threshold, the charging power of the external power source may be obtained, and it is verified whether the first temperature of the battery pack needs to be adjusted according to the charging power of the external power source. If the first temperature of the battery pack needs to be adjusted, it is indicated that the first temperature does not belong to the charging power of the external power supply, and the temperature of the battery pack is required to reach when the external power supply is used for continuously charging the battery pack at high power, so that the battery pack cannot be rapidly charged. Therefore, the first temperature of the battery pack needs to be adjusted to a second temperature, that is, the second temperature is a temperature at which the battery pack is continuously charged with high power by the external power supply under the charging power of the external power supply, and the battery pack is charged by the external power supply. Therefore, the first temperature of the battery pack is adjusted to reach the second temperature for continuously charging the battery pack at high power, and the external power supply is adopted to charge the battery pack, so that the battery pack is rapidly charged, the charging time is shortened, the charging efficiency is improved, and the service life of the battery is prolonged.
Based on the above description, referring to fig. 2, fig. 2 is a schematic flow chart of another battery heating and charging method provided in the embodiment of the present application. As shown in fig. 2, another method for heating and charging a battery according to the embodiment of the present application may include, but is not limited to, the following steps:
s201, if the first temperature of the battery pack is detected to be greater than or equal to a first temperature threshold value and the first temperature is smaller than a second temperature threshold value, the charging power of the external power supply is obtained.
In a possible implementation manner, step S201 in the embodiment of the present application may refer to step S101 in the embodiment shown in fig. 1, and details are not repeated here.
S202, verifying whether the first temperature of the battery pack needs to be adjusted according to the charging power of the external power source, if so, performing step S203, and if not, performing step S206.
In a possible implementation manner, step S202 in the embodiment of the present application may refer to step S102 in the embodiment shown in fig. 1, and is not described herein again.
And S203, charging the first energy storage container by adopting the external power supply, the battery pack and the second energy storage container.
In one possible embodiment, the first energy storage container or the second energy storage container may be a device for inputting, outputting or storing an electrical quantity, for example, the first energy storage container or the second energy storage container may be a capacitive element and/or an inductive element, wherein the capacitive element may be an element in which the output variable leads the input variable in phase, and the inductive element may be an element in which the output variable lags the input variable in phase.
If the first temperature of the battery pack needs to be adjusted, the charging power of the external power supply is in a high-power state, and the battery pack is suitable for charging when the battery pack is in a high-temperature state, namely the battery pack cannot be continuously charged in high power at the first temperature, so that the temperature of the battery pack needs to be increased; specifically, if the first temperature of the battery pack needs to be adjusted, an external power supply, the battery pack and the second energy storage container can be used for charging the first energy storage container; for example, the first energy storage container can be charged by three of the external power supply, the battery pack and the second energy storage container; or, the first energy storage container may be charged by an external power supply and a battery pack, and then the second energy storage container is used to charge the first energy storage container; alternatively, the first energy storage container may be charged by three external power sources, a battery pack and a second energy storage container, and the charging time and the charging sequence of each device for the first energy storage container may be set by a user, or determined by the performance of the external power sources, the battery pack and the second energy storage container. Of course, other combinations may also be used to control the external power source, the battery pack, and the second energy storage container to charge the first energy storage container, which is not limited in this application.
Optionally, the method for charging the first energy storage container by using the external power supply, the battery pack and the second energy storage container may include, but is not limited to, the following steps:
step one, the external power supply and the battery pack are adopted to charge the first energy storage container until the voltage of the first energy storage container is greater than or equal to the voltage of the external power supply.
Specifically, when the temperature of the battery pack needs to be raised, a first discharging stage may be entered, where the first discharging stage is to charge the first energy storage container by using the external power source and the battery pack until the voltage of the first energy storage container is greater than or equal to the voltage of the external power source, the first discharging stage corresponds to the battery pack being in a discharging state, and a second discharging stage is entered, and the second discharging stage corresponds to the battery pack being in a discharging state.
And step two, charging the first energy storage container by adopting the battery pack and the second energy storage container until the current of the first energy storage container is smaller than a first current threshold value, and acquiring the electric quantity of the second energy storage container through the battery pack.
Specifically, if the voltage of the first energy storage container is greater than or equal to the voltage of the external power supply, a second discharging stage may be entered, where the second discharging stage is to disconnect the external power supply from the battery pack and the first energy storage container, so that the external power supply stops supplementing the battery pack and the first energy storage container with electric quantity, and perform self-discharging by using the battery pack through the second energy storage container until the electric quantity obtained by the second energy storage container reaches the electric quantity upper limit value of the second energy storage container; and then, charging the first energy storage container by adopting the battery pack and the second energy storage container until the current of the first energy storage container is smaller than a first current threshold value, wherein the second discharging stage corresponds to the discharging state of the battery pack. Here, the first charge threshold may be set by a user or may be set according to the performance of the battery pack, for example, the first current threshold may be zero; here, the current of the first energy storage container is the current of the discharge loop corresponding to the second discharge stage, and the discharge loop corresponding to the second discharge stage is the loop formed by the battery pack, the second energy storage container and the first energy storage container. And if the current of the first energy storage container is smaller than a first current threshold, determining that the current in the discharging loop corresponding to the second discharging stage is zero, and entering a first charging stage, wherein the first charging stage corresponds to the charging state of the battery pack.
And S204, charging the battery pack by adopting the external power supply, the first energy storage container and the second energy storage container.
In one possible embodiment, the battery pack may be charged by using three of the external power source, the first energy storage container and the second energy storage container; or, the external power supply and the first energy storage container may be used to charge the battery pack, and then the second energy storage container may be used to charge the battery pack; alternatively, the external power supply, the first energy storage container and the second energy storage container may be used to charge the battery pack, and the charging duration and charging sequence of each device to the battery pack may be set by a user, or determined by the performance of the external power supply, the first energy storage container and the second energy storage container. Of course, other combinations may also be used to control the external power source, the first energy storage container and the second energy storage container to charge the battery pack, which is not limited in this application.
Optionally, the method for charging the battery pack by using the external power source, the first energy storage container and the second energy storage container may include, but is not limited to, the following steps:
step one, if the current of the first energy storage container is smaller than the first current threshold, the first energy storage container is adopted to charge the battery pack until the voltage of the first energy storage container is smaller than the voltage of the external power supply.
Specifically, if the current of the first energy storage container is smaller than the first current threshold, a first charging stage is entered, and the voltage of the first energy storage container is larger than the voltage of the battery pack, the first charging stage refers to that the first energy storage container is used for charging the battery pack until the voltage of the first energy storage container is smaller than the voltage of the external power supply, and the first charging stage corresponds to the state of charge of the battery pack.
And step two, the external power supply and the second energy storage container are adopted to charge the battery pack until the current of the battery pack is smaller than a second current threshold value.
Specifically, if the voltage of the first energy storage container is smaller than the voltage of the external power supply, a second charging stage is entered, and the second charging stage corresponds to the state of charge of the battery pack. The second charging stage is to charge the battery pack by using the external power supply until the voltage of the external power supply is less than that of the battery pack; and disconnecting the external power supply from the battery pack, and charging the battery pack by using the second energy storage container until the current of the battery pack is smaller than the second current threshold. For example, the second current threshold may be zero. And if the current of the battery pack is smaller than the second current threshold, determining that the current in the charging loop corresponding to the second charging stage is zero.
The external power supply, the first energy storage container, the second energy storage container and the battery pack are alternately switched into the first discharging stage, the second discharging stage, the first charging stage and the second charging stage according to a target frequency, current in opposite directions continuously flows through the battery pack to heat the battery pack, so that the temperature of the battery pack is increased, meanwhile, the external power supply can be adopted to supplement the electric quantity consumed in the heating process of the battery pack, and therefore the value of the remaining electric quantity (SOC) of the battery pack is guaranteed not to change, and even if the SOC value of the battery pack is very low, the temperature of the battery pack can still be rapidly increased. The target frequency may be determined by electrochemical impedance spectroscopy testing experiments. The first current threshold and the second current threshold may be the same.
S205, repeating the above steps of charging the first energy storage container and charging the battery pack until the first temperature of the battery pack is adjusted to the second temperature, and charging the battery pack by using the external power supply, where the second temperature is greater than a third temperature threshold, and the third temperature threshold is greater than the second temperature threshold.
In one possible embodiment, the third temperature threshold refers to a temperature at which the battery pack can be continuously charged with high power, and the third temperature threshold may be determined according to the performance of the battery pack, or the third temperature threshold may be set by a user. The step of charging the first energy storage container is a step of charging the first energy storage container by adopting an external power supply, a battery pack and a second energy storage container, and in the step of charging the first energy storage container, the battery pack is in a discharging state; the step of charging the battery pack is a step of charging the battery pack by using the external power supply, the first energy storage container and the second energy storage container, and in the step of charging the battery pack, the battery pack is in a charging state. The charging step of the first energy storage container and the charging step of the battery pack can be repeated according to the target frequency, namely, the battery pack can be alternately switched into a discharging state and a charging state according to the target frequency, and current in opposite directions continuously flows through the battery pack, so that the temperature of the battery pack is increased.
The battery heating and charging device can obtain the second temperature of the battery pack, if the second temperature of the battery pack is greater than the third temperature threshold, the battery pack is in a high-temperature state at the moment, namely, the charging power of the external power supply is in a corresponding relation with the second temperature of the battery pack, namely, the second temperature of the battery pack reaches the temperature corresponding to the charging power of the external power supply, namely, continuous high-power charging of the battery pack can be realized at the second temperature, at the moment, the above charging step of the first energy storage container and the charging step of the battery pack can be stopped to be repeated, the battery pack is charged by the external power supply, and therefore the battery pack is rapidly charged. Specifically, when the temperature of this battery package is higher, for example, the temperature of this battery package is the second temperature, it is safer to carry out high-power charging to this battery package, the charge efficiency of this battery package has been improved, and simultaneously, this third temperature threshold should not be too high, because carry out high-power charging to this battery package and can rise the temperature of this battery package, if before carrying out high-power charging to this battery package, the temperature of this battery package is too high, can lead to the too high temperature condition that needs the cooling that appears the battery package at the in-process to the charging of this battery package, the life-span of having damaged the battery, can increase unnecessary energy consumption again. The third temperature threshold may be greater than or equal to a fourth temperature threshold, where the fourth temperature threshold is a temperature suitable for performing high-power charging on the battery pack, and the fourth temperature threshold may be determined according to performance of the battery pack, or the fourth temperature threshold is set by a user, and both the third temperature threshold and the fourth temperature threshold are temperatures suitable for performing high-power charging on the battery pack, and the third temperature threshold and the fourth temperature threshold are different because of different charging powers of the external power supply. Optionally, if the second temperature of the battery pack is greater than the fourth temperature threshold, it indicates that the battery pack is in a high temperature state at this time, that is, it indicates that the charging power of the external power source has a corresponding relationship with the second temperature of the battery pack, that is, the second temperature of the battery pack reaches a temperature corresponding to the charging power of the external power source, that is, at the second temperature, continuous high-power charging of the battery pack can be achieved, and therefore, the external power source can be used to charge the battery pack, thereby achieving rapid charging of the battery pack. If the second temperature of the battery pack is lower than the third temperature threshold, it indicates that the battery pack is in a low temperature state, that is, the charging power of the external power supply does not have a corresponding relationship with the second temperature of the battery pack, that is, the battery pack cannot be rapidly charged at the second temperature, which indicates that the temperature of the battery pack still needs to be raised; specifically, the above steps of charging the first energy storage container and charging the battery pack may be continuously repeated.
And S206, charging the battery pack by adopting the external power supply.
In a possible implementation manner, if the first temperature of the battery pack does not need to be adjusted, it indicates that there is a corresponding relationship between the charging power of the external power source and the first temperature of the battery pack, that is, the first temperature of the battery pack reaches the temperature corresponding to the charging power of the external power source, that is, at the first temperature, the external power source may be used to charge the battery pack, so as to realize fast charging of the battery pack, shorten the charging time of the battery pack, and improve the charging efficiency.
And S207, acquiring the electric quantity of the battery pack and the third temperature of the battery pack.
In a possible implementation manner, during the process of charging the battery pack by using the external power supply, the electric quantity of the battery pack gradually increases, which may also result in a decrease in the temperature of the battery pack, at this time, the battery heating and charging device may obtain the electric quantity of the battery pack, and at the same time, the battery heating and charging device may also obtain a third temperature of the battery pack, where the third temperature is less than the first temperature, and the time for obtaining the first temperature is earlier than the time for obtaining the third temperature.
S208, if the electric quantity of the battery pack is greater than the first electric quantity threshold and the third temperature is less than the second temperature threshold, adjusting the third temperature of the battery pack to a fourth temperature, where the fourth temperature is greater than the third temperature threshold.
In one possible embodiment, the first charge threshold refers to a charge value at which the battery pack is about to be fully charged, for example, the first charge threshold may be 95%. If the electric quantity of the battery pack is greater than the first electric quantity threshold value and the third temperature is less than the second temperature threshold value, the battery pack is in a low-temperature state at the moment, namely, the charging power of the external power supply does not have a corresponding relation with the third temperature of the battery pack, namely, the battery pack cannot be rapidly charged at the third temperature; specifically, when the battery pack is to be fully charged, if the temperature of the battery pack is relatively low, the internal resistance of the battery is relatively large, so that the voltage of the battery is higher than the actual voltage value of the battery, and if the temperature of the battery pack is not raised, the battery pack is charged in advance, so that the battery pack is not fully charged. Therefore, it is necessary to raise the temperature of the battery pack at this time; the battery heating and charging device may adjust the third temperature of the battery pack to a fourth temperature; specifically, an external power source, a battery pack and a second energy storage container may be used to charge a first energy storage container, the external power source, the first energy storage container and the second energy storage container are used to charge the battery pack, and the above steps of charging the first energy storage container and charging the battery pack are repeated until the third temperature of the battery pack is adjusted to the fourth temperature.
The battery heating and charging device can obtain a fourth temperature of the battery pack, compare the fourth temperature with the third temperature threshold, if the fourth temperature of the battery pack is higher than the third temperature threshold, indicate that the battery pack is in a high-temperature state at the moment, that is, indicate that the charging power of the external power supply and the fourth temperature of the battery pack have a corresponding relationship, that is, the fourth temperature of the battery pack reaches a temperature corresponding to the charging power of the external power supply, that is, at the fourth temperature, the battery pack can be rapidly charged, at the moment, the repetition of the charging step for the first energy storage container and the charging step for the battery pack can be stopped, and the external power supply is used for charging the battery pack; if the fourth temperature of the battery pack is lower than the third temperature threshold, it indicates that the battery pack is in a low temperature state, that is, it indicates that the charging power of the external power supply does not have a corresponding relationship with the fourth temperature of the battery pack, that is, the fourth temperature of the battery pack does not reach the temperature corresponding to the charging power of the external power supply, that is, at the fourth temperature, the battery pack cannot be rapidly charged, and therefore, the temperature of the battery pack needs to be raised; specifically, the above steps of charging the first energy storage container and charging the battery pack may be repeated.
Optionally, the current of the battery pack and a fifth temperature of the battery pack are obtained; acquiring a third current threshold corresponding to the fifth temperature of the battery pack according to the corresponding relation between the temperature and the current threshold; if the current of the battery pack is larger than the third current threshold, the current of the battery pack is adjusted until the current of the battery pack is smaller than or equal to the third current threshold. The third current threshold may be a maximum allowed charging current or a maximum allowed discharging current of the battery pack at the fifth temperature of the battery pack, and may be used to ensure that irreversible damage to the battery pack is not caused. The battery heating and charging device may obtain a current of the battery pack and a fifth temperature of the battery pack. Specifically, the method for obtaining the third current threshold corresponding to the fifth temperature of the battery pack according to the corresponding relationship between the temperature and the current threshold may include, but is not limited to: acquiring a plurality of groups of corresponding relations between the temperature and the current threshold; determining a target correspondence between the fifth temperature of the battery pack and a third current threshold; and acquiring a third current threshold corresponding to the fifth temperature of the battery pack according to the target corresponding relation.
S209, the charging state of the battery pack is acquired.
In a possible embodiment, the battery pack may include at least one battery, and the charging state of the battery pack may be a voltage of the battery or a charge of the battery pack, where the battery is any one of the at least one battery in the battery pack.
Optionally, the method for acquiring the charging state of the battery pack may include, but is not limited to, the following steps:
step one, acquiring the voltage of the battery in the battery pack, wherein the battery is any one of the at least one battery.
And step two, if the voltage of the battery is larger than or equal to a voltage threshold value, determining that the charging state of the battery pack is in the saturation state.
Wherein the voltage threshold is a charge cut-off voltage of the battery.
Optionally, the method for acquiring the charging state of the battery pack may include, but is not limited to, the following steps:
step one, acquiring the electric quantity of the battery pack.
And step two, if the electric quantity of the battery pack is larger than a second electric quantity threshold value, determining that the charging state of the battery pack is in the saturation state.
The second threshold is a maximum charge value of the charging charge of the battery pack, for example, the third threshold may be 100%.
And S210, if the charging state is in a saturated state, suspending charging the battery pack.
In one possible embodiment, if the charging state is in a saturation state, indicating that the battery pack is fully charged, the charging of the battery pack may be suspended, and the battery pack may be prevented from being overcharged and the service life of the battery may be prevented from being damaged. If the charging state is not in the saturated state, it is indicated that the battery pack is not fully charged, the battery heating and charging device may obtain a sixth temperature of the battery pack, and if the sixth temperature of the battery pack is smaller than the second temperature threshold, it is indicated that the battery pack is in a low temperature state at this time, that is, it is indicated that the charging power of the external power supply does not have a corresponding relationship with the sixth temperature of the battery pack, that is, the sixth temperature of the battery pack does not reach a temperature corresponding to the charging power of the external power supply, that is, at the sixth temperature, it is not possible to rapidly charge the battery pack. Therefore, the temperature of the battery pack needs to be raised, and specifically, the above charging step of the first energy storage container and the charging step of the battery pack can be repeated; the battery heating and charging device can obtain a seventh temperature of the battery pack, compare the seventh temperature with the third temperature threshold, and if the seventh temperature of the battery pack is greater than the third temperature threshold, indicate that the battery pack is in a high-temperature state at the moment, that is, indicate that the charging power of the external power supply and the seventh temperature of the battery pack have a corresponding relationship, that is, the seventh temperature of the battery pack reaches a temperature corresponding to the charging power of the external power supply, that is, at the seventh temperature, the battery pack can be rapidly charged.
In this embodiment, if it is detected that the first temperature of the battery pack is greater than or equal to the first temperature threshold and the first temperature is less than the second temperature threshold, the charging power of the external power source may be obtained, and it is verified whether the first temperature of the battery pack needs to be adjusted according to the charging power of the external power source. If the first temperature of the battery pack needs to be adjusted, it is indicated that the first temperature does not belong to the charging power of the external power supply, and the temperature that the battery pack needs to reach when the external power supply is used for continuously charging the battery pack at high power cannot be achieved for rapidly charging the battery pack. Therefore, the first temperature of the battery pack needs to be adjusted to a second temperature, that is, the second temperature is a temperature at which the battery pack is continuously charged with high power by the external power supply under the charging power of the external power supply, and the battery pack is charged by the external power supply. Therefore, the first temperature of the battery pack is adjusted to reach the second temperature for continuously charging the battery pack at high power, and the battery pack is charged by adopting the external power supply, so that the battery pack is quickly charged, the charging time is shortened, the charging efficiency is improved, and the service life of the battery is prolonged.
Referring to fig. 3, fig. 3 is a schematic structural diagram of a battery heating and charging system according to an embodiment of the present disclosure. As shown in fig. 3, the battery heating and charging system includes an external power source 301, a first switch module 302, a first energy storage module 303, a second switch module 304, a second energy storage module 305, a battery pack 306 and a control module 307, wherein the external power source 301 is connected to the battery pack 306 through the first switch module 302, the second switch module 304 and the second energy storage module 305, the external power source 301 is connected to the first energy storage module 303 through the first switch module 302, the battery pack 306 is connected to the first energy storage module 303 in parallel, the battery pack 306 is connected to the second energy storage module 305 in series, a dotted line between the control module 307 and the external power source 301 indicates that the control module 307 can interact with the external power source 301, a dotted line between the control module 307 and the battery pack 306 indicates that the control module 307 can interact with the battery pack 306, and a dotted line between the control module 307 and the first switch module 302 indicates that the control module 307 can regulate and control the first switch module 303 In block 302, the dashed line between the control module 307 and the second switch module 304 indicates that the control module 307 can regulate the second switch module 304, wherein the first energy storage module 303 can include the first energy storage container and the second energy storage module 305 can include the second energy storage container.
The control module 307 may interact with the external power source 301 and the battery pack 306, and may include but is not limited to: the charging capability of the external power source 301, the charging voltage of the external power source 301, the temperature of the battery pack 306, the voltage of the battery in the battery pack 306, and the SOC value of the battery pack 306, wherein the battery pack 306 may include at least one battery, and the battery in the battery pack 306 is any one of the at least one battery in the battery pack 306. During the temperature raising process of the battery pack 306, the control module 307 may monitor the current of the battery pack 306 in real time, and monitor and obtain the temperature of the battery pack 306 in real time, for example, the control module 307 may obtain the temperature of the battery pack 306, determine a third current threshold corresponding to a fifth temperature of the battery pack 306 according to the fifth temperature of the battery pack 306, and adjust the current of the battery pack 306 according to the third current threshold, so as to ensure that irreversible damage to the battery pack 306 is not caused, where the third current threshold is a maximum allowable charging current or a maximum allowable discharging current corresponding to the fifth temperature of the battery pack 306. In the process of charging the battery pack 306 by using the external power supply 301, the control module 307 may interact with the external power supply 301 according to the specification corresponding to the battery pack 306, so as to ensure that the external power supply 301 charges the battery pack 306 according to the specification corresponding to the battery pack 306.
The control module 307 can regulate and control the first switch module 302 and the second switch module 304 to realize high-frequency switching among four stages, i.e., a first discharging stage, a second discharging stage, a first charging stage, and a second charging stage, and the control module 307 can regulate the current passing through the battery pack 306 in any one of the four stages. The first charging stage is to charge the first energy storage container by using the external power supply 301 and the battery pack 306 until the voltage of the first energy storage container is greater than or equal to the voltage of the external power supply 301, and enter a second discharging stage, where the first discharging stage corresponds to the battery pack 306 being in a discharging state; the second discharging phase is to disconnect the external power supply 301 from the system, where the system may include the battery pack 306 and the first energy storage container, so that the external power supply 301 stops replenishing the electric quantity to the battery pack 306 and the first energy storage container, and self-discharge is performed through the second energy storage container by using the battery pack 306 until the electric quantity obtained by the second energy storage container reaches the electric quantity upper limit value of the second energy storage container, and charge the first energy storage container by using the battery pack 306 and the second energy storage container until the current of the first energy storage container is smaller than the first current threshold, and enter the first charging phase, where the second discharging phase corresponds to the state where the battery pack 306 is discharged; the first charging stage is to charge the battery pack 306 by using the first energy storage container until the voltage of the first energy storage container is lower than the voltage of the external power supply 301, and enter a second charging stage, wherein the first charging stage corresponds to the battery pack 306 in a charging state; the second charging phase is to charge the battery pack 306 by using the external power supply 301 until the voltage of the external power supply 301 is less than the voltage of the battery pack 306, disconnect the external power supply 301 from the battery pack 306, and charge the battery pack 306 by using the second energy storage container until the current of the battery pack 306 is less than the second current threshold, where the second charging phase corresponds to the state of charge of the battery pack 306. The first current threshold and the second current threshold may be the same.
The external power source 301 may include, but is not limited to: charging post or battery carried by the vehicle. The first energy storage module 303 or the second energy storage module 305 may be a capacitive element, which may be an element with an output variable leading an input variable in phase, and/or an inductive element, which may be an element with an output variable lagging an input variable in phase.
The first switch module 302 and the second switch module 304 may include a plurality of sub-switching elements, and the first switch module 302 or the second switch module 304 may include, but is not limited to: the power semiconductor device comprises a relay, a diode and an Insulated Gate Bipolar Transistor (IGBT), wherein the IGBT is a composite fully-controlled voltage-driven power semiconductor device consisting of a Bipolar triode and an Insulated Gate field effect Transistor and has the characteristics of high input impedance and low conduction voltage drop. The first switch module 302 or the second switch module 304 may include a three-phase bridge arm formed by a plurality of IGBTs, and the control module 307 may adjust the direction and the current passing through the battery pack 306 by controlling the connection and disconnection of each sub-switch element in the first switch module 302 and the second switch module 304.
In the embodiment of the application, the first temperature of the battery pack is adjusted, the temperature of the battery pack can reach the second temperature for continuously charging the battery pack at high power, and then the external power supply is adopted to charge the battery pack, so that the battery pack is rapidly charged, the charging time is shortened, the charging efficiency is improved, and the service life of the battery is prolonged.
Referring to fig. 4, fig. 4 is a schematic structural diagram of a battery heating and charging device according to an embodiment of the present disclosure. As shown in fig. 4, the battery heating and charging apparatus 40 includes:
a first obtaining module 401, configured to obtain charging power of an external power source if it is detected that a first temperature of a battery pack is greater than or equal to a first temperature threshold and the first temperature is less than a second temperature threshold;
a verification module 402, configured to verify whether the first temperature of the battery pack needs to be adjusted according to the charging power of the external power source;
the first charging module 403 is configured to adjust the first temperature of the battery pack to a second temperature if the first temperature of the battery pack needs to be adjusted, and charge the battery pack using the external power supply, where the second temperature is greater than a third temperature threshold, and the third temperature threshold is greater than the second temperature threshold.
In a possible embodiment, the battery heating and charging device 40 further comprises:
a second charging module 404, configured to charge the battery pack with the external power supply if the first temperature of the battery pack does not need to be adjusted;
a second obtaining module 405, configured to obtain an electric quantity of the battery pack and a third temperature of the battery pack;
an adjusting module 406, configured to adjust the third temperature of the battery pack to a fourth temperature if the electric quantity of the battery pack is greater than a first electric quantity threshold and the third temperature is less than the second temperature threshold, where the fourth temperature is greater than the third temperature threshold.
In one possible implementation, the verification module 402 includes:
a first determining unit 4021, configured to determine that the first temperature of the battery pack does not need to be adjusted if the charging power of the external power source is less than or equal to a first power threshold;
a second determining unit 4022, configured to determine that the first temperature of the battery pack needs to be adjusted if the charging power of the external power source is greater than the first power threshold.
In a possible embodiment, the battery heating and charging device 40 further comprises:
a third obtaining module 410, configured to obtain a charging state of the battery pack;
the suspending module 411 is configured to suspend charging the battery pack if the charging state is in a saturation state.
In a possible implementation, the first charging module 403 includes:
a first charging unit 4031 configured to charge a first energy storage container with the external power supply, the battery pack, and a second energy storage container;
a second charging unit 4032, configured to charge the battery pack with the external power supply, the first energy storage container, and the second energy storage container;
an adjusting unit 4033, configured to repeat the charging step for the first energy storage container and the charging step for the battery pack until the first temperature of the battery pack is adjusted to the second temperature.
In a possible implementation, the first charging unit 4031 includes:
a first charging subunit 40311, configured to charge the first energy storage container with the external power supply and the battery pack until a voltage of the first energy storage container is greater than or equal to a voltage of the external power supply;
a second charging subunit 40312, configured to charge the first energy storage container with the battery pack and the second energy storage container until the current of the first energy storage container is smaller than a first current threshold, where the electric quantity of the second energy storage container is obtained by the battery pack.
In a possible implementation, the second charging unit 4032 includes:
a third charging subunit 40321, configured to charge the battery pack with the first energy storage container if the current of the first energy storage container is smaller than the first current threshold until the voltage of the first energy storage container is smaller than the voltage of the external power supply;
a fourth charging subunit 40322, configured to charge the battery pack with the external power source and the second energy storage container until a current of the battery pack is smaller than a second current threshold.
In one possible embodiment, the battery pack includes at least one battery;
for example, please refer to fig. 5a, wherein fig. 5a is a schematic structural diagram of a third obtaining module provided in the embodiment of the present application. As shown in fig. 5a, the third obtaining module 410 includes:
a first obtaining unit 501, configured to obtain a voltage of the battery in the battery pack, where the battery is any one of the at least one battery;
a third determining unit 502, configured to determine that the charging state of the battery pack is in the saturation state if the voltage of the battery is greater than or equal to a voltage threshold.
In a possible implementation manner, for example, please refer to fig. 5b, and fig. 5b is a schematic structural diagram of another third obtaining module provided in an embodiment of the present application. As shown in fig. 5b, the third obtaining module 410 includes:
a second obtaining unit 503, configured to obtain an electric quantity of the battery pack;
a fourth determining unit 504, configured to determine that the state of charge of the battery pack is in the saturation state when the power of the battery pack is greater than the second power threshold.
In a possible embodiment, the battery heating and charging device 40 further comprises:
a fourth obtaining module 407, configured to obtain a current of the battery pack and a fifth temperature of the battery pack;
a fifth obtaining module 408, configured to obtain a third current threshold corresponding to the fifth temperature of the battery pack according to a corresponding relationship between the temperature and the current threshold;
the adjusting module 409 is configured to adjust the current of the battery pack if the current of the battery pack is greater than the third current threshold until the current of the battery pack is less than or equal to the third current threshold.
It should be noted that, for the content that is not mentioned in the embodiment corresponding to fig. 4, reference may be made to the description of the method embodiment in fig. 1 and/or fig. 2, and details are not repeated here.
In this embodiment, if it is detected that the first temperature of the battery pack is greater than or equal to a first temperature threshold and the first temperature is less than a second temperature threshold, the charging power of the external power source may be obtained, and it is verified whether the first temperature of the battery pack needs to be adjusted according to the charging power of the external power source. If the first temperature of the battery pack needs to be adjusted, it is indicated that the first temperature does not belong to the charging power of the external power supply, and the temperature of the battery pack is required to reach when the external power supply is used for continuously charging the battery pack at high power, so that the battery pack cannot be rapidly charged. Therefore, the first temperature of the battery pack needs to be adjusted to a second temperature, that is, the second temperature is a temperature at which the battery pack is continuously charged with high power by the external power supply under the charging power of the external power supply, and the battery pack is charged by the external power supply. Therefore, the first temperature of the battery pack is adjusted to reach the second temperature for continuously charging the battery pack at high power, and the external power supply is adopted to charge the battery pack, so that the battery pack is rapidly charged, the charging time is shortened, the charging efficiency is improved, and the service life of the battery is prolonged.
Referring to fig. 6, fig. 6 is a schematic structural diagram of a battery heating and charging apparatus 60 according to an embodiment of the present disclosure, where the battery heating and charging apparatus includes a processor 601, a memory 602, an input/output interface 603, and a communication bus 604. The processor 601 is connected to the memory 602 and the input output interface 603, for example, the processor 601 may be connected to the memory 602 and the input output interface 603 through a communication bus 604.
The processor 601 is configured to support the battery heating and charging apparatus to perform corresponding functions in the battery heating and charging methods of fig. 1-2. The Processor 601 may be a Central Processing Unit (CPU), a Network Processor (NP), a hardware chip, or any combination thereof. The hardware chip may be an Application-Specific Integrated Circuit (ASIC), a Programmable Logic Device (PLD), or a combination thereof. The PLD may be a Complex Programmable Logic Device (CPLD), a Field-Programmable Gate Array (FPGA), General Array Logic (GAL), or any combination thereof.
The memory 602 is used for storing program codes and the like. The Memory 602 may include Volatile Memory (VM), such as Random Access Memory (RAM); the Memory 602 may also include a Non-Volatile Memory (NVM), such as a Read-Only Memory (ROM), a flash Memory (flash Memory), a Hard Disk (Hard Disk Drive, HDD) or a Solid-State Drive (SSD); the memory 602 may also comprise a combination of memories of the kind described above.
The input/output interface 603 is used for inputting or outputting data.
The processor 601 may call the program code to perform the following operations:
if the first temperature of the battery pack is detected to be greater than or equal to a first temperature threshold value and the first temperature is smaller than a second temperature threshold value, acquiring the charging power of an external power supply;
verifying whether the first temperature of the battery pack needs to be adjusted according to the charging power of the external power supply;
if the first temperature of the battery pack needs to be adjusted, the first temperature of the battery pack is adjusted to a second temperature, the battery pack is charged by the external power supply, the second temperature is greater than a third temperature threshold, and the third temperature threshold is greater than the second temperature threshold.
It should be noted that, the implementation of each operation may also correspond to the corresponding description of the method embodiment shown in fig. 1 and/or fig. 2; the processor 601 may also cooperate with the input output interface 603 to perform other operations in the above-described method embodiments.
Embodiments of the present application also provide a computer-readable storage medium storing a computer program comprising program instructions which, when executed by a computer, cause the computer to perform the method according to the aforementioned embodiments, the computer may be a part of the aforementioned battery heating and charging apparatus. Such as the processor 601 described above.
The terms "first," "second," "third," and "fourth," etc. in the description and claims of this application and the above-described drawings are used for distinguishing between different objects and not for describing a particular order. Furthermore, the terms "include" and "have," as well as any variations thereof, are intended to cover a non-exclusive inclusion. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those steps or elements recited, but may alternatively include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
In the present application, "a and/or B" means one of the following cases: a, B, A and B. "at least one of … …" refers to any combination of the listed items or any number of the listed items, e.g., "at least one of A, B and C" refers to one of the following: any one of seven cases A, B, C, A and B, B and C, A and C, A, B and C.
It will be understood by those skilled in the art that all or part of the processes of the methods of the embodiments described above can be implemented by a computer program, which can be stored in a computer-readable storage medium, and when executed, can include the processes of the embodiments of the methods described above. The storage medium may be a magnetic disk, an optical disk, a Read-only Memory (ROM), a Random Access Memory (RAM), or the like.
The above disclosure is only for the purpose of illustrating the preferred embodiments of the present application and is not to be construed as limiting the scope of the present application, so that the present application is not limited thereto, and all equivalent variations and modifications can be made to the present application.

Claims (10)

1. A method of heating and charging a battery, comprising:
if the first temperature of the battery pack is detected to be greater than or equal to a first temperature threshold value and is smaller than a second temperature threshold value, acquiring the charging power of an external power supply, wherein the first temperature greater than or equal to the first temperature threshold value and smaller than the second temperature threshold value is used for indicating that the external power supply can be directly used for charging the battery pack currently;
verifying whether the first temperature of the battery pack needs to be adjusted or not according to the charging power of the external power supply, wherein each charging power has a corresponding relationship with the temperature, and the temperature corresponding to each charging power is the temperature for realizing rapid charging of the battery pack under each charging power;
if the first temperature of the battery pack needs to be adjusted, the first temperature of the battery pack is adjusted to a second temperature, the battery pack is charged by the external power supply, the second temperature is greater than a third temperature threshold, the third temperature threshold is greater than the second temperature threshold, and the second temperature and the charging power of the external power supply have a corresponding relation.
2. The method of claim 1, further comprising:
if the first temperature of the battery pack does not need to be adjusted, the external power supply is adopted to charge the battery pack;
acquiring the electric quantity of the battery pack and a third temperature of the battery pack, wherein the third temperature is the temperature of the battery pack in the process of charging the battery pack by using the external power supply;
if the electric quantity of the battery pack is larger than a first electric quantity threshold value and the third temperature is smaller than a second temperature threshold value, adjusting the third temperature of the battery pack to a fourth temperature, wherein the fourth temperature is larger than the third temperature threshold value.
3. The method of claim 1 or 2, wherein verifying whether the first temperature of the battery pack needs to be adjusted according to the charging power of the external power source comprises:
determining that the first temperature of the battery pack does not need to be adjusted if the charging power of the external power source is less than or equal to a first power threshold;
determining that the first temperature of the battery pack needs to be adjusted if the charging power of the external power source is greater than the first power threshold.
4. The method of claim 1, further comprising:
acquiring the charging state of the battery pack;
and if the charging state is in a saturated state, the battery pack is suspended from being charged.
5. The method of claim 1, wherein the adjusting the first temperature of the battery pack to a second temperature comprises:
charging a first energy storage container by adopting the external power supply, the battery pack and a second energy storage container;
charging the battery pack by using the external power supply, the first energy storage container and the second energy storage container;
and repeating the charging step of the first energy storage container and the charging step of the battery pack until the first temperature of the battery pack is adjusted to the second temperature.
6. The method of claim 5, wherein charging a first energy storage container with the external power source, the battery pack, and a second energy storage container comprises:
charging the first energy storage container by using the external power supply and the battery pack until the voltage of the first energy storage container is greater than or equal to the voltage of the external power supply;
and charging the first energy storage container by adopting the battery pack and the second energy storage container until the current of the first energy storage container is smaller than a first current threshold value, and acquiring the electric quantity of the second energy storage container through the battery pack.
7. The method of claim 6, wherein charging the battery pack with the external power source, the first energy storage container, and the second energy storage container comprises:
if the current of the first energy storage container is smaller than the first current threshold, the first energy storage container is adopted to charge the battery pack until the voltage of the first energy storage container is smaller than the voltage of the external power supply;
and charging the battery pack by adopting the external power supply and the second energy storage container until the current of the battery pack is smaller than a second current threshold value.
8. A battery heating and charging apparatus, comprising:
the battery pack charging method includes the steps that a first obtaining module is used for obtaining charging power of an external power supply if it is detected that a first temperature of a battery pack is larger than or equal to a first temperature threshold and the first temperature is smaller than a second temperature threshold, wherein the first temperature larger than or equal to the first temperature threshold and smaller than the second temperature threshold is used for indicating that the external power supply can be directly used for charging the battery pack currently;
the verification module is used for verifying whether the first temperature of the battery pack needs to be adjusted or not according to the charging power of the external power supply, wherein a corresponding relation exists between each charging power and the temperature, and the temperature corresponding to each charging power is the temperature for realizing quick charging of the battery pack under each charging power;
the first charging module is used for adjusting the first temperature of the battery pack to a second temperature if the first temperature of the battery pack needs to be adjusted, the battery pack is charged by the external power supply, the second temperature is greater than a third temperature threshold value, the third temperature threshold value is greater than the second temperature threshold value, and the second temperature corresponds to the charging power of the external power supply.
9. A battery heating and charging apparatus comprising a processor, a memory and an input-output interface, the processor, the memory and the input-output interface being interconnected, wherein the input-output interface is used for inputting or outputting data, the memory is used for storing program code, and the processor is used for calling the program code to execute the method according to any one of claims 1-7.
10. A computer-readable storage medium, characterized in that the computer-readable storage medium stores a computer program comprising program instructions that, when executed by a processor, cause the processor to carry out the method according to any one of claims 1-7.
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