A charging method, device and computer readable storage medium

Abstract

The embodiment of the present invention provides a charging method, device and computer-readable storage medium. The method includes: the BMS obtains the i-th charging temperature of the charging socket during the charging process, i is a positive integer, determines the charging demand current corresponding to the i-th charging temperature according to the i-th charging temperature, and the BMS charges the battery according to the charging demand current. During the charging process, by obtaining multiple charging temperatures and multiple charging demand currents of the charging socket, the battery is charged according to the corresponding relationship between the charging temperature and the charging demand current, thereby reducing the rate of increase of the charging temperature, improving the charging efficiency, and enhancing the user experience.

Description

[Technical field]

[0001] Embodiments of the present invention relate to the field of charging technology, and in particular, to a charging method, device, and computer-readable storage medium. [Background technology]

[0002] With the rapid development of electric vehicles, people's requirements for electric vehicle charging functions are getting higher and higher. The charging of electric vehicles is inseparable from the use of charging sockets and charging guns, but with the increase in the number of consecutive charging times and charging time, the charging temperature will increase. Especially for high-current DC charging, in order to monitor the socket temperature in real time during charging, a temperature sensor will be set at the positive pole (DC+) and negative pole (DC-) of the high-voltage DC terminal of the charging socket. Since the positive and negative poles of the high-voltage DC terminal constitute the DC charging circuit and have a large continuous current capacity, they are prone to failure, so real-time detection of the charging temperature will be related to the safety of electric vehicle charging.

[0003] At present, the over-temperature protection measures for charging sockets are relatively simple. Due to insufficient maintenance or an increase in the number of consecutive charging times and charging time, the charging gun head or charging socket may be partially damaged, the terminal may be deformed, corroded or burned, etc., which may reduce the terminal contact area or increase the equivalent resistance, which may easily lead to a rise in charging temperature; or, the charging pile has its own liquid cooling system, but when the liquid cooling system fails, it will cause the charging temperature to rise rapidly. Therefore, the current charging method cannot effectively suppress the increase in charging temperature, and eventually triggers an over-temperature fault, resulting in a decrease in charging efficiency and a poor user experience. [Summary of the invention]

[0004] In view of this, an embodiment of the present invention provides a charging method, device and computer-readable storage medium, which are used to reduce the rate of increase of charging temperature, improve charging efficiency and enhance user experience during the charging process.

[0005] In a first aspect, an embodiment of the present invention provides a charging method, the method comprising:

[0006] Get the i-th charging temperature of the charging socket during the charging process, where i is a positive integer;

[0007] Determining, according to the i-th charging temperature, a charging demand current corresponding to the i-th charging temperature;

[0008] The battery is charged according to the charging demand current.

[0009] Optionally, after charging the battery according to the charging demand current, the method further includes:

[0010] Get the current battery power after the battery is charged and the i+1th charging temperature of the charging socket during the charging process;

[0011] Determine whether the current battery power is less than or equal to the power at the end of charging;

[0012] If it is determined that the current battery power is less than the power at the end of charging, the (i+1)th charging temperature is used as the i-th charging temperature, and the step of determining the charging demand current corresponding to the i-th charging temperature according to the i-th charging temperature is performed;

[0013] If it is determined that the current battery power is equal to the power at the end of charging, charging is terminated.

[0014] Optionally, determining, according to the i-th charging temperature, a charging demand current corresponding to the i-th charging temperature includes:

[0015] If it is determined that the i-th charging temperature is less than or equal to the j-th temperature threshold, it is determined that the charging demand current corresponding to the i-th charging temperature is the j-th charging demand current, wherein the value range of j is 1 to N, N is a positive integer, the j-th charging demand current is the sum of the j-th battery current and the j-th load current, and the j-th battery current is the product of the maximum allowable charging current of the battery and the j-th percentage;

[0016] If it is determined that the i-th charging temperature is greater than the j-th temperature threshold, determining whether the sequence number of the j-th temperature threshold is less than or equal to N;

[0017] If it is determined that the sequence number of the j-th temperature threshold is less than N, determining whether the i-th charging temperature is less than or equal to the j+1-th temperature threshold;

[0018] If it is determined that the i-th charging temperature is less than or equal to the j+1-th temperature threshold, it is determined that the charging demand current corresponding to the i-th charging temperature is the j+1-th charging demand current, wherein the j+1-th charging demand current is the sum of the j+1-th battery current and the j+1-th load current, the j+1-th battery current is the product of the maximum allowable charging current of the battery and the j+1-th percentage, and the j-th temperature threshold is less than the j+1-th temperature threshold.

[0019] Optionally, it also includes:

[0020] If it is determined that the i-th charging temperature is greater than the j+1-th temperature threshold, the j+1-th temperature threshold is used as the j-th temperature threshold, and the step of determining whether the sequence number of the j-th temperature threshold is less than or equal to N is performed.

[0021] Optionally, it also includes:

[0022] If it is determined that the serial number of the j-th temperature threshold is equal to N, a first guidance instruction is sent to the telematics processor T-BOX, so that the T-BOX sends guidance information to the user in response to the first guidance instruction;

[0023] End charging.

[0024] Optionally, when i is 1, before acquiring the i-th charging temperature of the charging socket during the charging process, the method further includes:

[0025] Obtain the initial temperature of the charging socket and the temperature rise rate of the charging socket during charging;

[0026] Determining whether the initial temperature is less than or equal to an initial temperature threshold and determining whether the temperature rise rate is less than or equal to a temperature rise threshold;

[0027] If it is determined that the initial temperature is less than or equal to the initial temperature threshold and the temperature rise rate is determined to be less than or equal to the temperature rise threshold, the first charging temperature of the charging socket during the charging process is acquired.

[0028] Optionally, it also includes:

[0029] If it is determined that the initial temperature is greater than the initial temperature threshold or the temperature rise rate is greater than the temperature rise threshold, a second guidance instruction is sent to the T-BOX, so that the T-BOX sends guidance information to the user in response to the second guidance instruction;

[0030] End charging.

[0031] In a second aspect, an embodiment of the present invention provides a charging device, the device comprising:

[0032] An acquisition module is used to acquire the i-th charging temperature of the charging socket during the charging process, where i is a positive integer;

[0033] a determination module, configured to determine a charging demand current corresponding to the i-th charging temperature according to the i-th charging temperature;

[0034] The charging module is used to charge the battery according to the charging demand current.

[0035] In a third aspect, an embodiment of the present invention provides a computer-readable storage medium, wherein the computer-readable storage medium includes a stored program, wherein when the program is running, the device where the computer-readable storage medium is located is controlled to execute the charging method in the first aspect or any possible implementation of the first aspect.

[0036] In a fourth aspect, an embodiment of the present invention provides a battery management system BMS, comprising: one or more processors; a memory; and one or more computer programs, wherein the one or more computer programs are stored in the memory, and the one or more computer programs include instructions, which, when executed by the device, enable the device to execute the charging method in the first aspect or any possible implementation of the first aspect.

[0037] In the technical solution provided by the embodiment of the present invention, the BMS obtains the i-th charging temperature of the charging socket during the charging process, where i is a positive integer, and determines the charging demand current corresponding to the i-th charging temperature based on the i-th charging temperature. The BMS charges the battery based on the charging demand current. During the charging process, by obtaining multiple charging temperatures and multiple charging demand currents of the charging socket, the battery is charged based on the correspondence between the charging temperature and the charging demand current, thereby reducing the rate of increase of the charging temperature, improving the charging efficiency, and enhancing the user experience.

Brief Description of the Drawings

[0038] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0039] Figure 1 A flowchart of a charging method provided by an embodiment of the present invention;

[0040] Figure 2 A flow chart of a charging detection method provided by an embodiment of the present invention;

[0041] Figure 3 A flow chart of a method for obtaining charging demand current provided by an embodiment of the present invention;

[0042] Figure 4 A flowchart of another charging method provided by an embodiment of the present invention;

[0043] Figure 5 A schematic diagram of a flow reduction percentage provided by an embodiment of the present invention;

[0044] Figure 6 A schematic diagram of the structure of a charging device provided by an embodiment of the present invention;

[0045] Figure 7 A schematic diagram of a BMS provided in an embodiment of the present invention. [Specific implementation method]

[0046] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0047] It should be clear that the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0048] The terms used in the embodiments of the present invention are only for the purpose of describing specific embodiments, and are not intended to limit the present invention. The singular forms "a", "said" and "the" used in the embodiments of the present invention and the appended claims are also intended to include plural forms, unless the context clearly indicates other meanings.

[0049] It should be understood that the term "and / or" used in this article is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0050] The word "if" as used herein may be interpreted as "at the time of" or "when" or "in response to determining" or "in response to detecting", depending on the context. Similarly, the phrases "if it is determined" or "if (stated condition or event) is detected" may be interpreted as "when it is determined" or "in response to determining" or "when detecting (stated condition or event)" or "in response to detecting (stated condition or event)", depending on the context.

[0051] Figure 1 A flowchart of a charging method provided by an embodiment of the present invention is shown in FIG. Figure 1 As shown, the method includes:

[0052] Step 101: The BMS obtains the i-th charging temperature of the charging socket during the charging process, where i is a positive integer.

[0053] The battery management system (BMS) obtains the i-th charging temperature of the charging socket during the charging process through temperature sensors arranged at the positive and negative ends of the high-voltage DC terminals of the charging socket. i is a positive integer, for example, i=1, 2, ...M.

[0054] Figure 2 A flow chart of a charging detection method provided by an embodiment of the present invention is as follows: Figure 2 As shown, before step 102, the following steps are also included:

[0055] Step 201: The BMS obtains the initial temperature of the charging socket and the temperature rise rate of the charging socket during the charging process.

[0056] In the embodiment of the present invention, when i is 1, before the BMS obtains the first charging temperature of the charging socket during the charging process, the BMS obtains the initial temperature of the charging socket and the temperature rise rate of the charging socket during the charging process through the temperature sensor.

[0057] Step 202 , the BMS determines whether the initial temperature is less than or equal to the initial temperature threshold and determines whether the temperature rise rate is less than or equal to the temperature rise threshold. If so, execute step 203 ; if not, execute step 204 .

[0058] If the BMS determines that the initial temperature is less than or equal to the initial temperature threshold and that the temperature rise rate is less than or equal to the temperature rise threshold, it indicates that the battery can be continuously charged, and step 203 is executed; if the BMS determines that the initial temperature is greater than the initial temperature threshold or that the temperature rise rate is greater than the temperature rise threshold, it indicates that the charging is abnormal at this time and the battery cannot be continuously charged, and step 204 is executed. For example, the initial temperature threshold is 75 degrees, the temperature rise threshold is 4 degrees / minute (℃ / min), the initial temperature is 30 degrees, and the temperature rise rate is 1 degree / minute. At this time, the initial temperature is less than the initial temperature threshold and the temperature rise rate is less than the temperature rise threshold, indicating that the battery can be continuously charged, and step 203 is executed; the initial temperature is 80 degrees, and the temperature rise rate is 1 degree / minute. At this time, the initial temperature is greater than the initial temperature threshold and the temperature rise rate is less than the temperature rise threshold, indicating that the charging is abnormal at this time and the battery cannot be continuously charged, and step 204 is executed; the initial temperature is 30 degrees, and the temperature rise rate is 6 degrees / minute. At this time, the initial temperature is less than the initial temperature threshold and the temperature rise rate is greater than the temperature rise threshold, indicating that the charging is abnormal at this time and the battery cannot be continuously charged, and step 204 is executed; the initial temperature is 80 degrees, and the temperature rise rate is 6 degrees / minute. At this time, the initial temperature is greater than the initial temperature threshold and the temperature rise rate is greater than the temperature rise threshold, indicating that the charging is abnormal at this time and the battery cannot be continuously charged, and step 204 is executed.

[0059] Step 203: The BMS obtains the first charging temperature of the charging socket during the charging process.

[0060] When the BMS determines that the initial temperature is less than or equal to the initial temperature threshold and the temperature rise rate is less than or equal to the temperature rise threshold, it indicates that the battery can be continuously charged. At this time, the BMS obtains the first charging temperature of the charging socket during the charging process. For example, the initial temperature threshold is 75 degrees, the temperature rise threshold is 4 degrees / minute, the initial temperature is 30 degrees, and the temperature rise rate is 1 degree / minute. At this time, the initial temperature is less than the initial temperature threshold and the temperature rise rate is less than the temperature rise threshold, indicating that the battery can be continuously charged, and the BMS obtains the first charging temperature of the charging socket during the charging process.

[0061] Step 204: The BMS sends a second guidance instruction to the T-BOX, so that the T-BOX sends guidance information to the user in response to the second guidance instruction.

[0062] When the BMS determines that the initial temperature is greater than the initial temperature threshold or that the temperature rise rate is greater than the temperature rise threshold, indicating that the charging is abnormal at this time and the battery cannot be continuously charged, the BMS sends a second guidance instruction to the telematics BOX (T-BOX), so that the T-BOX can respond to the second guidance instruction and send guidance information to the user through the remote monitoring platform, wherein the second guidance instruction is an initial temperature abnormality instruction or a temperature rise rate abnormality instruction; the guidance information is in the form of a text message or a charging software reminder. For example, the BMS sends a temperature abnormality instruction or a temperature rise rate abnormality instruction to the T-BOX, so that the T-BOX can respond to the temperature abnormality instruction or the temperature rise rate abnormality instruction and send a reminder to the user's terminal device through the remote monitoring platform, and the terminal device receives the reminder through the installed charging software. For example, the reminders include: a) The socket temperature is abnormal during the charging process. After charging is completed, observe whether there are foreign objects in the charging interface, whether the charging gun head is damaged, whether the terminal is deformed, corroded, or burned, etc.; b) Confirm whether the charging pile has a high temperature of the charging gun head due to continuous charging. Continuous charging may cause the high temperature of the charging interface to affect normal charging; c) If the above two steps are normal, please change the pile for charging; d) If the socket overheating problem still exists after changing the pile, please contact the 4S store for processing.

[0063] In the embodiment of the present invention, the terminal device includes but is not limited to a mobile phone, a tablet computer, a portable PC, a desktop computer, etc.

[0064] Step 205: BMS ends charging.

[0065] When the BMS determines that the initial temperature is greater than the initial temperature threshold or that the temperature rise rate is greater than the temperature rise threshold, it indicates that charging is abnormal and the battery cannot be continuously charged, and the BMS terminates charging.

[0066] It should be noted that: for example, step 204 may also be performed after step 205, or step 204 may also be performed simultaneously with step 205.

[0067] In the technical solution of the charging detection method provided in the embodiment of the present invention, the BMS obtains the initial temperature of the charging socket and the temperature rise rate of the charging socket during the charging process. When the BMS determines that the initial temperature is less than or equal to the initial temperature threshold and that the temperature rise rate is less than or equal to the temperature rise threshold, the BMS obtains the first charging temperature of the charging socket during the charging process; when the BMS determines that the initial temperature is greater than the initial temperature threshold or that the temperature rise rate is greater than the temperature rise threshold, the BMS sends a second guidance instruction to the T-BOX, so that the T-BOX sends guidance information to the user in response to the second guidance instruction, and the BMS ends charging. In the embodiment of the present invention, by monitoring the initial temperature and the temperature rise rate, when charging abnormality occurs, charging can be ended, thereby reducing the probability of charging failure caused by overheating of the socket, and effectively ensuring the safety of continuous charging of the battery.

[0068] Step 102: The BMS determines a charging demand current corresponding to the ith charging temperature according to the ith charging temperature.

[0069] For example, when i is 1, the charging demand current is 200 amperes (Ampere, A). Based on the first charging temperature, the BMS determines that the charging demand current corresponding to the first charging temperature is -190A. The charging demand current is the sum of the battery current and the load current. For example, when the battery current is -200A and the load current is 10A, the sum of the battery current and the load current is -190A, that is, the charging demand current is -190A. The load current is the quotient of the load power consumption and the total battery voltage. For example, when the load power consumption is 2000 watts (Watt, W) and the total battery voltage is 400 volts (Volt, V), the quotient of the load power consumption and the total battery voltage is 5A, that is, the load current is 5A.

[0070] In the embodiment of the present invention, the load power consumption is the sum of the power of the electric heating device (Positive Temperature Coefficient, PTC), the power of the compressor control unit (Compressor Control Unit, CCU) and the power of the direct current-direct current converter (Direct current converter, DCDC).

[0071] Step 103: The BMS charges the battery according to the charging demand current.

[0072] The BMS obtains the battery current according to the charging demand current and charges the battery according to the battery current.

[0073] Step 104 : The BMS obtains the current battery power after the battery is charged and the (i+1)th charging temperature of the charging socket during the charging process.

[0074] The BMS obtains the current battery power after the battery is charged and obtains the i+1th charging temperature of the charging socket during the charging process through the temperature sensor.

[0075] Step 105 , the BMS determines whether the current battery power is less than or equal to the power at the end of charging. If so, execute step 106 ; if so, execute step 107 .

[0076] If the BMS determines that the current battery power is less than the power at the end of charging, it indicates that the battery should continue to be charged, and step 106 is executed; if the BMS determines that the current battery power is equal to the power at the end of charging, it indicates that the battery should be terminated, and step 107 is executed. For example, the power at the end of charging is 100%, and the current battery power is 80%. At this time, the current battery power is less than the power at the end of charging, indicating that the battery should continue to be charged, and step 106 is executed; the current power is 100%, and at this time, the current battery power is equal to the power at the end of charging, indicating that the battery should be terminated, and step 107 is executed.

[0077] Step 106 : The BMS takes the (i+1)th charging temperature as the (i)th charging temperature and executes step 102 .

[0078] When the BMS determines that the current battery power is less than the power at the end of charging, it indicates that the battery should continue to be charged. At this time, the BMS uses the i+1th charging temperature as the ith charging temperature and executes step 102. For example, when i is 1, the power at the end of charging is 100%, and the current battery power is 80%. At this time, the current battery power is less than the power at the end of charging, indicating that the battery should continue to be charged. At this time, the BMS uses the second charging temperature as the ith charging temperature, and executes the step of determining the charging demand current corresponding to the second charging temperature according to the second charging temperature.

[0079] Step 107: BMS ends charging.

[0080] When the BMS determines that the current battery power is equal to the power at the end of charging, it indicates that the battery charging should be terminated. At this time, the BMS ends the charging.

[0081] Figure 3 A flow chart of a method for obtaining a charging demand current provided by an embodiment of the present invention, such as Figure 3 As shown, step 102 may specifically include:

[0082] Step S11, the BMS determines whether the i-th charging temperature is less than or equal to the j-th temperature threshold, if so, executes step S12; if not, executes step S13.

[0083] If the BMS determines that the i-th charging temperature is less than or equal to the j-th temperature threshold, it indicates that the comparison result of the i-th charging temperature and the j-th temperature threshold does not have a problem of over-charging, and then executes step S12; if the BMS determines that the i-th charging temperature is greater than the j-th temperature threshold, it indicates that the comparison result of the i-th charging temperature and the j-th temperature threshold has a problem of over-charging, and then executes step S13. For example, the j-th temperature threshold is 95 degrees, and the i-th charging temperature is 80 degrees. At this time, the i-th charging temperature is less than the j-th temperature threshold, indicating that the comparison result of the i-th charging temperature and the j-th temperature threshold does not have a problem of over-charging, and then executes step S12; the i-th charging temperature is 105 degrees, at this time, the i-th charging temperature is greater than the j-th temperature threshold, indicating that the comparison result of the i-th charging temperature and the j-th temperature threshold has a problem of over-charging, and then executes step S13.

[0084] Step S12: The BMS determines that the charging demand current corresponding to the i-th charging temperature is the j-th charging demand current.

[0085] When the BMS determines that the i-th charging temperature is less than or equal to the j-th temperature threshold, it indicates that the comparison result of the i-th charging temperature and the j-th temperature threshold does not have the problem of over-charging, and the BMS determines that the charging demand current corresponding to the i-th charging temperature is the j-th charging demand current. For example, the j-th temperature threshold is 95 degrees, and the i-th charging temperature is 80 degrees. At this time, the i-th charging temperature is less than the j-th temperature threshold, indicating that the comparison result of the i-th charging temperature and the j-th temperature threshold does not have the problem of over-charging, and the BMS determines that the charging demand current corresponding to the i-th charging temperature is the j-th charging demand current. Among them, the value range of j is 1 to N, N is a positive integer, the j-th charging demand current is the sum of the j-th battery current and the j-th load current, and the j-th battery current is the product of the maximum allowable charging current of the battery and the j-th percentage. For example, when j is 2, the second charging demand current is the sum of the second battery current and the second load current, and the second battery current is the product of the maximum allowable charging current of the battery and the second percentage. The second battery current is -180A, and the second load current is 20A, then the sum of the second battery current and the second load current is -160A, that is, the second charging demand current is -160A; the maximum allowable charging current of the battery is -240A, and the second percentage is 75%, then the product of the maximum allowable charging current of the battery and the second percentage is -180A, that is, the second battery current is -180A.

[0086] In the embodiment of the present invention, the maximum allowable charging current of the battery is obtained through the current single cell voltage and single cell temperature, and the BMS can query the maximum allowable charging current of the battery through the corresponding relationship between the single cell voltage and the single cell temperature of the battery cell. When the charging temperature is over-temperature, the BMS will limit the operation of the high-voltage load while reducing the charging demand current, such as reducing the air conditioner, defroster, heater, etc., but ensuring the normal operation of the DCDC. In the embodiment of the present invention, by reducing the high-voltage load, the power consumption of the high-voltage load will be reduced, and then the current consumption of the high-voltage load will be reduced, and finally the demand of the BMS for the charging demand current of the charging pile will be reduced. By reducing the demand for the charging demand current, the increase of the charging temperature during the charging process is effectively suppressed, thereby improving the charging efficiency.

[0087] Step S13, the BMS determines whether the serial number of the j-th temperature threshold is less than or equal to N, if so, executes step S14; if equal, executes step S17.

[0088] When the BMS determines that the i-th charging temperature is greater than the j-th temperature threshold, it indicates that the comparison result between the i-th charging temperature and the j-th temperature threshold has a problem of over-charging, and the BMS determines whether the serial number of the j-th temperature threshold is less than or equal to N; if the BMS determines that the serial number of the j-th temperature threshold is less than N, it indicates that the charging demand current can continue to be reduced, and step S14 is executed; if the BMS determines that the serial number of the j-th temperature threshold is equal to N, it indicates that the charging demand current needs to be terminated, and step S17 is executed. For example, N is 4, and the serial number of the j-th temperature threshold is 2. At this time, the serial number of the j-th temperature threshold is less than N, indicating that the charging demand current can continue to be reduced, and step S14 is executed; the serial number of the j-th temperature threshold is 4. At this time, the serial number of the j-th temperature threshold is equal to N, indicating that the charging demand current needs to be terminated, and step S17 is executed.

[0089] Step S14, the BMS determines whether the i-th charging temperature is less than or equal to the j+1-th temperature threshold. If so, execute step S15; if not, execute step S16.

[0090] When the BMS determines that the sequence number of the j-th temperature threshold is less than N, it indicates that the charging demand current can continue to be reduced, and the BMS determines whether the ith charging temperature is less than or equal to the j+1-th temperature threshold; if the BMS determines that the ith charging temperature is less than or equal to the j+1-th temperature threshold, it indicates that the comparison result of the ith charging temperature and the j+1-th temperature threshold does not have a charging overtemperature problem, and step S15 is executed; if the BMS determines that the ith charging temperature is greater than the j+1-th temperature threshold, it indicates that the comparison result of the ith charging temperature and the j+1-th temperature threshold does not have a charging overtemperature problem, and step S16 is executed. For example, the j+1th temperature threshold is 100 degrees, and the i-th charging temperature is 80 degrees. At this time, the i-th charging temperature is less than the j+1th temperature threshold, indicating that the comparison result of the i-th charging temperature and the j+1th temperature threshold does not have a problem of over-charging, and then execute step S15; the i-th charging temperature is 105 degrees. At this time, the i-th charging temperature is greater than the j+1th temperature threshold, indicating that the comparison result of the i-th charging temperature and the j+1th temperature threshold does not have a problem of over-charging, and then execute step S16.

[0091] Step S15: The BMS determines that the charging demand current corresponding to the i-th charging temperature is the j+1-th charging demand current.

[0092] When the BMS determines that the i-th charging temperature is less than or equal to the j+1-th temperature threshold, it indicates that the comparison result of the i-th charging temperature and the j+1-th temperature threshold does not have a problem of over-charging, and the BMS determines that the charging demand current corresponding to the i-th charging temperature is the j+1-th charging demand current. The j+1-th temperature threshold is 100 degrees, and the i-th charging temperature is 80 degrees. At this time, the i-th charging temperature is less than the j+1-th temperature threshold, indicating that the comparison result of the i-th charging temperature and the j+1-th temperature threshold does not have a problem of over-charging, and the BMS determines that the charging demand current corresponding to the i-th charging temperature is the j+1-th charging demand current. Among them, the j+1-th charging demand current is the sum of the j+1-th battery current and the j+1-th load current, the j+1-th battery current is the product of the maximum allowable battery charging current and the j+1-th percentage, the j-th temperature threshold is less than the j+1-th temperature threshold, and the j-th percentage is greater than the j+1-th percentage.

[0093] Step S16: The BMS takes the j+1th temperature threshold as the jth temperature threshold and executes step S13.

[0094] When the BMS determines that the i-th charging temperature is greater than the j+1-th temperature threshold, it indicates that the comparison result between the i-th charging temperature and the j+1-th temperature threshold has a problem of over-charging, and the BMS uses the j+1-th temperature threshold as the j-th temperature threshold, and executes the step of the BMS determining whether the sequence number of the j-th temperature threshold is less than or equal to N. For example, when i is 2 and j+1 is 3, the j+1-th temperature threshold is 100 degrees, and the i-th charging temperature is 105 degrees. At this time, the i-th charging temperature is greater than the j+1-th temperature threshold, indicating that the comparison result between the i-th charging temperature and the j+1-th temperature threshold has a problem of over-charging, and the BMS uses the 3rd temperature threshold as the j-th temperature threshold, and executes the step of the BMS determining whether the sequence number of the 3rd temperature threshold is less than or equal to N.

[0095] Step S17: The BMS sends a first guidance instruction to the T-BOX, so that the T-BOX sends guidance information to the user in response to the first guidance instruction.

[0096] The first guidance instruction is the instruction to terminate charging. BMS sends a termination charging instruction to T-BOX, so that T-BOX can respond to the termination charging instruction and send guidance information to the user. Among them, the form of guidance information includes but is not limited to SMS or charging software reminder. For example, BMS sends a termination charging instruction to T-BOX, so that T-BOX can respond to the termination charging instruction and send a reminder to the user's terminal device through the remote monitoring platform, and the terminal device receives the reminder through the installed charging software. For example, the reminder content includes: a) The socket temperature is abnormal during this charging process. After charging is completed, observe whether there are foreign objects in the charging interface, whether the charging gun head is damaged, whether the terminal is deformed, corroded, or ablated; b) Confirm whether the charging pile has a high temperature of the charging gun head due to continuous charging, and continuous charging may cause the high temperature of the charging interface to affect normal charging; c) If the above two steps are normal, please change the pile for charging; d) If the socket overheating problem still exists after changing the pile, please contact the 4S store for processing.

[0097] Step S18: BMS ends charging.

[0098] When the BMS determines that the serial number of the jth temperature threshold is equal to N, it indicates that it is necessary to terminate the current reduction process for the charging demand current, and the BMS exits charging. For example, N is 4, and the serial number of the jth temperature threshold is 4. At this time, the serial number of the jth temperature threshold is equal to N, indicating that it is necessary to terminate the current reduction process for the charging demand current, and the BMS ends charging. After the current charging pile ends charging the battery, you can continue charging by changing the pile; if the socket overheating problem still exists after changing the pile, you can contact the 4S store for processing.

[0099] It should be noted that: for example, step S17 can also be executed after step S18, or step S17 can also be executed simultaneously with step S18.

[0100] In the technical solution of the method for obtaining the charging demand current provided by the embodiment of the present invention, when the BMS determines that the i-th charging temperature is less than or equal to the j-th temperature threshold, the BMS determines that the charging demand current corresponding to the i-th charging temperature is the j-th charging demand current; when the BMS determines that the i-th charging temperature is greater than the j-th temperature threshold, the BMS determines whether the sequence number of the j-th temperature threshold is less than or equal to N, when the BMS determines that the sequence number of the j-th temperature threshold is less than N, the BMS determines whether the i-th charging temperature is less than or equal to the j+1-th temperature threshold, when the BMS determines that the i-th charging temperature is less than or equal to the j+1-th temperature threshold, The BMS determines that the charging demand current corresponding to the ith charging temperature is the j+1th charging demand current; when the BMS determines that the ith charging temperature is greater than the j+1th temperature threshold, the BMS uses the j+1th temperature threshold as the jth temperature threshold, and executes the step of BMS determining whether the sequence number of the jth temperature threshold is less than or equal to N. The BMS reduces the charging demand current by comparing the ith charging temperature and the jth temperature threshold with the j+1th temperature threshold, effectively suppressing the increase in charging temperature during the charging process and reducing the rate of increase in charging temperature, thereby improving charging efficiency and enhancing user experience.

[0101] Figure 4 This is a flowchart of another charging method provided by an embodiment of the present invention, and the charging method is described in detail through a specific example. Figure 4 As shown, N is 4 as an example for description, wherein the initial temperature threshold is 75 degrees (°C), the temperature rise threshold is 4 degrees / minute (°C / min); the first temperature threshold is 85 degrees, the second temperature threshold is 95 degrees, the third temperature threshold is 105 degrees, and the fourth temperature threshold is 120 degrees; the first percentage is 100%, the second percentage is 75%, the third percentage is 50%, and the fourth percentage is 25%.

[0102] Step S21, the BMS determines whether to enter the charging process, if so, execute step S22; if not, execute step S21.

[0103] Step S22, the BMS determines whether the initial temperature is less than or equal to 75°C and whether the temperature rise rate is less than or equal to 4°C / min. If not, execute step S23; if yes, execute step S25.

[0104] Step S23: The BMS sends a second guidance instruction to the T-BOX, so that the T-BOX sends guidance information to the user in response to the second guidance instruction.

[0105] Step S24: BMS ends charging.

[0106] Step S25: The BMS obtains the first charging temperature of the charging socket during the charging process.

[0107] Step S26, the BMS determines whether the i-th charging temperature is less than or equal to 85 degrees. If so, execute step S27; if not, execute step S32.

[0108] Step S27, the BMS determines that the charging demand current corresponding to the i-th charging temperature is the first charging demand current, wherein the first charging demand current is the sum of the first battery current and the first load current, the first battery current is the product of the maximum allowable charging current of the battery and 100%, and the first load current is the full consumption current of the high-voltage load.

[0109] Step S28: The BMS charges the battery according to the first charging demand current.

[0110] Step S29: The BMS obtains the current battery power after the battery is charged and the second charging temperature of the charging socket during the charging process.

[0111] Step S30, the BMS determines whether the current battery power is less than or equal to the power at the end of charging. If so, step S31 is executed; if so, step S50 is executed.

[0112] Step S31, taking the second charging temperature as the i-th charging temperature, and executing step S26.

[0113] Step S32: The BMS determines that the sequence number of the first temperature threshold is less than 4.

[0114] Step S33, the BMS determines whether the i-th charging temperature is less than or equal to 95 degrees. If so, execute step S34; if not, execute step S36.

[0115] Step S34: The BMS determines that the charging demand current corresponding to the i-th charging temperature is the second charging demand current. The second charging demand current is the sum of the second battery current and the second load current, the second battery current is the product of the maximum allowable charging current of the battery and 75%, and the second load current is the high-voltage load derating consumption current. The high-voltage load derating consumption current is the quotient of the high-voltage load power consumption and the total battery voltage.

[0116] In an embodiment of the present invention, the high-voltage load is derated according to actual conditions, and the operation of the high-voltage load is limited, thereby reducing the current consumption of the high-voltage load when the high-voltage load is derated; or, according to actual conditions, the high-voltage load is not derated, so that the high-voltage load maintains normal operation, thereby not changing the current consumption of the high-voltage load when the high-voltage load is derated.

[0117] Step S35: The BMS charges the battery according to the second charging demand current.

[0118] In the embodiment of the present invention, after step S35, step S29 and step S30 are repeatedly executed, which will not be described in detail here.

[0119] Step S36: The BMS determines that the sequence number of the second temperature threshold is less than 4.

[0120] Step S37, the BMS determines whether the i-th charging temperature is less than or equal to 105 degrees. If so, execute step S38; if not, execute step S40.

[0121] Step S38: The BMS determines that the charging demand current corresponding to the i-th charging temperature is the third charging demand current. The third charging demand current is the sum of the third battery current and the third load current, the third battery current is the product of the maximum allowable charging current of the battery and 50%, and the third load current is the derating consumption current of the high-voltage load.

[0122] Step S39: The BMS charges the battery according to the third charging demand current.

[0123] In the embodiment of the present invention, after step S39, step S29 and step S30 are repeatedly executed, which will not be described in detail here.

[0124] Step S40: The BMS determines that the sequence number of the third temperature threshold is less than 4.

[0125] Step S41, the BMS determines whether the i-th charging temperature is less than or equal to 120 degrees, if so, execute step S42; if not, execute step S44.

[0126] Step S42: The BMS determines that the charging demand current corresponding to the i-th charging temperature is the fourth charging demand current. The fourth charging demand current is the sum of the fourth battery current and the fourth load current, the fourth battery current is the product of the maximum allowable charging current of the battery and 25%, and the fourth load current is the derating consumption current of the high-voltage load.

[0127] Step S43: The BMS charges the battery according to the fourth charging demand current.

[0128] In the embodiment of the present invention, after step S43, step S29 and step S30 are repeatedly executed, which will not be described in detail here.

[0129] Step S44: The BMS determines that the sequence number of the fourth temperature threshold is equal to 4.

[0130] Step S45: The BMS sends a first guidance instruction to the T-BOX, so that the T-BOX sends guidance information to the user in response to the first guidance instruction.

[0131] Step S46: BMS ends charging.

[0132] In the embodiment of the present invention, the increase of charging temperature is suppressed by reducing the charging demand current. If the charging temperature cannot be suppressed within 120 degrees, the fault will no longer be avoided by reducing the charging demand current, but charging will be exited.

[0133] Step S50: BMS ends charging.

[0134] In an embodiment of the present invention, before the charging temperature is greater than the fourth temperature threshold, when the current battery power is less than the power at the end of charging, the battery is charged in accordance with the charging method of the first charging temperature according to the acquired second charging temperature to the Mth charging temperature, and charging is exited when the charging temperature is greater than the fourth temperature threshold or the current battery power is equal to the power at the end of charging.

[0135] Figure 5 A schematic diagram of a flow reduction percentage provided by an embodiment of the present invention, such as Figure 5 As shown, the above embodiment takes three levels of current reduction as an example to illustrate the specific process of current reduction, and what is presented is a gradient current reduction process, but in actual applications, the number of current reduction levels can be appropriately increased or decreased according to needs. Furthermore, if the number of current reduction levels is greater, the gradient current reduction will evolve into a linear current reduction, that is, when the charging temperature triggers the first temperature threshold, the current reduction percentage will change according to the set slope, rather than a constant current reduction percentage like the gradient current reduction, such as Figure 5 As shown, the current reduction percentage can be reduced to 10%. The linear current reduction method is a process of current and temperature self-adaptation, which dynamically finds the temperature balance point under the condition of meeting the maximum charging condition.

[0136] In the embodiment of the present invention, in order to prevent frequent adjustments caused by temperature disturbances, the temperature resolution is 1°C and the anti-jitter time is 10 seconds. For example, the current charging temperature is 96°C, and the percentage of the reduction of the maximum allowable charging current of the battery is 75%. When the next temperature is greater than or equal to 97°C and the next temperature is greater than or equal to 97°C for a duration greater than or equal to 10 seconds, the percentage of the reduction of the maximum allowable charging current of the battery is updated again.

[0137] In the embodiment of the present invention, the BMS performs a current reduction process on the maximum allowable charging current of the battery according to the corresponding percentage based on the comparison result between the charging temperature and the temperature threshold. In this process, the charging time may be too long due to the charging demand current being too small. Therefore, when the maximum allowable charging current of the battery is less than the current threshold, the maximum allowable charging current of the battery will no longer be multiplied by the current reduction percentage to obtain the battery current, that is, when the maximum allowable charging current of the battery is less than the current threshold, the battery current is the maximum allowable charging current of the battery. For example, the current threshold is 30A, the maximum allowable charging current of the battery is 20A, and the maximum allowable charging current of the battery is less than the current threshold. At this time, the battery current is the maximum allowable charging current of the battery, that is, the battery current is 20A. By no longer multiplying the maximum allowable charging current of the battery with the current reduction percentage, the charging time is reduced and the charging efficiency is improved.

[0138] In the technical solution of the charging method provided in the embodiment of the present invention, the BMS obtains the initial temperature of the charging socket and the temperature rise rate of the charging socket during the charging process. When the BMS determines that the initial temperature is less than or equal to the initial temperature threshold and the temperature rise rate is less than or equal to the temperature rise threshold, the BMS obtains the first charging temperature of the charging socket during the charging process. The BMS obtains the i-th charging temperature of the charging socket during the charging process, where i is a positive integer, and determines the charging demand current corresponding to the i-th charging temperature according to the i-th charging temperature. The BMS charges the battery according to the charging demand current. During the charging process, by obtaining multiple charging temperatures and multiple charging demand currents of the charging socket, the battery is charged according to the corresponding relationship between the charging temperature and the charging demand current, which effectively suppresses the temperature rise, reduces the rate of charging temperature rise, derates the high-voltage load, improves the charging efficiency, achieves the purpose of fast charging, and enhances the user experience.

[0139] Figure 6 A schematic diagram of a charging device according to an embodiment of the present invention is shown in FIG. Figure 6 As shown, the device includes: an acquisition module 11, a determination module 12 and a charging module 13.

[0140] The acquisition module 11 is connected to the determination module 12 , and the determination module 12 is connected to the charging module 13 .

[0141] The acquisition module 11 is used to obtain the i-th charging temperature of the charging socket during the charging process, where i is a positive integer; the determination module 12 is used to determine the charging demand current corresponding to the i-th charging temperature based on the i-th charging temperature; and the charging module 13 is used to charge the battery according to the charging demand current.

[0142] In the embodiment of the present invention, the determination module 12 includes: a first judgment submodule 121 , a first determination submodule 122 , a second judgment submodule 123 , a third judgment submodule 124 and a second determination submodule 125 .

[0143] The first judgment submodule 121 is connected to the first determination submodule 122 , the second judgment submodule 123 is connected to the third judgment submodule 124 , and the third judgment submodule 124 is connected to the second determination submodule 125 .

[0144] The first judgment submodule 121 is used to judge whether the i-th charging temperature is less than or equal to the j-th temperature threshold; the first determination submodule 122 is used for determining that the charging demand current corresponding to the i-th charging temperature is the j-th charging demand current if the first judgment submodule 121 determines that the i-th charging temperature is less than or equal to the j-th temperature threshold, wherein the value range of j is 1 to N, N is a positive integer, the j-th charging demand current is the sum of the j-th battery current and the j-th load current, and the j-th battery current is the product of the maximum allowable charging current of the battery and the j-th percentage; the second judgment submodule 123 is used for determining the order of the j-th temperature threshold if the first judgment submodule 121 determines that the i-th charging temperature is greater than the j-th temperature threshold. The third judgment submodule 124 is used for judging whether the serial number of the j-th temperature threshold is less than or equal to N; if the second judgment submodule 123 judges that the serial number of the j-th temperature threshold is less than N, then judging whether the ith charging temperature is less than or equal to the j+1-th temperature threshold; the second determination submodule 125 is used for judging whether the charging demand current corresponding to the ith charging temperature is the j+1-th charging demand current if the third judgment submodule 124 judges that the ith charging temperature is less than or equal to the j+1-th temperature threshold, wherein the j+1-th charging demand current is the sum of the j+1-th battery current and the j+1-th load current, the j+1-th battery current is the product of the maximum allowable charging current of the battery and the j+1-th percentage, and the j-th temperature threshold is less than the j+1-th temperature threshold.

[0145] In an embodiment of the present invention, the second determination submodule 125 is also used for the third judgment submodule 124. If it is determined that the i-th charging temperature is greater than the j+1-th temperature threshold, the j+1-th temperature threshold is used as the j-th temperature threshold, and the second judgment submodule 123 is triggered to execute the step of determining whether the serial number of the j-th temperature threshold is less than or equal to N.

[0146] In the embodiment of the present invention, the device further includes: a sending module 14. The sending module 14 is connected to the charging module 13.

[0147] The sending module 14 is used to send a first guidance instruction to the telematics processor T-BOX when the second judgment submodule 123 determines that the serial number of the j-th temperature threshold is equal to N, so that the T-BOX sends guidance information to the user in response to the first guidance instruction; the charging module 13 is used to end charging.

[0148] In the embodiment of the present invention, the device further includes: a determination module 15. The determination module 15 and the acquisition module 11 are connected to the sending module 14.

[0149] The acquisition module 11 is also used to acquire the initial temperature of the charging socket and the temperature rise rate of the charging socket during the charging process; the judgment module 15 is used to judge whether the initial temperature is less than or equal to the initial temperature threshold and whether the temperature rise rate is less than or equal to the temperature rise threshold; the acquisition module 11 is also used to obtain the first charging temperature of the charging socket during the charging process if the judgment module 15 judges that the initial temperature is less than or equal to the initial temperature threshold and the temperature rise rate is less than or equal to the temperature rise threshold.

[0150] In the embodiment of the present invention, the sending module 14 is also used to send a second guidance instruction to the T-BOX if the judging module 15 judges that the initial temperature is greater than the initial temperature threshold or the temperature rise rate is greater than the temperature rise threshold, so that the T-BOX sends guidance information to the user in response to the second guidance instruction; the charging module 13 is also used to end charging.

[0151] In the technical solution of the charging device provided in the embodiment of the present invention, the BMS obtains the i-th charging temperature of the charging socket during the charging process, where i is a positive integer, and determines the charging demand current corresponding to the i-th charging temperature based on the i-th charging temperature. The BMS charges the battery based on the charging demand current. During the charging process, by obtaining multiple charging temperatures and multiple charging demand currents of the charging socket, the battery is charged based on the correspondence between the charging temperature and the charging demand current, thereby reducing the rate of increase of the charging temperature, improving the charging efficiency, and enhancing the user experience.

[0152] An embodiment of the present invention provides a computer-readable storage medium, which includes a stored program, wherein when the program is running, the device where the computer-readable storage medium is located is controlled to execute the steps of the embodiment of the above-mentioned charging method. For a specific description, please refer to the embodiment of the above-mentioned charging method.

[0153] An embodiment of the present invention provides a BMS, including a memory and a processor, the memory is used to store information including program instructions, the processor is used to control the execution of the program instructions, and the program instructions are loaded and executed by the processor to implement the steps of the embodiment of the above-mentioned charging method. For a specific description, please refer to the embodiment of the above-mentioned charging method.

[0154] Figure 7A schematic diagram of a BMS provided by an embodiment of the present invention is shown as follows: Figure 7 As shown, the BMS 31 includes: a processor 311, a memory 312, and a computer program 313 stored in the memory 312 and executable on the processor 311. When the computer program 313 is executed by the processor 311, the charging method in the embodiment is implemented. To avoid repetition, they are not described one by one here.

[0155] The BMS 31 includes, but is not limited to, a processor 311 and a memory 312. Those skilled in the art will appreciate that Figure 7 This is only an example of the BMS 31 and does not constitute a limitation on the BMS 31 . The BMS 31 may include more or fewer components than shown in the figure, or a combination of certain components, or different components. For example, the BMS 31 may also include input and output devices, network access devices, buses, etc.

[0156] The processor 311 may be a central processing unit (CPU), or other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), field-programmable gate arrays (FPGA), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. A general-purpose processor may be a microprocessor or any conventional processor, etc.

[0157] The memory 312 may be an internal storage unit of the BMS 31, such as a hard disk or memory of the BMS 31. The memory 312 may also be an external storage device of the BMS 31, such as a plug-in hard disk, a smart memory card (SmartMedia Card, SMC), a secure digital (Secure Digital, SD) card, a flash card (Flash Card), etc. equipped on the BMS 31. Further, the memory 312 may also include both an internal storage unit of the BMS 31 and an external storage device. The memory 312 is used to store computer programs and other programs and data required by network devices. The memory 312 may also be used to temporarily store data that has been output or is to be output.

[0158] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working processes of the systems, devices and units described above can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

[0159] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A charging method, characterized in that: The method comprises: Get the i-th charging temperature of the charging socket during the charging process, where i is a positive integer; Determining, according to the i-th charging temperature, a charging demand current corresponding to the i-th charging temperature; Charging the battery according to the charging demand current; When i is 1, before obtaining the i-th charging temperature of the charging socket during the charging process, the method further includes: Obtain the initial temperature of the charging socket and the temperature rise rate of the charging socket during charging; Determining whether the initial temperature is less than or equal to an initial temperature threshold and determining whether the temperature rise rate is less than or equal to a temperature rise threshold; If it is determined that the initial temperature is less than or equal to the initial temperature threshold and the temperature rise rate is less than or equal to the temperature rise threshold, obtaining a first charging temperature of the charging socket during the charging process; After charging the battery according to the charging demand current, the method further includes: Get the current battery power after the battery is charged and the i+1th charging temperature of the charging socket during the charging process; Determine whether the current battery power is less than or equal to the power at the end of charging; If it is determined that the current battery power is less than the power at the end of charging, the (i+1)th charging temperature is used as the i-th charging temperature, and the step of determining the charging demand current corresponding to the i-th charging temperature according to the i-th charging temperature is performed; If it is determined that the current battery power is equal to the power at the end of charging, charging is terminated.

2. The method according to claim 1, characterized in that: The determining, according to the i-th charging temperature, a charging demand current corresponding to the i-th charging temperature includes: If it is determined that the i-th charging temperature is less than or equal to the j-th temperature threshold, it is determined that the charging demand current corresponding to the i-th charging temperature is the j-th charging demand current, wherein the value range of j is 1 to N, N is a positive integer, the j-th charging demand current is the sum of the j-th battery current and the j-th load current, and the j-th battery current is the product of the maximum allowable charging current of the battery and the j-th percentage; If it is determined that the i-th charging temperature is greater than the j-th temperature threshold, determining whether the sequence number of the j-th temperature threshold is less than or equal to N; If it is determined that the sequence number of the j-th temperature threshold is less than N, determining whether the i-th charging temperature is less than or equal to the j+1-th temperature threshold; If it is determined that the i-th charging temperature is less than or equal to the j+1-th temperature threshold, it is determined that the charging demand current corresponding to the i-th charging temperature is the j+1-th charging demand current, wherein the j+1-th charging demand current is the sum of the j+1-th battery current and the j+1-th load current, the j+1-th battery current is the product of the maximum allowable charging current of the battery and the j+1-th percentage, and the j-th temperature threshold is less than the j+1-th temperature threshold.

3. The method according to claim 2, characterized in that Also includes: If it is determined that the i-th charging temperature is greater than the j+1-th temperature threshold, the j+1-th temperature threshold is used as the j-th temperature threshold, and the step of determining whether the sequence number of the j-th temperature threshold is less than or equal to N is performed.

4. The method according to claim 2, characterized in that: Also includes: If it is determined that the serial number of the j-th temperature threshold is equal to N, a first guidance instruction is sent to the telematics processor T-BOX, so that the T-BOX sends guidance information to the user in response to the first guidance instruction; End charging.

5. The method according to claim 1, characterized in that Also includes: If it is determined that the initial temperature is greater than the initial temperature threshold or the temperature rise rate is greater than the temperature rise threshold, a second guidance instruction is sent to the T-BOX, so that the T-BOX sends guidance information to the user in response to the second guidance instruction; End charging.

6. A charging device, characterized in that: The device comprises: An acquisition module is used to acquire the i-th charging temperature of the charging socket during the charging process, where i is a positive integer; a determination module, configured to determine a charging demand current corresponding to the i-th charging temperature according to the i-th charging temperature; A charging module, used to charge the battery according to the charging demand current; The device further comprises: a judgment module; The acquisition module is also used to acquire the initial temperature of the charging socket and the temperature rise rate of the charging socket during the charging process; A judgment module, used to judge whether the initial temperature is less than or equal to the initial temperature threshold and whether the temperature rise rate is less than or equal to the temperature rise threshold; The acquisition module is also used for acquiring the first charging temperature of the charging socket during the charging process if the judgment module judges that the initial temperature is less than or equal to the initial temperature threshold and the temperature rise rate is less than or equal to the temperature rise threshold; The device is also used to obtain the current battery power after the battery is charged and the i+1th charging temperature of the charging socket during the charging process; Determine whether the current battery power is less than or equal to the power at the end of charging; If it is determined that the current battery power is less than the power at the end of charging, the (i+1)th charging temperature is used as the i-th charging temperature, and the step of determining the charging demand current corresponding to the i-th charging temperature according to the i-th charging temperature is performed; If it is determined that the current battery power is equal to the power at the end of charging, charging is terminated.

7. A computer-readable storage medium, characterized in that: The computer-readable storage medium includes a stored program, wherein when the program is executed, the device where the computer-readable storage medium is located is controlled to execute the charging method according to any one of claims 1 to 5.

8. A battery management system BMS, characterized in that: include: one or more processors; Memory; and one or more computer programs, wherein the one or more computer programs are stored in the memory, and the one or more computer programs include instructions, which, when executed by the battery management system BMS, enable the battery management system BMS to perform the charging method described in any one of claims 1 to 5.

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