Battery low energy state charging control method, device, electronic device and medium

Abstract

The present application relates to the field of battery charging technology, and in particular to a method, device, electronic device and medium for controlling charging in a low energy state of a battery. The method comprises: when first battery voltage information is obtained, based on a first preset voltage accumulation criterion, at the end of each preset sub-time period, the first battery voltage information is accumulated and calculated to determine the first voltage information corresponding to each preset sub-time period; based on the first voltage information corresponding to each preset sub-time period, the battery is charged; when the first voltage information reaches the first preset voltage information, the first voltage information is discarded and the first current information is obtained, and the first current information is the current information of the DC current charging stage; within the preset time period, based on the first current information, the battery continues to be charged. The present application has the effect of reducing the failure rate of over-discharged batteries during charging.

Description

Technical Field

[0001] The present application relates to the field of battery charging technology, and in particular to a method, device, electronic device and medium for controlling charging of a battery in a low-energy state. Background Art

[0002] With the continuous development of new energy technologies, more and more cars powered by electricity have emerged in the field of transportation. At the same time, the charging pile system that provides charging services for electric cars is also being gradually built and improved.

[0003] In the traditional charging pile system, refer to Figure 1 It consists of rechargeable and dischargeable batteries, high-power charging piles, ACDC equipment and other equipment. The charging piles are used to charge electric vehicles. The ACDC equipment is connected to the AC power grid to process the electric energy obtained from the AC power grid and provide power to the rechargeable and dischargeable batteries and charging piles. When the ACDC equipment fails and cannot provide power to the charging pile, the rechargeable and dischargeable battery will provide power to the charging pile within a certain period of time.

[0004] However, when the ACDC equipment is damaged and has not been repaired for a long time, the rechargeable and dischargeable battery is in a discharged state for a long time, which eventually leads to over-discharge of the rechargeable and dischargeable battery; after the ACDC is repaired, charging the rechargeable and dischargeable battery in an over-discharged state by traditional current charging method can easily cause battery failure. Summary of the invention

[0005] In order to reduce the failure rate of an over-discharged battery during charging, the present application provides a battery low energy state charging control method, device, electronic device and medium.

[0006] In a first aspect, the present application provides a battery low energy state charging control method, which adopts the following technical solution:

[0007] A battery low energy state charging control method, comprising:

[0008] When the first battery voltage information is obtained, based on the first preset voltage accumulation criterion, at the end of each preset sub-time period, the first battery voltage information is accumulated and calculated to determine the first voltage information corresponding to each preset sub-time period;

[0009] Charging the battery based on the first voltage information corresponding to each preset sub-time period;

[0010] When the first voltage information reaches the first preset voltage information, the first voltage information is discarded and the first current information is acquired, where the first current information is the current information in the DC current charging stage;

[0011] Within a preset time period, the battery continues to be charged based on the first current information.

[0012] By adopting the above technical solution, when the first battery voltage information is obtained, the first preset voltage accumulation criterion is called, and based on the first preset voltage accumulation criterion, the first battery voltage information is accumulated and calculated every preset sub-time period to determine the first voltage information corresponding to each preset sub-time period, and the battery is charged with the voltage value given by the first voltage information; when the first voltage information determined by the continuous accumulation of the first battery voltage information reaches the preset first preset voltage information, it indicates that the battery is activated at this time, that is, it has a certain voltage base value. In order to speed up the charging speed of the battery, the determined first voltage information is discarded at this time, and the first current information is obtained at the same time. Within the preset time period, the battery is charged based on the first current information; by providing stepped voltage information to charge the battery in severe discharge, and after the battery has a certain voltage base value, the DC voltage charging is switched to the DC current charging, thereby ensuring the normal charging of the battery while reducing the possibility of malfunction during charging due to excessive discharge of the battery.

[0013] In a possible implementation manner, the method further includes: continuing to charge the battery based on the first current information within a preset time period; and then:

[0014] When the preset time period ends, the first current information is discarded and the first power information and the given voltage information are acquired;

[0015] Based on the first power information and the given voltage information, the battery continues to be charged.

[0016] By adopting the above technical solution, when the preset time period ends, it means that the DC current charging mode ends. At this time, the first current information obtained is discarded, and then the first power information and the given voltage information are obtained. Through the first power information and the given voltage information, the DC current charging mode is switched to the DC power charging mode to charge the battery, thereby improving the charging efficiency of the battery and accelerating the completion of battery charging.

[0017] In a possible implementation manner, the method of continuing to charge the battery based on the first power information and the given voltage information further includes:

[0018] Determining first battery power information;

[0019] Determining whether the first battery power information reaches a first preset power information;

[0020] If yes, the first power information and the given voltage information are discarded and second current information is obtained, where the second current information is current setting value information in the DC current charging stage;

[0021] The battery is charged based on the second current information.

[0022] By adopting the above technical solution, when the current battery power is high, that is, when the voltage reaches a certain value, if charging continues through the first power information and the given voltage information, it will cause the battery to overheat and the charging efficiency will be reduced. To this end, the battery power status is determined, that is, the first battery power information. When the first battery power information reaches the first preset power information, it is determined that the current battery power can switch the charging mode. Then, the second current information is obtained, and the charging mode is switched to the DC current charging mode based on the second current information, that is, the battery is charged based on the second current information, thereby reducing the situation where the battery overheats due to high-power charging, resulting in reduced charging efficiency.

[0023] In a possible implementation manner, charging the battery based on the second current information includes:

[0024] Obtain feedback current information;

[0025] performing smoothing processing on the second current information;

[0026] The second current information after the smoothing process is multiplied by the feedback current information to determine the given value current information, where the given value current information is the current information input to the AC D-axis current loop;

[0027] Based on the given value current information, the battery continues to be charged.

[0028] By adopting the above technical solution, feedback current information is obtained, and at the same time, the second current information is smoothed to prevent the second current information from exceeding the device adjustment range. Subsequently, the smoothed second current information is multiplied by the feedback current information to further determine the given value current information, and then the battery continues to be charged with the given current information.

[0029] In a possible implementation manner, the obtaining of the second current information further includes:

[0030] Determining second battery power information;

[0031] When the second battery power information reaches the second preset power information, the second battery voltage information is acquired, where the second battery voltage information is the battery voltage information when the battery is switched to a floating charge state;

[0032] Determining second voltage information according to the second battery voltage information;

[0033] Based on the second voltage information, the battery continues to be charged.

[0034] By adopting the above technical solution, after determining the second battery power information, the second battery power information is compared with the second preset power information to determine whether the current battery power has reached the power that can be charged in the floating charge mode. If the second battery power information reaches the second preset power information, that is, it is determined that the current battery can be switched to the floating charge mode of DC voltage charging, then the second voltage information is determined according to the second battery voltage information; and then the battery continues to be charged according to the second voltage information; the charging mode is switched to the floating charge mode, thereby preventing the charging current from being too large, and the battery voltage being too high when the battery is not fully charged, causing the ACDC to shut down.

[0035] In a possible implementation, determining the second voltage information according to the second battery voltage information includes:

[0036] determining a plurality of second preset sub-time periods;

[0037] Based on the second preset voltage accumulation criterion, at the end of each preset sub-time period, the second battery voltage information is accumulated and calculated to determine the second voltage information corresponding to each second preset sub-time period.

[0038] By adopting the above technical solution, at the end of each second preset sub-time period, the second battery voltage information is accumulated and calculated based on the second preset voltage accumulation criterion, and then the second voltage information corresponding to each second preset sub-time period is determined, that is, a plurality of stage-by-stage second voltage information is determined, and the battery is charged by the plurality of stage-by-stage second voltage information, that is, the battery is charged with low power, so as to prevent the battery from malfunctioning due to high-power charging in a floating charge state.

[0039] In a possible implementation manner, the obtaining of the second current information further includes:

[0040] Acquire second power information, where the second power information is power information of direct current power controlled charging;

[0041] When the second power information is less than the preset power information, a discharge control instruction is generated; or,

[0042] Acquiring third current information, where the third current information is current information of direct current controlled charging;

[0043] When the third current information is less than the preset current information, a discharge control instruction is generated.

[0044] By adopting the above technical solution, the second power information is obtained, and the second power information is compared with the preset power information. When the second power information is less than the preset power information, it is determined that the current battery is in a discharging state. At this time, the electronic device generates a discharge control instruction and controls the battery to continue discharging; or, the third current information is obtained, and the third current information is compared with the preset current information. If the third current information is less than the preset current information, a discharge control instruction is generated and the battery is controlled to continue discharging.

[0045] In a second aspect, the present application provides a battery low energy state charging control device, which adopts the following technical solution:

[0046] A battery low energy state charging control device comprises: a first voltage determination module, a first charging module, a first current acquisition module and a second charging module, wherein:

[0047] A first voltage determination module, configured to, when obtaining the first battery voltage information, perform accumulation calculation on the first battery voltage information at the end of each preset sub-time period based on a first preset voltage accumulation criterion, and determine the first voltage information corresponding to each preset sub-time period;

[0048] A first charging module, configured to charge the battery based on the first voltage information corresponding to each preset sub-time period;

[0049] a first current acquisition module, configured to discard the first voltage information and acquire first current information when the first voltage information reaches first preset voltage information, wherein the first current information is current information in a DC current charging stage;

[0050] The second charging module is used to continue charging the battery based on the first current information within a preset time period.

[0051] By adopting the above technical solution, when the first voltage determination module obtains the first battery voltage information, it calls the first preset voltage accumulation criterion, and based on the first preset voltage accumulation criterion, the first battery voltage information is accumulated and calculated every preset sub-time period to determine the first voltage information corresponding to each preset sub-time period, and the first charging module charges the battery with the given voltage value of the first voltage information; when the first voltage information determined by the continuous accumulation of the first battery voltage information reaches the preset first preset voltage information, it indicates that the battery is activated at this time, that is, it has a certain voltage base value. In order to speed up the charging speed of the battery, at this time, the first current acquisition module discards the determined first voltage information and obtains the first current information at the same time, and the second charging module charges the battery based on the first current information within the preset time period; by providing stepped voltage information to charge the battery in severe discharge, and after the battery has a certain voltage base value, switching from DC voltage charging to DC current charging, thereby ensuring the normal charging of the battery while reducing the possibility of failure during charging due to excessive discharge of the battery.

[0052] In a possible implementation, the battery low energy state charging control device further includes: a first acquisition module and a third charging module, wherein:

[0053] A first acquisition module, configured to discard the first current information and acquire first power information and given voltage information when the preset time period ends;

[0054] The third charging module is used to continue charging the battery based on the first power information and the given voltage information.

[0055] In a possible implementation, the battery low energy state charging control device further includes: a first battery power determination module, a first judgment module, a second current acquisition module and a fourth charging module, wherein:

[0056] A first battery power determination module, used to determine first battery power information;

[0057] A first judging module, used to judge whether the first battery power information reaches a first preset power information;

[0058] A second current acquisition module, configured to discard the first power information and the given voltage information and acquire second current information if the first battery power information reaches a first preset power information, wherein the second current information is current setting value information in a DC current charging stage;

[0059] A fourth charging module is used to charge the battery based on the second current information.

[0060] In a possible implementation, the fourth charging module further includes: a first current acquisition unit, a current smoothing processing unit, a second current acquisition unit and a charging unit, wherein:

[0061] A first current acquisition unit, used to acquire feedback current information;

[0062] A current smoothing processing unit, used for performing smoothing processing on the second current information;

[0063] A second current acquisition unit is used to calculate the product of the second current information after smoothing and the feedback current information to determine the given value current information, where the given value current information is the current information input to the AC D-axis current loop;

[0064] The charging unit is used to continue charging the battery based on the given value current information.

[0065] In a possible implementation, the battery low energy state charging control device further includes: a second battery power determination module, a second battery voltage acquisition module, a second voltage determination module and a fifth charging module, wherein:

[0066] A second battery power determination module, used to determine the second battery power information;

[0067] A second battery voltage acquisition module, used for acquiring second battery voltage information when the second battery power information reaches second preset power information, wherein the second battery voltage information is the battery voltage information set when switching to a floating charge state;

[0068] A second voltage determination module, used to determine second voltage information according to the second battery voltage information;

[0069] A fifth charging module is used to continue charging the battery based on the second voltage information.

[0070] In a possible implementation, the fifth charging module further includes: a sub-time period determination unit and a second voltage information determination unit, wherein:

[0071] a sub-time period determination unit, configured to determine a plurality of second preset sub-time periods;

[0072] The second voltage information determining unit is used to perform accumulation calculation on the second battery voltage information at the end of each preset sub-time period based on a second preset voltage accumulation value criterion to determine the second voltage information corresponding to each second preset sub-time period.

[0073] In a possible implementation, the battery low energy state charging control device further includes:

[0074] A second power acquisition module, used to acquire second power information, where the second power information is power information of DC power controlled charging;

[0075] a first instruction generating module, configured to generate a discharge control instruction when the second power information is less than a preset power information; or

[0076] A third current acquisition module, used to acquire third current information, where the third current information is current information of direct current controlled charging;

[0077] The second instruction generating module is used to generate a discharge control instruction when the third current information is less than the preset current information.

[0078] In a third aspect, the present application provides an electronic device, which adopts the following technical solution:

[0079] An electronic device, comprising:

[0080] at least one processor;

[0081] Memory;

[0082] At least one application, wherein the at least one application is stored in the memory and configured to be executed by at least one processor, and the at least one application is configured to: execute the above-mentioned method for controlling charging in a low energy state of a battery.

[0083] In a fourth aspect, the present application provides a computer-readable medium, which adopts the following technical solution:

[0084] A computer readable medium includes: a computer program stored therein which can be loaded by a processor and execute the above-mentioned battery low energy state charging control method.

[0085] In summary, this application includes the following beneficial technical effects:

[0086] When the first battery voltage information is obtained, the first preset voltage accumulation criterion is called, and based on the first preset voltage accumulation criterion, the first battery voltage information is accumulated and calculated every preset sub-time period to determine the first voltage information corresponding to each preset sub-time period, and the battery is charged with the voltage value given by the first voltage information; when the first voltage information determined by the continuous accumulation of the first battery voltage information reaches the preset first preset voltage information, it indicates that the battery is activated at this time, that is, it has a certain voltage base value. In order to speed up the charging speed of the battery, the determined first voltage information is discarded at this time, and the first current information is obtained at the same time. Within the preset time period, the battery is charged based on the first current information; by providing stepped voltage information to charge the battery in severe discharge, and after the battery has a certain voltage base value, the DC voltage charging is switched to the DC current charging, thereby ensuring the normal charging of the battery while reducing the possibility of failure during charging due to excessive discharge of the battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0087] Figure 1 It is a flow chart of the charging pile power supply system;

[0088] Figure 2 It is a flowchart of a method for controlling charging of a battery in a low energy state according to an embodiment of the present application;

[0089] Figure 3 It is a flowchart of a battery low energy state charging control system according to an embodiment of the present application;

[0090] Figure 4 It is a block diagram of a battery low energy state charging control device according to an embodiment of the present application;

[0091] Figure 5 It is a schematic diagram of an electronic device according to an embodiment of the present application. DETAILED DESCRIPTION

[0092] The following is combined with Figure 2-5 This application is described in further detail.

[0093] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0094] The present application embodiment provides a battery low energy state charging control method, which is executed by an electronic device, wherein the electronic device is an ACDC device, referring to Figure 2 The method comprises: step S201, step S202, step S203 and step S204, wherein:

[0095] S201. When first battery voltage information is obtained, based on a first preset voltage accumulation criterion, at the end of each preset sub-time period, the first battery voltage information is accumulated and calculated to determine first voltage information corresponding to each preset sub-time period.

[0096] For the embodiment of the present application, the first battery voltage information is the trigger information for preparing to start charging the battery; the first voltage information is the DC voltage setting information for establishing the initial energy for the battery. After a long period of discharge, the battery is in an over-discharge state, and the voltage inside the battery is too low, that is, a low energy state; in order to ensure that the battery can be charged normally in a low energy state, the voltage detection device installed in the battery by the electronic device obtains the voltage information of the battery in this state, that is, the first battery voltage information, and the electronic device determines whether the battery charging mode is switched through the first battery voltage information, that is, the switch between the traditional BMS control current charging mode and the staged control charging mode.

[0097] Specifically, the electronic device has a first preset voltage accumulation criterion preset inside; when the battery is in a low energy state, the battery is first charged by DC voltage charging, and the electronic device uses the first battery voltage information as the basic voltage of the DC voltage charging method. After each first preset sub-time period, the electronic device controls the increase of the voltage value of the first battery voltage information according to the preset voltage accumulation criterion, and based on the increased voltage, the battery is charged as the first voltage information within the corresponding first sub-preset time period. Among them, multiple preset sub-time periods are adjacent to each other in sequence, and at the end of each preset sub-time period, the voltage value is increased based on the current voltage value.

[0098] S202: Charge the battery based on the first voltage information corresponding to each preset sub-time period.

[0099] For the embodiment of the present application, the electronic device uses the first battery voltage information as the bias amount, and biases the first battery voltage information and the first voltage information. The electronic device sends the biased voltage information to the voltage PI regulator for deviation adjustment, and then inputs the current information obtained by the deviation-adjusted voltage information output by the voltage PI regulator into the AC current loop to participate in the charging of the battery; the electronic device stimulates the activity of the battery through DC voltage charging, thereby avoiding the battery failure caused by the battery being in a low energy state based on the current charging controlled by the BMS charging control device.

[0100] S203: When the first voltage information reaches the first preset voltage information, the first voltage information is discarded and first current information is acquired, where the first current information is current information in a DC current charging stage.

[0101] For the embodiment of the present application, after multiple sub-time periods preset by the electronic device have ended, at this time, the battery is in an activated state and has a certain battery voltage value. In order to improve the charging efficiency of the battery, the electronic device can continue to charge the battery by changing the charging mode of the battery; specifically, there is a first preset voltage information inside the electronic device. When the first voltage information reaches the first preset voltage information, it indicates that the current battery has been activated. Increasing the charging power can improve the charging efficiency. Then, the electronic device discards the determined first voltage information and at the same time obtains a current given value, i.e., the first current information, from the current generator. At this time, due to the discarding of the first voltage information, the output value of the voltage PI regulator gradually returns to zero, and the first current information is input into the AC current loop after smoothing and deviation adjustment, and participates in the battery charging process.

[0102] S204: within a preset time period, continue to charge the battery based on the first current information.

[0103] For the embodiment of the present application, a time period is preset inside the electronic device. During the preset time period, the electronic device continuously obtains the first current information from the current generator. After the electronic device obtains the first current information, the current information is smoothly processed. Subsequently, the first current information after the smooth processing is input into the current PI regulator for deviation adjustment. Subsequently, the electronic device inputs the adjusted current information into the AC D-axis current loop, and then participates in the battery charging process. Thus, the switching from the DC voltage charging method to the DC current charging method is realized.

[0104] The embodiment of the present application provides a battery low energy state charging control method, when the electronic device obtains the first battery voltage information, calls the first preset voltage accumulation criterion, based on the first preset voltage accumulation criterion, after each preset sub-time period, accumulates and calculates the first battery voltage information, determines the first voltage information corresponding to each preset sub-time period, and charges the battery with the first voltage information as the given voltage value; when the first voltage information determined by the continuous accumulation of the first battery voltage information reaches the preset first preset voltage information, it indicates that the battery is activated at this time, that is, it has a certain voltage base value, in order to speed up the charging speed of the battery, at this time, the electronic device discards the determined first voltage information, and at the same time the electronic device obtains the first current information, and charges the battery based on the current information within a preset time period preset in advance by the electronic device; by providing stepped voltage information to charge the battery in severe discharge, and after the battery has a certain voltage base value, switching from DC voltage charging to DC current charging; thereby ensuring the normal charging of the battery while reducing the possibility of failure during charging due to excessive discharge of the battery.

[0105] In step S204, within a preset time period, the battery continues to be charged based on the first current information, and then also includes: when the preset time period ends, the first current information is discarded and the first power information and the given voltage information are obtained; based on the first power information and the given voltage information, the battery continues to be charged.

[0106] For the embodiment of the present application, when the preset time period ends, it means that the DC current charging method ends. At this time, the electronic device will discard the first current information obtained from the current generator, wherein the method for discarding the first current information may be that the electronic device stops receiving the first current information, or controls the current generator to stop generating the first current information, which is not specifically limited in the embodiment of the present application; at this time, the battery has a certain voltage. In order to speed up the charging speed of the battery, the electronic device can charge the battery through a DC power control charging method. Specifically, while discarding the first current information, the electronic device obtains the first power information through the power generator and the given voltage information through the voltage generator. Based on the power calculation formula: P=UI, the first power information and the given voltage information are divided to determine the corresponding current given value. After that, the current given value is smoothed and deviated, and the processed current given value is sent to the AC D-axis current loop to participate in the battery charging process.

[0107] Specifically, while high power can increase the charging speed, it will also cause the battery temperature to rise. As the battery temperature rises, the battery charging efficiency will decrease and have a certain impact on the battery's service life, causing the electronic device to switch the battery's charging module to a DC power charging method. After a certain period of time, that is, when the battery contains a high amount of power, the electronic device continues to charge the battery based on the first power information and the given voltage information to avoid negative impacts on the battery itself caused by overheating of the battery, and then also includes: determining the first battery power information; determining whether the first battery power information reaches the first preset power information; if so, discarding the first power information and the given voltage information and obtaining the second current information, the second current information being the current setting value information in the DC current charging stage; charging the battery based on the second current information.

[0108] Specifically, the electronic device obtains the current no-load voltage and output current of the battery, determines the battery power, that is, the first battery power information, and then compares the first battery power information with the first preset power information. If the first battery power information reaches the first preset power information, it is determined that the current power inside the battery is high. At this time, if DC power is continued to be used to charge the battery, the charging efficiency will be reduced and the possibility of battery failure due to overheating will be increased. Then, the electronic device discards the first power information and the given voltage information, and obtains the second current information from the current generator, and charges the battery based on the second current information, that is, switching from the DC power charging mode to the DC current charging mode; wherein the second current information may be the same as the first current information.

[0109] Specifically, the process of charging the battery based on the second current information includes: obtaining feedback current information; smoothing the second current information; multiplying the second current information after smoothing with the feedback current information to determine the given value current information, the given value current information being the current information input to the AC D-axis current loop; and continuing to charge the battery based on the given value current information.

[0110] For the embodiment of the present application, after the electronic device obtains the second current information through the current generator, the second current information is smoothly processed using a ramp function. Subsequently, the second current information after smoothing is multiplied by the obtained feedback current information. Finally, the calculated given value current information is input into the DC current PI regulator for deviation adjustment. After that, the adjusted given value current information is input into the AC D-axis current loop, thereby participating in the battery charging process.

[0111] It is worth noting that the ramp function and the DC current PI regulator used in the smoothing process and the deviation adjustment process of the second current information are the same as those used in the smoothing process and the deviation adjustment process of the current information calculated from the first power information and the given voltage information, so as to achieve the purpose of simple switching between different charging modes and smooth current transition.

[0112] Specifically, when the electronic device obtains the second current information and charges the battery based on the second current information, during the process, when the battery is almost fully charged, if the battery continues to be charged using a direct current charging method, the charging current will be too large, resulting in the battery not being fully charged, and the battery voltage being artificially high, which will cause the electronic device to stop operating. Therefore, in order to avoid this situation, after obtaining the second current information, it also includes: determining the second battery power information; when the second battery power information reaches the second preset power information, obtaining the second battery voltage information, the second battery voltage information is the battery voltage information when converted to a floating charge state; determining the second voltage information based on the second battery voltage information; and continuing to charge the battery based on the second voltage information.

[0113] Specifically, the electronic device determines the second battery power information corresponding to the current battery based on the obtained no-load voltage and output current of the current battery. Subsequently, the electronic device compares the second battery power information with the second preset voltage information preset in advance. When the second battery power information reaches the second preset power information, it is determined that the current battery is about to be fully charged. At this time, the electronic device switches the battery charging mode from the DC current charging mode to the DC voltage charging module. Specifically, the electronic device increases the second battery voltage information according to an internal preset voltage increase criterion, and then determines the second voltage information; subsequently, after the second voltage information is deviation-adjusted, it participates in the battery charging process.

[0114] Specifically, in determining the second voltage information based on the second battery voltage information, it includes: determining multiple second preset sub-time periods; based on the second preset voltage accumulation criterion, at the end of each preset sub-time period, accumulating the second battery voltage information to determine the second voltage information corresponding to each second preset sub-time period.

[0115] Specifically, the electronic device is pre-set with a second preset voltage accumulation criterion, wherein the second preset voltage accumulation criterion includes a voltage accumulation step and a corresponding relationship between a sub-time period and the step; after determining a plurality of second preset sub-time periods, the electronic device accumulates the second battery voltage information based on the second preset voltage accumulation criterion at the end of each second and preset sub-time period, and determines the second voltage information corresponding to the second preset sub-time period; during the next second preset sub-time period, the second voltage information is used as the voltage information for battery charging; when the next second preset sub-time period ends, and the second voltage information is used as the new second battery voltage information, the second battery voltage information is accumulated and calculated based on the second preset voltage accumulation criterion, and then the new second voltage information is determined and participates in the battery charging, until the plurality of second preset sub-time periods end; wherein, the plurality of second preset sub-time periods are continuous, and when any second preset sub-time period ends, the adjacent second preset sub-time period starts timing.

[0116] When the battery is about to be fully charged, the battery can continue to be charged, or the charged amount of the battery can be released to power the load. At this time, it is necessary to judge the current working state of the battery, that is, to judge whether the current battery is in a charging state or a discharging state. Therefore, after obtaining the second current information, it also includes: obtaining the second power information, the second power information is the power information of DC power controlled charging; when the second power information is less than the preset power information, a discharge control instruction is generated; or, obtaining the third current information, the third current information is the current information of DC current controlled charging; when the third current information is less than the preset current information, a discharge control instruction is generated.

[0117] For the embodiments of the present application, the electronic device obtains second power information and compares the second power information with the preset power information. When the second power information is less than the preset power information, it is determined that the current battery is in a discharging state. At this time, the electronic device generates a discharge control instruction and controls the battery to continuously discharge. For example, the preset power information is zero. When the second power information is less than zero, the battery is determined to be in a discharging state. If the second power information is greater than or equal to zero, the battery is determined to be in a charging state. Alternatively, the electronic device obtains third current information, compares the third current information with the preset current information, and if the third current information is less than the preset current information, a discharge control instruction is generated and the battery is controlled to continuously discharge. For example, the preset third current information is zero. When the third current information is less than zero, the battery is determined to be in a discharging state. When the third current information is greater than or equal to zero, the battery is determined to be in a charging state.

[0118] The above embodiment introduces the specific process of battery low energy state charging control. The following embodiment introduces the battery low energy state charging control system. Figure 3After the battery is over-discharged, first, the DC voltage charging mode is used to charge the battery. Specifically, the control switch case1 is closed and the other control switches are disconnected. At this time, the battery voltage value before the ACDC device starts running is As the ACDC device controls the DC voltage target startup, the voltage control time in this mode In, the voltage value As the base value, each interval Time, according to The voltage step size is accumulated, and then the accumulated voltage value is used as the DC voltage double closed loop voltage loop The given value will then be compared with the DC voltage feedback value. After the product calculation, the calculated voltage value is input into the voltage PI regulator for deviation adjustment, and finally the current set value is determined by the determined voltage value after deviation adjustment. ; Current given value Input to the AC D-axis current loop; thereby participating in the charging of the battery.

[0119] As the battery voltage increases, the battery activity is activated and the charging power can be gradually increased to improve the charging efficiency. Specifically, the control switch case2 is closed and the other control switches are disconnected. At this time, due to the voltage PI regulator The given value and feedback value are , so the voltage PI regulator The output value will return to zero; at the same time, the current PI regulator When the DC current set value starts working, it is input into the DC current loop and the negative feedback current value after being smoothly processed by the ramp function. Feedback processing is performed, and then the given value after feedback processing is Input into the current PI regulator for deviation adjustment, and set the DC current given value after deviation adjustment Input to the AC D-axis current loop and participate in controlling battery charging.

[0120] In order to further speed up the charging speed of the battery, after a certain period of DC current mode charging, the control switch case3 is closed and the other control switches are disconnected. At this time, the fixed power value of the ACDC device is used as the power set value. , the power given value With voltage given value After the division calculation, the corresponding current given value is determined, and the current given value is smoothed by the ramp function and the current PI regulator. After the deviation is adjusted, it is input into the current D-axis current loop to participate in the battery charging.

[0121] After a certain amount of high-power fast charging, when the battery power is high, in order to avoid overheating of the battery due to high-power charging and reduce the charging efficiency, at this time, the control switch case4 is closed, and the other control switches are disconnected, and then the DC current charging module is switched to charge the battery.

[0122] When the battery is charged with DC current for a certain period of time, the battery current is about to be fully charged, that is, it reaches the preset voltage value When the DC voltage is used to charge the battery, the battery is charged to prevent the battery from being undercharged due to excessive charging current and the ACDC from shutting down due to high battery voltage. Specifically, the control switch case5 is closed and the other control switches are disconnected. At this time, the voltage control time of this mode is In, the voltage value As the base value, each interval Time, according to The voltage step size is accumulated, and then the accumulated voltage value is used as the DC voltage double closed loop voltage loop The given value is obtained by comparing the DC voltage feedback value After the product calculation, the determined voltage value is input into the voltage PI regulator for deviation adjustment. Finally, the given value of the D-axis component of the AC current loop is determined after the deviation adjustment. Input to the AC D-axis current loop; charge the battery until the accumulated value reaches the voltage value when the battery is fully charged .

[0123] The above embodiment introduces a method for controlling charging of a battery in a low energy state from the perspective of a method flow, and the following embodiment introduces a device for controlling charging of a battery in a low energy state from the perspective of a virtual module or a virtual unit. For details, please refer to the following embodiment.

[0124] Reference Figure 4 The battery low energy state charging control device 400 may specifically include: a first voltage determination module 401, a first charging module 402, a first current acquisition module 403 and a second charging module 404, wherein:

[0125] The first voltage determination module 401 is used for, when the first battery voltage information is acquired, to perform accumulation calculation on the first battery voltage information at the end of each preset sub-time period based on a first preset voltage accumulation criterion, and to determine the first voltage information corresponding to each preset sub-time period;

[0126] A first charging module 402, configured to charge the battery based on first voltage information corresponding to each preset sub-time period;

[0127] A first current acquisition module 403, configured to discard the first voltage information and acquire first current information when the first voltage information reaches the first preset voltage information, wherein the first current information is current information in a DC current charging stage;

[0128] The second charging module 404 is used to continue charging the battery based on the first current information within a preset time period.

[0129] In a possible implementation of the embodiment of the present application, the battery low energy state charging control device 400 further includes: a first acquisition module and a third charging module, wherein:

[0130] A first acquisition module, configured to discard the first current information and acquire the first power information and the given voltage information when the preset time period ends;

[0131] The third charging module is used to continue charging the battery based on the first power information and the given voltage information.

[0132] In a possible implementation of the embodiment of the present application, the battery low energy state charging control device 400 further includes: a first battery power determination module, a first judgment module, a second current acquisition module and a fourth charging module, wherein:

[0133] A first battery power determination module, used to determine first battery power information;

[0134] A first judging module, used to judge whether the first battery power information reaches the first preset power information;

[0135] A second current acquisition module is used to discard the first power information and the given voltage information and acquire second current information if the first battery power information reaches the first preset power information, where the second current information is the current setting value information in the DC current charging stage;

[0136] The fourth charging module is used to charge the battery based on the second current information.

[0137] In a possible implementation of the embodiment of the present application, the fourth charging module further includes: a first current acquisition unit, a current smoothing processing unit, a second current acquisition unit and a charging unit, wherein:

[0138] A first current acquisition unit, used to acquire feedback current information;

[0139] A current smoothing processing unit, used for performing smoothing processing on the second current information;

[0140] A second current acquisition unit is used to calculate the product of the second current information after the smoothing process and the feedback current information to determine the given value current information, where the given value current information is the current information input to the AC D-axis current loop;

[0141] The charging unit is used for continuing to charge the battery based on the given value current information.

[0142] In a possible implementation of the embodiment of the present application, the battery low energy state charging control device 400 further includes: a second battery power determination module, a second battery voltage acquisition module, a second voltage determination module and a fifth charging module, wherein:

[0143] A second battery power determination module, used to determine the second battery power information;

[0144] A second battery voltage acquisition module, used for acquiring second battery voltage information when the second battery power information reaches second preset power information, the second battery voltage information being the battery voltage information set when switching to a floating charge state;

[0145] A second voltage determination module, used to determine second voltage information according to the second battery voltage information;

[0146] The fifth charging module is used to continue charging the battery based on the second voltage information.

[0147] In a possible implementation manner of the embodiment of the present application, the fifth charging module further includes: a sub-time period determination unit and a second voltage information determination unit, wherein:

[0148] a sub-time period determination unit, configured to determine a plurality of second preset sub-time periods;

[0149] The second voltage information determining unit is used to perform cumulative calculation on the second battery voltage information at the end of each preset sub-time period based on a second preset voltage cumulative value criterion to determine the second voltage information corresponding to each second preset sub-time period.

[0150] In a possible implementation of the embodiment of the present application, the battery low energy state charging control device 400 further includes:

[0151] A second power acquisition module, used to acquire second power information, where the second power information is power information of DC power controlled charging;

[0152] A first instruction generating module is used to generate a discharge control instruction when the second power information is less than the preset power information; or,

[0153] A third current acquisition module, used to acquire third current information, where the third current information is current information of direct current controlled charging;

[0154] The second instruction generating module is used to generate a discharge control instruction when the third current information is less than the preset current information.

[0155] 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.

[0156] The present application also introduces an electronic device from the perspective of a physical device, such as Figure 5 As shown, Figure 5 The electronic device 500 shown includes: a processor 501 and a memory 503. The processor 501 and the memory 503 are connected, such as through a bus 502. Optionally, the electronic device 500 may also include a transceiver 504. It should be noted that in actual applications, the transceiver 504 is not limited to one, and the structure of the electronic device 500 does not constitute a limitation on the embodiments of the present application.

[0157] Processor 501 may be a CPU (Central Processing Unit), a general-purpose processor, a DSP (Digital Signal Processor), an ASIC (Application Specific Integrated Circuit), an FPGA (Field Programmable Gate Array) or other programmable logic devices, transistor logic devices, hardware components or any combination thereof. It may implement or execute various exemplary logic blocks, modules and circuits described in conjunction with the disclosure of this application. Processor 501 may also be a combination that implements computing functions, such as a combination of one or more microprocessors, a combination of a DSP and a microprocessor, etc.

[0158] The bus 502 may include a path to transmit information between the above components. The bus 502 may be a PCI (PerPIheral Component Interconnect) bus or an EISA (Extended Industry Standard Architecture) bus. The bus 502 may be divided into an address bus, a data bus, a control bus, etc. For ease of representation, Figure 5 Only one thick line is used in the diagram, but this does not mean that there is only one bus or only one type of bus.

[0159] The memory 503 may be a ROM (Read Only Memory) or other types of static storage devices that can store static information and instructions, a RAM (Random Access Memory) or other types of dynamic storage devices that can store information and instructions, or an EEPROM (Electrically Erasable Programmable Read Only Memory), a CD-ROM (Compact Disc Read Only Memory) or other optical disk storage, optical disk storage (including compressed optical disk, laser disk, optical disk, digital versatile disk, Blu-ray disk, etc.), a magnetic disk medium or other magnetic storage device, or any other medium that can be used to carry or store the desired program code in the form of instructions or data structures and can be accessed by a computer, but is not limited thereto.

[0160] The memory 503 is used to store the application code for executing the solution of the present application, and the execution is controlled by the processor 501. The processor 501 is used to execute the application code stored in the memory 503 to implement the contents shown in the above method embodiment.

[0161] It should be understood that, although the steps in the flowchart of the accompanying drawings are displayed in sequence as indicated by the arrows, these steps are not necessarily executed in sequence in the order indicated by the arrows. Unless otherwise specified herein, there is no strict order restriction on the execution of these steps, and they can be executed in other orders. Moreover, at least a part of the steps in the flowchart of the accompanying drawings may include multiple sub-steps or multiple stages, and these sub-steps or stages are not necessarily executed at the same time, but can be executed at different times, and their execution order is not necessarily sequential, but can be executed in turn or alternately with other steps or at least a part of the sub-steps or stages of other steps.

[0162] The above are only some implementation methods of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present application. These improvements and modifications should also be regarded as the scope of protection of the present application.

Claims

1. A battery low energy state charging control method, characterized in that: include: When the first battery voltage information is acquired, based on the first preset voltage accumulation criterion, at the end of each preset sub-time period, the first battery voltage information is accumulated and calculated to determine the first voltage information corresponding to each preset sub-time period; Charging the battery based on the first voltage information corresponding to each preset sub-time period; When the first voltage information reaches the first preset voltage information, the first voltage information is discarded and the first current information is acquired, where the first current information is the current information in the DC current charging stage; within a preset time period, continuing to charge the battery based on the first current information; The method further comprises: continuing to charge the battery based on the first current information within the preset time period; and then: When the preset time period ends, the first current information is discarded and the first power information and the given voltage information are acquired; Based on the first power information and the given voltage information, continue charging the battery; The method of continuing to charge the battery based on the first power information and the given voltage information further includes: Determining first battery power information; Determining whether the first battery power information reaches a first preset power information; If yes, the first power information and the given voltage information are discarded and second current information is obtained, where the second current information is current setting value information in the DC current charging stage; charging the battery based on the second current information; The charging the battery based on the second current information includes: Obtain feedback current information; performing smoothing processing on the second current information; The second current information after the smoothing process is multiplied by the feedback current information to determine the given value current information, where the given value current information is the current information input to the AC D-axis current loop; Based on the given value current information, the battery continues to be charged.

2. The method according to claim 1, characterized in that The obtaining of the second current information further includes: Determining second battery power information; When the second battery power information reaches the second preset power information, the second battery voltage information is acquired, where the second battery voltage information is the battery voltage information when the battery is switched to a floating charge state; Determining second voltage information according to the second battery voltage information; Based on the second voltage information, the battery continues to be charged.

3. The method according to claim 2, characterized in that The determining the second voltage information according to the second battery voltage information includes: determining a plurality of second preset sub-time periods; Based on the second preset voltage accumulation criterion, at the end of each preset sub-time period, the second battery voltage information is accumulated and calculated to determine the second voltage information corresponding to each second preset sub-time period.

4. The method according to claim 1, characterized in that: The obtaining of the second current information further includes: Acquire second power information, where the second power information is power information of direct current power controlled charging; When the second power information is less than the preset power information, a discharge control instruction is generated; or, Acquiring third current information, where the third current information is current information of direct current controlled charging; When the third current information is less than the preset current information, a discharge control instruction is generated.

5. A battery low energy state charging control device, characterized in that: include: A first voltage determination module, configured to, when obtaining the first battery voltage information, perform accumulation calculation on the first battery voltage information at the end of each preset sub-time period based on a first preset voltage accumulation criterion, and determine the first voltage information corresponding to each preset sub-time period; A first charging module, configured to charge the battery based on the first voltage information corresponding to each preset sub-time period; a first current acquisition module, configured to discard the first voltage information and acquire first current information when the first voltage information reaches first preset voltage information, wherein the first current information is current information in a DC current charging stage; A second charging module, configured to continue charging the battery based on the first current information within a preset time period; The method further comprises: continuing to charge the battery based on the first current information within the preset time period; and then: When the preset time period ends, the first current information is discarded and the first power information and the given voltage information are acquired; Based on the first power information and the given voltage information, continue charging the battery; The method of continuing to charge the battery based on the first power information and the given voltage information further includes: Determining first battery power information; Determining whether the first battery power information reaches a first preset power information; If yes, the first power information and the given voltage information are discarded and second current information is obtained, where the second current information is current setting value information in the DC current charging stage; charging the battery based on the second current information; The charging the battery based on the second current information includes: Obtain feedback current information; performing smoothing processing on the second current information; The second current information after the smoothing process is multiplied by the feedback current information to determine the given value current information, where the given value current information is the current information input to the AC D-axis current loop; Based on the given value current information, the battery continues to be charged.

6. An electronic device, characterized in that: The electronic device includes: at least one processor; Memory; At least one application, wherein the at least one application is stored in a memory and configured to be executed by at least one processor, and the at least one application is configured to: execute the battery low energy state charging control method according to any one of claims 1 to 4.

7. A computer readable medium having a computer program stored thereon, characterized in that: When the computer program is executed in a computer, the computer is caused to execute the battery low energy state charging control method according to any one of claims 1 to 4.

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