A battery management system based on lead-carbon battery fast charging technology

Abstract

The present invention provides a battery management system based on lead-carbon battery fast charging technology, which sets the battery charging mode of the lead-carbon battery based on the battery capacity, designs the battery charging strategy for the lead-carbon battery based on the battery charging mode, performs charging in different charging modes and with different charging parameters for different initial battery capacities of the lead-carbon battery, ensures charging efficiency and charging speed, then charges the lead-carbon battery according to the target charging mode and the initial charging parameters, monitors the resistance change and the battery surface temperature during the charging process of the lead-carbon battery, obtains monitoring data, and is used to evaluate the charging process based on the monitoring data, adjusts the initial charging parameters according to the evaluation results, and realizes monitoring of the charging process, so as to achieve efficient charging as much as possible while ensuring charging safety and battery health.

Description

Technical Field

[0001] The present invention relates to the technical field of battery management, and in particular to a battery management system based on lead-carbon battery fast charging technology. Background Art

[0002] Lead-carbon battery is a capacitive lead-acid battery. It is a technology evolved from traditional lead-acid batteries. It adds activated carbon to the negative electrode of the lead-acid battery, which can significantly increase the life of the lead-acid battery.

[0003] Lead-carbon battery is a new type of super battery, which is a combination of lead-acid battery and supercapacitor. It not only takes advantage of supercapacitor's instantaneous large-capacity charging, but also takes advantage of lead-acid battery's specific energy, and has very good charge and discharge performance. Moreover, due to the addition of carbon, the sulfation of negative electrode is prevented, which improves one of the factors of battery failure in the past and prolongs the battery life.

[0004] Due to the use of lead-carbon technology, the performance of lead-carbon batteries is far superior to traditional lead-acid batteries, and can be used in new energy vehicles, such as hybrid vehicles, electric bicycles, etc.; it can also be used in new energy storage fields, such as wind and solar power generation and energy storage, etc. It has a strong competitive advantage in various application fields.

[0005] The existing lead-carbon battery charging and discharging fails to effectively manage the differences in battery cells, resulting in irreversible damage to the single battery cells due to overcharging. In addition, the impact of temperature factors on battery use is not considered during use, and the charging and discharging protection thresholds cannot be adjusted according to the ambient operating temperature. Charging management is not tailored to the battery characteristics. Summary of the invention

[0006] The present invention provides a battery management system based on lead-carbon battery fast charging technology, which is used to solve the problems raised in the background technology.

[0007] A battery management system based on lead-carbon battery fast charging technology, comprising:

[0008] A strategy determination module, used to set a battery charging method for the lead-carbon battery based on the battery capacity, and to design a battery charging strategy for the lead-carbon battery based on the battery charging method;

[0009] A mode determination module is used to obtain the initial battery capacity of the lead-carbon battery and match the corresponding target charging mode for the lead-carbon battery from the battery charging strategy;

[0010] The charging monitoring module is used to charge the lead-carbon battery according to the target charging mode and initial charging parameters, and monitor the resistance change and battery surface temperature during the charging process of the lead-carbon battery to obtain monitoring data;

[0011] The charging adjustment module is used to evaluate the charging process based on the monitoring data and adjust the initial charging parameters according to the evaluation results.

[0012] Preferably, the strategy determination module includes:

[0013] A mode determination unit, used to determine that the battery charging mode for the lead-carbon battery is a constant current charging mode when the battery capacity is less than a preset capacity threshold;

[0014] The mode determination unit is further used to determine that the battery charging mode for the lead-carbon battery is a constant voltage charging mode when the battery capacity is not less than a preset capacity threshold;

[0015] A parameter determination unit, used for setting initial charging parameters for a constant current charging mode and a constant voltage charging mode based on the full charge capacity of the lead-carbon battery;

[0016] The strategy determination unit is used to obtain a battery charging strategy for the lead-carbon battery based on a battery charging method and an initial charging parameter combination.

[0017] Preferably, the parameter determination unit includes:

[0018] A range determination unit, used to match the full charge capacity of the lead-carbon battery with a preset capacity-charging parameter comparison table to determine a corresponding charging parameter range;

[0019] The parameter selection unit is used to determine and select the charging parameters that best match the charging environment parameters from the charging parameter range as the initial charging parameters of the constant current charging mode and the constant voltage charging mode.

[0020] Preferably, the method determining module includes:

[0021] A capacity judgment unit, used to determine the relationship between the initial battery capacity of the lead-carbon battery and a preset capacity threshold, and determine a target charging method for the lead-carbon battery;

[0022] a first determining unit, configured to determine the magnitude of the charging current according to the initial battery voltage of the lead-carbon battery when it is determined that the target charging mode is the constant current charging mode;

[0023] The second determining unit is used to determine the magnitude of the charging current based on the latest battery capacity of the lead-carbon battery when it is determined that the target charging mode is the constant voltage charging mode.

[0024] Preferably, the first determining unit includes:

[0025] A voltage judgment unit, used to judge whether the initial battery voltage of the lead-carbon battery is greater than a preset charging voltage when it is determined that the target charging mode is a constant current charging mode;

[0026] If so, determine that the charging current of the constant current charging method is the rated current;

[0027] Otherwise, the charging current of the constant current charging mode is determined to be the lowest limit current determined by the rated current.

[0028] Preferably, the second determining unit includes:

[0029] A parameter determination unit is used to determine the initial charging current based on the initial battery capacity of the lead-carbon battery when the target charging mode is determined to be the constant voltage charging mode, and to set the current decreasing value and the charging setting time based on the historical charging characteristics of the lead-carbon battery, and to charge the lead-carbon battery in a current decreasing charging mode according to the decreasing value based on the initial charging current, and to determine that the charging time of each charging current is the same, which is the charging setting time.

[0030] Preferably, the charging monitoring module includes:

[0031] A charging unit, used to set parameters of the charging device according to the target charging mode and initial charging parameters, and charge the lead-carbon battery after the setting is completed;

[0032] The first collection unit is used to collect the internal resistance value of the lead-carbon battery during the charging process;

[0033] The second collection unit is used to collect the battery surface temperature value of the lead-carbon battery during the charging process;

[0034] The data screening unit is used to screen the battery internal resistance value and the battery surface temperature value to obtain monitoring data.

[0035] Preferably, the charging adjustment module includes:

[0036] A difference determination unit is used to obtain historical charging data and historical discharging data of the lead-carbon battery, establish a historical charging data change curve and a historical discharging data change curve, and compare and analyze the historical charging data change curve and the historical discharging data change curve with the standard charging curve and the standard discharging curve respectively to determine the charging curve difference and the discharging curve difference;

[0037] a grade determination unit, configured to determine a first health grade of the lead-carbon battery based on a charging curve difference, determine a second health grade of the lead-carbon battery based on a discharging curve difference, and determine a comprehensive health grade of the lead-carbon battery based on the first health grade and the second health grade;

[0038] A threshold setting unit, used for setting an internal resistance threshold and a temperature threshold of the lead-carbon battery based on a comprehensive health level of the lead-carbon battery;

[0039] A data judgment unit is used to obtain a battery internal resistance change curve and a battery surface temperature change curve of the lead-carbon battery during the charging process from the monitoring data, and to judge whether the battery internal resistance change curve and the battery surface temperature change curve are both less than the internal resistance threshold and the temperature threshold, respectively. If so, it is determined that the initial charging parameters do not need to be adjusted; otherwise, it is determined that the initial charging parameters need to be adjusted;

[0040] A first adjustment unit, configured to determine whether a resistance difference between a battery internal resistance change curve and an internal resistance threshold is within a preset resistance difference range after determining that the initial charging parameters need to be adjusted;

[0041] If yes, adjust the initial charging parameters of the lead-carbon battery to achieve a balanced charging effect;

[0042] Otherwise, the charging current in the initial charging parameters of the lead-carbon battery is set to be one tenth of the current capacity of the lead-carbon battery for charging;

[0043] A second adjustment unit, used to determine whether a temperature value difference between a battery surface temperature value variation curve and a temperature threshold value is within a preset temperature value difference range after adjusting the initial charging parameters;

[0044] If so, adjusting the initial charging parameters of the lead-carbon battery to achieve a charging speed below a preset speed threshold;

[0045] Otherwise, stop charging the lead-carbon battery.

[0046] Preferably, the level determination unit comprises:

[0047] The level comparison unit is used to take the second health level as the comprehensive health level when the first health level is higher than the second health level, and otherwise take the first health level as the comprehensive health level.

[0048] Preferably, the threshold setting unit includes:

[0049] a first setting unit, for determining, when the comprehensive health level is higher than a preset level threshold, the internal resistance threshold of the lead-carbon battery as the sum of the rated internal resistance and the first internal resistance value; otherwise, determining the internal resistance threshold of the carbon battery as the sum of the rated internal resistance, the first internal resistance value and the second internal resistance value;

[0050] The second setting unit is used to determine that the temperature threshold of the lead-carbon battery is the rated temperature when the comprehensive health level is higher than the preset level threshold, otherwise, determine that the temperature threshold of the lead-carbon battery is the sum of the rated temperature and the preset temperature increase value.

[0051] Compared with the prior art, the present invention has achieved the following beneficial effects:

[0052] By setting the battery charging method of the lead-carbon battery based on the battery capacity, designing the battery charging strategy for the lead-carbon battery based on the battery charging method, charging with different charging methods and different charging parameters according to different initial battery capacities of the lead-carbon battery, ensuring the charging efficiency and charging speed, then charging the lead-carbon battery according to the target charging method and initial charging parameters, and monitoring the resistance change and battery surface temperature during the charging process of the lead-carbon battery to obtain monitoring data, evaluating the charging process based on the monitoring data, adjusting the initial charging parameters according to the evaluation results, realizing the monitoring of the charging process, and achieving efficient charging as much as possible while ensuring charging safety and battery health.

[0053] Other features and advantages of the present invention will be described in the following description, and partly become apparent from the description, or understood by practicing the present invention. The purpose and other advantages of the present invention can be realized and obtained by the structures particularly pointed out in the written description, claims, and drawings.

[0054] The technical solution of the present invention is further described in detail below through the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0055] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0056] Figure 1 This is a structural diagram of a battery management system based on lead-carbon battery fast charging technology in an embodiment of the present invention;

[0057] Figure 2 A structural diagram of a module determined by the method described in an embodiment of the present invention;

[0058] Figure 3 4 is a structural diagram of the charging adjustment module described in an embodiment of the present invention. DETAILED DESCRIPTION

[0059] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0060] Embodiment 1:

[0061] A battery management system based on lead-carbon battery fast charging technology, such as Figure 1 As shown, including:

[0062] A strategy determination module, used to set a battery charging method for the lead-carbon battery based on the battery capacity, and to design a battery charging strategy for the lead-carbon battery based on the battery charging method;

[0063] A mode determination module is used to obtain the initial battery capacity of the lead-carbon battery and match the corresponding target charging mode for the lead-carbon battery from the battery charging strategy;

[0064] The charging monitoring module is used to charge the lead-carbon battery according to the target charging mode and initial charging parameters, and monitor the resistance change and battery surface temperature during the charging process of the lead-carbon battery to obtain monitoring data;

[0065] The charging adjustment module is used to evaluate the charging process based on the monitoring data and adjust the initial charging parameters according to the evaluation results.

[0066] In this embodiment, the battery charging mode includes constant voltage charging and constant current charging.

[0067] In this embodiment, the initial charging parameters include, for example, charging current, charging voltage, charging time, etc.

[0068] In this embodiment, adjusting the initial charging parameters includes adjusting the initial charging parameters to achieve a purpose of balanced charging or controlling a charging speed.

[0069] The beneficial effects of the above design scheme are: by setting the battery charging method of the lead-carbon battery based on the battery capacity, designing the battery charging strategy for the lead-carbon battery based on the battery charging method, charging with different charging methods and different charging parameters for different initial battery capacities of the lead-carbon battery, ensuring the charging efficiency and charging speed, and then charging the lead-carbon battery according to the target charging method and initial charging parameters, and monitoring the resistance change and battery surface temperature during the charging process of the lead-carbon battery to obtain monitoring data, and evaluating the charging process based on the monitoring data, adjusting the initial charging parameters according to the evaluation results, realizing the monitoring of the charging process, and achieving efficient charging as much as possible while ensuring charging safety and battery health.

[0070] Embodiment 2:

[0071] Based on Example 1, the embodiment of the present invention provides a battery management system based on lead-carbon battery fast charging technology, and the strategy determination module includes:

[0072] A mode determination unit, used to determine that the battery charging mode for the lead-carbon battery is a constant current charging mode when the battery capacity is less than a preset capacity threshold;

[0073] The mode determination unit is further used to determine that the battery charging mode for the lead-carbon battery is a constant voltage charging mode when the battery capacity is not less than a preset capacity threshold;

[0074] A parameter determination unit, used for setting initial charging parameters for a constant current charging mode and a constant voltage charging mode based on the full charge capacity of the lead-carbon battery;

[0075] The strategy determination unit is used to obtain a battery charging strategy for the lead-carbon battery based on a battery charging method and an initial charging parameter combination.

[0076] In this embodiment, the initial charging parameters include, for example, a constant current, a constant voltage, a charging time, and the like.

[0077] The beneficial effects of the above design scheme are: by setting the battery charging method of the lead-carbon battery based on the battery capacity, designing the battery charging strategy for the lead-carbon battery based on the battery charging method, and charging with different charging methods and different charging parameters according to different initial battery capacities of the lead-carbon battery, the charging efficiency and charging speed are guaranteed.

[0078] Embodiment 3:

[0079] Based on Example 2, the embodiment of the present invention provides a battery management system based on lead-carbon battery fast charging technology, and the parameter determination unit includes:

[0080] A range determination unit, used to match the full charge capacity of the lead-carbon battery with a preset capacity-charging parameter comparison table to determine a corresponding charging parameter range;

[0081] The parameter selection unit is used to determine and select the charging parameters that best match the charging environment parameters from the charging parameter range as the initial charging parameters of the constant current charging mode and the constant voltage charging mode.

[0082] The beneficial effect of the above design scheme is: by determining and selecting the charging parameters that best match the charging environment parameters from the charging parameter range as the initial charging parameters of the constant current charging mode and the constant voltage charging mode, the rationality of the obtained initial charging parameters is ensured, providing a basis for ensuring the charging efficiency.

[0083] Embodiment 4:

[0084] Based on Example 1, the present invention provides a battery management system based on lead-carbon battery fast charging technology, such as Figure 2 As shown, the mode determination module includes:

[0085] A capacity judgment unit, used to determine the relationship between the initial battery capacity of the lead-carbon battery and a preset capacity threshold, and determine a target charging method for the lead-carbon battery;

[0086] a first determining unit, configured to determine the magnitude of the charging current according to the initial battery voltage of the lead-carbon battery when it is determined that the target charging mode is the constant current charging mode;

[0087] The second determining unit is used to determine the magnitude of the charging current based on the latest battery capacity of the lead-carbon battery when it is determined that the target charging mode is the constant voltage charging mode.

[0088] In this embodiment, when the magnitude of the charging current is determined to be inconsistent with the initial charging parameters, the present charging current is selected.

[0089] The beneficial effects of the above design scheme are: by referring to the initial battery voltage and the latest battery capacity of the lead-carbon battery to set the charging current after the charging method is determined, the charging effect is guaranteed by setting a reasonable charging current.

[0090] Embodiment 5:

[0091] Based on Example 4, the embodiment of the present invention provides a battery management system based on lead-carbon battery fast charging technology, wherein the first determining unit includes:

[0092] A voltage judgment unit, used to judge whether the initial battery voltage of the lead-carbon battery is greater than a preset charging voltage when it is determined that the target charging mode is a constant current charging mode;

[0093] If so, determine that the charging current of the constant current charging method is the rated current;

[0094] Otherwise, the charging current of the constant current charging mode is determined to be the lowest limit current determined by the rated current.

[0095] In this embodiment, the lowest limit current is less than the rated current.

[0096] The beneficial effect of the above design scheme is: by judging whether the initial battery voltage of the lead-carbon battery is greater than the preset charging voltage, the charging current of the constant current charging method is determined to ensure the charging efficiency and charging safety.

[0097] Embodiment 6:

[0098] Based on Example 4, the embodiment of the present invention provides a battery management system based on lead-carbon battery fast charging technology, wherein the second determining unit includes:

[0099] A parameter determination unit is used to determine the initial charging current based on the initial battery capacity of the lead-carbon battery when the target charging mode is determined to be the constant voltage charging mode, and to set the current decreasing value and the charging setting time based on the historical charging characteristics of the lead-carbon battery, and to charge the lead-carbon battery in a current decreasing charging mode according to the decreasing value based on the initial charging current, and to determine that the charging time of each charging current is the same, which is the charging setting time.

[0100] In this embodiment, the historical charging characteristics include historical charging current, historical charging time and its corresponding charging efficiency, etc.

[0101] The beneficial effects of the above design scheme are: by determining the initial charging current based on the initial battery capacity of the lead-carbon battery, and setting the current decrease value and the charging setting time based on the historical charging characteristics of the lead-carbon battery, and charging the lead-carbon battery in a current decreasing charging manner according to the decrease value based on the initial charging current, determining that the charging time of each charging current is the same, which is the charging setting time, to achieve a reasonable design of the charging current in the constant voltage charging mode, to achieve fast charging, and to improve charging efficiency.

[0102] Embodiment 7:

[0103] Based on Example 1, the embodiment of the present invention provides a battery management system based on lead-carbon battery fast charging technology, and the charging monitoring module includes:

[0104] A charging unit, used to set parameters of the charging device according to the target charging mode and initial charging parameters, and charge the lead-carbon battery after the setting is completed;

[0105] The first collection unit is used to collect the internal resistance value of the lead-carbon battery during the charging process;

[0106] The second collection unit is used to collect the battery surface temperature value of the lead-carbon battery during the charging process;

[0107] The data screening unit is used to screen the battery internal resistance value and the battery surface temperature value to obtain monitoring data.

[0108] In this embodiment, data screening is performed on the battery internal resistance value and the battery surface temperature value to screen out erroneous data and ensure the accuracy of the monitored data.

[0109] The beneficial effect of the above design scheme is: by collecting the battery internal resistance value and battery surface temperature value of the lead-carbon battery during the charging process, data monitoring of the charging process can be achieved, providing a data basis for healthy charging.

[0110] Embodiment 8:

[0111] Based on Example 1, the present invention provides a battery management system based on lead-carbon battery fast charging technology, such as Figure 3 As shown, the charging adjustment module includes:

[0112] A difference determination unit is used to obtain historical charging data and historical discharging data of the lead-carbon battery, establish a historical charging data change curve and a historical discharging data change curve, and compare and analyze the historical charging data change curve and the historical discharging data change curve with the standard charging curve and the standard discharging curve respectively to determine the charging curve difference and the discharging curve difference;

[0113] a grade determination unit, configured to determine a first health grade of the lead-carbon battery based on a charging curve difference, determine a second health grade of the lead-carbon battery based on a discharging curve difference, and determine a comprehensive health grade of the lead-carbon battery based on the first health grade and the second health grade;

[0114] A threshold setting unit, used for setting an internal resistance threshold and a temperature threshold of the lead-carbon battery based on a comprehensive health level of the lead-carbon battery;

[0115] A data judgment unit is used to obtain a battery internal resistance change curve and a battery surface temperature change curve of the lead-carbon battery during the charging process from the monitoring data, and to judge whether the battery internal resistance change curve and the battery surface temperature change curve are both less than the internal resistance threshold and the temperature threshold, respectively. If so, it is determined that the initial charging parameters do not need to be adjusted; otherwise, it is determined that the initial charging parameters need to be adjusted;

[0116] A first adjustment unit, configured to determine whether a resistance difference between a battery internal resistance change curve and an internal resistance threshold is within a preset resistance difference range after determining that the initial charging parameters need to be adjusted;

[0117] If yes, adjust the initial charging parameters of the lead-carbon battery to achieve a balanced charging effect;

[0118] Otherwise, the charging current in the initial charging parameters of the lead-carbon battery is set to be one tenth of the current capacity of the lead-carbon battery for charging;

[0119] A second adjustment unit, used to determine whether a temperature value difference between a battery surface temperature value variation curve and a temperature threshold value is within a preset temperature value difference range after adjusting the initial charging parameters;

[0120] If so, adjusting the initial charging parameters of the lead-carbon battery to achieve a charging speed below a preset speed threshold;

[0121] Otherwise, stop charging the lead-carbon battery.

[0122] In this embodiment, the smaller the difference in the charging curves, the higher the corresponding first health level, and the smaller the difference in the discharging curves, the higher the corresponding second health level.

[0123] The beneficial effects of the above design scheme are: by setting the internal resistance threshold and temperature threshold of the lead-carbon battery based on the comprehensive health level of the lead-carbon battery, ensuring the consistency of the determination of the internal resistance threshold and the temperature threshold with the battery usage, providing a basis for healthy battery charging, and then, judging whether the battery internal resistance value change curve and the battery surface temperature value change curve are respectively less than the internal resistance threshold and the temperature threshold. If so, it is determined that the initial charging parameters do not need to be adjusted. Otherwise, it is determined that the initial charging parameters need to be adjusted. The relationship between the change curve and the threshold is used to determine whether the charging parameters need to be adjusted, and the judgment of parameter adjustment is realized. The specific adjustment is to judge the relationship between the battery internal resistance value change curve and the internal resistance threshold. Whether the resistance difference is within the preset resistance difference range; if so, adjust the initial charging parameters of the lead-carbon battery to achieve a balanced charging effect, otherwise, set the charging current in the initial charging parameters of the lead-carbon battery to be charged to one tenth of the current capacity of the lead-carbon battery, and realize effective and healthy charging of the battery from the aspect of the battery internal resistance, and judge whether the temperature difference between the battery surface temperature value change curve and the temperature threshold is within the preset temperature value difference range. If so, adjust the initial charging parameters of the lead-carbon battery to achieve a charging speed below the preset speed threshold; otherwise, stop charging the lead-carbon battery, realize effective and healthy charging of the battery from the aspect of the battery surface temperature, and realize effective management of the battery charging process.

[0124] Embodiment 9:

[0125] Based on Example 8, the embodiment of the present invention provides a battery management system based on lead-carbon battery fast charging technology, and the level determination unit includes:

[0126] The level comparison unit is used to take the second health level as the comprehensive health level when the first health level is higher than the second health level, and otherwise take the first health level as the comprehensive health level.

[0127] The beneficial effect of the above design scheme is to ensure the accuracy of the comprehensive health level of the lead-carbon battery.

[0128] Embodiment 10:

[0129] Based on Example 8, the embodiment of the present invention provides a battery management system based on lead-carbon battery fast charging technology, wherein the threshold setting unit includes:

[0130] a first setting unit, for determining, when the comprehensive health level is higher than a preset level threshold, the internal resistance threshold of the lead-carbon battery as the sum of the rated internal resistance and the first internal resistance value; otherwise, determining the internal resistance threshold of the carbon battery as the sum of the rated internal resistance, the first internal resistance value and the second internal resistance value;

[0131] The second setting unit is used to determine that the temperature threshold of the lead-carbon battery is the rated temperature when the comprehensive health level is higher than the preset level threshold, otherwise, determine that the temperature threshold of the lead-carbon battery is the sum of the rated temperature and the preset temperature increase value.

[0132] In this embodiment, the first internal resistance value, the second internal resistance value and the preset temperature increase value are all set in advance according to the actual situation of the battery.

[0133] The beneficial effect of the above design scheme is: by setting the internal resistance threshold and temperature threshold according to the relationship between the comprehensive health level and the preset level threshold bracket, it is ensured that the internal resistance threshold and temperature threshold are highly matched with the battery condition, providing a basis for adjusting the charging parameters.

[0134] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A battery management system based on lead-carbon battery fast charging technology, characterized in that: include: A strategy determination module, used to set a battery charging mode of a lead-carbon battery based on the battery capacity, and to design a battery charging strategy for the lead-carbon battery based on the battery charging mode; wherein the strategy determination module includes: a mode determination unit, used to determine that the battery charging mode for the lead-carbon battery is a constant current charging mode when the battery capacity is less than a preset capacity threshold; the mode determination unit is also used to determine that the battery charging mode for the lead-carbon battery is a constant voltage charging mode when the battery capacity is not less than the preset capacity threshold; a parameter determination unit, used to set initial charging parameters for the constant current charging mode and the constant voltage charging mode based on the full-charge capacity of the lead-carbon battery; a strategy determination unit, used to obtain a battery charging strategy for the lead-carbon battery based on the combination of the battery charging mode and the initial charging parameters; wherein the parameter determination unit includes: a range determination unit, used to match the full-charge capacity of the lead-carbon battery with a preset capacity-charging parameter comparison table to determine the corresponding charging parameter range; a parameter selection unit, used to determine and select the charging parameters that best match the charging environment parameters from the charging parameter range as the initial charging parameters of the constant current charging mode and the constant voltage charging mode; A mode determination module is used to obtain the initial battery capacity of the lead-carbon battery and match the corresponding target charging mode for the lead-carbon battery from the battery charging strategy; wherein the mode determination module includes: a capacity judgment unit, which is used to determine the size relationship between the initial battery capacity of the lead-carbon battery and a preset capacity threshold, and determine the target charging mode for the lead-carbon battery; a first determination unit, which is used to determine the size of the charging current according to the initial battery voltage of the lead-carbon battery when the target charging mode is determined to be a constant current charging mode; a second determination unit, which is used to determine the size of the charging current based on the latest battery capacity of the lead-carbon battery when the target charging mode is determined to be a constant voltage charging mode; wherein the first determination unit includes: a voltage judgment unit, which is used to determine the size of the charging current according to the initial battery voltage .... When the target charging mode is a constant current charging mode, it is determined whether the initial battery voltage of the lead-carbon battery is greater than the preset charging voltage; if so, the charging current of the constant current charging mode is determined to be the rated current; otherwise, the charging current of the constant current charging mode is determined to be the lowest limit current determined based on the rated current; the second determination unit includes: a parameter determination unit, which is used to determine the initial charging current based on the initial battery capacity of the lead-carbon battery when the target charging mode is determined to be a constant voltage charging mode, and to set the current decreasing value and the charging setting time based on the historical charging characteristics of the lead-carbon battery, and to charge the lead-carbon battery according to the current decreasing charging mode according to the decreasing value based on the initial charging current, and to determine that the charging time of each charging current is the same, which is the charging setting time; A charging monitoring module is used to charge the lead-carbon battery according to the target charging mode and initial charging parameters, and monitor the resistance change and battery surface temperature of the lead-carbon battery during the charging process to obtain monitoring data; wherein, the charging monitoring module includes: a charging unit, which is used to set parameters of the charging device according to the target charging mode and initial charging parameters, and charge the lead-carbon battery after the setting is completed; a first acquisition unit, which is used to collect the battery internal resistance value of the lead-carbon battery during the charging process; a second acquisition unit, which is used to collect the battery surface temperature value of the lead-carbon battery during the charging process; a data screening unit, which is used to screen the battery internal resistance value and the battery surface temperature value to obtain monitoring data; A charging adjustment module is used to evaluate the charging process based on monitoring data, and adjust the initial charging parameters according to the evaluation results; wherein, the charging adjustment module includes: a difference determination unit, used to obtain historical charging data and historical discharge data of the lead-carbon battery, establish a historical charging data change curve and a historical discharge data change curve, and compare and analyze the historical charging data change curve and the historical discharge data change curve with the standard charging curve and the standard discharge curve respectively to determine the charging curve difference and the discharge curve difference; a level determination unit, used to determine the first health level of the lead-carbon battery based on the charging curve difference, determine the second health level of the lead-carbon battery based on the discharge curve difference, and determine the comprehensive health level of the lead-carbon battery based on the first health level and the second health level; a threshold setting unit, used to set the internal resistance threshold and temperature threshold of the lead-carbon battery based on the comprehensive health level of the lead-carbon battery; a data judgment unit, used to obtain the battery internal resistance value change curve of the lead-carbon battery during the charging process from the monitoring data, and The battery surface temperature value change curve during the charging process is used to determine whether the battery internal resistance value change curve and the battery surface temperature value change curve are respectively less than the internal resistance threshold and the temperature threshold. If so, it is determined that the initial charging parameters do not need to be adjusted, otherwise, it is determined that the initial charging parameters need to be adjusted; the first adjustment unit is used to determine whether the resistance difference between the battery internal resistance value change curve and the internal resistance threshold is within a preset resistance difference range after determining that the initial charging parameters need to be adjusted; if so, adjust the initial charging parameters of the lead-carbon battery to achieve a balanced charging effect; otherwise, set the charging current in the initial charging parameters of the lead-carbon battery to be one tenth of the current capacity of the lead-carbon battery for charging; the second adjustment unit is used to determine whether the temperature difference between the battery surface temperature value change curve and the temperature threshold is within a preset temperature difference range after the initial charging parameters are adjusted; if so, adjust the initial charging parameters of the lead-carbon battery to achieve a charging speed below the preset speed threshold; otherwise, stop charging the lead-carbon battery.

2. A battery management system based on lead-carbon battery fast charging technology according to claim 1, characterized in that: The level determination unit comprises: The level comparison unit is used to take the second health level as the comprehensive health level when the first health level is higher than the second health level, and otherwise take the first health level as the comprehensive health level.

3. A battery management system based on lead-carbon battery fast charging technology according to claim 1, characterized in that: The threshold setting unit comprises: a first setting unit, for determining, when the comprehensive health level is higher than a preset level threshold, the internal resistance threshold of the lead-carbon battery as the sum of the rated internal resistance and the first internal resistance value; otherwise, determining the internal resistance threshold of the carbon battery as the sum of the rated internal resistance, the first internal resistance value and the second internal resistance value; The second setting unit is used to determine that the temperature threshold of the lead-carbon battery is the rated temperature when the comprehensive health level is higher than the preset level threshold, otherwise, determine that the temperature threshold of the lead-carbon battery is the sum of the rated temperature and the preset temperature increase value.

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