Battery pack charging control method and charging system

Abstract

The invention provides a battery pack charging control method and a charging system, the charging system comprises a battery pack and a charger, and the charger is electrically connected between a power grid and the battery pack; the charger is configured to determine a charging strategy of the battery pack according to charging information parameters and charge the battery pack according to the charging strategy; wherein the charging information parameters comprise an LED display equipment control signal, current required by the battery pack and the health degree of the battery pack. Therefore, the charger can charge the battery pack according to the charging strategy, so that the charger can charge different types of battery packs, and the compatibility between the charger and the battery pack is improved.

Description

Technical Field

[0001] The present application relates to the technical field of energy storage devices, and in particular to a battery pack charging control method and a charging system. Background Art

[0002] With the continuous breakthrough and expansion of lithium battery technology, as well as its advantages such as high working voltage, high specific energy, long cycle life, etc., the application of lithium batteries in various fields has gradually increased. Therefore, more comprehensive compatible chargers and smarter and longer-lasting battery packs have become the first choice of market customers, and they have important opinions on designing more reasonable and efficient charging strategies.

[0003] Once the chargers currently on the market are finalized, their charging strategies will also be finalized. When users need to charge batteries of different models, they need to use chargers of corresponding models, so that the choice of charger model is limited by the type of battery pack, which in turn makes the compatibility between the charger and the battery pack low. Summary of the invention

[0004] In view of the above, the present application provides a battery pack charging control method and a charging system to solve the problem of low compatibility between the charger and the battery pack.

[0005] A first aspect of the present application provides a charging system, comprising: a charger and a battery pack;

[0006] The charger is electrically connected between the power grid and the battery pack;

[0007] The charger is configured to determine a charging strategy for the battery pack according to charging information parameters, and charge the battery pack according to the charging strategy;

[0008] Among them, the charging information parameters include the LED display device control signal, the current required by the battery pack and the health of the battery pack.

[0009] According to some embodiments of the present application, the charger determines the charging strategy based on the LED display device control signal, wherein when the power value of the battery pack is 100%, the LED display device control signal is set to a high level signal, and when the power value of the battery pack is less than 100%, the LED display device control signal is set to a low level signal.

[0010] According to some embodiments of the present application, the battery pack is configured to determine charging information parameters based on state parameters of the battery pack, and the state parameters include at least one of the current input current of the battery pack, the current input voltage, the battery pack charge value and the battery pack temperature.

[0011] According to some embodiments of the present application, the charger includes: a first controller and a charging circuit;

[0012] The first controller is connected to the charging circuit, and the charging circuit is electrically connected between the power grid and the battery pack;

[0013] The first controller is configured to determine a charging strategy for the battery pack according to the charging information parameters, and charge the battery pack according to the charging strategy.

[0014] According to some embodiments of the present application, the first controller is configured to obtain the battery health of the battery module, determine the charging strategy of the battery module according to the battery health, and control the charger to charge the battery module according to the charging strategy.

[0015] According to some embodiments of the present application, the battery pack includes: a second controller and a battery module;

[0016] The second controller is connected to the battery module, and the battery module is connected to the charger;

[0017] The second controller is configured to determine the charging information parameter according to the state parameter of the battery pack.

[0018] A second aspect of the present application provides a battery pack charging control method, which is applied to a charging system, wherein the charging system includes a battery pack and a charger, and the battery pack charging control method includes:

[0019] Determining charging information parameters according to the state parameters of the battery pack;

[0020] The charger obtains the charging information parameters; wherein the charging information parameters include an LED display device control signal, a current required by a battery pack, and a health status of the battery pack;

[0021] The charger determines the charging strategy of the battery pack according to the charging information parameters; wherein, the charger determines the corresponding maximum input current of the battery pack according to the health of the battery pack, and the charger determines whether the current required by the battery pack is greater than the maximum input current of the battery pack; if the current required by the battery pack is greater than the maximum input current of the battery pack, the charger determines the charging strategy according to the maximum input current of the battery pack; if the current required by the battery pack is not greater than the maximum input current of the battery pack, the charger determines the charging strategy according to the current required by the battery pack;

[0022] The charger charges the battery pack according to the charging strategy.

[0023] According to some embodiments of the present application, the step of determining the charging information parameter according to the state parameter of the battery pack includes:

[0024] The charger obtains a type identification signal of the battery pack;

[0025] When the type identification signal is a first pre-stored signal, the charger determines the charging information parameter according to the state parameter of the battery pack;

[0026] When the type identification signal is a second pre-stored signal, the battery pack determines the charging information parameter according to the state parameter of the battery pack.

[0027] According to some embodiments of the present application, the step of the charger determining the charging strategy of the battery pack according to the charging information parameters includes:

[0028] The charger stores a preset charging restriction condition of the charger, and the charger determines whether the charging information parameter meets the preset charging restriction condition;

[0029] If the charging information parameter does not meet the preset charging restriction condition, the charger optimizes the charging information parameter according to the preset charging restriction condition to determine the charging strategy according to the optimized charging information parameter;

[0030] If the charging information parameter meets the preset charging restriction condition, the charger determines the charging strategy according to the charging information parameter.

[0031] According to some embodiments of the present application, the step of the charger determining the charging strategy of the battery pack according to the charging information parameters includes:

[0032] Obtaining the charging rate of the battery pack and the charging rate of a healthy battery pack within a preset voltage range under a rated charging current;

[0033] Calculating a ratio of a charging rate of the battery pack to a charging rate of the healthy battery pack;

[0034] The ratio is determined as the battery health level.

[0035] The charging system provided by the embodiment of the present application includes a battery pack and a charger, wherein the charger is electrically connected between the power grid and the battery pack; the charger is configured to determine the charging strategy of the battery pack according to the charging information parameters, and charge the battery pack according to the charging strategy; wherein the charging information parameters include the control signal of the LED display device, the current required by the battery pack, and the health of the battery pack. The charger can charge the battery pack according to the charging strategy, and further enables the charger to charge different types of battery packs, thereby improving the compatibility between the charger and the battery pack. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 This is a schematic diagram of charging system connection provided by one embodiment of the present application;

[0037] Figure 2 is a connection diagram of a charging system provided by another embodiment of the present application;

[0038] Figure 3 is a flowchart of the steps of a battery pack charging control method provided in one embodiment of the present application;

[0039] Figure 4 is a flowchart of the steps of a battery pack charging control method provided by another embodiment of the present application;

[0040] Figure 5 is a connection diagram of a charging system provided by another embodiment of the present application;

[0041] Figure 6 is a flowchart of the steps of a battery pack charging control method provided by another embodiment of the present application;

[0042] Figure 7 is a flowchart of the steps of a battery pack charging control method provided by another embodiment of the present application;

[0043] Figure 8 is a connection diagram of a charging system provided by another embodiment of the present application;

[0044] Fig. 9 is a flowchart of the steps of a battery pack charging control method provided by another embodiment of the present application;

[0045] Fig.10 is a flowchart of the steps of a battery pack charging control method provided by another embodiment of the present application;

[0046] Fig.11 This is a schematic diagram of charging system connection provided in another embodiment of the present application. DETAILED DESCRIPTION

[0047] 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.

[0048] The term "and / or" in this application is a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. The symbol " / " in this article indicates that the associated objects are in an or relationship, for example, A / B means A or B.

[0049] In the present application, the term "plurality" refers to two or more. In addition, it should be understood that in the description of the present application, the terms "first", "second", etc. are only used for the purpose of distinguishing descriptions, and cannot be understood as indicating or implying relative importance, nor can they be understood as indicating or implying an order.

[0050] In the description of the embodiments of the present application, words such as "exemplary" or "for example" are used to indicate examples, illustrations or descriptions. Any embodiment or design described as "exemplary" or "for example" in the embodiments of the present application should not be interpreted as being more preferred or more advantageous than other embodiments or designs. Specifically, the use of words such as "exemplary" or "for example" is intended to present related concepts in a specific way.

[0051] The present application provides a battery pack charging control method, wherein the battery pack charging control method is applied to Figure 1 In the charging system 100 shown, the compatibility between the charger 10 and the battery pack 20 can be improved.

[0052] See also Figure 1 , is a connection diagram of a charging system 100 provided in an embodiment of the present application. The charging system 100 comprises a charger 10 and a battery pack 20, wherein the charger 10 is electrically connected between a power grid and the battery pack 20.

[0053] In some embodiments, Figure 2 As shown, the charger 10 includes a first controller 11 and a charging circuit 12, wherein the first controller 11 is connected to the charging circuit 12, and the charging circuit 12 is electrically connected between the power grid and the battery pack 20. In some embodiments, as Figure 2 As shown, the battery pack 20 includes a second controller 21 and a battery module 22 , wherein the second controller 21 is connected to the battery module 22 , and the battery module 22 is connected to the charger 10 .

[0054] See also Figure 3 , is a step flow chart of a battery pack charging control method provided in one embodiment of the present application.

[0055] The battery pack charging control method provided in the embodiment of the present application is applied to Figure 1 The charging system 100 shown in the figure. Specifically, the battery pack charging control method of the charging system 100 specifically includes the following steps. According to different requirements, the order of some steps in the flow chart can be changed, and some steps can be omitted.

[0056] Step S31, determining charging information parameters according to the state parameters of the battery pack.

[0057] In some embodiments of the present application, when the battery pack 20 includes a second controller 21 and the second controller 21 has a computing function, the second controller 21 determines the charging information parameters of the battery pack 20 according to the state parameters of the battery pack 20 .

[0058] In some embodiments of the present application, when the battery pack 20 does not include the second controller 21, or the second controller 21 in the battery pack 20 does not have a computing function, the first controller 11 determines the charging information parameters of the battery pack 20 based on the state parameters of the battery pack 20.

[0059] Specifically, the status parameters include at least one of the current input current, current input voltage, battery pack charge value and battery pack temperature of the battery pack 20, and the charging information parameters include at least one of the required charging current, required charging voltage, LED display device control signal and battery pack health status.

[0060] It should be noted that how to determine the charging information parameters of the battery pack 20 according to the state parameters of the battery pack 20 will be described in detail later. Figure 4 , Figure 7 and Figure 8 The steps shown are described in detail and will not be repeated here to avoid repetition.

[0061] Step S32: The charger obtains charging information parameters, where the charging information parameters include a LED display device control signal.

[0062] Specifically, the first controller 11 in the charger 10 obtains the charging information parameters of the battery pack 20 , that is, the first controller 11 obtains at least one of the required charging current, required charging voltage, LED display device control signal and battery pack health status of the battery pack 20 .

[0063] Step S33: The charger determines a charging strategy for the battery pack according to the charging information parameters.

[0064] like Figure 1As shown, after the first controller 11 in the charger 10 obtains the charging information parameters, it determines the charging strategy of the battery pack 20 according to the charging information parameters. Specifically, the charging strategy includes at least one of the charging time, charging current and charging voltage of the charger 10, which is not limited to this in actual application and can be determined according to the specific application environment, all of which are within the protection scope of this application.

[0065] It should be noted that how the charger 10 determines the charging strategy of the battery pack 20 according to the charging information parameters will be described later. Figure 5 and Figure 6 The steps shown are described in detail and will not be repeated here to avoid repetition.

[0066] Step S34: The charger charges the battery pack according to the charging strategy.

[0067] like Figure 1 As shown, the first controller 11 controls the charging circuit 12 to charge the battery pack 20 according to the charging strategy. In practical applications, the charging circuit 12 can be an inverter circuit, so that the first controller 11 can control the shutdown of each switch tube in the inverter circuit according to the charging strategy to charge the battery pack 20. The practical application is not limited to this, and it depends on the specific application environment, which is within the protection scope of this application.

[0068] The battery pack charging control method provided in the present embodiment determines the charging information parameters of the battery pack 20 according to the state parameters of the battery pack 20, and then determines the charging strategy of the battery pack 20 according to the charging information parameters of the battery pack 20 through the charger 10, so that the charger 10 can charge the battery pack 20 according to the charging strategy, thereby enabling the charger 10 to charge different types of battery packs 20, thereby improving the compatibility between the charger 10 and the battery pack 20.

[0069] See also Figure 4 ,for Figure 3 Specific step diagram of step S31 in the battery pack charging control method shown.

[0070] This embodiment is a specific description of step S31 in the above embodiment, and further describes how to determine the charging information parameters of the battery pack 20 according to the state parameters of the battery pack 20. Specifically, the following steps are included:

[0071] Step S41: The charger obtains a type identification signal of the battery pack.

[0072] In practical applications, the first controller 11 pre-stores a first pre-stored signal and a second pre-stored signal. Optionally, the first pre-stored signal is a high-level signal, and the second pre-stored signal is a low-level signal.

[0073] In some embodiments of the present application, after the first controller 11 obtains the type identification signal of the battery pack 20, if the type identification signal obtained by the first controller 11 is a high-level signal, it indicates that the battery pack 20 does not include the second controller 21, or the second controller 21 in the battery pack 20 does not have the computing function, and step S42 is executed at this time; if the type identification signal obtained by the first controller 11 is a low-level signal, it indicates that the battery pack 20 includes the second controller 21, and the second controller 21 has the computing function, and step S43 is executed at this time.

[0074] Step S42: The charger determines charging information parameters according to the status parameters of the battery pack.

[0075] When the type identification signal is the first pre-stored signal, the first controller 11 in the charger 10 determines the charging information parameters of the battery pack 20 according to the state parameters of the battery pack 20 .

[0076] In some embodiments of the present application, if the status parameters include the current input current and battery pack temperature of the battery pack 20, and the charging information parameters include the charging current required for the battery pack, the first controller 11 determines whether the battery pack temperature is within the over-temperature protection range, so that when the battery pack temperature is within the over-temperature protection range, the charging current required for the battery pack is set to the maximum input current corresponding to the current battery pack temperature.

[0077] In some embodiments of the present application, if the status parameter includes the current input voltage of the battery pack 20 and the charging information parameter includes the required charging voltage of the battery pack, the first controller 11 determines whether the current input voltage is within the overvoltage protection range, so that when the current input voltage is within the overvoltage protection range, the required charging voltage of the battery pack is set to the maximum input voltage of the battery pack 20.

[0078] In some embodiments of the present application, Figure 5 As shown, Figure 2 Another connection schematic diagram of the charger 10 is shown. Specifically, the charger 10 further includes an LED display device 13 .

[0079] Specifically, for example, when the battery pack transmits normal current demand to the charger, the LED display device will be used as a light to display the charging status, including a lighting mode when the power value is 100% (e.g., green, full, etc.) and another lighting mode when it is less than 100% (e.g., yellow, not full, etc.). However, when the charger itself detects an abnormality, such as no current during charging or abnormal current and voltage, the LED display device will prioritize the display of the fault indication lighting mode (e.g., red light, flashing, etc.) according to the charger's own needs. When the LED display device control signal is used as a charging information parameter, the charger's LED display device display status can be used as part of the logic for determining the charging strategy, and then the original LED display device signal channel can be used to increase the charging strategy acquisition channel without increasing additional hardware costs, thereby improving the rationality of the charging strategy, especially when dealing with charging anomalies, full charging, etc.

[0080] When the status parameter also includes the battery pack power value, and the charging information parameter also includes the LED display device control signal, the first controller 11 sets the LED status display parameter according to the battery pack power value, and corresponds to the LED display device control signal. Specifically, when the power value is 100%, the LED display device control signal can be set to a high level signal, and when the power value is less than 100%, the LED display device control signal can be set to a low level signal.

[0081] Step S43: The battery pack determines charging information parameters according to the state parameters of the battery pack.

[0082] When the type identification signal is the second pre-stored signal, the second controller 21 determines the charging information parameters of the battery pack 20 according to the state parameters of the battery pack 20 .

[0083] In some embodiments of the present application, if the status parameters include the current input current and battery pack temperature of the battery pack 20, and the charging information parameters include the charging current required for the battery pack, the second controller 21 determines whether the battery pack temperature is within the over-temperature protection range, so that when the battery pack temperature is within the over-temperature protection range, the charging current required for the battery pack is set to the maximum input current corresponding to the current battery pack temperature.

[0084] In some embodiments of the present application, if the status parameter includes the current input voltage of the battery pack 20 and the charging information parameter includes the required charging voltage of the battery pack, the second controller 21 determines whether the current input voltage is within the overvoltage protection range, so that when the current input voltage is within the overvoltage protection range, the required charging voltage of the battery pack is set to the maximum input voltage of the battery pack 20.

[0085] In some embodiments of the present application, Figure 5 As shown, Figure 2Another connection diagram of the charger 10 shown, specifically, the charger 10 shown also includes an LED display device 13. Specifically, when the state parameter also includes the battery pack power value, and the charging information parameter also includes the LED display device control signal, the second controller 21 sets the LED state display parameter according to the battery pack power value. Specifically, when the battery pack power value is 100%, the LED display device control signal can be set to a high level signal, and when the battery pack power value is less than 100%, the LED display device control signal can be set to a low level signal.

[0086] In the battery pack charging control method in the above embodiment, after the type identification signal of the battery pack 20 is obtained by the charger 10, when the type identification signal is a first pre-stored signal, the charging information parameters are determined according to the state parameters by the first controller 11, and when the type identification signal is a second pre-stored signal, the charging information parameters are determined according to the state parameters by the second controller 21, thereby reducing the workload of the first controller 11, making the battery pack charging control method compatible with different types of battery packs 20, and further improving the compatibility between the charger 10 and the battery pack 20.

[0087] See also Figure 6 ,for Figure 1 Specific step diagram of step S33 in the battery pack charging control method shown.

[0088] This embodiment is a specific description of step S33 in the above embodiment, and further describes how the charger 10 determines the charging strategy of the battery pack 20 according to the charging information parameters. Specifically, the following steps are included:

[0089] Step S61: The charger determines whether the charging information parameters meet the preset charging restriction conditions.

[0090] In practical applications, the charger 10 pre-stores preset charging restriction conditions of the charger 10. Specifically, the preset charging condition includes at least one of a maximum output current and a maximum output voltage, which is not limited thereto in practical applications and depends on the specific application environment, and is within the protection scope of this application.

[0091] The charger 10 determines whether the charging information parameters meet the preset charging restriction conditions. If the charging information parameters do not meet the preset charging restriction conditions, step S62 is executed; if the charging information parameters meet the preset charging restriction conditions, step S63 is executed.

[0092] Step S62: The charger optimizes the charging information parameters according to the preset charging restriction conditions, so as to determine the charging strategy according to the optimized charging information parameters.

[0093] If the charging information parameters do not meet the preset charging restriction conditions, the charger 10 optimizes the charging information parameters according to the preset charging restriction conditions to determine the charging strategy of the battery pack 20 according to the optimized charging information parameters.

[0094] In some embodiments of the present application, when the charging current of the battery pack 20 in the charging information parameters is greater than the maximum output current, the charger 10 determines the maximum output current as the charging information parameter of the battery pack 20, and determines the charging strategy of the battery pack 20 based on the maximum output current, that is, determines the maximum output current as the output current of the charging circuit 12 to prevent the output current of the charger 10 from being too large and damaging the charger 10.

[0095] In some embodiments of the present application, when the charging voltage of the battery pack 20 in the charging information parameters is greater than the maximum output voltage, the charger 10 determines the maximum output voltage as the charging information parameter of the battery pack 20, and determines the charging strategy of the battery pack 20 based on the maximum output voltage, that is, determines the maximum output voltage as the output voltage of the charging circuit 12 to prevent the output voltage of the charger 10 from being too large and damaging the charger 10.

[0096] In some embodiments of the present application, when the LED display device control signal in the charging information parameter is a high-level signal, the battery pack 20 is fully charged at this time, and there is no need to charge the battery pack 20. The first controller 11 determines that the stop working signal is the charging strategy of the battery pack 20. Specifically, when the LED display device control signal is a high-level signal, the first controller 11 outputs a stop working signal to the charging circuit 12 to control the charging circuit 12 to stop outputting, thereby preventing the battery pack 20 from overcharging.

[0097] Step S63: The charger determines a charging strategy according to charging information parameters.

[0098] If the charging information parameters meet the preset charging restriction conditions, the charger 10 determines a charging strategy for the battery pack 20 according to the charging information parameters of the battery pack 20 .

[0099] In some embodiments of the present application, when the charging voltage of the battery pack 20 in the charging information parameter is not greater than the maximum output voltage, and the charging current of the battery pack 20 is not greater than the maximum output current, and the LED display device control signal is a low level signal, the charger 10 determines the charging strategy of the battery pack 20 according to the charging voltage and charging current of the battery pack 20. Specifically, the first controller 11 in the charger 10 determines that the charging voltage of the battery pack 20 is the output voltage of the charger 10, and the first controller 11 determines that the charging current of the battery pack 20 is the output current of the charger 10.

[0100] The battery pack charging control method provided in the present embodiment optimizes the charging information parameters according to the preset charging restriction conditions when the charging information parameters do not meet the preset charging restriction conditions, so as to determine the charging strategy of the battery pack 20 according to the optimized charging information parameters; and determines the charging strategy of the battery pack 20 according to the charging information parameters of the battery pack 20 when the charging information parameters meet the preset charging restriction conditions, so as to avoid damaging the charger 10 due to excessive output voltage or current of the charger 10, thereby improving the reliability of the charging system 100.

[0101] In practical applications, when the charging current of the battery pack 20 is greater than the maximum input current corresponding to the current health level of the battery pack 20, the loss of the battery module 22 in the battery pack 20 will increase. Therefore, another embodiment of the present application provides a flow chart of the steps of a battery pack charging control method, please refer to Figure 7 ,for Figure 3 Specific step diagram of step S33 in the battery pack charging control method shown.

[0102] This embodiment is a specific description of step S33 in the above embodiment, and further describes how the charger 10 determines the charging strategy of the battery pack 20 according to the charging information parameters. Specifically, the following steps are included:

[0103] Step S71: The charger determines the corresponding maximum input current of the battery pack according to the health status of the battery pack.

[0104] Specifically, the charging information parameters include the current required by the battery pack and the health of the battery pack. The first controller 11 determines the corresponding maximum input current of the battery pack according to the current health of the battery pack.

[0105] In actual applications, the first controller 11 pre-stores the maximum input current of the battery pack corresponding to the health level of each battery pack. The specific maximum input current of the battery pack corresponding to the health level of each battery pack can be obtained from actual tests. No specific limitation is made here, and it depends on the actual application environment, which is within the protection scope of this application.

[0106] Step S72: The charger determines whether the current required by the battery pack is greater than the maximum input current of the battery pack.

[0107] The first controller 11 in the charger 10 determines whether the current required by the battery pack is greater than the maximum input current of the battery pack corresponding to the current health of the battery pack. If the current required by the battery pack is greater than the maximum input current of the battery pack, it means that the current required by the battery pack is too large. If the charger 10 outputs according to the required current, the loss of the battery pack 20 will increase, so step S73 is executed at this time; if the current required by the battery pack is not greater than the maximum input current of the battery pack, step S74 is executed.

[0108] Step S73: The charger determines a charging strategy according to the maximum input current of the battery pack.

[0109] When the current required by the battery pack is greater than the maximum input current of the battery pack corresponding to the current health state of the battery pack, the first controller 11 determines the charging strategy according to the maximum input current of the battery pack, that is, determines the maximum input current of the battery pack as the charging strategy for the battery pack 20, so that the charger 10 can determine the charging strategy according to the maximum input current of the battery pack corresponding to the current health state of the battery pack.

[0110] Optional, in Figure 2 Based on Figure 8 The charger 10 also includes a temperature acquisition device 14 connected to the first controller 11, which is used to collect the working environment temperature of the charging circuit 12. In actual applications, the first controller 11 determines the charging strategy based on the current working environment temperature collected by the temperature acquisition device 14 and the maximum input current of the battery pack corresponding to the current health status of the battery pack.

[0111] Specifically, the first controller 11 determines whether the maximum input current of the battery pack is greater than the maximum input current corresponding to the current working environment temperature. When the maximum input current of the battery pack is greater than the maximum input current corresponding to the current working environment temperature, the first controller 11 determines the maximum input current corresponding to the current working environment temperature as the charging strategy of the battery pack 20, so that the first controller 11 can control the charging circuit 12 to charge the battery pack 20 according to the maximum input current corresponding to the current working environment temperature; when the maximum input current of the battery pack is not greater than the maximum input current corresponding to the current working environment temperature, the first controller 11 determines the maximum input current of the battery pack as the charging strategy of the battery pack 20, so that the first controller 11 can control the charging circuit 12 to charge the battery pack 20 according to the maximum input current of the battery pack. Avoid excessive current in the charger 10 that causes the temperature of the charger 10 to be too high, thereby damaging the charger 10.

[0112] Step S74: The charger determines a charging strategy according to the current required by the battery pack.

[0113] When the current required by the battery pack is not greater than the maximum input current of the battery pack corresponding to the current health status of the battery pack, the first controller 11 in the charger 10 determines the charging strategy according to the current required by the battery pack, so that the charger 10 can determine the charging strategy according to the current required by the battery pack.

[0114] The battery pack charging control method provided in this embodiment determines the charging strategy according to the maximum input current of the battery pack when the current required by the battery pack is greater than the maximum input current of the battery pack corresponding to the current health state of the battery pack, so that the charger 10 can charge the battery pack 20 according to the maximum input current of the battery pack corresponding to the current health state of the battery pack, thereby avoiding excessive charging current of the battery pack 20 and increasing the loss of the battery module 22.

[0115] See also Fig. 9 ,for Figure 7 Detailed step diagram of step S31 in the battery pack charging control method shown.

[0116] This embodiment is a specific description of step S31 in the above embodiment, and further describes how to determine the charging information parameters of the battery pack 20 according to the state parameters of the battery pack 20. Specifically, the following steps are included:

[0117] Step S91, obtaining the charging rate of the battery pack within the preset voltage range and the charging rate of the healthy battery pack under the rated charging current.

[0118] Obtain the charging rate V1 of the battery pack 20 in a continuous charging state within the preset voltage range under the rated charging current and the charging rate V0 of the healthy battery pack in a continuous charging state. Specifically, a healthy battery pack is a battery pack 20 in which the loss of the battery module 22 is zero under an ideal state. In actual applications, under the rated charging current, the charging rate V1 of the battery pack 20 in a continuous charging state within the preset voltage range is the charging rate V1 when the battery pack 20 is continuously charged from 40V to 10V voltage at a rated charging current of 58A; within the preset voltage range, the charging rate V0 of the healthy battery pack in a continuous charging state is the charging rate V0 when the healthy battery pack 20 is continuously charged from 40V to 58V voltage at a rated charging current of 10A. The specific values ​​of the above-mentioned preset voltage range and rated charging current are not limited thereto, and may be determined according to the specific application environment, and are all within the protection scope of this application.

[0119] Step S92: Calculate the ratio of the charging rate of the battery pack to the charging rate of a healthy battery pack.

[0120] Step S93: Determine the ratio as the battery health level.

[0121] The ratio of the charging rate V1 of the battery pack 20 and the charging rate V0 of the healthy battery pack is calculated to determine the ratio as the current battery health level of the battery pack 20 .

[0122] The battery pack charging control method provided in the present embodiment calculates the ratio of the charging rate V1 of the battery pack 20 and the charging rate V0 of the healthy battery pack to determine the ratio as the battery health level, thereby enabling the charger 10 to determine the corresponding maximum input current of the battery pack according to the battery pack health level, so that when the current required by the battery pack is greater than the maximum input current of the battery pack corresponding to the current health level of the battery pack, the charging strategy is determined according to the maximum input current of the battery pack, so that the charger 10 can charge the battery pack 20 according to the maximum input current of the battery pack corresponding to the current health level of the battery pack, thereby avoiding excessive charging current of the battery pack 20 and increasing the loss of the battery module 22.

[0123] See also Fig.10 ,for Figure 3 Another specific step schematic diagram of step S31 in the battery pack charging control method shown. Before step S31, the battery pack charging control method provided by the present application also includes the following steps:

[0124] Step S101: The charger receives a battery pack insertion signal.

[0125] The charger 10 receives the plug-in signal of the battery pack 20 to determine that the battery pack 20 is connected to the charger 10. Specifically, the first controller 11 may receive the plug-in signal output by the second controller 21 to determine that the battery pack 20 is connected to the charger 10. In practical applications, the first controller 11 and the second controller 21 may be connected via a COM (Communication, serial communication) port, and the corresponding plug-in signal is the voltage of the COM port between the first controller 11 and the second controller 21. When the voltage of the COM port is at a high level, that is, when the voltage of the COM port is 5-12V, the battery pack 20 is connected to the charger 10. When the voltage of the COM port is at a low level, that is, when the voltage of the COM port is less than 5V, the battery pack 20 is not connected to the charger 10.

[0126] In practical applications, based on the above embodiments, Fig.11 As shown, the second controller 21 in the battery pack 20 provided in the embodiment of the present application is also used to connect to the electrical equipment. Specifically, the second controller 21 is also used to obtain the power consumption information parameters of the electrical equipment to determine the power supply strategy of the battery pack 20 according to the power consumption information parameters of the electrical equipment, and then control the battery module 22 to supply power to the electrical equipment according to the power supply strategy, so that the battery pack 20 can supply power to different types of electrical equipment, thereby improving the compatibility between the battery pack 20 and the electrical equipment, and making the power supply method of the battery pack 20 more intelligent.

[0127] In some embodiments of the present application, the second controller 21 is used to obtain the discharge rate S1 of the battery pack 20 in a continuous discharge state and the discharge rate S0 of a healthy battery pack in a continuous discharge state within a preset voltage range under the rated charging current, and calculate the ratio of the discharge rate S1 of the battery pack 20 to the discharge rate S0 of the healthy battery pack to determine the ratio as the current battery health of the battery pack 20, so that the charger 10 can determine the corresponding maximum power supply current of the battery pack 20 according to the health of the battery pack, and when the current required by the electrical equipment is greater than the maximum power supply current of the battery pack 20 corresponding to the current health of the battery pack, determine the maximum power supply current of the battery pack 20 as the power supply strategy of the battery pack 20, so as to avoid the power supply current of the battery pack 20 being too large to increase the loss of the battery module 22.

[0128] Specifically, the preset voltage range is 40V to 55V. In actual applications, under the rated discharge current, the discharge rate S1 of the battery pack 20 in the continuous discharge state within the preset voltage range is, under the rated charging current of 10A, the discharge rate S1 when the battery pack 20 continuously discharges from 58V at 10A to 40V; within the preset voltage range, the discharge rate S0 of the healthy battery pack in the continuous discharge state is, under the rated charging current of 10A, the discharge rate S0 when the healthy battery pack 20 continuously discharges from 58V to 40V. The specific values ​​of the above-mentioned preset voltage range and rated discharge current are not limited to this, and can be determined according to the specific application environment, and are all within the protection scope of this application.

[0129] It is obvious to those skilled in the art that the present application is not limited to the details of the above exemplary embodiments, and that the present application can be implemented in other specific forms without departing from the spirit or basic features of the present application. Therefore, no matter from which point of view, the above embodiments of the present application should be regarded as exemplary and non-restrictive, and the scope of the present application is defined by the attached claims rather than the above description, and therefore it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present application.

Claims

1. A charging system, characterized in that: include: Chargers and battery packs; The charger is electrically connected between the power grid and the battery pack; The charger is configured to determine a charging strategy for the battery pack according to charging information parameters, and charge the battery pack according to the charging strategy; Among them, the charging information parameters include the LED display device control signal, the current required by the battery pack and the health of the battery pack.

2. The charging system according to claim 1, characterized in that: The charger determines the charging strategy based on the LED display device control signal, wherein when the power value of the battery pack is 100%, the LED display device control signal is set to a high level signal, and when the power value of the battery pack is less than 100%, the LED display device control signal is set to a low level signal.

3. The charging system according to claim 1, characterized in that: The battery pack is configured to determine charging information parameters according to state parameters of the battery pack, wherein the state parameters include at least one of a current input current of the battery pack, a current input voltage of the battery pack, a battery pack power value, and a battery pack temperature.

4. The charging system according to claim 1, characterized in that: The charger comprises: a first controller and a charging circuit; The first controller is connected to the charging circuit, and the charging circuit is electrically connected between the power grid and the battery pack; The first controller is configured to determine a charging strategy for the battery pack according to the charging information parameters, and charge the battery pack according to the charging strategy.

5. The charging system according to claim 4, characterized in that: The first controller is configured to obtain a battery health status of the battery module, determine a charging strategy of the battery module according to the battery health status, and control the charger to charge the battery module according to the charging strategy.

6. The charging system according to claim 1, characterized in that: The battery pack includes: a second controller and a battery module; The second controller is connected to the battery module, and the battery module is connected to the charger; The second controller is configured to determine the charging information parameter according to the state parameter of the battery pack.

7. A battery pack charging control method, characterized in that: Applied in a charging system, the charging system includes a battery pack and a charger, and the battery pack charging control method includes: Determining charging information parameters according to the state parameters of the battery pack; The charger obtains the charging information parameters; wherein the charging information parameters include an LED display device control signal, a current required by a battery pack, and a health status of the battery pack; The charger determines the charging strategy of the battery pack according to the charging information parameters; wherein, the charger determines the corresponding maximum input current of the battery pack according to the health of the battery pack, and the charger determines whether the current required by the battery pack is greater than the maximum input current of the battery pack; if the current required by the battery pack is greater than the maximum input current of the battery pack, the charger determines the charging strategy according to the maximum input current of the battery pack; if the current required by the battery pack is not greater than the maximum input current of the battery pack, the charger determines the charging strategy according to the current required by the battery pack; The charger charges the battery pack according to the charging strategy.

8. The battery pack charging control method according to claim 7, characterized in that: The step of determining the charging information parameter according to the state parameter of the battery pack includes: The charger obtains a type identification signal of the battery pack; When the type identification signal is a first pre-stored signal, the charger determines the charging information parameter according to the state parameter of the battery pack; When the type identification signal is a second pre-stored signal, the battery pack determines the charging information parameter according to the state parameter of the battery pack.

9. The battery pack charging control method according to claim 7, characterized in that: The step of the charger determining the charging strategy of the battery pack according to the charging information parameters includes: The charger stores a preset charging restriction condition of the charger, and the charger determines whether the charging information parameter meets the preset charging restriction condition; If the charging information parameter does not meet the preset charging restriction condition, the charger optimizes the charging information parameter according to the preset charging restriction condition to determine the charging strategy according to the optimized charging information parameter; If the charging information parameter meets the preset charging restriction condition, the charger determines the charging strategy according to the charging information parameter.

10. The battery pack charging control method according to claim 7, characterized in that: The step of the charger determining the charging strategy of the battery pack according to the charging information parameters includes: Obtaining the charging rate of the battery pack and the charging rate of a healthy battery pack within a preset voltage range under a rated charging current; Calculating a ratio of a charging rate of the battery pack to a charging rate of the healthy battery pack; The ratio is determined as the battery health level.

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