Battery charging control system, method and battery system based on external power supply

Abstract

The present application relates to the field of battery management technology, and discloses a battery charging control system, method and battery system based on an external power supply. The charging control system includes a battery management system and a communication network, and the external power supply information received from the external power supply is sent to the battery management system through the communication network; the battery management system controls the target object to perform a target charging operation on the first battery pack according to the first battery information and the status message information received from the power module. The target object includes an external power supply or a power module. It can be seen that the implementation of the present application can flexibly select an external power supply or a power module inside an electronic device to charge the battery pack according to the power supply information of the external power supply and the status message of the power module through the battery management system, which is conducive to realizing accurate charging of the battery pack, thereby helping to reduce the occurrence of battery loss caused by charging the battery pack through an unsuitable power supply.

Description

Technical Field

[0001] The present application relates to the field of battery management technology, and in particular to a battery charging control system, method and battery system based on an external power supply. Background Art

[0002] At present, it is an industry trend to replace the 12V lead-acid battery of pure electric vehicles with 12V lithium battery. Compared with the previous lead-acid battery, when the battery pack is low on power, the 12V lithium battery is prone to impact the battery cell if a large current is directly connected. Therefore, it is usually necessary to add a current limiting module to the control board of the 12V lithium battery.

[0003] However, it is found in practice that after adding the current limiting module, when the vehicle is jump-started, if the external jump-start power source has not been removed, and the DCDC (Direct Current-Direct Current Converter) in the power module inside the vehicle has started to send messages to the outside, the BMS (BATTERY MANAGEMENT SYSTEM) will not be able to distinguish whether the current pole voltage is output by the vehicle DCDC or is still output by the power source because the external jump-start power source has not been removed. At this time, if the current limiting module is exited under a large voltage difference, there will still be high current charging, resulting in battery damage. It can be seen that it is particularly important to propose a technical solution to reduce the occurrence of battery damage during charging when using an external power source for jump-starting. Summary of the invention

[0004] The present application provides a battery charging control system, method and battery system based on an external power supply, which can flexibly select an external power supply or an internal power module to charge a battery pack, which is conducive to realizing accurate charging of the battery pack and reducing the occurrence of battery loss caused by charging the battery pack through an unsuitable power supply.

[0005] In order to solve the above technical problems, the first aspect of the present application discloses a battery charging control system based on an external power supply, wherein the charging control system includes a battery management system and a communication network, wherein:

[0006] The first end of the battery management system is electrically connected to the first end of the communication network, and is used to electrically connect the first end of the external power supply and the first end of the power module. The second end of the battery management system is electrically connected to the second end of the communication network, and is used to electrically connect the second end of the external power supply and the second end of the power module. The third end of the battery management system is used to electrically connect the first pole of the first battery pack to be charged, and the fourth end of the battery management system is used to electrically connect the second pole of the first battery pack.

[0007] The communication network is used to send the external power supply information received from the external power source to the battery management system;

[0008] The battery management system is used to control a target object to perform a target charging operation on the first battery pack according to the external power supply information and the status message information received from the power module, and the target object includes the external power supply or the power module.

[0009] As an optional implementation, in the first aspect of the present application, the battery management system includes a switch control module and a power supply control module, wherein:

[0010] The output end of the switch control module and the first output end of the power supply control module are both used to electrically connect to the first pole of the first battery pack, the second output end of the power supply control module is used to electrically connect to the second pole of the first battery pack, the input end of the switch control module and the first input end of the power supply control module are both electrically connected to the first end of the communication network, and are both used to electrically connect to the first end of the external power supply and the first end of the power supply module, the second input end of the power supply control module is electrically connected to the second end of the communication network, and is used to electrically connect to the second end of the external power supply and the second end of the power supply module;

[0011] The switch control module is used to control the state of the switch control module according to the external power supply information and the status message information received from the power supply module, and the state of the switch control module includes an open state or a closed state;

[0012] The switch control module is also used to control the power supply control module to be turned on when the state of the switch control module is the disconnected state, so as to trigger the power supply control module to control the external power supply to perform a first charging operation on the first battery pack; when the state of the switch control module is the closed state, control the power supply module to be turned on to trigger the power supply module to perform a second charging operation on the first battery pack, and the target charging operation includes the first charging operation and / or the second charging operation.

[0013] As an optional implementation, in the first aspect of the present application, the switch control module controls the state of the switch control module according to the external power supply information and the status message information received from the power supply module, specifically including:

[0014] The switch control module detects first battery information of the first battery pack, and determines whether a current condition of the first battery pack meets a preset external power supply condition according to the first battery information and the external power supply information;

[0015] When it is determined that the external power-on condition is met, the switch control module controls the switch control module to enter a disconnected state;

[0016] In the process that the switch control module controls the external power supply to perform the first charging operation based on the disconnected state, the switch control module detects second battery information of the second battery pack, and determines whether the current condition of the first battery pack meets the preset internal charging condition according to the second battery information and the status message information received from the power module;

[0017] When it is determined that the current condition of the first battery pack meets the internal charging condition, the switch control module controls the switch control module to enter a closed state.

[0018] As an optional implementation, in the first aspect of the present application, the switch control module determines whether the current condition of the first battery pack meets the preset internal charging condition according to the second battery information and the status message information received from the power module, specifically including:

[0019] The switch control module determines the output voltage value required by the power module under the first battery information according to the second battery information and a preset output voltage table of the power module;

[0020] The switch control module determines whether the power module is in a normal output state according to the status message information received from the power module;

[0021] When it is determined that the power module is in the normal output state, the switch control module determines whether the real-time voltage values ​​included in the first battery information are all within the voltage range corresponding to the preset output voltage value within the preset continuous detection time;

[0022] When it is determined that the real-time voltage values ​​included in the first battery information are all within the voltage range within the continuous detection time, determining that the current condition of the first battery pack meets the preset internal charging condition;

[0023] When it is determined that the power module is not in the normal output state, and / or at least one of the real-time voltage values ​​contained in the first battery information within the continuous detection period is not within the voltage range, it is determined that the current condition of the first battery pack does not meet the preset internal charging condition.

[0024] As an optional implementation, in the first aspect of the present application, the power supply control module includes a current limiting module and a voltage dividing module, wherein:

[0025] The first output end of the current limiting module is used to electrically connect to the first pole of the first battery pack, the second output end of the current limiting module is electrically connected to the first end of the voltage divider module, and the second end of the voltage divider module is used to electrically connect to the second pole of the first battery pack, the first input end of the current limiting module is electrically connected to the first end of the communication network, and both are used to electrically connect to the first end of the external power supply and the first end of the power module, the second input end of the current limiting module is electrically connected to the second end of the communication network, and is used to electrically connect to the second end of the external power supply and the second end of the power module;

[0026] The voltage dividing module is used to divide the voltage with the first battery pack so that the potential of the first electrode of the first battery pack is higher than the potential of the second electrode;

[0027] The current limiting module is used to control the external power supply to output a first current for the first battery pack under the conduction control of the switch control module, and under the voltage dividing action of the voltage dividing module, direct the first current to flow from the target input end of the current limiting module to the first pole of the first battery pack, so as to realize the first charging operation of the external power supply on the first battery pack.

[0028] As an optional implementation, in the first aspect of the present application, the charging control system further includes the power module, and the power module includes a DC converter and a second battery pack, the voltage of the second battery pack is higher than the voltage of the first battery pack, wherein:

[0029] The first output end of the DC converter is electrically connected to the first input end of the current limiting module, the second output end of the DC converter is electrically connected to the second input end of the current limiting module, the first input end of the DC converter is used to electrically connect to the first pole of the second battery pack, and the second input end of the DC converter is used to electrically connect to the second pole of the second battery pack;

[0030] The DC converter is used to adjust the second current output by the second battery pack according to a preset charging current MAP value under the conduction control of the switch control module to obtain a third current, and to flow the third current to the first pole of the first battery pack through the switch control module to realize the second charging operation of the power supply module on the first battery pack.

[0031] As an optional embodiment, in the first aspect of the present application, the battery management system is provided with a CAN communication line, and the battery management system establishes a communication connection with the DC converter in the power module and the second battery pack in the power module through the CAN communication line. The battery management system is also used to process the battery status of the second battery pack and the operating status of the DC converter according to the CAN communication line.

[0032] The second aspect of the present application discloses a method for controlling battery charging of an electronic device based on an external power supply, the method being applied to a battery charging control system based on an external power supply, and the charging control system comprising a battery management system and a communication network, wherein:

[0033] The first end of the battery management system is electrically connected to the first end of the communication network, and is used to electrically connect the first end of the external power supply and the first end of the power module. The second end of the battery management system is electrically connected to the second end of the communication network, and is used to electrically connect the second end of the external power supply and the second end of the power module. The third end of the battery management system is used to electrically connect the first pole of the first battery pack to be charged, and the fourth end of the battery management system is used to electrically connect the second pole of the first battery pack.

[0034] And, the method comprises:

[0035] The communication network sends the external power supply information received from the external power source to the battery management system;

[0036] The battery management system controls a target object to perform a target charging operation on the first battery pack according to the external power supply information and the status message information received from the power module, and the target object includes the external power supply or the power module.

[0037] As an optional implementation, in the second aspect of the present application, the battery management system includes a switch control module and a power supply control module, wherein:

[0038] The output end of the switch control module and the first output end of the power supply control module are both used to electrically connect to the first pole of the first battery pack, the second output end of the power supply control module is used to electrically connect to the second pole of the first battery pack, the input end of the switch control module and the first input end of the power supply control module are both electrically connected to the first end of the communication network, and are both used to electrically connect to the first end of the external power supply and the first end of the power supply module, the second input end of the power supply control module is electrically connected to the second end of the communication network, and is used to electrically connect to the second end of the external power supply and the second end of the power supply module;

[0039] And, the battery management system controls the target object to perform a target charging operation on the first battery pack according to the external power supply information and the status message information received from the power module, including:

[0040] The switch control module controls the state of the switch control module according to the external power supply information and the state message information received from the power supply module, and the state of the switch control module includes an open state or a closed state;

[0041] When the state of the switch control module is the disconnected state, the switch control module controls the power supply control module to be turned on, so as to trigger the power supply control module to control the external power supply to perform a first charging operation on the first battery pack; when the state of the switch control module is the closed state, the power supply module is controlled to be turned on, so as to trigger the power supply module to perform a second charging operation on the first battery pack.

[0042] A third aspect of the present application discloses a battery system, which includes a battery charging control system based on an external power supply as described in any one of the first aspects of the present application.

[0043] Compared with the prior art, the embodiments of the present application have the following beneficial effects:

[0044] In an embodiment of the present application, a battery charging control system based on an external power supply is provided, the charging control system includes a battery management system and a communication network, wherein a first end of the battery management system is electrically connected to a first end of the communication network, and is used to electrically connect a first end of the external power supply and a first end of a power module, a second end of the battery management system is electrically connected to a second end of the communication network, and is used to electrically connect a second end of the external power supply and a second end of the power module, a third end of the battery management system is used to electrically connect a first pole of a first battery pack to be charged, and a fourth end of the battery management system is used to electrically connect a second pole of the first battery pack; the communication network is used to send external power supply information received from the external power supply to the battery management system; the battery management system is used to control a target object to perform a target charging operation on the first battery pack according to the external power supply information and the status message information received from the power module, and the target object includes the external power supply or the power module. It can be seen that the implementation of this application can send the external power supply information received from the external power supply to the battery management system through the communication network, and control the target object to perform the target charging operation on the first battery pack according to the external power supply information and the status message information received from the power module through the battery management system. This solution provides an efficient, automated charging control system that can switch charging among multiple power sources. The battery management system can flexibly select an external power supply or a power module inside an electronic device to charge the battery pack according to the power supply information of the external power supply and the status message of the power module, which is conducive to realizing flexible and precise switching of the power supply used to power the battery pack, so as to realize precise charging of the battery pack, thereby helping to reduce the occurrence of battery loss caused by charging the battery pack through an unsuitable power source. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0046] Figure 1 It is a structural schematic diagram of a battery charging control system based on an external power supply disclosed in an embodiment of the present application;

[0047] Figure 2 It is a structural schematic diagram of a battery management system disclosed in an embodiment of the present application;

[0048] Figure 3It is a structural schematic diagram of another electronic device battery charging control structure based on an external power supply disclosed in an embodiment of the present application;

[0049] Figure 4 It is a structural schematic diagram of another electronic device battery charging control structure based on an external power supply disclosed in an embodiment of the present application;

[0050] Figure 5 It is a flow chart of a method for controlling battery charging of an electronic device based on an external power supply disclosed in an embodiment of the present application;

[0051] Figure 6 It is a structural schematic diagram of a battery system disclosed in an embodiment of the present application. DETAILED DESCRIPTION

[0052] For better understanding and implementation, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0053] It should be noted that, unless otherwise clearly specified and limited, the term "electrical connection" in the specification and claims of the present invention and the above-mentioned drawings should be understood in a broad sense. For example, it can be a fixed electrical connection, a detachable electrical connection, or an integral electrical connection; it can be a mechanical electrical connection, an electrical electrical connection, or can communicate with each other; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. In addition, the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order. The terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0054] The present application discloses a battery charging control system, method and battery system based on an external power supply, which can send the external power supply information received from the external power supply to the battery management system through a communication network, and control the target object to perform a target charging operation on the first battery pack according to the external power supply information and the status message information received from the power module through the battery management system. This solution provides an efficient and automated charging control system that can switch charging among multiple power supplies. The battery management system can flexibly select an external power supply or a power module inside an electronic device to charge the battery pack according to the power supply information of the external power supply and the status message of the power module, which is conducive to realizing flexible and accurate switching of the power supply used to power the battery pack, so as to realize accurate charging of the battery pack, thereby helping to reduce the occurrence of battery loss caused by charging the battery pack through an unsuitable power supply. The following are detailed descriptions.

[0055] Embodiment 1

[0056] See also Figure 1 , Figure 1 : is a schematic diagram of a battery charging control system based on an external power supply disclosed in an embodiment of the present application. Figure 1 The battery charging control system based on an external power supply described above can be applied to any electronic product (such as a tram) that requires charging control, and the present application embodiment does not limit this. Figure 1 As shown, the electronic device battery charging control system based on an external power source may include a battery management system 101 and a communication network 102, wherein:

[0057] A first end of the battery management system 101 is electrically connected to a first end of the communication network 102, and is used to electrically connect a first end of an external power source and a first end of a power module 103; a second end of the battery management system 101 is electrically connected to a second end of the communication network 102, and is used to electrically connect a second end of an external power source and a second end of the power module 103; a third end of the battery management system 101 is used to electrically connect a first pole of a first battery pack 104 to be charged; and a fourth end of the battery management system 101 is used to electrically connect a second pole of the first battery pack 104;

[0058] The communication network 102 is used to send the external power supply information received from the external power source to the battery management system 101;

[0059] The battery management system 101 is used to control the target object to perform a target charging operation on the first battery pack 104 according to the external power supply information and the status message information received from the power module 103 .

[0060] In an embodiment of the present invention, optionally, the external power supply may include a jump starter kit, or may include a direct current power supply (such as a 220V AC to DC power supply). Optionally, the external power supply information of the external power supply may include information that the external power supply is in a connected state with the battery management system 101 and can supply power to the first battery pack 104 through the battery management system 101, or information that the external power supply is in a disconnected state with the battery management system 101 and cannot supply power to the first battery pack 104 through the battery management system 101. The status message information of the power module 103 may include message information that the power module 103 is in a normal output state, or message information that the power module 103 is in an abnormal output state. The target object includes an external power supply or a power module 103, and the target charging operation may include a first charging operation based on the power module 103 and / or a second charging operation based on the external power supply, which is not limited in the embodiment of the present invention.

[0061] Specifically, when the external power supply information is information that the external power supply and the battery management system 101 are in a connected state and can supply power to the first battery pack 104 through the battery management system 101, the battery management system 101 can control the external power supply to perform a second charging operation on the first battery; when the external power supply information is information that the external power supply and the battery management system 101 are in a disconnected state and cannot supply power to the first battery pack 104 through the battery management system 101, the battery management system 101 can control the power module 103 to perform a first charging operation on the first battery pack 104.

[0062] It can be seen that implementation Figure 1 The described battery charging control system based on an external power supply can send the external power supply information received from the external power supply to the battery management system 101 through the communication network 102, and control the target object to perform the target charging operation on the first battery pack 104 according to the external power supply information and the status message information received from the power module 103 through the battery management system 101. This solution provides an efficient, automated charging control system that can switch charging among multiple power sources. The battery management system 101 can flexibly select an external power supply or a power module 103 inside an electronic device to charge the battery pack according to the power supply information of the external power supply and the status message of the power module 103, which is conducive to realizing flexible and precise switching of the power source used to power the battery pack, so as to realize precise charging of the battery pack, thereby helping to reduce the occurrence of battery loss caused by charging the battery pack through an inappropriate power source.

[0063] In an optional embodiment, if Figure 2 As shown, Figure 2 is a schematic diagram of the structure of a battery management system 101 disclosed in an embodiment of the present application, such as Figure 2As shown, the battery management system 101 includes a switch control module 1011 and a power supply control module 1012, wherein:

[0064] The output end of the switch control module 1011 and the first output end of the power supply control module 1012 are both used to electrically connect to the first pole of the first battery pack 104, the second output end of the power supply control module 1012 is used to electrically connect to the second pole of the first battery pack 104, the input end of the switch control module 1011 and the first input end of the power supply control module 1012 are both electrically connected to the first end of the communication network 102, and are both used to electrically connect to the first end of the external power supply and the first end of the power supply module 103, the second input end of the power supply control module 1012 is electrically connected to the second end of the communication network 102, and is used to electrically connect to the second end of the external power supply and the second end of the power supply module 103;

[0065] The switch control module 1011 is used to control the state of the switch control module 1011 according to the external power supply information and the state message information received from the power supply module 103. The state of the switch control module 1011 includes an open state or a closed state;

[0066] The switch control module 1011 is also used to control the power supply control module 1012 to be turned on when the switch control module 1011 is in an open state, so as to trigger the power supply control module 1012 to control the external power supply to perform a first charging operation on the first battery pack 104; when the switch control module 1011 is in a closed state, control the power supply module 103 to be turned on, so as to trigger the power supply module 103 to perform a second charging operation on the first battery pack 104, and the target charging operation includes the first charging operation and / or the second charging operation.

[0067] In the embodiment of the present invention, the switch control module 1011 may optionally include control components in the BMS (battery management system 101), such as: circuit breakers (CB), relays, fuses, etc., for controlling the charging and discharging process of the battery, protecting the battery from abnormal conditions such as overload and short circuit, and may also include the central processing unit (ECU) of the BMS, which is not limited in the embodiment of the present invention. Specifically, the power supply control module 1012, under the conduction control of the switch control module 1011, controls the external power supply to perform the second charging operation on the first battery pack 104, which may specifically include:

[0068] Under the conduction control of the switch control module 1011, the power supply control module 1012 controls the external power supply to output a first current for the first battery pack 104, and directs the first current from the target input terminal of the current limiting module 10121 to the first pole of the first battery pack 104, so as to implement a first charging operation of the external power supply on the first battery pack 104. Optionally, the target input terminal of the current limiting module 10121 may include the first input terminal of the current limiting module 10121 and / or the second input terminal of the current limiting module 10121.

[0069] It can be seen that this optional embodiment can control the state of the switch control module 1011 according to the external power supply information and the status message information received from the power supply module 103 through the switch control module 1011, and can improve the control accuracy and efficiency of the state of the switch control module 1011 according to the power supply information of the external power supply and the message information of the internal power supply module 103 through the switch control module 1011; and when the state of the switch control module 1011 is the disconnected state, the power supply control module 1012 is turned on through the switch control module 1011, and when the state of the switch control module 1011 is the closed state, the power supply control module 1012 is triggered. 1012 controls the external power supply to perform the first charging operation on the first battery pack 104, and controls the power supply module 103 to be turned on through the switch control module 1011, so as to trigger the power supply module 103 to perform the first charging operation on the first battery pack 104. The control accuracy and flexibility of whether the power supply control module 1012 is turned on by the switch control module 1011 can be improved based on the state of the switch control module 1011, which is conducive to the flexible and accurate selection of the external power supply and the internal power supply module 103 based on the accurately controlled state of the power supply control module 1012, thereby facilitating the improvement of the charging accuracy of the first battery pack 104 based on the accurately selected power supply.

[0070] In this optional embodiment, as an optional implementation, the switch control module 1011 controls the state of the switch control module 1011 according to the external power supply information and the state message information received from the power supply module 103, which may specifically include:

[0071] The switch control module 1011 detects the first battery information of the first battery pack 104, and determines whether the current condition of the first battery pack 104 meets the preset external power supply condition according to the first battery information and the external power supply information;

[0072] When it is determined that the external grounding condition is met, the switch control module 1011 controls the switch control module 1011 to enter the disconnected state;

[0073] In the process that the switch control module 1011 controls the external power supply to perform the first charging operation based on the disconnected state, the switch control module 1011 detects the second battery information of the second battery pack 1032, and determines whether the current condition of the first battery pack 104 meets the preset internal charging condition according to the second battery information and the status message information received from the power module 103;

[0074] When it is determined that the current condition of the first battery pack 104 meets the internal charging condition, the switch control module 1011 controls the switch control module 1011 to enter a closed state.

[0075] In the embodiment of the present invention, the switch control module 1011 determines whether the current condition of the first battery pack 104 meets the preset external power supply condition according to the first battery information and the external power supply information, which may specifically include:

[0076] The switch control module 1011 determines whether the first battery pack 104 is in a preset power-deficient state according to the first battery information;

[0077] When it is determined that the first battery pack 104 is in a power-deficient state, the switch control module 1011 determines, based on the external power supply information, whether the external power supply information includes information that the external power supply is connected to the battery management system 101 and can supply power to the first battery pack 104 through the battery management system 101;

[0078] When it is determined that the external power supply information includes information that the external power source is connected to the battery management system 101 and can supply power to the first battery pack 104 through the battery management system 101, the switch control module 1011 determines that the current condition of the first battery pack 104 meets the preset external power supply condition;

[0079] When it is determined that the first battery pack 104 is not in a power-deficient state, and / or the external power supply information does not include information that the external power source is connected to the battery management system 101 and can supply power to the first battery pack 104 through the battery management system 101, the switch control module 1011 determines that the current condition of the first battery pack 104 does not meet the preset external power-on condition. This improves the control accuracy and reliability of the switch control module 1011 entering the disconnected state.

[0080] It can be seen that this optional implementation can detect the first battery information of the first battery pack 104 through the switch control module 1011, and determine whether the current condition of the first battery pack 104 meets the preset external charging condition based on the first battery information and the external power supply information. When it is determined that it meets the external charging condition, the switch control module 1011 is directly controlled to enter the disconnected state, thereby improving the control accuracy and efficiency of the switch control module 1011 entering the disconnected state; and detect the second battery information of the second battery pack 1032 during the first charging operation, and determine whether the current condition of the first battery pack 104 meets the preset internal charging condition based on the second battery information and the status message information received from the power module 103. When it is determined that the current condition of the first battery pack 104 meets the internal charging condition, the switch control module 1011 is controlled to enter the closed state, thereby improving the control accuracy and reliability of the switch control module 1011 entering the closed state, and can improve the control reliability, flexibility and accuracy of the state of the switch control module 1011 based on the information of the first battery pack 104 and the status message information of the power module 103.

[0081] In this optional implementation, the switch control module 1011 may determine whether the current condition of the first battery pack 104 meets the preset internal charging condition according to the second battery information and the status message information received from the power module 103, which may specifically include:

[0082] The switch control module 1011 determines the output voltage value required by the power module 103 under the first battery information according to the second battery information and the preset output voltage table of the power module 103;

[0083] The switch control module 1011 determines whether the power module 103 is in a normal output state according to the status message information received from the power module 103;

[0084] When it is determined that the power module 103 is in a normal output state, the switch control module 1011 determines whether the real-time voltage values ​​included in the first battery information are all within the voltage range corresponding to the preset output voltage value within the preset continuous detection time;

[0085] When it is determined that the real-time voltage values ​​included in the first battery information are all within the voltage range within the continuous detection time, it is determined that the current condition of the first battery pack 104 meets the preset internal charging condition;

[0086] When it is determined that the power module 103 is not in a normal output state, and / or at least one of the real-time voltage values ​​contained in the first battery information within the continuous detection period is not within the voltage range, it is determined that the current condition of the first battery pack 104 does not meet the preset internal charging conditions.

[0087] Exemplarily, the BMS (battery management system 101), especially the switch control module 1011 in the BMS, determines whether the current total internal voltage contained in the second battery information of the first battery pack 104 reaches 12V based on the second battery information, and when it is determined that the preset voltage value is reached, according to the output voltage table of the DCDC (direct current converter 1031) in the preset power module 103, the BMS looks up the table to determine the current battery status information (such as: the MOS tube of the charging branch where the battery is located is disconnected, the temperature of the environment where the battery is located, and the SOC state of the battery) contained in the second battery information, The theoretical output voltage value of DCDC is used as the output voltage value required by the power module 103 under the first battery information; then, by identifying the power module 103, and judge whether DCDC is in a normal output state. When it is judged that DCDC is in a normal output state, judge whether the current external total voltage contained in the second battery information of the first battery pack 104 is within the range of ±0.6V of the theoretical output voltage value of DCDC, and whether the current external total voltage lasts for 5 seconds in the range (used to indicate whether the charging state is stable). When it is judged that the current external total voltage is within the range of ±0.6V of the theoretical output voltage value of DCDC and the current external total voltage lasts for 5 seconds in the range, close the switch control module 1011 to exit the current limiting module 10121, thereby closing the charge and discharge loop for charging the first battery pack 104 through the power supply module 103.

[0088] It can be seen that this optional implementation can also determine the output voltage value required by the power module 103 under the first battery information through the switch control module 1011 according to the second battery information and the preset output voltage table of the power module 103, and can improve the accuracy and efficiency of determining the output voltage value used as a basis for judging whether the battery pack meets the requirements of being charged by the power module 103 based on the preset output voltage table and the current information of the battery pack, and judge whether the power module 103 is in a normal output state according to the status message information received from the power module 103. When it is judged that the power module 103 is in a normal output state, the switch control module 1011 judges whether the real-time voltage values ​​included in the first battery information are all in a normal output state within the preset continuous detection time. Within the voltage range corresponding to the preset output voltage value, when it is determined that the real-time voltage values ​​included in the first battery information within the continuous detection time are all within the voltage range, it is determined that the current condition of the first battery pack 104 meets the preset internal charging condition, which can improve the accuracy and reliability of determining that the battery pack meets the charging requirements of the power module 103 when the power module 103 outputs normally. When it is determined that the power module 103 is not in a normal output state, and / or at least one of the real-time voltage values ​​included in the first battery information within the continuous detection time is not within the voltage range, it is determined that the current condition of the first battery pack 104 does not meet the preset internal charging condition, which can improve the speed and efficiency of determining that the battery pack does not meet the charging requirements of the power module 103.

[0089] In this optional embodiment, as another optional implementation, as Figure 2 As shown, the power supply control module 1012 includes a current limiting module 10121 and a voltage dividing module 10122, wherein:

[0090] The first output end of the current limiting module 10121 is used to electrically connect to the first pole of the first battery pack 104, the second output end of the current limiting module 10121 is electrically connected to the first end of the voltage dividing module 10122, and the second end of the voltage dividing module 10122 is used to electrically connect to the second pole of the first battery pack 104, the first input end of the current limiting module 10121 is electrically connected to the first end of the communication network 102, and both are used to electrically connect to the first end of the external power supply and the first end of the power module 103, the second input end of the current limiting module 10121 is electrically connected to the second end of the communication network 102, and is used to electrically connect to the second end of the external power supply and the second end of the power module 103;

[0091] A voltage dividing module 10122, configured to divide the voltage with the first battery pack 104, so that the potential of the first electrode of the first battery pack 104 is higher than the potential of the second electrode;

[0092] The current limiting module 10121 is used to control the external power supply to output a first current for the first battery pack 104 under the conduction control of the switch control module 1011, and under the voltage dividing action of the voltage dividing module 10122, the first current flows from the target input end of the current limiting module 10121 to the first pole of the first battery pack 104, so as to realize the first charging operation of the external power supply on the first battery pack 104.

[0093] In an embodiment of the present invention, optionally, the voltage divider module 10122 may include one or more voltage divider resistors, and may also include capacitors connected in parallel / series with the resistors for energy storage and filtering to help stabilize the voltage output, which is not limited in the embodiment of the present invention.

[0094] Exemplarily, when the first battery pack 104 (such as a 12V battery pack) is depleted and the power supply is disconnected, and an external power supply is used (such as a jumper / DC power supply), the BMS first starts the current limiting mode, such as: disconnecting the switch control module 1011 to turn on the current limiting module 10121. At this time, a stable small current (such as 2A) is output through the current limiting module 10121 to charge the battery, wherein the current limiting module 10121 is an integrated chip integrated on the BMS board of the low-voltage battery pack.

[0095] It can be seen that this optional implementation can be used to divide the voltage with the first battery pack 104 through the voltage divider module 10122, so that the potential of the first pole of the first battery pack 104 is higher than the potential of the second pole, which is beneficial to achieve precise control of the current direction in the circuit through the voltage dividing effect of the voltage divider module 10122, and through the current limiting module 10121 under the conduction control of the switch control module 1011, the external power supply is controlled to output the first current for the first battery pack 104, and under the voltage dividing effect of the voltage divider module 10122, the first current is directed from the target input end of the current limiting module 10121 to the first pole of the first battery pack 104, so as to achieve the first charging operation of the external power supply on the first battery pack 104, and the control accuracy and reliability of the external power supply charging the first battery pack 104 can be improved based on the voltage divider module 10122 and the current limiting module 10121, and the small current charging output by the current limiting module 10121 is beneficial to avoid the situation where the battery pack is charged with a large current and the battery pack is impacted.

[0096] The working principle of the battery charging control system based on the external power supply in the embodiment of the present invention is as follows:

[0097] When the first battery pack 104 (such as a 12V battery pack) is low on power and the power supply is disconnected, when the external power supply (such as a jump-starter / DC power supply) is detected through the communication network 102, the switch control module 1011 (CB module) is in a disconnected state, and can control the current limiting module 10121 to be turned on. At this time, a stable small current is output by the current limiting module 10121 to charge the battery. When the total internal voltage of the first battery pack 104 is charged to more than 12V, according to the originally set DC converter 1031 (i.e., DCDC) output voltage table, the BMS looks up the table to determine the current state of the first battery pack 104 (loop MOS disconnection, battery ambient temperature, battery SOC state ) under the condition that the theoretical output voltage value of DCDC is 0.6V; and the status message of DCDC is identified through the communication network 102 to determine whether DCDC is in a normal output state; when DCDC is in a normal output state, it is determined whether the current external total voltage of the first battery pack 104 is within the range of ±0.6V of the theoretical output voltage value of DCDC and the duration of the current external total voltage being in this range reaches 5 seconds. When the judgment result is yes, the switch control module 1011 is closed through the BMS control to exit the current limiting mode, and the charge and discharge circuit between the second battery pack 1032 (1032) in the power module 103 and the first battery pack 104 is closed to enter a normal charging state. It can be seen that the present solution provides an efficient and automated charging control system that can switch charging among multiple power sources. The battery management system 101 can flexibly select an external power source or a power module 103 inside an electronic device to charge the battery pack according to the power supply information of the external power source and the status message of the power module 103, which is conducive to realizing flexible and accurate switching of the power source used to power the battery pack, so as to realize accurate charging of the battery pack, thereby helping to reduce the occurrence of battery loss caused by charging the battery pack through an inappropriate power source.

[0098] Embodiment 2

[0099] See also Figure 3 , Figure 3 is a schematic diagram of another battery charging control system based on an external power supply disclosed in an embodiment of the present application. Figure 3 The battery charging control system based on an external power supply described above can be applied to any electronic product (such as a tram) that requires charging control, and the present application embodiment does not limit this. Figure 3 As shown, in Figure 1Based on the structure of the battery charging control system based on the external power supply shown in the figure, the charging control system can also include a power supply module 103, an electrical connection relationship between the battery management system 101 of the charging control system and the communication network 102, an electrical connection relationship between the switch control module 1011 of the battery management system 101 and the power supply control module 1012, and an electrical connection relationship between the current limiting module 10121 and the voltage dividing module 10122 of the power supply control module 1012, please refer to the embodiment 1 Figure 1-2 The description of , will not be repeated here. Figure 3 As shown, the power module 103 may include a DC converter 1031 and a second battery pack 1032, and the voltage of the second battery pack 1032 is higher than the voltage of the first battery pack 104, wherein:

[0100] The first output end of the DC converter 1031 is electrically connected to the first input end of the current limiting module 10121, the second output end of the DC converter 1031 is electrically connected to the second input end of the current limiting module 10121, the first input end of the DC converter 1031 is used to electrically connect to the first pole of the second battery pack 1032, and the second input end of the DC converter 1031 is used to electrically connect to the second pole of the second battery pack 1032;

[0101] The DC converter 1031 is used to adjust the second current output by the second battery pack 1032 according to a preset charging current MAP value under the conduction control of the switch control module 1011 to obtain a third current, and to flow the third current to the first pole of the first battery pack 104 through the switch control module 1011 to realize the second charging operation of the power module 103 on the first battery pack 104.

[0102] In the embodiment of the present invention, the charging current MAP value is used to indicate the maximum allowable current value of the charging current output by the DC converter 1031 .

[0103] In an embodiment of the present invention, the battery management system 101 is provided with a CAN communication line, and the battery management system 101 establishes a communication connection with the DC converter 1031 in the power module 103 and the second battery pack 1032 in the power module 103 through the CAN communication line. The battery management system 101 is also used to process the battery status of the second battery pack 1032 and the operating status of the DC converter 1031 according to the CAN communication line. For example, through the CAN communication line, the battery management system 101 realizes at least one of the functions of collecting, monitoring and controlling the battery status of the second battery pack 1032 and the operating status of the DC converter 1031.

[0104] It can be seen that implementation Figure 3The described battery charging control system based on an external power supply can adjust the second current output by the second battery pack 1032 according to a preset charging current MAP value under the conduction control of the switch control module 1011 through the DC converter 1031 to obtain a third current, and make the third current flow to the first pole of the first battery pack 104 through the switch control module 1011 to realize the second charging operation of the power module 103 on the first battery pack 104, and can improve the control accuracy and efficiency of the charging current output by the DC converter 1031 on the high-voltage battery pack when the high-voltage battery pack in the power module 103 is selected to charge the low-voltage battery pack, which is beneficial to improving the charging accuracy and charging efficiency of the above-mentioned high-voltage battery pack on the low-voltage battery pack through the DC converter 1031.

[0105] like Figure 4 As shown, Figure 4 is a structural diagram of another battery charging control system based on an external power supply disclosed in an embodiment of the present invention, combined with Figure 4 The working principle of the battery charging control system based on the external power supply in the embodiment of the present invention is as follows:

[0106] When the first battery pack 104 (i.e. Figure 4 When the low-voltage battery pack in the power supply is low and the power supply is disconnected, the switch control module 1011 (i.e. Figure 4 CB in the circuit is in the disconnected state, and the current limiting module 10121 can be controlled to be turned on. At this time, the current limiting module 10121 outputs a stable small current to charge the battery. When the total internal voltage of the low-voltage battery pack is charged to above 12V, the DC converter 1031 (i.e. Figure 4 The BMS looks up the table to determine the theoretical output voltage value of the DCDC under the current state of the low-voltage battery pack (loop MOS disconnection, battery ambient temperature, battery SOC state); and through the CAN communication line (i.e. Figure 4 The CAN Network in the DCDC, wherein the CAN Network may include a CANH communication line and a CANL communication line) identifies the status message of the DCDC and determines whether the DCDC is in a normal output state; when the DCDC is in a normal output state, determines whether the current external total voltage of the low-voltage battery pack is within a voltage range (such as ±0.6V) corresponding to the theoretical output voltage value of the DCDC and whether the duration of the current external total voltage in the range reaches a preset duration (such as 5 seconds). When the judgment result is yes, the BMS controls the switch control module 1011 to close to exit the current limiting mode, and enables the second battery pack 1032 (i.e., Figure 4The charge and discharge circuit between the high-voltage battery pack in the power module 103 and the low-voltage battery pack is closed and enters the normal charging state. At this time, the DCDC in the power module 103 controls the current output by the high-voltage battery pack according to the set charging MAP to realize the charging control of the low-voltage battery. It can be seen that this scheme provides an efficient and automated charging control system that can switch charging among multiple power sources. It can flexibly select an external power source or the power module 103 inside the electronic device to charge the battery pack according to the power supply information of the external power source and the status message of the power module 103 through the battery management system 101, which is conducive to realizing flexible and accurate switching of the power source used to power the battery pack, so as to realize accurate charging of the battery pack, thereby helping to reduce the occurrence of battery loss caused by charging the battery pack through an unsuitable power source.

[0107] Embodiment 3

[0108] See also Figure 5 , Figure 5 1 is a flow chart of a method for controlling the battery charging of an electronic device based on an external power supply disclosed in an embodiment of the present application. Figure 5 The described electronic device battery charging control method based on an external power supply can be applied to an electronic device battery charging control system based on an external power supply, and the electronic device battery charging control system based on an external power supply can be applied to any electronic product that needs to be charged (such as electric vehicles), and the charging control system may include a battery management system and a communication network, wherein a first end of the battery management system is electrically connected to a first end of the communication network, and is used to electrically connect the first end of the external power supply and the first end of the power module, a second end of the battery management system is electrically connected to a second end of the communication network, and is used to electrically connect the second end of the external power supply and the second end of the power module, a third end of the battery management system is used to electrically connect the first pole of the first battery pack to be charged, and a fourth end of the battery management system is used to electrically connect the second pole of the first battery pack, which is not limited in the embodiments of the present application. Figure 5 As shown, the electronic device battery charging control method based on an external power supply may include the following operations:

[0109] 201. The communication network sends external power supply information received from the external power source to a battery management system.

[0110] 202. The battery management system controls the target object to perform a target charging operation on the first battery pack according to the external power supply information and the status message information received from the power module.

[0111] In the embodiment of the present invention, the target object includes an external power supply or a power supply module.

[0112] It should be noted that, for other related descriptions of the charging control system, please refer to other descriptions of the charging control system in Embodiment 1 or Embodiment 2, which will not be repeated here.

[0113] It can be seen that implementation Figure 5 The described electronic device battery charging control method based on an external power supply can send the external power supply information received from the external power supply to the battery management system through a communication network, and control the target object to perform a target charging operation on the first battery pack according to the external power supply information and the status message information received from the power module through the battery management system. This scheme provides an efficient, automated charging control system that can switch charging among multiple power sources. The battery management system can flexibly select an external power supply or a power module inside the electronic device to charge the battery pack according to the power supply information of the external power supply and the status message of the power module, which is conducive to realizing flexible and accurate switching of the power supply used to power the battery pack, so as to realize accurate charging of the battery pack, thereby helping to reduce the occurrence of battery loss caused by charging the battery pack through an unsuitable power source.

[0114] In an optional embodiment, the battery management system may include a switch control module and a power supply control module, wherein the output end of the switch control module and the first output end of the power supply control module are both used to electrically connect to the first pole of the first battery pack, the second output end of the power supply control module is used to electrically connect to the second pole of the first battery pack, the input end of the switch control module and the first input end of the power supply control module are both electrically connected to the first end of the communication network, and are both used to electrically connect to the first end of the external power supply and the first end of the power supply module, and the second input end of the power supply control module is electrically connected to the second end of the communication network, and is used to electrically connect to the second end of the external power supply and the second end of the power supply module. And, the battery management system of the above step 202 controls the target object to perform the target charging operation on the first battery pack according to the external power supply information and the status message information received from the power supply module, which may include:

[0115] The switch control module controls the state of the switch control module according to the external power supply information and the state message information received from the power supply module. The state of the switch control module includes an open state or a closed state.

[0116] When the state of the switch control module is the disconnected state, the switch control module controls the power supply control module to be turned on, so as to trigger the power supply control module to control the external power supply to perform a first charging operation on the first battery pack; when the state of the switch control module is the closed state, the power supply module is controlled to be turned on, so as to trigger the power supply module to perform a second charging operation on the first battery pack, and the target charging operation includes the first charging operation and / or the second charging operation.

[0117] It can be seen that this optional embodiment can control the state of the switch control module according to the external power supply information and the status message information received from the power supply module through the switch control module, and can improve the control accuracy and efficiency of the state of the switch control module according to the power supply information of the external power supply and the message information of the internal power supply module through the switch control module; and when the state of the switch control module is in the disconnected state, the power supply control module is controlled to be turned on through the switch control module, and when the state of the switch control module is in the closed state, the power supply control module is triggered to control the external power supply to perform a first charging operation on the first battery pack, and the power supply module is controlled to be turned on through the switch control module to trigger the power supply module to perform the first charging operation on the first battery pack, which can improve the control accuracy and flexibility of the switch control module on whether the power supply control module is turned on based on the state of the switch control module, which is conducive to realizing flexible and accurate selection of the external power supply and the internal power supply module based on the accurately controlled state of the power supply control module, thereby facilitating improving the charging accuracy of the first battery pack based on the accurately selected power supply.

[0118] Embodiment 4

[0119] See also Figure 6 , Figure 6 It is a structural schematic diagram of a battery system disclosed in an embodiment of the present application. The battery system is an electronic product provided with a battery charging control system based on an external power supply. The battery system includes a battery charging control system based on an external power supply as in Embodiment 1 of the present application and is used to implement an electronic device battery charging control method based on an external power supply in Embodiment 2 of the present application. It should be noted that for a detailed description of the battery charging control system based on an external power supply, please refer to the specific description of the relevant contents in Embodiment 1 and Embodiment 2, and for an electronic device battery charging control method based on an external power supply, please refer to the specific description of the relevant contents in Embodiment 3, which will not be repeated in this embodiment.

[0120] It can be seen that implementation Figure 5 The described battery system can send the external power supply information received from the external power supply to the battery management system through the communication network, and control the target object to perform the target charging operation on the first battery pack according to the external power supply information and the status message information received from the power module through the battery management system. The present solution provides an efficient and automated charging control system that can switch charging among multiple power sources. The battery management system can flexibly select the external power supply or the power module inside the electronic device to charge the battery pack according to the power supply information of the external power supply and the status message of the power module, which is conducive to realizing flexible and precise switching of the power supply used to power the battery pack, so as to realize precise charging of the battery pack, thereby helping to reduce the occurrence of battery loss caused by charging the battery pack through an unsuitable power source.

[0121] The above is a detailed introduction to a battery charging control system, method and battery system based on an external power supply disclosed in an embodiment of the present application. Specific embodiments are used in this article to illustrate the principles and implementation methods of the present application, but the above preferred embodiments are not used to limit the present application. The description of the above embodiments is only used to help understand the method of the present application and its core idea; at the same time, for a general technician in this field, based on the idea of ​​the present application, there will be changes in the specific implementation method and application scope without departing from the spirit and scope of the present application. Therefore, the scope of protection of the present application shall be based on the scope defined in the claims.

Claims

1. A battery charging control system based on an external power supply, characterized in that: The charging control system comprises a battery management system (101) and a communication network (102), wherein: The first end of the battery management system (101) is electrically connected to the first end of the communication network (102), and is used to electrically connect the first end of the external power supply and the first end of the power module (103); the second end of the battery management system (101) is electrically connected to the second end of the communication network (102), and is used to electrically connect the second end of the external power supply and the second end of the power module (103); the third end of the battery management system (101) is used to electrically connect the first pole of the first battery pack (104) to be charged; and the fourth end of the battery management system (101) is used to electrically connect the second pole of the first battery pack (104); The communication network (102) is used to send the external power supply information received from the external power source to the battery management system (101); The battery management system (101) is used to control a target object to perform a target charging operation on the first battery pack (104) based on the external power supply information and the status message information received from the power module (103), wherein the target object includes the external power supply or the power module (103).

2. The battery charging control system based on external power supply according to claim 1, characterized in that: The battery management system (101) comprises a switch control module (1011) and a power supply control module (1012), wherein: The output end of the switch control module (1011) and the first output end of the power supply control module (1012) are both used to electrically connect to the first pole of the first battery pack (104); the second output end of the power supply control module (1012) is used to electrically connect to the second pole of the first battery pack (104); the input end of the switch control module (1011) and the first input end of the power supply control module (1012) are both electrically connected to the first end of the communication network (102), and are both used to electrically connect to the first end of the external power supply and the first end of the power supply module (103); the second input end of the power supply control module (1012) is electrically connected to the second end of the communication network (102), and is used to electrically connect to the second end of the external power supply and the second end of the power supply module (103); The switch control module (1011) is used to control the state of the switch control module (1011) according to the external power supply information and the state message information received from the power supply module (103), wherein the state of the switch control module (1011) includes an open state or a closed state; The switch control module (1011) is further configured to control the power supply control module (1012) to be turned on when the state of the switch control module (1011) is the disconnected state, so as to trigger the power supply control module (1012) to control the external power supply to perform a first charging operation on the first battery pack (104); and to control the power supply module (103) to be turned on when the state of the switch control module (1011) is the closed state, so as to trigger the power supply module (103) to perform a second charging operation on the first battery pack (104), wherein the target charging operation includes the first charging operation and / or the second charging operation.

3. The battery charging control system based on external power supply according to claim 2, characterized in that: The switch control module (1011) controls the state of the switch control module (1011) according to the external power supply information and the state message information received from the power supply module (103) in a manner that specifically includes: The switch control module (1011) detects first battery information of the first battery pack (104), and determines whether a current condition of the first battery pack (104) satisfies a preset external power supply condition based on the first battery information and the external power supply information; When it is determined that the external power-on condition is met, the switch control module (1011) controls the switch control module (1011) to enter a disconnected state; In the process in which the switch control module (1011) controls the external power supply to perform the first charging operation based on the disconnected state, the switch control module (1011) detects second battery information of the second battery pack (1032), and determines whether the current condition of the first battery pack (104) meets a preset internal charging condition based on the second battery information and the status message information received from the power supply module (103); When it is determined that the current condition of the first battery pack (104) meets the internal charging condition, the switch control module (1011) controls the switch control module (1011) to enter a closed state.

4. The battery charging control system based on external power supply according to claim 3, characterized in that: The switch control module (1011) determines whether the current condition of the first battery pack (104) meets the preset internal charging condition based on the second battery information and the status message information received from the power module (103), specifically comprising: The switch control module (1011) determines the output voltage value required by the power module (103) under the first battery information according to the second battery information and a preset output voltage table of the power module (103); The switch control module (1011) determines whether the power module (103) is in a normal output state according to the status message information received from the power module (103); When it is determined that the power module (103) is in the normal output state, the switch control module (1011) determines whether the real-time voltage values ​​included in the first battery information are all within a preset voltage range corresponding to the output voltage value within a preset continuous detection time period; When it is determined that the real-time voltage values ​​included in the first battery information are all within the voltage range within the continuous detection time, determining that the current condition of the first battery pack (104) meets the preset internal charging condition; When it is determined that the power module (103) is not in the normal output state, and / or at least one of the real-time voltage values ​​contained in the first battery information within the continuous detection time is not within the voltage range, it is determined that the current condition of the first battery pack (104) does not meet the preset internal charging condition.

5. The battery charging control system based on an external power supply according to any one of claims 2 to 4, characterized in that: The power supply control module (1012) comprises a current limiting module (10121) and a voltage dividing module (10122), wherein: The first output end of the current limiting module (10121) is used to electrically connect to the first pole of the first battery pack (104); the second output end of the current limiting module (10121) is electrically connected to the first end of the voltage dividing module (10122), and the second end of the voltage dividing module (10122) is used to electrically connect to the second pole of the first battery pack (104); the first input end of the current limiting module (10121) is electrically connected to the first end of the communication network (102), and both are used to electrically connect to the first end of the external power supply and the first end of the power module (103); the second input end of the current limiting module (10121) is electrically connected to the second end of the communication network (102), and is used to electrically connect to the second end of the external power supply and the second end of the power module (103); The voltage dividing module (10122) is used to divide the voltage with the first battery pack (104) so ​​that the potential of the first electrode of the first battery pack (104) is higher than the potential of the second electrode; The current limiting module (10121) is used to control the external power supply to output a first current for the first battery pack (104) under the conduction control of the switch control module (1011), and to direct the first current from the target input end of the current limiting module (10121) to the first pole of the first battery pack (104) under the voltage dividing action of the voltage dividing module (10122), so as to realize a first charging operation of the external power supply on the first battery pack (104).

6. The battery charging control system based on external power supply according to claim 5, characterized in that: The charging control system further comprises the power module (103), and the power module (103) comprises a DC converter (1031) and a second battery pack (1032), the voltage of the second battery pack (1032) being higher than the voltage of the first battery pack (104), wherein: The first output end of the DC converter (1031) is electrically connected to the first input end of the current limiting module (10121), the second output end of the DC converter (1031) is electrically connected to the second input end of the current limiting module (10121), the first input end of the DC converter (1031) is used to electrically connect to the first pole of the second battery pack (1032), and the second input end of the DC converter (1031) is used to electrically connect to the second pole of the second battery pack (1032); The DC converter (1031) is used to adjust the second current output by the second battery pack (1032) according to a preset charging current MAP value under the conduction control of the switch control module (1011) to obtain a third current, and to flow the third current to the first pole of the first battery pack (104) through the switch control module (1011), so as to realize a second charging operation of the power supply module (103) on the first battery pack (104).

7. The battery charging control system based on an external power supply according to any one of claims 1, 2, 3, 4 and 6, characterized in that: The battery management system (101) is provided with a CAN communication line, and the battery management system (101) establishes a communication connection with the DC converter (1031) in the power module (103) and the second battery pack (1032) in the power module (103) via the CAN communication line. The battery management system (101) is also used to process the battery state of the second battery pack (1032) and the operating state of the DC converter (1031) according to the CAN communication line.

8. A method for controlling battery charging of an electronic device based on an external power supply, characterized in that: The method is applied to a battery charging control system based on an external power supply, and the charging control system includes a battery management system and a communication network, wherein: The first end of the battery management system is electrically connected to the first end of the communication network, and is used to electrically connect the first end of the external power supply and the first end of the power module. The second end of the battery management system is electrically connected to the second end of the communication network, and is used to electrically connect the second end of the external power supply and the second end of the power module. The third end of the battery management system is used to electrically connect the first pole of the first battery pack to be charged, and the fourth end of the battery management system is used to electrically connect the second pole of the first battery pack. And, the method comprises: The communication network sends the external power supply information received from the external power source to the battery management system; The battery management system controls a target object to perform a target charging operation on the first battery pack according to the external power supply information and the status message information received from the power module, and the target object includes the external power supply or the power module.

9. The electronic device battery charging control method based on external power supply according to claim 8, characterized in that: The battery management system includes a switch control module and a power supply control module, wherein: The output end of the switch control module and the first output end of the power supply control module are both used to electrically connect to the first pole of the first battery pack, the second output end of the power supply control module is used to electrically connect to the second pole of the first battery pack, the input end of the switch control module and the first input end of the power supply control module are both electrically connected to the first end of the communication network, and are both used to electrically connect to the first end of the external power supply and the first end of the power supply module, the second input end of the power supply control module is electrically connected to the second end of the communication network, and is used to electrically connect to the second end of the external power supply and the second end of the power supply module; And, the battery management system controls the target object to perform a target charging operation on the first battery pack according to the external power supply information and the status message information received from the power module, including: The switch control module controls the state of the switch control module according to the external power supply information and the state message information received from the power supply module, and the state of the switch control module includes an open state or a closed state; When the state of the switch control module is the disconnected state, the switch control module controls the power supply control module to be turned on, so as to trigger the power supply control module to control the external power supply to perform a first charging operation on the first battery pack; when the state of the switch control module is the closed state, the power supply module is controlled to be turned on, so as to trigger the power supply module to perform a second charging operation on the first battery pack, and the target charging operation includes the first charging operation and / or the second charging operation.

10. A battery system, characterized in that: The battery system comprises a battery charging control system based on an external power source as described in any one of claims 1 to 7.

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