Battery management system

Abstract

The embodiment of the invention discloses a battery management system which is used for efficiently managing a battery and improving the power supply flexibility of the battery. The system comprises a user side which is in communication connection with a battery management module and is used for sending a battery use request to the battery management module, and the battery use request carries information of a target power supply mode; the battery management module is in communication connection with at least one stored standby battery module and is used for receiving the battery use request and sending the information of the target power supply mode to the standby battery module matched with the battery use request; the standby battery module comprises a battery core and a control module connected between the battery core and the plugging end, and the control module is used for executing power supply according to the target power supply mode through the connected plugging end after receiving the information of the target power supply mode.

Description

Technical Field

[0001] The present application relates to the field of electric energy storage and application, and in particular to a battery management system. Background Art

[0002] In the field of electric energy storage, there are many types of batteries. According to the type of cell reaction, batteries can be divided into lithium batteries, sodium ion batteries, lead-acid batteries, etc. Different batteries also have preset power supply parameters such as output voltage and output current.

[0003] In actual applications, different electrical devices have different power requirements, and power supply parameters such as voltage and current limit the actual use scenarios of batteries. In order to meet the various power requirements of electrical devices, users often need to use multiple different types of batteries. However, multiple different types of batteries are difficult to manage effectively. Due to the limitations of power supply parameters, the actual utilization rate of some special types of batteries is very low, which may lead to waste of battery resources.

[0004] How to efficiently manage batteries and improve battery power supply flexibility is the technical problem to be solved by this application. Summary of the invention

[0005] The purpose of the embodiments of the present application is to provide a battery management system for efficiently managing batteries and improving the flexibility of battery power supply.

[0006] The present application provides a battery management system, including:

[0007] A user end is connected to the battery management module for sending a battery use request to the battery management module, wherein the battery use request carries information of a target power supply mode;

[0008] a battery management module, connected in communication with at least one stored standby battery module, configured to receive the battery use request and send information of the target power supply mode to the standby battery module matching the battery use request;

[0009] The standby battery module includes a battery cell and a control module connected between the battery cell and a plug-in terminal. The control module is used to supply power according to the target power supply mode through the connected plug-in terminal after receiving information about the target power supply mode.

[0010] In an embodiment of the present application, a battery use request is sent to a battery management module through a user end, which carries information about a target power supply mode. The battery management module receives the battery use request and selects a standby battery module that matches the battery use request from at least one stored standby battery module to send the information about the target power supply mode. The standby battery module includes a battery cell, a control module connected between the battery cell and the plug-in terminal, and after the standby battery module receives the information about the target power supply mode, the control module is used to perform power supply according to the target power supply mode through the connected plug-in terminal. Through the scheme provided by the embodiment of the present application, the battery management module can store at least one standby battery module, which is conducive to batch management of standby battery modules. The battery management module can select a standby battery module that meets the battery use request of the user end from the stored standby battery modules, and then send information about the target power supply mode to the selected standby battery module, so as to configure power supply through the control module of the standby battery module, so that the standby battery module can perform power supply according to the battery power supply request of the user end, and the provided electric energy meets the power supply mode requested by the user end, and meets the power demand of the user end. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0012] Figure 1 It is a structural schematic diagram of a battery management system according to an embodiment of the present application;

[0013] Figure 2 It is a schematic diagram of the logical structure of a control module in a battery management system according to an embodiment of the present application;

[0014] Figure 3 This is a schematic diagram of the logical structure of a standby battery module in a battery management system according to an embodiment of the present application;

[0015] Figure 4 It is a schematic diagram of the circuit structure of a voltage control module in a battery management system according to an embodiment of the present application. DETAILED DESCRIPTION

[0016] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than 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. The numbering of the drawings in this application is only used to distinguish the various steps in the scheme, and is not used to limit the execution order of the various steps. The specific execution order is subject to the description in the specification.

[0017] In order to solve the problems existing in the prior art, the present application embodiment provides a battery management system, such as Figure 1 As shown, including:

[0018] The user terminal 11 is connected to the battery management module 12 for sending a battery use request to the battery management module 12, wherein the battery use request carries information of a target power supply mode;

[0019] The battery management module 12 is connected in communication with at least one stored standby battery module 13, and is used to receive the battery use request and send information of the target power supply mode to the standby battery module 13 matching the battery use request;

[0020] The standby battery module 13 includes a battery cell 131 and a control module 132 connected between the battery cell 131 and a plug terminal P. The control module 132 is used to supply power according to the target power mode through the connected plug terminal P after receiving information about the target power mode.

[0021] In the present application example, the user terminal can be a portable smart device such as a mobile phone, a tablet computer, a smart watch, etc. The user can control the user terminal carried by the user to communicate with the battery management module via wireless methods such as Bluetooth and WIFI or via a wired connection line.

[0022] Alternatively, the user terminal may also be an interactive terminal including an interactive device such as a touch screen, which may be arranged near the battery management module, and the interactive terminal may be connected to the battery management module in a wired or wireless manner. The user may send a battery usage request to the battery management module through the user terminal by viewing the display content of the touch screen and performing operations by touch.

[0023] The battery usage request may be automatically generated by the user according to the user's historical usage habits, the type of power-consuming device, and other information, or may be generated after the user selects a target item through interactive methods such as typing and clicking.

[0024] The information of the target power supply mode may specifically include a variety of information, such as the power supply voltage, power supply current, power supply duration, protocol and other power supply-related information required by the electrical equipment.

[0025] In addition to the target power supply mode information, the battery use request may also include identification information related to the user terminal and user identification for distinguishing different users, as well as the time information of sending the battery use request. In practical applications, the identification information and time information can facilitate the battery management module to allocate standby battery modules to users, store the identity information of the current user of the standby battery modules, and also record the use time and return status of the standby battery modules according to the users.

[0026] In the embodiment of the present application, the battery management module can be connected to at least one standby battery module in a wired or wireless communication manner. Optionally, power can be supplied to each standby battery module in a wired manner.

[0027] Among them, the battery management module can obtain the information and charging status of the standby battery module based on the connection. In actual applications, the battery management module can store multiple standby battery modules through containers such as storage cabinets, and different standby battery modules can be stored in different compartments. The battery management module determines the storage compartment where each standby battery module is actually located based on its connection with each standby battery module. Furthermore, after sending the information of the target power supply mode to the selected standby battery module, the storage compartment where the selected standby battery module is located can be controlled to open so that the user can take out the required standby battery module from the compartment.

[0028] In the example of the present application, any standby battery module includes a battery cell, a control module and a plug-in terminal. The battery cell is used to store electricity, the control module is used to implement charge and discharge configuration and communication, and the plug-in terminal can be used to supply power to the user's device, and can also be used to plug in the battery management module to charge the battery cell. The control module and the battery cell can be connected through a pluggable port.

[0029] In this solution, various types of battery cells can be used, and the battery cell can also be a battery pack composed of multiple independent battery cells electrically connected together.

[0030] In actual application scenarios, the battery swap market has high requirements for the remaining full charge capacity of the battery. When the remaining full charge capacity of the battery is lower than a certain value, it is often eliminated from the battery swap market. The secondary utilization of batteries is limited by application scenarios, battery models are diverse, voltage platforms are inconsistent, and charging and discharging control is not intelligent, resulting in most retired battery swap lithium-ion batteries that can only be recycled for battery material processing and cannot play the value of the remaining full charge capacity. In the solution provided in the embodiment of the present application, the batteries that have been eliminated for a long time can be reused, the recycled batteries can be safety tested and screened, and multiple safe and qualified batteries can be combined into a battery core. The power supply mode of the standby battery module can be configured through the control module to meet the diverse power needs of users.

[0031] Specifically, in the application scenario of electric vehicle battery replacement, according to the voltage platform, it can be divided into three power platforms: 48V, 60V and 72V. According to the communication method between the vehicle controller and the battery, it can be divided into communication and non-communication. For the communication type, it can be divided into various types such as RS485 communication and one-line communication according to the communication method. If the battery management system is deployed separately according to the above types, it will increase the cost of battery deployment and maintenance management, and increase the risk of users not being able to match suitable batteries.

[0032] In an embodiment of the present application, a battery use request is sent to a battery management module through a user end, which carries information about a target power supply mode. The battery management module receives the battery use request and selects a standby battery module that matches the battery use request from at least one stored standby battery module to send the information about the target power supply mode. The standby battery module includes a battery cell, a control module connected between the battery cell and the plug-in terminal, and after the standby battery module receives the information about the target power supply mode, the control module is used to perform power supply according to the target power supply mode through the connected plug-in terminal. Through the scheme provided by the embodiment of the present application, the battery management module can store at least one standby battery module, which is conducive to batch management of standby battery modules. The battery management module can select a standby battery module that meets the battery use request of the user end from the stored standby battery modules, and then send information about the target power supply mode to the selected standby battery module, so as to configure power supply through the control module of the standby battery module, so that the standby battery module can perform power supply according to the battery power supply request of the user end, and the provided electric energy meets the power supply mode requested by the user end, and meets the power demand of the user end.

[0033] This solution is conducive to the recycling and reuse of battery energy. For various types of battery packs, this solution can make full use of battery resources, send and receive battery usage requests through the battery management module, and then configure the power supply mode of the standby battery module. It can be widely used in various power usage scenarios.

[0034] Based on the solution provided in the above embodiment, optionally, Figure 2 As shown, the control module 132 specifically includes:

[0035] Analog front end module 1321, micro control unit 1322 and DC to DC control chip 1323;

[0036] The analog front-end module 1321 electrically connected to the battery cell 131 is used to perform current sampling and / or voltage sampling on the battery cell 131 and send the sampling result to the micro control unit 1322, so as to control the battery cell 131 to release electric energy after the micro control unit 1322 configures the power supply parameters;

[0037] The micro control unit 1322 is communicatively connected to the analog front-end module 1321, and is used to perform power supply parameter configuration on the DC-to-DC control chip 1323 according to the received sampling results and the information of the target power supply mode, so as to control the DC-to-DC control chip 1323 to perform power conversion according to the information of the target power supply mode, and to perform power supply according to the target power supply mode through the plug terminal P.

[0038] In the embodiment of the present application, the control module includes an analog front end module (Analog Front End, AFE), a microcontroller unit (Microcontroller Unit; MCU) and a direct current-direct current (Direct Current, DC / DC) control chip.

[0039] Among them, the AFE is used to perform current sampling and / or voltage sampling on the battery cell 131. Among them, performing voltage sampling on the battery cell can be used to determine the energy storage state of the battery cell, and current sampling can be used to determine the charge and discharge state of the battery cell. The AFE can control the NMOS to be turned on or off by controlling the NMOS control terminal, control the opening and closing of the circuit from the plug terminal P to the battery cell, and then control the battery cell to turn on or off the charge and discharge. The AFE is connected to the MCU in communication, and the above sampling results can be sent to the MCU so that the MCU can perform power supply parameter configuration according to the state of the battery cell to ensure that the standby battery module can perform power supply in the power supply mode requested by the user.

[0040] The MCU is used to implement the communication and configuration processing functions. It is connected to the AFE and DC / DC control chip respectively to realize the communication and control between the modules. After receiving the sampling results and the information of the target power supply mode, the MCU can determine the state of the battery cell according to the sampling results to determine the power supply parameters such as the voltage and current of the battery cell to release the electric energy, and then perform the power supply parameter configuration on the DC / DC control chip so that the electric energy released by the battery cell passes through the DC / DC and then supplies power through the plug terminal P in the target power supply mode.

[0041] Based on the solution provided in the above embodiment, optionally, the control module 132 further includes a communication module 133, the communication module 133 is communicatively connected with the micro control unit 1322, and the communication module 132 performs communication based on at least one of the following communication protocols:

[0042] RS485 communication protocol, Standard Interchange Format SIF communication protocol, Transmission Control Protocol TCP / Internet Protocol IP communication protocol.

[0043] In the present application example, the communication module is used to implement the communication function between the MCU and the user end. In practical applications, one or more communication modules can be selected to perform communication according to actual needs, and correspondingly, the communication protocol can be flexibly selected according to actual needs.

[0044] Next, we will further explain this solution with an example. Figure 3 A schematic diagram of the logical structure of a standby battery module is shown.

[0045] The battery cell is composed of 16 lithium iron phosphate batteries connected in series. AFE has the function of current sampling and voltage sampling of the battery cell, and can realize charge / discharge control by controlling NMOS.

[0046] MCU has multiple functions such as discharge current detection, charging current detection, output voltage detection and setting circuit. It configures the power supply parameters through bidirectional DC / DC power MOS and inductor by configuring the bidirectional DC / DC control chip. MCU can also have multiple functions such as circuit safety protection function and power calculation function, which can realize flexible charging and discharging configuration according to the actual status of each functional module in the standby battery module, and effectively ensure the safety and effectiveness of charging and discharging. In addition, the DC / DC control chip can also have a maximum current limiting function, which ensures the charging and discharging safety of the standby battery module by limiting the maximum charging and discharging current.

[0047] The MCU can be connected to one or more communication modules. The figure shows a 4G module, RS485 communication and a one-line communication module. In actual applications, the communication flexibility of the standby battery module can be improved by configuring multiple communication modules.

[0048] In actual applications, the battery management module can pre-configure multiple preset power supply modes for the MCU. Then, after the battery management module receives a battery usage request from the user, it can determine the target power supply mode requested by the user based on the battery usage request, and then send the identifier of the target power supply mode to the selected standby battery module. The standby battery module queries the corresponding preset power supply mode based on the received identifier of the target power supply mode, and executes the power supply parameter configuration according to the configuration method corresponding to the target power supply mode.

[0049] For example, assume that the standby battery module is a lithium-ion battery and the battery management module is a battery swap cabinet. Then, the battery swap cabinet can preset the default power supply mode for the lithium-ion battery to be a 48V communication lithium battery. In addition, the power supply modes pre-configured for the lithium-ion battery include, for example, 48V communication lithium battery, 60V communication lithium battery, 72V communication lithium battery, 48V simulated lead-acid battery, 60V simulated lead-acid battery, 72V simulated lead-acid battery, etc. In actual applications, it can be flexibly set according to the actual needs of the user.

[0050] Assuming that the user uses a mobile phone APP to perform battery swap operations, the mobile phone APP interacts with the battery swap cabinet. The user can select the type of battery to be used through the mobile phone APP. After the battery swap cabinet receives the battery type information used by the user, it selects a battery with a suitable power from the batteries in the cabinet, configures the battery to the battery mode selected by the user through RS485 communication, and opens the storage compartment door where the battery is located to allow the user to use the battery.

[0051] After the user takes out the new battery, the battery returned to the battery swap cabinet can automatically communicate with the battery swap cabinet via RS485. The battery swap cabinet can detect the status of the returned battery and reconfigure the returned battery to 48V communication lithium battery mode for charging.

[0052] Through the solution provided by the embodiment of the present application, the battery management module can flexibly configure the standby battery module through a variety of communication methods. After the user initiates a battery use request, the battery management module can efficiently configure the standby battery module through a flexible communication method, so that the user can use the selected standby battery module as soon as possible.

[0053] Based on the solution provided in the above embodiment, optionally, the information of the target power supply mode includes information of a fixed voltage power supply mode and information of a non-fixed voltage power supply mode;

[0054] The micro control unit 1322 is specifically used for:

[0055] If the received battery use request carries information of a fixed voltage power supply mode, parsing the information of the fixed voltage power supply mode to determine a first target power supply voltage, where the first target power supply voltage is used to instruct the control module 132 to perform constant voltage power supply according to the first target power supply voltage through the connected plug terminal;

[0056] If the received battery usage request carries information about a non-fixed voltage power supply mode, the second target power supply voltage corresponding to the real-time sampling result of the voltage sampling is determined according to a preset battery state of charge curve, and the second target power supply voltage is used to instruct the control module to perform voltage transformation and power supply according to the second target power supply voltage through the connected plug terminal, wherein the preset battery state of charge curve is used to characterize the correspondence between the storage capacity of the lead-acid battery and the supply voltage.

[0057] In practical applications, the power supply mode can be divided into fixed voltage power supply and non-fixed voltage power supply according to whether the voltage is variable. Among them, the fixed voltage power supply can realize constant voltage power supply according to preset voltage values ​​such as 48V, 60V, and 72V.

[0058] For fixed voltage power supply, for example, when the user needs to use a 60V communication lithium battery, the user selects a 60V communication lithium battery on the mobile phone APP, and the battery swap cabinet selects a group of batteries that meet the capacity requirements according to the status of the batteries in the cabinet, configures the battery into a 60V communication lithium battery through RS485 communication, and opens the door for the user to use. Among them, the information of the fixed voltage power supply mode in the request sent by the user end can specifically include the first target power supply voltage to instruct the MCU to configure the standby battery module to the constant voltage power supply mode of the first target power supply voltage.

[0059] After the battery is configured as a 60V communication lithium battery, it is fixed to the corresponding voltage output through the built-in DC / DC circuit to keep the battery output stable. If the power-consuming device is an electric two-wheeled vehicle, the main control of the electric two-wheeled vehicle can obtain information such as the remaining capacity and temperature of the battery through RS485 or a reserved one-line communication function to keep the battery status display accurate during the charging process and avoid sudden power failure and parking.

[0060] In addition, in practical applications, in addition to setting the supply voltage, the supply power or the supply current may also be set, and the actual supply parameters may be selected according to actual needs.

[0061] For non-fixed voltage power supply, the non-fixed voltage power supply mode can be divided into multiple types according to the platform voltage, for example, 48V simulated lead-acid battery, 60V simulated lead-acid battery, 72V simulated lead-acid battery, etc. The purpose of non-fixed voltage power supply is to simulate the power supply mode such as lead-acid battery where the voltage changes with the battery power. Some electrical equipment using lead-acid batteries determines the remaining battery power based on the supply voltage. Therefore, non-fixed voltage power supply can be used in some application scenarios. The electrical equipment can accurately determine the remaining battery power to achieve accurate power display.

[0062] For example, when a user's electric two-wheeled or three-wheeled vehicle does not have a communication function, the instrument on the two-wheeled or three-wheeled vehicle determines the remaining capacity of the battery based on the output voltage of the battery. At this time, the user can choose to simulate the lead-acid battery mode.

[0063] After the user selects a simulated lead-acid battery of the corresponding voltage platform, the battery controls the output voltage through the built-in DC / DC circuit, and the output voltage value corresponds to the voltage of the lead-acid battery corresponding to the current remaining battery capacity of the battery. In this mode, the power displayed by the user's instrument is consistent with that when using a lead-acid battery, and the vehicle power experience is also consistent with that of using a lead-acid battery.

[0064] Among them, the battery state of charge curve (State Of Charge, SOC) of the lead-acid battery can characterize the corresponding relationship between the remaining battery power and the output voltage. In this solution, the SOC curve is measured or obtained from the battery manufacturer and pre-stored in the MCU, so that the MCU can determine the corresponding output voltage according to the real-time sampling result of the AFE, so as to control the standby battery module to output the corresponding voltage according to the SOC curve of the lead-acid battery, and the electrical equipment can accurately display the remaining battery power of the battery cell according to the power supply voltage.

[0065] Based on the solution provided in the above embodiment, optionally, the DC-DC control chip is specifically used for:

[0066] The electric energy released by the battery cell is converted into voltage and current so as to supply power through the plug terminal according to the received target supply voltage and the supply current less than or equal to the preset current value.

[0067] In the present application example, a preset current value for ensuring circuit safety is pre-set in the DC / DC control chip, which is used to control the standby battery module to supply power with a safe power supply current not greater than the preset current value.

[0068] Based on the solution provided in the above embodiment, optionally, the control module includes a voltage control module, such as Figure 4 As shown, the voltage control module includes:

[0069] A first resistor R1, a first end of the first resistor 41 is grounded GND, and a second end of the first resistor R1 is connected to a negative input terminal U- of the operational amplifier;

[0070] A second resistor R2, wherein a first end of the second resistor R2 is connected to the plug-in terminal Ui1, and a second end of the second resistor is connected to the positive input terminal U+ of the operational amplifier;

[0071] A third resistor R3, wherein a first end of the third resistor R3 is connected to a digital-to-analog conversion output terminal Ui2 of the micro control unit, and a second end of the third resistor R3 is connected to a positive input terminal U+ of the operational amplifier;

[0072] a fourth resistor R4, wherein a first end of the fourth resistor R4 is grounded GND, and a second end of the fourth resistor R4 is connected to a positive input terminal U+ of the operational amplifier;

[0073] A feedback resistor Rf is connected between the negative input terminal U- of the operational amplifier and the output terminal Uo of the operational amplifier;

[0074] The output terminal Uo of the operational amplifier is connected to the feedback terminal of the DC-to-DC control chip.

[0075] In the example of the present application, the operational amplifier may specifically use a non-inverting adder, such as LM358.

[0076] The voltage control module provided in the embodiment of the present application can realize the overall output voltage regulation of the standby battery module. The output voltage feedback terminal of the bidirectional DC / DC control chip is not directly connected to the actual output terminal, but is connected to the output voltage feedback terminal of the bidirectional DC / DC control chip after the MCU performs calculation and configuration. Figure 3 In the circuit diagram shown, Uo is connected to the output voltage feedback terminal of the bidirectional DC / DC control chip, Ui1 is connected to the output voltage for over-voltage division and voltage following processing, and Ui2 is connected to the digital-to-analog conversion (DA) output pin of the MCU.

[0077] Among them, since Uo is the output voltage feedback terminal of the bidirectional DC / DC control chip, it will maintain a stable and unchanged voltage. Therefore, the voltage control module provided by the embodiment of the present application can control the overall output voltage of the standby battery module by adjusting Ui2 through the MCU.

[0078] In the case of non-fixed voltage power supply mode, this solution can pre-calculate the Ui2 values ​​corresponding to the output voltages of 48V, 60V, and 72V lead-acid batteries through the SOC curve of the lead-acid battery, and save them in the MCU. When the user requests a non-fixed voltage power supply mode, that is, a simulated lead-acid battery mode, the MCU can obtain the Ui2 value corresponding to the state of the battery cell according to the pre-stored SOC state table, output it to the same-direction adder, and adjust the Ui2 value at any time based on the SOC curve according to the corresponding changes in the state of the battery cell, thereby simulating the voltage output of the lead-acid battery.

[0079] Based on the solution provided in the above embodiment, optionally, the micro control unit 1322 is further used for:

[0080] Monitoring charging and discharging electrical parameters, wherein the charging and discharging electrical parameters include the discharging electrical parameters of the battery cell and / or the charging electrical parameters of the plug end;

[0081] If the charging and discharging parameters trigger a preset safety policy, the charging and discharging functions are restricted according to the preset safety policy.

[0082] In the solution provided in the embodiment of the present application, the MCU has a circuit safety protection function. Among them, the MCU can monitor the power consumption parameters corresponding to the state in real time according to the various states of the standby battery module, such as charging, discharging, and not charging or discharging.

[0083] For example, when the standby battery module is in the charging state, the MCU can detect the charging current. If the charging current exceeds the preset maximum charging current, the charging and discharging functions are limited according to the countermeasures in the preset safety strategy. Specific limiting methods include stopping charging, reducing the charging current, and issuing warnings in the form of indicator lights / sounds.

[0084] In actual applications, the charging and discharging mode of the standby battery module and its corresponding preset safety policy can be flexibly set according to actual needs. Optionally, the MCU can also send real-time alarms to the user end or other devices through the communication module to immediately remind the power user and ensure the user's power safety.

[0085] Based on the solution provided in the above embodiment, optionally, the control module 132 further includes:

[0086] An electromagnetic compatibility filter connected between the DC-to-DC control chip and the plug-in terminal.

[0087] See also Figure 3The filter can be connected between the DC / DC control chip and the plug-in terminal. The filter can be an electromagnetic compatibility filter (EMC). The filter can be used to reduce ripple current and effectively improve power supply stability.

[0088] Based on the solution provided in the above embodiment, optionally, the battery management module 12 is further used to charge the at least one standby battery module 13 stored in accordance with a preset power supply mode;

[0089] The micro control unit 1322 is also used for:

[0090] When the length of time that the standby battery module is not charged or discharged is greater than a preset length of time, the standby battery module is controlled to switch to a preset charging mode, and the preset charging mode matches the preset power supply mode.

[0091] The solution provided in the embodiment of the present application is used to perform mode switching on the standby battery module when the standby battery module is not performing charging or discharging, so that the battery management module can charge the standby battery module according to a preset charging mode.

[0092] In actual applications, when the user finishes using the battery and returns it to the battery swap cabinet, the communication module of the stand-by battery module automatically connects to the battery swap cabinet. The battery swap cabinet sends a command to restore the battery to 48V communication lithium battery mode and charges the battery for the next use.

[0093] Correspondingly, in the non-charging and non-discharging state, the MCU of the standby battery module can also execute the security strategy accordingly. For example, when the battery is not configured for application mode, or after charging for 3 minutes without communication, the battery enters the 48V communication lithium battery mode. At this time, the bidirectional DC / DC module of the battery is in the pass-through state, the MCU does not detect and set the output voltage, and the output voltage of the battery is equal to the cell voltage. In this mode, the MCU can detect the charging and discharging current. When the charging current or the discharging current exceeds the set maximum value, the MCU controls the bidirectional DC / DC circuit to limit the current to the set value.

[0094] In actual applications, the charging mode of the standby battery modules in the power exchange cabinet can be flexibly set according to actual needs. For example, the same charging mode is used for all standby battery modules, such as 48V constant current and constant voltage charging. Alternatively, according to the storage capacity of multiple standby battery modules, the fast charging mode is preferentially used for several standby battery modules, while the normal charging mode is used for other standby battery modules to ensure that there are always standby battery modules with sufficient power available to users in the power exchange cabinet.

[0095] Based on the solution provided in the above embodiment, optionally, the battery management module 12 is specifically used for:

[0096] Selecting at least one to-be-selected battery module 13 having a storage capacity greater than a preset capacity from at least one stored standby battery module 13 according to the battery use request;

[0097] The target power supply mode information is sent to the candidate battery module 13 matching the battery use request.

[0098] In the solution provided by the embodiment of the present application, the battery management module can select a battery module with sufficient power to be selected and provide it to the user according to the battery use request. If the battery use request carries an estimated charging time, the preset power can be determined according to the estimated charging time, and then which standby battery modules can meet the user's charging needs from at least one stored standby battery module can be determined, and then at least one standby battery module is selected, and one of them sends the information of the target power supply mode to configure the power supply and provide it to the user. Alternatively, the preset power can be a pre-configured customization, such as 80%.

[0099] Through the solution provided in the embodiment of the present application, it is possible to provide users with standby battery modules with sufficient power to meet the user's charging needs.

[0100] The solution provided in the embodiment of the present application can adapt to lithium-ion batteries in multiple application scenarios and can be applied to a variety of usage scenarios, which is conducive to providing flexible operational space for product preparation and commissioning. Among them, through the power distribution mode, the standby battery module can power a variety of different load devices, effectively improving the scope of use of the product and improving versatility. Moreover, the input voltage and charge and discharge power of the battery are variable, and the operation is more stable and reliable.

[0101] Those skilled in the art will appreciate that the embodiments of the present application may be provided as methods, systems, or computer program products. Therefore, the present application may adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment in combination with software and hardware. Moreover, the present application may adopt the form of a computer program product implemented in one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) that include computer-usable program code.

[0102] The present application is described with reference to the flowcharts and / or block diagrams of the methods, devices (systems), and computer program products according to the embodiments of the present application. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of the processes and / or boxes in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0103] These computer program instructions may also be stored in a computer readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer readable memory produce an article of manufacture including an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0104] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0105] In a typical configuration, a computing device includes one or more processors (CPU), input / output interfaces, network interfaces, and memory.

[0106] The memory may include non-permanent storage in a computer-readable medium, random access memory (RAM) and / or non-volatile memory in the form of read-only memory (ROM) or flash RAM. The memory is an example of a computer-readable medium.

[0107] Computer readable media include permanent and non-permanent, removable and non-removable media that can be implemented by any method or technology to store information. Information can be computer readable instructions, data structures, program modules or other data. Examples of computer storage media include, but are not limited to, phase change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other memory technology, compact disk read-only memory (CD-ROM), digital versatile disk (DVD) or other optical storage, magnetic cassettes, magnetic tape magnetic disk storage or other magnetic storage devices or any other non-transmission media that can be used to store information that can be accessed by a computing device. As defined herein, computer readable media does not include temporary computer readable media (transitory media), such as modulated data signals and carrier waves.

[0108] It should also be noted that the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, commodity or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, commodity or device. In the absence of more restrictions, the elements defined by the sentence "comprises a ..." do not exclude the existence of other identical elements in the process, method, commodity or device including the elements.

[0109] Those skilled in the art will appreciate that the embodiments of the present application may be provided as methods, systems or computer program products. Therefore, the present application may adopt the form of a complete hardware embodiment, a complete software embodiment or an embodiment in combination with software and hardware. Moreover, the present application may adopt the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) that contain computer-usable program code.

[0110] The above is only an embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various changes and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.

Claims

1. A battery management system, characterized in that: include: A user end is connected to the battery management module for sending a battery use request to the battery management module, wherein the battery use request carries information of a target power supply mode; a battery management module, connected in communication with at least one stored standby battery module, configured to receive the battery use request and send information of the target power supply mode to the standby battery module matching the battery use request; The standby battery module includes a battery cell and a control module connected between the battery cell and a plug-in terminal. The control module is used to supply power according to the target power supply mode through the connected plug-in terminal after receiving information about the target power supply mode.

2. The system according to claim 1, characterized in that The control module specifically includes: Analog front-end module, microcontroller unit and DC-to-DC control chip; The analog front-end module electrically connected to the battery cell is used to perform current sampling and / or voltage sampling on the battery cell and send the sampling result to the micro control unit to control the battery cell to release electric energy after the micro control unit configures the power supply parameters; The micro control unit is communicatively connected to the analog front-end module, and is used to execute power supply parameter configuration on the DC-to-DC control chip according to the received sampling results and the information of the target power supply mode, so as to control the DC-to-DC control chip to perform power conversion according to the information of the target power supply mode, and to perform power supply according to the target power supply mode through the plug terminal.

3. The system according to claim 2, characterized in that The control module further includes a communication module, which is in communication connection with the micro control unit, and the communication module performs communication based on at least one of the following communication protocols: RS485 communication protocol, Standard Interchange Format SIF communication protocol, Transmission Control Protocol TCP / Internet Protocol IP communication protocol.

4. The system according to claim 2, characterized in that The target power supply mode information includes information of a fixed voltage power supply mode and information of a non-fixed voltage power supply mode; Wherein, the micro control unit is specifically used for: If the received battery use request carries information of a fixed voltage power supply mode, parsing the information of the fixed voltage power supply mode to determine a first target power supply voltage, where the first target power supply voltage is used to instruct the control module to perform constant voltage power supply according to the first target power supply voltage through the connected plug terminal; If the received battery usage request carries information about a non-fixed voltage power supply mode, the second target power supply voltage corresponding to the real-time sampling result of the voltage sampling is determined according to a preset battery state of charge curve, and the second target power supply voltage is used to instruct the control module to perform voltage transformation and power supply according to the second target power supply voltage through the connected plug terminal, wherein the preset battery state of charge curve is used to characterize the correspondence between the storage capacity of the lead-acid battery and the supply voltage.

5. The system according to claim 4, characterized in that The DC-to-DC control chip is specifically used for: The electric energy released by the battery cell is converted into voltage and current so as to supply power through the plug terminal according to the received target supply voltage and the supply current less than or equal to the preset current value.

6. The system according to claim 4, characterized in that The control module includes a voltage control module, and the voltage control module includes: a first resistor, wherein a first end of the first resistor is grounded, and a second end of the first resistor is connected to a negative input terminal of an operational amplifier; a second resistor, wherein a first end of the second resistor is connected to the plug-in end, and a second end of the second resistor is connected to the positive input end of the operational amplifier; a third resistor, wherein a first end of the third resistor is connected to a digital-to-analog conversion output end of the microcontroller unit, and a second end of the third resistor is connected to a positive input end of the operational amplifier; a fourth resistor, wherein a first end of the fourth resistor is grounded, and a second end of the fourth resistor is connected to the positive input terminal of the operational amplifier; A feedback resistor connected between the negative input terminal of the operational amplifier and the output terminal of the operational amplifier; The output end of the operational amplifier is connected to the feedback end of the DC-to-DC control chip.

7. The system according to claim 4, characterized in that The micro control unit is also used for: Monitoring charging and discharging electrical parameters, wherein the charging and discharging electrical parameters include the discharging electrical parameters of the battery cell and / or the charging electrical parameters of the plug end; If the charging and discharging parameters trigger a preset safety policy, the charging and discharging functions are restricted according to the preset safety policy.

8. The system according to any one of claims 2 to 7, characterized in that: The control module also includes: An electromagnetic compatibility filter connected between the DC-to-DC control chip and the plug-in terminal.

9. The system according to any one of claims 2 to 7, characterized in that: The battery management module is also used to charge the at least one standby battery module stored in accordance with a preset power supply mode; Wherein, the micro control unit is also used for: When the length of time that the standby battery module is not charged or discharged is greater than a preset length of time, the standby battery module is controlled to switch to a preset charging mode, and the preset charging mode matches the preset power supply mode.

10. The system according to any one of claims 1 to 7, characterized in that: The battery management module is specifically used for: Selecting at least one battery module for selection whose storage capacity is greater than a preset capacity from at least one stored standby battery module according to the battery use request; The target power supply mode information is sent to a candidate battery module that matches the battery use request.

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