Battery system energy management method, battery system, battery management system and electric device

Abstract

This application provides a battery system energy management method, a battery system, a battery management system, and an electrical device. The battery system includes a first battery pack and a second battery pack. The method includes: acquiring the operating state and state parameters of the battery system; if the first battery pack is in a discharging state, acquiring a first demand discharge parameter; determining a first preset state value and / or a second preset state value based on the first demand discharge parameter; if the first battery pack is in a discharging state, the state parameter of the first battery pack is less than or equal to the first preset state value, and the state parameter of the second battery pack is greater than or equal to the second preset state value, controlling the transfer of energy from the second battery pack to the first battery pack. The battery system energy management method, battery system, battery management system, and electrical device provided in this application can improve the performance of the battery system.

Description

Technical Field

[0001] This application relates to the field of battery technology, and more specifically, to a battery system energy management method, a battery system, a battery management system, and an electrical device. Background Technology

[0002] In the field of new energy, batteries are the primary power source for electrical equipment such as electric vehicles, ships, and spacecraft, and their importance is self-evident. Therefore, battery technology is a crucial factor in the development of electrical equipment.

[0003] Therefore, improving the performance of battery systems to better meet the needs of electrical equipment is one of the urgent problems to be solved. Summary of the Invention

[0004] This application provides a battery system energy management method, a battery system, a battery management system, and an electrical device, which can improve the performance of the battery system.

[0005] In a first aspect, a battery system energy management method is provided. The battery system includes a first battery pack and a second battery pack. The method includes: acquiring the operating state and state parameters of the battery system, wherein the operating state indicates that the first battery pack and / or the second battery pack are in a discharge state; acquiring a first demand discharge parameter of the first battery pack when the first battery pack is in a discharge state; determining a first preset state value and / or a second preset state value based on the first demand discharge parameter; and controlling the second battery pack to transfer energy to the first battery pack when the first battery pack is in a discharge state, the state parameter of the first battery pack is less than or equal to the first preset state value, and the state parameter of the second battery pack is greater than or equal to the second preset state value.

[0006] In this embodiment, when the first battery pack is in a discharging state, a first preset state value and / or a second preset state value can be determined based on the first required discharge parameters of the first battery pack. Then, when the first battery pack is in a discharging state, the state parameters of the first battery pack are less than or equal to the first preset state value, and the state parameters of the second battery pack are greater than or equal to the second preset state value, the second battery pack is controlled to transfer energy to the first battery pack. This allows the second battery pack to replenish the energy of the first battery pack in a timely manner, reducing the impact of the low state parameters of the first battery pack on the performance of the battery system. This ensures that the state parameters of the first battery pack meet its discharge requirements, thus satisfying the power needs of the device and improving the device's battery life and user experience.

[0007] In one possible implementation, determining a first preset state value and / or a second preset state value based on a first required discharge parameter includes: determining a first state parameter corresponding to when the allowed discharge parameter of the first battery pack meets the first required discharge parameter based on the correspondence between the state parameter and allowed discharge parameter of the first battery pack; and determining the first preset state value based on the first state parameter.

[0008] In this embodiment, the first state parameter corresponding to the first battery pack meeting the first required discharge parameter can be determined based on the correspondence between the state parameters and the allowable discharge parameters of the first battery pack. Then, a first preset state value is determined based on the corresponding first state parameter. Thus, based on the first preset state value, when the second battery pack replenishes energy to the first battery pack, the state parameters of the first battery pack can meet its discharge requirements, thereby meeting the power consumption needs of the electrical equipment and improving the user experience.

[0009] In one possible implementation, the first preset state value increases as the first required discharge parameter increases.

[0010] In this embodiment, the first preset state value can be flexibly adjusted based on the first required discharge parameter of the first battery pack. This allows for energy transfer from the second battery pack to the first battery pack when the first required discharge parameter is relatively high and the state parameter of the first battery pack is also at a relatively high level; conversely, it allows for energy transfer from the second battery pack to the first battery pack only when the first required discharge parameter is relatively low and the state parameter of the first battery pack is also at a relatively low level. Thus, based on the first preset state value, while ensuring a reliable power supply to the electrical equipment, the timing and / or frequency of energy transfer from the second battery pack to the first battery pack can be flexibly adjusted, improving the performance and lifespan of the battery system.

[0011] In one possible implementation, the second preset state value decreases as the first required discharge parameter increases.

[0012] In this embodiment, the second preset state value can be flexibly adjusted based on the first required discharge parameter of the first battery pack. This allows for energy transfer from the second battery pack to the first battery pack only when the first required discharge parameter is relatively large, and the state parameter of the second battery pack is greater than or equal to a smaller value, thus providing more energy to the first battery pack. Conversely, if the first required discharge parameter is relatively small, energy transfer from the second battery pack to the first battery pack only when the state parameter of the second battery pack is greater than or equal to a larger value, providing relatively less energy to the first battery pack. Therefore, based on the second preset state value, the timing and / or frequency of energy transfer from the second battery pack to the first battery pack can be flexibly adjusted while providing a reliable power supply to the electrical equipment, thereby improving the performance and lifespan of the battery system.

[0013] In one possible implementation, the method further includes: when the state parameter of the first battery pack is greater than a third preset state value, controlling the second battery pack to stop transferring energy to the first battery pack, wherein the third preset state value is greater than or equal to the first preset state value.

[0014] In this embodiment, when the first battery pack has its state parameters greater than or equal to a third preset state value, the second battery pack can be controlled to stop transferring energy to the first battery pack. This ensures that the energy transferred to the first battery pack meets its discharge requirements, thereby providing a reliable power supply for the electrical equipment, meeting the usage needs of the electrical equipment, and improving the user experience.

[0015] In one possible implementation, the method further includes: when the state parameter of the second battery pack is less than a fourth preset state value, controlling the second battery pack to stop transferring energy to the first battery pack, wherein the fourth preset state value is less than or equal to the second preset state value.

[0016] In this embodiment of the application, when the state parameter of the second battery pack is less than or equal to the fourth preset state value, the second battery pack is controlled to stop transferring energy to the first battery pack. This can reduce the impact of the low state parameter of the second battery pack on the second battery pack when the second battery pack is transferring energy to the first battery pack.

[0017] In one possible implementation, the method further includes: when the second battery pack is in a discharging state, acquiring a second required discharge parameter of the second battery pack; determining a fifth preset state value and / or a sixth preset state value based on the second required discharge parameter; and controlling the first battery pack to transfer energy to the second battery pack when the second battery pack is in a discharging state, the state parameter of the first battery pack is greater than or equal to the fifth preset state value, and the state parameter of the second battery pack is less than or equal to the sixth preset state value.

[0018] In this embodiment, when the second battery pack is in a discharging state, a fifth preset state value and / or a sixth preset state value are determined based on the second required discharge parameters of the second battery pack. Then, when the second battery pack is in a discharging state, the state parameters of the first battery pack are greater than or equal to the fifth preset state value, and the state parameters of the second battery pack are less than or equal to the sixth preset state value, energy transfer from the first battery pack to the second battery pack is controlled. This allows for timely replenishment of energy to the second battery pack via the first battery pack, reducing the impact of the lower state parameters of the second battery pack on the performance of the battery system. This ensures that the state parameters of the second battery pack meet the discharge requirements of the device, thereby increasing the device's battery life and improving the user experience.

[0019] In one possible implementation, the fifth preset state value decreases as the second required discharge parameter increases.

[0020] In this embodiment, the fifth preset state value can be flexibly adjusted based on the second required discharge parameter of the second battery pack. This allows for energy transfer from the first battery pack to the second battery pack only when the second required discharge parameter is relatively large, provided the first battery pack's state parameter is greater than or equal to a smaller value, thus providing more energy to the second battery pack. Conversely, it allows for energy transfer from the first battery pack to the second battery pack only when the second required discharge parameter is relatively small, provided the first battery pack's state parameter is greater than or equal to a larger value, thus providing relatively less energy to the first battery pack. Furthermore, based on the sixth preset state value, the timing and / or frequency of energy transfer from the first battery pack to the second battery pack can be flexibly adjusted while providing a reliable power supply to the electrical equipment, thereby improving the battery system's performance and lifespan.

[0021] In one possible implementation, determining a fifth preset state value and / or a sixth preset state value based on the second required discharge parameter includes: determining a second state parameter corresponding to when the allowable discharge parameter of the second battery pack meets the second required discharge parameter based on the correspondence between the state parameter and allowable discharge parameter of the second battery pack; and determining a sixth preset state value based on the second state parameter.

[0022] In this embodiment, the state parameter value corresponding to the second battery pack's allowable discharge parameter meeting the second required discharge parameter can be determined based on the correspondence between the state parameters and allowable discharge parameters of the second battery pack. Then, a sixth preset state value is determined based on the corresponding state parameter value. Thus, based on the sixth preset state value, when the first battery pack replenishes energy to the second battery pack, the state parameters of the second battery pack can meet its discharge requirements, thereby meeting the power consumption needs of the electrical equipment and improving the user experience.

[0023] In one possible implementation, the sixth preset state value increases as the second required discharge parameter increases.

[0024] In this embodiment, the sixth preset state value can be flexibly adjusted according to the second demand discharge parameter of the second battery pack. This allows for energy transfer from the first battery pack to the second battery pack when the second demand discharge parameter is relatively high and the state parameter of the second battery pack is also at a relatively high level; conversely, it allows for energy transfer from the first battery pack to the second battery pack only when the second demand discharge parameter is relatively low and the state parameter of the second battery pack is also at a relatively low level. Thus, based on the sixth preset state value, while ensuring a reliable power supply to the electrical equipment, the timing and / or frequency of energy transfer from the first battery pack to the second battery pack can be flexibly adjusted, improving the performance and lifespan of the battery system.

[0025] In one possible implementation, the method further includes: when the state parameter of the second battery pack is greater than a seventh preset state value, controlling the first battery pack to stop transferring energy to the second battery pack, wherein the seventh preset state value is greater than or equal to a sixth preset state value.

[0026] In this embodiment, when the second battery pack is energized to the point that its state parameters are greater than or equal to a seventh preset state value, the first battery pack can be controlled to stop transferring energy to the second battery pack. This ensures that the energy transferred to the second battery pack meets its discharge requirements, thereby providing a reliable power supply for the electrical equipment, meeting the usage needs of the electrical equipment, and improving the user experience.

[0027] In one possible implementation, the method further includes: controlling the first battery pack to stop transferring energy to the second battery pack when the state parameter of the first battery pack is less than an eighth preset state value, wherein the eighth preset state value is less than or equal to a fifth preset state value.

[0028] In this embodiment of the application, when the state parameter of the first battery pack is less than or equal to the eighth preset state value, the first battery pack is controlled to stop transferring energy to the second battery pack. This can reduce the impact of the first battery pack's low state parameter on the first battery pack when the first battery pack is transferring energy to the second battery pack.

[0029] In a second aspect, a battery system is provided, comprising a first battery pack and a second battery pack. The battery system further includes: an acquisition unit, configured to acquire the operating state and state parameters of the battery system, wherein the operating state indicates that the first battery pack and / or the second battery pack are in a discharging state; and, when the first battery pack is in a discharging state, to acquire a first required discharge parameter of the first battery pack; and a control unit, configured to determine a first preset state value and / or a second preset state value based on the first required discharge parameter; and, when the first battery pack is in a discharging state, the state parameter of the first battery pack is less than or equal to the first preset state value, and the state parameter of the second battery pack is greater than or equal to the second preset state value, to control the second battery pack to transfer energy to the first battery pack.

[0030] In one possible implementation, the control unit is specifically configured to determine, based on the correspondence between the state parameters and the allowable discharge parameters of the first battery pack, the first state parameter corresponding to the first required discharge parameter; and to determine the first preset state value based on the first state parameter.

[0031] In one possible implementation, the first preset state value increases as the first required discharge parameter increases.

[0032] In one possible implementation, the second preset state value decreases as the first required discharge parameter increases.

[0033] In one possible implementation, the control unit is further configured to control the second battery pack to stop transferring energy to the first battery pack when the state parameter of the first battery pack is greater than a third preset state value, wherein the third preset state value is greater than or equal to the first preset state value.

[0034] In one possible implementation, the control unit is further configured to control the second battery pack to stop transferring energy to the first battery pack when the state parameter of the second battery pack is less than a fourth preset state value, wherein the fourth preset state value is less than or equal to the second preset state value.

[0035] In one possible implementation, the acquisition unit is further configured to acquire a second required discharge parameter of the second battery pack when the second battery pack is in a discharging state; the control unit is further configured to determine a fifth preset state value and / or a sixth preset state value based on the second required discharge parameter; and control the first battery pack to transfer energy to the second battery pack when the second battery pack is in a discharging state, the state parameter of the first battery pack is greater than or equal to the fifth preset state value, and the state parameter of the second battery pack is less than or equal to the sixth preset state value.

[0036] In one possible implementation, the fifth preset state value decreases as the second required discharge parameter increases.

[0037] In one possible implementation, the control unit is specifically used to determine the second state parameter corresponding to when the allowable discharge parameter of the second battery pack meets the second required discharge parameter, based on the correspondence between the state parameter and allowable discharge parameter of the second battery pack; and to determine the sixth preset state value based on the second state parameter.

[0038] In one possible implementation, the sixth preset state value increases as the second required discharge parameter increases.

[0039] In one possible implementation, the control unit is further configured to control the first battery pack to stop transferring energy to the second battery pack when the state parameter of the second battery pack is greater than a seventh preset state value, wherein the seventh preset state value is greater than or equal to a sixth preset state value.

[0040] In one possible implementation, the control unit is further configured to control the first battery pack to stop transferring energy to the second battery pack when the state parameter of the first battery pack is less than an eighth preset state value, wherein the eighth preset state value is less than or equal to a fifth preset state value.

[0041] Thirdly, a battery management system is provided, comprising a memory and a processor, the memory for storing instructions, and the processor for reading instructions and executing methods as described in the first aspect and any possible implementation thereof.

[0042] Fourthly, an electrical device is provided, the electrical device including a first load; a second load; and a battery system in any possible implementation of the second aspect, the battery system being connected to the first load and the second load, for providing a first direct current to the first load and a second direct current to the second load, wherein the voltage of the first direct current is greater than the voltage of the second direct current.

[0043] Fifthly, a chip is provided, comprising: a processor for calling and running a computer program from memory, causing a device on which the chip is mounted to perform the methods of the first aspect and any possible implementation thereof.

[0044] In a sixth aspect, a computer program is provided that, when executed by a computer, causes the computer to implement the methods described in the first aspect and any possible implementation thereof.

[0045] In a seventh aspect, a computer-readable storage medium is provided for storing a computer program that, when executed by a computer, causes the computer to implement the methods described in the first aspect and any possible implementation thereof.

[0046] Eighthly, a computer program product is provided, including computer program instructions that, when executed by a computer, cause the computer to implement the methods of the first aspect and any possible implementation thereof. Attached Figure Description

[0047] Figure 1 This is a schematic diagram of a battery system provided in an embodiment of this application.

[0048] Figure 2 This is a flowchart illustrating the battery system energy management method provided in an embodiment of this application.

[0049] Figure 3 This is another schematic flowchart of the battery system energy management method provided in the embodiments of this application.

[0050] Figure 4 This is another schematic flowchart of the battery system energy management method provided in the embodiments of this application.

[0051] Figure 5 This is another schematic flowchart of the battery system energy management method provided in the embodiments of this application.

[0052] Figure 6 This is a schematic block diagram of the battery system provided in the embodiments of this application.

[0053] Figure 7 This is another schematic block diagram of the battery management system provided in the embodiments of this application.

[0054] Figure 8 A schematic block diagram of an electrical device provided in an embodiment of this application. Detailed Implementation

[0055] The embodiments of this application will be described in further detail below with reference to the accompanying drawings and examples. The detailed description of the following embodiments and the accompanying drawings are used to illustrate the principles of this application by way of example, but should not be used to limit the scope of this application, that is, this application is not limited to the described embodiments.

[0056] In the description of the embodiments of this application, technical terms such as "first" and "second" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, "a plurality of" means two or more, unless otherwise explicitly defined. The terms "comprising" and "having," and any variations thereof, in the specification, claims, and foregoing description of the drawings of this application, are intended to cover non-exclusive inclusion.

[0057] The term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A alone, A and B simultaneously, or B alone. Additionally, the character " / " in this text generally indicates that the preceding and following related objects have an "or" relationship.

[0058] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0059] In this application, the terms "upper," "lower," "left," "right," "inner," and "outer," indicating orientation or positional relationships, are used only for the convenience of describing this application and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. "Vertical" is not vertical in the strict sense, but within the allowable tolerance range. "Parallel" is not parallel in the strict sense, but within the allowable tolerance range.

[0060] The directional terms used in the following description refer to the directions shown in the figures and are not intended to limit the specific structure of this application. It should also be noted in the description of this application that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0061] In the field of new energy, batteries are the primary power source for electrical equipment such as electric vehicles, ships, or spacecraft, and their importance is self-evident. To further improve battery performance, multiple independently operating energy zones can be set up. For example, two independent energy zones can be set up, thereby enabling multiple redundancy designs and energy management, such as flexible high-voltage power supply, flexible low-voltage power supply, thermal management redundancy, and thermal runaway isolation.

[0062] Setting up independent energy zones ensures stable power output, reduces the likelihood of equipment being affected by power failure, and allows another zone to maintain power supply even in the event of a single zone failure, ensuring continued normal operation of the equipment. Furthermore, independent energy zones allow for more flexible battery system design, catering to diverse usage scenarios. For example, independent energy zones can be paired with battery cells exhibiting different temperature performance characteristics and each zone can have its own independent temperature control. This allows the battery system to adapt to both extremely cold and high-temperature environments, enabling it to perform at its best under a wider range of conditions.

[0063] Reasonable control of the discharge of battery systems with multiple energy zones (multiple battery packs) can better meet the usage needs of electrical equipment and improve the user experience.

[0064] In view of this, embodiments of this application provide a battery system energy management method, a battery system, a battery management system, and an electrical device. The battery system includes a first battery pack and a second battery pack. The method includes: acquiring the operating state and state parameters of the battery system, wherein the operating state is used to indicate that the first battery pack and / or the second battery pack are in a discharge state; when the first battery pack is in a discharge state, acquiring a first demand discharge parameter of the first battery pack; determining a first preset state value and / or a second preset state value based on the first demand discharge parameter; and controlling the second battery pack to transfer energy to the first battery pack when the first battery pack is in a discharge state, the state parameter of the first battery pack is less than or equal to the first preset state value, and the state parameter of the second battery pack is greater than or equal to the second preset state value.

[0065] The battery system energy management method, battery system, battery management system, and electrical equipment provided in this application can improve the performance of the battery system to better meet the usage needs of the electrical equipment and enhance the user experience.

[0066] The following combination Figure 1 The battery system described above, which has multiple independent energy zones, is given an example.

[0067] like Figure 1 As shown, a battery system may include multiple independent energy zones, each equipped with a battery pack. For example, a battery system may include two independent energy zones, such as energy zone A and energy zone B, with a first battery pack and a second battery pack respectively in each zone.

[0068] Energy zones are the parts of a battery system that can operate and be controlled independently. For example, each energy zone can be charged and discharged separately. Specifically, energy zones can be divided according to the battery settings in the battery system.

[0069] As an example, each energy zone's battery pack can individually power the load of the electrical equipment.

[0070] For example, the first and second battery packs can supply power to the load of the electrical equipment independently.

[0071] The first and second battery packs can simultaneously supply power to the load of the electrical equipment. Alternatively, one of the first and second battery packs can be used first to supply power to the load of the electrical equipment, and if the power of one battery pack is depleted or fails, the other battery pack can be switched to supply power to the load of the electrical equipment.

[0072] As another example, one of the first battery pack and the second battery pack can be used to supply power to the load of an electrical device. In this case, the other of the first battery pack and the second battery pack can be used to transfer energy to that first battery pack in order to supply power to it.

[0073] As an example, the first and second battery packs can be charged via a charging device.

[0074] As an example, a charging device may include a charging station and / or a charging gun.

[0075] As an example, the first and second battery packs can be charged separately or as a whole.

[0076] For example, the charging device can charge the first battery pack and the second battery pack as a whole, such as when the first battery pack and the second battery pack are connected in parallel or in series, and then charged by the charging device.

[0077] For example, the charging device can charge the first battery pack and the second battery pack separately. The charging device may include a first charging device and a second charging device, with the first charging device charging the first battery pack and the second charging device charging the second battery pack. The first and second charging devices can also be designed as an integrated unit or as independent units.

[0078] As an example, energy can be transferred between the first battery pack and the second battery pack.

[0079] For example, the first and second battery packs can be connected via a bidirectional power module. A bidirectional power module is a device or circuit that enables bidirectional energy transfer, such as a direct current / direct current (DC / DC) converter circuit, a flyback transformer, etc.

[0080] As an example, a battery system may also include a battery management system.

[0081] For example, a battery system may include a battery management system that can control the charging and discharging of a first battery pack and a second battery pack, as well as the energy transfer between the first battery pack and the second battery pack.

[0082] For example, a battery system may include two battery management systems, one for controlling the charging and discharging of a first battery pack and the other for controlling the second battery pack. The two battery management systems can communicate with each other, and one of them can control the energy transfer between the first and second battery packs.

[0083] Specifically, the first battery pack and the second battery pack can be battery packs, battery modules, or battery collections formed by electrical connections of individual battery cells.

[0084] Optionally, when the battery system includes one or more battery packs, energy zones can be divided within each battery pack. The first battery group and the second battery group can be located in different energy zones within each battery pack, and partition beams can be provided between the energy zones to isolate them. Alternatively, when the battery system includes multiple battery packs, each battery pack can be considered as an energy zone, and multiple energy zones can be formed among the multiple battery packs.

[0085] In the embodiments of this application, the first battery pack and the second battery pack may be of the same type or different types. For example, the first battery pack may be a power battery and the second battery pack may be an energy battery; or the first battery pack may be an energy battery and the second battery pack may be a power battery; or both the first battery pack and the second battery pack may be power batteries or energy batteries.

[0086] It should be understood that Figure 1 The components shown are merely examples. In practical applications, these components may have different names, or they may be added or deleted as needed. See below for details. Figures 2 to 5 The energy management method for battery systems provided in the embodiments of this application will be described by way of example.

[0087] Figure 2 This is a flowchart illustrating the battery system energy management method provided in an embodiment of this application.

[0088] The battery system includes a first battery pack and a second battery pack.

[0089] 210. Obtain the operating status and status parameters of the battery system.

[0090] The operating status of the battery system is used to indicate whether the first battery pack and / or the second battery pack is in a discharging state.

[0091] As an example, the state parameters of the battery system include state parameters of a first battery pack and state parameters of a second battery pack. The state parameters of the first battery pack include voltage parameters and / or state of charge (SOC) parameters, and the state parameters of the second battery pack include voltage parameters and / or SOC parameters.

[0092] The operating state of the battery system can include different situations, such as the first battery pack and the second battery pack being in a discharging state, or only the first battery pack being in a discharging state (e.g., the second battery pack being in a quiescent state, neither charging nor discharging), or only the second battery pack being in a discharging state.

[0093] As an example, the state parameters of the first battery pack include the minimum state parameters of multiple battery cells in the first battery pack, or the average state parameters of multiple battery cells in the first battery pack.

[0094] As an example, the state parameters of the second battery pack include the minimum state parameters of multiple battery cells in the second battery pack, or the average state parameters of multiple battery cells in the second battery pack.

[0095] 220. When the first battery pack is in a discharging state, obtain the first required discharge parameters of the first battery pack.

[0096] In this embodiment, the first demand discharge parameter may include the current or future demand discharge parameters of the first battery pack.

[0097] In this embodiment, the required discharge parameters may refer to the discharge parameters required by the first battery pack to meet the usage requirements of the electrical equipment.

[0098] As an example, the first required discharge parameter may include at least one of discharge current, discharge voltage, or discharge power.

[0099] 230. Based on the first required discharge parameters, determine the first preset state value and / or the second preset state value.

[0100] As an example, in this embodiment, a first preset state value can be determined based on the first required discharge parameters.

[0101] As an example, in this embodiment, a second preset state value can be determined based on the first required discharge parameter.

[0102] 240. When the first battery pack is in a discharging state, the state parameter of the first battery pack is less than or equal to the first preset state value, and the state parameter of the second battery pack is greater than or equal to the second preset state value, the second battery pack is controlled to transfer energy to the first battery pack.

[0103] In this embodiment, when the first battery pack is discharging, if the state parameters of the first battery pack are too low to meet or will soon be unable to meet the discharge requirements (such as the power requirements of the electrical equipment on the first battery pack) and the second battery pack has the ability to transfer energy to the first battery pack, then the second battery pack can be controlled to transfer energy to the first battery pack.

[0104] As an example, the first battery pack is in a discharged state, while the second battery pack can be in a stationary state or a discharged state.

[0105] In this embodiment, when the first battery pack is in a discharging state, a first preset state value and / or a second preset state value can be determined based on the first required discharge parameters of the first battery pack. Then, when the first battery pack is in a discharging state, the state parameters of the first battery pack are less than or equal to the first preset state value, and the state parameters of the second battery pack are greater than or equal to the second preset state value, energy transfer from the second battery pack to the first battery pack can be controlled. This allows the second battery pack to replenish the energy of the first battery pack in a timely manner, reducing the impact of the low state parameters of the first battery pack on the performance of the battery system. This ensures that the state parameters of the first battery pack meet the discharge requirements, thereby meeting the power needs of the electrical equipment, increasing the battery life of the equipment, and improving the user experience.

[0106] In some embodiments, the first preset state value is greater than or equal to the lower limit allowed by the state parameters of the first battery pack.

[0107] If the state parameters of the first battery pack fall below their permissible lower limit, it will lead to over-discharge of the first battery pack. Therefore, replenishing the energy of the first battery pack before it is depleted to or just depleted to its permissible lower limit can reduce the risk of over-discharge.

[0108] In some embodiments, the first preset state value can be a fixed value or a variable value.

[0109] In some embodiments, the first state parameter corresponding to the first required discharge parameter can be determined based on the correspondence between the state parameters and the allowable discharge parameters of the first battery pack; and the first preset state value can be determined based on the first state parameter.

[0110] As an example, the first state parameter corresponding to the first required discharge parameter can be determined based on the correspondence diagram (or table, or other form of correspondence) between the state parameters and the allowable discharge parameters of the first battery pack. Then, the first preset state value can be determined based on the first state parameter. The following example, with the state parameter being SOC and the allowable discharge parameter being the allowable discharge power, illustrates the determination of the first preset state value.

[0111] For example, based on the relationship between SOC and allowable discharge power, the allowable discharge power of the first battery pack can be obtained, which satisfies the minimum SOC value corresponding to the first required discharge power, such as the required discharge power of the electrical equipment in the first operating mode, for example, SOC is 30%. Then, the first preset state value is determined based on this minimum SOC value. For example, the first preset state value can be set to 45% (i.e., 30% + preset value 15%).

[0112] For example, based on the relationship between SOC and allowable discharge power, the allowable discharge power of the first battery pack can be obtained, which satisfies the first required discharge power, such as the minimum SOC value corresponding to the required discharge parameters of the electrical equipment in the second operating mode, such as 40%. Then, the first preset state value can be determined based on this minimum SOC value. For example, the first preset state value can be set to 40% (50% + preset value 10%).

[0113] In this embodiment, a first preset state value is determined based on the first state parameter corresponding to the first required discharge parameter when the allowable discharge parameter of the first battery pack meets the first required discharge parameter. This allows the first battery pack to be replenished with energy in a timely manner based on the first preset state value, enabling the state parameter of the first battery pack to meet its discharge requirements, thereby satisfying the usage requirements of the electrical equipment and improving the user experience.

[0114] In some embodiments, the first preset state value increases as the first required discharge parameter increases.

[0115] In this embodiment, the first preset state value may increase continuously as the first required discharge parameter increases; or, the first preset state value may increase stepwise as the first required discharge parameter increases.

[0116] In other words, when the first demand discharge parameter is relatively large, the first preset state parameter value is also relatively large. Therefore, when the state parameter of the first battery pack is less than or equal to a large value, it is necessary to control the second battery pack to transfer energy to the first battery pack. Alternatively, when the first demand discharge parameter is relatively small, the first preset state value is also relatively small. Therefore, when the state parameter value of the first battery pack is less than or equal to a small value, it is necessary to control the second battery pack to transfer energy to the first battery pack.

[0117] As an example, when the first demand discharge parameter is A, the first preset state value is a; when the first demand discharge parameter is B, the first preset state value is b; and when the first demand discharge parameter is C, the first preset state value is c. Wherein, A > B > C and a > b > c.

[0118] In this embodiment, the first preset state value can be flexibly adjusted based on the first required discharge parameter of the first battery pack. This allows for energy transfer from the second battery pack to the first battery pack when the first required discharge parameter is relatively high and the state parameter of the first battery pack is also at a relatively high level; conversely, it allows for energy transfer from the second battery pack to the first battery pack only when the first required discharge parameter is relatively low and the state parameter of the first battery pack is also at a relatively low level. Thus, based on the first preset state value, while ensuring a reliable power supply to the electrical equipment, the timing and / or frequency of energy transfer from the second battery pack to the first battery pack can be flexibly adjusted, improving the performance and lifespan of the battery system.

[0119] In some embodiments, the second preset state value is greater than or equal to the lower limit allowed by the state parameters of the second battery pack.

[0120] If the state parameters of the second battery pack are lower than their allowable lower limit, it will cause the second battery pack to be over-discharged, affecting its performance.

[0121] In this embodiment of the application, by setting the second preset state value to the lower limit allowed by the state parameters of the second battery pack, the energy transfer from the second battery pack to the first battery pack can be controlled only when the state parameters of the second battery pack are greater than or equal to the lower limit allowed by the first battery pack. This can reduce the impact of over-discharge of the second battery pack on the performance and service life of the second battery pack.

[0122] In some embodiments, the second preset state value can be a fixed value or a variable value.

[0123] In some embodiments, the second preset state value decreases as the first required discharge parameter increases.

[0124] In this embodiment, the second preset state value may decrease continuously as the first required discharge parameter increases, or the first preset state value may decrease stepwise as the first required discharge parameter increases.

[0125] In other words, when the first demand discharge parameter is relatively large and the second preset state parameter value is relatively small, then the second battery pack can transfer energy to the first battery pack when the state parameter of the second battery pack is greater than or equal to a small value; or, when the first demand discharge parameter is relatively small and the second preset state value is relatively large, then the second battery pack will transfer energy to the first battery pack only when the state parameter of the second battery pack is greater than or equal to a large setting.

[0126] As an example, when the first demand discharge parameter is A, the second preset state value is a; when the first demand discharge parameter is B, the second preset state value is b; when the first demand discharge parameter is C, the second preset state value is c. Where A > B > C and a < b < c.

[0127] In this embodiment, the second preset state value can be flexibly adjusted based on the first demand discharge parameter. This allows the second battery pack to transfer energy to the first battery pack when the first demand discharge parameter is relatively large, provided the second battery pack's state parameter is greater than or equal to a smaller value, thus providing more energy to the first battery pack. Conversely, when the first demand discharge parameter is relatively small, the second battery pack's state parameter must be greater than or equal to a larger value to transfer energy to the first battery pack, providing relatively less energy. Therefore, based on the second preset state value, the timing and / or frequency of energy transfer from the second battery pack to the first battery pack can be flexibly adjusted while ensuring a reliable power supply to the electrical equipment, thereby improving the battery system's performance and lifespan.

[0128] Figure 3 This is another schematic flowchart of the battery system energy management method provided in the embodiments of this application.

[0129] The battery system includes a first battery pack and a second battery pack.

[0130] 310. Obtain the operating status and status parameters of the battery system.

[0131] The operating status of the battery system is used to indicate whether the first battery pack and / or the second battery pack is in a discharging state.

[0132] 320. When the first battery pack is in a discharging state, obtain the first required discharge parameters of the first battery pack.

[0133] 330. Based on the first required discharge parameters, determine the first preset state value and / or the second preset state value.

[0134] 340. When the first battery pack is in a discharging state, the state parameter of the first battery pack is less than or equal to the first preset state value, and the state parameter of the second battery pack is greater than or equal to the second preset state value, control the second battery pack to transfer energy to the first battery pack.

[0135] The content of steps 310 to 340 can be found in the relevant descriptions of steps 210 to 240, and will not be repeated here.

[0136] 350a, when the state parameters of the first battery pack are greater than the third preset state value, control the second battery pack to stop transferring energy to the first battery pack.

[0137] Among them, the third preset state value is greater than or equal to the first preset state value.

[0138] As an example, the third preset state value can be equal to the first preset state value plus a numerical value.

[0139] In this embodiment, when the first battery pack has been transferred to a state parameter that is greater than or equal to a third preset state value, the second battery pack can be controlled to stop transferring energy to the first battery pack. This ensures that the energy transferred to the first battery pack meets the discharge requirements, thereby providing a reliable power supply for the electrical equipment.

[0140] 350b, when the state parameters of the second battery pack are less than the fourth set state value, controls the second battery pack to stop transferring energy to the first battery pack.

[0141] The fourth preset state value is less than or equal to the second preset state value.

[0142] In some embodiments, the fourth preset state value is greater than the lower limit allowed by the state parameters of the second battery pack.

[0143] As an example, the fourth preset state value can be equal to the second preset state value plus a numerical value.

[0144] In this embodiment of the application, when the state parameter of the second battery pack is less than the fourth preset state value, the second battery pack is controlled to stop transferring energy to the first battery pack. This can reduce the impact of the second battery pack having too small a state parameter during the energy transfer process from the second battery pack to the first battery pack.

[0145] In some embodiments, the third preset state value can be a fixed value or a variable value.

[0146] In some embodiments, during the process of controlling the second battery pack to provide energy to the first battery pack, a third required discharge parameter of the first battery pack can be obtained; based on the correspondence between the state parameters and the allowable discharge parameters of the first battery pack, a third state parameter corresponding to the allowable discharge parameters of the first battery pack when they meet the third required discharge parameter can be determined; and a third preset state value can be determined based on the third state parameter.

[0147] In some embodiments, during the process of controlling the second battery pack to provide energy to the first battery pack, a third demand discharge parameter of the first battery pack can be obtained; a third preset state value is determined based on the third demand discharge parameter, and the third preset state value increases as the third demand discharge parameter increases.

[0148] The method for determining the third preset state value is similar to the method for determining the first preset state value, and for the sake of simplicity, this application will not elaborate on it here.

[0149] In some embodiments, the fourth preset state value can be a fixed value or a variable value.

[0150] In some embodiments, during the process of controlling the second battery pack to transfer energy to the first battery pack, a third demand discharge parameter of the first battery pack can be obtained; a fourth preset state value is determined based on the third demand discharge parameter, and the fourth preset state value decreases as the third demand discharge parameter increases.

[0151] The method for determining the fourth preset state value is similar to the method for determining the second preset state value, and for the sake of simplicity, this application will not elaborate on it here.

[0152] Figure 4 This is another schematic flowchart of the battery system energy management method provided in the embodiments of this application.

[0153] The battery system includes a first battery pack and a second battery pack.

[0154] 410, Obtain the operating status and status parameters of the battery system.

[0155] The operating status of the battery system is used to indicate whether the first battery pack and / or the second battery pack is in a discharging state.

[0156] 420A, when the first battery pack is in a discharging state, obtain the first required discharge parameters of the first battery pack.

[0157] 430A, based on the first required discharge parameters, determine the first preset state value and / or the second preset state value.

[0158] 440A controls the second battery pack to transfer energy to the first battery pack when the first battery pack is in a discharging state, the state parameter of the first battery pack is less than or equal to the first preset state value, and the state parameter of the second battery pack is greater than or equal to the second preset state value.

[0159] The content of steps 410 to 440 can be referred to the relevant description of steps 210 to 240, and will not be repeated here in the embodiments of this application.

[0160] 420B: When the second battery pack is in a discharging state, the second required discharge parameters of the second battery pack are obtained.

[0161] In this embodiment, the second demand discharge parameter may include the current or future demand discharge parameters of the second battery pack.

[0162] In this embodiment, the required discharge parameters may refer to the discharge parameters required by the second battery pack to meet the usage requirements of the electrical equipment.

[0163] As an example, the second required discharge parameter may include at least one of discharge current, discharge voltage, or discharge power.

[0164] 430B, based on the second required discharge parameters, determine the fifth preset state value and / or the sixth preset state value.

[0165] As an example, in this embodiment, a fifth preset state value can be determined based on the second required discharge parameter.

[0166] As an example, in this embodiment, a sixth preset state value can be determined based on the second required discharge parameter.

[0167] 440B, when the second battery pack is in a discharging state, the state parameter of the first battery pack is greater than or equal to the fifth preset state value, and the state parameter of the second battery pack is less than or equal to the sixth preset state value, controls the first battery pack to transfer energy to the second battery pack.

[0168] In this embodiment, when the second battery pack is discharging, if the state parameters of the second battery pack are too low to meet or are about to meet the discharge requirements (such as the power requirements of the electrical equipment to the first battery pack) and the first battery pack has the ability to transfer energy to the second battery pack, then the first battery pack can be controlled to transfer energy to the second battery pack.

[0169] As an example, the second battery pack is in a discharged state, while the first battery pack can be in a stationary state or a discharged state.

[0170] In this embodiment, when the second battery pack is in a discharging state, a fifth preset state value and / or a sixth preset state value are determined based on the second required discharge parameters of the second battery pack. Then, when the second battery pack is in a discharging state, the state parameters of the first battery pack are greater than or equal to the fifth preset state value, and the state parameters of the second battery pack are less than or equal to the sixth preset state value, energy transfer from the first battery pack to the second battery pack can be controlled. This allows for timely replenishment of energy to the second battery pack via the first battery pack, reducing the impact of the low state parameters of the first battery pack on the performance of the battery system. Consequently, the state parameters of the second battery pack can meet the discharge requirements, thus satisfying the power needs of the electrical equipment, increasing the equipment's battery life, and improving the user experience.

[0171] In some embodiments, the fifth preset state value is greater than or equal to the lower limit allowed by the state parameters of the first battery pack.

[0172] If the state parameters of the first battery pack are lower than their allowable lower limit, it will cause the first battery pack to be over-discharged, affecting the performance of the first battery pack.

[0173] In this embodiment of the application, by setting the fifth preset state value to the lower limit allowed by the state parameters of the first battery pack, the energy transfer from the first battery pack to the second battery pack can be controlled only when the state parameters of the first battery pack are greater than or equal to the lower limit allowed by the first battery pack. This can reduce the impact of over-discharge of the first battery pack on the performance and service life of the first battery pack.

[0174] In some embodiments, the fifth preset state value can be a fixed value or a variable value.

[0175] In some embodiments, the fifth preset state value decreases as the second required discharge parameter increases.

[0176] In this embodiment, the fifth preset state value may decrease continuously as the second required discharge parameter increases; or, the fifth preset state value may decrease stepwise as the second required discharge parameter increases.

[0177] In other words, when the second demand discharge parameter is relatively large and the fifth preset state parameter value is relatively small, then when the state parameter of the first battery pack is greater than or equal to a small value, the first battery pack can be controlled to transfer energy to the second battery pack to transfer more energy to the second battery pack; or, when the second demand discharge parameter is relatively small and the fifth preset state value is relatively large, then when the state parameter of the first battery pack is greater than or equal to a large setting, the first battery pack will be controlled to transfer energy to the second battery pack to transfer relatively less energy to the second battery pack.

[0178] As an example, when the second required discharge parameter is A, the fifth preset state value is a; when the second required discharge parameter is B, the fifth preset state value is b; and when the second required discharge parameter is C, the fifth preset state value is c. Where A > B > C and a < b < c.

[0179] In this embodiment, the fifth preset state value can be flexibly adjusted according to the second demand discharge parameter. This allows for energy transfer from the first battery pack to the second battery pack when the second demand discharge parameter is relatively large, provided the first battery pack's state parameter is greater than or equal to a smaller value, thus providing more energy to the second battery pack. Conversely, when the second demand discharge parameter is relatively small, energy transfer from the first battery pack to the second battery pack will only occur when the first battery pack's state parameter is greater than or equal to a larger value, providing relatively less energy to the second battery pack. Therefore, based on the fifth preset state value, the timing and / or frequency of energy transfer from the first battery pack to the second battery pack can be flexibly adjusted while ensuring a reliable power supply to the electrical equipment, thereby improving the battery system's performance and lifespan.

[0180] In some embodiments, the sixth preset state value is greater than or equal to the lower limit allowed by the state parameters of the second battery pack.

[0181] If the state parameters of the second battery pack fall below their permissible lower limit, it will lead to over-discharge of the second battery pack. Therefore, replenishing the energy of the second battery pack before it is depleted to or just depleted to its permissible lower limit can reduce the risk of over-discharge.

[0182] In some embodiments, the sixth preset state value can be a fixed value or a variable value.

[0183] In some embodiments, the second state parameter corresponding to the second battery pack meeting the second required discharge parameter can be determined based on the correspondence between the state parameter and the allowable discharge parameter of the second battery pack; and the sixth preset state value can be determined based on the second state parameter.

[0184] As an example, the second state parameter corresponding to the first required discharge parameter can be determined based on the correspondence diagram (or table, or other form of correspondence) between the state parameters and allowable discharge parameters of the second battery pack. Then, the sixth preset state value can be determined based on the second state parameter. The following example, with SOC as the state parameter and discharge power as the discharge parameter, provides an exemplary description of how to determine the sixth preset state value.

[0185] For example, based on the relationship between SOC and allowable discharge power, the allowable discharge power of the second battery pack can be obtained, which satisfies the minimum SOC value corresponding to the required discharge power of the second demand discharge power, such as the required discharge power of the electrical equipment in the first operating mode, for example, SOC is 30%. Then, the sixth preset state value is determined based on this minimum SOC value. For example, the sixth preset state value can be set to 45% (i.e., 30% + preset value 15%).

[0186] For example, based on the relationship between SOC and allowable discharge power, the allowable discharge power of the second battery pack can be obtained, which satisfies the second required discharge power, such as the minimum SOC value corresponding to the required discharge power of the electrical equipment in the second operating mode, such as 40%. Then, the sixth preset state value can be determined based on this minimum SOC value. For example, the sixth preset state value can be set to 40% (50% + preset value 10%).

[0187] In this embodiment of the application, a sixth preset state value is determined based on the second state parameter corresponding to the allowable discharge parameter of the second battery pack when the second required discharge parameter is met. Thus, based on the sixth preset state value, when the first battery pack is used to replenish energy to the second battery pack, the state parameter of the second battery pack can meet its discharge requirements, thereby meeting the power consumption requirements of the electrical equipment and improving the user experience.

[0188] In some embodiments, the sixth preset state value increases as the second required discharge parameter increases.

[0189] In this embodiment, the sixth preset state value may increase continuously as the second required discharge parameter increases; or, the sixth preset state value may increase stepwise as the second required discharge parameter increases.

[0190] In other words, when the second demand discharge parameter is relatively large, the sixth preset state parameter value is also relatively large. Therefore, when the state parameter of the second battery pack is less than or equal to a large value, it is necessary to control the first battery pack to transfer energy to the second battery pack. Alternatively, when the second demand discharge parameter is relatively small, the sixth preset state value is also relatively small. Therefore, when the state parameter value of the second battery pack is less than or equal to a small value, it is necessary to control the first battery pack to transfer energy to the second battery pack.

[0191] As an example, when the second required discharge parameter is A, the sixth preset state value is a; when the second required discharge parameter is B, the sixth preset state value is b; and when the second required discharge parameter is C, the sixth preset state value is c. Where A > B > C and a > b > c.

[0192] In this embodiment, the sixth preset state value can be flexibly adjusted according to the second demand discharge parameter of the second battery pack. This allows for energy transfer from the first battery pack to the second battery pack when the second demand discharge parameter is relatively high and the state parameter of the second battery pack is also at a relatively high level; conversely, it allows for energy transfer from the first battery pack to the second battery pack only when the second demand discharge parameter is relatively low and the state parameter of the second battery pack is also at a relatively low level. Thus, based on the sixth preset state value, while ensuring a reliable power supply to the electrical equipment, the timing and / or frequency of energy transfer from the first battery pack to the second battery pack can be flexibly adjusted, improving the performance and lifespan of the battery system.

[0193] Figure 5 This is another schematic flowchart of the battery system energy management method provided in the embodiments of this application.

[0194] The battery system includes a first battery pack and a second battery pack.

[0195] 510, Obtain the operating status and status parameters of the battery system.

[0196] The operating status of the battery system is used to indicate whether the first battery pack and / or the second battery pack is in a discharging state.

[0197] 520A, when the first battery pack is in a discharging state, obtains the first required discharge parameters of the first battery pack.

[0198] 530A, based on the first required discharge parameters, determine the first preset state value and / or the second preset state value.

[0199] 540A controls the second battery pack to transfer energy to the first battery pack when the first battery pack is in a discharging state, the state parameters of the first battery pack are less than or equal to the first preset state value, and the state parameters of the second battery pack are greater than or equal to the second preset state value.

[0200] 550A-1, when the state parameters of the first battery pack are greater than the third preset state value, controls the second battery pack to stop transferring energy to the first battery pack.

[0201] 550A-2, when the state parameters of the second battery pack are less than the fourth set state value, controls the second battery pack to stop transferring energy to the first battery pack.

[0202] The contents of steps 510, 520A to 550A can be referred to the relevant descriptions of steps 210 to 240 and steps 310 to 350, and will not be repeated here in the embodiments of this application.

[0203] 520B, when the second battery pack is in a discharging state, obtains the second required discharge parameters of the second battery pack.

[0204] 530B, based on the second required discharge parameters, determine the fifth preset state value and / or the sixth preset state value.

[0205] 540B controls the first battery pack to transfer energy to the second battery pack when the second battery pack is in a discharging state, the state parameter of the first battery pack is greater than or equal to the fifth preset state value, and the state parameter of the second battery pack is less than or equal to the sixth preset state value.

[0206] The content of steps 520B to 550B can be referred to the relevant description of steps 420B to 440B, and will not be repeated here in the embodiments of this application.

[0207] 550B-1, when the state parameters of the second battery pack are greater than the seventh preset state value, controls the second battery pack to stop transferring energy to the first battery pack.

[0208] Among them, the seventh preset state value is greater than or equal to the sixth preset state value.

[0209] As an example, the seventh preset state value can be equal to the sixth preset state value plus a numerical value.

[0210] In this embodiment, when the first battery pack has been transferred to a state parameter that is greater than or equal to a seventh preset state value, the first battery pack can be controlled to stop transferring energy to the second battery pack. This allows the energy transferred to the second battery pack to meet the discharge requirements, thereby providing a reliable power supply for the electrical equipment.

[0211] 550B-2, when the state parameters of the first battery pack are less than the eighth preset state value, controls the first battery pack to stop transferring energy to the second battery pack.

[0212] The eighth preset state value is less than or equal to the fifth preset state value.

[0213] As an example, the eighth preset state value can be equal to the fifth preset state value plus a numerical value.

[0214] In this embodiment of the application, when the state parameter of the first battery pack is less than the eighth preset state value, the first battery pack is controlled to stop transferring energy to the second battery pack. This can reduce the impact of the state parameter of the first battery pack being too small on the first battery pack during the energy transfer process from the first battery pack to the second battery pack.

[0215] In some embodiments, the seventh preset state value can be a fixed value or a variable value.

[0216] In some embodiments, during the process of controlling the first battery pack to supply energy to the second battery pack, a fourth required discharge parameter of the second battery pack can be obtained; based on the correspondence between the state parameters and the allowable discharge parameters of the second battery pack, a fourth state parameter corresponding to the allowable discharge parameters of the second battery pack when they meet the fourth required discharge parameter can be determined; and a seventh preset state value can be determined based on the fourth state parameter.

[0217] In some embodiments, during the process of controlling the first battery pack to supply energy to the second battery pack, a fourth demand discharge parameter of the second battery pack can be obtained; a seventh preset state value is determined based on the fourth demand discharge parameter, and the seventh preset state value increases as the fourth demand discharge parameter increases.

[0218] The method for determining the seventh preset state value is similar to the method for determining the sixth preset state value, and for the sake of simplicity, this application will not elaborate on it here.

[0219] In some embodiments, the eighth preset state value can be a fixed value or a variable value.

[0220] In some embodiments, during the process of controlling the first battery pack to supply energy to the second battery pack, a fourth demand discharge parameter of the second battery pack can be obtained; an eighth preset state value is determined based on the fourth demand discharge parameter, and the eighth preset state value decreases as the fourth demand discharge parameter increases.

[0221] The method for determining the eighth preset state value is similar to the method for determining the fifth preset state value, and for the sake of simplicity, this application will not elaborate on it here.

[0222] It should be understood that in the various embodiments of this application, the order of the above-mentioned processes does not imply the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of this application.

[0223] The battery system energy management method of the present application embodiments has been described in detail above. The following will combine... Figure 6 The battery system of the embodiments of this application is described in detail. The technical features described in the method embodiments are applicable to the following battery system embodiments.

[0224] Figure 6 This is a schematic block diagram of the battery system provided in an embodiment of this application. Figure 6 The battery system 4000 includes some or all of the following components.

[0225] The battery system 4000 includes a first battery pack and a second battery pack.

[0226] The battery system 4000 also includes an acquisition unit 4010 and a control unit 4020.

[0227] The acquisition unit 4010 is used to acquire the operating state and state parameters of the battery system 4000; and to acquire the first required discharge parameters of the first battery pack when the first battery pack is in a discharging state; the control unit 4020 is used to determine a first preset state value and / or a second preset state value based on the first required discharge parameters; and to control the second battery pack to transfer energy to the first battery pack when the first battery pack is in a discharging state, the state parameters of the first battery pack are less than or equal to the first preset state value, and the state parameters of the second battery pack are greater than or equal to the second preset state value.

[0228] In some embodiments, the control unit 4020 is specifically configured to determine, based on the correspondence between the state parameters and the allowable discharge parameters of the first battery pack, the first state parameter corresponding to the first required discharge parameter; and to determine the first preset state value based on the first state parameter.

[0229] In some embodiments, the first preset state value increases as the first required discharge parameter increases.

[0230] In some embodiments, the second preset state value decreases as the first required discharge parameter increases.

[0231] In some embodiments, the control unit 4020 is further configured to control the second battery pack to stop transferring energy to the first battery pack when the state parameter of the first battery pack is greater than a third preset state value, wherein the third preset state value is greater than or equal to the first preset state value.

[0232] In some embodiments, the control unit 4020 is further configured to control the second battery pack to stop transferring energy to the first battery pack when the state parameter of the second battery pack is less than a fourth preset state value, wherein the fourth preset state value is less than or equal to the second preset state value.

[0233] In some embodiments, the acquisition unit 4010 is further configured to acquire a second required discharge parameter of the second battery pack when the second battery pack is in a discharge state; the control unit 4020 is further configured to determine a fifth preset state value and / or a sixth preset state value based on the second required discharge parameter; and to control the first battery pack to transfer energy to the second battery pack when the second battery pack is in a discharge state, the state parameter of the first battery pack is greater than or equal to the fifth preset state value, and the state parameter of the second battery pack is less than or equal to the sixth preset state value.

[0234] In some embodiments, the fifth preset state value decreases as the second required discharge parameter increases.

[0235] In some embodiments, the control unit 4020 is specifically configured to determine, based on the correspondence between the state parameters and allowable discharge parameters of the second battery pack, the second state parameter corresponding to the second required discharge parameter; and to determine the sixth preset state value based on the second state parameter.

[0236] In some embodiments, the sixth preset state value increases or decreases as the second required discharge parameter increases.

[0237] In some embodiments, the control unit 4020 is further configured to control the first battery pack to stop transferring energy to the second battery pack when the state parameter of the second battery pack is greater than a seventh preset state value, wherein the seventh preset state value is greater than or equal to a sixth preset state value.

[0238] In some embodiments, the control unit 4020 is further configured to control the first battery pack to stop transferring energy to the second battery pack when the state parameter of the first battery pack is less than an eighth preset state value, wherein the eighth preset state value is less than or equal to a fifth preset state value.

[0239] It should be understood that the above and other operations and / or functions of the various modules in the battery system 4000 are for the purpose of achieving Figures 2 to 5 For the sake of brevity, the corresponding processes in each method will not be elaborated here.

[0240] Figure 7 A schematic block diagram of a battery management system 5000 according to an embodiment of this application is shown. Figure 7 As shown, the battery management system 5000 includes a processor 5010 and a memory 5020, wherein the memory 5020 is used to store instructions, and the processor 5010 is used to read instructions and execute the methods of the various embodiments of the present application based on the instructions.

[0241] The memory 5020 can be a separate device independent of the processor 5010, or it can be integrated into the processor 5010.

[0242] Optionally, such as Figure 7 As shown, the battery management system 5000 may also include a transceiver 5030, which the processor 5010 can control to communicate with other devices. Specifically, it can send information or data to other devices, or receive information or data sent by other devices.

[0243] It should be understood that the processor in the embodiments of this application may be an integrated circuit chip with signal processing capabilities. In implementation, the steps of the above method embodiments can be completed by integrated logic circuits in the processor's hardware or by instructions in software form. The processor described above can be a general-purpose processor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA), or other programmable logic devices, discrete gate or transistor logic devices, or discrete hardware components. It can implement or execute the methods, steps, and logic block diagrams disclosed in the embodiments of this application. The general-purpose processor can be a microprocessor or any conventional processor. The steps of the methods disclosed in the embodiments of this application can be directly embodied in the execution of a hardware decoding processor, or executed by a combination of hardware and software modules in the decoding processor. The software modules can be located in random access memory, flash memory, read-only memory, programmable read-only memory, electrically erasable programmable memory, registers, or other mature storage media in the art. The storage medium is located in memory, and the processor reads information from the memory and, in conjunction with its hardware, completes the steps of the above method.

[0244] It is understood that the memory in the embodiments of this application can be volatile memory or non-volatile memory, or may include both volatile and non-volatile memory. The non-volatile memory can be read-only memory (ROM), programmable read-only memory (PROM), erasable programmable read-only memory (EPROM), electrically erasable programmable read-only memory (EEPROM), or flash memory. The volatile memory can be random access memory (RAM), which is used as an external cache. By way of example, but not limitation, many forms of RAM are available, such as static random access memory (SRAM), dynamic random access memory (DRAM), synchronous dynamic random access memory (SDRAM), double data rate synchronous dynamic random access memory (DDR SDRAM), enhanced synchronous dynamic random access memory (ESDRAM), synchronous linked dynamic random access memory (SLDRAM), and direct rambus RAM (DR RAM). It should be noted that the memory used in the systems and methods described herein is intended to include, but is not limited to, these and any other suitable types of memory.

[0245] like Figure 8 As shown in the figure, this application embodiment also provides an electrical device 6000, which includes a first load 6010, a second load 6020 and a battery system 4000. The battery system 4000 is connected to the first load 6010 and the second load 6020 and is used to provide a first DC power to the first load 6010 and a second DC power to the second load 6020. The voltage of the first DC power is greater than the voltage of the second DC power.

[0246] In other words, the first load 6010 is a high-voltage load, the second load 6020 is a low-voltage load, and the battery system 4000 provides high-voltage power to the first load 6010 and low-voltage power to the second load 6020.

[0247] For details on the 4000 battery system, please refer to the above text. Figure 6 For the sake of brevity, the relevant descriptions in the original document will not be repeated here.

[0248] This application also provides a computer-readable storage medium for storing computer programs.

[0249] When the computer program is run on a computer, it causes the computer to perform the various methods of the embodiments of this application.

[0250] This application also provides a computer program product, including computer program instructions.

[0251] When the computer program instructions are run on a computer, the computer causes the computer to perform the various methods of the embodiments of this application.

[0252] This application also provides a computer program.

[0253] When the computer program is run on a computer, it causes the computer to perform the various methods of the embodiments of this application.

[0254] Those skilled in the art will recognize that the units and algorithm steps of the various examples described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.

[0255] Those skilled in the art will understand that, for the sake of convenience and brevity, the specific working processes of the systems, devices, and units described above can be referred to the corresponding processes in the foregoing method embodiments, and will not be repeated here.

[0256] In the several embodiments provided in this application, it should be understood that the disclosed systems, apparatuses, and methods can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative. For instance, the division of units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. In addition, the mutual coupling or direct coupling or communication connection involved in the embodiments of this application may be through some interfaces, and the indirect coupling or communication connection of devices or units may be electrical, mechanical, or other forms.

[0257] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0258] In addition, the functional units in the various embodiments of this application can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit.

[0259] If the aforementioned functions are implemented as software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, or a portion of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of this application. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, ROM, RAM, magnetic disks, or optical disks.

[0260] Although this application has been described with reference to preferred embodiments, various modifications can be made thereto and components can be replaced with equivalents without departing from the scope of this application. In particular, the technical features mentioned in the various embodiments can be combined in any manner, provided there is no structural conflict. This application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A battery system energy management method, characterized in that, The battery system includes a first battery pack and a second battery pack, and the method includes: The operating state and state parameters of the battery system are obtained, wherein the operating state is used to indicate that the first battery pack and / or the second battery pack is in a discharge state. When the first battery pack is in a discharging state, obtain the first required discharge parameters of the first battery pack. Based on the first demand discharge parameter, a first preset state value and / or a second preset state value are determined, wherein the first preset state value increases as the first demand discharge parameter increases, and / or the second preset state value decreases as the first demand discharge parameter increases. When the first battery pack is in a discharging state, the state parameter of the first battery pack is less than or equal to the first preset state value, and the state parameter of the second battery pack is greater than or equal to the second preset state value, the second battery pack is controlled to transfer energy to the first battery pack.

2. The method according to claim 1, characterized in that, The step of determining the first preset state value and / or the second preset state value based on the first required discharge parameters includes: Based on the correspondence between the state parameters and the allowable discharge parameters of the first battery pack, determine the first state parameters corresponding to the first requirement discharge parameters when the allowable discharge parameters of the first battery pack meet the first requirement discharge parameters. The first preset state value is determined based on the first state parameter.

3. The method according to claim 1, characterized in that, The method further includes: When the state parameters of the first battery pack are greater than a third preset state value, the second battery pack is controlled to stop transferring energy to the first battery pack, wherein the third preset state value is greater than or equal to the first preset state value.

4. The method according to claim 1, characterized in that, The method further includes: When the state parameter of the second battery pack is less than the fourth preset state value, the second battery pack is controlled to stop transferring energy to the first battery pack, wherein the fourth preset state value is less than or equal to the second preset state value.

5. The method according to claim 1, characterized in that, The method further includes: When the second battery pack is in a discharging state, obtain the second required discharge parameters of the second battery pack; Based on the second required discharge parameters, determine the fifth preset state value and / or the sixth preset state value; When the second battery pack is in a discharging state, the state parameter of the first battery pack is greater than or equal to the fifth preset state value, and the state parameter of the second battery pack is less than or equal to the sixth preset state value, the first battery pack is controlled to transfer energy to the second battery pack.

6. The method according to claim 5, characterized in that, The fifth preset state value decreases as the second required discharge parameter increases.

7. The method according to claim 5, characterized in that, The step of determining the fifth preset state value and / or the sixth preset state value based on the second required discharge parameters includes: Based on the correspondence between the state parameters and allowable discharge parameters of the second battery pack, determine the second state parameters corresponding to the allowable discharge parameters of the second battery pack when they meet the second required discharge parameters; The sixth preset state value is determined based on the second state parameter.

8. The method according to claim 5, characterized in that, The sixth preset state value increases as the second required discharge parameter increases.

9. The method according to claim 5, characterized in that, The method further includes: If the state parameter of the second battery pack is greater than the seventh preset state value, the first battery pack is controlled to stop transferring energy to the second battery pack, wherein the seventh preset state value is greater than or equal to the sixth preset state value.

10. The method according to claim 5, characterized in that, The method further includes: If the state parameter of the first battery pack is less than the eighth preset state value, the first battery pack is controlled to stop transferring energy to the second battery pack, wherein the eighth preset state value is less than or equal to the fifth preset state value.

11. A battery system, characterized in that, The battery system includes a first battery pack and a second battery pack, the system comprising: The acquisition unit acquires the operating state and state parameters of the battery system, wherein the operating state is used to indicate that the first battery pack and / or the second battery pack is in a discharging state; and When the first battery pack is in a discharging state, obtain the first required discharge parameters of the first battery pack. A control unit is configured to determine a first preset state value and / or a second preset state value based on the first demand discharge parameter, wherein the first preset state value increases as the first demand discharge parameter increases, and / or the second preset state value decreases as the first demand discharge parameter increases; and When the first battery pack is in a discharging state, the state parameter of the first battery pack is less than or equal to the first preset state value, and the state parameter of the second battery pack is greater than or equal to the second preset state value, the second battery pack is controlled to transfer energy to the first battery pack.

12. A battery management system, characterized in that, The battery management system includes a memory and a processor, the memory being used to store instructions, and the processor being used to read the instructions and execute the method as described in any one of claims 1 to 10 according to the instructions.

13. An electrical appliance, characterized in that, The electrical equipment includes: First load; Second load; And the battery system as claimed in claim 11, the battery system being connected to the first load and the second load for providing a first direct current to the first load and a second direct current to the second load, wherein the voltage of the first direct current is greater than the voltage of the second direct current.

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