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

Abstract

The embodiment of the invention provides a battery system energy management method, a battery system, a battery management system and electric equipment. The method comprises the following steps: acquiring a working state and a state parameter of the battery system; controlling the first battery pack to transfer energy to the second battery pack when the second battery pack is in a standing state and lasts for a first preset time, the state parameter of the first battery pack is greater than or equal to a first preset state value, and the state parameter of the second battery pack is less than or equal to a second preset state value; and if the state parameter energy of the first battery pack is transferred to be less than a third preset state value, controlling the first battery pack to stop transferring energy to the second battery pack. According to the battery system energy management method, the battery system, the battery management system and the electric equipment provided by the embodiment of the invention, the performance of the battery system can be improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of batteries, and more particularly to a battery system energy management method, a battery system, a battery management system and a power consumption device. BACKGROUND

[0002] In the field of new energy, batteries, as the main power source of power consumption devices such as electric vehicles, ships or spacecraft, are of great importance. Therefore, for power consumption devices, battery technology is an important factor for their development.

[0003] Therefore, how to improve the performance of the battery system is one of the problems to be solved at present. SUMMARY

[0004] The embodiments of the present application provide a battery system energy management method, a battery system, a battery management system and a power consumption 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 comprising a first battery pack and a second battery pack, the method comprising: obtaining a working state and a state parameter of the battery system, the working state of the battery system being used to indicate that the first battery pack and / or the second battery pack is in a charging, discharging or resting state; in a case where the second battery pack is in the resting state and lasts for a first preset time, the state parameter of the first battery pack is greater than or equal to a first preset state value, and the state parameter of the second battery pack is less than or equal to a second preset state value, controlling the first battery pack to perform energy transfer to the second battery pack; in a case where the first battery pack performs energy transfer to the second battery pack, if the state parameter of the first battery pack is less than a third preset state value, controlling the first battery pack to stop energy transfer to the second battery pack, the third preset state value being less than or equal to the first preset state value.

[0006] In the embodiments of the present application, in a case where the second battery pack is in the resting state and lasts for a first preset time, the state parameter of the first battery pack is greater than or equal to a first preset state value, and the state parameter of the second battery pack is less than or equal to a second preset state value, the first battery pack can be controlled to perform energy transfer to the second battery pack, so as to reduce the risk of over-discharge caused by the continuous decrease of the state parameter of the second battery pack due to self-discharge of the second battery pack when the second battery pack is in the resting state for a long time, and improve the performance and service life of the second battery pack; in a case where the state parameter of the first battery pack is less than a third preset state value, the first battery pack is controlled to stop energy transfer to the second battery pack, which can reduce the influence of the state parameter of the first battery pack being too low on the first battery pack. In this way, the influence of the state parameters of the first battery pack and the second battery pack being too low on the battery system can be reduced, and the performance and service life of the battery system can be improved.

[0007] In a possible implementation, in a case where the second battery pack is in the resting state for a first preset time, the state parameter of the first battery pack is greater than or equal to a first preset state value, and the state parameter of the second battery pack is less than or equal to a second preset state value, the method further includes: controlling the first battery pack to perform energy transfer to the second battery pack in a case where the first battery pack and the second battery pack are both in the resting state for the first preset time, the state parameter of the first battery pack is greater than or equal to the first preset state value, and the state parameter of the second battery pack is less than or equal to the second preset state value.

[0008] In the embodiments of the present application, in a case where the first battery pack and the second battery pack are both in the resting state for a first preset time, the state parameter of the first battery pack is greater than or equal to a second preset state value, and the state parameter of the second battery pack is less than or equal to a third preset state value, the first battery pack can be controlled to perform energy transfer to the second battery pack, thereby reducing the risk of over-discharge due to continuous reduction of the state parameter of the second battery pack caused by self-discharge of the second battery pack when the second battery pack is in the resting state for a long time, such as when the power consumption device is in the storage state for a long time, and improving the performance and service life of the second battery pack.

[0009] In a possible implementation, before controlling the first battery pack to perform energy transfer to the second battery pack, the method further includes: in a case where the second battery pack is in the resting state for a first preset time, obtaining a first required discharge parameter of the first battery pack; determining, according to a corresponding relationship between the state parameter and the allowable discharge parameter of the first battery pack, a first state parameter corresponding to a case where the allowable discharge parameter of the first battery pack meets the first required discharge parameter; and determining the first preset state value according to the first state parameter.

[0010] In the embodiments of the present application, the state parameter value corresponding to a case where the allowable discharge parameter of the first battery pack meets the first required discharge parameter can be determined according to the corresponding relationship between the state parameter and the allowable discharge parameter of the first battery pack, and then the first preset state value can be determined according to the corresponding state parameter value, so that the state parameter of the first battery pack can meet its discharge requirement based on the first preset state value while the first battery pack is used to supplement energy for the second battery pack, so as to meet the power consumption requirement of the power consumption device and improve user experience.

[0011] In a possible implementation, before controlling the first battery pack to perform energy transfer to the second battery pack, the method further includes: in a case where the second battery pack is in the resting state for a first preset time, obtaining a first required discharge parameter of the first battery pack; and determining the first preset state value according to the first required discharge parameter, the first preset state value increasing with an increase of the first required discharge parameter.

[0012] In the embodiments of the present application, the first preset state value can be flexibly adjusted according to the first demand discharge parameter of the first battery pack, so that when the first demand discharge parameter of the first battery pack is relatively high, the state parameter of the first battery pack is greater than or equal to a relatively large value, and only then can the first battery pack be controlled to perform energy transfer to the second battery pack; or when the first demand discharge parameter of the first battery pack is relatively low, the state parameter of the first battery pack is greater than or equal to a relatively small value, and only then can the first battery pack be controlled to perform energy transfer to the second battery pack. In this way, based on the first preset state value, the time and / or frequency of energy transfer from the first battery pack to the second battery pack can be flexibly adjusted on the premise of providing reliable power supply for the power consumption equipment, and the performance and service life of the battery system are improved.

[0013] In a possible implementation, the method further includes: in the case that the first battery pack performs energy transfer to the second battery pack, if the state parameter of the second battery pack is greater than a fourth preset state value, controlling the first battery pack to stop energy transfer to the second battery pack, wherein the fourth preset state value is greater than or equal to the second preset state value.

[0014] In the embodiments of the present application, the first battery pack can be controlled to stop energy transfer to the second battery pack when the state parameter of the second battery pack is greater than or equal to the fourth preset state value after energy transfer, so that the energy transferred to the second battery pack can provide energy for self-discharge of the second battery pack, reduce the risk of over-discharge of the second battery pack due to self-discharge, and improve the performance and service life of the second battery pack.

[0015] In a possible implementation, the method includes: in the case that the first battery pack is in a stationary state for a second preset time, the state parameter of the first battery pack is less than or equal to a fifth preset state value, and the state parameter of the second battery pack is greater than or equal to a sixth preset state value, controlling the second battery pack to perform energy transfer to the first battery pack.

[0016] In the embodiments of the present application, the second battery pack can be controlled to perform energy transfer to the first battery pack in the case that the first battery pack is in a stationary state for a second preset time, the state parameter of the first battery pack is less than or equal to a fifth preset state value, and the state parameter of the second battery pack is greater than or equal to a sixth preset state value, so that the risk of over-discharge of the first battery pack due to continuous reduction of the state parameter of the first battery pack caused by self-discharge of the first battery pack when the first battery pack is in a stationary state for a long time can be reduced, and the performance and service life of the first battery pack are improved.

[0017] In a possible implementation, in a case where the first battery pack is in the resting state for a second preset time, the state parameter of the first battery pack is less than or equal to a fifth preset state value, and the state parameter of the second battery pack is greater than or equal to a sixth preset state value, the method further includes: in a case where the first battery pack and the second battery pack are both in the resting state for the second preset time, the state parameter of the first battery pack is less than or equal to the fifth preset state value, and the state parameter of the second battery pack is greater than or equal to the sixth preset state value, controlling the second battery pack to perform energy transfer to the first battery pack.

[0018] In the embodiments of the present application, in a case where the first battery pack and the second battery pack are both in the resting state for a second preset time, the state parameter of the first battery pack is less than or equal to a fifth preset state value, and the state parameter of the second battery pack is greater than or equal to a sixth preset state value, the second battery pack can be controlled to perform energy transfer to the first battery pack, thereby reducing the risk of over-discharge due to self-discharge of the first battery pack when the first battery pack is in the resting state for a long time, such as in a storage state for a long time, and improving the performance and service life of the first battery pack.

[0019] In some embodiments, before the second battery pack is controlled to perform energy transfer to the first battery pack, the method further includes: in a case where the first battery pack and the second battery pack are in the resting state for a second preset time, obtaining a second required discharge parameter of the second battery pack; determining a second state parameter corresponding to a case where the allowable discharge parameter of the second battery pack meets the second required discharge parameter according to a corresponding relationship between the state parameter and the allowable discharge parameter of the second battery pack; and determining the sixth preset state value according to the second state parameter.

[0020] In the embodiments of the present application, the state parameter value corresponding to a case where the allowable discharge parameter of the second battery pack meets the second required discharge parameter can be determined according to the corresponding relationship between the state parameter and the allowable discharge parameter of the second battery pack, and then the sixth preset state value can be determined according to the corresponding state parameter value, so that the state parameter of the second battery pack can meet the future discharge requirement while the second battery pack is used to supplement the energy of the first battery pack based on the sixth preset state value, to meet the power demand of the power consumption device and improve the user experience.

[0021] In some embodiments, before the second battery pack is controlled to perform energy transfer to the first battery pack, the method further includes: in a case where the first battery pack and the second battery pack are in the resting state for a second preset time, obtaining a second required discharge parameter of the second battery pack; and determining the sixth preset state value according to the second required discharge parameter, the sixth preset state value increasing with the increase of the second required discharge parameter.

[0022] In the embodiments of the present application, the sixth preset state value can be flexibly adjusted according to the size of the second demand discharge parameter of the second battery pack, so that when the second demand discharge parameter of the second battery pack is relatively high, the state parameter of the second battery pack is greater than or equal to a relatively large value, and then the second battery pack can be controlled to perform energy transfer to the first battery pack; or when the second demand discharge parameter of the second battery pack is relatively low, the state parameter of the second battery pack is greater than or equal to a relatively small value, and then the second battery pack can be controlled to perform energy transfer to the first battery pack. In this way, based on the sixth preset state value, the time and / or the number of times of energy transfer from the second battery pack to the first battery pack can be flexibly adjusted on the premise of providing reliable power supply for the power consumption equipment, and the performance and the service life of the battery system are improved.

[0023] In a possible implementation, the method further includes: in the case that the second battery pack performs energy transfer to the first battery pack, if the state parameter of the first battery pack is greater than or equal to a seventh preset state value, controlling the second battery pack to stop energy transfer to the first battery pack, the seventh preset state value being greater than or equal to the fifth preset state value.

[0024] In the embodiments of the present application, when the first battery pack is energy transferred to a state parameter greater than or equal to the seventh preset value, the energy transfer of the second battery pack to the first battery pack can be stopped. In this way, the energy transferred to the first battery pack can provide energy for the self-discharge of the first battery pack, reduce the risk of over-discharge of the first battery pack due to self-discharge, and improve the performance and the service life of the first battery pack.

[0025] In a possible implementation, the method further includes: in the case that the second battery pack performs energy transfer to the first battery pack, if the state parameter of the second battery pack is less than an eighth preset state value, controlling the first battery pack to stop energy transfer to the second battery pack, the eighth preset state value being less than the sixth preset state value.

[0026] In the embodiments of the present application, in the case that the state parameter of the second battery pack is less than the eighth preset state value, the first battery pack is controlled to stop energy transfer to the second battery pack, which can reduce the influence of the state parameter of the first battery pack being too low on the first battery pack when the first battery pack performs energy transfer to the second battery pack.

[0027] In a second aspect, a battery system is provided, comprising a first battery pack and a second battery pack, and further comprising: an obtaining unit configured to obtain an operating state of the battery system and a state parameter, the operating state of the battery system being used to indicate that the first battery pack and / or the second battery pack is in a charging state, a discharging state or a resting state; a control unit configured to, in a case that the second battery pack is in the resting state for a first preset time, the state parameter of the first battery pack is greater than or equal to a first preset state value, and the state parameter of the second battery pack is less than or equal to a second preset state value, control the first battery pack to perform energy transfer to the second battery pack; and in a case that the first battery pack performs energy transfer to the second battery pack, if the state parameter of the first battery pack is less than a third preset state value, control the first battery pack to stop performing energy transfer to the second battery pack, the third preset state value being less than or equal to the first preset state value.

[0028] In a possible implementation, the control unit is specifically configured to, in a case that the first battery pack and the second battery pack are both in the resting state for the first preset time, the state parameter of the first battery pack is greater than or equal to the first preset state value, and the state parameter of the second battery pack is less than or equal to the second preset state value, control the first battery pack to perform energy transfer to the second battery pack.

[0029] In a possible implementation, the obtaining unit is further configured to, in a case that the second battery pack is in the resting state for the first preset time, obtain a first required discharging parameter of the first battery pack; and the control unit is further configured to determine a second state parameter corresponding to a case that the allowable discharging parameter of the first battery pack satisfies the first required discharging parameter according to a correspondence between the state parameter and the allowable discharging parameter of the first battery pack, and determine the first preset state value according to the second state parameter.

[0030] In a possible implementation, the obtaining unit is further configured to, in a case that the second battery pack is in the resting state for the first preset time, obtain a first required discharging parameter of the first battery pack after the first preset time; and the control unit is further configured to determine the first preset state value according to the first required discharging parameter, the first preset state value increasing with an increase of the first required discharging parameter.

[0031] In a possible implementation, the control unit is further configured to, in a case that the first battery pack performs energy transfer to the second battery pack, if the state parameter of the second battery pack is greater than a fourth preset state value, control the first battery pack to stop performing energy transfer to the second battery pack, the fourth preset state value being greater than or equal to the second preset state value.

[0032] In a possible implementation, the control unit is further configured to control the second battery pack to perform energy transfer to the first battery pack when the first battery pack is in the resting state for a second preset time, the state parameter of the first battery pack is less than or equal to a fifth preset state value, and the state parameter of the second battery pack is greater than or equal to a sixth preset state value.

[0033] In a possible implementation, the control unit is specifically configured to control the second battery pack to perform energy transfer to the first battery pack when the first battery pack and the second battery pack are both in the resting state for a second preset time, the state parameter of the first battery pack is less than or equal to a fifth preset state value, and the state parameter of the second battery pack is greater than or equal to a sixth preset state value.

[0034] In a possible implementation, the acquisition unit is further configured to acquire a second required discharge parameter of the second battery pack when the first battery pack is in the resting state for a second preset time; and the control unit is further configured to determine a second state parameter corresponding to a case where the allowable discharge parameter of the second battery pack meets the second required discharge parameter according to the correspondence between the state parameter and the allowable discharge parameter of the second battery pack, and determine the sixth preset state value according to the second state parameter.

[0035] In a possible implementation, the acquisition unit is further configured to acquire a second required discharge parameter of the second battery pack when the first battery pack is in the resting state for a second preset time; and the control unit is further configured to determine the sixth preset state value according to the second required discharge parameter, and increase the sixth preset state value with an increase of the second required discharge parameter.

[0036] In a possible implementation, the control unit is further configured to control the second battery pack to stop performing energy transfer to the first battery pack when the state parameter of the first battery pack is greater than a seventh preset state value, if the second battery pack performs energy transfer to the first battery pack, the seventh preset state value is greater than or equal to the fifth preset state value.

[0037] In a possible implementation, the control unit is further configured to control the first battery pack to stop performing energy transfer to the second battery pack when the state parameter of the second battery pack is less than an eighth preset state value, if the second battery pack performs energy transfer to the first battery pack, the eighth preset state value is less than or equal to the sixth preset state value.

[0038] In a third aspect, a battery management system is provided, which includes a memory and a processor, the memory is configured to store instructions, and the processor is configured to read the instructions and perform the method in the first aspect and any possible implementation of the first aspect.

[0039] In a fourth aspect, a power consuming device is provided, comprising a first load; a second load; and the battery system in any possible implementation manner of the second aspect, the battery system being connected with the first load and the second load, for providing the first load with a first direct current and providing the second load with a second direct current, the voltage of the first direct current being greater than the voltage of the second direct current.

[0040] In a fifth aspect, a chip is provided, comprising: a processor, configured to invoke and run a computer program from a memory, so that a device installed with the chip performs the method in the first aspect and any possible implementation manner of the first aspect.

[0041] In a sixth aspect, a computer program is provided, when the computer program is executed by a computer, the computer program causes the computer to implement the method in the first aspect and any possible implementation manner of the first aspect.

[0042] In a seventh aspect, a computer readable storage medium is provided, the computer readable storage medium is configured to store a computer program, when the computer program is executed by a computer, the computer program causes the computer to implement the method in the first aspect and any possible implementation manner of the first aspect.

[0043] In an eighth aspect, a computer program product is provided, comprising computer program instructions, when the computer program instructions are executed by a computer, the computer program instructions causes the computer to implement the method in the first aspect and any possible implementation manner of the first aspect. BRIEF DESCRIPTION OF DRAWINGS

[0044] Figure 1 A schematic diagram of the battery system provided by the embodiments of the present application.

[0045] Figure 2 A flowchart of the battery system energy management method provided by the embodiments of the present application.

[0046] Figure 3 Another flowchart of the battery system energy management method provided by the embodiments of the present application.

[0047] Figure 4 Another flowchart of the battery system energy management method provided by the embodiments of the present application.

[0048] Figure 5 A schematic block diagram of the battery system provided by the embodiments of the present application.

[0049] Figure 6 A schematic block diagram of the battery management system provided by the embodiments of the present application.

[0050] Figure 7 A schematic block diagram of the power consuming device provided by the embodiments of the present application. DETAILED DESCRIPTION

[0051] The embodiments of the present application will be further described in details with reference to the drawings and embodiments. The following detailed description of the embodiments and the drawings are used to exemplarily illustrate the principles of the present application, but cannot be used to limit the scope of the present application, i.e., the present application is not limited to the described embodiments.

[0052] In the description of the embodiments of the present application, the technical terms "first", "second", and the like are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "a plurality of" is two or more, unless otherwise explicitly and specifically limited. The terms "include" and "have" and any variations thereof in the specification and claims of the present application and the above description of the drawings are intended to cover non-exclusive inclusion.

[0053] The term "and / or" is only a description of the association relationship of the associated objects, which means that there can be three relationships, for example, A and / or B, which can represent the three cases of A alone, A and B together, and B alone. In addition, the character " / " in this paper generally represents that the front and rear associated objects have an "or" relationship.

[0054] In this paper, the phrase "embodiment" means that the specific features, structures or characteristics described in conjunction with the embodiment can be included in at least one embodiment of the present application. The appearance of this phrase in the specification does not necessarily mean the same embodiment, nor is it an independent or alternative embodiment that is not mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0055] In this application, the positions or position relationships indicated by the terms "upper", "lower", "left", "right", "inner", "outer", and the like are only for the convenience of describing the present application and simplifying the description, and are not intended to indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. "Vertical" is not strictly vertical, but within the allowable range of error. "Parallel" is not strictly parallel, but within the allowable range of error.

[0056] 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.

[0057] 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.

[0058] 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.

[0059] Due to self-discharge, multi-energy-area (multi-cell) battery systems may be over-discharged, affecting the performance of the battery system.

[0060] To address the aforementioned issues, 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, wherein the operating state of the battery system is used to indicate that the first battery pack and / or the second battery pack are in a charging, discharging, or resting state; when the second battery pack is in a resting state for a first preset time, the state parameter of the first battery pack is greater than or equal to a first preset state value, and the state parameter of the second battery pack is less than or equal to a second preset state value, controlling the first battery pack to transfer energy to the second battery pack; when the first battery pack is transferring energy to the second battery pack, if the state parameter of the first battery pack is less than a third preset state value, controlling the first battery pack to stop transferring energy to the second battery pack, wherein the third preset state value is less than or equal to the first preset state value.

[0061] 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.

[0062] The following combination Figure 1 The battery system described above, which has multiple independent energy zones, is given an example.

[0063] 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.

[0064] 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.

[0065] As an example, each energy zone's battery pack can individually power the load of the electrical equipment.

[0066] For example, the first and second battery packs can supply power to the load of the electrical equipment independently.

[0067] 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 first battery pack is depleted or fails, the other battery pack can be switched to supply power to the load of the electrical equipment.

[0068] 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.

[0069] As an example, the first and second battery packs can be charged via a charging device.

[0070] As an example, a charging device may include a charging station and / or a charging gun.

[0071] As an example, the first and second battery packs can be charged separately or as a whole.

[0072] 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.

[0073] 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.

[0074] As an example, energy can be transferred between the first battery pack and the second battery pack.

[0075] 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.

[0076] As an example, a battery system may also include a battery management system.

[0077] 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.

[0078] 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.

[0079] 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.

[0080] 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.

[0081] 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.

[0082] It should be understood thatFigure 1 The components shown are just examples. In actual applications, the components may have different names, or they may be added or deleted as needed.

[0083] The following combination Figures 2 to 5 The energy management method for a battery system provided in the embodiments of this application will be described by way of example.

[0084] Figure 2 This is a schematic flowchart of a battery system energy management method provided in an embodiment of this application. The battery system includes a first battery pack and a second battery pack.

[0085] 210. Obtain the operating status and status parameters of the battery system.

[0086] The operating status of the battery system is used to indicate whether the first battery pack and / or the second battery pack are in a charging, discharging, or resting state.

[0087] As an example, the state parameters of the battery system include the state parameters of the first battery pack and the state parameters of the second battery pack. The state parameters of the first battery pack include the voltage parameters and / or the state of charge (SOC) parameters of the first battery pack, and the state parameters of the second battery pack include the voltage parameters and / or the SOC parameters of the second battery pack.

[0088] A battery pack in a quiescent state refers to a state in which the battery pack is neither being charged nor discharged.

[0089] As an example, the operating state of the battery system can include different situations: such as both the first battery pack and the second battery pack being in a charging state; or both the first battery pack and the second battery pack being in a discharging state; or both the first battery pack and the second battery pack being in a stationary state; or the first battery pack being in a discharging state and the second battery pack being in a stationary state; or the first battery pack being in a stationary state and the second battery pack being in a discharging state, etc.

[0090] 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.

[0091] 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.

[0092] 220. When the second battery pack is in a static state for a first preset time, the state parameters of the first battery pack are greater than or equal to the first preset state value, and the state parameters of the second battery pack are less than or equal to the second preset state value, the first battery pack is controlled to transfer energy to the second battery pack.

[0093] The second battery pack being in a static state for a first preset time means that the second battery pack neither charges nor discharges for a period of time.

[0094] As an example, it can be determined whether the second battery pack is charging or discharging based on its charging and discharging parameters (such as charging and discharging current, voltage, or power). For instance, if the charging and discharging current of the second battery pack is less than or equal to a preset charging and discharging current and continues for a first preset time, the second battery pack can be considered to be in a static state for the same duration.

[0095] In this embodiment, the first preset time can be long or short. For example, it can be several hours or several months.

[0096] The first preset time can be determined based on the second preset state value and the self-discharge capacity of the second battery pack. For example, if the second preset state value is relatively large and the self-discharge capacity of the second battery pack is relatively weak, the first preset time can be set to be relatively long; conversely, the first preset time can be set to be relatively short.

[0097] If the state parameters of the first battery pack are greater than or equal to the first preset state value, and the state parameters of the second battery pack are less than or equal to the second preset state value, it indicates that the first battery pack has the ability to transfer energy to the second battery pack, and the second battery pack needs to obtain energy.

[0098] Therefore, if the first battery pack has the ability to transfer energy to the second battery pack when the second battery pack is in a static state for a long time, and the second battery pack needs to obtain energy, the first battery pack can be controlled to transfer energy to the second battery pack.

[0099] 230. When the first battery pack is transferring energy to the second battery pack, if the state parameter of the first battery pack is less than the third preset state value, the first battery pack is controlled to stop transferring energy to the second battery pack.

[0100] The third preset state value is less than or equal to the first preset state value.

[0101] In this embodiment, when the second battery pack is in a static state for a first preset time, the state parameters of the first battery pack are greater than or equal to a first preset state value, and the state parameters of the second battery pack are less than or equal to a second preset state value, energy transfer from the first battery pack to the second battery pack can be controlled. This reduces the risk of over-discharge due to the continuous decrease in the state parameters of the second battery pack caused by self-discharge when the second battery pack is in a static state for a long time, thereby improving the performance and lifespan of the second battery pack. When the state parameters of the first battery pack are less than a third preset state value, the energy transfer from the first battery pack to the second battery pack is stopped, reducing the impact of excessively low state parameters on the first battery pack. Thus, the impact of excessively low state parameters of both the first and second battery packs on the battery system can be reduced, improving the performance and lifespan of the battery system.

[0102] In some embodiments, energy transfer from the first battery pack to the second battery pack can be controlled when the first battery pack is in a static state for a first preset time, the second battery pack is in a discharging state, the state parameter of the first battery pack is greater than or equal to the first preset state value, and the state parameter of the second battery pack is less than or equal to the second preset state value.

[0103] In some embodiments, energy transfer from the first battery pack to the second battery pack can be controlled when both the first battery pack and the second battery pack are in a static state for a first preset time, the state parameter of the first battery pack is greater than or equal to the first preset state value, and the state parameter of the second battery pack is less than or equal to the second preset state value.

[0104] The first battery pack and the second battery pack are both in a static state for a first preset time, which can mean that the first battery pack and the second battery pack have not been charged or discharged for a relatively long time.

[0105] In this embodiment of the application, when both the first battery pack and the second battery pack are in a static state for a first preset time, and the state parameter of the first battery pack is greater than or equal to the first preset state value and the state parameter of the second battery pack is less than or equal to the second preset state value, energy transfer from the first battery pack to the second battery pack can be controlled. This reduces the risk of over-discharge due to the continuous decrease in the state parameter of the second battery pack caused by self-discharge when the second battery pack is in a static state for a long time, thereby improving the performance and service life of the second battery pack.

[0106] In some embodiments, the first preset state value may be greater than the limit allowed for the state parameters of the first battery pack.

[0107] As an example, the first preset state value can be the lower limit of the state parameters of the first battery pack plus a fixed value. For example, if the lower limit of the SOC parameter in the first battery pack is 20%, the first preset state value can be 30%, which allows for a certain margin in the self-discharge of the first battery pack. For example, if the lower limit of the SOC parameter in the first battery pack is 20%, the first preset state value can be 60%, which not only allows for a certain margin in the self-discharge of the first battery pack, but also provides a reliable power supply for the operation of subsequent electrical equipment.

[0108] In this embodiment of the application, by setting a first preset state value greater than the lower limit allowed by the state parameters of the first battery pack, energy can be replenished to the second battery pack when the first battery pack is greater than the lower limit allowed by its state parameters, that is, when the first battery pack has the ability to transmit energy to the outside, thereby reducing the risk of over-discharge of the first battery pack.

[0109] In some embodiments, the first preset state value can be a fixed value or a variable value.

[0110] In some embodiments, before step 220, the first required discharge parameter of the first battery pack can be obtained when the second battery pack is in a static state for a first preset time; the first state parameter corresponding to the first battery pack satisfying the first required discharge parameter can be determined according to the correspondence between the state parameter and the allowable discharge parameter of the first battery pack; and the first preset state value can be determined according to the first state parameter.

[0111] As an example, the first demand discharge parameter may include the current demand discharge parameter of the first battery pack, or it may include the future demand discharge parameter of the first battery pack.

[0112] 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.

[0113] As an example, the first required discharge parameter may include at least one of discharge current, discharge voltage, or discharge power.

[0114] For example, when the second battery pack is in a static state for a first preset time and the first battery pack is in a discharging state, the first required discharge parameter can be the current required discharge parameter of the first battery pack. As another example, when the second battery pack is in a static state for a first preset time and the first battery pack is also in a static state, the first required discharge parameter can be the future required discharge parameter of the first battery pack.

[0115] As an example, the first state parameter corresponding to the first battery pack's allowable discharge parameter meeting the first required discharge parameter can be determined based on the correspondence diagram (or table, or other form of correspondence) between the first battery pack's state parameters and allowable discharge parameters. Then, the first preset state value can be determined based on the value of the first state parameter. The following example, using SOC as the state parameter and discharge power as the discharge parameter, provides an exemplary description of how to determine the first preset state value.

[0116] 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%).

[0117] 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 minimum discharge power required by 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%).

[0118] In this embodiment of the application, based on the correspondence between the state parameters and the allowable discharge parameters of the first battery pack, the state parameter value corresponding to the allowable discharge parameters of the first battery pack that meet the discharge parameters required by the first battery is determined. Then, based on the corresponding state parameter value, a first preset state value is determined. Thus, based on the first preset state value, while the first battery pack is replenishing energy to the second battery pack, the state parameters of the first battery pack can meet its discharge requirements, thereby meeting the power consumption requirements of the electrical equipment and improving the user experience.

[0119] In some embodiments, before step 220, when the second battery pack is in a static state for a first preset time, the first demand discharge parameter of the first battery pack is obtained; a first preset state value is determined based on the first demand discharge parameter, and the first preset state value increases as the first demand discharge parameter increases.

[0120] 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.

[0121] In other words, when the first demand discharge parameter is relatively large, the first preset state value can be set to a relatively large value. Then, when the state parameter value of the first battery pack is greater than or equal to a relatively large value, the energy transfer from the first battery pack to the second battery pack can be controlled. Alternatively, when the first demand discharge parameter is relatively small, the first preset state value can be set to a relatively small value. Then, when the state parameter value of the first battery pack is greater than or equal to a relatively small value, the energy transfer from the first battery pack to the second battery pack can be controlled.

[0122] 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.

[0123] In this embodiment, the first preset state value can be flexibly adjusted according to the magnitude of the first required discharge parameter of the first battery pack. This allows for energy transfer from the first battery pack to the second battery pack only when the first required discharge parameter is relatively high and the state parameter is greater than or equal to a relatively large value; conversely, it allows for energy transfer from the first battery pack to the second battery pack only when the first required discharge parameter is relatively low and the state parameter is greater than or equal to a relatively small value. Thus, based on the first preset state value, while providing a flexible and reliable power supply to the electrical equipment, the time 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.

[0124] In some embodiments, the second preset state value is greater than the lower limit allowed by the state parameters of the second battery pack.

[0125] 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, affecting its performance. Therefore, replenishing the energy to the second battery pack before its state parameters reach or just reach their permissible lower limit can reduce the risk of over-discharge.

[0126] 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 first battery pack can be controlled to transfer energy to the second battery pack 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 caused by self-discharge on the performance and service life of the second battery pack when it is at rest.

[0127] In some embodiments, the second preset state value can be a fixed value or a variable value.

[0128] In some embodiments, before step 220, when the second battery pack is in a static state for a first preset time, a first demand discharge parameter of the first battery pack is obtained; a second preset state value is determined based on the first demand discharge parameter, and the second preset state value decreases as the first demand discharge parameter increases.

[0129] In this embodiment, the second preset state value may decrease continuously as the first required discharge parameter increases, or the second preset state value may decrease stepwise as the first required discharge parameter increases.

[0130] In other words, when the first demand discharge parameter is relatively large, the second preset state value can be set to a relatively small value. Then, when the state parameter value of the second battery pack is consumed to a relatively low level, it is necessary to control the first battery pack to transfer energy to the second battery pack. Alternatively, when the first demand discharge parameter is relatively small, the second preset state value can be set to a relatively large value. Then, when the state parameter value of the second battery pack is consumed to a relatively high level, it is necessary to control the first battery pack to transfer energy to the second battery pack.

[0131] 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.

[0132] In this embodiment, the second preset state value can be flexibly adjusted according to the magnitude of the first required discharge parameter of the first battery pack. This allows for energy transfer from the first battery pack to the second battery pack only when the first required discharge parameter of the first battery pack is relatively high and the state parameter of the second battery pack is less than or equal to a relatively small value; conversely, it allows for energy transfer from the first battery pack to the second battery pack only when the first required discharge parameter of the first battery pack is relatively low and the state parameter of the second battery pack is less than or equal to a relatively large value. Thus, based on the second preset state value, while providing a flexible and reliable power supply to the electrical equipment, the time 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.

[0133] Figure 3 This is another schematic flowchart of the battery system energy management method provided in the embodiments of this application.

[0134] 310. Obtain the operating status and status parameters of the battery system.

[0135] The operating status of the battery system is used to indicate whether the first battery pack and / or the second battery pack are in a charging, discharging, or resting state.

[0136] 320. When the second battery pack is in a static state for a first preset time, the state parameters of the first battery pack are greater than or equal to the first preset state value, and the state parameters of the second battery pack are less than or equal to the second preset state value, the first battery pack is controlled to transfer energy to the second battery pack.

[0137] 330a, when the first battery pack is transferring energy to the second battery pack, if the state parameter of the first battery pack is less than a third preset state value, the first battery pack is controlled to stop transferring energy to the second battery pack.

[0138] The third preset state value is less than or equal to the first preset state value.

[0139] The contents of steps 310 to 330a can be found in the descriptions of steps 210 to 230, and will not be repeated here.

[0140] 330b, when the first battery pack is transferring energy to the second battery pack, if the state parameter of the second battery pack is greater than the fourth preset state value, the first battery pack is controlled to stop transferring energy to the second battery pack.

[0141] Among them, the fourth preset state value is greater than or equal to the second preset state value.

[0142] As an example, the fourth preset state value can be equal to the second preset state value plus a numerical value.

[0143] In this embodiment, when the second battery pack is transferred to a state parameter greater than or equal to a fourth 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 provide energy for the self-discharge of the second battery pack, reducing the risk of over-discharge caused by self-discharge and improving the performance and lifespan of the second battery pack.

[0144] In some embodiments, the third preset state value is greater than the lower limit allowed by the state parameters of the first battery device.

[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 first battery pack to supply energy to the second 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 first battery pack to supply energy to the second 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 further 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 first battery pack to supply energy to the second 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] Figure 4 This is another schematic flowchart of the battery system energy management method provided in the embodiments of this application.

[0152] 410, Obtain the operating status and status parameters of the battery system.

[0153] The operating status of the battery system is used to indicate whether the first battery pack and / or the second battery pack are in a charging, discharging, or resting state.

[0154] 420A, when the second battery pack is in a static state for a first preset time, the state parameters of the first battery pack are greater than or equal to the first preset state value, and the state parameters of the second battery pack are less than or equal to the second preset state value, the first battery pack is controlled to transfer energy to the second battery pack.

[0155] 430A-1, when the first battery pack is transferring energy to the second battery pack, if the state parameter of the first battery pack is less than the third preset state value, the first battery pack is controlled to stop transferring energy to the second battery pack.

[0156] The third preset state value is less than or equal to the first preset state value.

[0157] 430A-2, when the first battery pack is transferring energy to the second battery pack, if the state parameter of the second battery pack is greater than the fourth preset state value, the first battery pack is controlled to stop transferring energy to the second battery pack.

[0158] The fourth preset state value is greater than or equal to the second preset state value.

[0159] The contents of steps 410, 420A to 430A can be found in the descriptions of steps 210 to 230 and 310 to 330, which will not be repeated here.

[0160] 420B, when the first battery pack is in a static state for a second preset time, the state parameter of the first battery pack is less than or equal to a fifth preset state value, and the state parameter of the second battery pack is greater than or equal to a sixth preset state value, controls the second battery pack to transfer energy to the first battery pack.

[0161] The first battery pack being in a static state for a second preset time means that the first battery pack is neither charged nor discharged for a period of time.

[0162] As an example, it can be determined whether the first battery pack is charging or discharging based on its charging and discharging parameters (such as charging and discharging current, voltage, or power). For instance, if the charging and discharging current of the first battery pack is less than or equal to a preset charging and discharging current and continues for a second preset time, the first battery pack can be considered to be in a static state for the second preset time.

[0163] In this embodiment, the second preset time can be long or short. For example, it can be several hours or several months.

[0164] As an example, the second preset time can be determined based on the fifth preset state value and the self-discharge capacity of the first battery pack. For instance, the larger the fifth preset state value and the smaller the self-discharge capacity of the first battery pack, the longer the second preset time can be set; conversely, the shorter the second preset time can be set.

[0165] If the state parameters of the first battery pack are less than or equal to the fifth preset state value, and the state parameters of the second battery pack are greater than or equal to the sixth preset state value, it indicates that the first battery pack needs to obtain energy, and the second battery pack has the ability to charge the first battery pack.

[0166] Therefore, when the first battery pack is in a static state for a long time, when the state parameter of the first battery pack is less than or equal to the fifth preset state value, and when the state parameter of the second battery pack is greater than or equal to the sixth preset state value, energy transfer from the second battery pack to the first battery pack can be controlled. This can reduce the risk of over-discharge caused by the continuous decrease in the state parameter of the first battery pack due to self-discharge when the first battery pack is in a static state for a long time, thereby improving the performance and service life of the first battery pack.

[0167] In some embodiments, energy transfer from the second battery pack to the first battery pack can be controlled when both the first and second battery packs are in a static state for a second preset time, the first battery pack is in a discharging state, the state parameter of the first battery pack is less than or equal to a fifth preset state value, and the state parameter of the second battery pack is greater than or equal to a sixth preset state value.

[0168] In some embodiments, when both the first battery pack and the second battery pack are in a static state for a second preset time, the state parameter of the first battery pack is less than or equal to a fifth preset state value, and the state parameter of the second battery pack is greater than or equal to a sixth preset state value, the second battery pack is controlled to transfer energy to the first battery pack.

[0169] The first battery pack and the second battery pack are both in a static state for a second preset time, which can mean that the first battery pack and the second battery pack have not been charged or discharged for a long time.

[0170] In this embodiment of the application, when both the first battery pack and the second battery pack are in a static state for a second preset time, and the state parameter of the first battery pack is less than or equal to a fifth preset state value and the state parameter of the second battery pack is greater than or equal to a sixth preset state value, the energy transfer from the second battery pack to the first battery pack can be controlled. This reduces the risk of over-discharge due to the continuous decrease in the state parameter of the first battery pack caused by its self-discharge when the first battery pack is in a static state for a long time, thereby improving the performance and service life of the first battery pack.

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

[0172] As an example, the fifth preset state value can be the lower limit of the state parameters of the first battery pack plus a fixed value. For example, if the lower limit of the SOC parameter in the first battery pack is 20%, the fifth preset state value can be 25%.

[0173] In this embodiment, energy can be replenished to the first battery pack when its state parameters are low and have not fallen below the lower limit of its state parameters. This can reduce the risk of over-discharge caused by self-discharge when the first battery pack is at rest and its state parameters are low, thereby improving 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, before step 420B, while the first battery pack is in a static state for a first preset time, a second demand discharge parameter of the second battery pack is obtained; a fifth preset state value is determined based on the second demand discharge parameter, and the fifth preset state value decreases as the second demand discharge parameter increases.

[0176] As an example, the second demand discharge parameter may include the current demand discharge parameter of the second battery pack, or it may include the future demand discharge parameter of the second battery pack.

[0177] For example, when the first battery pack is in a static state for a second preset time and the second battery pack is in a discharging state, the second required discharge parameter can be the current required discharge parameter of the second battery pack. As another example, when the first battery pack is in a static state for a second preset time and the second battery pack is also in a static state, the second required discharge parameter can be the future required discharge parameter of the second battery pack.

[0178] As an example, the second required discharge parameter may include at least one of discharge current, discharge voltage, or discharge power.

[0179] The method of determining the fifth preset state value based on the second demand discharge parameter is similar to the method of determining the second preset state value based on the first demand discharge parameter described above. For the sake of simplicity, this application will not elaborate further here.

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

[0181] As an example, the sixth preset state value can be the lower limit of the state parameters of the first battery pack plus a fixed value. For example, if the lower limit of the SOC parameter in the first battery pack is 20%, the sixth preset state value can be 25%.

[0182] In this embodiment of the application, by setting a sixth preset state value that is greater than the lower limit of the state parameters of the second battery pack, energy can be transferred to the first battery pack when the state parameters of the second battery pack are greater than the lower limit of its state parameters, that is, when the second battery pack has the ability to transfer energy to the outside, thereby reducing the risk of over-discharge of the second battery pack.

[0183] In some embodiments, the sixth preset state value can be a fixed value or a variable value.

[0184] In some embodiments, before step 420B, while the first battery pack is in a static state for a second preset time, the second required discharge parameter of the second battery pack can be obtained; based on the correspondence between the state parameter and the allowable discharge parameter of the second battery pack, the second state parameter corresponding to the allowable discharge parameter of the second battery pack is determined; and based on the second state parameter, the sixth preset state value is determined.

[0185] As an example, the second state parameter corresponding to the second battery pack's allowable discharge parameter meeting the second required discharge parameter can be determined based on the correspondence diagram (table or other form of correspondence) of the second battery pack's state parameters and allowable discharge parameters. Then, the sixth preset state value can be determined based on the value of the second state parameter. The method of confirming the sixth preset state value is similar to the method of determining the first preset state value based on the correspondence of state parameters and allowable discharge parameters described above. For the sake of simplicity, this application will not elaborate further here.

[0186] In this embodiment of the application, based on the correspondence between the state parameters and the allowable discharge parameters of the second battery pack, the state parameter value corresponding to the allowable discharge parameters of the second battery pack when they meet the second required discharge parameters is determined. Then, based on the corresponding state parameter value, a sixth preset state value is determined. Thus, based on the sixth preset state value, while the second battery pack is replenishing energy to the first 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.

[0187] In some embodiments, before step 420B, while the first battery pack is in a static state for a second preset time, a second demand discharge parameter of the second battery pack is obtained; a sixth preset state value is determined based on the second demand discharge parameter, and the sixth preset state value increases as the second demand discharge parameter increases.

[0188] 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.

[0189] The method of determining the sixth preset state value based on the second demand discharge parameter is similar to the method of determining the first preset state value based on the first demand discharge parameter described above. For the sake of simplicity, this application will not elaborate further here.

[0190] In this embodiment, the sixth preset state value can be flexibly adjusted according to the magnitude of the second required discharge parameter of the second battery pack. This allows for energy transfer from the second battery pack to the first battery pack only when the second required discharge parameter is relatively high, provided the state parameter is greater than or equal to a relatively large value; conversely, it allows for energy transfer from the second battery pack to the first battery pack only when the second required discharge parameter is relatively low, provided the state parameter is greater than or equal to a relatively small value. Thus, based on the sixth preset state value, the time 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 performance and lifespan of the battery system.

[0191] 430B-1, when the second battery pack is transferring energy to the first battery pack, if the state parameter of the first battery pack is greater than the seventh preset state value, the second battery pack is controlled to stop transferring energy to the first battery pack.

[0192] The seventh preset state value is greater than or equal to the fifth preset state value.

[0193] As an example, the seventh preset state value can be equal to the fifth preset state value plus a numerical value.

[0194] In this embodiment, when the first battery pack receives energy transfer to a state parameter greater than or equal to a seventh preset value, energy transfer from the second battery pack to the first battery pack can be stopped. This allows the energy transferred to the first battery pack to provide power for its self-discharge, reducing the risk of over-discharge due to self-discharge and improving the performance and lifespan of the first battery pack.

[0195] 430B-2, when the second battery pack is transferring energy to the first battery pack, if the state parameter of the second 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.

[0196] The eighth preset state value is less than or equal to the sixth preset state value.

[0197] In this embodiment of the application, when the state parameters of the second battery pack are less than the eighth set state value, the first battery pack is controlled to stop transferring energy to the second 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 when the first battery device transfers energy to the second battery pack.

[0198] In some embodiments, the seventh preset state value can be a fixed value or a variable value.

[0199] In some embodiments, during the process of controlling the second battery pack to provide energy to the first 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.

[0200] In some embodiments, during the process of controlling the second battery pack to provide energy to the first 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.

[0201] The method for determining the seventh 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.

[0202] In some embodiments, the eighth preset state value can be a fixed value or a variable value.

[0203] In some embodiments, during the process of controlling the second battery pack to provide energy to the first 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.

[0204] The method for determining the eighth 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.

[0205] 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.

[0206] The battery system energy management method of the present application embodiment has been described in detail above. The following will be combined with… Figure 5 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.

[0207] Figure 5 This is a schematic block diagram of the battery system provided in an embodiment of this application. Figure 5 The battery system 4000 includes some or all of the following components.

[0208] The battery system 4000 includes a first battery pack and a second battery pack.

[0209] The battery system 4000 includes an acquisition unit 4010 and a control unit 4020.

[0210] The acquisition unit 4010 is used to acquire the operating state and state parameters of the battery system, wherein the operating state of the battery system is used to indicate that the first battery pack and / or the second battery pack are in a charging, discharging, or resting state; the control unit 4020 is used to control the first battery pack to transfer energy to the second battery pack when the second battery pack is in a resting state for a first preset time, the state parameters of the first battery pack are greater than or equal to a first preset state value, and the state parameters of the second battery pack are less than or equal to a second preset state value; and when the first battery pack transfers energy to the second battery pack, if the state parameters of the first battery pack are less than a third preset state value, control the first battery pack to stop transferring energy to the second battery pack, wherein the third preset state value is less than or equal to the first preset state value.

[0211] In some embodiments, the control unit 4020 is specifically configured to control the first battery pack to transfer energy to the second battery pack when both the first battery pack and the second battery pack are in a static state for a first preset time, the state parameter of the first battery pack is greater than or equal to a first preset state value, and the state parameter of the second battery pack is less than or equal to a second preset state value.

[0212] In some embodiments, the acquisition unit 4010 is further configured to acquire the first required discharge parameter of the first battery pack when the second battery pack is in a static state for a first preset time; the control unit 4020 is further configured to determine the second state parameter corresponding to the first battery pack when the allowed discharge parameter satisfies the first required discharge parameter according to the correspondence between the state parameter and the allowed discharge parameter of the first battery pack; and determine the first preset state value according to the second state parameter.

[0213] In some embodiments, the acquisition unit 4010 is further configured to acquire a first demand discharge parameter of the first battery pack after a first preset time when the second battery pack is in a static state for a continuous first preset time; the control unit 4020 is further configured to determine a first preset state value based on the first demand discharge parameter, wherein the first preset state value increases as the first demand discharge parameter increases.

[0214] In some embodiments, the control unit 4020 is further configured to, when transferring energy from the first battery pack to the second battery pack, control the first battery pack to stop transferring energy to the second battery pack if the state parameter of the second battery pack is greater than a fourth preset state value, wherein the fourth preset state value is greater than or equal to the second preset state value.

[0215] In some embodiments, the control unit 4020 is further configured to control the second battery pack to transfer energy to the first battery pack when the first battery pack is in a static state for a second preset time, the state parameter of the first battery pack is less than or equal to a fifth preset state value, and the state parameter of the second battery pack is greater than or equal to a sixth preset state value.

[0216] In some embodiments, the control unit 4020 is specifically configured to control the second battery pack to transfer energy to the first battery pack when both the first battery pack and the second battery pack are in a static state for a second preset time, the state parameter of the first battery pack is less than or equal to a fifth preset state value, and the state parameter of the second battery pack is greater than or equal to a sixth preset state value.

[0217] In some embodiments, the acquisition unit 4010 is further configured to acquire the second required discharge parameter of the second battery pack when the first battery pack is in a static state for a second preset time; the control unit 4020 is further configured to determine the second state parameter corresponding to the second battery pack when the allowed discharge parameter satisfies the second required discharge parameter according to the correspondence between the state parameter and the allowed discharge parameter of the second battery pack; and determine the sixth preset state value according to the second state parameter.

[0218] In some embodiments, the acquisition unit 4010 is further configured to acquire the second demand discharge parameter of the second battery pack when the first battery pack is in a static state for a second preset time; the control unit 4020 is further configured to determine a sixth preset state value based on the second demand discharge parameter, wherein the sixth preset state value increases as the second demand discharge parameter increases.

[0219] In some embodiments, the control unit 4020 is further configured to, when the second battery pack is transferring energy to the first battery pack, control the second battery pack to stop transferring energy to the first battery pack if the state parameter of the first battery pack is greater than a seventh preset state value, wherein the seventh preset state value is greater than or equal to a fifth preset state value.

[0220] In some embodiments, the control unit 4020 is further configured to, when transferring energy from the second battery pack to the first battery pack, control the first battery pack to stop transferring energy to the second battery pack if the state parameter of the second battery pack is less than an eighth preset state value, wherein the eighth preset state value is less than or equal to a sixth preset state value.

[0221] 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 4 For the sake of brevity, the corresponding processes in each method will not be elaborated here.

[0222] Figure 6A schematic block diagram of a battery management system 5000 according to an embodiment of this application is shown. Figure 6 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.

[0223] The memory 5020 can be a separate device independent of the processor 5010, or it can be integrated into the processor 5010.

[0224] Optionally, such as Figure 6 As shown, the battery management system 5000 may also include a transceiver 5030, and the processor 5010 can control the transceiver 5030 to communicate with other devices. Specifically, it can send information or data to other devices, or receive information or data sent by other devices.

[0225] 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.

[0226] 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.

[0227] like Figure 7 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.

[0228] 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.

[0229] For details on the 4000 battery system, please refer to the above text. Figure 5 For the sake of brevity, the relevant descriptions in the original document will not be repeated here.

[0230] This application also provides a computer-readable storage medium for storing computer programs.

[0231] When the computer program is run on a computer, it causes the computer to perform the various methods of the embodiments of this application.

[0232] This application also provides a computer program product, including computer program instructions.

[0233] 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.

[0234] This application also provides a computer program.

[0235] When the computer program is run on a computer, it causes the computer to perform the various methods of the embodiments of this application.

[0236] 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.

[0237] 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.

[0238] 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.

[0239] 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.

[0240] 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.

[0241] 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.

[0242] 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 of the battery system is used to indicate that the first battery pack and / or the second battery pack are in a charging, discharging or resting state; When the second battery pack is in a static state for a first preset time, the state parameter of the first battery pack is greater than or equal to the first preset state value, and the state parameter of the second battery pack is less than or equal to the second preset state value, the first battery pack is controlled to transfer energy to the second battery pack. When the first battery pack is transferring energy to the second battery pack, if the state parameter of the first battery pack is less than a third preset state value, the first battery pack is controlled to stop transferring energy to the second battery pack. The third preset state value is less than or equal to the first preset state value.

2. The method according to claim 1, characterized in that, The step of controlling the first battery pack to transfer energy to the second battery pack when the second battery pack is in a static state for a first preset time, the state parameter of the first battery pack is greater than or equal to a first preset state value, and the state parameter of the second battery pack is less than or equal to a second preset state value includes: When both the first battery pack and the second battery pack are in a static state for the first preset time, the state parameter of the first battery pack is greater than or equal to the first preset state value, and the state parameter of the second battery pack is less than or equal to the second preset state value, the first battery pack is controlled to transfer energy to the second battery pack.

3. The method according to claim 1, characterized in that, Before controlling the energy transfer from the first battery pack to the second battery pack, the method further includes: When the second battery pack is in a static state and continues for the first preset time, the first required discharge parameters of the first battery pack are obtained. Based on the correspondence between the state parameters and the allowable discharge parameters of the first battery pack, determine the first state parameter corresponding to the allowable discharge parameters of the first battery pack when they meet the first required discharge parameters. The first preset state value is determined based on the first state parameter.

4. The method according to claim 1, characterized in that, Before controlling the energy transfer from the first battery pack to the second battery pack, the method further includes: When the second battery pack is in a static state and continues for the first preset time, the first required discharge parameters of the first battery pack are obtained. The first preset state value is determined based on the first required discharge parameter, and the first preset state value increases as the first required discharge parameter increases.

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

6. The method according to any one of claims 1 to 5, characterized in that, The method further includes: When the first battery pack is in a static state for a second preset time, the state parameter of the first battery pack is less than or equal to a fifth preset state value, and the state parameter of the second battery pack is greater than or equal to a sixth preset state value, the second battery pack is controlled to transfer energy to the first battery pack.

7. The method according to claim 6, characterized in that, The step of controlling the second battery pack to transfer energy to the first battery pack when the first battery pack is in a static state for a second preset time, the state parameter of the first battery pack is less than or equal to a fifth preset state value, and the state parameter of the second battery pack is greater than or equal to a sixth preset state value includes: When both the first battery pack and the second battery pack are in a static state for the second preset time, the state parameter of the first battery pack is less than or equal to the fifth preset state value, and the state parameter of the second battery pack is greater than or equal to the sixth preset state value, the second battery pack is controlled to transfer energy to the first battery pack.

8. The method according to claim 6, characterized in that, Before controlling the second battery pack to transfer energy to the first battery pack, the method further includes: When the first battery pack is in a static state and continues for the second preset time, the second required discharge parameters of the second battery pack are obtained. Based on the correspondence between the state parameters and the 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.

9. The method according to claim 6, characterized in that, Before controlling the second battery pack to transfer energy to the first battery pack, the method further includes: When the first battery pack is in a static state and continues for the second preset time, the second required discharge parameters of the second battery pack are obtained. The sixth preset state value is determined based on the second required discharge parameter, and the sixth preset state value increases as the second required discharge parameter increases.

10. The method according to claim 6, characterized in that, The method further includes: When the second battery pack is transferring energy to the first battery pack, if the state parameter of the first battery pack is greater than a seventh preset state value, the second battery pack is controlled to stop transferring energy to the first battery pack. The seventh preset state value is greater than or equal to a fifth preset state value.

11. The method according to claim 6, characterized in that, The method further includes: When the second battery pack is transferring energy to the first battery pack, if the state parameter of the second 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. The eighth preset state value is less than or equal to the sixth preset state value.

12. A battery system, characterized in that, The battery system includes a first battery pack and a second battery pack, and the battery system further includes: The acquisition unit is used to acquire the operating state and state parameters of the battery system, wherein the operating state of the battery system includes the first battery pack and the second battery pack being in a charging, discharging or resting state; The control unit is configured to control energy transfer from the first battery pack to the second battery pack when the second battery pack is in a static state for a first preset time, the state parameter of the first battery pack is greater than or equal to a first preset state value, and the state parameter of the second battery pack is less than or equal to a second preset state value; and When the first battery pack is transferring energy to the second battery pack, if the state parameter of the first battery pack is less than a third preset state value, the first battery pack is controlled to stop transferring energy to the second battery pack. The third preset state value is less than or equal to the first preset state value.

13. 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 11 according to the instructions.

14. An electrical appliance, characterized in that, The electrical equipment includes: First load; Second load; And the battery system as claimed in claim 12, 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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