Monitoring method of energy storage device, power utilization device and energy storage device

Abstract

The invention discloses a monitoring method of an energy storage device, a power utilization device and the energy storage device, the energy storage device comprises a shell, an energy storage unit group and a temperature and humidity sensor, the energy storage unit group and the temperature and humidity sensor are arranged in the shell, and the monitoring method comprises the step of detecting the real-time temperature and the real-time humidity in the shell through the temperature and humidity sensor. And determining the dew point temperature matched with the real-time humidity, and comparing the real-time temperature with the dew point temperature to obtain a comparison result. And executing a processing strategy matched with the comparison result. By means of the mode, the internal environment of the energy storage device can be monitored in real time, corresponding processing can be conducted on the internal environment of the energy storage device, and therefore operation and use of the energy storage device can be more effectively maintained in the use process of the energy storage device.

Description

Energy storage device monitoring method, power consumption device, and energy storage device

[0001] This application claims priority to Chinese patent application No. 2024200148953, filed on January 3, 2024, entitled “Monitoring method for energy storage device, power consumption device and energy storage device,” the entire contents of which are incorporated herein by reference.

Technical field

[0002] The present application relates to the field of battery technology, and in particular to a monitoring method for an energy storage device, an electrical device, and an energy storage device. [Background Technology]

[0003] A battery is a device that converts chemical energy into electrical energy. It contains a cup, tank, or other container, or a portion of a composite container, that contains an electrolyte solution and metal electrodes to generate an electric current. With the advancement of technology, batteries, with their advantages of portability, ease of charge and discharge, and long-term stable power supply, have become widely used in automobiles, home appliances, aerospace, and other fields.

[0004] In the structure of energy storage devices using battery cells, conductive elements such as modules, copper busbars, and distribution boxes are usually provided. However, the internal environment of the energy storage device will change during the operation and use of the energy storage device, which will affect the various conductive elements, and in turn affect the operation of the internal conductive elements, and even directly affect the operation and use of the energy storage device.

[0005] [Summary of the invention]

[0006] In view of the above problems, the present application provides a monitoring method for an energy storage device, an electrical device, and an energy storage device, which can monitor the environment inside the energy storage device in real time and can promptly make corresponding processing corresponding to the environment inside the energy storage device, thereby more effectively maintaining the operation and use of the energy storage device during the use of the energy storage device.

[0007] In a first aspect, the present application provides a method for monitoring an energy storage device, wherein the energy storage device includes a housing, an energy storage unit group, and a temperature and humidity sensor, wherein the energy storage unit group and the temperature and humidity sensor are disposed inside the housing. The method includes:

[0008] The real-time temperature and humidity inside the housing are detected by the temperature and humidity sensor.

[0009] A dew point temperature that matches the real-time humidity is determined, and the real-time temperature is compared with the dew point temperature to obtain a comparison result.

[0010] A processing strategy matching the comparison result is executed.

[0011] In the technical solution of the embodiments of the present application, a temperature and humidity sensor is provided within the energy storage device. The real-time humidity and temperature detected by the temperature and humidity sensor are used to calculate the dew point temperature corresponding to the internal environment of the energy storage device. The real-time temperature is further compared with the dew point temperature to obtain a comparison result that can reflect the internal environment of the energy storage device, and corresponding processing is performed in response to the current real-time environment within the energy storage device. Such a configuration not only monitors the internal environment of the energy storage device in real time, but also performs corresponding processing in real time based on the current environment within the energy storage device. During the use of the energy storage device, the conductive elements within the energy storage device are less susceptible to the influence of the internal environment, thereby more effectively maintaining the operation and use of the energy storage device.

[0012] In some embodiments, determining the dew point temperature that matches the real-time humidity includes: determining the dew point temperature that matches the real-time humidity in a psychrometric chart.

[0013] By substituting the real-time humidity into the psychrometric diagram to obtain the dew point temperature, the process of obtaining the dew point temperature can be simplified, making the monitoring method of the energy storage device more efficient. In addition, using the psychrometric diagram to obtain the dew point temperature can make the processing results more accurate and can more effectively protect the energy storage device.

[0014] In some embodiments, executing a processing strategy that matches the comparison result includes: if the comparison result is that the real-time temperature is less than or equal to the dew point temperature, outputting a warning message indicating that condensation may occur in the housing.

[0015] By outputting a warning message indicating possible condensation inside the shell when the real-time temperature is less than or equal to the dew point temperature, a warning of condensation inside the shell of the energy storage device can be issued in a timely manner, and dangerous conditions inside the shell of the energy storage device can be fed back in a timely manner to facilitate further maintenance of the energy storage device.

[0016] In some embodiments, the energy storage device includes a liquid cooling device, which is disposed outside the housing and is used to cool the housing and the energy storage unit group by circulating a cooling liquid.

[0017] Executing a processing strategy that matches the comparison result includes: if the comparison result is that the real-time temperature is less than or equal to the dew point temperature, controlling the liquid cooling device to adjust the temperature and / or circulation speed of the cooling liquid, thereby making the real-time temperature greater than the dew point temperature.

[0018] By providing a liquid cooling device in the energy storage device and, after determining that the real-time temperature is less than or equal to the dew point temperature, being able to directly use the liquid cooling device to adjust the real-time temperature inside the energy storage device, the real-time temperature can be quickly made greater than the dew point temperature, so that the internal environment of the energy storage device is quickly free from condensation conditions, thereby achieving precise control of the internal environment of the energy storage device. It can also timely reduce the formation of condensation water accumulation and excessive internal humidity inside the energy storage device, thereby reducing the occurrence of conductive elements inside the energy storage device being in a condensation environment for a long time, thereby more effectively protecting the energy storage device.

[0019] In some embodiments, controlling the liquid cooling device to adjust the cooling temperature and / or circulation speed of the cooling liquid includes:

[0020] Calculate the temperature difference between the dew point temperature and the real-time temperature.

[0021] The liquid cooling device is controlled to adjust the temperature and / or circulation speed of the cooling liquid according to the corresponding relationship between the temperature difference and the temperature and / or circulation speed of the cooling liquid.

[0022] By utilizing the temperature difference between the dew point temperature and the real-time temperature to adjust the temperature and / or circulation speed of the cooling liquid in the liquid cooling device, the liquid cooling device can more accurately and efficiently control the internal environment of the energy storage device. It can quickly raise the real-time temperature inside the energy storage device to above the dew point temperature, thereby reducing the formation of condensation water accumulation and excessive internal humidity inside the energy storage device, thereby more effectively maintaining the operation and use of the energy storage device.

[0023] In some embodiments, the energy storage device includes a liquid cooling device, which is arranged outside the shell. The liquid cooling device includes multiple parallel liquid cooling pipelines, and each liquid cooling pipeline is used to cool the shell and the energy storage unit group through the circulation of cooling liquid when it is turned on.

[0024] Executing a processing strategy that matches the comparison result includes: if the comparison result is that the real-time temperature is less than or equal to the dew point temperature, controlling the liquid cooling device to control at least one liquid cooling pipeline to open so that the real-time temperature is greater than the dew point temperature.

[0025] By setting up multiple parallel liquid cooling pipelines, the contact area between the liquid cooling device and the shell can be increased, thereby improving the cooling speed of the liquid cooling device, and then the real-time temperature inside the shell can be adjusted more quickly, which can more effectively maintain the stability of the internal environment of the energy storage device shell. By setting up a control liquid cooling device to control at least one liquid cooling pipeline to open to cool the shell and the energy storage unit group, the temperature adjustment speed of the liquid cooling device can be enhanced, making the control process of the liquid cooling device more flexible.

[0026] In some embodiments, controlling the liquid cooling device to control the flow of cooling liquid through at least one liquid cooling pipe includes calculating a temperature difference between a dew point temperature and a real-time temperature, determining a number of liquid cooling pipes to be opened that matches the temperature difference, and controlling the liquid cooling device to open the number of liquid cooling pipes.

[0027] By using the temperature difference between the dew point temperature and the real-time temperature to determine the number of liquid cooling pipes to be opened, the process of adjusting the real-time temperature of the liquid cooling device can be made more efficient, which can achieve efficient temperature control while saving energy consumption.

[0028] In some embodiments, determining the number of liquid cooling lines to be opened that match the temperature difference and controlling the liquid cooling device to open the number of liquid cooling lines includes: determining the number of liquid cooling lines to be opened that match the temperature difference and determining the temperature and / or circulation rate of the cooling liquid in the liquid cooling lines to be opened. Controlling the liquid cooling device to open the number of liquid cooling lines and controlling the corresponding liquid cooling lines to circulate cooling according to the determined temperature and / or circulation rate of the cooling liquid.

[0029] By using the number of open liquid cooling lines to calculate and determine the temperature and / or circulation speed of the cooling liquid in the liquid cooling lines, the temperature control process of the energy storage device can be standardized and more efficient. It can also control energy consumption and reduce costs while achieving high temperature control inside the energy storage device, without causing waste of resources.

[0030] In some embodiments, controlling the liquid cooling device to open at least one liquid cooling pipeline includes:

[0031] The liquid cooling control device controls the opening of at least one liquid cooling pipeline and adjusts the temperature and / or circulation speed of the cooling liquid in the corresponding liquid cooling pipeline.

[0032] By controlling at least one liquid cooling pipeline to open and timely adjusting the temperature and / or circulation speed of the cooling liquid inside the liquid cooling pipeline to achieve a real-time temperature greater than the dew point temperature, the temperature control process inside the Zhuneng energy storage device using the liquid cooling device can be faster and more convenient, thereby reducing the accumulation of condensed water inside the energy storage device and the phenomenon of excessive internal humidity.

[0033] In some embodiments, detecting the real-time temperature and real-time humidity in the housing by using a temperature and humidity sensor includes:

[0034] During the process of outputting electric energy or charging, the real-time temperature and humidity inside the housing are detected by the temperature and humidity sensors.

[0035] By detecting the real-time temperature and humidity inside the shell while the energy storage device is outputting electrical energy or charging, the stability of the internal environment of the shell can be more effectively maintained during use of the energy storage device.

[0036] In some embodiments, the energy storage device includes a liquid cooling device, which is disposed outside the housing and is used to cool the housing and the energy storage unit group by circulating a cooling liquid.

[0037] After determining that the real-time temperature is less than or equal to the dew point temperature, the method includes: if the comparison result is that the real-time temperature is greater than the dew point temperature, controlling the liquid cooling device to turn on the insulation mode to control the temperature and / or circulation speed of the cooling liquid according to the insulation mode, so that the difference between the real-time temperature and the dew point temperature is less than the preset temperature threshold.

[0038] After determining that the real-time temperature inside the shell is greater than the dew point temperature, the insulation mode is turned on to maintain the stability of the internal environment of the energy storage device as much as possible, thereby making it less likely for condensation or excessive humidity to occur inside the shell, thereby more effectively preventing condensation from occurring inside the shell of the energy storage device.

[0039] In a second aspect, the present application provides an electrical device comprising an energy storage device and a battery management system. The energy storage device comprises a housing, an energy storage unit group, and a temperature and humidity sensor, wherein the energy storage unit group and the temperature and humidity sensor are disposed within the housing. The battery management system is electrically connected to the temperature and humidity sensor to implement the energy storage device monitoring method described in the above embodiment.

[0040] In a third aspect, the present application provides an energy storage device comprising a housing, an energy storage unit group, a temperature and humidity sensor, and a processor. The energy storage unit group is disposed within the housing. The temperature and humidity sensor is disposed within the housing. The processor is disposed on the housing and electrically connected to the temperature and humidity sensor, and is configured to execute the energy storage device monitoring method described in the above embodiment.

[0041] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below.

Brief Description of the Drawings

[0042] Various other advantages and benefits will become apparent to those skilled in the art upon reading the detailed description of the preferred embodiment below. The accompanying drawings are for illustration purposes only and are not to be considered as limiting the present application. The same reference numerals are used throughout the drawings to represent the same components. In the drawings:

[0043] FIG1 is a schematic structural diagram of a vehicle according to some embodiments of the present application;

[0044] FIG2 is a schematic diagram of the exploded structure of a battery according to some embodiments of the present application;

[0045] FIG3 is a schematic diagram of the exploded structure of a battery cell according to some embodiments of the present application;

[0046] FIG4 is a schematic block diagram of the structural relationship of energy storage devices according to some embodiments of the present application;

[0047] FIG5 is a schematic flow chart of steps of a method for monitoring an energy storage device according to some embodiments of the present application;

[0048] FIG6 is a schematic block diagram of the structural relationship of an electrical device according to some embodiments of the present application;

[0049] FIG7 is a schematic flow chart of steps of a method for monitoring an energy storage device according to other embodiments of the present application.

[0050] The accompanying drawings in the specific implementation manner are as follows:

[0051] Vehicle 1000a;

[0052] Battery 100, controller 200, motor 300;

[0053] Box 10a, first part 11a, second part 12a;

[0054] Battery cell 1a, outer shell 100a, end cap 120a, housing 110a, electrode terminal 200a, opening 111a, electrode assembly 500a, and tab 501a;

[0055] Energy storage device 10, housing 110, energy storage unit group 120, temperature and humidity sensor 130, processor 140, liquid cooling device 150, liquid cooling pipeline 151;

[0056] Power-consuming device 2 , battery management system 20 .

[0057] [Specific implementation method]

[0058] The following embodiments of the technical solution of the present application will be described in detail with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application and are therefore only examples and are not intended to limit the scope of protection of the present application.

[0059] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned figure descriptions are intended to cover non-exclusive inclusions.

[0060] In the description of the embodiments of this application, the technical terms "first" and "second" are used only to distinguish different objects and should not be understood to indicate or imply relative importance or implicitly specify the quantity, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, the meaning of "plurality" is more than two, unless otherwise clearly and specifically defined.

[0061] References herein to "embodiments" mean that a particular feature, structure, or characteristic described in connection with the embodiments may be included in at least one embodiment of the present application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0062] In the description of the embodiments of this application, the term "and / or" is simply a description of the association relationship between associated objects, indicating that three relationships can exist. For example, A and / or B can represent the following three situations: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this document generally indicates that the associated objects are in an "or" relationship.

[0063] In the description of the embodiments of the present application, the term "multiple" refers to more than two (including two). Similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0064] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the embodiments of the present application.

[0065] In the description of the embodiments of the present application, unless otherwise expressly specified or limited, technical terms such as "installed," "connected," "connected," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; internal connections between two components or interactions between two components. Those skilled in the art can understand the specific meanings of the above terms in the embodiments of the present application based on specific circumstances.

[0066] With the advancement of battery technology, battery cells are being used in a growing number of fields and are gradually replacing traditional fossil fuels in the automotive powertrain sector. Battery cells store chemical energy and controllably convert it into electrical energy. In recyclable battery cells, after discharge, the active material can be activated by recharging for continued use.

[0067] Energy storage devices such as battery cells typically include conductive components such as modules, copper busbars, and distribution boxes. However, the internal environment of the energy storage device can affect these components, which in turn can affect their operation and even directly impact the device's operation and use. For example, a water cooling system is often included in an energy storage device to control the temperature of the entire device. However, this system can easily generate water mist or condensation when cooling the device. This can significantly reduce electrical clearances and creepage distances, directly impacting the conductivity of internal conductive components and, consequently, the device's operation and use.

[0068] In order to maintain the internal stability of the energy storage device, temperature, humidity and other sensors can be installed inside the energy storage device to monitor the internal temperature and humidity of the energy storage device in real time. When the temperature and humidity inside the energy storage device change and reach the conditions that affect the conductive elements in the energy storage device, the internal environment of the energy storage device is promptly processed to remove the conductive elements in the energy storage device from the dangerous environment, thereby maintaining the internal stability of the energy storage device.

[0069] Based on the above considerations, the present application provides a monitoring method for an energy storage device, an electrical device, and an energy storage device. By setting a temperature and humidity sensor inside the energy storage device, and using the real-time humidity and real-time temperature detected by the temperature and humidity sensor, the dew point temperature corresponding to the internal environment of the energy storage device is calculated, and the real-time temperature is further compared with the dew point temperature to obtain a comparison result that can reflect the internal environment of the energy storage device, and then make targeted corresponding processing corresponding to the current real-time environment inside the energy storage device. With such a setting, not only can the internal environment of the energy storage device be monitored in real time, but corresponding processing can also be made in real time for the current environment inside the energy storage device. During the use of the energy storage device, the conductive elements inside the energy storage device can be less susceptible to the influence of its internal environment, and the operation and use of the energy storage device can be more effectively maintained.

[0070] The energy storage device disclosed in the embodiments of the present application can be used in electrical devices that use batteries as power sources or in various energy storage systems that use batteries as energy storage elements.

[0071] Electrical devices may include, but are not limited to, mobile phones, tablets, laptops, electric toys, electric tools, battery-powered vehicles, electric cars, ships, spacecraft, etc. Electric toys may include fixed or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc. Spacecraft may include airplanes, rockets, space shuttles, and spacecraft, etc.

[0072] For the convenience of description, the following embodiments are described by taking a vehicle 1000a as an example of an electrical device according to an embodiment of the present application.

[0073] Referring to Figure 1, vehicle 1000a can be a fuel vehicle, a gas vehicle or a new energy vehicle. The new energy vehicle can be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle, etc. A battery 100 is provided inside vehicle 1000a. Battery 100 can be provided at the bottom, head or tail of vehicle 1000a. Battery 100 can be used to power vehicle 1000a. For example, battery 100 can serve as an operating power source for vehicle 1000a. Vehicle 1000a can also include a controller 200 and a motor 300. Controller 200 is used to control battery 100 to power motor 300, for example, to meet the power requirements for starting, navigating and driving vehicle 1000a.

[0074] In some embodiments of the present application, the battery 100 can serve not only as an operating power source for the vehicle 1000a, but also as a driving power source for the vehicle 1000a, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000a.

[0075] In some embodiments, the battery 100 may be an energy storage device, including an energy storage container, an energy storage cabinet, and the like.

[0076] The battery 100 mentioned in the embodiments of the present application refers to a single physical module including one or more battery cells 1 a to provide higher voltage and capacity.

[0077] In the embodiment of the present application, the battery cell 1a may be a secondary battery, which refers to a battery cell that can be recharged to activate the active material after discharge and continue to be used. Each battery cell 1a may also be a primary battery.

[0078] Battery cells 1a include, but are not limited to, lithium-ion batteries, sodium-ion batteries, sodium-lithium-ion batteries, lithium metal batteries, sodium metal batteries, lithium-sulfur batteries, magnesium-ion batteries, nickel-metal hydride batteries, nickel-cadmium batteries, lead-acid batteries, etc. Battery cells 1a may be cylindrical, flat, rectangular, or in other shapes.

[0079] In some embodiments, the battery 100 may be a battery module. When there are multiple battery cells 1 a , the multiple battery cells 1 a are arranged and fixed to form a battery module.

[0080] In some embodiments, referring to FIG. 2 , the battery 100 may be a battery pack, which includes a housing 10 a and battery cells 1 a . The battery cells 1 a or battery modules are housed in the housing 10 a .

[0081] In some embodiments, the box 10a can serve as part of the chassis structure of the vehicle 1000a. For example, a portion of the box 10a can become at least a portion of the floor of the vehicle 1000a, or a portion of the box 10a can become at least a portion of the cross member and longitudinal member of the vehicle 1000a.

[0082] Referring to Figure 2 , the battery 100 includes a housing 10a and a battery cell 1a, with the battery cell 1a being housed within the housing 10a. The housing 10a is configured to provide a storage space for the battery cell 1a, and the housing 10a can have a variety of structures. In some embodiments, the housing 10a can include a first portion 11a and a second portion 12a, which overlap with each other, and together define a storage space for accommodating the battery cell 1a. The second portion 12a can be a hollow structure with one end open, and the first portion 11a can be a plate-like structure, with the first portion 11a overlapping the open side of the second portion 12a, so that the first portion 11a and the second portion 12a together define a storage space. The first portion 11a and the second portion 12a can also be hollow structures each with one end open, with the open side of the first portion 11a overlapping the open side of the second portion 12a. Of course, the box body 10a formed by the first part 11a and the second part 12a can be in various shapes, such as a cylinder, a cuboid, etc.

[0083] In the battery 100, there may be multiple battery cells 1a, which may be connected in series, in parallel, or in a hybrid configuration. A hybrid configuration refers to a combination of series and parallel connections within the battery cells 1a. Multiple battery cells 1a may be directly connected in series, in parallel, or in a hybrid configuration, and then the entire structure formed by the multiple battery cells 1a is housed within the housing 10a. Alternatively, the battery 100 may comprise multiple battery cells 1a that are first connected in series, in parallel, or in a hybrid configuration to form a battery module, which is then further connected in series, in parallel, or in a hybrid configuration to form a single structure housed within the housing 10a. The battery 100 may also include other structures, such as a busbar assembly for electrically connecting the multiple battery cells 1a.

[0084] Referring to Figure 3 , a battery cell 1a is the smallest unit of a battery. In this embodiment, a cylindrical battery cell 1a is used as an example. As shown in Figure 3 , the battery cell 1a includes a housing 100a , an electrode assembly 500a , and other functional components.

[0085] In some embodiments, the housing 100a is used to encapsulate the electrode assembly 500a and electrolyte components. The housing 100a can be a steel shell, an aluminum shell, a plastic shell (such as polypropylene), a composite metal shell (such as a copper-aluminum composite shell), or an aluminum-plastic film.

[0086] The outer shell 100a may include an end cap 120a and a shell 110a. The end cap 120a refers to a component that covers the opening of the shell 110a to isolate the internal environment of the battery cell 1a from the external environment. Without limitation, the shape of the end cap 120a can be adapted to the shape of the shell 110a to match the shell 110a. Optionally, the end cap 120a can be made of a material with a certain hardness and strength (such as an aluminum alloy). In this way, the end cap 120a is less likely to deform when squeezed or collided, allowing the battery cell 1a to have higher structural strength and improved safety performance. Functional components such as electrode terminals 200a can be provided on the end cap 120a. The electrode terminal 200a can be used to electrically connect to the electrode assembly 500a for outputting or inputting electrical energy into the battery cell 1a. In some embodiments, the end cap 120a can also be provided with a pressure relief mechanism for releasing internal pressure when the internal pressure or temperature of the battery cell 1a reaches a threshold. The end cap 120a can also be made of a variety of materials, including but not limited to copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc. In some embodiments, an insulating component can be disposed inside the end cap 120a to isolate the electrical connection components within the housing 110a from the end cap 120a to reduce the risk of short circuits. Exemplary materials include plastic, rubber, etc.

[0087] The housing 110a is a component that cooperates with the end cap 120a to form the internal environment of the battery cell 1a. This internal environment can be used to accommodate the electrode assembly 500a, electrolyte, and other components. The housing 110a and end cap 120a can be separate components. An opening 111a can be provided on the housing 110a, and the end cap 120a is placed over the opening 111a to form the internal environment of the battery cell 1a. Alternatively, the end cap 120a and the housing 110a can be integrated. Specifically, the end cap 120a and the housing 110a can form a common connection surface before other components are inserted into the housing. When the interior of the housing 110a needs to be enclosed, the end cap 120a is placed over the housing 110a. The housing 110a can have a variety of shapes and sizes, such as a rectangular parallelepiped, a cylindrical shape, a hexagonal prism, etc. Specifically, the shape of the housing 110a can be determined based on the specific shape and size of the electrode assembly 500a. The housing 110a may be made of various materials, including but not limited to copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc.

[0088] The electrode assembly 500a is a component where electrochemical reactions occur in the battery cell 1a. One or more electrode assemblies 500a may be contained in the housing 110a.

[0089] In some embodiments, the electrode assembly 500a includes a positive electrode, a negative electrode, and a separator. During the charge and discharge process of the battery cell, active ions (e.g., lithium ions) are intercalated and released between the positive and negative electrodes. The separator is positioned between the positive and negative electrodes to prevent short circuits between the positive and negative electrodes while allowing the active ions to pass through.

[0090] In some embodiments, the positive electrode may be a positive electrode sheet, which may include a positive electrode current collector and a positive electrode active material disposed on at least one surface of the positive electrode current collector.

[0091] As an example, the positive electrode current collector has two surfaces facing each other in its thickness direction, and the positive electrode active material is provided on either or both of the two facing surfaces of the positive electrode current collector.

[0092] As an example, the positive electrode current collector may be a metal foil or a composite current collector. For example, as the metal foil, aluminum or stainless steel with a silver surface treatment, stainless steel, copper, aluminum, nickel, carbon electrode, carbon, nickel or titanium, etc. may be used. The composite current collector may include a polymer material base layer and a metal layer. The composite current collector may be formed by forming a metal material (aluminum, aluminum alloy, nickel, nickel alloy, titanium, titanium alloy, silver and silver alloy, etc.) on a polymer material substrate (such as a substrate of polypropylene, polyethylene terephthalate, polybutylene terephthalate, polystyrene, polyethylene, etc.).

[0093] As an example, the positive electrode active material may include at least one of the following materials: lithium-containing phosphates, lithium transition metal oxides and their respective modified compounds. However, the present application is not limited to these materials, and other traditional materials that can be used as battery positive electrode active materials may also be used. These positive electrode active materials may be used alone or in combination of two or more. Among them, examples of lithium-containing phosphates may include but are not limited to at least one of lithium iron phosphate (such as LiFePO4 (also referred to as LFP)), a composite material of lithium iron phosphate and carbon, lithium manganese phosphate (such as LiMnPO4), a composite material of lithium manganese phosphate and carbon, lithium iron manganese phosphate, and a composite material of lithium iron manganese phosphate and carbon. Examples of lithium transition metal oxides may include but are not limited to lithium cobalt oxide (such as LiCoO2), lithium nickel oxide (such as LiNiO2), lithium manganese oxide (such as LiMnO2, LiMn2O4), lithium nickel cobalt oxide, lithium manganese cobalt oxide, lithium nickel manganese oxide, lithium nickel cobalt manganese oxide (such as LiNi 1 / 3 Co 1 / 3 Mn 1 / 3 O2 (also referred to as NCM333), LiNi 0.5 Co0.2Mn 0.3 O2 (also referred to as NCM523), LiNi 0.5 Co 0.25 Mn 0.25 O2 (also referred to as NCM211), LiNi 0.6 Co 0.2 Mn 0.2 O2 (also referred to as NCM622), LiNi 0.8 Co 0.1 Mn 0.1 O2 (also referred to as NCM811), lithium nickel cobalt aluminum oxide (such as LiNi 0.85 Co 0.15 Al 0.05 O2) and at least one of its modified compounds, etc.

[0094] In some embodiments, the negative electrode may be a negative electrode sheet, and the negative electrode sheet may include a negative electrode current collector.

[0095] As an example, the negative electrode current collector can be a metal foil, a metal foam, or a composite current collector. For example, as the metal foil, aluminum or stainless steel with a silver surface treatment, stainless steel, copper, aluminum, nickel, carbon electrode, carbon, nickel, or titanium can be used. The metal foam can be nickel foam, copper foam, aluminum foam, alloy foam, or carbon foam. The composite current collector can include a polymer material base layer and a metal layer. The composite current collector can be formed by forming a metal material (copper, copper alloy, nickel, nickel alloy, titanium, titanium alloy, silver, and silver alloy, etc.) on a polymer material substrate (such as a substrate of polypropylene, polyethylene terephthalate, polybutylene terephthalate, polystyrene, polyethylene, etc.).

[0096] As an example, the negative electrode sheet may include a negative electrode current collector and a negative electrode active material disposed on at least one surface of the negative electrode current collector.

[0097] As an example, the negative electrode current collector has two surfaces facing each other in its thickness direction, and the negative electrode active material is provided on either or both of the two facing surfaces of the negative electrode current collector.

[0098] As an example, the negative electrode active material may adopt the negative electrode active material for battery cells that is well known in the art. As an example, the negative electrode active material may include at least one of the following materials: artificial graphite, natural graphite, soft carbon, hard carbon, silicon-based materials, tin-based materials, lithium titanate, etc. The silicon-based material may be selected from at least one of elemental silicon, silicon oxide compounds, silicon-carbon composites, silicon-nitrogen composites, and silicon alloys. The tin-based material may be selected from at least one of elemental tin, tin oxide compounds, and tin alloys. However, the present application is not limited to these materials, and other traditional materials that can be used as negative electrode active materials for batteries may also be used. These negative electrode active materials may be used alone or in combination of two or more.

[0099] In some embodiments, the material of the positive electrode current collector may be aluminum, and the material of the negative electrode current collector may be copper.

[0100] In some embodiments, the electrode assembly 500a further includes a separator disposed between the positive electrode and the negative electrode.

[0101] In some embodiments, the separator is a separator. The present application has no particular limitation on the type of separator, and any known separator with a porous structure having good chemical and mechanical stability can be selected.

[0102] As an example, the primary material of the separator can be selected from at least one of glass fiber, non-woven fabric, polyethylene, polypropylene, polyvinylidene fluoride, and ceramic. The separator can be a single-layer film or a multi-layer composite film, without particular limitation. When the separator is a multi-layer composite film, the materials of each layer can be the same or different, without particular limitation. The separator can be a separate component positioned between the positive and negative electrodes, or it can be attached to the surfaces of the positive and negative electrodes.

[0103] In some embodiments, the separator is a solid electrolyte, which is disposed between the positive electrode and the negative electrode and serves to transport ions and isolate the positive and negative electrodes.

[0104] In some embodiments, the battery cell also includes an electrolyte, which acts as a conductor of ions between the positive and negative electrodes. This application does not specifically limit the type of electrolyte, and the electrolyte can be selected based on needs. The electrolyte can be liquid, gel, or solid.

[0105] The liquid electrolyte includes an electrolyte salt and a solvent.

[0106] In some embodiments, the electrolyte salt may be selected from at least one of lithium hexafluorophosphate, lithium tetrafluoroborate, lithium perchlorate, lithium hexafluoroarsenate, lithium bis(fluorosulfonyl)imide, lithium bis(trifluoromethanesulfonyl)imide, lithium trifluoromethanesulfonate, lithium difluorophosphate, lithium difluorooxalatoborate, lithium dioxalatoborate, lithium difluorodioxalatophosphate, and lithium tetrafluorooxalatophosphate.

[0107] In some embodiments, the solvent can be selected from at least one of ethylene carbonate, propylene carbonate, ethyl methyl carbonate, diethyl carbonate, dimethyl carbonate, dipropyl carbonate, methylpropyl carbonate, ethylpropyl carbonate, butylene carbonate, fluoroethylene carbonate, methyl formate, methyl acetate, ethyl acetate, propyl acetate, methyl propionate, ethyl propionate, propyl propionate, methyl butyrate, ethyl butyrate, 1,4-butyrolactone, cyclopentane, dimethyl sulfone, methyl ethyl sulfone and diethyl sulfone. The solvent can also be an ether solvent. Ether solvents can include one or more of ethylene glycol dimethyl ether, ethylene glycol diethyl ether, diethylene glycol dimethyl ether, triethylene glycol dimethyl ether, tetraethylene glycol dimethyl ether, 1,3-dioxolane, tetrahydrofuran, methyltetrahydrofuran, diphenyl ether and crown ether.

[0108] Among them, the gel electrolyte includes a skeleton network with a polymer as the electrolyte, combined with an ionic liquid-lithium salt.

[0109] Among them, solid electrolytes include polymer solid electrolytes, inorganic solid electrolytes, and composite solid electrolytes.

[0110] As an example, the polymer solid electrolyte may be polyether (polyethylene oxide), polysiloxane, polycarbonate, polyacrylonitrile, polyvinylidene fluoride, polymethyl methacrylate, a single ion polymer, polyionic liquid-lithium salt, cellulose, or the like.

[0111] As an example, the inorganic solid electrolyte can be an oxide solid electrolyte (crystalline perovskite, sodium superconducting ion conductor, garnet, amorphous LiPON film), a sulfide solid electrolyte (crystalline lithium superion conductor (lithium germanium phosphosulfide, silver germanium sulfide), amorphous sulfide) and one or more of a halide solid electrolyte, a nitride solid electrolyte and a hydride solid electrolyte.

[0112] As an example, a composite solid electrolyte is formed by adding an inorganic solid electrolyte filler to a polymer solid electrolyte.

[0113] In some embodiments, the electrode assembly 500a is a wound structure, wherein the positive electrode sheet and the negative electrode sheet are wound into the wound structure.

[0114] In some embodiments, the electrode assembly 500a is provided with tabs 501a that conduct current from the electrode assembly 500a. Tabs include positive and negative tabs. The positive and negative tabs can be located together at one end of the main body or separately at opposite ends of the main body. During the charge and discharge process of the battery 100, the positive and negative active materials react with the electrolyte, and the tabs 501a connect to the electrode terminals 200a to form a current loop.

[0115] The following is an exemplary description of the energy storage device according to an embodiment of the energy storage device.

[0116] In some embodiments, as shown in FIG4 , the energy storage device 10 includes a housing 110, an energy storage unit group 120, a temperature and humidity sensor 130, and a processor 140. The energy storage unit group 120 may be disposed within the housing 110. The temperature and humidity sensor 130 may be disposed within the housing 110. The processor 140 may be disposed on the housing 110 and electrically connected to the temperature and humidity sensor 130 to execute the monitoring method for the energy storage device 10.

[0117] Energy storage device 10 refers to a device that can store energy through a medium or component and release the energy when needed. Energy storage device 10 can realize charging and discharging processes. For example, energy storage device 10 can be a battery or a battery pack. Energy storage device 10 can also include but is not limited to energy storage containers, energy storage cabinets, etc.

[0118] In some embodiments, the energy storage device 10 may be provided with not only the energy storage unit group 120 and the temperature and humidity sensor 130 inside its housing 110 , but also other components such as modules, copper busbars, and distribution boxes.

[0119] The energy storage unit group 120 may be the energy storage element of the energy storage device 10 and is the main element for implementing charging and discharging in the energy storage device 10. Alternatively, the energy storage unit group 120 may be a battery or a battery cell. For example, when the energy storage device 10 is a battery, the energy storage unit group 120 may be a battery cell; when the energy storage device 10 is a battery pack, the energy storage unit group 120 may be a battery.

[0120] Housing 110 is used to isolate energy storage unit assembly 120 from the outside world to protect it. The internal environment formed by housing 110 can accommodate energy storage unit assembly 120 and temperature and humidity sensor 130, as well as other components. Housing 110 can be made of a variety of materials, including but not limited to copper, iron, aluminum, stainless steel, aluminum alloy, and plastic.

[0121] The temperature and humidity sensor 130 is a sensor device equipped with a humidity-sensitive and heat-sensitive element and capable of measuring temperature and humidity. Optionally, the temperature and humidity sensor 130 can use an integrated temperature and humidity probe as a temperature measuring element to collect temperature and humidity signals. After voltage stabilization and filtering, operational amplification, nonlinear correction, V / I conversion, constant current, and reverse protection circuit processing, it is converted into a current signal or voltage signal output that is linearly related to temperature and humidity. Using the temperature and humidity sensor 130 to monitor the interior of the housing 110 can simplify the structure of the energy storage device 10 and save space inside the housing 110 of the energy storage device 10.

[0122] The processor 140 may be an integrated circuit chip having signal processing capabilities, and is used to process signals related to the energy storage device 10, thereby analyzing the operating status of the energy storage device 10, thereby facilitating the digitization, standardization, and intelligence of the energy storage device 10. For example, the processor 140 may also include, but is not limited to, a microcontroller unit (MCU), a general-purpose processor, and the like.

[0123] By arranging the processor 140 outside the shell 110, the processor 140 does not occupy the space inside the shell 110, and fixing the processor 140 to the shell 110 can also improve the connection stability between the processor 140 and the temperature and humidity sensor 130 and other components.

[0124] By providing a temperature and humidity sensor 130 inside the shell 110 of the energy storage device 10, the real-time temperature and real-time humidity inside the shell 110 can be detected in real time, and the environment inside the shell 110 can be monitored in a timely manner. The environment inside the shell 110 can also be judged more accurately based on the real-time temperature and real-time humidity, thereby facilitating subsequent corresponding processing of the environment inside the shell 110.

[0125] In some embodiments, the energy storage device 10 may further include a liquid cooling device 150 . The liquid cooling device 150 may be disposed outside the housing 110 and may be used to cool the housing 110 and the energy storage unit group 120 through circulation of cooling liquid.

[0126] Optionally, the liquid cooling device 150 may include a plurality of parallel liquid cooling pipelines 151 , and each liquid cooling pipeline 151 may be used to cool the shell 110 and the energy storage unit group 120 through the circulation of cooling liquid when turned on.

[0127] Optionally, the liquid cooling pipeline 151 may be disposed outside the housing 110 and may be disposed around the housing 110 to increase the contact area between the liquid cooling device 150 and the housing 110 .

[0128] During the charging and discharging process of the energy storage device 10, the conductive components such as the energy storage unit group 120 inside the energy storage device 10 will gradually heat up. Therefore, providing a liquid cooling device 150 can adjust and control the real-time temperature inside the shell 110 of the energy storage device 10 to maintain the stability of the temperature inside the shell 110 of the energy storage device 10.

[0129] Optionally, the liquid cooling device 150 may be connected to the processor 140, and the processor 140 may be used to control the liquid cooling device 150 to control the temperature inside the energy storage device 10. For example, the processor 140 may adjust the real-time temperature inside the energy storage device 10 by controlling physical quantities such as the temperature of the cooling liquid in the liquid cooling device 150 and the circulation speed of the cooling liquid.

[0130] According to some embodiments, as shown in FIG5 , the present application provides a method for monitoring an energy storage device 10 . The following exemplarily describes the method for monitoring the energy storage device 10 .

[0131] The energy storage device 10 includes a housing 110, an energy storage unit group 120, and a temperature and humidity sensor 130. The energy storage unit group 120 and the temperature and humidity sensor 130 are disposed inside the housing 110. The monitoring method of the energy storage device 10 may include the following steps:

[0132] S100: Detecting the real-time temperature and humidity inside the housing through the temperature and humidity sensor.

[0133] Since the temperature and humidity inside the housing 110 can directly reflect the environment faced by the components inside the housing 110, and excessively high or low temperatures and high humidity can directly affect the use of conductive components such as the energy storage unit group 120, and may even directly damage the conductive components such as the energy storage unit group 120, the temperature and humidity sensor 130 inside the housing 110 is used to detect the temperature and humidity inside the housing 110, which makes it more convenient and intuitive to monitor the internal environment of the housing 110, thereby achieving digitalization, standardization, and intelligentization of the internal environment of the energy storage device 10.

[0134] In some embodiments, the step of detecting the real-time temperature and real-time humidity in the housing 110 by the temperature and humidity sensor 130 may include the following steps S110:

[0135] S110: During the process of outputting electric energy or charging, the real-time temperature and real-time humidity inside the housing are detected by the temperature and humidity sensor.

[0136] When the energy storage device 10 is outputting electrical energy or charging, the conductive elements such as the energy storage unit group 120 inside the housing 110 have higher requirements for the environment inside the housing 110. In particular, after long periods of outputting electrical energy or charging, the temperature of each conductive element will increase. In addition, the energy storage device 10 typically also includes a liquid cooling device 150 to cool the interior of the energy storage device 10. Therefore, when the energy storage device 10 is outputting electrical energy or charging and the liquid cooling device 150 is performing cooling, water mist or condensation is very likely to be generated inside the housing 110. This will significantly reduce the electrical clearance and creepage distance between each conductive element, thereby affecting the operation and use of each conductive element.

[0137] Therefore, the real-time temperature and humidity inside the shell 110 are detected during the operation of the energy storage device 10 outputting electrical energy or charging. This can more efficiently and timely detect the environment inside the shell 110, so as to facilitate subsequent maintenance of the stability of the environment inside the shell 110.

[0138] S200: Determine a dew point temperature that matches the real-time humidity, and compare the real-time temperature with the dew point temperature to obtain a comparison result.

[0139] The dew point temperature refers to the temperature at which air reaches saturation when cooled, while maintaining a constant water vapor content and constant air pressure. In other words, the dew point temperature is the temperature at which water vapor and water reach equilibrium. When the real-time temperature inside housing 110 reaches or falls below the dew point temperature, the water vapor in the air inside housing 110 condenses into small water droplets.

[0140] The water droplets inside the shell 110 will affect the electrical clearance and creepage distance between the conductive elements inside the shell 110. Therefore, by comparing the real-time temperature of the internal environment of the shell 110 with the corresponding dew point temperature inside the shell 110, it can be determined whether the corresponding condensation conditions are met inside the shell 110.

[0141] In some embodiments, determining the dew point temperature that matches the real-time humidity may include the following steps S210:

[0142] S210: Determine the dew point temperature that matches the real-time humidity in the psychrometric chart.

[0143] An enthalpy diagram is used to represent the relationship between various air parameters. An enthalpy diagram can be drawn based on parameters such as temperature, relative humidity, and enthalpy. Alternatively, the diagram can be used to find corresponding parameters such as humidity, moisture content, and enthalpy using these parameters. Before the energy storage device 10 is properly operated using the monitoring method described herein, the internal environment of the housing 110 of the energy storage device 10 can be tested. Parameters such as the air pressure, humidity, and temperature within the housing 110 can be used to draw a enthalpy diagram that matches the internal environment of the housing 110.

[0144] The dew point temperature is determined by the air pressure, humidity, and temperature. Therefore, after knowing the real-time humidity and temperature, the dew point temperature corresponding to the internal environment of the shell 110 can be simply and accurately found using a psychrometric diagram. This can simplify the process of obtaining the dew point temperature and make the monitoring method of the energy storage device 10 more efficient.

[0145] S300: Execute a processing strategy that matches the comparison result.

[0146] After comparing the real-time temperature with the dew point temperature, the comparison result can indicate whether the environment inside the housing 110 meets the condensation conditions. If the comparison result shows that the real-time temperature is greater than the dew point temperature, this indicates that the environment inside the housing 110 does not meet the condensation conditions, and condensation is highly likely not occurring inside the housing 110. If the comparison result shows that the real-time temperature is less than or equal to the dew point temperature, this indicates that the environment inside the housing 110 meets the condensation conditions, and condensation is highly likely to occur inside the housing 110.

[0147] Furthermore, different processing strategies may be executed for different comparison results.

[0148] In some embodiments, executing a processing strategy that matches the comparison result may include the following steps S310:

[0149] S310 : If the comparison result shows that the real-time temperature is less than or equal to the dew point temperature, a warning message indicating that condensation may occur in the housing 110 is output.

[0150] Specifically, when the comparison result shows that the real-time temperature is less than or equal to the dew point temperature, it indicates that condensation is very likely to occur inside the shell 110. Therefore, the corresponding warning information is output in a timely manner at this time, and the dangerous situation inside the shell 110 of the energy storage device 10 can be fed back in time to facilitate subsequent further maintenance of the energy storage device 10.

[0151] In some embodiments, the warning information may include, but is not limited to, display screen prompt information, signal light warning information, sound warning information, and the like.

[0152] In some embodiments, the energy storage device 10 may include a liquid cooling device 150 . The liquid cooling device 150 may be disposed outside the housing 110 and may be used to cool the housing 110 and the energy storage unit group 120 through circulation of a cooling liquid.

[0153] In some embodiments, the step of executing a processing strategy that matches the comparison result may further include step S320:

[0154] S320: If the comparison result shows that the real-time temperature is less than or equal to the dew point temperature, the liquid cooling device is controlled to adjust the temperature and / or circulation speed of the cooling liquid so that the real-time temperature is greater than the dew point temperature.

[0155] If the comparison result is that the real-time temperature is less than or equal to the dew point temperature, it means that condensation may have occurred inside the shell 110, and water condensation beads or water mist may have appeared inside the shell 110. In order to eliminate the water condensation beads or water mist inside the shell 110, the real-time temperature needs to be raised to a temperature greater than the dew point temperature.

[0156] The real-time temperature inside the shell 110 is related to the temperature and / or circulation speed of the cooling liquid in the liquid cooling device 150. Therefore, the cooling speed of the liquid cooling device 150 can be adjusted by controlling the temperature and / or circulation speed of the cooling liquid in the liquid cooling device 150, so that the real-time temperature inside the shell 110 increases.

[0157] By directly using the liquid cooling device 150 to adjust the real-time temperature inside the energy storage device 10 after determining that the real-time temperature is less than or equal to the dew point temperature, the real-time temperature can be quickly adjusted to be greater than the dew point temperature, so that the internal environment of the energy storage device 10 is quickly free from condensation conditions, thereby achieving precise control of the internal environment of the energy storage device 10. It is also possible to promptly reduce the accumulation of condensed water and excessive internal humidity in the energy storage device 10, thereby reducing the occurrence of conductive elements in the energy storage device 10 being in a condensation environment for a long time, thereby more effectively protecting the energy storage device 10.

[0158] In some embodiments, the energy storage device 10 may include a liquid cooling device 150, which may be disposed outside the shell 110. The liquid cooling device 150 may include a plurality of parallel liquid cooling pipes 151. Each liquid cooling pipe 151 may be used to cool the shell 110 and the energy storage unit group 120 through the circulation of cooling liquid when turned on.

[0159] By providing multiple parallel liquid cooling pipes 151, the contact area between the liquid cooling device 150 and the shell 110 can be increased to improve the cooling speed of the liquid cooling device 150, thereby being able to more quickly adjust the real-time temperature inside the shell 110, and more effectively maintain the stability of the internal environment of the shell 110 of the energy storage device 10.

[0160] In some embodiments, the step of executing a processing strategy that matches the comparison result may further include step S330:

[0161] S330: If the comparison result shows that the real-time temperature is less than or equal to the dew point temperature, the liquid cooling device 150 controls at least one liquid cooling pipeline 151 to be open, so that the real-time temperature is greater than the dew point temperature.

[0162] If the comparison result is that the real-time temperature is less than or equal to the dew point temperature, it means that condensation may have occurred inside the shell 110 and the humidity inside the shell 110 is too high. At this time, by setting the control liquid cooling device 150 to control at least one liquid cooling pipeline 151 to open to cool the shell 110 and the energy storage unit group 120, the temperature adjustment speed of the liquid cooling device 150 can be enhanced, making the control process of the liquid cooling device 150 more flexible.

[0163] In some embodiments, the step of controlling the liquid cooling device 150 to control at least one liquid cooling pipeline 151 to open may include: controlling the liquid cooling device 150 to control at least one liquid cooling pipeline 151 to open and adjusting the temperature and / or circulation speed of the cooling liquid in the corresponding liquid cooling pipeline 151.

[0164] Because the liquid cooling device 150 cools the interior of the housing 110 of the energy storage device 10 via at least one liquid cooling pipe 151, the real-time temperature within the housing 110 of the energy storage device 10 is related to the temperature and / or circulation rate of the cooling liquid in the at least one liquid cooling pipe 151. Therefore, when it is determined that the real-time temperature is less than or equal to the dew point temperature, the real-time temperature is increased to greater than the dew point temperature by controlling the opening of at least one liquid cooling pipe 151 and promptly adjusting the temperature and / or circulation rate of the cooling liquid within the liquid cooling pipe 151. This makes the temperature control process within the energy storage device 10 using the liquid cooling device 150 faster and more convenient, thereby reducing the accumulation of condensed water and excessive internal humidity within the housing 110 of the energy storage device 10.

[0165] In some embodiments, the step of controlling the liquid cooling device 150 to adjust the cooling temperature and / or circulation speed of the cooling liquid may include the following steps S331-S332:

[0166] S331: Calculate the temperature difference between the dew point temperature and the real-time temperature.

[0167] Specifically, after the comparison result between the dew point temperature and the real-time temperature is determined, the temperature difference between the dew point temperature and the real-time temperature is further calculated.

[0168] S332: Control the liquid cooling device to adjust the temperature and / or circulation speed of the cooling liquid according to the corresponding relationship between the temperature difference and the temperature and / or circulation speed of the cooling liquid.

[0169] For example, if the dew point temperature inside the shell 110 is 30°C, the real-time temperature is 20°C, the temperature difference between the dew point and the real-time temperature is 10°C, and the temperature of the cooling liquid is 10°C, the temperature of the cooling liquid can be adjusted to 35°C or 40°C, etc., which is greater than the dew point temperature, so that the real-time temperature inside the shell 110 can be restored, so that the real-time temperature inside the shell 110 can be quickly restored from 20°C to above 30°C. Optionally, if the circulation speed of the cooling liquid is 2m / s, the circulation speed of the cooling liquid can be reduced while adjusting to increase the temperature of the cooling liquid, for example, to 1m / s, 0.5m / s, etc., so that the cooling liquid has sufficient time to adjust to the real-time temperature inside the shell 110.

[0170] By utilizing the temperature difference between the dew point temperature and the real-time temperature to adjust the temperature and / or circulation speed of the cooling liquid of the liquid cooling device 150, the control process of the internal environment of the energy storage device 10 by the liquid cooling device 150 can be simplified, and the real-time temperature inside the energy storage device 10 can be quickly raised to above the dew point temperature, thereby reducing the accumulation of condensed water inside the energy storage device 10 and the occurrence of excessive internal humidity, thereby more effectively maintaining the operation and use of the energy storage device 10.

[0171] In other embodiments, the step of controlling the liquid cooling device 150 to control at least one liquid cooling pipe 151 to pass cooling liquid may further include steps S333-S334:

[0172] S333: Calculate the temperature difference between the dew point temperature and the real-time temperature.

[0173] S334: Determine the number of opened liquid cooling pipelines that match the temperature difference, and control the liquid cooling device 150 to open the opened number of liquid cooling pipelines.

[0174] For example, liquid cooling device 150 has four liquid cooling pipes 151. During normal charging and discharging of energy storage device 10, all four liquid cooling pipes 151 are open to simultaneously cool the interior of housing 110 of energy storage device 10. After determining that the real-time temperature inside housing 110 is less than the dew point temperature, the temperature difference between the dew point temperature and the real-time temperature can be further calculated, and the number of liquid cooling pipes 151 to be opened is determined based on the temperature difference. For example, if the temperature difference is 10°C, and if the number of liquid cooling pipes 151 opened corresponding to this temperature difference is 2, 1, or 0, liquid cooling device 150 is further controlled to open 2, 1, or 0 liquid cooling pipes 151, while closing the remaining liquid cooling pipes 151. This reduces the cooling rate of energy storage device 10 or stops cooling, and utilizes the thermal effect of the conductive components inside housing 110 of energy storage device 10 to raise the real-time temperature inside housing 110. Optionally, the temperature of the cooling liquid in the liquid cooling pipe 151 may be adjusted to allow the temperature inside the housing 110 to rise in real time.

[0175] Alternatively, if the energy storage device 10 is normally charging and discharging, both liquid cooling pipes 151 are opened to cool the interior of the housing 110 of the energy storage device 10. After determining that the real-time temperature inside the housing 110 is less than the dew point temperature, the temperature difference between the dew point temperature and the real-time temperature is further calculated. The number of liquid cooling pipes 151 opened to match this temperature difference can be three or four, thereby improving the liquid cooling device 150's ability to control the real-time temperature inside the energy storage device 10. The liquid cooling device 150 can further adjust the temperature of the cooling liquid to increase the real-time temperature inside the energy storage device 10.

[0176] By utilizing the temperature difference between the dew point temperature and the real-time temperature to determine the number of opening liquid cooling pipes 151 that match, and controlling the liquid cooling device 150 to open the liquid cooling pipes 151, the process of adjusting the real-time temperature by the liquid cooling device 150 can also be made more efficient, and the temperature control process of the liquid cooling device 150 can be made more flexible, so that the energy storage device 10 can save energy while achieving efficient temperature control.

[0177] In some embodiments, the step of determining the number of opened liquid cooling pipes 151 that matches the temperature difference and controlling the liquid cooling device 150 to open the opened number of liquid cooling pipes 151 may include steps S335-S336:

[0178] S335: Determine the number of liquid cooling pipes to be opened that matches the temperature difference and determine the temperature and / or circulation speed of the cooling liquid in the liquid cooling pipes to be opened.

[0179] Specifically, after obtaining the number of openings of the liquid cooling pipeline 151, the temperature and / or circulation speed of the cooling liquid in the liquid cooling pipeline 151 can be further calculated based on the number of openings of the liquid cooling pipeline 151, so that the liquid cooling device 150 can efficiently control the temperature inside the shell 110 according to the real-time situation.

[0180] For example, if the dew point temperature inside the housing 110 of the energy storage device 10 is 30°C, the real-time temperature is 20°C, the temperature of the cooling liquid is 15°C, and the cooling liquid circulation speed is 2 m / s, then the temperature difference between the dew point temperature inside the housing 110 of the energy storage device 10 and the real-time temperature is 10°C. If the number of open liquid cooling pipes 151 corresponding to this temperature difference is two, the cooling liquid temperature in these two liquid cooling pipes 151 can be adjusted to 40°C. Alternatively, the cooling liquid circulation speed can be reduced to 0.5 m / s.

[0181] If the number of open liquid cooling pipes 151 corresponding to the temperature difference is 3, the temperature of the cooling liquid in the three liquid cooling pipes 151 can be adjusted to 35° C. Optionally, the circulation speed of the cooling liquid can be reduced to 1 m / s.

[0182] The matching result between the number of openings of the liquid cooling pipes 151 and the temperature and / or circulation speed of the cooling liquid can be obtained through testing before the energy storage device 10 is put into normal use.

[0183] By calculating and determining the temperature and / or circulation rate of the cooling liquid in the liquid cooling pipe 151 using the number of openings of the liquid cooling pipe 151, the temperature control process of the energy storage device 10 can be made more standardized and efficient. It can also control energy consumption and reduce costs while highly controlling the temperature inside the energy storage device 10, and it is less likely to cause waste of resources.

[0184] S336: Control the liquid cooling device to open a certain number of liquid cooling pipelines and control the corresponding liquid cooling pipelines to perform circulation cooling according to the determined temperature and / or circulation speed of the cooling liquid.

[0185] According to the corresponding matching results, opening a certain number of liquid cooling pipes 151 and controlling the temperature and / or circulation speed of the cooling liquid for circulatory cooling can make the temperature control process of the energy storage device 10 more intelligent and standardized.

[0186] In some embodiments, after determining that the real-time temperature is less than or equal to the dew point temperature, the following steps S400 may be further included:

[0187] S400: If the comparison result is that the real-time temperature is greater than the dew point temperature, the liquid cooling device is controlled to turn on the insulation mode to control the temperature and / or circulation speed of the cooling liquid according to the insulation mode, so that the difference between the real-time temperature and the dew point temperature is less than the preset temperature threshold.

[0188] By turning on the insulation mode after determining that the real-time temperature inside the shell 110 is greater than the dew point temperature, the stability of the internal environment of the energy storage device 10 can be maintained as much as possible, thereby making it less likely for condensation or excessive humidity to occur inside the shell 110, thereby more effectively preventing condensation from occurring inside the shell 110 of the energy storage device 10.

[0189] In other embodiments, after determining that the real-time temperature is less than or equal to the dew point temperature, other methods and measures may be used to maintain the stability of the internal environment of the energy storage device 10 .

[0190] For example, an exhaust hole and an exhaust device that communicate with the inside and outside of the shell 110 can be provided on the shell 110 of the energy storage device 10. After determining that the real-time temperature is greater than the dew point temperature, or after determining that the real-time temperature is less than or equal to the dew point temperature and executing a processing strategy that matches the comparison result so that the real-time temperature is greater than the dew point temperature, the exhaust device is used to exhaust the shell 110 of the energy storage device 10 to extract water vapor from the shell 110 to the outside of the shell 110, thereby reducing the real-time humidity inside the shell 110 and maintaining the stability of the internal environment of the energy storage device 10.

[0191] Of course, there may be other different methods and measures in other ways, which will not be listed in detail in this embodiment.

[0192] According to some embodiments of the present application, as shown in FIG6 , the present application provides an electrical device 2, which may include an energy storage device 10 and a battery management system 20. The energy storage device 10 includes a housing 110, an energy storage unit group 120, and a temperature and humidity sensor 130. The energy storage unit group 120 and the temperature and humidity sensor 130 are disposed inside the housing 110. The battery management system 20 is electrically connected to the temperature and humidity sensor 130 to implement the monitoring method of the energy storage device 10 as described in the above embodiment.

[0193] The battery management system 20 can be a system with processing functions and signal processing capabilities, used to process signals related to the energy storage device 10, thereby facilitating analysis of the operating status of the energy storage device 10 and achieving digitalization, standardization, and intelligence of the energy storage device 10. For example, the battery management system 20 can be a BMS (battery management system) that can intelligently manage and maintain each battery cell, monitor battery status, prevent overcharging and over-discharging, and thus extend the battery life. The battery management system 20 can include components such as a microcontroller unit (MCU) and a general-purpose processor 140.

[0194] Specifically, the real-time temperature and real-time humidity detected by the temperature and humidity sensor 130 are transmitted to the battery management system 20 in real time. After receiving the real-time temperature and real-time humidity, the battery management system 20 can implement the monitoring method of the energy storage device 10 in the above embodiment to maintain the internal environment of the energy storage device 10.

[0195] Optionally, the battery management system 20 may also be connected to the liquid cooling device 150 of the energy storage device 10 . The battery management system 20 may adjust the real-time temperature inside the housing 110 of the energy storage device 10 by controlling the liquid cooling device 150 .

[0196] As shown in FIG. 7 , FIG. 7 is an embodiment of a monitoring method for an energy storage device 10 . The battery management system 20 can implement and execute the monitoring method for the energy storage device 10 shown in FIG. 7 .

[0197] According to some embodiments of the present application, as shown in FIG4 , the present application provides an energy storage device 10, which includes a housing 110, an energy storage unit group 120, a temperature and humidity sensor 130, and a processor 140. The energy storage unit group 120 is disposed inside the housing 110. The temperature and humidity sensor 130 is disposed inside the housing 110. The processor 140 is disposed on the housing 110 and is electrically connected to the temperature and humidity sensor 130, and is used to execute the monitoring method of the energy storage device 10 as described in the above embodiment.

[0198] The processor 140 may receive the real-time temperature and real-time humidity signals transmitted by the temperature and humidity sensor 130 , and execute the monitoring method of the energy storage device 10 as in the above embodiment.

[0199] Optionally, the processor 140 may also be connected to the liquid cooling device 150 of the energy storage device 10 . The processor 140 may adjust the real-time temperature inside the housing 110 of the energy storage device 10 by controlling the liquid cooling device 150 .

[0200] As shown in FIG. 7 , FIG. 7 is an embodiment of a monitoring method for the energy storage device 10 . The processor 140 can implement and execute the monitoring method for the energy storage device 10 shown in FIG. 7 .

[0201] According to some embodiments of the present application, as shown in Figures 4 and 5, the present application provides a method for monitoring an energy storage device 10. The energy storage device 10 includes a housing 110, an energy storage unit group 120, and a temperature and humidity sensor 130. The energy storage unit group 120 and the temperature and humidity sensor 130 are disposed within the housing 110. The method includes: detecting the real-time temperature and real-time humidity within the housing 110 using the temperature and humidity sensor 130. Determining a dew point temperature that matches the real-time humidity, and comparing the real-time temperature with the dew point temperature to obtain a comparison result. Executing a processing strategy that matches the comparison result. Determining the dew point temperature that matches the real-time humidity includes: determining a dew point temperature that matches the real-time humidity in a psychrometric diagram. Executing a processing strategy that matches the comparison result includes: if the comparison result indicates that the real-time temperature is less than or equal to the dew point temperature, outputting a warning message indicating possible condensation within the housing 110. The energy storage device 10 includes a liquid cooling device 150, which is arranged outside the shell 110 and is used to cool the shell 110 and the energy storage unit group 120 by circulating a cooling liquid. A processing strategy that matches the comparison result is executed, including: if the comparison result is that the real-time temperature is less than or equal to the dew point temperature, then the liquid cooling device 150 is controlled to adjust the temperature and / or circulation speed of the cooling liquid, thereby making the real-time temperature greater than the dew point temperature. Controlling the liquid cooling device 150 to adjust the cooling temperature and / or circulation speed of the cooling liquid includes: calculating the temperature difference between the dew point temperature and the real-time temperature. According to the corresponding relationship between the temperature difference and the temperature and / or circulation speed of the cooling liquid, the liquid cooling device 150 is controlled to adjust the temperature and / or circulation speed of the cooling liquid. The energy storage device 10 includes a liquid cooling device 150, which is disposed outside the housing 110. The liquid cooling device 150 includes a plurality of parallel liquid cooling pipes 151. Each liquid cooling pipe 151 is configured to cool the housing 110 and the energy storage unit group 120 by circulating cooling liquid when enabled. A processing strategy matching the comparison result is executed, including: if the comparison result shows that the real-time temperature is less than or equal to the dew point temperature, controlling the liquid cooling device 150 to open at least one liquid cooling pipe 151 so that the real-time temperature is greater than the dew point temperature. Controlling the liquid cooling device 150 to control the flow of cooling liquid into at least one liquid cooling pipe 151 includes: calculating the temperature difference between the dew point temperature and the real-time temperature. Determining the number of liquid cooling pipes 151 to be enabled that match the temperature difference, and controlling the liquid cooling device 150 to enable that number of liquid cooling pipes 151. Determining the number of liquid cooling pipes 151 to be opened that matches the temperature difference, and controlling the liquid cooling device 150 to open the opened number of liquid cooling pipes 151, includes: determining the number of liquid cooling pipes 151 to be opened that matches the temperature difference, and determining the temperature and / or circulation rate of the cooling liquid in the opened liquid cooling pipes 151. Controlling the liquid cooling device 150 to open the opened number of liquid cooling pipes 151 and controlling the corresponding liquid cooling pipes 151 to circulate cooling according to the determined temperature and / or circulation rate of the cooling liquid.Controlling the liquid cooling device 150 to open at least one liquid cooling pipeline 151 includes: controlling the liquid cooling device 150 to open at least one liquid cooling pipeline 151 and adjusting the temperature and / or circulation rate of the cooling liquid within the corresponding liquid cooling pipeline 151. Detecting the real-time temperature and humidity within the housing 110 via the temperature and humidity sensor 130 includes: detecting the real-time temperature and humidity within the housing 110 via the temperature and humidity sensor 130 during the process of outputting electrical energy or charging. The energy storage device 10 includes a liquid cooling device 150, which is disposed outside the housing 110 and is used to cool the housing 110 and the energy storage unit group 120 by circulating cooling liquid. After determining that the real-time temperature is less than or equal to the dew point temperature, the method includes: if the comparison result shows that the real-time temperature is greater than the dew point temperature, controlling the liquid cooling device 150 to activate a heat preservation mode, thereby controlling the temperature and / or circulation rate of the cooling liquid in accordance with the heat preservation mode so that the difference between the real-time temperature and the dew point temperature is less than a preset temperature threshold.

[0202] According to some embodiments of the present application, as shown in FIG6 , the present application provides an electrical device 2, which may include an energy storage device 10 and a battery management system 20. The energy storage device 10 includes a housing 110, an energy storage unit group 120, and a temperature and humidity sensor 130. The energy storage unit group 120 and the temperature and humidity sensor 130 are disposed inside the housing 110. The battery management system 20 is electrically connected to the temperature and humidity sensor 130 to implement the monitoring method of the energy storage device 10 as described in the above embodiment.

[0203] According to some embodiments of the present application, as shown in FIG4 , the present application provides an energy storage device 10, which includes a housing 110, an energy storage unit group 120, a temperature and humidity sensor 130, and a processor 140. The energy storage unit group 120 is disposed inside the housing 110. The temperature and humidity sensor 130 is disposed inside the housing 110. The processor 140 is disposed on the housing 110 and is electrically connected to the temperature and humidity sensor 130, and is used to execute the monitoring method of the energy storage device 10 as described in the above embodiment.

[0204] In summary, a temperature and humidity sensor 130 is provided within the energy storage device 10. The real-time humidity and temperature detected by the temperature and humidity sensor 130 are used to calculate the dew point temperature corresponding to the internal environment of the energy storage device 10. The real-time temperature is then compared with the dew point temperature to obtain a comparison result that reflects the internal environment of the energy storage device 10. Targeted processing is then performed corresponding to the current real-time environment within the energy storage device 10. This configuration not only allows for real-time monitoring of the internal environment of the energy storage device 10, but also allows for real-time processing corresponding to the current environment within the energy storage device 10. This makes it possible to prevent the conductive elements within the energy storage device 10 from being affected by the internal environment during use, thereby more effectively maintaining the operation and use of the energy storage device 10.

[0205] The above description is merely an embodiment of the present application and does not limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the present application specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A monitoring method for an energy storage device, characterized in that, The energy storage device comprises a housing, an energy storage unit group and a temperature and humidity sensor, wherein the energy storage unit group and the temperature and humidity sensor are arranged inside the housing, and the method comprises: Detecting the real-time temperature and real-time humidity inside the housing by means of the temperature and humidity sensor; Determine a dew point temperature that matches the real-time humidity, and compare the real-time temperature with the dew point temperature to obtain a comparison result; A processing strategy matching the comparison result is executed.

2. The method according to claim 1, characterized in that The determining of the dew point temperature matching the real-time humidity comprises: The dew point temperature that matches the real-time humidity is determined in the psychrometric diagram.

3. The method according to claim 1, characterized in that The executing a processing strategy that matches the comparison result includes: If the comparison result is that the real-time temperature is less than or equal to the dew point temperature, a warning message indicating that condensation may occur in the housing is output.

4. The method according to any one of claims 1 to 3, characterized in that: The energy storage device includes a liquid cooling device, which is arranged outside the shell and is used to cool the shell and the energy storage unit group by circulating a cooling liquid; The executing a processing strategy that matches the comparison result includes: If the comparison result is that the real-time temperature is less than or equal to the dew point temperature, the liquid cooling device is controlled to adjust the temperature and / or circulation speed of the cooling liquid, so that the real-time temperature is greater than the dew point temperature.

5. The method according to claim 4, characterized in that The controlling the liquid cooling device to adjust the cooling temperature and / or circulation speed of the cooling liquid comprises: Calculating a temperature difference between the dew point temperature and the real-time temperature; The liquid cooling device is controlled to adjust the temperature of the cooling liquid and / or the circulation speed according to the corresponding relationship between the temperature difference and the temperature of the cooling liquid and / or the circulation speed.

6. The method according to claim 1, characterized in that The energy storage device includes a liquid cooling device, which is arranged outside the shell, and includes a plurality of parallel liquid cooling pipelines, each of which is used to cool the shell and the energy storage unit group through the circulation of the cooling liquid when it is turned on; The executing a processing strategy that matches the comparison result includes: If the comparison result is that the real-time temperature is less than or equal to the dew point temperature, the liquid cooling device is controlled to control at least one of the liquid cooling pipelines to open, so that the real-time temperature is greater than the dew point temperature.

7. The method according to claim 6, characterized in that The controlling the liquid cooling device to control at least one of the liquid cooling pipelines to pass the cooling liquid comprises: Calculating a temperature difference between the dew point temperature and the real-time temperature; Determine the number of liquid cooling pipelines that are opened and match the temperature difference, and control the liquid cooling device to open the number of liquid cooling pipelines that are opened.

8. The method according to claim 7, characterized in that Determining the number of the liquid cooling pipelines that match the temperature difference and controlling the liquid cooling device to open the liquid cooling pipelines with the determined number includes: Determining the number of the liquid cooling pipelines that match the temperature difference and determining the temperature and / or circulation speed of the cooling liquid in the liquid cooling pipelines to be opened; Controlling the liquid cooling device to open the liquid cooling pipelines with the determined number and controlling the corresponding liquid cooling pipelines to perform circulating cooling according to the determined temperature and / or circulation speed of the cooling liquid.

9. The method according to claim 6, wherein The controlling the liquid cooling device to control at least one of the liquid cooling pipelines to open includes: Controlling the liquid cooling device to control at least one of the liquid cooling pipelines to open and adjusting the temperature and / or circulation speed of the cooling liquid in the corresponding liquid cooling pipeline.

10. The monitoring method according to claim 1, wherein The detecting the real-time temperature and real-time humidity in the housing by the temperature and humidity sensor includes: During the process of outputting electric energy or charging outward, detecting the real-time temperature and the real-time humidity inside the housing by the temperature and humidity sensor.

11. The monitoring method according to claim 1, wherein The energy storage device includes a liquid cooling device, the liquid cooling device is arranged outside the housing, and is used for cooling the housing and the energy storage unit group through the circulation of the cooling liquid; The executing the processing strategy that matches the comparison result includes: If the comparison result is that the real-time temperature is greater than the dew point temperature, controlling the liquid cooling device to turn on the heat preservation mode to control the temperature and / or circulation speed of the cooling liquid according to the heat preservation mode, so that the difference between the real-time temperature and the dew point temperature is less than a preset temperature threshold.

12. An electrical device, characterized in that, Includes: An energy storage device, including a housing, an energy storage unit group and a temperature and humidity sensor, the energy storage unit group and the temperature and humidity sensor are arranged inside the housing; A battery management system, electrically connected to the temperature and humidity sensor, and used for implementing the monitoring method of the energy storage device according to any one of claims 1-11.

13. An energy storage device, characterized in that, Includes: A housing; An energy storage unit group, arranged inside the housing; A temperature and humidity sensor, the temperature and humidity sensor is arranged inside the housing; A processor, arranged on the housing and electrically connected to the temperature and humidity sensor, and used for executing the monitoring method of the energy storage device according to any one of claims 1-11.

Images