CN116190855A

CN116190855A - Energy storage equipment, energy storage system, power station and charging equipment

Info

Publication number: CN116190855A
Application number: CN202310186681.4A
Authority: CN
Inventors: 常鹏; 童永煌; 孟程
Original assignee: Huawei Digital Power Technologies Co Ltd
Current assignee: Huawei Digital Power Technologies Co Ltd
Priority date: 2023-02-22
Filing date: 2023-02-22
Publication date: 2023-05-30

Abstract

The application provides energy storage equipment, energy storage system, power station and charging equipment, relates to the energy technical field to solve the technical problem that the condensation harm. The energy storage device comprises a box body and a battery positioned in the box body; the device also comprises a first heating film, a first thermometer, a second thermometer, a hygrometer and a controller; the first heating film is in heat conduction contact with the battery, the first thermometer is used for detecting the temperature of the battery, the second thermometer is used for detecting the temperature of air in the box, the hygrometer is used for detecting the humidity of air in the box, and the controller is connected with the first heating film, the first thermometer, the second thermometer and the hygrometer and used for controlling the heating of the first heating film according to information detected by the hygrometer, the first thermometer and the second thermometer, so that condensation is prevented. The energy storage equipment can effectively reduce or prevent the damage of condensation, and can improve the use safety and service life of the energy storage equipment.

Description

Energy storage equipment, energy storage system, power station and charging equipment

Technical Field

The application relates to the technical field of energy sources, in particular to energy storage equipment, an energy storage system, a power station and charging equipment.

Background

With the continuous development and widespread use of clean energy, energy storage devices capable of storing electric energy are beginning to be widely used in various fields. In the energy storage device, a plurality of batteries connected in series-parallel are generally placed in a box body, so that the box body plays an effective role in protecting the batteries. In practical use, the battery needs to be ensured to be in a normal temperature range, so that the charge and discharge performance and the use safety of the battery are ensured. In addition, when the humidity in the case is too high, corrosion may be formed to some parts or electronic devices in the case, and even short circuit or other defects may occur, so that the service life and safety of the battery may not be ensured.

Disclosure of Invention

The application provides energy storage equipment, an energy storage system, a power station and charging equipment capable of effectively preventing condensation damage.

In a first aspect, the present application provides an energy storage device that may include a housing and a battery positioned within the housing. The device also comprises a first heating film, a first thermometer, a second thermometer, a hygrometer and a controller. The first heating film is arranged on the outer surface of the battery and is in heat conduction contact with the battery. The first thermometer is arranged in the box body and is used for detecting the temperature of the battery. The second thermometer is arranged in the box body and is used for detecting the temperature of air in the box body. The hygrometer is arranged in the box body and used for detecting the humidity of air in the box body. The controller is connected with the first heating film, the first thermometer, the second thermometer and the hygrometer; the controller is used for heating the first heating film when the humidity value detected by the hygrometer is larger than a preset value, the temperature value detected by the first thermometer is smaller than a first threshold value, and the temperature value detected by the second thermometer is larger than a second threshold value. In the energy storage equipment that this application provided, can improve the temperature on battery surface as required through set up first heating film at the surface of battery to can prevent effectively that steam from condensing on the surface of battery. In addition, the first thermometer can effectively detect the temperature of the battery, and the second thermometer can effectively detect the temperature of the air in the box body. The controller can calculate the temperature difference between the battery and the air in the box body according to the temperature values detected by the first thermometer and the second thermometer. In addition, according to the humidity value of the air detected by the hygrometer, whether the surface of the battery has condensation risk can be judged. When there is the condensation risk, the controller can control first heating film heating to promote the temperature of battery to can reduce the difference in temperature between battery and the box in the air, in order to prevent that steam from condensing at the surface of battery.

In one example, the controller may also automatically turn off the first heating film according to the detection results of the first thermometer, the second thermometer and the hygrometer to save electric power. For example, the controller is configured to stop heating the first heating film when the temperature value detected by the first thermometer is greater than a third threshold value.

When specifically arranged, the first heating film may be arranged on a first side surface and a second side surface, wherein the first side surface and the second side surface are two surfaces of the battery facing away from each other. And, the first side and the second side are the largest of the outer surfaces of the battery.

In one example, the energy storage device may further include a second heating film and a third thermometer. The second heating film is arranged on the inner wall of the box body and is in heat conduction contact with the box body. The third thermometer is used for detecting the temperature of the inner wall of the box body. The controller is also connected with the second heating film and the third thermometer, and is used for heating the second heating film when the humidity value detected by the hygrometer is larger than a preset value, the temperature value detected by the third thermometer is smaller than a fourth threshold value and the temperature value detected by the second thermometer is larger than a second threshold value. The temperature of the inner wall of the box body can be increased as required by arranging the second heating film on the inner wall of the box body, so that water vapor can be effectively prevented from condensing on the inner wall of the box body. In addition, the temperature of the inner wall of the box body can be effectively detected through the third thermometer, and the temperature of the air in the box body can be effectively detected through the second thermometer. The controller can calculate the temperature difference between the inner wall of the box body and the air in the box body according to the temperature values detected by the third thermometer and the second thermometer. In addition, according to the humidity value of the air detected by the hygrometer, whether the inner wall of the box body has condensation risk can be judged. When there is the condensation risk, the controller can control the second heating film heating to promote the temperature of box inner wall to can reduce the difference in temperature between box inner wall and the air in the box, in order to prevent that steam from condensing at the inner wall of box.

In one example, the controller may also automatically turn off the second heating film according to the detection results of the third thermometer, the second thermometer, and the hygrometer to save power. For example, the controller is configured to stop heating the second heating film when the temperature value detected by the third thermometer is greater than a fifth threshold value.

In one example, a moisture absorption layer may be provided on at least a portion of the surface of the first heating film or the second heating film. The moisture absorption layer can effectively reduce the humidity of air in the box body, so that the risk of condensation can be reduced. On the other hand, after the condensation is generated, the moisture absorption layer can effectively absorb the condensation, so that the damage of the condensation to the surface of the battery or the inner wall of the box body can be avoided.

In a second aspect, the present application further provides an energy storage system, which may include an inverter and any of the energy storage devices described above, where the inverter is electrically connected to the energy storage device and is configured to convert ac power into dc power and provide the dc power to the energy storage device, or convert dc power from the energy storage device into ac power. By applying the energy storage equipment, the risk of condensation generated by the energy storage system can be effectively reduced, and the safety and the service life of the energy storage system can be effectively improved.

In a third aspect, the present application also provides a power station, which may include a power generation device and any of the energy storage devices described above, the power generation device being electrically connected to the energy storage device, the power generation device being configured to store generated electrical energy into a battery in the energy storage device. By applying the energy storage equipment, the risk of condensation generated by the power station can be effectively reduced, and the safety and the service life of the power station can be effectively improved.

In a fourth aspect, the present application further provides a charging device, including a charging post and any of the energy storage devices described above, the charging post being electrically connected to the energy storage device, a battery in the energy storage device being configured to provide electrical energy to the charging post. By applying the energy storage equipment, the risk of condensation generated by the charging equipment can be effectively reduced, and the safety and the service life of the charging equipment can be effectively improved.

In one example, the charging pile may include an ac-dc converter or a dc-dc converter, or may also include an ac-dc converter and a dc-dc converter. The charging pile can be used for providing electric energy in a power grid to the energy storage device so as to store energy, and can also be used for providing electric energy in the energy storage device to the power receiving device.

In one example, the charging device may further include a power generation device, which is connected to the charging pile and may be configured to provide the generated electric energy to the energy storage device for energy storage, so as to achieve efficient use of energy.

Drawings

Fig. 1 is a schematic structural diagram of a conventional energy storage device provided in the present application;

fig. 2 is a schematic structural diagram of an energy storage device according to an embodiment of the present application;

fig. 3 is a block diagram of an energy storage device according to an embodiment of the present disclosure;

fig. 4 is a schematic structural diagram of a first heating film according to an embodiment of the present disclosure;

fig. 5 is a flowchart of an energy storage device according to an embodiment of the present disclosure;

fig. 6 is a schematic diagram of an energy storage device according to an embodiment of the present disclosure;

fig. 7 is a schematic structural diagram of a battery cell according to an embodiment of the present application;

fig. 8 is a sectional view of a part of the structure of an energy storage device according to an embodiment of the present application;

fig. 9 is a schematic structural diagram of another energy storage device according to an embodiment of the present disclosure;

FIG. 10 is a block diagram of another energy storage device according to an embodiment of the present disclosure;

FIG. 11 is a block diagram of an energy storage system according to an embodiment of the present disclosure;

FIG. 12 is a block diagram of a power station according to an embodiment of the present disclosure;

fig. 13 is a block diagram of a charging device according to an embodiment of the present application.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the present application more apparent, the present application will be described in further detail with reference to the accompanying drawings.

In order to facilitate understanding of the energy storage device provided in the embodiments of the present application, an application scenario thereof is first described below.

The energy storage device provided by the embodiment of the application can be applied to the scenes of household energy storage, industrial energy storage, data centers, power stations, vehicle charging and the like and is used for storing and releasing electric energy.

As shown in fig. 1, in the energy storage device, a case 11 and a battery 12 provided in the case 11 may be included. The case 11 can provide enough accommodation space for the battery 12, and can prevent the battery 12 from being affected by sun, rain, etc., thereby improving the safety and service life of the battery 12. In addition, after the battery 12 is arranged in the box 11, convenience in deployment is improved. In practical application, the box 11 can be arranged at a required installation position according to practical deployment requirements.

In practice, the humidity of the air in the case 11 may be high, and when the temperature of some components (for example, the battery 12 or the inner wall of the case 11) in the case 11 is lower than the temperature of the air in the case 11, moisture in the air may condense on the surfaces of the components, thereby forming condensation. For example, when there is condensation on the outer surface of the battery 12, the condensation may corrode the battery 12 and related electronic devices, and even cause short circuits, which affect the safety and service life of the energy storage device. In addition, when the inner wall of the box 11 has condensation, the condensation can also corrode the box 11, so that the structural strength and reliability of the box 11 can be reduced, and the safety of the energy storage equipment is not guaranteed.

In some current energy storage devices, activated carbon or a dehumidifier is usually placed in the tank 11 to reduce the humidity in the tank 11, but this approach is not conducive to long-term use and increases the maintenance frequency of the energy storage device for workers. In addition, the difficulty and time of maintenance can be significantly increased for energy storage devices deployed in remote areas.

Therefore, the embodiment of the application provides the energy storage equipment capable of effectively preventing the damage of the condensation.

In order to make the objects, technical solutions and advantages of the present application more apparent, the present application will be described in further detail with reference to the accompanying drawings and specific embodiments.

The terminology used in the following embodiments is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used in the specification of this application and the appended claims, the singular forms "a," "an," and "the" are intended to include, for example, "one or more" such forms of expression, unless the context clearly indicates to the contrary. It should also be understood that in the following embodiments of the present application, "at least one" means one, two, or more than two.

Reference in the specification to "one embodiment" or the like means that a particular feature, structure, or characteristic described in connection with the embodiment is included in one or more embodiments of the application. Thus, appearances of the phrases "in one embodiment," "in some embodiments," "in other embodiments," and the like in various places throughout this specification are not necessarily all referring to the same embodiment, but mean "one or more, but not all, embodiments" unless expressly specified otherwise. The terms "comprising," "having," and variations thereof mean "including but not limited to," unless expressly specified otherwise.

As shown in fig. 2 and 3, in one example provided herein, the energy storage device 10 may include a housing 11 and a battery 12 positioned within the housing 11. Also included are a first heating film 13, a first thermometer 14, a second thermometer 15, a hygrometer 16 and a controller (not shown in fig. 2). The first heating film 13 is disposed on the outer surface of the battery 12 and is in heat-conducting contact with the battery 12, so as to heat the battery 12, thereby raising the temperature of the battery 12. The first thermometer 14 is used to detect the temperature of the surface of the battery 12. The second thermometer 15 is used for detecting the temperature of the air in the case 11. The hygrometer 16 is used to detect the humidity of the air in the tank 11. The controller is connected to the first heating film 13, the first thermometer 14, the second thermometer 15 and the hygrometer 16, and is configured to determine that there is a condensation risk when the humidity value detected by the hygrometer 16 is greater than a preset value, the temperature value detected by the first thermometer 14 is less than a first threshold value, and the temperature value detected by the second thermometer 15 is greater than a second threshold value, so that the first heating film 13 can be heated to avoid condensation of water vapor on the surface of the battery 12.

In the example provided in the present application, the temperature of the surface of the battery 12 can be increased as needed by providing the first heating film 13 on the surface of the battery 12, so that condensation of moisture on the surface of the battery 12 can be effectively prevented. The first thermometer 14 can effectively detect the temperature of the battery 12, and the second thermometer 15 can effectively detect the temperature of the air in the case 11. The controller may calculate the temperature difference between the battery 12 and the air in the case 11 based on the temperature values detected by the first thermometer 14 and the second thermometer 15. In addition, it is possible to determine whether or not there is a risk of condensation on the surface of the battery 12 based on the humidity value of the air detected by the hygrometer 16. When there is a risk of condensation, the controller may control the first heating film 13 to heat to raise the temperature of the battery 12, so that the temperature difference between the battery 12 and the air in the case 11 may be reduced to prevent condensation of moisture on the surface of the battery 12.

In addition, when the device is specifically applied, the controller can also upload the frequency information reaching the condensation condition to the monitoring equipment, and present the frequency information to the user through the monitoring equipment so as to remind the user to pay attention to improve the environmental temperature and humidity conditions, thereby reducing the occurrence of the condensation condition.

The first heating film 13 may be of a type which is currently more commonly used.

For example, as shown in fig. 4, the first heating film 13 may include a film layer 131 and a resistance wire 132 positioned in the film layer 131, and when a current flows through the resistance wire 132, the resistance wire 132 is heated, thereby implementing a heating function.

In practical application, the type of the first heating film 13 can be flexibly selected according to practical requirements, which is not limited in the present application.

In addition, the controller may be provided separately from the battery 12 or may be a battery management system (battery management system, BMS) in the energy storage system 10, which is not limited in this application. In addition, in some batteries 12, there may be a built-in thermometer, and thus, the first thermometer 14 may be omitted from the arrangement at the time of actual use.

In practical situations, the generation of condensation is determined by various factors. For example, in the energy storage device 10, the temperature, humidity (i.e., relative humidity) of the air within the housing 11 and the temperature of the battery 12 are all major factors in determining the formation of condensation.

Generally, the greater the humidity of the air, the more likely condensation will occur. For example, when the temperature of the air is 27 ℃, the temperature of the battery 12 is 23 ℃, and the humidity of the air is 90%, condensation occurs on the surface of the battery 12. When the air humidity was reduced to 30%, the air temperature was still 27 ℃, and the temperature of the battery 12 was still 23 ℃, no condensation was generated.

In addition, when the temperature difference between the battery 12 and the air is larger, the condensation is more likely to occur under the condition that the air humidity is not changed, and the description thereof will be omitted.

In general, condensation may occur in a high humidity environment with a small temperature difference. In the case of a large temperature difference, condensation may occur even in the case of a small air humidity. Thus, the conditions under which condensation occurs are not the only ones.

In actual use, the workflow of the energy storage device may be as shown in fig. 5.

Specifically, the first thermometer 14 detects the temperature of the battery surface, and the second thermometer 15 and hygrometer 16 detect the temperature and humidity of the air. The controller judges whether or not the condensation condition is reached based on the detection information of the first thermometer 14, the second thermometer 15 and the hygrometer 16. If it is determined that the condensation condition is reached, the first heating film 13 is started to heat. If it is judged that the condensation condition is not reached, the heating of the first heating film 13 is stopped.

The condensation condition may specifically be: the humidity value detected by the hygrometer 16 is greater than a preset value, the temperature value detected by the first thermometer 14 is less than a first threshold value, and the temperature value detected by the second thermometer 15 is greater than a second threshold value.

In the examples provided herein, specific values of the environmental conditions and condensation conditions of the energy storage device 10 will be set below in order to facilitate understanding of the technical solutions of the present application. It is assumed that under normal conditions the air humidity of the environment in which the energy storage device 10 is located is 80% and the air temperature is 27 ℃. Namely, the humidity of the air in the case 11 is about 80% and the air temperature is about 27 ℃. When the temperature of the battery 12 is about 20 ℃, water vapor condenses on the surface of the battery 12 to form condensation. When the temperature of the battery 12 rises to about 24 ℃, the condensation phenomenon disappears.

Based on this, in the energy storage device 10 provided in the present application, the above-described preset value may be set to 80%, the first threshold value may be set to 20 ℃, and the second threshold value may be set to 27 ℃. That is, the controller is used to heat the first heating film 13 to avoid condensation of moisture on the surface of the battery 12 when the humidity value detected by the hygrometer 16 is greater than 80%, the temperature value detected by the first thermometer 14 is less than 20 ℃, and the temperature value detected by the second thermometer 15 is greater than 27 ℃.

In addition, when the temperature of the battery 12 is raised to about 24 ℃, the condensation phenomenon disappears. Therefore, in practical use, the controller is configured to stop heating the first heating film 13 when the temperature value detected by the first thermometer 14 is greater than a third threshold (e.g., 24 ℃), so that electric power can be effectively saved.

It should be noted that the above setting is only for facilitating understanding of the technical solution of the present application, and the technical solution of the present application is not limited. In practical application, conditions for judging whether the first heating film 13 is heated or stopped may be set appropriately according to practical situations, which is not limited in this application.

In the specific setting, the shape, size and setting position of the first heating film 13 can be flexibly selected according to actual demands.

As shown in fig. 2 and 6, in one example provided herein, the battery 12 has a first side 12a and a second side 12b disposed away from each other, and the first heating film 13 is disposed on the first side 12a and the second side 12b. Wherein the areas of the first side 12a and the second side 12b are substantially the same.

The battery 12 may be composed of a plurality of cells arranged in sequence.

For example, as shown in fig. 2 and 6, in an example provided in the present application, the battery 12 includes five electric cells 121, and the five electric cells 121 are sequentially arranged along a first direction, where the first direction is a thickness direction of the electric cells 121.

As shown in fig. 7, each of the cells 121 has a rectangular block structure in shape, having a top surface 121a, a bottom surface 121b, a side surface 121c, a side surface 121d, a side surface 121e, and a side surface 121f. Wherein the top surface 121a has a positive electrode and a negative electrode, and the

side surfaces

121e and 121f have a larger area, which provides a larger contact area. Therefore, in practical application, the plurality of electric cells may be sequentially arranged along the direction perpendicular to the side 121e (or the side 121 f), so that a larger contact area is provided between two adjacent electric cells 121, which is beneficial to improving the stress intensity of the battery 12.

The side surfaces 121d of the plurality of cells 121 may collectively constitute the first side surface 12a of the battery 12, and the side surfaces 121c of the plurality of cells 121 may collectively constitute the second side surface of the battery 12b.

It will be appreciated that the first heating film 13 may be provided on other sides of the battery 12 for specific applications. In specific application, the setting position of the first heating film 13 may be set reasonably according to actual requirements, which is not described herein.

In addition, as shown in fig. 8, in one example provided herein, a moisture absorption layer 130 may be provided on the surface of the first heating film 13 facing away from the battery 12. On the one hand, the moisture in the air can be effectively absorbed by the moisture absorption layer 130, so that the humidity of the air in the box 11 is reduced, and the probability of condensation is reduced. On the other hand, when the condensation is generated, the moisture absorption layer 130 can absorb the condensation effectively, so that damage to the battery 12 caused by the condensation can be avoided.

Specifically, in actual situations, the greater the humidity of the air, the more likely the condensation will occur, and therefore, in the example provided in the present application, moisture in the air may be effectively absorbed by the moisture absorption layer 130, so that the humidity of the air in the case 11 may be reduced. For example, in rainy days, the humidity of the air in the case 11 may become high, and the moisture absorption layer 130 may effectively absorb moisture in the air, thereby reducing the generation of condensation. In addition, when the weather becomes sunny and the humidity of the air becomes small, the moisture in the moisture absorption layer 130 can be naturally dispersed, so that the moisture absorption capacity can be recovered, and the reliability in long-term use can be ensured.

Of course, in practical applications, the moisture absorbing layer 130 may be covered with the surface of the first heating film 13 facing away from the battery 12, or may be locally disposed on the surface.

In addition, in practical situations, the condition of generating the condensation is not unique, so that an error may occur in the calibration of the working condition of the first heating film 13 in the controller by the user, and the first heating film 13 may start to heat after the condensation is generated in the case 11. In the example provided herein, the moisture absorption layer 130 may effectively absorb the condensation, so that the condensation generated on the surface of the battery 12 may be reduced or avoided, and thus the damage of the condensation to the battery 12 may be reduced. In addition, after the first heating film 13 is heated, the condensation in the moisture absorption layer 130 can be effectively dispersed, thereby recovering the moisture absorption capability and ensuring the reliability in long-term use.

In practical applications, the air in the case 11 may be in communication with the air in the external environment, and thus, the humidity and temperature of the air in the case 11 may change with the change of the external environment.

In addition, in practical applications, there is a possibility that condensation may occur on the inner wall of the case 11, and when condensation occurs on the inner wall of the case 11, corrosion may occur on the case 11, thereby reducing the structural strength of the case 11.

For example, in the early morning, the air temperature gradually increases, and the temperature of the battery 12 increases relatively slowly. When the temperature of the battery 12 is large with respect to the temperature of the air in the case 11, dew is easily generated on the surface of the battery 12. In addition, at the evening, the temperature gradually decreases, and since the temperature of the tank 11 decreases relatively quickly, condensation is likely to occur on the inner wall of the tank 11 when the temperature difference between the temperature of the tank 11 and the air in the tank 11 is large.

Thus, as shown in fig. 9 and 10, in one example provided herein, the energy storage device 10 may further include a second heating film 17 and a third thermometer 18. The second heating film 17 is provided on the inner wall of the case 11 and is in heat conductive contact with the case 11. The third thermometer 18 is used for detecting the temperature of the inner wall of the box 11, the controller is also connected with the second heating film 17 and the third thermometer 18, and the controller is used for heating the second heating film 17 when the humidity value detected by the hygrometer 16 is larger than a preset value, the temperature value detected by the third thermometer 18 is smaller than a fourth threshold value, and the temperature value detected by the second thermometer 15 is larger than a second threshold value.

In the example provided in the present application, the temperature of the inner wall of the tank 11 can be increased as needed by providing the second heating film 17 on the inner wall of the tank 11, so that condensation of moisture on the inner wall of the tank 11 can be effectively prevented. The temperature of the inner wall of the case 11 can be effectively detected by the third thermometer 18, and the temperature of the air in the case 11 can be effectively detected by the second thermometer 15. The controller may calculate the temperature difference between the inner wall of the cabinet 11 and the air in the cabinet 11 based on the temperature values detected by the third thermometer 18 and the second thermometer 15. In addition, it is possible to determine whether or not there is a risk of condensation on the inner wall of the case 11 based on the humidity value of the air detected by the hygrometer 16. When there is a condensation risk, the controller may control the second heating film 17 to heat to raise the temperature of the inner wall of the tank 11, so that the temperature difference between the inner wall of the tank 11 and the air in the tank 11 may be reduced to prevent condensation of moisture on the inner wall of the tank 11.

When the temperature of the inner wall of the case 11 is raised to a certain temperature (e.g., about 24 ℃), the condensation will disappear. Therefore, in practical use, the controller is configured to stop heating the second heating film 17 when the temperature value detected by the third thermometer 18 is greater than the fifth threshold (e.g., 24 ℃), so that electric power can be effectively saved.

It will be appreciated that, in practical application, the type and working conditions of the second heating film 17 may be the same as those of the first heating film 13 described above, and will not be described here.

In addition, in practical applications, a moisture absorption layer may be disposed on the surface of the second heating film 17 facing away from the case 11. On the one hand, the moisture absorption layer can effectively reduce the humidity of the air in the box 11, so that the probability of condensation can be reduced. On the other hand, after the condensation is generated, the moisture absorption layer can effectively absorb the condensation, so that the damage of the condensation to the inner wall of the box 11 can be avoided.

Of course, in practical applications, the moisture-absorbing layer may be covered with the surface of the second heating film 17 facing away from the case 11, or may be locally disposed on the surface.

In a specific arrangement, the moisture-absorbing layer may be made of silica gel, silicon dioxide, or other materials, and the specific materials of the moisture-absorbing layer are not limited in this application.

In practice, the energy storage device 10 may be used in home energy storage, industrial energy storage, data center, vehicles, etc. for storing and releasing electrical energy.

For example, as shown in fig. 11, an embodiment of the present application further provides an energy storage system, which may include an inverter and the energy storage device described above. The inverter is electrically connected to the battery 12 in the energy storage device for converting the ac power to dc power and providing the dc power to the battery 12, or converting the dc power from the battery 12 to ac power.

Alternatively, as shown in fig. 12, there is further provided a power station according to an embodiment of the present application, which may include a power generation device and the energy storage device described above. The power generation device is electrically connected with a battery in the energy storage device, and the power generation device is used for storing generated electric energy into the battery. By applying the battery, the safety of the power station can be effectively improved, and the deployment difficulty is reduced.

The power generation device may be a photovoltaic power generation device, a wind power generation device, or the like, as the specific application, the specific type of the power generation device is not limited in this application. In addition, in practical application, the power generation equipment and the battery can be connected through the power distribution cabinet. The power distribution cabinet can comprise a direct current-alternating current conversion device or a transformer and the like, so that electric energy generated by the power generation equipment can be effectively transmitted to a battery for storage. In the specific setting, the quantity and the type of the devices in the power distribution cabinet can be reasonably set according to actual demands, and the application is not limited in this way.

Alternatively, as shown in fig. 13, the embodiment of the application further provides a charging device, which includes a charging pile and the energy storage device. The power in the energy storage device may be charged to a powered device (e.g., a vehicle) through a charging stake. Alternatively, the energy in the grid may be charged to the energy storage device via the charging stake.

Specifically, in one example provided herein, a charging pile may include an alternating current-direct current (AC-DC) converter and a direct current-direct current (DC-DC) converter. The power grid is connected with the energy storage device through the AC-DC converter, and the AC-DC converter can convert alternating current in the power grid into direct current and then provide the direct current for the energy storage device to store energy.

The energy storage device can be connected with the power receiving device (such as a vehicle) through the direct current-direct current converter, and the DC-DC conversion device can supply the voltage of the direct current to the power receiving device after boosting or reducing the voltage, so that the actual requirement of the power receiving device on the charging power is met.

In practical application, when the electric quantity in the energy storage device is sufficient and the power receiving device has a charging demand, the electric energy in the energy storage device can be preferentially used for charging the power receiving device. When the electric quantity in the energy storage equipment is lower and the power receiving equipment has a charging demand, the power in the power grid can be directly utilized to charge the power receiving equipment, so that adverse effects on the charging effect of the power receiving equipment are avoided. When the powered device is charged, the electric energy in the power grid can be provided for the energy storage device to store energy.

Of course, during practical application, the distribution condition of the electric energy can be reasonably adjusted according to different electricity consumption requirements, which is not described herein.

In addition, in a possible embodiment, the charging device may further include a power generation device, and the power generation device may be connected to the energy storage device through a DC-DC converter. The DC-DC converter may boost or buck the voltage of the direct current generated by the power generation device and provide the boosted or stepped down voltage to the energy storage device. The power generation equipment can be photovoltaic power generation equipment, wind power generation equipment and the like, and the specific type of the power generation equipment is not limited.

Wherein the grid and the power generation device may exist at the same time, or may include only the power generation device.

In practical applications, the electric energy in the power generation facility may be used preferentially. For example, a power generation plant is exemplified as a photovoltaic power generation plant. When the generated energy of the power generation equipment is sufficient (such as under a sunny condition), the energy storage equipment can store the electric energy generated by the power generation equipment preferentially, so that the efficient utilization of clean energy is realized.

When the generated energy of the power generation equipment is low (such as in continuous overcast and rainy days), and the electric quantity of the energy storage equipment is low, the electric energy in the power grid can be provided for the energy storage equipment to store energy.

Of course, in practical application, the distribution condition of the electric energy can be reasonably adjusted according to different electricity requirements, which is not described herein.

In addition, in some examples, a circuit breaker, overload protection circuit, etc. may also be included in the charging stake. When overload, short circuit and the like occur in the circuit, the circuit breaker can cut off the passage of current so as to protect energy storage equipment, powered equipment and lines.

In practical application, the number and types of devices included in the charging pile can be reasonably set according to practical requirements, and are not described herein.

The foregoing is merely specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily think about changes or substitutions within the technical scope of the present application, and the changes or substitutions are intended to be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. An energy storage device comprising a housing and a battery positioned within the housing, further comprising:

the first heating film is arranged on the outer surface of the battery and is in heat conduction contact with the battery;

the first thermometer is arranged in the box body and is used for detecting the temperature of the battery;

the second thermometer is arranged in the box body and is used for detecting the temperature of air in the box body;

the hygrometer is arranged in the box body and used for detecting the humidity of air in the box body;

a controller connected to the first heating film, the first thermometer, the second thermometer, and the hygrometer;

the controller is used for heating the first heating film when the humidity value detected by the hygrometer is larger than a preset value, the temperature value detected by the first thermometer is smaller than a first threshold value, and the temperature value detected by the second thermometer is larger than a second threshold value.

2. The energy storage device of claim 1, wherein the controller is further configured to stop heating the first heating film when the temperature value detected by the first thermometer is greater than a third threshold.

3. The energy storage device of claim 1 or 2, further comprising a second heating film and a third thermometer;

the second heating film is arranged on the inner wall of the box body and is in heat conduction contact with the box body;

the third thermometer is used for detecting the temperature of the inner wall of the box body;

the controller is also connected with the second heating film and the third thermometer;

the controller is used for heating the second heating film when the humidity value detected by the hygrometer is larger than a preset value, the temperature value detected by the third thermometer is smaller than a fourth threshold value and the temperature value detected by the second thermometer is larger than a second threshold value.

4. The energy storage device of claim 3, wherein the controller is further configured to stop heating the second heating film when the temperature value detected by the third thermometer is greater than a fifth threshold.

5. The energy storage device of any of claims 1-4, wherein at least a portion of an outer surface of the first heating film has a moisture absorbing layer.

6. The energy storage device of claim 3 or 4, wherein at least a portion of an outer surface of the second heating film has a moisture absorbing layer.

7. The energy storage device of any of claims 1-6, wherein the battery has a first side and a second side disposed away from each other, the first heating film disposed on the first side and the second side;

wherein the first side and the second side are the largest of the battery outer surfaces.

8. An energy storage system comprising an inverter and an energy storage device;

the energy storage equipment includes the box and is located battery in the box still includes:

the controller is used for heating the first heating film when the humidity value detected by the hygrometer is larger than a preset value, the temperature value detected by the first thermometer is smaller than a first threshold value, and the temperature value detected by the second thermometer is larger than a second threshold value;

the inverter is electrically connected with the battery and is used for converting alternating current into direct current and then providing the direct current for the battery, or converting direct current from the battery into alternating current.

9. The energy storage system of claim 8, wherein the energy storage device further comprises a second heating film and a third thermometer;

10. A power station comprising a power generation device and an energy storage device;

the power generation device is electrically connected with the battery, and is used for storing generated electric energy into the battery.

11. The power plant of claim 10, wherein the energy storage device further comprises a second heating film and a third thermometer;

12. The charging equipment is characterized by comprising a charging pile and energy storage equipment;

the charging pile is electrically connected with the battery, and the battery is used for providing electric energy for the charging pile.

13. The charging apparatus according to claim 12, wherein the charging pile comprises at least one of an ac-dc converter, a dc-dc converter;

the charging pile is used for providing electric energy in a power grid for the energy storage equipment and also used for providing electric energy in the energy storage equipment for the power receiving equipment.

14. The charging device of claim 13, further comprising a power generation device coupled to the charging post for providing the generated electrical energy to the energy storage device.

15. The charging device of any one of claims 12 to 14, wherein the energy storage device further comprises a second heating film and a third thermometer;