Energy storage box body, energy storage system and heat treatment method

Abstract

The invention relates to the technical field of energy storage equipment, and particularly discloses an energy storage box body, an energy storage system and a heat treatment method.The energy storage box body comprises a box body and a control unit, a battery bin and a PCS bin are arranged in the box body, a battery module is installed in the battery bin, an energy storage converter is installed in the PSC bin, and the control unit is connected with the PCS bin. The first air guide piece and the heat exchange air opening which are used for communicating the battery bin and the PCS bin are arranged between the battery bin and the PCS bin, heat in the PCS bin can be conveyed into the battery bin through the first air guide piece, heat utilization of the battery bin is achieved, and the heat exchange air opening is arranged so that gas in the battery bin can enter the PCS bin conveniently; therefore, the gas in the battery bin and the PCS bin can be smoothly circulated, the purpose of heat exchange is achieved, combined heat dissipation or independent heat dissipation of the PCS bin and the battery bin can be achieved through control over the heat dissipation air openings of the PCS bin and the battery bin by the control unit, multiple modes can be switched, the heat utilization efficiency can be improved, and auxiliary electricity consumption is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of energy storage equipment, and in particular to an energy storage box, an energy storage system and a heat treatment method. Background Art

[0002] With the rapid development of the new energy industry, energy storage systems, as an important link in energy conversion and regulation, play an increasingly important role in the power system. Household storage systems, as a type of energy storage system, are usually used in homes or small buildings. The temperature of their operating environment is affected by the regional temperature. However, due to regional and seasonal differences, the operating environment temperature varies greatly. High temperature will affect the performance of the entire equipment and even lead to safety accidents. Low temperature will also affect the performance and life of the battery module.

[0003] In the prior art, household energy storage systems include energy storage inverters and battery modules. Since the energy storage inverters emit a large amount of heat, to prevent the heat from affecting the battery modules, two isolated chambers are usually provided in a box. The energy storage inverters and battery modules are placed in the two chambers respectively, and heat dissipation structures are separately provided in the two chambers. However, this method has the following disadvantages:

[0004] 1. In a low-temperature environment, the battery module is always in a low-temperature state, which will lead to poor performance and short service life of the battery module. The use of additional electric heating devices will lead to low energy utilization efficiency and the inability to effectively utilize the heat generated inside the system.

[0005] Second, the heat generated by the energy storage converter is directly discharged outside the box, and the heat cannot be effectively utilized, resulting in ineffective heat loss;

[0006] 3. Under any ambient temperature, it dissipates heat independently, which will cause auxiliary power consumption of the system and has a low level of intelligence. Summary of the Invention

[0007] The present invention has been made in consideration of the above-mentioned problems. The purpose of the invention is to provide an energy storage system, an energy storage system and a heat treatment method, which can realize the heat exchange between the heat in the PCS compartment and the heat in the battery compartment, thereby ensuring the operating temperature of the battery module in the battery compartment and reducing the loss. The heat dissipation method can be adjusted in real time according to the ambient temperature, thereby reducing the consumption of auxiliary power.

[0008] To achieve the above objectives, the present invention provides an energy storage box, comprising:

[0009] The box body is provided with a battery compartment and a PCS compartment, a first air guide and a heat exchange vent for connecting the two compartments are provided between the two compartments, the battery compartment is provided with a first heat dissipation vent, the PCS compartment is provided with a second heat dissipation vent, and the heat exchange vent, the first heat dissipation vent, and the second heat dissipation vent are all provided with a control switch;

[0010] A control unit is electrically connected to the first air guide member and the plurality of control switches; wherein,

[0011] The control unit controls the first air guide to rotate in a first direction and the heat exchange vent to open, so as to achieve heat exchange between the battery compartment and the PCS compartment; or

[0012] The control unit controls the first air guide to rotate in a second direction and the second heat dissipation vent to open, so as to achieve joint heat dissipation of the battery compartment and the PCS compartment; or

[0013] The control unit controls the first heat dissipation vent and / or the second heat dissipation vent to open, so as to achieve separate heat dissipation of the battery compartment and the PCS compartment.

[0014] According to the energy storage box described above, when the first guide member rotates along the first direction, it is used to transport the gas in the PCS compartment to the battery compartment; when the first guide member rotates along the second direction, it is used to transport the gas in the battery compartment to the PCS compartment.

[0015] According to the energy storage box described above, a partition is provided between the battery compartment and the PCS compartment, the first guide member is configured as a first fan, the first fan and the heat exchange air outlet are respectively arranged at both ends of the partition, and the second heat dissipation air outlet is arranged on the side of the PCS compartment close to the heat exchange air outlet.

[0016] According to the energy storage box described above, the battery compartment is further provided with a first air inlet, the first air inlet is arranged on a side of the battery compartment close to the first fan, and the control switch electrically connected to the control unit is provided in the first air inlet;

[0017] The two first heat dissipation vents are symmetrically arranged at the bottom of the battery compartment, and a second fan is provided in each of the two first heat dissipation vents. The second fan is electrically connected to the control unit.

[0018] According to the energy storage box described above, the PCS compartment is further provided with a heat dissipation fin, a third fan and a second air inlet, the heat dissipation fin is arranged on the back of the PCS compartment, the third fan is located on one side of the heat dissipation fin and is electrically connected to the control unit;

[0019] The second air inlet is located at the top of the PCS compartment, and the control switch electrically connected to the control unit is provided in the second air inlet.

[0020] The energy storage box described above further includes a temperature sensor, which is used to detect the ambient temperature and is electrically connected to the control unit.

[0021] According to the above-mentioned energy storage box, it also includes a cover, a PCS sealing plate and a battery sealing plate. The box is provided with an opening, the cover is detachably arranged at the opening, the PCS sealing plate is located at the opening of the PCS compartment, and the battery sealing plate is located at the opening of the battery compartment.

[0022] An energy storage system, comprising:

[0023] The energy storage box as described above;

[0024] a battery module, which is arranged in the battery compartment;

[0025] The energy storage converter is arranged in the PCS compartment.

[0026] A heat treatment method for an energy storage system, the energy storage system comprising an energy storage box, the energy storage box comprising a box body, a control unit, and a temperature sensor, a battery compartment and a PCS compartment being provided in the box body, a first fan and a heat exchange vent being provided between the battery compartment and the PCS compartment for connecting the battery compartment and the PCS compartment, the battery compartment being provided with a first heat dissipation vent, a first air inlet, and a second fan located within the first heat dissipation vent, the PCS compartment being provided with a second heat dissipation vent, a second air inlet, heat dissipation fins, and a third fan, the first heat dissipation vent, the first air inlet, the second heat dissipation vent, and the second air inlet being each provided with a control switch electrically connected to the control unit, and the first fan, the second fan, and the third fan being electrically connected to the control unit; the method comprising the steps of:

[0027] S1: Detects the ambient temperature through the temperature sensor and feeds the temperature back to the control unit;

[0028] S2: The control unit determines the working mode based on the analysis and judgment of the ambient temperature;

[0029] S3: The control unit sends control instructions to the first fan, heat exchange air outlet, first heat dissipation air outlet, first air inlet, second fan, second heat dissipation air outlet, second air inlet and third fan according to the corresponding working mode for independent or joint control to achieve heat exchange between the battery compartment and the PCS compartment or joint heat dissipation of the battery compartment and the PCS compartment or separate heat dissipation of the battery compartment and the PCS compartment.

[0030] According to the above-mentioned heat treatment method of an energy storage system, in step S2, the steps are as follows:

[0031] S21: Dividing the ambient temperature into a first preset temperature section, a second preset temperature section, a third preset temperature section, a fourth preset temperature section, and a fifth preset temperature section, wherein the fifth preset temperature section>the fourth preset temperature section>the third preset temperature section>the second preset temperature section>the first preset temperature section;

[0032] S22: Determine the working mode based on the analysis and judgment of the ambient temperature, including:

[0033] Mode 1: When the ambient temperature is within the first preset temperature range, the first fan is controlled to rotate in the first direction and the heat exchange vent is opened. The first fan and the heat exchange vent cooperate to form an internal circulation, transferring the hot air in the PCS compartment to the battery compartment.

[0034] Mode 2: When the ambient temperature is within the second preset temperature range, the first fan is controlled to rotate in the first direction, and the heat exchange air vents and the second heat dissipation air vents are opened. The first fan and the heat exchange air vents cooperate to form a circulation and dissipate heat for the PCS compartment.

[0035] Mode 3: When the ambient temperature is within the third preset temperature range, the second heat dissipation vent is controlled to open to dissipate heat from the PCS compartment;

[0036] Mode 4: When the ambient temperature is within the fourth preset temperature range, the first fan is controlled to rotate in the second direction, and the first air inlet, the second heat dissipation outlet, and the third fan are turned on to jointly dissipate heat for the battery compartment and the PCS compartment.

[0037] Mode 5: When the ambient temperature is within the fifth preset temperature range, the second fan, the first air inlet, the first heat dissipation vent, the third fan, the second air inlet, and the second heat dissipation vent are all turned on, and the first fan and the heat exchange vent are turned off to dissipate heat for the battery compartment and the PCS compartment separately.

[0038] The present invention has the following beneficial effects:

[0039] 1. A first fan and a heat exchange vent are provided between the battery compartment and the PCS compartment to connect the two compartments. The first fan and the heat exchange vent can realize heat exchange between the PCS compartment and the battery compartment. Under low temperature conditions, the heat in the PCS compartment can be fully utilized to increase the heat in the battery compartment, thereby ensuring that the battery module operates at a more suitable temperature, reducing electric heating energy consumption and improving energy utilization efficiency.

[0040] 2. It can achieve full-scenario coverage from waste heat recovery to independent heat dissipation, significantly improving the overall thermal management efficiency of the system and extending the service life of the battery module;

[0041] 3. The first fan can switch between heating and cooling through bidirectional operation, with a simple structure and simplified system complexity;

[0042] 4. In the third preset temperature range, the PCS warehouse relies only on natural heat dissipation to minimize the consumption of auxiliary power. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] Figure 1 This is an exploded diagram of the overall structure of the energy storage system of the embodiment;

[0044] Figure 2 2. It is a schematic diagram of the internal structure of the box body of the embodiment;

[0045] Figure 3 It is a schematic structural diagram of the back side of the box body of the embodiment.

[0046] In the picture:

[0047] 100, energy storage box; 110, box body; 111, battery compartment; 111a, first cooling vent; 111b, first air inlet; 111c, second fan; 112, PCS compartment; 112a, second cooling vent; 112b, cooling fins; 112c, third fan; 112d, second air inlet; 113, partition; 113a, heat exchange vent; 113b, first fan; 120, cover; 130, PCS sealing plate; 140, battery sealing plate;

[0048] 200. Battery module;

[0049] 300. Energy storage converter. DETAILED DESCRIPTION

[0050] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solutions of the present invention, but the present invention is not limited to these embodiments.

[0051] like Figure 1-3 As shown, an energy storage system includes an energy storage box 100, a battery module 200 and an energy storage inverter 300. The battery module 200 and the energy storage inverter 300 are both located in the energy storage box 100. The energy storage inverter 300 will emit a large amount of heat during operation. In this embodiment, the heat emitted by the energy storage inverter 300 can be used to increase the ambient temperature of the battery module 200 to prevent low temperature from affecting the normal operation of the battery module 200. The battery module 200 and the energy storage inverter 300 can be jointly cooled or cooled separately to meet various needs and reduce energy consumption.

[0052] Specifically, an energy storage box includes a box body 110 and a control unit, wherein a battery compartment 111 and a PCS compartment 112 are provided in the box body 110, a battery module 200 is installed in the battery compartment 111, and an energy storage inverter 300 is installed in the PSC compartment, and a first air guide for connecting the two compartments and a heat exchange air outlet 113a are provided between the battery compartment 111 and the PCS compartment 112. The heat in the PCS compartment 112 can be transported to the battery compartment 111 through the first air guide to realize its heat utilization. The existence of the heat exchange air outlet 113a is to facilitate the gas in the battery compartment 111 to enter the PCS compartment 112, thereby ensuring that the gas in the battery compartment 111 and the PCS compartment 112 can circulate smoothly to achieve the purpose of heat exchange.

[0053] Of course, in this embodiment, a first heat dissipation vent 111a is provided on the battery compartment 111, and a second heat dissipation vent 112a is provided on the PCS compartment 112. The first heat dissipation vent 111a is used for dissipating heat from the battery compartment 111, and the second heat dissipation vent 112a is used for dissipating heat from the PCS compartment 112. A control switch is provided in the heat exchange vent 113a, the first heat dissipation vent 111a and the second heat dissipation vent 112a. The control switch is used to control the independent opening and closing of multiple vents such as the heat exchange vent 113a, the first heat dissipation vent 111a and the second heat dissipation vent 112a. The control unit is electrically connected to the first air guide and the multiple control switches. The control unit can control whether the first air guide moves and the direction of movement, and can control the opening and closing of multiple vents individually.

[0054] Specifically, it has three control modes according to the ambient temperature. One is that the control unit controls the first air guide to rotate along the first direction and the heat exchange air outlet 113a is opened. At this time, the first air guide can transport the hot air in the PCS compartment 112 to the battery compartment 111, and the gas in the battery compartment 111 is squeezed into the PCS compartment 112 from the heat exchange air outlet 113a to achieve heat exchange between the battery compartment 111 and the PCS compartment 112, that is, the heat in the PCS compartment 112 is used to heat the temperature in the battery compartment 111; the second is that the control unit controls the first air guide to rotate along the second direction and the second heat dissipation air outlet 112a is opened. When the first air guide rotates along the second direction, it can input the gas in the battery compartment 111 into the PCS compartment 112, which will accelerate the battery The gas flow rate in the compartment 111 uniformly distributes the temperature of the battery module 200 in the battery compartment 111. At the same time, when the gas flows in the PCS compartment 112, it can dissipate heat for the energy storage inverter 300, and discharge the heated gas from the second heat dissipation vent 112a, thereby achieving joint heat dissipation of the battery compartment 111 and the PCS compartment 112. Thirdly, the control unit controls the opening of the first heat dissipation vent 111a and / or the second heat dissipation vent 112a, that is, the first heat dissipation vent 111a and the second heat dissipation vent 112a are opened simultaneously or separately, thereby achieving separate heat dissipation of the battery compartment 111 and the PCS compartment 112, that is, the battery compartment 111 and the PCS compartment 112 can be cooled separately or together, and can be selected according to actual needs to reduce auxiliary power consumption.

[0055] In this embodiment, by individually controlling a plurality of air vents, the energy storage box 100 can switch between multiple heat exchange and heat dissipation modes, thereby meeting the requirements for the energy storage system to operate under different ambient temperatures while reducing energy consumption and saving costs.

[0056] In order to define the conveying direction, when the first guide member rotates along the first direction, it is used to convey the gas in the PCS compartment 112 to the battery compartment 111; when the first guide member rotates along the second direction, it is used to convey the gas in the battery compartment 111 to the PCS compartment 112. In this embodiment, the first direction refers to the clockwise direction, and the second direction refers to the counterclockwise direction. The direction of the airflow can be reversed by adjusting the steering of the first guide member, and the heat exchange and combined heat dissipation functions can be switched, which can simplify the overall structure and reduce the structural complexity.

[0057] In this embodiment, a partition 113 is provided between the battery compartment 111 and the PCS compartment 112, and the partition 113 is used to separate the PCS compartment 112 from the battery compartment 111. The first guide member is set to a first fan 113b, and the first fan 113b and the heat exchange air outlet 113a are respectively arranged at both ends of the partition 113. When the first fan 113b and the heat exchange air outlet 113a work at the same time, the movement path of the airflow can be increased, thereby improving the heat exchange effect. Among them, the first fan 113b can set the inclination angle of the blade, and according to its inclination angle, it can realize its forward and reverse rotation to guide the airflow in different directions.

[0058] Therein, two channels need to be provided on the partition 113 , one of which is used as the heat exchange air outlet 113 a , and the other is used for installing the first fan 113 b .

[0059] In the above control modes, such as the first control mode, if the temperature of the PCS compartment 112 still exceeds the preset temperature range after heat exchange in the battery compartment 111, the PCS needs to further dissipate heat, and the second heat dissipation vent 112a needs to be opened synchronously. Therefore, the second heat dissipation vent 112a can be arranged on the side of the PCS compartment 112 close to the heat exchange vent 113a. When the first fan 113b rotates clockwise, the heat exchange vent 113a discharges the heat-exchanged gas into the PCS compartment 112. Since the second heat dissipation vent 112a is open at this time, the gas can be discharged from the second heat dissipation vent 112a, thereby further dissipating the heat of the PCS compartment 112. While achieving heat exchange, further heat dissipation of the PCS compartment 112 can be achieved.

[0060] In order to ensure the stability of the air pressure in the battery compartment 111, a first air inlet 111b is further provided on the battery compartment 111. The first air inlet 111b is arranged on a side of the battery compartment 111 close to the first fan 113b, and a control switch connected to the electrical signal of the control unit is provided in the first air inlet 111b. When the first fan 113b rotates counterclockwise and when the battery compartment 111 is dissipating heat alone, the first air inlet 111b needs to be opened to achieve air pressure balance in the battery compartment 111.

[0061] Among them, the two first heat dissipation vents 111a are symmetrically arranged at the bottom of the battery compartment 111, and the two first heat dissipation vents 111a are each provided with a second fan 111c, and the second fan 111c is electrically connected to the control unit. When the battery compartment 111 is heat-dissipated separately, the second fan 111c rotates to drive the gas in the battery compartment 111 to be discharged outside the battery compartment 111. At this time, the first air inlet 111b is in an open state, ensuring the air pressure balance in the battery compartment 111, and at the same time bringing the heat out of the battery compartment 111 through gas flow.

[0062] In order to further enhance the heat dissipation effect of the PCS bin 112, a heat dissipation fin 112b, a third fan 112c and a second air inlet 112d are also provided on the PCS bin 112. The heat dissipation fin 112b is arranged on the back of the PCS bin 112. Its main material is heat-conducting material. It is connected to the energy storage inverter 300, and then the heat is conducted to the heat dissipation fin 112b. When the third fan 112c is turned on, the high-temperature air from the heat dissipation fin 112b can be discharged to the outside of the PCS bin 112 to meet the heat dissipation requirements of the PCS bin 112 under high temperature conditions. Among them, the second air inlet 112d is to balance the air pressure in the PCS bin 112 and form an airflow. That is, when the PCS bin 112 is dissipating heat alone, whether the hot air is discharged from the second heat dissipation vent 112a or the third fan 112c, the second air inlet 112d needs to be in the open state to provide gas for the PCS bin 112 and form a circulating airflow to achieve the heat dissipation effect.

[0063] Of course, in this embodiment, the energy storage box 100 also includes a temperature sensor, which is used to detect the ambient temperature and adjust the various air vents and fans on the box body 110 according to the ambient temperature to perform heat exchange or heat dissipation. Therefore, the temperature sensor is electrically connected to the control unit to achieve control of the various fans and air vents.

[0064] In this embodiment, the control unit includes a control module and an execution module. The control module is used to receive the temperature signal transmitted by the temperature sensor, analyze and judge it, and transmit the control signal to the execution module. The execution module then sends a control signal to act on the control switches of each air outlet and each fan to control them to perform corresponding actions.

[0065] The energy storage box 100 also includes a cover 120, a PCS sealing plate 130 and a battery sealing plate 140. The box is provided with an opening, and the cover 120 is detachably arranged at the opening. The cover is used to seal the entire box body 110, and the PCS sealing plate 130 is located at the opening of the PCS compartment 112. The battery sealing plate 140 is located at the opening of the battery compartment 111, and is used to seal the PCS compartment 112 and the battery compartment 111 respectively to prevent heat from being transferred between the two compartments at will, thereby avoiding the high temperature of the PCS compartment 112 affecting the normal operation of the battery module 200.

[0066] Specifically, a heat treatment method for an energy storage system includes the following steps:

[0067] S1: Detect the ambient temperature through the temperature sensor and feed the temperature back to the control unit.

[0068] S2: The control unit determines the working mode based on the analysis of the ambient temperature, that is, analyzes which temperature range the ambient temperature belongs to at this time, and then the control unit determines the working mode.

[0069] S3: The control unit sends control instructions to the first fan 113b, the heat exchange air outlet 113a, the first heat dissipation air outlet 111a, the first air inlet 111b, the second fan 111c, the second heat dissipation air outlet 112a, the second air inlet 112d and the third fan 112c according to the corresponding working mode for independent or joint control to achieve heat exchange between the battery compartment 111 and the PCS compartment 112 or joint heat dissipation of the battery compartment 111 and the PCS compartment 112 or separate heat dissipation of the battery compartment 111 and the PCS compartment 112. Since the PCS compartment 112 can be used to achieve heat exchange with the battery compartment 111, heat loss can be reduced. At the same time, there is no need to set up an additional heating device for the battery compartment 111, which saves costs. The separate heat dissipation or joint heat dissipation of the battery compartment 111 and the PCS compartment 112 can be controlled according to different ambient temperatures, which can reduce auxiliary power consumption while ensuring heat dissipation efficiency.

[0070] In the above step S2, it is divided into two steps:

[0071] S21: Divide the ambient temperature into a first preset temperature section, a second preset temperature section, a third preset temperature section, a fourth preset temperature section and a fifth preset temperature section, wherein the fifth preset temperature section > the fourth preset temperature section > the third preset temperature section > the second preset temperature section > the first preset temperature section. In this embodiment, the first preset temperature section refers to a temperature of minus 20° and below, the second preset temperature section refers to a temperature of minus 10° to 5°, the third preset temperature section refers to a temperature of 5° to 25°, the fourth preset temperature section refers to a temperature of 25° to 35°, and the fifth preset temperature section refers to a temperature of 35° to 50°.

[0072] S22: Determine the working mode based on the analysis and judgment of the ambient temperature, including:

[0073] Mode 1: When the ambient temperature is within the first preset temperature range, the first fan 113b is controlled to rotate in the first direction and the heat exchange vent 113a is opened. The first fan 113b and the heat exchange vent 113a cooperate to form an internal circulation, and the hot air in the PCS compartment 112 is transferred to the battery compartment 111. That is, when the ambient temperature is below minus 20°, it is in an extremely cold environment. Turning on the energy storage inverter 300 will generate a large amount of heat, and the battery module 200 needs to be heated to above 0° before normal charging and discharging. Therefore, the first fan 113b and the heat exchange vent 113a are used to exchange heat between the PCS compartment 112 and the battery compartment 111, thereby reducing the temperature in the PCS compartment 112 and increasing the temperature in the battery compartment 111. This not only reduces the temperature in the PCS compartment 112 but also increases the temperature in the battery compartment 111, and effectively utilizes the heat generated by the energy storage inverter 300 to avoid heat waste.

[0074] Mode 2: When the ambient temperature is within the second preset temperature range, the first fan 113b is controlled to rotate in the first direction, and the heat exchange air outlet 113a and the second heat dissipation air outlet 112a are opened. The first fan 113b and the heat exchange air outlet 113a cooperate to form a circulation, and the PCS compartment 112 is cooled. That is, when the ambient temperature is between -10° and 5°, when the energy storage inverter 300 is started, the temperature in the PCS compartment 112 is higher, but the battery compartment 111 still needs to supplement heat. Therefore, the temperature in the battery compartment 111 is still increased through heat exchange between the PCS compartment 112 and the battery compartment 111. However, at this time, the heat exchange can no longer meet the heat dissipation needs in the PCS compartment 112. Therefore, it is necessary to open the second heat dissipation air outlet 112a and dissipate heat through the second heat dissipation air outlet 112a to meet the heat dissipation needs.

[0075] Mode three: When the ambient temperature is within the third preset temperature range, the second heat dissipation vent 112a is controlled to open to dissipate heat to the PCS compartment 112. When the ambient temperature is between 5° and 25°, the ambient temperature at this time is compatible with the temperature required by the battery module 200, and the battery module 200 does not need to be heated or dissipated, then the first heat dissipation vent 111a, the heat exchange vent 113a and the first fan 113b are closed, but at this time the PCS compartment 112 needs to dissipate heat, therefore, the second heat dissipation vent 112a is controlled to open, and heat is dissipated through the second heat dissipation vent 112a.

[0076] Mode 4: When the ambient temperature is within the fourth preset temperature range, the first fan 113b is controlled to rotate in the second direction, the first air inlet 111b, the second heat dissipation outlet 112a and the third fan 112c are turned on, and the battery compartment 111 and the PCS compartment 112 are jointly cooled. That is, when the ambient temperature is between 25° and 35°, the battery module 200 is still at a suitable temperature. However, considering that the battery module 200 needs to be charged and discharged repeatedly during operation, it will cause heat generation, resulting in uneven temperature on the battery module 200. In this embodiment, the PCS compartment 112 is located directly above the battery compartment 111, and an annular channel is provided between the battery module 200 and the inner wall of the battery compartment 111. When the first fan 113b rotates in the second direction, it will extract electricity. The gas in the battery compartment 111, the battery compartment 111 draws in external air through the first air inlet 111b, a part of the external air is directly sucked into the PCS compartment 112, and the other part can run around the annular channel and then be sucked into the PCS compartment 112 by the first fan 113b, which can evenly distribute the heat on the battery module 200. At the same time, when entering the PCS compartment 112, it can drive the air flow in the PCS compartment 112 to move and be discharged from the second heat dissipation outlet 112a. Of course, the heat dissipation through the second heat dissipation outlet 112a cannot meet the heat dissipation requirements of the PCS compartment 112 within the fourth preset temperature range. At this time, the third fan 112c can also be turned on to assist in heat dissipation, which is equivalent to not turning on the additional cooling fan of the battery compartment 111, thereby reducing energy consumption.

[0077] Mode 5: When the ambient temperature is within the fifth preset temperature range, the second fan 111c, the first air inlet, the first heat dissipation vent, the third fan 112c, the second air inlet and the second heat dissipation vent are all controlled to be turned on, and the first fan 113b and the heat exchange vent 113a are closed, so that the battery compartment 111 and the PCS compartment 112 are cooled separately. When the ambient temperature reaches 35° to 50°, both the battery module 200 and the energy storage inverter 300 need to be cooled, so the battery compartment 111 and the PCS compartment 112 are cooled separately.

[0078] From heat exchange to independent heat dissipation, various modes can be adjusted and controlled, and the most suitable mode can be selected to improve energy utilization and reduce losses.

[0079] The technical solutions of the present invention have been described in detail above with reference to the accompanying drawings, and the embodiments described are intended to facilitate understanding of the concepts of the present invention. The specific embodiments described herein are merely illustrative of the spirit of the present invention. Persons skilled in the art may make various modifications, additions, or substitutions to the described specific embodiments, without departing from the spirit of the present invention or exceeding the scope defined by the appended claims.

[0080] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0081] In addition, in the present invention, descriptions such as "first," "second," and "one" are for descriptive purposes only and should not be understood to indicate or imply their relative importance or implicitly specify the number of the technical features indicated. Therefore, a feature specified as "first" or "second" may explicitly or implicitly include at least one of such features. In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0082] In the present invention, unless otherwise specified or limited, the terms "connection" and "fixation" should be understood in a broad sense. For example, "fixation" can mean fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. Those skilled in the art will be able to understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0083] In addition, the technical solutions between the various embodiments of the present invention can be combined with each other, but it must be based on the fact that ordinary technicians in this field can implement it. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

Claims

1. An energy storage box, characterized in that: include: A box body (110) is provided with a battery compartment (111) and a PCS compartment (112), a first air guide member and a heat exchange air outlet (113a) for connecting the two compartments are provided between the two compartments, the battery compartment (111) is provided with a first heat dissipation air outlet (111a), the PCS compartment (112) is provided with a second heat dissipation air outlet (112a), and control switches are provided in the heat exchange air outlet (113a), the first heat dissipation air outlet (111a), and the second heat dissipation air outlet (112a); A control unit is electrically connected to the first air guide member and the plurality of control switches; wherein, The control unit controls the first air guide to rotate in a first direction and the heat exchange air outlet (113a) to open, so as to achieve heat exchange between the battery compartment (111) and the PCS compartment (112); or, The control unit controls the first air guide to rotate in a second direction and the second heat dissipation vent (112a) to open, so as to achieve joint heat dissipation of the battery compartment (111) and the PCS compartment (112); or, The control unit controls the first heat dissipation vent (111a) and / or the second heat dissipation vent (112a) to open, so as to achieve independent heat dissipation of the battery compartment (111) and the PCS compartment (112).

2. An energy storage box (100) according to claim 1, characterized in that: When the first guide member rotates in a first direction, it is used to transport the gas in the PCS compartment (112) to the battery compartment (111); when the first guide member rotates in a second direction, it is used to transport the gas in the battery compartment (111) to the PCS compartment (112).

3. An energy storage box (100) according to claim 1 or 2, characterized in that: A partition (113) is provided between the battery compartment (111) and the PCS compartment (112); the first guide member is configured as a first fan (113b); the first fan (113b) and the heat exchange vent (113a) are respectively arranged at two ends of the partition (113); and the second heat dissipation vent (112a) is arranged on a side of the PCS compartment (112) close to the heat exchange vent (113a).

4. An energy storage box (100) according to claim 3, characterized in that: The battery compartment (111) is further provided with a first air inlet (111b), the first air inlet (111b) being arranged on a side of the battery compartment (111) close to the first fan (113b), and the control switch electrically connected to the control unit is provided in the first air inlet (111b); The two first heat dissipation vents (111a) are symmetrically arranged at the bottom of the battery compartment (111), and a second fan (111c) is provided in each of the two first heat dissipation vents (111a), and the second fan (111c) is electrically connected to the control unit.

5. The energy storage box (100) according to claim 1, characterized in that: The PCS bin (112) is further provided with a heat dissipation fin (112b), a third fan (112c) and a second air inlet (112d); the heat dissipation fin (112b) is arranged on the back of the PCS bin (112); the third fan (112c) is located on one side of the heat dissipation fin (112b) and is electrically connected to the control unit; The second air inlet (112d) is located at the top of the PCS compartment (112), and the control switch connected to the control unit via an electrical signal is provided in the second air inlet (112d).

6. The energy storage box (100) according to claim 1, characterized in that: It also includes a temperature sensor, which is used to detect the ambient temperature and is connected to the control unit by electrical signals.

7. The energy storage box (100) according to claim 1, characterized in that: The box further comprises a cover (120), a PCS sealing plate (130) and a battery sealing plate (140); the box is provided with an opening, the cover (120) is detachably arranged at the opening, the PCS sealing plate (130) is located at the opening of the PCS compartment (112), and the battery sealing plate (140) is located at the opening of the battery compartment (111).

8. An energy storage system, characterized in that: include: The energy storage box (100) according to any one of claims 1 to 7; A battery module (200) is arranged in the battery compartment (111); An energy storage converter (300) is arranged in the PCS compartment (112).

9. A heat treatment method for an energy storage system, characterized in that: The energy storage system comprises an energy storage box (100), the energy storage box (100) comprises a box body (110), a control unit and a temperature sensor, a battery compartment (111) and a PCS compartment (112) are provided in the box body (110), a first fan (113b) and a heat exchange vent (113a) for connecting the battery compartment (111) and the PCS compartment (112) are provided between the battery compartment (111) and the PCS compartment (112), the battery compartment (111) is provided with a first heat dissipation vent (111a), a first air inlet (111b) and a heat exchange vent (113a) located at the first heat dissipation vent The second fan (111c) in the (111a), the PCS compartment (112) is provided with a second heat dissipation vent (112a), a second air inlet (112d), heat dissipation fins (112b) and a third fan (112c), the first heat dissipation vent (111a), the first air inlet (111b), the second heat dissipation vent (112a) and the second air inlet (112d) are all provided with a control switch connected to the control unit by electrical signals, the first fan (113b), the second fan (111c) and the third fan (112c) are all connected to the control unit by electrical signals; the method comprises the following steps: S1: Detects the ambient temperature through the temperature sensor and feeds the temperature back to the control unit; S2: The control unit determines the working mode based on the analysis and judgment of the ambient temperature; S3: The control unit sends control instructions to the first fan (113b), the heat exchange air outlet (113a), the first heat dissipation air outlet (111a), the first air inlet (111b), the second fan (111c), the second heat dissipation air outlet (112a), the second air inlet (112d), and the third fan (112c) according to the corresponding working mode to perform independent or joint control, so as to achieve heat exchange between the battery compartment (111) and the PCS compartment (112), joint heat dissipation between the battery compartment (111) and the PCS compartment (112), or separate heat dissipation between the battery compartment (111) and the PCS compartment (112).

10. The heat treatment method of an energy storage system according to claim 9, characterized in that: In step S2, the steps are included: S21: Dividing the ambient temperature into a first preset temperature section, a second preset temperature section, a third preset temperature section, a fourth preset temperature section, and a fifth preset temperature section, wherein the fifth preset temperature section>the fourth preset temperature section>the third preset temperature section>the second preset temperature section>the first preset temperature section; S22: Determine the working mode based on the analysis and judgment of the ambient temperature, including: Mode 1: When the ambient temperature is within the first preset temperature range, the first fan (113b) is controlled to rotate in a first direction and the heat exchange air outlet (113a) is opened, and the first fan (113b) and the heat exchange air outlet (113a) cooperate to form an internal circulation, transferring the hot air in the PCS compartment (112) to the battery compartment (111); Mode 2: When the ambient temperature is within the second preset temperature range, the first fan (113b) is controlled to rotate in the first direction, the heat exchange air outlet (113a) and the second heat dissipation air outlet (112a) are opened, and a circulation is formed by the cooperation of the first fan (113b) and the heat exchange air outlet (113a), and the PCS bin (112) is cooled; Mode three: when the ambient temperature is within the third preset temperature range, the second heat dissipation vent (112a) is controlled to open to dissipate heat from the PCS bin (112); Mode 4: When the ambient temperature is within the fourth preset temperature range, the first fan (113b) is controlled to rotate in the second direction, the first air inlet (111b), the second heat dissipation air outlet (112a), and the third fan (112c) are turned on, and the battery compartment (111) and the PCS compartment (112) are jointly cooled; Mode 5: When the ambient temperature is within the fifth preset temperature range, the second fan (111c), the first air inlet, the first heat dissipation vent, the third fan (112c), the second air inlet, and the second heat dissipation vent are all controlled to be open, and the first fan (113b) and the heat exchange vent (113a) are closed, so that the battery compartment (111) and the PCS compartment (112) are cooled separately.

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