Temperature control device and control method of energy storage container and energy storage container

Abstract

The invention provides a temperature control device and method for an energy storage container and the energy storage container, the temperature control device comprises an immersion shell, the immersion shell comprises a battery part and an inclined body part, the inner side of the battery part is provided with a first cavity, the inclined body part is arranged on one side of the battery part, and the inclined body part gradually inclines upwards in the direction away from the battery part; a second cavity is formed in the inner side of the inclined body part and communicates with the first cavity; the battery unit is arranged in the first cavity; the immersion liquid is arranged in the first cavity and the second cavity, and at least half of the battery unit in the height direction is immersed in the immersion liquid; and the condensing device is arranged on one side, far away from the battery part, of the inclined body part and is used for cooling and condensing the evaporated immersion liquid. Through the arrangement of the inclined body part on the immersion shell, the amount of immersion liquid is increased, the flowing efficiency of gas after the immersion liquid is evaporated is further improved, heat exchange between condensate water and the gas after the immersion liquid is evaporated can be achieved through the arrangement of the water collecting device, and therefore the cooling capacity contained in the condensate water is effectively utilized.

Description

Technical Field

[0001] The present invention relates to the technical field of charging equipment, and in particular to a temperature control device and a control method for an energy storage container, and an energy storage container. Background Art

[0002] Under the background of the development of new energy industry, the battery energy storage of clean energy is becoming more and more mature. Containers composed of battery system, energy conversion system, cooling system, control system, fire protection system and auxiliary system have also been widely used as energy storage. Energy storage containers have high energy density, easy installation, convenient transportation and high integration, which can meet the needs of different industries and working environments.

[0003] Since a large number of energy storage devices such as battery modules are integrated in the energy storage container, the heat generated during operation is relatively large, resulting in high requirements for the heat dissipation performance of the energy storage container. Energy storage containers in the prior art usually use air cooling or liquid cooling plates to control the temperature of the battery modules. However, due to the influence of the sealing of the energy storage container and the location of the battery modules and cooling devices, the temperature distribution inside the container is often uneven, and it is impossible to ensure that all battery modules are at the ideal operating temperature. When the temperature of the battery module is too high, there is a risk of fire caused by thermal runaway. Summary of the invention

[0004] The problem to be solved by the present invention is that, in the prior art, due to the influence of the sealing of the energy storage container and the location of the battery module and the cooling device, the temperature distribution inside the container is often uneven, and it is impossible to ensure that all battery modules are at an ideal operating temperature. When the temperature of the battery module is too high, there is a risk of fire caused by thermal runaway.

[0005] In order to solve the above problems, the present invention discloses a temperature control device for an energy storage container, comprising:

[0006] An immersion shell includes a battery portion and an oblique body portion, wherein a first chamber is disposed inside the battery portion, the oblique body portion is disposed on one side of the battery portion, the oblique body portion gradually tilts upward in a direction away from the battery portion, a second chamber is disposed inside the oblique body portion, and the second chamber is communicated with the first chamber;

[0007] A battery unit is disposed in the first chamber;

[0008] An immersion liquid is disposed in the first chamber and the second chamber, wherein the immersion liquid at least immerses half of the battery cell in a height direction;

[0009] The condensing device is arranged on a side of the oblique body away from the battery part. The condensing device is arranged in close contact with the oblique body and is used for cooling and condensing the evaporated immersion liquid.

[0010] Through the above-mentioned arrangement, on the one hand, the first cavity can accommodate more immersion liquid when the battery cells are placed, thereby significantly improving the temperature control ability of the immersion liquid, reducing the number and time of opening the condensing device, and effectively saving the cost of temperature control while ensuring the operating temperature of the battery cells; on the other hand, it can increase the evaporation and condensation cycle speed of the immersion liquid and improve the condensation efficiency of the condensing device.

[0011] Furthermore, a water collecting device is provided on the upper side of the oblique body portion or the oblique body portion and the battery portion, and the water collecting device is used to collect condensed water on the condensing device and make the condensed water flow at least over the upper surface of the oblique body portion.

[0012] By setting up the water collecting device, the condensed water flows through the upper surface of the inclined body. Since the upper plate of the inclined body is inclined, the steam generated inside the immersion shell rises along the inner surface of the upper plate of the inclined body, so that the upper plate of the inclined body becomes a heat exchange structure between the condensed water and the steam of the immersion liquid, so that the condensed water is used to cool the steam. On the one hand, the refrigeration capacity is fully utilized and the refrigeration efficiency is improved. On the other hand, the condensation capacity is increased and the condensation efficiency of the immersion liquid is improved.

[0013] Furthermore, the water collecting device includes a side baffle, a lower baffle, a water collecting trough and a drainage hole. There are two side baffles, which are respectively arranged on the front and rear sides of the upper surface of the oblique body portion. One end of the side baffle is arranged in contact with the condensing device, and the other end is connected to the lower baffle. The lower baffle is arranged near the connection between the battery part and the oblique body portion. The water collecting trough is arranged on the side of the lower baffle facing the condensing device, and the water collecting trough is arranged near the lower baffle. The drainage hole is arranged at one end of the water collecting trough, which is used to transport the collected condensed water to the condensed water collection structure in the energy storage container.

[0014] The side baffles can prevent the condensed water from flowing disorderly from the front or rear side, and the lower baffle is used to stop the condensed water so that it can be collected in the water collection tank and then discharged through the drainage hole.

[0015] Furthermore, the water collecting device also includes a plurality of retaining ribs staggeredly arranged on the upper surface of the inclined body portion, and the retaining ribs are used to form a tortuous flow channel for condensed water.

[0016] One end of some of the baffles is connected to the side baffle at the front side, and the other end extends to the side baffle at the rear side. One end of another part of the baffle is connected to the side baffle at the rear side, and the other end extends to the side baffle at the front side, thereby forming a tortuous flow channel. This arrangement can effectively increase the flow time of condensed water on the upper surface of the oblique body, thereby extending the heat exchange time with the steam on the inner surface of the upper plate of the oblique body, so that the condensed water can fully exchange heat, thereby improving the refrigeration efficiency of the energy storage container.

[0017] Furthermore, the retaining rib is inclined downward during the extension process.

[0018] The inclined setting of the retaining ribs enables the condensed water to gradually flow downward along the surface of the retaining ribs, avoiding the formation of water accumulation on the retaining ribs, thereby ensuring the fluidity of the condensed water. This setting also extends its flow path while ensuring the fluidity of the condensed water, thereby improving the heat exchange effect.

[0019] Furthermore, the angle between the italic portion and the horizontal direction is 25°-35°.

[0020] When the angle is within the above range, the liquid that can be added to the temperature control device and its overall height can achieve a better matching state.

[0021] Furthermore, the condensing device includes a main line, a first branch is arranged at a position of the main line corresponding to each immersion shell, a main line valve body is arranged at a position of the main line corresponding to each first branch, and a first valve body is arranged on each first branch.

[0022] Through the above-mentioned setting, the condensing device can realize the selective condensation of the immersion shell, thereby saving the temperature control cost. For example, if the temperature of the battery unit in the current corresponding immersion shell is low, and the temperature of the battery unit below it is high, and temperature control is required, the main valve body on the main line corresponding to the current immersion shell is closed, and the first valve body on the first branch corresponding to it is opened, and the main valve body on the main line corresponding to the immersion shell below it is opened, and the first valve body on the first branch corresponding to it is closed, so that the condensing device does not exchange heat with the current immersion shell, and exchanges heat with the immersion shell below in a targeted manner, effectively saving condensation resources and reducing temperature control costs. In addition, it can also ensure that all battery units in the energy storage container are within a reasonable operating temperature range, avoid the phenomenon of too low or too high temperature, and ensure the working stability of the battery unit.

[0023] Furthermore, the boiling point T of the immersion liquid is between 30°C and 40°C.

[0024] Limiting the boiling point of the immersion liquid to 30°C to 40°C allows it to evaporate continuously during battery operation. Even when it boils, it remains at a relatively reasonable temperature, which can effectively prevent thermal runaway of the battery and ensure its operating safety.

[0025] The present invention also discloses a temperature control method, which is used for the temperature control device as described above, and is characterized in that the control method comprises:

[0026] Step S1: Detect the temperature T of all battery cells in the energy storage container i ;

[0027] Step S2: Set T i are compared with the first preset temperature T1 respectively. i > When T1, the refrigeration device in the energy storage container is started to provide condensate for the condensing device;

[0028] Step S3: According to T i Compared with the first preset temperature T1, when T i >T1, execute step S4; when T i ≤T1, execute step S6;

[0029] Step S4: Replace the T in step S3 i >T1, and the submerged shell where the battery unit with a temperature greater than the first preset temperature T1 in step S7 is located is recorded as a cooling group, and the corresponding main valve body is opened, the first valve body is closed, and then step S5 is executed;

[0030] Step S5: Real-time detection of the temperature of the battery cells in each immersed shell in the cooling group, when the temperature is less than or equal to the second preset temperature T2, executing step S6;

[0031] Step S6: T in step S3 i ≤T1, and the submerged shell where the battery unit whose temperature is less than or equal to the second preset temperature T2 in step S5 is located is recorded as a non-cooling group, and the corresponding main valve body is closed, the first valve body is opened, and then step S7 is executed;

[0032] Step S7: Real-time detection of the temperature of the battery cells in each submerged shell in the non-cooling group, when the temperature is greater than the first preset temperature T1, executing step S4;

[0033] Wherein, i is the number of the battery unit and / or the immersion shell in the energy storage container, the first preset temperature T1 and the second preset temperature T2 are preset values, T1>T>T2, and T is the boiling point of the immersion liquid 430.

[0034] Through the above-mentioned arrangement, the condensation and refrigeration operation can be carried out when the temperature of the immersion liquid is higher than a certain level, so as to ensure that the refrigeration effect of the immersion liquid itself can be fully utilized. When it is in the cooling group, the condensation is stopped when its temperature is lower than a certain level, so as to reduce the opening and closing times of the corresponding valve body and ensure the normal operation of the equipment.

[0035] The present invention also discloses an energy storage container, comprising the temperature control device as described above.

[0036] Compared with the prior art, the temperature control device, control method and energy storage container of the present invention have the following advantages:

[0037] The present invention realizes immersion cooling of the battery unit by setting the immersion liquid in the immersion shell, so that the battery unit is within a suitable operating temperature range. By setting the bevel part on the immersion shell, on the one hand, the amount of immersion liquid is increased, and the stability of immersion cooling is improved. On the other hand, the flow efficiency of the gas after the evaporation of the immersion liquid is improved, so that it can be condensed into liquid by the condensation device more quickly and gathered to the battery part, pushing up the liquid level in the battery part to maintain the stability of the battery unit temperature. The setting of the water collecting device on the bevel part is convenient for the collection of condensed water on the one hand, and on the other hand, it can also make the condensed water and the gas after the evaporation of the immersion liquid exchange heat, so as to effectively utilize the cold contained in the condensed water, effectively reduce energy consumption, and improve temperature control efficiency. The present invention has a simple structure, ensures that the battery units are in a stable temperature state by immersion, effectively prevents the occurrence of thermal runaway, and improves the operation safety of the energy storage container. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 This is a front view of the energy storage container according to an embodiment of the present invention;

[0039] Figure 2 This is a schematic diagram of the three-dimensional structure of the temperature control device according to an embodiment of the present invention arranged on a rack;

[0040] Figure 3 It is a schematic diagram of the three-dimensional structure of the temperature control device according to an embodiment of the present invention;

[0041] Figure 4 A top view of a temperature control device according to an embodiment of the present invention;

[0042] Figure 5 for Figure 4 Schematic diagram of the cross-sectional structure of the middle AA part;

[0043] Figure 6 for Figure 4 A partial enlarged schematic diagram of the B part;

[0044] Figure 7 Schematic diagram of the piping structure of the condensing device in an embodiment of the present invention.

[0045] Description of reference numerals:

[0046] 100, housing; 200, rack; 210, support plate; 300, refrigeration device; 400, immersion shell; 410, battery part; 420, oblique body; 421, side baffle; 422, baffle rib; 423, lower baffle; 424, water collecting trough; 425, drain hole; 430, immersion liquid; 500, condensing device; 510, main line; 511, main line valve body; 520, first branch; 521, first valve body; 600, battery unit. DETAILED DESCRIPTION

[0047] To make the purpose, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. The specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention. It should be noted that the embodiments of the present invention and the features in the embodiments can be combined with each other without conflict.

[0048] A temperature control device, a control method and an energy storage container of an embodiment of the present invention will be described in detail below with reference to the accompanying drawings.

[0049] Example 1

[0050] This embodiment provides a temperature control device for an energy storage container, such as Figure 1-7 As shown, including:

[0051] The immersion shell 400 includes a battery portion 410 and an oblique portion 420, wherein a first chamber is disposed inside the battery portion 410, the oblique portion 420 is disposed on one side of the battery portion 410, the oblique portion 420 gradually tilts upward in a direction away from the battery portion 410, and a second chamber is disposed inside the oblique portion 420, the second chamber being communicated with the first chamber;

[0052] A battery unit 600 is disposed in the first chamber;

[0053] An immersion liquid 430 is disposed in the first chamber and the second chamber, and the immersion liquid 430 immerses at least half of the battery unit 600 in a height direction;

[0054] The condensation device 500 is disposed on a side of the oblique body 420 away from the battery portion 410 . The condensation device 500 is disposed close to the oblique body 420 and is used to cool and condense the evaporated immersion liquid 430 .

[0055] In the above device, the immersion liquid 430 gradually evaporates during the operation of the battery, and absorbs a large amount of heat during evaporation, thereby absorbing the heat generated by the battery cell 600 during operation and keeping it at a stable temperature. The arrangement of the oblique body 420 allows the steam formed by the immersion liquid 430 absorbing the heat from the battery cell 600 and evaporating to rise rapidly along the inner surface of the upper plate of the oblique body 420 (such as Figure 5The condensation liquid 430 is heated and cooled by the condensing device 500, and then evaporated. As shown in the figure, the condensation liquid 430 is heated and cooled by the condensing device 500, and then evaporated. As shown in the figure, the condensation liquid 430 is cooled and cooled by the condensing device 500, and then evaporated. As shown in the figure, the condensation liquid 430 is cooled and cooled by the condensing device 500, and then evaporated. As shown in the figure, the condensation liquid 430 is heated ... Through the above arrangement, on the one hand, the first cavity can accommodate more immersion liquid 430 when the battery unit 600 is placed, thereby significantly improving the temperature control ability of the immersion liquid 430, reducing the number and time of opening the condensing device 500, and effectively saving the cost of temperature control while ensuring the operating temperature of the battery unit 600; on the other hand, it can increase the evaporation and condensation cycle speed of the immersion liquid 430 and improve the condensation efficiency of the condensing device 500. It should be noted that the battery unit 600 can be a battery monomer or a battery module.

[0056] As one of the preferred embodiments, a water collecting device is provided on the upper side of the bevel portion 420 or the bevel portion 420 and the battery portion 410 , and the water collecting device is used to collect condensed water on the condensation device 500 and allow the condensed water to flow at least over the upper surface of the bevel portion 420 . Since the temperature of the condensing device 500 is usually low, condensed water is easily formed on its surface. In the energy storage container, condensed water is also a problem that is difficult to deal with. The usual treatment method is to collect and discharge it. Since the condensed water is generated on the surface of the condensing device 500 and its temperature is relatively low, directly discharging it will cause a waste of refrigeration capacity. In this embodiment, the condensed water is caused to flow through the upper surface of the bevel portion 420 through the setting of the water collecting device. Since the upper plate of the bevel portion 420 is inclined, the steam generated inside the immersion shell 400 rises along the inner surface of the upper plate of the bevel portion 420, so that the upper plate of the bevel portion 420 becomes a heat exchange structure between the condensed water and the steam of the immersion liquid 430, so that the condensed water is used to cool the steam. On the one hand, the refrigeration capacity is fully utilized and the refrigeration efficiency is improved. On the other hand, the condensation capacity is increased and the condensation efficiency of the immersion liquid 430 is improved.

[0057] In this embodiment, the water collecting device includes a side baffle 421, a lower baffle 423, a water collecting trough 424 and a drainage hole 425. There are two side baffles 421, which are respectively arranged on the front and rear sides of the upper surface of the oblique body 420. One end of the side baffle 421 is arranged in contact with the condensing device 500, and the other end is connected to the lower baffle 423. The lower baffle 423 is arranged at a position close to the connection between the battery part 410 and the oblique body 420. The water collecting trough 424 is arranged on the side of the lower baffle 423 facing the condensing device 500, and the water collecting trough 424 is arranged at a position close to the lower baffle 423. The drainage hole 425 is arranged at one end of the water collecting trough 424, which is used to transport the collected condensed water to the condensed water collection structure in the energy storage container. The side baffle 421 can prevent the condensed water from flowing disorderly from the front or rear side, and the lower baffle 423 is used to stop the condensed water so that it can be collected in the water collecting trough 424 and then discharged through the drainage hole 425. The specific structure of the condensate collection structure is no longer within the scope of improvement of the present application, and reference may be made to the prior art, so it will not be described in detail here. Preferably, the drain hole 425 is connected to a drain pipe, and the drain pipe seal is arranged through the immersion shell 400. This arrangement enables the condensate to still exchange heat with the immersion liquid 430 during the discharge process, thereby effectively improving the refrigeration efficiency. Among them, the lower baffle 423 is arranged on the bevel portion 420 and / or the battery portion 410. Preferably, the water collecting tank 424 gradually decreases from the end away from the drain hole 425 to the end close to the drain hole 425. This arrangement helps to improve the fluidity of the condensate to prevent it from staying in the water collecting tank 424 for a long time.

[0058] Preferably, the water collecting device further comprises a plurality of baffles 422 staggeredly arranged on the upper surface of the oblique body 420, and the baffles 422 are used to form a zigzag flow channel for condensed water. One end of some baffles 422 is connected to the side baffle 421 located at the front side, and the other end extends to the side baffle 421 located at the rear side, and one end of another baffle 422 is connected to the side baffle 421 located at the rear side, and the other end extends to the side baffle 421 located at the front side, thereby forming a zigzag flow channel. This arrangement can effectively increase the flow time of condensed water on the upper surface of the oblique body 420, thereby extending the heat exchange time between the condensed water and the steam on the inner surface of the upper plate of the oblique body 420, so that the condensed water can fully exchange heat, thereby improving the refrigeration efficiency of the energy storage container.

[0059] As one of the optional embodiments, Figure 4As shown, the retaining rib 422 is inclined downward during the extension process. Preferably, the left angle between the retaining rib 422 and the side baffle 421 connected thereto is between 85° and 88°. The inclined setting of the retaining rib 422 enables the condensed water to gradually flow downward along the surface of the retaining rib 422, thereby avoiding the formation of water accumulation on the retaining rib 422 and ensuring the fluidity of the condensed water. The above angle setting extends the flow path of the condensed water while ensuring the fluidity of the condensed water, thereby improving the heat exchange effect.

[0060] As one of the preferred examples, the angle between the bevel portion 420 and the horizontal direction is 25°-35°. Preferably, the angle between the bevel portion 420 and the horizontal direction is 30°. When the angle is within the above range, the liquid that can be added to the temperature control device and its overall height can achieve a better matching state.

[0061] As one of the optional embodiments, the condensing device 500 includes a main line 510, a first branch line 520 is arranged at a position corresponding to each immersion shell 400 of the main line 510, a main line valve body 511 is arranged at a position corresponding to each first branch line 520 on the main line 510, and a first valve body 521 is arranged on each first branch line 520. The first branch line 520 is used to cooperate with the main line valve body 511 to bypass the main line 510 at one end corresponding to the current immersion shell 400, and the first branch line 520 does not exchange heat with the current immersion shell 400 to which it corresponds. Through the above arrangement, the condensing device 500 can achieve selective condensation of the immersion shell 400, thereby saving the temperature control cost. For example, if the temperature of the battery cell 600 in the current corresponding immersion shell 400 is relatively low, while the temperature of the battery cell 600 on the lower side is relatively high and temperature control is required, the main circuit valve body 511 on the main circuit 510 corresponding to the current immersion shell 400 is closed, and the first valve body 521 on the corresponding first branch circuit 520 is opened, and the main circuit valve body 511 on the main circuit 510 corresponding to the immersion shell 400 on the lower side is opened, and the first valve body 521 on the corresponding first branch circuit 520 is closed, so that the condensing device 500 does not exchange heat with the current immersion shell 400, but exchanges heat with the immersion shell 400 on the lower side in a targeted manner, effectively saving condensation resources and reducing temperature control costs. In addition, it can also ensure that all battery cells 600 in the energy storage container are within a reasonable operating temperature range, avoid the phenomenon of too low or too high temperature, and ensure the working stability of the battery cells 600. The main valve body 511 is disposed between the corresponding first branch 520 and the intersection of the liquid inlet side and the liquid outlet side of the main line 510. The first branch 520 does not exchange heat with the immersion shell 400, which can be achieved by arranging corresponding heat insulation materials thereon, and no further description is given here. In addition, the corresponding plates and shells arranged on the outside of the main line 510 and the first branch 520 can refer to the existing technology, and no limitation is given here.

[0062] In this embodiment, the boiling point T of the immersion liquid 430 is between 30°C and 40°C. The operating temperature range of the battery is generally below 50°C, and the optimal operating temperature is between 20°C and 40°C. Limiting the boiling point of the immersion liquid 430 to 30°C to 40°C allows it to evaporate continuously during the operation of the battery, and even if it reaches boiling, it remains at a more reasonable temperature, which can effectively avoid thermal runaway of the battery and ensure its operating safety.

[0063] Preferably, the immersion liquid 430 is DA-324. The boiling point of DA-324 is 34.2°C, and when it boils, it can also ensure that the battery is in a better operating temperature range. It should be understood that the immersion liquid 430 can also be other fluorinated liquids or composite immersion solutions, which are not limited here.

[0064] Preferably, the ratio of the depth of the immersion liquid 430 to the height of the battery cell 600 is 0.8 to 1.2. This configuration allows most of the battery cell 600 to be immersed in the immersion liquid 430, achieving uniform temperature control of the battery cell 600 and reducing the phenomenon of local over-temperature.

[0065] Example 2

[0066] This embodiment discloses a temperature control method for controlling the temperature control device of the energy storage container as described in Embodiment 1.

[0067] The control method comprises:

[0068] Step S1: Detecting the temperature T of all battery cells 600 in the energy storage container i ;

[0069] Step S2: Set T i are compared with the first preset temperature T1 respectively. i >T1, the refrigeration device 300 in the energy storage container is started to provide condensate for the condensing device 500;

[0070] Step S3: According to T i Compared with the first preset temperature T1, when T i >T1, execute step S4; when T i ≤T1, execute step S6;

[0071] Step S4: Replace the T in step S3 i >T1, and the immersion shell 400 where the battery unit 600 whose temperature is greater than the first preset temperature T1 in step S7 is located is recorded as a cooling group, and the corresponding main valve body 511 is opened, and the first valve body 521 is closed, and then step S5 is executed;

[0072] Step S5: Real-time detection of the temperature of the battery unit 600 in each immersion shell 400 in the cooling group, when the temperature is less than or equal to the second preset temperature T2, executing step S6;

[0073] Step S6: T in step S3 i ≤T1, and the immersion shell 400 where the battery unit 600 whose temperature is less than or equal to the second preset temperature T2 in step S5 is located is recorded as a non-cooling group, and the corresponding main valve body 511 is closed, and the first valve body 521 is opened, and then step S7 is executed;

[0074] Step S7: Real-time detection of the temperature of the battery cells 600 in each submerged shell 400 in the non-cooling group, when the temperature is greater than the first preset temperature T1, executing step S4;

[0075] Wherein, i is the serial number of the battery unit 600 and / or the immersion shell 400 in the energy storage container, the first preset temperature T1 and the second preset temperature T2 are preset values, T1>T>T2, and T is the boiling point of the immersion liquid 430.

[0076] Through the above-mentioned arrangement, the condensation and refrigeration operation can be performed when the temperature of the immersion liquid 430 is higher than a certain level, so as to ensure that the refrigeration effect of the immersion liquid 430 itself can be fully utilized. When it is in the cooling group, the condensation is stopped when its temperature is lower than a certain level, so as to reduce the opening and closing times of the corresponding valve body and ensure the normal operation of the equipment.

[0077] As one of the optional embodiments, the first preset temperature T1 is 4-6°C higher than the boiling point of the immersion liquid 430. As another optional embodiment, the second preset temperature T2 is 2-3°C lower than the boiling point of the immersion liquid 430. Generally, the temperature difference between the battery cell 600 and the immersion liquid 430 is 2-3°C, and the temperature of the battery cell 600 is higher than the temperature of the immersion liquid 430. i >T1, it indicates that most of the immersion liquid 430 has evaporated and the temperature of the battery cell 600 cannot be effectively stabilized. At this time, it is necessary to condense the steam in the immersion shell 400 in time to ensure the stable operation of the battery cell 600. When the temperature of the battery cell 600 drops to T2, it indicates that the temperature of the immersion liquid 430 is lower than the boiling point, and most of the immersion liquid 430 has condensed into liquid, which can effectively control the temperature of the battery cell 600. At this time, there is no need to perform the corresponding condensation operation.

[0078] Example 3

[0079] This embodiment provides an energy storage container, including the temperature control device as described in Example 1, the energy storage container includes a box body 100, a plurality of racks 200 are arranged in the box body 100, a plurality of support plates 210 are arranged in the height direction of the racks 200, the temperature control device is arranged on the support plates 210, and a refrigeration device 300 is also arranged in the box body 100, the refrigeration device 300 is connected to the condensing device 500, and is used to transport condensate to the condensing device 500, and the condensate is water or other refrigerant, which is not limited here.

[0080] The energy storage container includes other conventional components such as PCS, and the details can be referred to the prior art and will not be described here.

[0081] Although the present invention is disclosed as above, the present invention is not limited thereto. In the description of this specification, the description of reference terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. Any person skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention, so the scope of protection of the present invention should be based on the scope defined by the claims.

Claims

1. A temperature control device for an energy storage container, characterized in that: include: An immersion shell (400) comprises a battery portion (410) and an oblique portion (420), wherein a first chamber is provided inside the battery portion (410), the oblique portion (420) is arranged on one side of the battery portion (410), the oblique portion (420) gradually tilts upward in a direction away from the battery portion (410), and a second chamber is provided inside the oblique portion (420), the second chamber being in communication with the first chamber; A battery unit (600) is disposed in the first chamber; An immersion liquid (430) is disposed in the first chamber and the second chamber, wherein the immersion liquid (430) immerses at least half of the battery unit (600) in a height direction; The condensation device (500) is arranged on a side of the oblique body (420) away from the battery part (410). The condensation device (500) is arranged in close contact with the oblique body (420) and is used to cool and condense the evaporated immersion liquid (430).

2. The temperature control device of the energy storage container according to claim 1, characterized in that: A water collecting device is provided on the upper side of the oblique body (420) or the oblique body (420) and the battery part (410), and the water collecting device is used to collect condensed water on the condensing device (500) and allow the condensed water to flow at least over the upper surface of the oblique body (420).

3. The temperature control device of the energy storage container according to claim 2, characterized in that: The water collecting device comprises a side baffle (421), a lower baffle (423), a water collecting trough (424) and a drainage hole (425). There are two side baffles (421), which are respectively arranged on the front and rear sides of the upper surface of the oblique body (420). One end of the side baffle (421) is arranged in contact with the condensing device (500), and the other end is connected to the lower baffle (423). The lower baffle (423) is arranged at a position close to the connection between the battery part (410) and the oblique body (420). The water collecting trough (424) is arranged on a side of the lower baffle (423) facing the condensing device (500), and the water collecting trough (424) is arranged at a position close to the lower baffle (423). The drainage hole (425) is arranged at one end of the water collecting trough (424) and is used to transport the collected condensed water to the condensed water collection structure in the energy storage container.

4. The temperature control device for the energy storage container according to claim 3, characterized in that: The water collection device further comprises a plurality of retaining ribs (422) arranged alternately on the upper surface of the oblique body portion (420), wherein the retaining ribs (422) are used to form a zigzag flow channel for condensed water.

5. The temperature control device for the energy storage container according to claim 4, characterized in that: The retaining rib (422) is inclined downward during the extension process.

6. The temperature control device for the energy storage container according to claim 1, characterized in that: The angle between the oblique body portion (420) and the horizontal direction is 25°-35°.

7. The temperature control device for the energy storage container according to claim 1, characterized in that: The condensing device (500) comprises a main line (510), a first branch line (520) is arranged at a position of the main line (510) corresponding to each immersion shell (400), a main line valve body (511) is arranged at a position of the main line (510) corresponding to each first branch line (520), and a first valve body (521) is arranged on each first branch line (520).

8. The temperature control device for an energy storage container according to claim 1, characterized in that: The boiling point T of the immersion liquid (430) is between 30°C and 40°C.

9. A temperature control method, used in the temperature control device according to any one of claims 1 to 8, characterized in that: The control method comprises: Step S1: Detecting the temperature T of all battery cells (600) in the energy storage container i ; Step S2: Set T i are compared with the first preset temperature T1 respectively. i >When T1, the refrigeration device (300) in the energy storage container is started to provide condensate for the condensing device (500); Step S3: According to T i Compared with the first preset temperature T1, when T i >T1, execute step S4; when T i ≤T1, execute step S6; Step S4: Replace the T in step S3 i >T1, and the submerged shell (400) where the battery unit (600) whose temperature is greater than the first preset temperature T1 in step S7 is located is recorded as a cooling group, and the corresponding main valve body (511) is opened, and the first valve body (521) is closed, and then step S5 is executed; Step S5: Real-time detection of the temperature of the battery unit (600) in each immersed shell (400) in the cooling group, when the temperature is less than or equal to the second preset temperature T2, executing step S6; Step S6: T in step S3 i ≤T1, and the immersion shell (400) where the battery unit (600) whose temperature is less than or equal to the second preset temperature T2 in step S5 is located is recorded as a non-cooling group, and its corresponding main valve body (511) is closed, and the first valve body (521) is opened, and then step S7 is executed; Step S7: Real-time detection of the temperature of the battery unit (600) in each immersed shell (400) in the non-cooling group, and when the temperature is greater than the first preset temperature T1, executing step S4; Wherein, i is the serial number of the battery unit (600) and / or the immersion shell (400) in the energy storage container, the first preset temperature T1 and the second preset temperature T2 are preset values, T1>T>T2, and T is the boiling point of the immersion liquid 430.

10. An energy storage container, characterized in that: Comprising the temperature control device as claimed in any one of claims 1 to 8.

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