Temperature control system of energy storage container and control method thereof

Abstract

The invention provides a temperature control system of an energy storage container and a control method thereof.The temperature control system comprises a temperature control assembly, the temperature control assembly comprises a feeding pipe, a discharging pipe and a plurality of parallel pipes arranged in parallel, one end of each parallel pipe is connected with the feeding pipe, the other end of each parallel pipe is connected with the discharging pipe, and in the flowing direction of a temperature control medium, the discharging pipe is connected with the discharging pipe; an inlet side valve, a temperature control unit and an outlet side valve are sequentially arranged in the parallel pipe; the temperature control unit comprises a first pipe and a second pipe which are arranged in parallel, in the flowing direction of the temperature control medium, a first valve, a first battery module and a second valve are sequentially arranged in the first pipe, and a third valve, a second battery module and a fourth valve are sequentially arranged in the second pipe; according to the invention, any one temperature control unit in the whole temperature control system can be subjected to temperature control adjustment in a local sense, and on the basis, each battery module in the temperature control unit can be subjected to temperature control adjustment one by one, so that the temperature control effect and the temperature control refinement degree in the energy storage container can be improved.

Description

Technical Field

[0001] The present invention relates to the field of energy storage technology, and in particular to a temperature control system of an energy storage container and a control method thereof. Background Art

[0002] The energy storage power station system is a system that uses electrochemical batteries to store electrical energy and can be connected to the municipal power grid. With the rapid development of new energy industries such as wind power and photovoltaics, the large-capacity energy storage industry is accelerating. After the power storage system is introduced into the power system, it can not only improve the stability of the power grid system, but also serve as a new means of adjusting frequency, power compensation, improving power quality, compensating load fluctuations, shifting peaks and filling valleys, improving power demand side management capabilities, expanding the use of power equipment, and promoting the application of renewable energy.

[0003] In the prior art, energy storage containers are often used in power energy storage systems. They are highly internally integrated energy storage devices with only a small number of primary and secondary interfaces with the outside world, which greatly reduces the workload of integrated design and has the characteristics of small footprint, flexible installation, good mobility and scalability. The energy storage batteries in the energy storage container will generate a large amount of heat during operation, causing the local temperature of the container to be too high, especially the temperature of each battery module, which often affects the stability and safety of the energy storage system. Therefore, the heat dissipation of the energy storage container is very critical. The current heat dissipation methods for energy storage containers usually adopt methods such as opening shutters, setting cooling fans, refrigeration and air conditioning, etc., which have limited effect on the temperature control of the battery modules in the container and easily lead to overheating of the energy storage batteries.

[0004] In addition, at any working time point, the working state of each battery module in the energy storage container is often different. Correspondingly, the temperature of each battery module also varies to a certain extent. However, the existing energy storage container temperature control system often uniformly controls the battery modules, making it difficult to improve the degree of refinement of temperature control. Summary of the invention

[0005] In view of this, the present invention aims to propose a temperature control system and a control method for an energy storage container, so as to solve the problems of poor temperature control effect and low degree of temperature control refinement in existing energy storage containers in the prior art.

[0006] To achieve the above object, the technical solution of the present invention is achieved as follows:

[0007] A temperature control system for an energy storage container includes a temperature control component, wherein the temperature control component includes a feed pipe, a discharge pipe, and a plurality of parallel pipes arranged in parallel, wherein one end of the parallel pipe is connected to the feed pipe, and the other end is connected to the discharge pipe, and in the flow direction of a temperature control medium, an inlet valve, a temperature control unit, and an outlet valve are sequentially arranged in the parallel pipe; the temperature control unit includes a first pipe and a second pipe arranged in parallel, and in the flow direction of the temperature control medium, a first valve, a first battery module, and a second valve are sequentially arranged in the first pipe, and a third valve, a second battery module, and a fourth valve are sequentially arranged in the second pipe.

[0008] Furthermore, the temperature control unit includes a bridge tube, which is connected to the first tube and the second tube respectively, and the inlet of the bridge tube is located between the first battery module and the second valve, and the outlet of the bridge tube is located between the third valve and the second battery module, and a sixth valve is arranged in the bridge tube.

[0009] Furthermore, a bridge pipe is arranged between any two adjacent parallel pipes, and along the flow direction of the temperature control medium, the inlet of the bridge pipe is connected with the upstream parallel pipe, and the inlet of the bridge pipe is located between the temperature control unit and the outlet valve in the upstream parallel pipe, and the outlet of the bridge pipe is connected with the downstream parallel pipe, and the outlet of the bridge pipe is located between the inlet valve and the temperature control unit in the downstream parallel pipe; a bridge valve is arranged in the bridge pipe.

[0010] Furthermore, the temperature control unit includes a third tube, and the third tube is arranged in parallel with the first tube and the second tube, and only the fifth valve is arranged in the third tube.

[0011] Furthermore, the temperature control system includes a temperature regulating device, the medium inlet of the temperature regulating device is connected to the discharge pipe, and the medium outlet of the temperature regulating device is connected to the feed pipe.

[0012] Furthermore, the temperature control system includes a branch pipe and a temperature control wall, a cavity is arranged in the temperature control wall, a regulating valve is arranged between the medium inlet and the discharge pipe of the temperature control device, one end of the branch pipe is connected to the inlet side of the regulating valve, and the other end is connected to the outlet side of the regulating valve, so that a parallel relationship is formed between the branch pipe and the regulating valve; in the flow direction of the temperature control medium, a feed valve, a cavity of the temperature control wall, and a discharge valve are arranged in the branch pipe in sequence, so that the temperature control medium after heat exchange with the battery can enter the cavity of the temperature control wall through the branch pipe.

[0013] A control method for a temperature control system of an energy storage container, used for the temperature control system of the energy storage container; the control method includes a sub-regulation process and a main regulation process; the sub-regulation process can be used to regulate any temperature control unit, and the main regulation process can be used to regulate the entire temperature control component.

[0014] Further, the sub-regulation process includes: A1, obtaining the temperature Td1 of the first battery module and the temperature Td2 of the second battery module in real time; respectively calculating the absolute value T1 of the difference between Td1 and the optimal storage temperature of the battery, and the absolute value T2 of the difference between Td2 and the optimal storage temperature of the battery; A2, judging whether one of T1 and T2 is greater than the first preset value, and the other is greater than or equal to the second preset value; if so, opening the first valve, the second valve, the third valve, and the fourth valve, and closing the remaining valves in the temperature control unit; if not, proceeding to step A3; A3, judging whether No, T1>the first preset value and T2<the second preset value, or, T2>the first preset value and T1<the second preset value; if so, open the first valve and the second valve and close the remaining valves in the temperature control unit, or open the third valve and the fourth valve and close the remaining valves in the temperature control unit; if not, proceed to step A4; A4, determine whether T1 and T2 are both less than the second preset value; if so, only open the fifth valve and close the remaining valves in the temperature control unit; if not, open the first valve, the sixth valve, the fourth valve, and close the remaining valves in the temperature control unit.

[0015] Furthermore, the parent control process includes: B1, real-time acquisition of the temperature Td1 of the first battery module and the temperature Td2 of the second battery module in each temperature control unit, calculating the average temperature Tp of each temperature control unit by Td1 and Td2, and calculating the absolute value T3 of the difference between Tp and the optimal storage temperature of the battery; B2, real-time acquisition of the medium temperature Te1 at the inlet side and the medium temperature Te2 at the outlet side of each temperature control unit, and calculating the absolute value △T of the difference between Te1 and Te2; B3, for each temperature control unit, judging whether T3 is greater than a third preset value; if so, opening the inlet valve and the outlet valve in the parallel pipe where this temperature control unit is located, and connecting the outlet side of this temperature control unit to the The bridge valve of the bridge pipe is closed; if not, proceed to step B4; B4, for the temperature control unit that does not meet the judgment condition in step B3, determine whether △T is less than the fourth preset value; if so, open the inlet valve in the parallel pipe where this temperature control unit is located, and the bridge valve of the bridge pipe connected to the outlet side of this temperature control unit, and close the outlet valve in the parallel pipe where this temperature control unit is located; if not, proceed to step B5; B5, for the temperature control unit that does not meet the judgment condition in step B4, determine whether T3 is less than the fifth preset value; if so, report a fault; if not, open the inlet valve and the outlet valve in the parallel pipe where this temperature control unit is located, and close the bridge valve of the bridge pipe connected to the outlet side of this temperature control unit.

[0016] Further, Tp=(Td1+Td2)÷2; the fourth preset value is 6℃-8℃.

[0017] Compared with the prior art, the temperature control system and control method of the energy storage container described in the present invention have the following advantages:

[0018] The temperature control system and control method of an energy storage container described in the present invention form a temperature control unit by connecting two battery modules in parallel and adjusting them separately, and then form a temperature control assembly by connecting multiple temperature control units in parallel and adjusting them separately. This allows the present application to perform local temperature control adjustment on any temperature control unit in the overall temperature control system, and on this basis, to perform temperature control adjustment on each battery module in the temperature control unit one by one, which is beneficial to improving the temperature control effect and refinement of the temperature control in the energy storage container. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the accompanying drawings:

[0020] Figure 1 This is a schematic diagram of a single temperature control unit in a temperature control system of an energy storage container according to an embodiment of the present invention;

[0021] Figure 2 A schematic diagram of a temperature control assembly composed of multiple temperature control units in a temperature control system of an energy storage container according to an embodiment of the present invention;

[0022] Figure 3 For the embodiment of the present invention Figure 1 , 2 Schematic diagram of the specific settings on the basis;

[0023] Figure 4 A schematic diagram of a temperature control system for an energy storage container according to an embodiment of the present invention;

[0024] Figure 5 This is a schematic structural diagram of an energy storage container from a top view according to an embodiment of the present invention;

[0025] Figure 6 This is a structural exploded diagram of a temperature control wall of an energy storage container according to an embodiment of the present invention;

[0026] Figure 7 This is a schematic structural diagram of a temperature control bag of an energy storage container according to an embodiment of the present invention;

[0027] Figure 8 It is a schematic diagram of a temperature control wall of an energy storage container in a first state according to an embodiment of the present invention;

[0028] Fig. 9 It is a schematic diagram of a temperature control wall of an energy storage container in a second state according to an embodiment of the present invention.

[0029] Description of reference numerals:

[0030] 1. Temperature control unit; 11. Inlet pipe; 12. Outlet pipe; 13. First pipe; 131. First valve; 132. Second valve; 133. First battery module; 14. Second pipe; 141. Third valve; 142. Fourth valve; 143. Second battery module; 15. Third pipe; 151. Fifth valve; 16. Bridge pipe; 161. Sixth valve; 2. Temperature control assembly; 21. Feed pipe; 22. Outlet pipe; 23. Parallel pipe; 231. Inlet valve; 232. Outlet valve; 24. Bridge pipe; 241. Bridge valve Door; 3. Temperature control equipment; 31. Regulating valve; 32. Branch pipe; 321. Feed valve; 322. Discharge valve; 4. Temperature control wall; 41. Exterior finish; 42. Interior finish; 5. Temperature control body; 6. Lifting member; 61. Outer lifting member; 62. Inner lifting member; 7. Temperature control capsule; 71. First capsule wall; 72. Second capsule wall; 73. Third capsule wall; 74. Fixing part; 75. Capsule cavity; 8. Lifting device; 81. Outer lifter; 811. First push rod; 82. Inner lifter; 821. Second push rod. DETAILED DESCRIPTION

[0031] The inventive concepts of the present disclosure will be described below using terms commonly used by those skilled in the art to convey the essence of their work to other persons skilled in the art. However, these inventive concepts can be embodied in many different forms and should not be considered limited to the embodiments described herein.

[0032] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments of the present invention can be combined with each other. The directional terms "inside" and "outside" in this application are all referenced to the inside and outside of the energy storage container, and the "upper" and "lower" in this application are all referenced to the attached Figure 6 The coordinates of the temperature control capsule 7 are taken as the reference, and the "length direction", "width direction" and "height direction" of the temperature control capsule 7 involved in this application are all based on the attached Figure 7 As a reference, the corresponding "length, width, height" are also based on the attached Figure 7 In this application, "material" and "material" refer to the medium used for temperature control, and "in and out" have the same meaning as the common words in daily life, and are used to limit the flow direction (inflow and outflow) of the medium.

[0033] The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with embodiments.

[0034] In order to solve the problems of poor temperature control effect and low degree of refinement of temperature control in existing energy storage containers in the prior art, this embodiment proposes a temperature control system for energy storage containers, as shown in the attached Figure 1-9As shown, the temperature control system includes a temperature control component 2, and the temperature control component 2 includes a feed pipe 21, a discharge pipe 22, and a plurality of parallel pipes 23 arranged in parallel, one end of the parallel pipe 23 is connected to the feed pipe 21, and the other end is connected to the discharge pipe 22, and along the flow direction of the temperature control medium, the parallel pipe 23 is sequentially provided with an inlet valve 231, a temperature control unit 1, and an outlet valve 232;

[0035] The temperature control unit 1 includes a first tube 13 and a second tube 14 arranged in parallel. In the flow direction of the temperature control medium, a first valve 131, a first battery module 133, and a second valve 132 are sequentially arranged in the first tube 13, and a third valve 141, a second battery module 143, and a fourth valve 142 are sequentially arranged in the second tube 14.

[0036] Among them, the first battery module 133 and the second battery module 143 are both conventional battery modules in the prior art that are cooled or heated by a fluid medium, and energy storage batteries are arranged in the battery modules. For example, there are various forms of prior art in existing patents such as CN115579547A, CN218299925U, CN108134160A, CN109004316A, etc.; in view of the fact that there are many battery modules in the prior art that are temperature controlled by a fluid medium, and the present application does not intend to improve the structure of the battery module, such battery modules in the prior art can be adopted.

[0037] Therefore, the present application forms a temperature control unit 1 by connecting two battery modules in parallel and adjusting them separately, and then forms a temperature control assembly 2 by connecting multiple temperature control units 1 in parallel and adjusting them separately, so that the present application can perform local temperature control adjustment on any temperature control unit 1 in the overall temperature control system, and on this basis can perform temperature control adjustment on each battery module in the temperature control unit 1 one by one, which is beneficial to improving the temperature control effect and the degree of temperature control refinement in the energy storage container.

[0038] It should be noted that all valves in the present application have at least two states, open and closed. Accordingly, by specific adjustment of the valve, the temperature control medium flows through the battery module for specific temperature control. Of course, it is not necessary to let the temperature control medium flow through the battery module. At the same time, the present application should try to ensure that the flow rate of the temperature control medium entering each parallel tube 23 is the same under ideal conditions, and the same is true for the temperature control medium entering the first tube 13 and the second tube 14 of the temperature control unit 1.

[0039] Taking into account the convergence and diversion of the temperature control medium in the temperature control unit 1, the temperature control unit 1 can also be provided with an inlet pipe 11 that plays a diversion role and an outlet pipe 12 that plays a converging role. The inlet pipe 11 is connected to the inlet of each parallel pipeline in the temperature control unit 1, and the outlet pipe 12 is connected to the outlet of each parallel pipeline in the temperature control unit 1; in each parallel pipe 23, an inlet valve 231 is arranged at the inlet pipe 11 of the temperature control unit 1, and an outlet valve 232 is arranged at the outlet pipe 12 of the temperature control unit 1.

[0040] The temperature control unit 1 includes a bridge tube 16, which is connected to the first tube 13 and the second tube 14 respectively, and the inlet of the bridge tube 16 is located between the first battery module 133 and the second valve 132, and the outlet of the bridge tube 16 is located between the third valve 141 and the second battery module 143. A sixth valve 161 is provided in the bridge tube 16. Therefore, the setting of the bridge tube 16 enables the two battery modules in the temperature control unit 1 to be temperature controlled not only in parallel but also in series, so as to adjust the connection between the two battery modules in any temperature control unit 1 according to the specific working state of the temperature control unit 1; wherein, refer to the attached Figure 1 The series connection requires closing the second valve 132 and the third valve 141, and opening the first valve 131, the sixth valve 161, and the fourth valve 142, so that the temperature control medium can flow through the first battery module 133 and the second battery module 143 in sequence.

[0041] For the temperature control component 2, a bridge pipe 24 is arranged between any two adjacent parallel pipes 23, and along the flow direction of the temperature control medium, the inlet of the bridge pipe 24 is connected with the upstream parallel pipe 23, and the inlet of the bridge pipe 24 is located between the temperature control unit 1 and the outlet valve 232 in the upstream parallel pipe 23 (which can be regarded as the outlet pipe 12 of the temperature control unit 1 upstream of the bridge pipe 24), and the outlet of the bridge pipe 24 is connected with the downstream parallel pipe 23, and the outlet of the bridge pipe 24 is located between the inlet valve 231 and the temperature control unit 1 in the downstream parallel pipe 23 (which can be regarded as the inlet pipe 11 of the temperature control unit 1 downstream of the bridge pipe 24); a bridge valve 241 is arranged in the bridge pipe 24. Thus, by setting the bridge tube 24, any two adjacent temperature control units 1 can be temperature controlled not only in parallel but also in series. Accordingly, this setting form also enables all temperature control units 1 in the temperature control assembly 2 to be connected in parallel or in series, and can also realize that several temperature control units 1 in series can be connected in parallel with other parallel or series temperature control units 1 (referred to as "series-parallel").

[0042] At the same time, the present application integrates the temperature control unit 1 provided with the bridge tube 16 and the temperature control component 2 provided with the bridge tube 24 as shown in FIG. Figure 3As shown, from the three levels of point-by-point, local and overall, for each battery module in a point-by-point sense, the temperature control form of series or parallel adjustment can be realized, and for the temperature control unit 1 in a local sense, the temperature control forms of series, parallel, and series-parallel adjustment can be further superimposed, so that the battery modules or temperature control units 1 in different operating states can be more finely controlled, which is conducive to improving the overall refinement of temperature control in the energy storage container, helping to improve the temperature control effect, and can also minimize unnecessary power consumption due to the unified temperature control process.

[0043] Since in the actual operation process, individual temperature control units 1 may not need to adjust the temperature, for this reason, the present application makes further improvements to the temperature control unit 1, the temperature control unit 1 includes a third tube 15, the third tube 15 is arranged in parallel with the first tube 13 and the second tube 14, and only the fifth valve 151 is arranged in the third tube 15; thus, the third tube 15 is used as an overhead pipeline. If a certain temperature control unit 1 does not need to adjust the temperature, the fifth valve 151 can be opened, and the first valve 131, the second valve 132, the third valve 141, and the fourth valve 142 can be closed, so that the temperature control medium does not flow through the battery module in the temperature control unit 1, and the overhead effect on the battery module is achieved; at the same time, this form is combined with the overall temperature control component 2, so that in the overall temperature control process, especially for the temperature control units 1 that are in a series relationship, if one of the temperature control units 1 does not need to adjust the temperature, the temperature control medium can be directly flowed to the downstream temperature control unit 1 through the overhead effect of the third tube 15 in the temperature control unit 1, thereby not affecting the regulation of the upstream and downstream temperature control units 1.

[0044] Based on the temperature control component 2, the temperature control system includes a temperature control device 3, the medium inlet of the temperature control device 3 is connected to the discharge pipe 22, and the medium outlet of the temperature control device 3 is connected to the feed pipe 21; the temperature control device 3 is a device that can adjust and change the temperature of the temperature control medium, for example, a heat exchange device for exchanging heat with the temperature control medium, a heat pump external unit and other conventional temperature control equipment, so that the temperature control medium after heat exchange with the battery can be adjusted to the medium temperature required by the temperature control system after heat exchange and temperature adjustment by the temperature control device 3. Accordingly, the temperature control device 3 can directly adopt the existing technology, and the present application does not improve its own structure.

[0045] The temperature control process of the present application includes cooling and heating in conventional temperature control technology; in the cooling process, the temperature control medium is cooled by the temperature control device 3, and then the battery module is cooled by the relatively low temperature temperature control medium; in the heating process, the temperature control medium is heated by the temperature control device 3, and then the battery module is heated or kept warm by the relatively high temperature temperature control medium.

[0046] As a preferred solution of the present application, the temperature control medium can be carbon dioxide, which can provide better fluid fluidity and better heat transfer effect on the one hand, and on the other hand, even if leakage of the temperature control medium occurs, it will not cause unnecessary pollution, corrosion of equipment, etc. Even in some extreme cases, the leakage of carbon dioxide can also provide a certain inhibitory effect on the combustion of electrical components.

[0047] In addition to direct temperature control of each battery module, based on the pipeline layout and load margin of the temperature control system, the present application further improves the temperature control system, taking into account the heat transfer effect between the energy storage container and the outside world, aiming to maximize the temperature control effect in the energy storage container. Specifically: the temperature control system includes a branch pipe 32 and a temperature control wall 4, wherein a cavity 75 is arranged in the temperature control wall 4, and the temperature control wall 4 can serve as a shell structure of an energy storage container. A regulating valve 31 is arranged between the medium inlet of the temperature control device 3 and the discharge pipe 22, and one end of the branch pipe 32 is connected to the inlet side of the regulating valve 31, and the other end is connected to the outlet side of the regulating valve 31, so that a parallel relationship is formed between the branch pipe 32 and the regulating valve 31. In the flow direction of the temperature control medium, a feed valve 321, a cavity 75 of the temperature control wall 4, and a discharge valve 322 are arranged in sequence in the branch pipe 32, so that the temperature control medium after heat exchange with the battery can enter the cavity 75 of the temperature control wall 4 through the branch pipe 32, thereby achieving the purpose of regulating the heat transfer between the energy storage container and the outside world.

[0048] The temperature control wall 4 serves as the shell structure of the energy storage container, including an outer surface 41, a temperature control body 5, and an inner surface 42 arranged in sequence from the outside to the inside; the temperature control body 5 includes a lifting member 6 and a temperature control capsule 7, the lifting member 6 can move up and down in the vertical direction, the temperature control capsule 7 has a capsule cavity 75, and the capsule cavity 75 can be filled with a temperature control medium. The temperature control capsule 7 is connected to the lifting member 6, and the temperature control capsule 7 can be deformed as the lifting member 6 is lifted and lowered. In the direction from the inside to the outside, the cross-section of the temperature control capsule 7 can be deformed to extend obliquely upward or obliquely downward. Among them, the present application sets a temperature control body 5 in the temperature control wall 4 of the energy storage container, not only to block the heat transfer between the energy storage container and the outside world, but also to adjust the two deformation forms of the temperature control bag 7 so that the heat transfer medium forms an overall flow circulation in the temperature control bag 7 or a local circulation near the bag wall under the action of "heat rise and cold drop", so as to accelerate heat transfer or block heat transfer, and supplement the energy storage container with heat (cold) from the external environment, or block the heat transfer between the energy storage container and the outside world, which is specifically introduced as follows.

[0049] For the sake of simplicity in the following description, in the direction from inside to outside, the cross section of the temperature control capsule 7 is tilted upward as the first state (see FIG. Figure 8The cross section of the temperature control capsule 7 is tilted downward as the second state (as shown in the attached Fig. 9 shown).

[0050] Attach Figure 8 Take the first state in as an example, for the description of a single temperature control capsule 7 and its capsule cavity 75.

[0051] Case 1: If the internal temperature of the energy storage container is relatively higher than the external environment temperature, the heat-conducting medium near the inner side of the cavity 75 will rise due to the heat, and move along the upper first cavity wall 71 to the highest point near the outer side, and the heat-conducting medium near the outer side of the cavity 75 will fall due to the cold, and move along the lower first cavity wall 71 to the lowest point near the inner side, so that the heat-conducting medium forms an overall flow cycle in the temperature control cavity 7 to promote heat transfer between the energy storage container and the outside world, and use the cold energy of the external environment to supplement the energy storage container, which is conducive to reducing the refrigeration load on the internal environment of the energy storage container and reducing the corresponding energy consumption;

[0052] Case 2: If the internal temperature of the energy storage container is relatively lower than the external ambient temperature, the heat-conducting medium near the inner side of the cavity 75 will cool down, forming a local medium flow near the inner side of the cavity 75, and tending to gather at the lowest point near the inner side of the cavity 75; the heat-conducting medium near the outer side of the cavity 75 will rise due to the heat, forming a local medium flow near the outer side of the cavity 75, and tending to gather at the highest point near the outer side of the cavity 75; thereby forming a local medium flow on both sides of the temperature control capsule 7, forming a certain medium flow dead zone in the middle of the temperature control capsule 7, forming a dead zone that blocks heat transfer, delaying the "erosion" of the low temperature inside the energy storage container by the external high temperature, so that the inside of the energy storage container can better maintain a low temperature, and delaying the loss of cold energy inside the energy storage container.

[0053] For the attached Fig. 9 As for the second state, when the heat transfer medium is in the flow state of "heat rise and cold drop", there are also scenarios similar to those in Case 1 and Case 2, which will not be repeated in this article.

[0054] The lifting member 6 includes an outer lifting member 61 and an inner lifting member 62. One side of the temperature control capsule 7 is connected to the outer lifting member 61, and the other side is connected to the inner lifting member 62. As the outer lifting member 61 moves upward or the inner lifting member 62 moves upward, the temperature control capsule 7 can be driven to deform to form a first state or a second state. Preferably, the temperature control capsule 7 is approximately in the shape of a rectangular parallelepiped in the undeformed state, and has two oppositely arranged first capsule walls 71, two oppositely arranged second capsule walls 72, and two oppositely arranged third capsule walls 73. The first capsule wall 71 and the second capsule wall 72 are flexible walls with a certain deformation extension ability, and can be made of rubber materials in the prior art. As for the third capsule wall 73, since the temperature control capsule 7 needs to be connected to the lifting member 6, the third capsule wall 73 can be a rigid wall plate, or a rigid plate can be embedded in the flexible wall, which can provide support for the deformation of the temperature control capsule 7 while ensuring the connection strength. The present application preferably connects the temperature control capsule 7 to the lifting member 6 through the third capsule wall 73, or utilizes the rigid support of the third capsule wall 73 and provides a corresponding fixing portion 74 at the third capsule wall 73 for connection. As a preferred solution of the present application, the third capsule wall 73 of the temperature control capsule 7 can be fitted with the outer surface 41 or the inner surface 42, that is, one third capsule wall 73 of the temperature control capsule 7 is fitted with the outer surface 41, and the other third capsule wall 73 is fitted with the inner surface 42.

[0055] The outer lifting member 61 moves upward relative to the inner lifting member 62 (e.g., the outer lifting member 61 rises, while the inner lifting member 62 remains in place or descends to the original position), and the cross section of the temperature control capsule 7 is deformed from the inside to the outside to extend obliquely upward. The inner lifting member 62 moves upward relative to the outer lifting member 61 (e.g., the inner lifting member 62 rises, while the outer lifting member 61 remains in place or descends to the original position), and the cross section of the temperature control capsule 7 is deformed from the inside to the outside to extend obliquely downward. The original position can be understood as the initial position of the lift, which can be lifted upward from the initial position and can only be lowered to the initial position. Please refer to the attached Figure 6 The initial state is shown.

[0056] In order to avoid ambiguity or misunderstanding, with respect to the relative movement between the outer lifting member 61 and the inner lifting member 62, the rise of the outer lifting member 61 or the inner lifting member 62 in the present application must be accompanied by the lifting member on the other side remaining in place or descending to the original position, so that the temperature control body 5 can only be adjusted in displacement and deformation at a relatively small height. The outer lifting member 61 and the inner lifting member 62 can be a square frame, a flat plate, etc., or can be as shown in the attached Figure 6 Multiple pole forms shown.

[0057] Regarding the connection between the temperature control capsule 7 and the lifting member 6, the two sides of the temperature control capsule 7 are respectively provided with fixing parts 74, and the fixing parts 74 and the lifting member 6 are connected by at least one of a clamping, bonding, and a fastener fixing connection, and the specific forms can be referred to as follows:

[0058] Form 1: If the lifting member 6 is in the form of a square frame, claws are set on both sides of the temperature control bag 7 to be stuck in the corresponding square frame, or the two sides of the temperature control bag 7 are placed in the square frame; or the square frame is provided with hanging holes, and corresponding hooks can be set on both sides of the temperature control bag 7 to hang the temperature control bag 7 on the square frame; at the same time, the third bag wall 73 can also be connected to the square frame through fasteners.

[0059] Form 2: If the lifting member 6 is in the form of a flat plate, adhesive layers can be provided on both sides of the temperature control capsule 7 and bonded to the flat plate through the adhesive layer; at the same time, the third capsule wall 73 can also be connected to the flat plate through fasteners.

[0060] Form 3: If the lifting member 6 is attached Figure 6 The vertical pole form shown in the figure can adopt the claw clamping or hook mounting form in form 1, or it can be Figure 7 As shown, through openings are provided on both sides of the temperature control bag 7, and the vertical rods are provided in the through openings.

[0061] The temperature control capsule 7 may be a whole large capsule, whose capsule cavity 75 is connected to the branch pipe 32. However, considering the flow efficiency of the heat-conducting medium, the preferred solution of the present application is that the temperature control body 5 includes a plurality of temperature control capsules 7 arranged in sequence from bottom to top, and the capsule cavity 75 of any one of the temperature control capsules 7 is connected to the branch pipe 32. Combined with the connection between the temperature control capsule 7 and the lifting member 6, the plurality of temperature control capsules 7 may be arranged in an upper and lower stacked form and connected to the lifting member 6 one by one.

[0062] For the up and down movement of the lifting member 6, the temperature control body 5 includes a lifting device 8, which has a lifting rod that can be lifted and lowered, and the lifting rod of the lifting device 8 is connected to the bottom end of the lifting member 6 to drive the lifting member 6 to move up and down. The lifting device 8 can adopt conventional hydraulic or pneumatic lifting devices, mechanical lifting devices, spiral lifting devices, etc. in the prior art.

[0063] In order to facilitate the introduction of the inside and outside below, the lifting member 6 close to the external environment is recorded as the outside lifting member 61, and the lifting member 6 close to the inside of the energy storage container is recorded as the inside lifting member 62. The jacking device 8 is also provided with corresponding jacking devices, which are respectively recorded as the outside jacking device 81 and the inside jacking device 82. The outside jacking device 81 is connected to the bottom end of the outside lifting member 61, and the inside jacking device 82 is connected to the bottom end of the inside lifting member 62.

[0064] Attach Figure 8For example, the first push rod 811 of the outer lifter 81 is lifted upward, and drives the outer lifting member 61 to move upward, so that the temperature control bag 7 is in the first state. At this time, the inner lifter 82 is in a non-lifted state.

[0065] Attach Fig. 9 For example, the second push rod 821 of the inner lifter 82 is lifted upward, and drives the inner lifting member 62 to move upward, so that the temperature control bag 7 is in the second state. At this time, the outer lifter 81 is in a non-lifted state.

[0066] In order to improve the intelligent operation level of the temperature control system, the temperature control system includes a central processing unit and a battery module temperature sensor. The central processing unit is connected to each valve in the present application, at least for regulating the opening and closing states of each valve, and of course, the opening of each valve can also be further adjusted. Each battery module of the present application is provided with a battery module temperature sensor, and the central processing unit is connected to each battery module temperature sensor to obtain the temperature Td of the battery module in real time. For any temperature control unit 1, the inlet pipe 11 and the outlet pipe 12 are respectively provided with medium temperature sensors, and the central processing unit is connected to each medium temperature sensor to obtain the medium temperature Te1 (inlet side medium temperature) of the temperature control unit 1 in the inlet pipe 11 and the medium temperature Te2 (outlet side medium temperature) of the temperature control unit 1 in the outlet pipe 12 in real time.

[0067] On this basis, the present application proposes a control method for a temperature control system of an energy storage container, including a sub-control process for the temperature control unit 1 and a main control process for the temperature control component 2;

[0068] The sub-regulation process can be used to regulate any temperature control unit 1, including:

[0069] A1. Real-time acquisition of the temperature Td1 of the first battery module 133 and the temperature Td2 of the second battery module 143; respectively calculating the absolute value T1 of the difference between Td1 and the optimal storage temperature of the battery, and the absolute value T2 of the difference between Td2 and the optimal storage temperature of the battery;

[0070] The optimal storage temperature of the battery may be the recommended temperature value of the battery manufacturer, or the optimal storage temperature generally recognized in the battery field, such as a temperature value within 20°C±5°C. The present application recommends that 20°C may be preferred.

[0071] A2, determine whether one of T1 and T2 is greater than the first preset value, and the other is greater than or equal to the second preset value; if so, open the first valve 131, the second valve 132, the third valve 141, and the fourth valve 142, and close the remaining valves in the temperature control unit 1; if not, proceed to step A3;

[0072] A3, determine whether T1> the first preset value and T2< the second preset value, or T2> the first preset value and T1< the second preset value; if so, open the first valve 131 and the second valve 132 and close the remaining valves in the temperature control unit 1, or open the third valve 141 and the fourth valve 142 and close the remaining valves in the temperature control unit 1; if not, proceed to step A4;

[0073] A4. Determine whether T1 and T2 are both less than the second preset value; if so, only open the fifth valve 151 and close the remaining valves in the temperature control unit 1; if not, open the first valve 131, the sixth valve 161, and the fourth valve 142, and close the remaining valves in the temperature control unit 1.

[0074] Among them, the first preset value>the second preset value; accordingly, a temperature greater than the first preset value can be regarded as a temperature preset value that requires independent temperature control, and a temperature less than the second preset value can be regarded as a temperature preset value that does not require temperature control. In view of the different temperature control requirements and safety requirements in actual energy storage containers, the temperature control system has different cooling and heating capabilities for the temperature control medium, so that the first preset value and the second preset value need to be set according to actual conditions. This application does not specifically limit the specific values ​​of the first preset value and the second preset value, but only provides individual numbers as examples, and this application is not limited to the numbers provided as examples. For example, the first preset value is a value between 30℃ and 40℃, and the second preset value is a value between 4℃ and 8℃.

[0075] It should be noted that in this application, the first battery module 133 and the second battery module 143 in a temperature control unit 1 are in a state of being set as close to each other as possible, and the overall environment in the entire energy storage container, in the actual operation process, Td1 and Td2 will be in a similar temperature range, and often require cooling or heating in the same direction, and basically there will be no such extreme situation that one needs cooling and the other needs heating. Of course, if such an extreme situation occurs, an alarm and inspection can be issued in time. At the same time, the judgment conditions in the sub-regulation process and the parent regulation process of this application all use absolute values, so as to no longer distinguish between heating and cooling, and avoid confusion or interference in the understanding of the solution due to the difference in positive and negative signs in heating and cooling.

[0076] Therefore, the present application can be used to regulate any temperature control unit 1 through the sub-regulation process, and can adjust the various valve conditions of the temperature control unit 1 according to the actual conditions of the two battery modules in the temperature control unit 1, so as to adjust the temperature control state of the battery module and improve the degree of temperature control refinement.

[0077] The parent control process can be used to control the entire temperature control component 2, including:

[0078] B1, obtaining the temperature Td1 of the first battery module 133 and the temperature Td2 of the second battery module 143 in each temperature control unit 1 in real time, calculating the average temperature Tp of each temperature control unit 1 based on Td1 and Td2, and calculating the absolute value T3 of the difference between Tp and the optimal storage temperature of the battery;

[0079] Among them, since each temperature control unit 1 has two battery modules, Tp=(Td1+Td2)÷2, the optimal storage temperature of the battery is consistent with the above and will not be repeated.

[0080] B2. Real-time acquisition of the medium temperature Te1 at the inlet side (i.e., in the inlet pipe 11) and the medium temperature Te2 at the outlet side (i.e., in the outlet pipe 12) of each temperature control unit 1, and calculation of the absolute value △T of the difference between Te1 and Te2;

[0081] B3. For each temperature control unit 1, determine whether T3 is greater than the third preset value; if so, open the inlet valve 231 and the outlet valve 232 in the parallel pipe 23 where the temperature control unit 1 is located, and close the bridge valve 241 of the bridge pipe 24 connected to the outlet side of the temperature control unit 1; if not, proceed to step B4;

[0082] B4. For the temperature control unit 1 that does not meet the determination condition in step B3, determine whether ΔT is less than a fourth preset value; if so, open the inlet valve 231 in the parallel pipe 23 where the temperature control unit 1 is located, and the bridge valve 241 of the bridge pipe 24 connected to the outlet side of the temperature control unit 1, and close the outlet valve 232 in the parallel pipe 23 where the temperature control unit 1 is located; if not, proceed to step B5;

[0083] B5. For the temperature control unit 1 that does not meet the judgment condition in step B4, determine whether T3 is less than the fifth preset value; if so, report a fault; if not, open the inlet valve 231 and the outlet valve 232 in the parallel pipe 23 where this temperature control unit 1 is located, and close the bridge valve 241 of the bridge pipe 24 connected to the outlet side of this temperature control unit 1.

[0084] Among them, the third preset value> the fifth preset value; accordingly, a temperature greater than the third preset value can be regarded as a temperature preset value that requires independent temperature control of the temperature control unit 1, a temperature less than the fifth preset value can be regarded as a temperature preset value that does not require independent temperature control of the temperature control unit 1, and a temperature less than the fourth preset value can be regarded as a small change in the temperature difference of the refrigerant flowing through the temperature control unit 1. In view of the different temperature control requirements and safety requirements in actual energy storage containers, the temperature control system has different cooling and heating capabilities for the temperature control medium, so that the third preset value, the fourth preset value, and the fifth preset value need to be set according to actual conditions. The present application does not specifically limit the specific values ​​of the third preset value, the fourth preset value, and the fifth preset value, and only provides individual numbers as examples, and the present application is not limited to the numbers provided as examples. For example, the third preset value is a value of 26°C-35°C, the fifth preset value is a value of 3°C-5°C, and the fourth preset value is a value of 6°C-8°C.

[0085] Therefore, on the basis of the sub-regulation process, the present application further proposes a parent regulation process. In the parent regulation process, each battery module is no longer regulated one by one, but each temperature control unit 1 is taken as the smallest unit. The valves in each parallel pipe 23 and bridge pipe 24 are regulated by the current state of the temperature control unit 1 and the temperature difference change of the refrigerant flowing through the temperature control unit 1, so as to adjust the temperature control state of each temperature control unit 1, which is helpful to improve the degree of refinement of temperature control, and is conducive to improving the temperature control effect in the energy storage container, and can also reduce the unnecessary power consumption due to the unified temperature control process as much as possible. In addition, when T3 is small, by combining the analysis of the change of the refrigerant temperature difference (step B4) and the secondary analysis of T3 (step B5), the possible faults of the temperature control system can be timely and effectively identified, so that the operator can check in time and ensure the long-term stable operation of the temperature control system and the energy storage container.

[0086] In addition, when the feed valve 321 and the discharge valve 322 are opened, the temperature control system can enable the temperature control wall 4 to regulate the heat transfer between the energy storage container and the outside world; the present application further introduces the control process of the temperature control body 5, the temperature control system also includes an in-box temperature sensor and an ambient temperature sensor, the central processor is respectively connected to the in-box temperature sensor and the ambient temperature sensor to obtain the in-box temperature Tn of the energy storage container and the outdoor ambient temperature Tw, the central processor is connected to the temperature control body 5, and is used to regulate the operation of the temperature control body 5. Specifically, the control method of the temperature control system also includes the control process of the temperature control body 5.

[0087] The control process of the temperature control body 5 includes:

[0088] S1, real-time acquisition of the temperature inside the box Tn and the ambient temperature Tw;

[0089] S2, determine whether Tn-Tw> the first preset temperature; if so, proceed to step S3; if not, proceed to step S5;

[0090] The first preset temperature is 0° C. to 2° C., so as to determine the situation where Tn>Tw and there is a certain temperature difference between the two.

[0091] S3, judging whether Tn≥high temperature warning value; if so, driving the outer lifting member 61 to move upward relative to the inner lifting member 62, and returning to step S1; if not, proceeding to step S4;

[0092] Among them, the high temperature warning value is 45℃~50℃; when Tn>Tw, if Tn is too high, the outer lifting member 61 rises, so that the temperature control bag 7 is deformed into the first state, so that the heat transfer medium forms an overall flow cycle in the temperature control bag 7 to promote the heat dissipation of the energy storage container to the outside, thereby using the relative coldness of the external environment to supplement the energy storage container, which is conducive to reducing the refrigeration load in the energy storage container to reduce energy consumption. It should be noted that when Tn is too high in step S3, this application performs refrigeration control through the sub-control process and the parent control process in the previous text.

[0093] S4, judging whether Tn≤low temperature warning value; if so, driving the inner lifting member 62 to move upward relative to the outer lifting member 61, and performing heating control through the sub-control process and the main control process described above; if not, returning to step S1;

[0094] Among them, the low temperature warning value is -15℃~-20℃; when Tn>Tw, if Tn is still too low, the inner lifting member 62 rises, so that the temperature control bag 7 is deformed to the second state, so that the heat-conducting medium forms only local medium flow on both sides of the temperature control bag 7, and forms a medium flow dead zone that blocks heat transfer in the middle of the temperature control bag 7, delaying the further "erosion" of the outside low temperature on the inside of the energy storage container, forming an effect similar to "insulation" on the inside of the energy storage container, and avoiding heat dissipation from the inside of the energy storage container to the outside as much as possible. At the same time, the sub-control process and the main control process mentioned above can be used to control heating to avoid the internal temperature of the energy storage container being too low.

[0095] S5, judging whether Tn-Tw<the second preset temperature; if so, proceeding to step S6; if not, performing temperature control according to the sub-control process and the main control process, and returning to step S1;

[0096] The second preset temperature is 0℃~-2℃ to judge the situation that Tn<Tw and there is a certain temperature difference between the two. It should be noted that if Tn=Tw or the temperature difference between the two is very small, there is no need to consider the regulation of the temperature control body 5, and only the sub-regulation process and the main regulation process are performed for temperature control.

[0097] S6, judging whether Tn ≥ high temperature warning value; if so, driving the outer lifting member 61 to move upward relative to the inner lifting member 62, and performing cooling control through the sub-control process and the main control process described above; if not, proceeding to step S7;

[0098] Among them, the high temperature warning value is 45℃~50℃; when Tn<Tw, if Tn is still too high, the outer lifting member 61 rises, so that the temperature control bag 7 is deformed to the first state, so that the heat-conducting medium forms only local medium flow on both sides of the temperature control bag 7, and forms a medium flow dead zone that blocks heat transfer in the middle of the temperature control bag 7, delaying the further "erosion" of the internal energy storage container by the external high temperature, forming an effect similar to "insulation" on the internal energy storage container, avoiding heat transfer from the outside to the internal energy storage container as much as possible, and at the same time, refrigeration control is performed through the sub-control process and the main control process mentioned above to avoid excessive temperature inside the energy storage container.

[0099] S7, judging whether Tn≤low temperature warning value; if so, driving the inner lifting member 62 to move upward relative to the outer lifting member 61, and returning to step S1; if not, returning to step S1.

[0100] Among them, the low temperature warning value is -15℃~-20℃; when Tn<Tw, if Tn is too low, the inner lifting member 62 rises, so that the temperature control bag 7 is deformed into the second state, so that the heat transfer medium forms an overall flow cycle in the temperature control bag 7 to promote heat transfer between the energy storage container and the outside world, thereby using the relative heat of the external environment to supplement the energy storage container, which is beneficial to reduce the heating load of the temperature control system to reduce energy consumption. It should be noted that when Tn is too low in step S7, heating control can be performed through the sub-control process and the main control process mentioned above.

[0101] Therefore, the control process of the temperature control body 5 proposed in the present application analyzes the conditions of Tn and Tw to adjust the movement state of the temperature control body 5 accordingly, so that the temperature control bag 7 is in a specific state, and the heat transfer medium can form an overall flow circulation in the temperature control bag 7 or a local circulation near the bag wall under the action of "heat rise and cold drop" as needed to accelerate heat transfer or block heat transfer, and reduce the operating load of the temperature control system by utilizing the heat (cold) of the external environment to supplement the energy storage container, or by blocking the heat transfer between the energy storage container and the outside world, so as to reduce energy consumption.

[0102] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A temperature control system for an energy storage container, characterized in that: The temperature control system comprises a temperature control component (2), the temperature control component (2) comprises a feed pipe (21), a discharge pipe (22) and a plurality of parallel pipes (23) arranged in parallel, one end of the parallel pipe (23) is connected to the feed pipe (21), and the other end is connected to the discharge pipe (22), and in the flow direction of the temperature control medium, an inlet valve (231), a temperature control unit (1), and an outlet valve (232) are arranged in sequence in the parallel pipe (23); the temperature control unit (1) comprises a first pipe (13) and a second pipe (14) arranged in parallel, in the flow direction of the temperature control medium, a first valve (131), a first battery module (133), and a second valve (132) are arranged in sequence in the first pipe (13), and a third valve (141), a second battery module (143), and a fourth valve (142) are arranged in sequence in the second pipe (14).

2. The temperature control system of an energy storage container according to claim 1, characterized in that: The temperature control unit (1) comprises a bridge tube (16), the bridge tube (16) being connected to the first tube (13) and the second tube (14) respectively, and the inlet of the bridge tube (16) being located between the first battery module (133) and the second valve (132), and the outlet of the bridge tube (16) being located between the third valve (141) and the second battery module (143), and a sixth valve (161) being arranged in the bridge tube (16).

3. The temperature control system for an energy storage container according to claim 1, characterized in that: A bridge pipe (24) is provided between any two adjacent parallel pipes (23); in the flow direction of the temperature control medium, the inlet of the bridge pipe (24) is connected to the upstream parallel pipe (23), and the inlet of the bridge pipe (24) is located between the temperature control unit (1) and the outlet valve (232) in the upstream parallel pipe (23); the outlet of the bridge pipe (24) is connected to the downstream parallel pipe (23), and the outlet of the bridge pipe (24) is located between the inlet valve (231) and the temperature control unit (1) in the downstream parallel pipe (23); a bridge valve (241) is provided in the bridge pipe (24).

4. The temperature control system for an energy storage container according to claim 1, characterized in that: The temperature control unit (1) comprises a third tube (15), wherein the third tube (15) is arranged in parallel with the first tube (13) and the second tube (14), and a fifth valve (151) is arranged in the third tube (15).

5. The temperature control system for an energy storage container according to claim 1, characterized in that: The temperature control system comprises a temperature control device (3), the medium inlet of the temperature control device (3) is connected to a discharge pipe (22), and the medium outlet of the temperature control device (3) is connected to a feed pipe (21).

6. The temperature control system for an energy storage container according to claim 5, characterized in that: The temperature control system comprises a branch pipe (32) and a temperature control wall (4), wherein a capsule cavity (75) is arranged in the temperature control wall (4), and a regulating valve (31) is arranged between the medium inlet of the temperature control device (3) and the discharge pipe (22), wherein one end of the branch pipe (32) is connected to the inlet side of the regulating valve (31), and the other end is connected to the outlet side of the regulating valve (31), so that a parallel relationship is formed between the branch pipe (32) and the regulating valve (31); in the flow direction of the temperature control medium, a feed valve (321), a capsule cavity (75) of the temperature control wall (4), and a discharge valve (322) are arranged in sequence in the branch pipe (32), so that the temperature control medium after heat exchange with the battery can enter the capsule cavity (75) of the temperature control wall (4) through the branch pipe (32).

7. A method for controlling a temperature control system of an energy storage container, characterized in that: The control method is used for a temperature control system of an energy storage container as described in any one of claims 1 to 6; the control method includes a sub-regulation process and a main regulation process; the sub-regulation process can be used to regulate any temperature control unit (1), and the main regulation process can be used to regulate the entire temperature control component (2).

8. The control method of the temperature control system of the energy storage container according to claim 7, characterized in that: The sub-regulation process includes: A1, acquiring in real time the temperature Td1 of the first battery module (133) and the temperature Td2 of the second battery module (143); respectively calculating the absolute value T1 of the difference between Td1 and the optimal storage temperature of the battery, and the absolute value T2 of the difference between Td2 and the optimal storage temperature of the battery; A2, determining whether one of T1 and T2 is greater than a first preset value, and the other is greater than or equal to a second preset value; if so, opening the first valve (131), the second valve (132), the third valve (141), and the fourth valve (142), and closing the remaining valves in the temperature control unit (1); if not, proceeding to step A3; A3, determining whether T1> the first preset value and T2< the second preset value, or T2> the first preset value and T1< the second preset value; if so, opening the first valve (131) and the second valve (132) and closing the remaining valves in the temperature control unit (1), or opening the third valve (141) and the fourth valve (142) and closing the remaining valves in the temperature control unit (1); if not, proceeding to step A4; A4. Determine whether T1 and T2 are both less than a second preset value; if so, only open the fifth valve (151) and close the remaining valves in the temperature control unit (1); if not, open the first valve (131), the sixth valve (161), and the fourth valve (142), and close the remaining valves in the temperature control unit (1).

9. The control method of the temperature control system of the energy storage container according to claim 7, characterized in that: The mother regulation process includes: B1, obtaining in real time the temperature Td1 of the first battery module (133) and the temperature Td2 of the second battery module (143) in each temperature control unit (1), calculating the average temperature Tp of each temperature control unit (1) from Td1 and Td2, and calculating the absolute value T3 of the difference between Tp and the optimal storage temperature of the battery; B2. Real-time acquisition of the medium temperature Te1 at the inlet side and the medium temperature Te2 at the outlet side of each temperature control unit (1), and calculation of the absolute value △T of the difference between Te1 and Te2; B3. For each temperature control unit (1), determine whether T3 is greater than a third preset value; if so, open the inlet valve (231) and the outlet valve (232) in the parallel pipe (23) where the temperature control unit (1) is located, and close the bridge valve (241) of the bridge pipe (24) connected to the outlet side of the temperature control unit (1); if not, proceed to step B4; B4. For the temperature control unit (1) that does not meet the judgment condition in step B3, determine whether ΔT is less than a fourth preset value; if so, open the inlet valve (231) in the parallel pipe (23) where the temperature control unit (1) is located, and the bridge valve (241) of the bridge pipe (24) connected to the outlet side of the temperature control unit (1), and close the outlet valve (232) in the parallel pipe (23) where the temperature control unit (1) is located; if not, proceed to step B5; B5. For the temperature control unit (1) that does not meet the judgment condition in step B4, determine whether T3 is less than the fifth preset value; if so, report a fault; if not, open the inlet valve (231) and the outlet valve (232) in the parallel pipe (23) where the temperature control unit (1) is located, and close the bridge valve (241) of the bridge pipe (24) connected to the outlet side of the temperature control unit (1).

10. The control method of the temperature control system of the energy storage container according to claim 9, characterized in that: Tp=(Td1+Td2)÷2; the fourth preset value is 6℃-8℃.

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