Electrolyte storage tank and flow battery system

Abstract

Disclosed is an electrolyte storage tank and a liquid flow battery system, wherein the electrolyte storage tank comprises: a tank body having an electrolyte inlet and an electrolyte outlet; a heat exchanger comprising a heat exchange tube at least partially located in the tank body, the heat exchange tube having an input end for inputting a cooling medium and an output end for outputting a cooling medium; an electrolyte distributor disposed in the tank body and above the heat exchange tube, the electrolyte distributor being provided with a plurality of openings; wherein the electrolyte distributor is configured to receive the electrolyte input from the electrolyte inlet, the received electrolyte being distributed to a plurality of openings, and falling from the plurality of openings to the heat exchange tube for heat exchange, and then falling from the heat exchange tube to the space at the bottom of the tank body. The solution provided by the embodiment of the present application can improve the heat exchange efficiency of the liquid flow battery, and has a compact structure, which can reduce the transportation space and the installation space.

Description

Technical Field

[0001] The present invention relates to the field of battery technology, and in particular to an electrolyte storage tank and a liquid flow battery system. Background Art

[0002] As new clean energy gradually replaces traditional energy, energy storage systems, as an indispensable part of the new clean energy system, play a supporting role in the entire new power generation industry. Since new clean power generation energy (such as wind energy, solar energy, etc.) is greatly affected by natural environmental factors and it is difficult to continuously output stable and safe electricity, it is very important to use energy storage batteries as a connecting part of new power generation energy. In the field of energy storage batteries, since liquid flow batteries release heat during the discharge process, if the generated heat cannot be taken away in time, it will affect the discharge efficiency of the battery, and long-term accumulation will lead to failure of the battery system.

[0003] The current heat exchange structure has disadvantages in the way liquid flow batteries exchange heat. For example, the heat exchange structure causes the liquid flow battery system to be larger in size, requiring a larger space for transportation and installation, and the heat exchange efficiency of the heat exchange structure is low. Therefore, it is necessary to find new ways to exchange heat for liquid flow batteries. Summary of the invention

[0004] The embodiments of the present application provide an electrolyte storage tank and a liquid flow battery system to solve the problems of large heat exchange structure volume and low heat exchange efficiency of current liquid flow batteries.

[0005] The present application embodiment provides an electrolyte storage tank comprising:

[0006] A box body having an electrolyte inlet and an electrolyte outlet;

[0007] A heat exchanger, comprising a heat exchange tube at least partially located in the box body, the heat exchange tube having an input end for inputting a cooling medium and an output end for outputting the cooling medium;

[0008] An electrolyte distributor is disposed in the box and above the heat exchange tube, and the electrolyte distributor is provided with a plurality of openings;

[0009] Among them, the electrolyte distributor is configured to receive the electrolyte input from the electrolyte inlet, and the received electrolyte is distributed to multiple openings, and falls from the multiple openings to the heat exchange tubes for heat exchange, and then falls from the heat exchange tubes to the space at the bottom of the box.

[0010] In one embodiment, a plurality of heat exchange tubes are arranged side by side, and the heat exchanger further comprises an input end plate and an output end plate, wherein the input end plate and the output end plate are respectively provided with a plurality of mounting holes, the input end of the heat exchange tube is connected to the mounting hole of the input end plate, and the output end is connected to the mounting hole of the output end plate;

[0011] The heat exchanger also includes a medium input component connected to the input end plate and a medium output component connected to the output end plate, the medium input component is connected to the input end plate to input cooling medium into the mounting hole of the input end plate, and the medium output component is connected to the output end plate to receive and output the cooling medium flowing out of the mounting hole of the output end plate.

[0012] In one embodiment, the cooling medium is a cooling liquid;

[0013] The medium input component is provided with a coolant distribution chamber and a coolant inlet connected to the coolant distribution chamber, a coolant uniform distribution plate is provided between the coolant distribution chamber and the input end plate, and the coolant uniform distribution plate has a plurality of water holes so that the coolant in the coolant distribution chamber enters the transition space between the coolant uniform distribution plate and the input end plate through the plurality of water holes.

[0014] In one embodiment, the cooling medium is a cooling airflow;

[0015] The medium input component is an input air duct connected to the input end plate, and the medium output component is an output air duct connected to the output end plate.

[0016] In one embodiment, the input air duct and the output air duct are respectively provided with drain ports for draining condensed water.

[0017] In one embodiment, end plate mounting openings are respectively provided on opposite sides of the box body, the input end plate and the output end plate are respectively installed on the end plate mounting openings on both sides, and the medium input component and the medium output component are respectively installed on the outside of the box body.

[0018] In one embodiment, the heat exchanger further includes at least one support plate located between the input end plate and the output end plate, the support plate is configured to be installed on the box body, and the plurality of heat exchange tubes all pass through the support plate.

[0019] In one embodiment, the heat exchange tube is a flexible tube, and hard connecting tubes are respectively inserted into the input end and the output end of the heat exchange tube, and the connecting tubes are inserted into the mounting holes and fixed.

[0020] In one embodiment, the electrolyte distributor includes an electrolyte distribution plate and a baffle. The electrolyte distribution plate is installed between the electrolyte inlet and the heat exchange tube, and a plurality of openings are arranged on the electrolyte distribution plate. The baffle is arranged above the electrolyte distribution plate and corresponds to the electrolyte inlet. The electrolyte input into the electrolyte inlet first falls onto the baffle and then is distributed to the electrolyte distribution plate.

[0021] In one embodiment, the electrolyte distributor further includes a stopper disposed on the electrolyte distribution plate, and the stopper is configured to be adjustable in position on the electrolyte distribution plate to adjust the distribution area of ​​the electrolyte on the electrolyte distribution plate.

[0022] In one embodiment, an electrolyte outlet connecting pipe is provided at the electrolyte outlet, and a plurality of laminar flow tubes are provided at the bottom of the box body. The plurality of laminar flow tubes are connected to the electrolyte outlet connecting pipe, and a plurality of openings are provided on the laminar flow tubes, so that the electrolyte in the box body enters the laminar flow tubes from the openings and then flows out from the electrolyte outlet connecting pipe.

[0023] An embodiment of the present application also provides a liquid flow battery system, including a battery stack, a negative electrode storage tank and a positive electrode storage tank, wherein the negative electrode storage tank and the positive electrode storage tank both adopt the electrolyte storage tank as described above, and the negative electrode storage tank and the positive electrode storage tank are respectively connected to the battery stack to form a circulation loop.

[0024] In the solution provided by the embodiment of the present application, the electrolyte enters the box and is evenly distributed by the electrolyte distributor before falling to the heat exchange tube, thereby realizing convective heat exchange between the electrolyte and the heat exchange tube. This method has a high heat exchange efficiency, and the heat exchange of the electrolyte can be realized through the circulation of the electrolyte itself in the liquid flow battery system, which is conducive to reducing energy consumption and reducing project costs. In addition, the convective heat exchange structure provided by the present application is integrated in the electrolyte storage tank, which can make the structure of the liquid flow battery system compact, save the transportation space of the liquid flow battery system, thereby saving transportation costs, and can reduce the installation space occupied.

[0025] Other features and advantages of the present application will be described in the following description, and partly become apparent from the description, or be understood by implementing the present application. Other advantages of the present application can be realized and obtained by the schemes described in the description and the drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The accompanying drawings are used to provide an understanding of the technical solution of the present application and constitute a part of the specification. Together with the embodiments of the present application, they are used to explain the technical solution of the present application and do not constitute a limitation on the technical solution of the present application.

[0027] Figure 1 is a schematic structural diagram of some components of an electrolyte storage tank in an exploded state according to an embodiment of the present application;

[0028] Figure 2 To display Figure 1 Schematic diagram of the internal structure of the electrolyte storage tank;

[0029] Figure 3 for Figure 2A partial enlarged view of the

[0030] Figure 4 is a schematic structural diagram of a heat exchanger according to an embodiment of the present application;

[0031] Figure 5 for Figure 4 A schematic diagram of a section of the heat exchanger in FIG.

[0032] Figure 6 It is a structural schematic diagram of a medium input component according to one embodiment of the present application;

[0033] Figure 7 for Figure 6 The structure schematic diagram of the medium input assembly shown is viewed from another angle;

[0034] Figure 8 It is a schematic structural diagram of some components of the electrolyte storage tank in another embodiment of the present application in a disassembled state.

[0035] Description of reference numerals:

[0036] 1-box; 11-electrolyte inlet; 12-electrolyte outlet; 13-fixed plate; 14-laminar flow tube; 2-heat exchanger; 21-heat exchange tube; 22-input end plate; 221-mounting hole; 222-sealing ring; 223-second bolt hole; 23-output end plate; 24-medium input assembly; 241-coolant inlet; 242-connecting flange; 243-coolant distribution chamber; 244-coolant uniform distribution plate; 2441-water hole; 2442-first bolt hole; 25-medium output assembly; 26-support plate; 27-connecting pipe; 28-drain outlet; 3-electrolyte uniform distributor; 31-electrolyte uniform distribution plate; 311-card slot; 32-anti-impact baffle; 33-stopper. DETAILED DESCRIPTION

[0037] The present application describes multiple embodiments, but the description is exemplary rather than restrictive, and it is obvious to those skilled in the art that there may be more embodiments and implementations within the scope of the embodiments described in the present application. Although many possible feature combinations are shown in the drawings and discussed in the specific embodiments, many other combinations of the disclosed features are also possible. Unless specifically limited, any feature or element of any embodiment may be used in combination with any other feature or element in any other embodiment, or may replace any other feature or element in any other embodiment.

[0038] The present application includes and contemplates combinations of features and elements known to those of ordinary skill in the art. The embodiments, features and elements disclosed in the present application may also be combined with any conventional features or elements to form a unique invention scheme. Any features or elements of any embodiment may also be combined with features or elements from other invention schemes to form another unique invention scheme. Therefore, it should be understood that any feature shown and / or discussed in the present application may be implemented individually or in any appropriate combination. Therefore, except for the limitations made according to the attached claims and their equivalents, the embodiments are not subject to other restrictions. In addition, various modifications and changes may be made within the scope of protection of the attached claims.

[0039] In addition, when describing representative embodiments, the specification may have presented the method and / or process as a specific sequence of steps. However, to the extent that the method or process does not rely on the specific order of the steps described herein, the method or process should not be limited to the steps of the specific order described. As will be understood by those of ordinary skill in the art, other sequences of steps are also possible. Therefore, the specific sequence of the steps set forth in the specification should not be interpreted as a limitation to the claims. In addition, the claims for the method and / or process should not be limited to the steps of performing them in the order written, and those skilled in the art can easily understand that these sequences can be changed and still remain within the spirit and scope of the embodiments of the present application.

[0040] The embodiment of the present application provides an electrolyte storage tank, such as Figure 1 and Figure 2 In the embodiment shown, the electrolyte storage tank comprises: a tank body 1, a heat exchanger 2 and an electrolyte distributor 3;

[0041] The box body 1 has an electrolyte inlet 11 and an electrolyte outlet 12;

[0042] The heat exchanger 2 includes a heat exchange tube 21 at least partially located in the housing 1, and the heat exchange tube 21 has an input end for inputting a cooling medium and an output end for outputting a cooling medium;

[0043] The electrolyte distributor 3 is arranged in the box 1 and located above the heat exchange tube 21, and a plurality of openings are arranged on the electrolyte distributor 3;

[0044] Among them, the electrolyte distributor 3 is configured to receive the electrolyte input from the electrolyte inlet 11, and the received electrolyte is distributed to multiple openings, and falls from the multiple openings to the heat exchange tube 21 for heat exchange, and then falls from the heat exchange tube 21 to the space at the bottom of the box 1.

[0045] In the solution provided by the embodiment of the present application, the electrolyte enters the box body 1 and is evenly distributed by the electrolyte distributor 3 and then falls to the heat exchange tube 21, thereby realizing convective heat exchange between the electrolyte and the heat exchange tube 21. This method has a high heat exchange efficiency, and the heat exchange of the electrolyte can be realized through the circulation of the electrolyte itself in the liquid flow battery system (that is, the circulation of the electrolyte entering from the electrolyte inlet 11 and flowing out from the electrolyte outlet 12), which is conducive to reducing energy consumption and reducing project costs. In addition, the convective heat exchange structure provided by the present application is integrated in the electrolyte storage tank, which can make the structure of the liquid flow battery system compact, save the transportation space of the liquid flow battery system, thereby saving transportation costs, and can reduce the installation space occupied.

[0046] In one embodiment, Figure 2-Figure 4 As shown, a plurality of heat exchange tubes 21 of the heat exchanger 2 are arranged side by side. The heat exchanger 2 also includes an input end plate 22 and an output end plate 23. A plurality of mounting holes 221 are respectively arranged on the input end plate 22 and the output end plate 23. The input end of the heat exchange tube 21 is connected to the mounting hole 221 of the input end plate 22, and the output end is connected to the mounting hole 221 of the output end plate 23. In this way, the cooling medium can be input to the heat exchange tube 21 through the mounting hole 221 of the input end plate 22, and the cooling medium of the heat exchange tube 21 can be output through the mounting hole 221 of the output end plate 23. The heat exchanger 2 also includes a medium input component 24 connected to the input end plate 22 and a medium output component 25 connected to the output end plate 23. The medium input component 24 is connected to the input end plate 22 to input the cooling medium to the mounting hole 221 of the input end plate 22, and the medium output component 25 is connected to the output end plate 23 to receive and output the cooling medium flowing out of the mounting hole 221 of the output end plate 23.

[0047] It is understandable that the structure of the heat exchange tube 21 is not limited to Figure 2-Figure 4 In the form shown, for example, the heat exchange tube 21 can also be a spirally bent coil, or a bent S-shaped tube, etc.

[0048] In one embodiment, the cooling medium input into the heat exchange tube 21 is a coolant, and the coolant can be cooling water or other types of coolants, and the type of the coolant is not limited.

[0049] Figure 6 and Figure 7A medium input assembly 24 for inputting coolant into the heat exchange tube 21 is shown. The medium input assembly 24 is provided with a coolant distribution chamber 243 and a coolant inlet 241 connected to the coolant distribution chamber 243. A coolant uniform distribution plate 244 is provided between the coolant distribution chamber 243 and the input end plate 22. The coolant uniform distribution plate 244 has a plurality of water holes 2441, so that the coolant in the coolant distribution chamber 243 enters the transition space between the coolant uniform distribution plate 244 and the input end plate 22 through the plurality of water holes 2441, and then the coolant in the transition space can uniformly enter the plurality of mounting holes 221 of the input end plate 22, thereby entering each heat exchange tube 21. By providing the coolant uniform distribution plate 244, the coolant entering the coolant distribution chamber 243 from the coolant inlet 241 can be uniformly distributed to the plurality of heat exchange tubes 21.

[0050] exist Figure 6 and Figure 7 In the example, a surface of the coolant uniform distribution plate 244 on one side facing the input end plate 22 is depressed to form a groove in an area having a plurality of water holes 2441, and the coolant uniform distribution plate 244 is provided with a plurality of first bolt holes 2442 arranged at intervals around the periphery of the groove, and the input end plate 22 is provided with second bolt holes 223 corresponding to the first bolt holes 2442 one by one, and the coolant uniform distribution plate 244 is fixed to the input end plate 22 by bolts. After the coolant uniform distribution plate 244 is fixed to the input end plate 22, the groove forms a transition space between the coolant uniform distribution plate 244 and the input end plate 22, wherein the volume of the transition space can be set so that the water entering from the water holes 2441 of the coolant uniform distribution plate 244 can fill the transition space, so that the water in the transition space can evenly enter the plurality of mounting holes 221 of the input end plate 22. In order to seal the space between the input end plate 22 and the coolant uniform distribution plate 244, a sealing ring 222 surrounding the transition space may be provided between the input end plate 22 and the coolant uniform distribution plate 244. Figure 4 It is shown that a sealing groove surrounding a plurality of mounting holes 221 is provided on one side of the input end plate 22 facing the coolant uniform distribution plate 244 , and a sealing ring 222 is installed in the sealing groove.

[0051] In addition, if Figure 6 It is shown that the coolant distribution chamber 243 is connected to a pipe section with a coolant inlet 241, and the pipe section is provided with a connecting flange 242 at the coolant inlet 241, and the connecting flange 242 can be conveniently connected to the coolant providing device.

[0052] exist Figure 1 and Figure 2In the example shown, the medium output assembly 25 can have the same structure as the medium input assembly 24, so that there is no need to distinguish between the two during installation, which can improve installation efficiency. Of course, in other embodiments, the medium output assembly 25 can also be different from the medium input assembly 24, for example, the medium output assembly 25 can be provided with no coolant distribution plate 244, as long as the cooling medium of the heat exchange tube 21 can flow out to the medium output assembly 25 and out from the medium output assembly 25.

[0053] In one embodiment, the cooling medium input to the heat exchange tube 21 is a cooling airflow, and heat is exchanged between the cooling airflow and the electrolyte. Figure 8 As shown, the medium input component 24 is an input air duct connected to the input end plate 22 , and the medium output component 25 is an output air duct connected to the output end plate 23 .

[0054] Since airflow will produce condensed water during the heat exchange process, Figure 8 In the example shown, the input air duct and the output air duct are respectively provided with drain ports 28 for draining condensed water.

[0055] exist Figure 2 and Figure 8 In the example shown, end plate mounting openings are respectively provided on opposite sides of the box body 1, the input end plate 22 and the output end plate 23 are respectively mounted on the end plate mounting openings on both sides, and the medium input component 24 and the medium output component 25 are respectively mounted on the outside of the box body 1.

[0056] In order to stabilize the heat exchange tube 21 in the housing 1, especially when the heat exchange tube 21 is a flexible tube, the heat exchange tube 21 between the input end plate 22 and the output end plate 23 of the heat exchanger 2 can be supported. Figure 4 In the illustrated embodiment, the heat exchanger 2 further includes at least one support plate 26 located between the input end plate 22 and the output end plate 23, the support plate 26 being arranged to be fixed to the housing 1, and the plurality of heat exchange tubes 21 all pass through the support plate 26. The support plate 26 can move along the length direction of the heat exchange tube 21, so that the support plate 26 can correspond to a fixed portion arranged on the housing 1, and the fixed portion can be provided with a slot, so that the support plate 26 can be inserted into the slot of the housing 1 and fixed.

[0057] In one example, if Figure 5 As shown, the heat exchange tube 21 is a flexible tube, for example, it can be a FEP hose. In order to install the flexible heat exchange tube 21 on the input end plate 22 and the output end plate 23, a hard connecting tube 27 can be inserted into the input end and the output end of the heat exchange tube 21, and the connecting tube 27 is then inserted into the mounting hole 221 for fixation.

[0058] Among them, the connecting tube 27 can be a copper tube or other metal tube, so that the connecting tube 27 can be inserted into the mounting hole 221 by expansion connection. After the connecting tube 27 is inserted into the mounting hole 221, the end of the heat exchange tube 21 is welded to the mounting hole 221 by welding or other sealing methods are used to achieve the sealing between the heat exchange tube 21 and the mounting hole 221.

[0059] In one embodiment, the electrolyte distributor 3 includes an electrolyte distribution plate 31 and a baffle plate 32. The electrolyte distribution plate 31 is installed between the electrolyte inlet 11 and the heat exchange tube 21, and a plurality of openings are provided on the electrolyte distribution plate 31. The baffle plate 32 is provided above the electrolyte distribution plate 31 and corresponds to the electrolyte inlet 11. The electrolyte input from the electrolyte inlet 11 first falls on the baffle plate 32 and then is distributed to the electrolyte distribution plate 31. By providing the baffle plate 32, the electrolyte can be dispersed on the electrolyte distribution plate 31, so as to avoid that most of the electrolyte input from the electrolyte inlet 11 falls directly downward to an area of ​​the electrolyte distribution plate 31 and causes insufficient heat exchange with the heat exchange tube 21.

[0060] like Figure 2 and Figure 3 In the example shown, a fixed plate 13 is provided on the box body 1, and an electrolyte inlet pipe having an electrolyte inlet 11 is fixed on the fixed plate 13. A baffle plate 32 is provided below the fixed plate 13, and the electrolyte inlet 11 corresponds to the baffle plate 32. The electrolyte entering the electrolyte inlet 11 falls on the baffle plate 32 and then disperses to both sides, so that the electrolyte is evenly sprayed downward through the multiple openings on the electrolyte uniform distribution plate 31, thereby fully convecting heat exchange with the heat exchange tubes 21 below.

[0061] In one embodiment, the electrolyte distributor 3 further includes a stopper 33 disposed on the electrolyte distribution plate 31 , and the stopper 33 is configured to be adjustable in position on the electrolyte distribution plate 31 to adjust the distribution area of ​​the electrolyte on the electrolyte distribution plate 31 .

[0062] like Figure 2 and Figure 3 In the example shown, stoppers 33 located on the electrolyte uniform distribution plate 31 are respectively provided on both sides of the baffle plate 32, and the area between the stoppers 33 on both sides is the area where the electrolyte can be distributed. When the flow rate of the electrolyte input through the electrolyte inlet 11 is small, the stopper 33 can be adjusted close to the baffle plate 32 to reduce the area between the stoppers 33 on both sides. When the flow rate of the electrolyte input through the electrolyte inlet 11 is large, the stopper 33 can be adjusted away from the baffle plate 32 to expand the area between the stoppers 33 on both sides. Therefore, the distribution area of ​​the electrolyte on the electrolyte uniform distribution plate 31 can be adjusted by adjusting the position of the stopper 33 on the electrolyte uniform distribution plate 31.

[0063] In order to make the position of the stopper 33 adjustable, a plurality of slots 311 may be provided along the edge of the electrolyte evenly distributing plate 31, and the installation position may be adjusted by locking the stopper 33 in the slots 311 at different positions. Of course, the stopper 33 may also be provided to be movable on a guide rail so that the stopper 33 may change the installation position by sliding.

[0064] In one embodiment, an electrolyte outlet pipe is provided at the electrolyte outlet 12, and a plurality of laminar flow tubes 14 are provided at the bottom of the box body 1. The plurality of laminar flow tubes 14 are respectively connected to the electrolyte outlet pipe, and a plurality of openings are provided on the laminar flow tubes 14, so that the electrolyte in the box body 1 enters the laminar flow tubes 14 from the openings and then flows out from the electrolyte outlet pipe.

[0065] By providing a plurality of laminar flow tubes 14 each having an opening, the electrolyte in the housing 1 first enters the laminar flow tube 14 through the opening, flows from the laminar flow tube 14 into the electrolyte outlet pipe, and then flows out. This structural arrangement can achieve laminar flow of the electrolyte, which can improve the discharge efficiency of the battery.

[0066] An embodiment of the present application also provides a liquid flow battery system, including a battery stack, a negative electrode storage tank and a positive electrode storage tank, wherein the negative electrode storage tank and the positive electrode storage tank both adopt the electrolyte storage tank as described above, and the negative electrode storage tank and the positive electrode storage tank are respectively connected to the battery stack to form a circulation loop.

[0067] The implementation method of connecting the negative electrode liquid storage tank and the positive electrode liquid storage tank to the battery stack to form a circulation loop is a common method used by those skilled in the art and will not be elaborated here.

[0068] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0069] In addition, the terms "first", "second", etc. are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first", "second", etc. may explicitly or implicitly include at least one of the features.

[0070] In the description of the present application, “plurality” means at least two, for example, two, three, etc., unless otherwise clearly and specifically defined.

[0071] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0072] In the present application, unless otherwise clearly specified and limited, a first feature being “above” or “below” a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being “above”, “above”, and “above” a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being “below”, “below”, and “below” a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0073] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example" 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 application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0074] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. An electrolyte storage tank, characterized in that: include: A box body having an electrolyte inlet and an electrolyte outlet; A heat exchanger, comprising a heat exchange tube at least partially located in the box body, the heat exchange tube having an input end for inputting a cooling medium and an output end for outputting the cooling medium; An electrolyte distributor is disposed in the box and above the heat exchange tube, and the electrolyte distributor is provided with a plurality of openings; The electrolyte distributor is configured to receive the electrolyte input from the electrolyte inlet, and the received electrolyte is distributed to a plurality of openings, and falls from the plurality of openings to the heat exchange tube for heat exchange, and then falls from the heat exchange tube to the space at the lower part of the box body; A plurality of heat exchange tubes are arranged side by side, and the heat exchanger further comprises an input end plate and an output end plate, wherein the input end plate and the output end plate are respectively provided with a plurality of mounting holes, the input end of the heat exchange tube is connected to the mounting hole of the input end plate, and the output end is connected to the mounting hole of the output end plate; The heat exchanger further comprises a medium input assembly connected to the input end plate and a medium output assembly connected to the output end plate, wherein the medium input assembly is connected to the input end plate to input cooling medium into the mounting hole of the input end plate, and the medium output assembly is connected to the output end plate to receive and output cooling medium flowing out of the mounting hole of the output end plate; The cooling medium is a cooling liquid; The medium input assembly is provided with a coolant distribution chamber and a coolant inlet communicated with the coolant distribution chamber, a coolant uniform distribution plate is provided between the coolant distribution chamber and the input end plate, and the coolant uniform distribution plate has a plurality of water holes, so that the coolant in the coolant distribution chamber enters the transition space between the coolant uniform distribution plate and the input end plate through the plurality of water holes; End plate mounting openings are respectively arranged on opposite sides of the box body, the input end plate and the output end plate are respectively mounted on the end plate mounting openings on both sides, and the medium input assembly and the medium output assembly are respectively mounted on the outside of the box body.

2. The electrolyte storage tank according to claim 1, characterized in that: The heat exchanger further comprises at least one supporting plate located between the input end plate and the output end plate, wherein the supporting plate is arranged to be mounted on the box body, and the plurality of heat exchange tubes all pass through the supporting plate.

3. The electrolyte storage tank according to claim 1, characterized in that: The heat exchange tube is a flexible tube, and hard connecting tubes are respectively inserted into the input end and the output end of the heat exchange tube, and the connecting tubes are inserted into the mounting holes and fixed.

4. The electrolyte storage tank according to any one of claims 1 to 3, characterized in that: The electrolyte distributor includes an electrolyte distribution plate and a baffle. The electrolyte distribution plate is installed between the electrolyte inlet and the heat exchange tube, and a plurality of openings are arranged on the electrolyte distribution plate. The baffle is arranged above the electrolyte distribution plate and corresponds to the electrolyte inlet. The electrolyte input from the electrolyte inlet first falls onto the baffle and then is distributed to the electrolyte distribution plate.

5. The electrolyte storage tank according to claim 4, characterized in that: The electrolyte distributor further comprises a stopper arranged on the electrolyte distribution plate, wherein the stopper is arranged to be adjustable in position on the electrolyte distribution plate so as to adjust the distribution area of ​​the electrolyte on the electrolyte distribution plate.

6. The electrolyte storage tank according to any one of claims 1 to 3, characterized in that: An electrolyte outlet connecting pipe is provided at the electrolyte outlet, and a plurality of laminar flow tubes are provided at the bottom of the box body. The plurality of laminar flow tubes are connected to the electrolyte outlet connecting pipe, and a plurality of openings are provided on the laminar flow tubes, so that the electrolyte in the box body enters the laminar flow tubes from the openings and then flows out from the electrolyte outlet connecting pipe.

7. A liquid flow battery system, characterized in that: It comprises a battery stack, a negative electrode storage tank and a positive electrode storage tank, wherein the negative electrode storage tank and the positive electrode storage tank both adopt the electrolyte storage tank according to any one of claims 1-6, and the negative electrode storage tank and the positive electrode storage tank are respectively connected to the battery stack to form a circulation loop.

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