Liquid flow battery plate type heat exchanger

Abstract

The invention discloses a liquid flow battery plate type heat exchanger which comprises a front end plate, a heat exchange body, a sealing end plate and a rear end plate which are sequentially stacked in the first direction. The first hot fluid inlet, the first hot fluid outlet, the first cold fluid inlet and the first cold fluid outlet are selectively formed in the front end plate and / or the rear end plate; the heat exchange body comprises at least one set of heat flow field plates and cold flow field plates which are stacked in the first direction. The liquid flow battery plate type heat exchanger has the following advantages that the heat flow field plate, the cold flow field plate and the sealing end plate which are stacked in the first direction are compact in structure, and a flow channel inlet and a flow channel outlet of hot fluid and a flow channel inlet and a flow channel outlet of cold fluid are formed in the plate bodies correspondingly; efficient heat exchange between hot fluid and cold fluid can be achieved through the hot flow field plate and the cold flow field plate which are arranged in a stacked mode. The sealing structures are arranged on the hot flow field plate, the cold flow field plate and the sealing end plates respectively, interpenetration or outward leakage between hot fluid and cold fluid can be avoided, and the heat exchange reliability is relatively good.

Description

Technical Field

[0001] The invention relates to the technical field of liquid flow batteries, and in particular to a plate heat exchanger for a liquid flow battery. Background Art

[0002] Liquid flow battery, also known as redox flow battery, is a new type of electrochemical energy storage battery. Liquid flow battery consists of battery stack unit, electrolyte, electrolyte storage and supply unit, and management control unit. During the energy storage process, only the valence state of the active material ions changes. The ions participating in the reaction on both sides of the positive and negative electrodes can be ions of different elements or ions of the same element but with different valence states. In recent decades, liquid flow battery technology has developed rapidly. The main liquid flow battery systems include: battery system composed of sodium sulfide and bromine, battery system composed of all-vanadium materials, battery system composed of iron and chromium, etc. Liquid flow batteries are widely used in many fields such as renewable energy storage, power grid peak regulation, remote areas and emergency power supply, electric vehicles, backup power supplies, etc.

[0003] The operation of flow batteries generates heat. If the heat cannot be dissipated in time and effectively, the battery temperature will rise, thus affecting the battery performance and safety. The operating temperature of flow batteries is closely related to electrochemical reactions, ionic conductivity, ion transmembrane transport rate, and electrolyte viscosity. Increasing the temperature can increase the reaction rate and promote the reaction kinetics in electrochemical reactions. At the same time, high temperature will also reduce the viscosity of the electrolyte, thereby improving the transmission efficiency of ions from the main body to the electrode surface and reducing the concentration polarization potential. However, when the temperature exceeds a certain range, it will have a greater adverse effect on the battery, such as: accelerating side reactions, resulting in a decrease in Coulomb efficiency; enhancing the diffusion capacity of ions through the diaphragm, aggravating capacity decay; causing the precipitation of reactants in the electrolyte, causing blockage of the flow channel, covering the electrodes and diaphragms, increasing the power consumption of the delivery pump, and causing battery failure. In addition, continued high temperatures will also accelerate the aging of materials such as electrodes and diaphragms inside the battery, thereby shortening the service life of the battery. Therefore, thermal management of flow batteries is of great significance to maintaining their stable operation.

[0004] Existing devices for cooling liquid flow batteries have relatively low heat exchange efficiency and relatively poor heat exchange effect. Summary of the invention

[0005] The object of the present invention is to provide a plate heat exchanger for a flow battery, which has a compact structure, relatively high heat exchange efficiency and heat exchange effect, and relatively good heat exchange reliability.

[0006] In order to achieve the above object, the technical solution adopted by the present invention is:

[0007] A flow battery plate heat exchanger comprises a front end plate, a heat exchange body, a sealing end plate and a rear end plate which are sequentially stacked along a first direction;

[0008] The flow battery plate heat exchanger further comprises a first hot fluid inlet, a first hot fluid outlet, a first cold fluid inlet and a first cold fluid outlet, the foregoing four of which may be selectively provided on the front plate and / or the rear plate;

[0009] The heat exchange body comprises at least one set of hot flow field plates and cold flow field plates stacked along the first direction, wherein:

[0010] The heat flow field plate comprises a heat plate body, a heat flow field area for guiding the flow of a heat fluid and a heat sealing structure for enclosing the heat flow field area, a second heat fluid inlet, a second heat fluid outlet, a second cold fluid inlet and a second cold fluid outlet provided on the heat plate body, the second heat fluid inlet and the second heat fluid outlet are located in the heat sealing structure, the second cold fluid inlet and the second cold fluid outlet are located outside the heat sealing structure, and the heat sealing structure is circumferentially abutted against the front end plate or the rear side of the cold flow field plate;

[0011] The cold flow field plate comprises a cold plate body, a cold flow field area for guiding the flow of cold fluid and a cold sealing structure for enclosing the cold flow field area, a third hot fluid inlet, a third hot fluid outlet, a third cold fluid inlet and a third cold fluid outlet provided on the cold plate body, the third cold fluid inlet and the third cold fluid outlet are located in the cold sealing mechanism, the third hot fluid inlet and the third hot fluid outlet are located outside the cold sealing structure, and the cold sealing structure is circumferentially abutted against the rear side of the hot plate body;

[0012] The sealing end plate comprises an end plate body, an end flow field area for guiding the flow of a hot fluid and an end sealing structure for enclosing the end flow field area, a fourth hot fluid inlet, a fourth hot fluid outlet, a fourth cold fluid inlet and a fourth cold fluid outlet provided on the end plate body, and four groups of first sealing rings provided on the rear side of the end plate body for respectively enclosing the fourth hot fluid inlet, the fourth hot fluid outlet, the fourth cold fluid inlet and the fourth cold fluid outlet, the fourth hot fluid inlet and the fourth hot fluid outlet are located in the end sealing structure, the fourth cold fluid inlet and the fourth cold fluid outlet are located outside the end sealing structure, the end sealing structure is circumferentially abutted against the rear side of the cold plate body, and the four groups of first sealing rings are respectively abutted against the front side of the rear end plate;

[0013] The first hot fluid inlet, the second hot fluid inlet, the third hot fluid inlet and the fourth hot fluid inlet are aligned along the first direction; the first hot fluid outlet, the second hot fluid outlet, the third hot fluid outlet and the fourth hot fluid outlet are aligned along the first direction; the first cold fluid inlet, the second cold fluid inlet, the third cold fluid inlet and the fourth cold fluid inlet are aligned along the first direction; the first cold fluid outlet, the second cold fluid outlet, the third cold fluid outlet and the fourth cold fluid outlet are aligned along the first direction.

[0014] Preferably, the heat flow field area includes a hot liquid inlet diversion partition, a hot liquid inlet distribution partition, a hot fluid mainstream partition, a hot liquid outlet distribution partition and a hot liquid outlet diversion partition which are connected in sequence along the flow direction of the hot fluid, the hot liquid inlet diversion partition is connected to the second hot fluid inlet, and the hot liquid outlet diversion partition is connected to the second hot fluid outlet.

[0015] More preferably, the hot liquid inlet diversion partition, the hot fluid mainstream partition and the hot liquid outlet diversion partition are respectively groove structures, and the arrangement direction of each groove in the groove structure is perpendicular to the flow direction of the hot fluid; the hot liquid inlet distribution partition and the hot liquid outlet distribution partition are respectively convex point structures, and the arrangement direction of each convex point in the convex point structure is perpendicular to the flow direction of the hot fluid.

[0016] Preferably, the cold flow field area includes a cold liquid inlet diversion partition, a cold liquid inlet distribution partition, a cold fluid mainstream partition, a cold liquid outlet distribution partition and a cold liquid outlet diversion partition which are connected in sequence along the flow direction of the cold fluid, the cold liquid inlet diversion partition is connected to the third cold fluid inlet, and the cold outlet liquid diversion partition is connected to the third cold fluid outlet.

[0017] More preferably, the cold liquid inlet diversion partition, the cold fluid mainstream partition and the cold liquid outlet diversion partition are respectively groove structures, and the arrangement direction of each groove in the groove structure is perpendicular to the flow direction of the cold fluid; the cold liquid inlet distribution partition and the cold liquid outlet distribution partition are respectively convex point structures, and the arrangement direction of each convex point in the convex point structure is perpendicular to the flow direction of the cold fluid.

[0018] Preferably, the end flow field area includes a hot liquid inlet guide end partition, a hot liquid inlet distribution end partition, a hot fluid mainstream end partition, a hot liquid outlet distribution end partition and a hot liquid outlet guide end partition which are sequentially connected along the flow direction of the hot fluid, the hot liquid inlet guide end partition is connected to the fourth hot fluid inlet, and the hot liquid outlet guide end partition is connected to the fourth hot fluid outlet.

[0019] More preferably, the hot liquid inlet guide end partition, the hot fluid mainstream end partition and the hot liquid outlet guide end partition are respectively groove structures, and the arrangement direction of each groove in the groove structure is perpendicular to the flow direction of the hot fluid; the hot liquid inlet distribution end partition and the hot liquid outlet distribution end partition are respectively convex point structures, and the arrangement direction of each convex point in the convex point structure is perpendicular to the flow direction of the hot fluid.

[0020] Preferably, the front end plate, the rear end plate, the hot flow field plate, the cold flow field plate and the sealing end plate are respectively provided with front positioning holes, rear positioning holes, hot positioning holes, cold positioning holes and end positioning holes aligned along the first direction, and the liquid flow battery plate heat exchanger also includes positioning parts passing through the front positioning holes, rear positioning holes, hot positioning holes, cold positioning holes and end positioning holes.

[0021] Preferably, the front end plate and the rear end plate are respectively provided with a front mounting hole and a rear mounting hole aligned along the first direction, and the liquid flow battery plate heat exchanger also includes a mounting member penetrating the front mounting hole and the rear mounting hole, and the mounting member is located on the outside of the heat exchange body and the sealing end plate.

[0022] Preferably, the liquid flow battery plate heat exchanger further comprises a filling material filled in the heat sealing structure, the cold sealing structure, the end sealing structure and the first sealing ring.

[0023] Due to the application of the above technical solution, the present invention has the following advantages compared with the prior art: The plate heat exchanger of the flow battery of the present invention has the following advantages:

[0024] The hot flow field plates, cold flow field plates and sealing end plates stacked in the first direction have a compact structure, and the flow channel inlet and outlet of the hot fluid and the flow channel inlet and outlet of the cold fluid are respectively opened on each plate body. The stacked hot flow field plates and cold flow field plates can realize efficient heat exchange between the hot fluid and the cold fluid;

[0025] Sealing structures are respectively arranged on the hot flow field plate, the cold flow field plate and the sealing end plate, which can prevent the hot fluid and the cold fluid from interpenetrating or leaking outward. The reliability of heat exchange is relatively good, effectively ensuring the service life of the liquid flow battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Attached Figure 1 This is a schematic diagram of the explosion structure of the plate heat exchanger for the flow battery in Example 1;

[0027] Attached Figure 2 This is a schematic diagram of the assembly structure of the plate heat exchanger for the flow battery in Example 1;

[0028] Attached Figure 3 It is a structural schematic diagram of the front end board in the first embodiment;

[0029] Attached Figure 4 This is a schematic diagram of the structure of the rear end plate in the first embodiment;

[0030] Attached Figure 5 is a schematic structural diagram of the heat flow field plate in Example 1;

[0031] Attached Figure 6 It is a schematic diagram of the structure of the cold flow field plate in Example 1;

[0032] Attached Figure 7 is a schematic structural diagram of the flow field end plate in Example 1;

[0033] Attached Figure 8 This is a schematic diagram of the structure of the front end board in the second embodiment;

[0034] Attached Fig. 9 This is a schematic diagram of the structure of the rear end plate in the second embodiment;

[0035] Attached Fig.10 This is a schematic diagram of the structure of the front end board in the third embodiment;

[0036] Attached Fig.11 This is a schematic diagram of the structure of the rear end plate in the third embodiment.

[0037] Among them: 1. front end plate; 11. front positioning hole; 12. front mounting hole;

[0038] 2. Heat exchanger body;

[0039] 21. heat flow field plate; 211. heat plate body; 212. heat flow field area; 2121. hot inlet liquid diversion partition; 2122. hot inlet liquid distribution partition; 2123. hot fluid mainstream partition; 2124. hot outlet liquid distribution partition; 2125. hot outlet liquid diversion partition; 213. heat sealing structure; 214. second hot fluid inlet; 215. second hot fluid outlet; 216. second cold fluid inlet; 217. second cold fluid outlet; 218. heat positioning hole; 219. second sealing ring;

[0040] 22. Cold flow field plate; 221. Cold plate body; 222. Cold flow field area; 2221. Cold inlet diversion partition; 2222. Cold inlet distribution partition; 2223. Cold fluid mainstream partition; 2224. Cold outlet distribution partition; 2225. Cold outlet diversion partition; 223. Cold sealing structure; 224. Third hot fluid inlet; 225. Third hot fluid outlet; 226. Third cold fluid inlet; 227. Third cold fluid outlet; 228. Cold positioning hole; 229. Third sealing ring;

[0041] 3. Sealing end plate; 31. End plate body; 32. End flow field area; 321. Hot inlet guide end partition; 322. Hot inlet distribution end partition; 323. Hot fluid main flow end partition; 324. Hot outlet distribution end partition; 325. Hot outlet guide end partition; 33. End sealing structure; 34. Fourth hot fluid inlet; 35. Fourth hot fluid outlet; 36. Fourth cold fluid inlet; 37. Fourth cold fluid outlet; 38. First sealing ring; 39. End positioning hole; 310. Fourth sealing ring;

[0042] 4. Rear end plate; 41. Rear positioning hole; 42. Rear mounting hole;

[0043] 5. First hot fluid inlet; 6. First hot fluid outlet; 7. First cold fluid inlet; 8. First cold fluid outlet;

[0044] 9. Mounting parts. DETAILED DESCRIPTION

[0045] The technical solution of the present invention is further described below in conjunction with specific embodiments and drawings.

[0046] In the following, only some exemplary embodiments are briefly described. As those skilled in the art will appreciate, the described embodiments may be modified in various ways without departing from the spirit or scope of the embodiments of the present invention. Therefore, the drawings and descriptions are considered to be exemplary and non-restrictive in nature.

[0047] In the description of the embodiments of the present invention, it should be understood that the terms "length", "inside", etc. 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 embodiments of the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the embodiments of the present invention.

[0048] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the embodiments of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0049] In the embodiments of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or a communication; it can be a direct connection, or an indirect connection through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present invention can be understood according to specific circumstances.

[0050] In the embodiments of the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes the first feature being directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0051] The disclosure below provides many different embodiments or examples to implement different structures of the embodiments of the present invention. In order to simplify the disclosure of the embodiments of the present invention, the parts and settings of specific examples are described below. Of course, they are only examples, and the purpose is not to limit the embodiments of the present invention. In addition, the embodiments of the present invention can repeat reference numbers and / or reference letters in different examples, and this repetition is for the purpose of simplification and clarity, which itself does not indicate the relationship between the various embodiments and / or settings discussed.

[0052] See also Figure 1-2 As shown, embodiment 1 provides a liquid flow battery plate heat exchanger, comprising a front end plate 1, a heat exchange body 2, a sealing end plate 3 and a rear end plate 4 stacked in sequence along a first direction. The liquid flow battery plate heat exchanger also includes a first hot fluid inlet 5, a first hot fluid outlet 6, a first cold fluid inlet 7 and a first cold fluid outlet 8, and the foregoing four can be selectively opened on the front end plate 1 and / or the rear end plate 4. These four can be opened on the front end plate 1 and / or the rear end plate 4 in any combination of zero-four, one-three, and two-two, with a total of sixteen arrangements.

[0053] In this embodiment, see Figure 3-4 As shown, the first hot fluid inlet 5 and the first cold fluid inlet 7 are opened on the front end plate 1 , and the first hot fluid outlet 6 and the first cold fluid outlet 8 are opened on the rear end plate 4 .

[0054] The heat exchange body 2 comprises at least one set of hot flow field plates 21 and cold flow field plates 22 stacked along a first direction. In this embodiment, multiple sets of hot flow field plates 21 and cold flow field plates 22 are stacked along the first direction and are arranged alternately.

[0055] See also Figure 5 As shown, the heat flow field plate 21 includes a heat plate body 211, a heat flow field area 212 for guiding the flow of a hot fluid, which is arranged on the front side of the heat plate body 211, and a heat sealing structure 213 for enclosing the heat flow field area 212, a second hot fluid inlet 214, a second hot fluid outlet 215, a second cold fluid inlet 216, and a second cold fluid outlet 217, which are arranged on the heat plate body 211. The second hot fluid inlet 214 and the second hot fluid outlet 215 are located in the heat sealing structure 213, and the second cold fluid inlet 216 and the second cold fluid outlet 217 are located outside the heat sealing structure 213, and the heat sealing structure 213 is circumferentially abutted against the rear side of the front end plate 1 or the cold flow field plate 22.

[0056] With this setup:

[0057] First, the heat flow field plate 21 only allows the thermal fluid flowing through to flow into the heat flow field region 212 through the second thermal fluid inlet 214, and then the thermal fluid flows out of the heat flow field region 212 through the second thermal fluid outlet 215;

[0058] Secondly, the heat flow field plate 21 can isolate the cold fluid and prevent it from flowing into the heat flow field area 212 .

[0059] In this embodiment, see Figure 5 As shown, the heat plate body 211 is rectangular, the second hot fluid inlet 214 is located at the lower right of the heat plate body 211, the second hot fluid outlet 215 is located at the upper left of the heat plate body 211, the second cold fluid inlet 216 is located at the lower left of the heat plate body 211, and the second cold fluid outlet 217 is located at the upper right of the heat plate body 211.

[0060] The heat sealing structure 213 is disposed outside the hot flow field area 212, the second hot fluid inlet 214 and the second hot fluid outlet 215. When there is only one set of hot flow field plates 21 and cold flow field plates 22, the heat sealing structure 213 is circumferentially abutted against the rear side of the front end plate 1; when there are several sets of hot flow field plates 21 and cold flow field plates 22, the frontmost heat sealing structure 213 is circumferentially abutted against the rear side of the front end plate 1, and the remaining heat sealing structures 213 are circumferentially abutted against the rear side of the cold flow field plates 22 in front of them.

[0061] See also Figure 5 As shown, the thermal flow field region 212 includes a thermal fluid flow direction ( Figure 5The hot inlet diversion partition 2121, the hot inlet distribution partition 2122, the hot fluid mainstream partition 2123, the hot outlet distribution partition 2124 and the hot outlet diversion partition 2125 are connected in sequence (from right to left in the middle), the hot inlet diversion partition 2121 is connected to the second hot fluid inlet 214, and the hot outlet diversion partition 2125 is connected to the second hot fluid outlet 215.

[0062] In this embodiment, the hot inlet diversion partition 2121, the hot fluid mainstream partition 2123 and the hot outlet diversion partition 2125 are groove structures, and the arrangement direction of each groove in the groove structure is perpendicular to the flow direction of the hot fluid; the hot inlet distribution partition 2122 and the hot outlet distribution partition 2124 are convex point structures, and the arrangement direction of each convex point in the convex point structure is perpendicular to the flow direction of the hot fluid. The groove structure and the convex point structure are respectively used to make the hot fluid distribution tend to be uniform, so as to maximize the heat exchange area and thus ensure the heat exchange efficiency.

[0063] See also Figure 6 As shown, the cold flow field plate 22 includes a cold plate body 221, a cold flow field area 222 provided on the front side of the cold plate body 221 for guiding the flow of cold fluid, a cold sealing structure 223 for enclosing the cold flow field area 222, a third hot fluid inlet 224, a third hot fluid outlet 225, a third cold fluid inlet 226 and a third cold fluid outlet 227 provided on the cold plate body 221. The third cold fluid inlet 226 and the third cold fluid outlet 227 are located in the cold sealing mechanism, the third hot fluid inlet 224 and the third hot fluid outlet 225 are located outside the cold sealing structure 223, and the cold sealing structure 223 is circumferentially abutted against the rear side of the hot plate body 211.

[0064] With this setup:

[0065] First, the cold flow field plate 22 only allows the cold fluid flowing through to flow into the cold flow field area 222 through the third cold fluid inlet 226, and then the cold fluid flows out of the cold flow field area 222 through the third cold fluid outlet 227;

[0066] Secondly, the cold flow field plate 22 can isolate the hot fluid and prevent it from flowing into the cold flow field area 222 .

[0067] In this embodiment, see Figure 6 As shown, the cold plate body 221 is rectangular, the third hot fluid inlet 224 is located at the lower right of the cold plate body 221, the third hot fluid outlet 225 is located at the upper left of the cold plate body 221, the third cold fluid inlet 226 is located at the lower left of the cold plate body 221, and the third cold fluid outlet 227 is located at the upper right of the cold plate body 221.

[0068] The cold sealing structure 223 is arranged around the outside of the cold flow field area 222 , the third cold fluid inlet 226 and the third cold fluid outlet 227 .

[0069] See also Figure 6 As shown, the cold flow field region 222 includes the cold fluid flow direction ( Figure 6 The cold liquid diversion partition 2221, the cold liquid distribution partition 2222, the cold fluid mainstream partition 2223, the cold liquid distribution partition 2224 and the cold outlet liquid diversion partition 2225 are connected in sequence (from left to right in the figure), the cold liquid diversion partition 2221 is connected to the third cold fluid inlet 226, and the cold outlet liquid diversion partition 2225 is connected to the third cold fluid outlet 227.

[0070] In this embodiment, the cold inlet flow guide partition 2221, the cold fluid mainstream partition 2223 and the cold outlet flow guide partition 2225 are groove structures, and the arrangement direction of each groove in the groove structure is perpendicular to the flow direction of the cold fluid; the cold inlet flow distribution partition 2222 and the cold outlet flow distribution partition 2224 are convex point structures, and the arrangement direction of each convex point in the convex point structure is perpendicular to the flow direction of the cold fluid. The groove structure and the convex point structure are respectively used to make the cold fluid distribution tend to be uniform, so as to maximize the heat exchange area and thus ensure the heat exchange efficiency.

[0071] See also Figure 7 As shown, the sealing end plate 3 includes an end plate body 31, an end flow field area 32 for guiding the flow of hot fluid and an end sealing structure 33 for enclosing the end flow field area 32, a fourth hot fluid inlet 34, a fourth hot fluid outlet 35, a fourth cold fluid inlet 36 and a fourth cold fluid outlet 37 provided on the end plate body 31, and four groups of first sealing rings 38 for respectively enclosing the fourth hot fluid inlet 34, the fourth hot fluid outlet 35, the fourth cold fluid inlet 36 and the fourth cold fluid outlet 37 on the rear side of the end plate body 31. The fourth hot fluid inlet 34 and the fourth hot fluid outlet 35 are located in the end sealing structure 33, the fourth cold fluid inlet 36 and the fourth cold fluid outlet 37 are located outside the end sealing structure 33, and the end sealing structure 33 is circumferentially abutted against the rear side of the cold plate body 221. The four groups of the first sealing rings 38 are respectively abutted against the front side of the rear end plate 4.

[0072] With this setup:

[0073] First, the sealed end plate 3 only allows the thermal fluid flowing through to flow into the end flow field area 32 through the fourth thermal fluid inlet 34, and then the thermal fluid flows out of the end flow field area 32 through the fourth thermal fluid outlet 35;

[0074] Secondly, the sealing end plate 3 can isolate the cold fluid and prevent it from flowing into the end flow field area 32;

[0075] Finally, the sealing end plate 3 can also prevent the hot fluid and the cold fluid from interpenetrating or leaking outward from the rear side thereof.

[0076] In this embodiment, see Figure 7 As shown, the end plate body 31 is rectangular, the fourth hot fluid inlet 34 is located at the lower right of the end plate body 31, the fourth hot fluid outlet 35 is located at the upper left of the end plate body 31, the fourth cold fluid inlet 36 is located at the lower left of the end plate body 31, and the fourth cold fluid outlet 37 is located at the upper right of the end plate body 31.

[0077] The end sealing structure 33 is arranged around the outer sides of the end flow field area 32 , the fourth hot fluid inlet 34 and the fourth hot fluid outlet 35 .

[0078] See also Figure 7 As shown, the end flow field area 32 includes a flow direction of the hot fluid ( Figure 7 The hot liquid inlet guide end partition 321, the hot liquid inlet distribution end partition 322, the hot fluid mainstream end partition 323, the hot liquid outlet distribution end partition 324 and the hot liquid outlet guide end partition 325 are connected in sequence (from right to left in the figure), the hot liquid inlet guide end partition 321 is connected to the fourth hot fluid inlet 34, and the hot liquid outlet guide end partition 325 is connected to the fourth hot fluid outlet 35.

[0079] In this embodiment, the hot liquid inlet guide end partition 321, the hot fluid main flow end partition 323 and the hot liquid outlet guide end partition 325 are groove structures, and the arrangement direction of each groove in the groove structure is perpendicular to the flow direction of the hot fluid; the hot liquid inlet distribution end partition 322 and the hot liquid outlet distribution end partition 324 are convex point structures, and the arrangement direction of each convex point in the convex point structure is perpendicular to the flow direction of the hot fluid. The groove structure and the convex point structure are respectively used to make the hot fluid distribution tend to be uniform, so as to maximize the heat exchange area and thus ensure the heat exchange efficiency.

[0080] See also Figure 1-2 As shown, the first hot fluid inlet 5, the second hot fluid inlet 214, the third hot fluid inlet 224 and the fourth hot fluid inlet 34 are aligned along the first direction; the first hot fluid outlet 6, the second hot fluid outlet 215, the third hot fluid outlet 225 and the fourth hot fluid outlet 35 are aligned along the first direction; the first cold fluid inlet 7, the second cold fluid inlet 216, the third cold fluid inlet 226 and the fourth cold fluid inlet 36 are aligned along the first direction; the first cold fluid outlet 8, the second cold fluid outlet 217, the third cold fluid outlet 227 and the fourth cold fluid outlet 37 are aligned along the first direction. This structure can ensure that the hot fluid and the cold fluid flow uniformly in each hot flow field plate 21 and the cold flow field plate 22 as much as possible.

[0081] In order to prevent leakage of the second cold fluid inlet 216, the second cold fluid outlet 217, the third hot fluid inlet 224, the third hot fluid outlet 225, the fourth cold fluid inlet 36 and the fourth cold fluid outlet 37, second sealing rings 219 are respectively provided on the front side of the hot plate body 211 for correspondingly enclosing the second cold fluid inlet 216 and the second cold fluid outlet 217, and the second sealing ring 219 abuts against the rear side of the front end plate 1 or the cold plate body 221; third sealing rings 229 are respectively provided on the front side of the cold plate body 221 for correspondingly enclosing the third hot fluid inlet 224 and the third hot fluid outlet 225, and the third sealing ring 229 abuts against the rear side of the hot plate body 211; fourth sealing rings 310 are respectively provided on the front side of the end plate body 31 for correspondingly enclosing the fourth cold fluid inlet 36 and the fourth cold fluid outlet 37, and the fourth sealing ring 310 abuts against the rear side of the cold plate body 221.

[0082] See also Figure 1 As shown, the front plate 1, the rear plate 4, the hot flow field plate 21, the cold flow field plate 22 and the sealed end plate 3 are respectively provided with a front positioning hole 11, a rear positioning hole 41, a hot positioning hole 218, a cold positioning hole 228 and an end positioning hole 39 aligned along the first direction, and the liquid flow battery plate heat exchanger also includes a positioning member (not shown in the figure) penetrating the front positioning hole 11, the rear positioning hole 41, the hot positioning hole 218, the cold positioning hole 228 and the end positioning hole 39. The positioning member can ensure that the front plate 1, the rear plate 4, the hot flow field plate 21, the cold flow field plate 22 and the sealed end plate 3 are aligned along the first direction, thereby ensuring that each fluid inlet and outlet are aligned in sequence along the first direction.

[0083] See also Figure 1 As shown, the front plate 1 and the rear plate 4 are respectively provided with a front mounting hole 12 and a rear mounting hole 42 aligned along a first direction. The liquid flow battery plate heat exchanger also includes a mounting member 9 penetrating the front mounting hole 12 and the rear mounting hole 42. The mounting member 9 is located on the outside of the heat exchange body 2 and the sealing end plate 3 to avoid interference.

[0084] In this embodiment, the heat sealing structure 213, the cold sealing structure 223, the end sealing structure 33, the first sealing ring 38, the second sealing ring 219, the third sealing ring 229 and the fourth sealing ring 310 are respectively annular grooves, and the liquid flow battery plate heat exchanger also includes a filling material filled in the annular groove, which is used to prevent the hot fluid and the cold fluid from interpenetrating and leaking outward.

[0085] See also Figure 8-9 As shown, in the second embodiment, the first hot fluid inlet 5 and the first hot fluid outlet 6 are provided on the front end plate 1 , and the first cold fluid inlet 7 and the first cold fluid outlet 8 are provided on the rear end plate 4 .

[0086] See also Figure 10-11 As shown, in the third embodiment, the first hot fluid inlet 5 , the first hot fluid outlet 6 , the first cold fluid inlet 7 and the first cold fluid outlet 8 are all provided on the front end plate 1 , and no fluid inlet or outlet is provided on the rear end plate 4 .

[0087] The above embodiments are only for illustrating the technical concept and features of the present invention, and their purpose is to enable people familiar with this technology to understand the content of the present invention and implement it. They cannot be used to limit the protection scope of the present invention. Any equivalent changes or modifications made according to the spirit of the present invention should be included in the protection scope of the present invention.

Claims

1. A flow battery plate heat exchanger, characterized in that: It includes a front end plate, a heat exchange body, a sealing end plate and a rear end plate which are sequentially stacked along a first direction; The flow battery plate heat exchanger further comprises a first hot fluid inlet, a first hot fluid outlet, a first cold fluid inlet and a first cold fluid outlet, the four of which may be selectively provided on the front plate and / or the rear plate; The heat exchange body comprises at least one set of hot flow field plates and cold flow field plates stacked along the first direction, wherein: The heat flow field plate comprises a heat plate body, a heat flow field area for guiding the flow of a heat fluid and a heat sealing structure for enclosing the heat flow field area, a second heat fluid inlet, a second heat fluid outlet, a second cold fluid inlet and a second cold fluid outlet provided on the heat plate body, the second heat fluid inlet and the second heat fluid outlet are located in the heat sealing structure, the second cold fluid inlet and the second cold fluid outlet are located outside the heat sealing structure, and the heat sealing structure is circumferentially abutted against the front end plate or the rear side of the cold flow field plate; The cold flow field plate comprises a cold plate body, a cold flow field area for guiding the flow of cold fluid and a cold sealing structure for enclosing the cold flow field area, a third hot fluid inlet, a third hot fluid outlet, a third cold fluid inlet and a third cold fluid outlet provided on the cold plate body, the third cold fluid inlet and the third cold fluid outlet are located in the cold sealing mechanism, the third hot fluid inlet and the third hot fluid outlet are located outside the cold sealing structure, and the cold sealing structure is circumferentially abutted against the rear side of the hot plate body; The sealing end plate comprises an end plate body, an end flow field area for guiding the flow of a hot fluid and an end sealing structure for enclosing the end flow field area, a fourth hot fluid inlet, a fourth hot fluid outlet, a fourth cold fluid inlet and a fourth cold fluid outlet provided on the end plate body, and four groups of first sealing rings provided on the rear side of the end plate body for respectively enclosing the fourth hot fluid inlet, the fourth hot fluid outlet, the fourth cold fluid inlet and the fourth cold fluid outlet, the fourth hot fluid inlet and the fourth hot fluid outlet are located in the end sealing structure, the fourth cold fluid inlet and the fourth cold fluid outlet are located outside the end sealing structure, the end sealing structure is circumferentially abutted against the rear side of the cold plate body, and the four groups of first sealing rings are respectively abutted against the front side of the rear end plate; The first hot fluid inlet, the second hot fluid inlet, the third hot fluid inlet and the fourth hot fluid inlet are aligned along the first direction; the first hot fluid outlet, the second hot fluid outlet, the third hot fluid outlet and the fourth hot fluid outlet are aligned along the first direction; the first cold fluid inlet, the second cold fluid inlet, the third cold fluid inlet and the fourth cold fluid inlet are aligned along the first direction; the first cold fluid outlet, the second cold fluid outlet, the third cold fluid outlet and the fourth cold fluid outlet are aligned along the first direction.

2. The plate heat exchanger for flow batteries according to claim 1, characterized in that: The heat flow field area includes a hot liquid inlet diversion partition, a hot liquid inlet distribution partition, a hot fluid mainstream partition, a hot liquid outlet distribution partition and a hot liquid outlet diversion partition which are sequentially connected along the flow direction of the hot fluid, the hot liquid inlet diversion partition is connected to the second hot fluid inlet, and the hot liquid outlet diversion partition is connected to the second hot fluid outlet.

3. The plate heat exchanger for flow batteries according to claim 2, characterized in that: The hot liquid inlet diversion partition, the hot fluid mainstream partition and the hot liquid outlet diversion partition are respectively groove structures, and the arrangement direction of each groove in the groove structure is perpendicular to the flow direction of the hot fluid; the hot liquid inlet distribution partition and the hot liquid outlet distribution partition are respectively convex point structures, and the arrangement direction of each convex point in the convex point structure is perpendicular to the flow direction of the hot fluid.

4. The plate heat exchanger for flow batteries according to claim 1, characterized in that: The cold flow field area includes a cold inlet diversion partition, a cold inlet distribution partition, a cold fluid mainstream partition, a cold outlet distribution partition and a cold outlet diversion partition which are sequentially connected along the flow direction of the cold fluid. The cold inlet diversion partition is connected to the third cold fluid inlet, and the cold outlet diversion partition is connected to the third cold fluid outlet.

5. The plate heat exchanger for flow batteries according to claim 4, characterized in that: The cold inlet diversion partition, the cold fluid mainstream partition and the cold outlet diversion partition are respectively groove structures, and the arrangement direction of each groove in the groove structure is perpendicular to the flow direction of the cold fluid; the cold inlet distribution partition and the cold outlet distribution partition are respectively convex point structures, and the arrangement direction of each convex point in the convex point structure is perpendicular to the flow direction of the cold fluid.

6. The plate heat exchanger for flow batteries according to claim 1, characterized in that: The end flow field area includes a hot liquid inlet guide end partition, a hot liquid inlet distribution end partition, a hot fluid mainstream end partition, a hot liquid outlet distribution end partition and a hot liquid outlet guide end partition which are sequentially connected along the flow direction of the hot fluid, the hot liquid inlet guide end partition is connected to the fourth hot fluid inlet, and the hot liquid outlet guide end partition is connected to the fourth hot fluid outlet.

7. The plate heat exchanger for flow batteries according to claim 6, characterized in that: The hot liquid inlet guide end partition, the hot fluid main flow end partition and the hot liquid outlet guide end partition are respectively groove structures, and the arrangement direction of each groove in the groove structure is perpendicular to the flow direction of the hot fluid; The hot liquid inlet distribution end partition and the hot liquid outlet distribution end partition are respectively convex point structures, and the arrangement direction of each convex point in the convex point structure is perpendicular to the flow direction of the hot fluid.

8. The plate heat exchanger for flow batteries according to claim 1, characterized in that: The front end plate, the rear end plate, the hot flow field plate, the cold flow field plate and the sealing end plate are respectively provided with front positioning holes, rear positioning holes, hot positioning holes, cold positioning holes and end positioning holes aligned along the first direction, and the liquid flow battery plate heat exchanger also includes positioning parts penetrating the front positioning holes, rear positioning holes, hot positioning holes, cold positioning holes and end positioning holes.

9. The plate heat exchanger for flow batteries according to claim 1, characterized in that: The front end plate and the rear end plate are respectively provided with a front mounting hole and a rear mounting hole aligned along the first direction, and the liquid flow battery plate heat exchanger also includes a mounting member penetrating the front mounting hole and the rear mounting hole, and the mounting member is located on the outside of the heat exchange body and the sealing end plate.

10. The plate heat exchanger for flow batteries according to claim 1, characterized in that: The liquid flow battery plate heat exchanger also includes a filling material filled in the hot sealing structure, the cold sealing structure, the end sealing structure and the first sealing ring.

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