Auxiliary water tank and vehicle

Abstract

The utility model discloses a kind of vice water tank and vehicle, it is related to vehicle manufacturing technical field, the vice water tank is applicable to fuel cell car, first storage cavity and second storage cavity are formed in the vice water tank and are distributed apart, the first storage cavity is used to store deionized liquid and is used to communicate with electric pile radiator, the second storage cavity is used to store coolant and is used to communicate with motor radiator.The vice water tank of the utility model embodiment, by setting up vice water tank on fuel cell car, and first storage cavity and second storage cavity are formed in the vice water tank, so that the deionized liquid for cooling electric pile and the coolant for cooling motor can be simultaneously stored in the vice water tank, the number of setting of vice water tank can be reduced, the setting cost is reduced, and the volume and weight of vice water tank can be reduced, conducive to setting on vehicle, first storage cavity and second storage cavity are distributed apart, can avoid deionized liquid and coolant mixing, improve the reliability of cooling electric pile and motor.

Description

Technical Field

[0001] This utility model relates to the field of vehicle manufacturing technology, and in particular to an auxiliary water tank and a vehicle. Background Technology

[0002] Liquid hydrogen fuel cell vehicles have a fuel cell cooling system and an electric motor cooling system. The two cooling systems use two independent auxiliary water tanks, which occupy a lot of space and are heavy, making them difficult to install on the vehicle and costing a lot. There is room for improvement. Utility Model Content

[0003] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes an auxiliary water tank that can simultaneously store deionized liquid for cooling the fuel cell stack and coolant for cooling the motor. This reduces the number of auxiliary water tanks required, lowers installation costs, and reduces the volume and weight of the auxiliary water tanks, making it easier to install in vehicles.

[0004] According to an embodiment of the present invention, the auxiliary water tank is suitable for fuel cell vehicles. The auxiliary water tank has a first storage cavity and a second storage cavity that are spaced apart. The first storage cavity is used to store deionized liquid and is used to communicate with the fuel cell stack radiator. The second storage cavity is used to store coolant and is used to communicate with the motor radiator.

[0005] According to the embodiments of the present invention, by setting an auxiliary water tank on a fuel cell vehicle and forming a first storage cavity and a second storage cavity within the auxiliary water tank, the auxiliary water tank can simultaneously store deionized liquid for cooling the fuel cell stack and coolant for cooling the motor. This reduces the number of auxiliary water tanks required, lowers installation costs, and reduces the volume and weight of the auxiliary water tank, facilitating its installation on the vehicle. Furthermore, by distributing the first and second storage cavities separately, the mixing of deionized liquid and coolant can be avoided, improving the reliability of cooling the fuel cell stack and motor.

[0006] According to some embodiments of the present invention, the auxiliary water tank further includes a partition cavity located between the first storage cavity and the second storage cavity.

[0007] According to some embodiments of the present invention, the auxiliary water tank is provided with a plurality of sub-dividing plates in the partition cavity. The plurality of sub-dividing plates are spaced apart in the partition cavity along the length direction of the partition cavity, and divide the partition cavity into a plurality of sub-dividing cavities.

[0008] According to some embodiments of the present invention, the auxiliary water tank is further provided with a first filling port and a second filling port, the first filling port being connected to the first storage cavity and the second filling port being connected to the second storage cavity.

[0009] According to some embodiments of the present invention, the auxiliary water tank is further provided with a first cover and a second cover. The first cover is detachably installed at the first filling port and is used to selectively open or close the first filling port. The second cover is detachably installed at the second filling port and is used to selectively open or close the second filling port.

[0010] According to some embodiments of the present invention, the shape of the first cover is different from that of the second cover; and / or, a first identification mark is provided at the first filling port and a second identification mark is provided at the second filling port; and / or, the first cover and / or the second cover are provided with a vent valve.

[0011] According to some embodiments of the present invention, the auxiliary water tank includes an upper cover and a lower cover, which are spliced ​​together and jointly define the first storage cavity and the second storage cavity.

[0012] According to some embodiments of the present invention, the auxiliary water tank has a first inlet communicating with the first storage cavity and a second inlet communicating with the second storage cavity on the upper cover of the tank body; and / or, the lower cover of the tank body has a first outlet communicating with the first storage cavity and a second outlet communicating with the second storage cavity.

[0013] According to some embodiments of the present invention, the auxiliary water tank has a plurality of first partition plates disposed in the first storage cavity, the plurality of first partition plates being spaced apart and dividing the first storage cavity into a plurality of first chambers, and the first partition plates forming a first connecting groove for connecting two adjacent first chambers; and / or, the second storage cavity has a plurality of second partition plates disposed in the second storage cavity, the plurality of second partition plates being spaced apart and dividing the second storage cavity into a plurality of second chambers, and the second partition plates forming a second connecting groove for connecting two adjacent second chambers.

[0014] This utility model also proposes a vehicle.

[0015] The vehicle according to an embodiment of the present invention includes an electric stack thermal management system, an electric motor cooling system, and an auxiliary water tank as described in any of the above embodiments.

[0016] The vehicle and the aforementioned auxiliary water tank have the same advantages over the prior art, which will not be elaborated here.

[0017] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0018] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which: Figure 1 This is a schematic diagram of the structure of the auxiliary water tank according to an embodiment of the present utility model. Figure 1 ; Figure 2 This is a schematic diagram of the structure of the auxiliary water tank according to an embodiment of the present utility model. Figure 2 ; Figure 3 This is a structural schematic diagram of the box cover according to an embodiment of the present utility model; Figure 4 This is a structural schematic diagram of the lower cover of the box according to an embodiment of the present utility model.

[0019] Figure label: Auxiliary water tank 100, First storage cavity 1, first filling port 11, first cover 12, first partition plate 13, first chamber 14, first connecting groove 15, first outlet 16. Second storage cavity 2, second filling port 21, second cover 22, second partition plate 23, second chamber 24, second connecting groove 25, second outlet 26. Separating cavity 3, sub-separating plate 31, sub-separating cavity 32 Box top cover 4, first inlet 41, second inlet 42. 5. Bottom cover of the enclosure; 6. Temperature sensor; 7. Mounting hole; 8. Mounting clearance hole. Detailed Implementation

[0020] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0021] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," etc., indicating the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, features defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0022] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0023] The following is for reference. Figures 1-4 The auxiliary water tank 100 according to an embodiment of the present utility model can simultaneously store deionized liquid for cooling the fuel cell stack and coolant for cooling the motor. This reduces the number of auxiliary water tanks 100 required, lowers installation costs, and reduces the volume and weight of the auxiliary water tanks 100, making it easier to install in vehicles.

[0024] like Figures 1-4 As shown, according to an embodiment of the present invention, an auxiliary water tank 100 is suitable for fuel cell vehicles. The auxiliary water tank 100 has a first storage cavity 1 and a second storage cavity 2 that are spaced apart. The first storage cavity 1 is used to store deionized liquid and is used to communicate with the fuel cell stack heat sink. The second storage cavity 2 is used to store coolant and is used to communicate with the motor heat sink.

[0025] Specifically, fuel cell vehicles are equipped with a fuel cell stack and a motor. The fuel cell stack is the core energy conversion device, responsible for directly converting the chemical energy of hydrogen into electrical energy. The motor is the power output terminal, used to convert electrical energy into mechanical energy to drive the vehicle. Both the fuel cell stack and the motor generate heat during operation, requiring timely cooling to keep them within a suitable temperature range, thereby improving their reliability and efficiency.

[0026] Furthermore, an auxiliary water tank 100 is installed on the fuel cell vehicle. The auxiliary water tank 100 has a large volume and forms a first storage chamber 1 and a second storage chamber 2 inside it. The first storage chamber 1 is used to store deionized liquid and is connected to the fuel cell stack heat sink, so that the deionized liquid can flow from the first storage chamber 1 to the fuel cell stack heat sink, where it exchanges heat with the fuel cell stack, absorbs the heat from the fuel cell stack, and cools the fuel cell stack. The second storage chamber 2 is used to store coolant and is connected to the motor heat sink, so that the coolant can flow from the second storage chamber 2 to the motor heat sink, where it exchanges heat with the motor, absorbs the heat from the motor, and cools the motor. Thus, the auxiliary water tank 100 can store deionized liquid and coolant at the same time, which can reduce the number of auxiliary water tanks 100, reduce the installation cost, and reduce the volume and weight of the auxiliary water tank 100, which is beneficial for installation on the vehicle.

[0027] Furthermore, the first storage chamber 1 has a large volume, which can store a sufficient amount of deionized liquid to ensure the reliability of cooling the fuel cell stack. The second storage chamber 2 also has a large volume, which can store a sufficient amount of coolant to ensure the reliability of cooling the motor. The first storage chamber 1 and the second storage chamber 2 are distributed separately, such as by installing a partition or other separator in the auxiliary water tank 100. The separator is placed between the first storage chamber 1 and the second storage chamber 2 so that the separator can separate the first storage chamber 1 and the second storage chamber 2, thereby avoiding interference between the internal spaces of the first storage chamber 1 and the second storage chamber 2. This also prevents the deionized liquid in the first storage chamber 1 from mixing with the coolant in the second storage chamber 2, which would prevent reliable cooling of the fuel cell stack and the motor.

[0028] It should be noted that the deionized liquid used to cool the fuel cell stack and the coolant used to cool the motor have different temperatures. Separating the first storage chamber 1 and the second storage chamber 2 can also prevent heat exchange between the deionized liquid and the coolant, which would reduce the reliability of cooling the fuel cell stack and the motor.

[0029] Furthermore, in actual design, the first storage chamber 1 can also be connected to the fuel cell stack to use deionized liquid as an electrolyte, so that the deionized liquid can react with the fuel cell stack to generate electrical energy. This reduces the need for a separate electrolyte storage tank, which helps to reduce setup costs. In addition, using deionized liquid to cool the fuel cell stack can avoid affecting the chemical reaction of the fuel cell stack and improve the reliability of the fuel cell stack in generating electrical energy.

[0030] According to the auxiliary water tank 100 of this utility model embodiment, by setting an auxiliary water tank 100 on a fuel cell vehicle, and forming a first storage cavity 1 and a second storage cavity 2 within the auxiliary water tank 100, the auxiliary water tank 100 can simultaneously store deionized liquid for cooling the fuel cell stack and coolant for cooling the motor. This reduces the number of auxiliary water tanks 100 required, lowers the installation cost, and reduces the volume and weight of the auxiliary water tank 100, facilitating its installation on the vehicle. Furthermore, by distributing the first storage cavity 1 and the second storage cavity 2 separately, the mixing of deionized liquid and coolant can be avoided, improving the reliability of cooling the fuel cell stack and the motor.

[0031] In some embodiments, a partition cavity 3 is also formed inside the auxiliary water tank 100, and the partition cavity 3 is located between the first storage cavity 1 and the second storage cavity 2.

[0032] Specifically, the partition cavity 3 is disposed between the first storage cavity 1 and the second storage cavity 2, so that the partition cavity 3 can separate the first storage cavity 1 and the second storage cavity 2, thereby avoiding interference between the internal spaces of the first storage cavity 1 and the second storage cavity 2. This prevents the deionized liquid in the first storage cavity 1 and the coolant in the second storage cavity 2 from mixing, which would result in unreliable cooling of the fuel cell stack and the motor. Furthermore, the partition cavity 3 is constructed as a cavity structure. Air is a poor conductor of heat, and the stagnant air layer in the cavity can significantly reduce heat conduction and convection. This allows the partition cavity 3 to reliably isolate the first storage cavity 1 and the second storage cavity 2, effectively reducing heat exchange between the deionized liquid and the coolant, and improving the reliability of cooling the fuel cell stack and the motor.

[0033] The partition cavity 3 can be configured to extend along the boundary line between the first storage cavity 1 and the second storage cavity 2, thereby increasing the extension length of the partition cavity 3 and improving the reliability of the partition cavity 3 in separating the first storage cavity 1 and the second storage cavity 2.

[0034] In some embodiments, the partition cavity 3 is provided with a plurality of sub-partition plates 31, which are spaced apart and distributed in the partition cavity 3 along the length direction of the partition cavity 3, and divide the partition cavity 3 into a plurality of sub-partition cavities 32.

[0035] Specifically, the partition cavity 3 is located between the first storage cavity 1 and the second storage cavity 2, and is used to isolate the first storage cavity 1 and the second storage cavity 2. The partition cavity 3 has a relatively long length, such as... Figure 3As shown, a sub-separation plate 31 is provided in the separation cavity 3. The two ends of the sub-separation plate 31 are respectively connected between the two side walls of the separation cavity 3 facing the first storage cavity 1 and the second storage cavity 2. It is used to support the two side walls of the separation cavity 3 inside the separation cavity 3 to ensure that a static air layer can be formed in the separation cavity 3, thereby improving the reliability of separating the first storage cavity 1 and the second storage cavity 2. There are multiple sub-separation plates 31, that is, the number of sub-separation plates 31 can be two, three or more. Thus, multiple sub-separation plates 31 can be set in the separation cavity 3, so that multiple sub-separation plates 31 can be used together to support the two side walls of the separation cavity 3 inside the separation cavity 3, thereby effectively improving the reliability of the operation of the separation cavity 3.

[0036] Furthermore, by distributing multiple sub-separation plates 31 at intervals along the length of the separation cavity 3, the multiple sub-separation plates 31 can be arranged sequentially along the extension direction of the separation cavity 3, so that there is a certain distance between each pair of sub-separation plates 31. Thus, the multiple sub-separation plates 31 can divide the separation cavity 3 into multiple sub-separation cavities 32. The multiple sub-separation cavities 32 can be used together to separate the first storage cavity 1 and the second storage cavity 2, effectively avoiding interference between the internal spaces of the first storage cavity 1 and the second storage cavity 2. Moreover, the multiple sub-separation plates 31 can be supported at multiple positions within the separation cavity 3, thereby forming a static air layer within each of the multiple sub-separation cavities 32, ensuring reliable separation of the first storage cavity 1 and the second storage cavity 2.

[0037] In some embodiments, the auxiliary water tank 100 is further provided with a first filling port 11 and a second filling port 21, the first filling port 11 being connected to the first storage cavity 1 and the second filling port 21 being connected to the second storage cavity 2.

[0038] Specifically, the first filling port 11 is used to connect the first storage cavity 1 to the external space, so as to add deionized liquid into the first storage cavity 1 through the first filling port 11, ensuring that the first storage cavity 1 always maintains a sufficient amount of deionized liquid, thereby ensuring the reliability of cooling the fuel cell stack. At the same time, the second filling port 21 is used to connect the second storage cavity 2 to the external space, so as to add coolant into the second storage cavity 2 through the second filling port 21, ensuring that the second storage cavity 2 always maintains a sufficient amount of coolant, thereby ensuring the reliability of cooling the motor.

[0039] Specifically, by connecting the first filling port 11 to the first storage cavity 1 and the second filling port 21 to the second storage cavity 2, the first filling port 11 and the second filling port 21 can be spaced apart to avoid interference between them, which would prevent the addition of deionized liquid or coolant.

[0040] In some embodiments, the auxiliary water tank 100 is further equipped with a first cover 12 and a second cover 22. The first cover 12 is detachably installed at the first filling port 11 and is used to selectively open or close the first filling port 11. The second cover 22 is detachably installed at the second filling port 21 and is used to selectively open or close the second filling port 21.

[0041] Specifically, the first filling port 11 is used to connect the first storage cavity 1 to the external space. The first cover 12 is detachably installed at the first filling port 11, which makes it easy to connect or separate the first cover 12 from the first filling port 11. For example, it can be connected by screwing or snapping. When the first cover 12 is connected to the first filling port 11, the first cover 12 can close the first filling port 11 to prevent the deionized liquid in the first storage cavity 1 from flowing out. When the first cover 12 is separated from the first filling port 11, the first filling port 11 can be opened to allow deionized liquid to be added to the first storage cavity 1 through the first filling port 11.

[0042] Meanwhile, the second filling port 21 is used to connect the second storage cavity 2 to the external space. The second cover 22 is detachably installed at the second filling port 21, which makes it easy to connect or separate the second cover 22 from the second filling port 21. For example, it can be connected by screwing or snapping. When the second cover 22 is connected to the second filling port 21, the second cover 22 can close the second filling port 21 to prevent the coolant in the second storage cavity 2 from flowing out. When the second cover 22 is separated from the second filling port 21, the second filling port 21 can be opened to allow coolant to be added to the second storage cavity 2 through the second filling port 21.

[0043] In some embodiments, the shape of the first cover 12 is different from the shape of the second cover 22; and / or, a first identification mark is provided at the first filling port 11 and a second identification mark is provided at the second filling port 21; and / or, the first cover 12 and / or the second cover 22 are provided with a vent valve.

[0044] Specifically, the first cover 12 is used to seal the first storage cavity 1, and the second cover 22 is used to seal the second storage cavity 2. The first storage cavity 1 is used to store deionized liquid, and the second storage cavity 2 is used to store coolant. The first cover 12 and the second cover 22 are constructed with different shapes, such as one of the first cover 12 and the other of the second cover 22 being constructed as a circle and the other as a square, so that users can distinguish the first cover 12 and the second cover 22 by their shapes, thereby avoiding filling errors, that is, avoiding filling the first storage cavity 1 with coolant and the second storage cavity 2 with deionized liquid.

[0045] Meanwhile, a first identification mark can be set at the first filling port 11, which can be "deionized liquid" or "first", etc., and a second identification mark can be set at the second filling port 21, which can be "coolant" or "second", etc., to further distinguish the first filling port 11 and the second filling port 21, effectively reducing the possibility of filling errors.

[0046] Additionally, a vent valve can be provided in the first cover 12 to allow for degassing during filling, thereby venting the gas in the deionized liquid and preventing the presence of gas from reducing the reliability of cooling the fuel cell stack. At the same time, a vent valve can also be provided in the second cover 22 to vent the gas in the coolant and prevent the presence of gas from reducing the reliability of cooling the motor.

[0047] In some embodiments, the auxiliary water tank 100 includes an upper cover 4 and a lower cover 5, which are connected together and jointly define a first storage cavity 1 and a second storage cavity 2.

[0048] Specifically, the auxiliary water tank 100 is used to store deionized liquid and coolant. The auxiliary water tank 100 includes an upper cover 4 and a lower cover 5 that are directly opposite each other in the vertical direction. The upper cover 4 and the lower cover 5 are spliced ​​together, such as by welding, so that the auxiliary water tank 100 is a whole structure, which can improve the overall structural strength and operational reliability of the auxiliary water tank 100. The upper cover 4 and the lower cover 5 can jointly define a first storage cavity 1 and a second storage cavity 2, so that the first storage cavity 1 can store deionized liquid and the second storage cavity 2 can store coolant. This can reduce the number of auxiliary water tanks 100, reduce the installation cost, and reduce the volume and weight of the auxiliary water tank 100, which is beneficial for installation on vehicles.

[0049] It should be noted that, for example Figures 1-3 As shown, the first filling port 11 and the second filling port 21 can both be set on the top surface of the upper cover 4 of the box, which makes it convenient for users to operate the first cover 12 and the second cover 22 from above the upper cover 4 of the box to close or open the first filling port 11 and the second filling port 21. It also makes it convenient for users to add deionized liquid to the first storage cavity 1 and coolant to the second storage cavity 2 from above the upper cover 4 of the box, which can reduce the difficulty of operation and improve user satisfaction.

[0050] In some embodiments, the upper cover 4 of the housing is provided with a first inlet 41 communicating with the first storage cavity 1 and a second inlet 42 communicating with the second storage cavity 2; and / or, the lower cover 5 of the housing is provided with a first outlet 16 communicating with the first storage cavity 1 and a second outlet 26 communicating with the second storage cavity 2.

[0051] Specifically, the first inlet 41 is used to connect the fuel cell heat exchanger to the first storage chamber 1, so that the coolant after heat exchange with the fuel cell at the fuel cell heat exchanger can return to the first storage chamber 1 from the first inlet 41. The first outlet 16 is used to connect the first storage chamber 1 to the fuel cell heat exchanger, so that the deionized liquid in the first storage chamber 1 can flow to the fuel cell heat exchanger through the first outlet 16, thereby realizing the unidirectional circulation of the deionized liquid and improving the reliability of cooling the fuel cell. Moreover, by setting the first inlet 41 on the upper cover 4 of the housing and the first outlet 16 on the lower cover 5 of the housing, the first inlet 41 is connected to the upper part of the first storage chamber 1 and the first outlet 16 is connected to the lower part of the first storage chamber 1. This facilitates the flow of deionized liquid into the first storage chamber 1 through the first inlet 41 under the action of gravity, and also facilitates the flow of deionized liquid out of the first storage chamber 1 through the first outlet 16 under the action of gravity, thereby facilitating the unidirectional circulation of the deionized liquid.

[0052] Meanwhile, the second inlet 42 is used to connect the motor heat exchanger and the second storage chamber 2, so that the coolant after exchanging heat with the motor at the motor heat exchanger can return to the second storage chamber 2 from the second inlet 42. The second outlet 26 is used to connect the second storage chamber 2 and the motor heat exchanger, so that the coolant in the second storage chamber 2 can flow to the motor heat exchanger through the second outlet 26, thereby realizing the unidirectional circulation of the coolant and improving the reliability of motor cooling. Moreover, by setting the second inlet 42 on the upper cover 4 of the housing and the second outlet 26 on the lower cover 5 of the housing, the second inlet 42 is connected to the upper part of the second storage chamber 2 and the second outlet 26 is connected to the lower part of the second storage chamber 2. This facilitates the flow of coolant into the second storage chamber 2 through the second inlet 42 under the action of gravity, and also facilitates the flow of coolant out of the second storage chamber 2 through the second outlet 26 under the action of gravity, thereby facilitating the unidirectional circulation of the coolant.

[0053] It should be noted that the first inlet 41 and the second inlet 42 can be set as close as possible to the top of the upper cover 4 of the housing, and the first outlet 16 and the second outlet 26 can be set as close as possible to the bottom of the lower cover 5 of the housing. For example, the first outlet 16 and the second outlet 26 can both be set on the bottom wall of the lower cover 5 of the housing, so as to realize the unidirectional circulation of deionized liquid and coolant.

[0054] And, such as Figures 1-2As shown, there are two first inlets 41, which can be connected to two fuel cell stack radiators respectively, so that the deionized liquid can cool the fuel cell stack at both fuel cell stack radiators at the same time, which can improve the reliability and efficiency of cooling the fuel cell stack. There are also two second inlets 42, which can be connected to two motor radiators respectively, or connected to a motor radiator and an ECU (electronic control unit) respectively, so that the motor and ECU can be cooled separately. This can effectively reduce the number of auxiliary water tanks 100, reduce the installation cost, and reduce the size and weight of the auxiliary water tanks 100, which is beneficial for installation on vehicles.

[0055] In some embodiments, a plurality of first partition plates 13 are provided in the first storage cavity 1, the plurality of first partition plates 13 are spaced apart and divide the first storage cavity 1 into a plurality of first chambers 14, and the first partition plates 13 are formed with first connecting grooves 15 for connecting two adjacent first chambers 14; and / or, a plurality of second partition plates 23 are provided in the second storage cavity 2, the plurality of second partition plates 23 are spaced apart and divide the second storage cavity 2 into a plurality of second chambers 24, and the second partition plates 23 are formed with second connecting grooves 25 for connecting two adjacent second chambers 24.

[0056] Specifically, the first storage chamber 1 has a large volume for storing deionized liquid, such as... Figure 4 As shown, multiple first partition plates 13 are provided in the first storage cavity 1, that is, the number of first partition plates 13 can be two, three or more. The multiple first partition plates 13 are used to divide the first storage cavity 1 into multiple first chambers 14, so that multiple first chambers 14 can be used together to store deionized liquid, which can increase the storage capacity of deionized liquid and ensure the reliability of cooling the fuel cell stack. A first connecting groove 15 is formed on the first partition plate 13, which is used to connect two adjacent first chambers 14. Thus, multiple first chambers 14 can be connected simultaneously through the first connecting groove 15 on multiple first partition plates 13, so that the deionized liquid entering the first storage cavity 1 can flow between multiple first chambers 14, which can increase the flow area of ​​the deionized liquid and facilitate the separation of gas and liquid mixed in the deionized liquid. The separated gas can flow upward to the first filling port 11 and be discharged from the vent valve on the first cover 12, which facilitates gas-liquid separation and improves the reliability of cooling the fuel cell stack.

[0057] It should be noted that the first outlet 16 can be connected to one of the first chambers 14, which can reduce the number of first outlets 16 and facilitate the connection between the first storage chamber 1 and the external pipeline.

[0058] Meanwhile, the second storage cavity 2 has a large volume for storing coolant. Multiple second partition plates 23 are provided in the second storage cavity 2, that is, the number of second partition plates 23 can be two, three or more. Multiple second partition plates 23 are used to divide the second storage cavity 2 into multiple second chambers 24, so that multiple second chambers 24 can be used together to store coolant, which can increase the storage capacity of coolant and ensure the reliability of motor cooling. Furthermore, a second connecting groove 25 is formed on the second partition plate 23 to connect two adjacent second chambers 24. Thus, multiple second chambers 24 can be connected simultaneously through the second connecting groove 25 on multiple second partition plates 23, so that the coolant entering the second storage cavity 2 can flow between multiple second chambers 24, which can increase the flow area of ​​coolant and facilitate the separation of gas and liquid mixed in coolant. The separated gas can flow upward to the second filling port 21 and be discharged from the vent valve on the second cover 22, which facilitates gas-liquid separation and improves the reliability of motor cooling.

[0059] It should be noted that the second outlet 26 can be connected to one of the second chambers 24, which can reduce the number of second outlets 26 and facilitate the connection between the second storage chamber 2 and the external pipeline. In addition, the multiple first partition plates 13 are not all directly opposite each other, which can make the flow path of the deionized liquid in the multiple first chambers 14 maze-like, which can effectively increase the flow area of ​​the deionized liquid and facilitate the discharge of gas in the deionized liquid. Similarly, the multiple second partition plates 23 are not all directly opposite each other, which can make the flow path of the coolant in the multiple second chambers 24 maze-like, which can effectively increase the flow area of ​​the coolant and facilitate the discharge of gas in the coolant.

[0060] And, such as Figure 3 As shown, a temperature sensor 6 is respectively installed in the first storage cavity 1 and the second storage cavity 2. The two temperature sensors 6 are used to measure the temperature of the deionized liquid and the coolant respectively. When the temperatures measured by the two temperature sensors 6 are the same, it indicates that the deionized liquid and the coolant have mixed, and the auxiliary water tank 100 can be replaced in time to ensure reliable cooling of the fuel cell stack and the motor. At the same time, three mounting holes 7 are spaced apart on the lower cover 5 of the tank body. The mounting holes 7 are used to install and fix the auxiliary water tank 100. Connectors can be inserted into the mounting holes 7 to connect the auxiliary water tank 100 to the vehicle body to ensure the reliability of the auxiliary water tank 100. One of the mounting holes 7 is located at the bottom of the partition cavity 3. A mounting clearance hole 8 is provided at the corresponding position on the upper cover 4 of the tank body. The mounting clearance hole 8 is used to avoid connectors or tooling for connection to ensure reliable installation of the auxiliary water tank 100.

[0061] The auxiliary water tank 100 of this application is not limited by the vehicle platform, which improves the platform application design of the product and can be better applied to various vehicle platforms.

[0062] This utility model also proposes a vehicle.

[0063] The vehicle according to an embodiment of the present invention includes an electric fuel cell stack thermal management system, an electric motor cooling system, and an auxiliary water tank 100 according to any one of the above embodiments. The electric fuel cell stack thermal management system includes an electric fuel cell stack and an electric fuel cell stack radiator, with a first storage chamber 1 connected to the electric fuel cell stack radiator, allowing deionized liquid to flow to the electric fuel cell stack radiator for cooling. The electric motor cooling system includes a motor and a motor radiator, with a second storage chamber 2 connected to the motor radiator, allowing coolant to flow to the motor radiator for cooling. Both the first storage chamber 1 and the second storage chamber 2 are formed in the auxiliary water tank 100, allowing the auxiliary water tank 100 to simultaneously store deionized liquid and coolant. This reduces the number of auxiliary water tanks 100 required, lowers installation costs, and reduces the volume and weight of the auxiliary water tank 100, facilitating its installation in vehicles.

[0064] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0065] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A secondary water tank, characterized in that, The auxiliary water tank is suitable for fuel cell vehicles. The auxiliary water tank has a first storage chamber (1) and a second storage chamber (2) that are spaced apart. The first storage chamber (1) is used to store deionized liquid and is used to communicate with the fuel cell stack heat sink. The second storage chamber (2) is used to store coolant and is used to communicate with the motor heat sink.

2. The auxiliary water tank according to claim 1, characterized in that, The auxiliary water tank also has a partition cavity (3) located between the first storage cavity (1) and the second storage cavity (2).

3. The auxiliary water tank according to claim 2, characterized in that, The partition cavity (3) is provided with a plurality of sub-partition plates (31), which are spaced apart along the length of the partition cavity (3) and divide the partition cavity (3) into a plurality of sub-partition cavities (32).

4. The auxiliary water tank according to claim 1, characterized in that, The auxiliary water tank is also provided with a first filling port (11) and a second filling port (21), the first filling port (11) being connected to the first storage cavity (1), and the second filling port (21) being connected to the second storage cavity (2).

5. The auxiliary water tank according to claim 4, characterized in that, The auxiliary water tank is also equipped with a first cover (12) and a second cover (22). The first cover (12) is detachably installed at the first filling port (11) and is used to selectively open or close the first filling port (11). The second cover (22) is detachably installed at the second filling port (21) and is used to selectively open or close the second filling port (21).

6. The auxiliary water tank according to claim 5, characterized in that, The shape of the first cover (12) is different from the shape of the second cover (22); And / or, a first identification mark is provided at the first filling port (11), and a second identification mark is provided at the second filling port (21); And / or, the first cover (12) and / or the second cover (22) are provided with a vent valve.

7. The auxiliary water tank according to claim 1, characterized in that, The auxiliary water tank includes an upper cover (4) and a lower cover (5), which are connected together and jointly define the first storage cavity (1) and the second storage cavity (2).

8. The auxiliary water tank according to claim 7, characterized in that, The top cover (4) of the box is provided with a first inlet (41) communicating with the first storage cavity (1) and a second inlet (42) communicating with the second storage cavity (2). And / or, the lower cover (5) of the housing is provided with a first outlet (16) communicating with the first storage cavity (1) and a second outlet (26) communicating with the second storage cavity (2).

9. The auxiliary water tank according to claim 1, characterized in that, The first storage cavity (1) is provided with a plurality of first partition plates (13), the plurality of first partition plates (13) are spaced apart and divide the first storage cavity (1) into a plurality of first chambers (14), and the first partition plates (13) form a first connecting groove (15), the first connecting groove (15) is used to connect two adjacent first chambers (14); And / or, the second storage cavity (2) is provided with a plurality of second partition plates (23), the plurality of second partition plates (23) are spaced apart and divide the second storage cavity (2) into a plurality of second chambers (24), and the second partition plates (23) form a second connecting groove (25), the second connecting groove (25) is used to connect two adjacent second chambers (24).

10. A vehicle, characterized in that, It includes a fuel cell stack thermal management system, a motor cooling system, and an auxiliary water tank as described in any one of claims 1-9.

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