Power assembly test board

Abstract

The utility model relates to the technical field of new energy battery detection, in particular to a power assembly test board, which comprises a cold water tank used for storing low-temperature cooling liquid. The hot water tank is used for storing high-temperature cooling liquid; the first pipeline is used for mixing the low-temperature cooling liquid and the high-temperature cooling liquid in proportion to form mixed liquid and inputting the mixed liquid into a water inlet of the battery; the second pipeline is used for guiding the mixed liquid out of the water outlet of the battery; and the warm water tank is communicated with an outlet of the second pipeline. By arranging the warm water tank, backflow cooling liquid can be temporarily stored, and when the cooling liquid in the warm water tank is naturally cooled to the temperature equal to that of low-temperature cooling liquid in the cold water tank, mixed liquid in the warm water tank flows back to the cold water tank through the third pipeline; therefore, the temperature of the low-temperature cooling liquid in the cold water tank is not affected, and the cold water tank does not need to be cooled.

Description

Technical Field

[0001] This utility model relates to the field of new energy battery testing technology, and in particular to a powertrain testing platform. Background Technology

[0002] New energy powertrains mainly include components such as electric motors, gearboxes, and battery packs. The battery pack, as an energy storage device, is responsible for providing electricity to support the operation of the electric motor. The power battery has a closed coolant circulation pipeline inside, which suppresses the temperature rise of the battery through coolant circulation. In order to study the performance of the battery under different ambient temperatures, it is generally necessary to test the battery in a simulated environment in the laboratory. Traditional power battery test laboratories do not have a corresponding external coolant circulation system, so they cannot circulate antifreeze to cool the battery pack. They can only rely on the heat exchange between the battery pack and the external environment (air), which greatly prolongs the test time.

[0003] To address the aforementioned technical issues, Chinese invention patent CN107196012B discloses a hot and cold liquid circulation system for power battery bench testing. This system stores high-temperature and low-temperature coolant in a hot water tank and a cold water tank, respectively. The hot and cold water tanks are connected to the battery's inlet and outlet via pipes and solenoid valves. During operation, the low-temperature and high-temperature coolant are mixed according to the target coolant temperature and then output to the battery inlet. The coolant circulating from the battery returns to the cold and hot water tanks via the battery outlet, forming a closed-loop flow of coolant. This allows for cooling or heating of the battery through the mixing ratio of high-temperature and low-temperature coolant, saving experimental time.

[0004] However, the above solution has the following problems: due to the large temperature difference between the high-temperature coolant and the low-temperature coolant, the temperature of the mixture formed after mixing is between that of the low-temperature coolant and the high-temperature coolant. After flowing back to the hot water tank and the cold water tank, the temperature of the hot water tank will decrease, while the temperature of the cold water tank will increase. It is necessary to use a water-cooled chiller to cool down the returned coolant, while the hot water tank needs to use an electric heating system to heat the returned coolant, which increases the energy consumption of the testing equipment. Utility Model Content

[0005] In view of this, the purpose of this utility model is to propose a powertrain test bench to solve the technical problem that the mixture generated after mixing high-temperature coolant and low-temperature coolant in the existing new energy battery test system will destroy the original temperature of the high-temperature coolant and low-temperature coolant during reflux.

[0006] To achieve the above objectives, this utility model provides a powertrain test bench, comprising:

[0007] Cold water tanks used for storing cryogenic coolant;

[0008] Hot water tanks used for storing high-temperature coolant;

[0009] A first pipeline used to mix the low-temperature coolant and high-temperature coolant in a certain proportion to form a mixture, and to input the mixture into the battery's water inlet;

[0010] A second conduit used to drain the mixture from the battery's outlet;

[0011] A warm water tank connected to the outlet of the second pipeline;

[0012] Temperature detection components are respectively installed in the cold water tank and the warm water tank;

[0013] A third pipeline is used to connect the warm water tank and the cold water tank. When the temperature of the mixture in the warm water tank cools down to the same temperature as the low-temperature coolant in the cold water tank, the mixture in the warm water tank is returned to the cold water tank through the third pipeline.

[0014] As a preferred embodiment of this invention, the test bench further includes a bracket for fixing the cold water tank, the hot water tank, and the warm water tank.

[0015] As a preferred embodiment of this utility model, the first pipeline includes:

[0016] A first conduit connected at one end to the cold water tank;

[0017] A second conduit connected at one end to the hot water tank;

[0018] A water inlet proportional three-way solenoid valve whose inlet end is connected to the other end of both the first and second conduits.

[0019] A first water pump and a third conduit are connected to the outlet end of the inlet proportional three-way solenoid valve, and one end of the third conduit is connected to the inlet of the battery.

[0020] As a preferred embodiment of this utility model, the second pipeline includes a fourth conduit with one end connected to the water outlet of the battery, and the other end of the fourth conduit connected to a warm water tank.

[0021] As a preferred embodiment of this utility model, the third pipeline includes:

[0022] A fifth conduit, one end of which is connected to the warm water tank, and the other end of which is connected to the cold water tank;

[0023] A second water pump connected to the fifth conduit.

[0024] As a preferred embodiment of this utility model, the hot water tank is equipped with an electric heating system for heating the coolant, and the cold water tank is connected to a water-cooled refrigeration unit for cooling the coolant.

[0025] As a preferred embodiment of this invention, the test bench further includes a platform connected to the bracket, the upper end of which has a support surface for supporting the battery.

[0026] As a preferred embodiment of this utility model, the upper end of the platform is provided with a clamping assembly for clamping the battery. The clamping assembly includes at least two clamping parts symmetrically arranged relative to the platform. Each clamping part includes:

[0027] A plate with threaded grooves is located at the upper end of the platform;

[0028] A threaded rod with one end threadedly connected to the threaded groove;

[0029] A clamping plate rotatably connected to the other end of the threaded rod forms a positioning space for the positioning battery between the clamping plates of the plurality of clamping parts.

[0030] As a preferred embodiment of this utility model, a turntable is provided at one end of the threaded rod, and a sleeve is provided at the end of the clamping plate facing the threaded rod, wherein the sleeve is rotatably engaged with the turntable.

[0031] As a preferred embodiment of this invention, the test bench further includes multiple electric push rods with bases fixed to the support, and the output end of the electric push rods is connected to the bottom of the platform.

[0032] The beneficial effects of this utility model are as follows: By setting up a warm water tank, this utility model can temporarily store the returned coolant. When the coolant in the warm water tank naturally cools down to the same temperature as the low-temperature coolant in the cold water tank, the mixture in the warm water tank is returned to the cold water tank through a third pipeline. Since the temperature of the mixture is the same as that of the low-temperature coolant, it will not affect the temperature of the low-temperature coolant inside the cold water tank, eliminating the need to cool the cold water tank and achieving energy-saving circulation. Attached Figure Description

[0033] To more clearly illustrate the technical solutions in this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only for this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0034] Figure 1 This is a schematic diagram of the external three-dimensional structure of the present invention;

[0035] Figure 2This is a three-dimensional structural diagram of the cold water tank, warm water tank, hot water tank, and battery of this utility model;

[0036] Figure 3 This is a partial three-dimensional structural diagram of the platform, threaded rod, and clamping plate of this utility model;

[0037] Figure 4 For the present utility model Figure 3 Enlarged structural diagram at point A in the middle.

[0038] The following are marked in the diagram: 1. Bracket; 2. Cold water tank; 3. Hot water tank; 4. First conduit; 5. Second conduit; 6. Inlet proportional three-way solenoid valve; 7. Third conduit; 8. First water pump; 9. Battery; 10. Inlet; 11. Fourth conduit; 12. Warm water tank; 13. Fifth conduit; 14. Second water pump; 15. Electric push rod; 16. Platform; 17. Plate; 18. Threaded rod; 19. Threaded groove; 20. Clamping plate; 21. Sleeve; 22. Turntable; 23. Outlet. Detailed Implementation

[0039] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to specific embodiments.

[0040] It should be noted that, unless otherwise defined, the technical or scientific terms used in this utility model should have the ordinary meaning understood by one of ordinary skill in the art to which this utility model pertains. The terms "first," "second," and similar terms used in this utility model do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0041] like Figure 1 and Figure 2As shown, a powertrain test bench includes: a cold water tank 2 for storing low-temperature coolant; a hot water tank 3 for storing high-temperature coolant; a first pipeline for mixing the low-temperature coolant and the high-temperature coolant in a certain proportion to form a mixture and inputting the mixture into the water inlet 10 of the battery 9; a second pipeline for discharging the mixture from the water outlet 23 of the battery 9; a warm water tank 12 connected to the outlet of the second pipeline; temperature detection components respectively disposed in the cold water tank 2 and the warm water tank 12; and a third pipeline for connecting the warm water tank 12 and the cold water tank 2, wherein when the temperature of the mixture in the warm water tank 12 cools down to the same temperature as the low-temperature coolant in the cold water tank 2, the mixture in the warm water tank 12 is returned to the cold water tank 2 through the third pipeline.

[0042] The above technical solution avoids the backflow of the mixed liquid from affecting the temperature of the coolant in the cold water tank 2 and the hot water tank 3. During use, the low-temperature coolant in the cold water tank 2 and the high-temperature coolant in the hot water tank 3 are mixed in proportion through the first pipeline to form a mixed liquid at the required temperature. The mixed liquid enters the inlet 10 of the battery 9. After circulating from the battery 9, the mixed liquid is sent to the warm water tank 12 through the outlet 23 and the second pipeline. When the mixed liquid is cooled to the same temperature as the low-temperature coolant in the cold water tank 2, the mixed liquid in the warm water tank 12 is returned to the cold water tank 2 through the third pipeline. Since the temperature of the mixed liquid is the same as that of the low-temperature coolant, it will not affect the temperature of the low-temperature coolant inside the cold water tank 2. There is no need to cool down the cold water tank 2, thus achieving energy-saving circulation.

[0043] like Figure 1 As shown, in this embodiment, the test bench also includes a bracket 1 for fixing the cold water tank 2, the hot water tank 3, and the warm water tank 12;

[0044] The above technical solution allows for the convenient placement of cold water tank 2, hot water tank 3, and warm water tank 12.

[0045] like Figure 2 As shown, in this embodiment, the first pipeline includes: a first conduit 4 connected at one end to the cold water tank 2; a second conduit 5 connected at one end to the hot water tank 3; a water inlet proportional three-way solenoid valve 6 connected at the other end of both the first conduit 4 and the second conduit 5; a first water pump 8 and a third conduit 7 connected at the outlet end of the water inlet proportional three-way solenoid valve 6, and one end of the third conduit 7 being connected to the water inlet 10 of the battery 9.

[0046] The above technical solution allows the mixed liquid to be fed into the battery 9. Low-temperature coolant flows into the inlet proportional three-way solenoid valve 6 through the first conduit 4, and high-temperature coolant flows into the inlet proportional three-way solenoid valve 6 through the second conduit 5. The inlet proportional three-way solenoid valve 6 controls the output ratio of high-temperature and low-temperature coolant according to a set ratio, thereby obtaining the mixed liquid at the desired temperature. The mixed liquid enters the water inlet 10 of the battery 9 through the first water pump 8 and the third conduit 7 to participate in circulation. Specifically, when the target temperature needs to be adjusted, if the coolant needs to be heated, the inlet proportional three-way solenoid valve 6 is adjusted to increase the proportion of high-temperature coolant, and the target temperature is achieved through feedback from the temperature sensor; if the coolant needs to be cooled, the inlet proportional three-way solenoid valve 6 is adjusted to increase the proportion of low-temperature coolant, and the target temperature is achieved through feedback from the temperature sensor.

[0047] like Figure 3 As shown, in this embodiment, the second pipeline includes a fourth conduit 11 with one end connected to the water outlet 23 of the battery 9, and the other end of the fourth conduit 11 connected to the warm water tank 12.

[0048] The above technical solution allows the refluxed mixture to be introduced into the warm water tank 12.

[0049] like Figure 1 and Figure 2 As shown, in this embodiment, the third pipeline includes: a fifth conduit 13 with one end connected to the warm water tank 12 and the other end of the fifth conduit 13 connected to the cold water tank 2; and a second water pump 14 connected to the fifth conduit 13.

[0050] The above technical solution enables the cooled mixture to be circulated by introducing it into the cold water tank 2 through the fifth conduit 13 and the second water pump 14.

[0051] Furthermore, in this embodiment, the hot water tank 3 is equipped with an electric heating system for heating the coolant, and the cold water tank 2 is connected to a water-cooled refrigeration unit for cooling the coolant.

[0052] The above technical solution can maintain a constant temperature of the coolant inside the cold water tank 2 and the hot water tank 3. The electric heating system can heat the coolant in the hot water tank 3 to 30-40 degrees Celsius, while the cold water tank 2 cools the coolant through a water-cooled refrigeration unit, which can control the temperature at 15-20 degrees Celsius.

[0053] like Figure 1 and Figure 3 As shown, in this embodiment, the test bench also includes a platform 16 connected to the bracket 1, and the upper end of the platform 16 has a support surface for supporting the battery 9.

[0054] The above technical solution allows for convenient placement of battery 9.

[0055] like Figure 3 As shown, in this embodiment, a clamping assembly for clamping the battery 9 is provided at the upper end of the platform 16. The clamping assembly includes at least two clamping parts symmetrically arranged relative to the platform 16. Each clamping part includes: a plate 17 with a threaded groove 19, which is located at the upper end of the platform 16; a threaded rod 18 with one end threadedly connected to the threaded groove 19; and a clamping plate 20 rotatably connected to the other end of the threaded rod 18. Specifically, a turntable 22 is provided at one end of the threaded rod 18, and a sleeve 21 is provided at the end of the clamping plate 20 facing the threaded rod 18. The sleeve 21 rotatably engages with the turntable 22, and a positioning space for positioning the battery 9 is formed between the clamping plates 20 of the multiple clamping parts.

[0056] The above technical solution can fix the battery 9. When the battery 9 is placed on the support surface of the platform 16, the clamping plate 20 can be slid along the platform 16 by rotating the threaded rod 18, so that the clamping plate 20 fits with the battery 9, thereby restricting the movement of the battery 9 and preventing the battery 9 from moving during the test.

[0057] like Figure 1 and Figure 2 As shown, in this embodiment, the test bench also includes multiple electric push rods 15 with bases fixed to the bracket 1, and the output end of the electric push rods 15 is connected to the bottom of the platform 16.

[0058] The above technical solution allows for easy adjustment of the placement height of battery 9.

[0059] Working principle: During operation, the electric heating system heats the coolant in the hot water tank 3 to 30-40 degrees Celsius. The cold water tank 2 cools the coolant using a water-cooled chiller, maintaining the temperature at 15-20 degrees Celsius. The low-temperature coolant flows into the inlet proportional three-way solenoid valve 6 through the first conduit 4, and the high-temperature coolant flows into the inlet proportional three-way solenoid valve 6 through the second conduit 5. The inlet proportional three-way solenoid valve 6 controls the output ratio of the high-temperature and low-temperature coolant according to the set ratio, thus obtaining a mixture at the desired temperature. This mixture is then pumped by the first water pump. 8 and the third conduit 7 enter the water inlet 10 of the battery 9 to participate in the circulation. The mixed liquid enters the water inlet 10 of the battery 9 and after circulating from the battery 9, the mixed liquid is sent to the warm water tank 12 through the water outlet 23 and the fourth conduit 11. When the mixed liquid is cooled to the same temperature as the low temperature coolant in the cold water tank 2, the mixed liquid is introduced into the cold water tank 2 through the fifth conduit 13 and the second water pump 14 to achieve circulation. Since the temperature of the mixed liquid is the same as that of the low temperature coolant, it will not affect the temperature of the low temperature coolant inside the cold water tank 2. There is no need to cool down the cold water tank 2, thus achieving energy-saving circulation.

[0060] Those skilled in the art should understand that the discussion of any of the above embodiments is merely exemplary and is not intended to imply that the scope of the present invention (including the claims) is limited to these examples; within the framework of the present invention, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of the different aspects of the present invention as described above, which are not provided in the details for the sake of brevity.

[0061] This utility model is intended to cover all such substitutions, modifications, and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A power assembly test bench, comprising: a cold water tank (2) for storing low-temperature coolant; a hot water tank (3) for storing high-temperature coolant; a first pipeline for mixing the low-temperature coolant and the high-temperature coolant in a certain proportion to form mixed liquid and inputting the mixed liquid into a water inlet (10) of a battery (9); a second pipeline for leading the mixed liquid out of a water outlet (23) of the battery (9); characterized in that the test bench further comprises: a warm water tank (12) connected to an outlet of the second pipeline; temperature detection components respectively arranged in the cold water tank (2) and the warm water tank (12); a third pipeline for connecting the warm water tank (12) and the cold water tank (2), and when the temperature of the mixed liquid in the warm water tank (12) cools to the same temperature as the low-temperature coolant in the cold water tank (2), the mixed liquid in the warm water tank (12) is returned to the cold water tank (2) through the third pipeline.

2. The powertrain test stand of claim 1, wherein, The test bench further comprises a support (1) for fixing the cold water tank (2), the hot water tank (3) and the warm water tank (12).

3. The powertrain test stand of claim 2, wherein, The first pipeline comprises: a first conduit (4) connected to the cold water tank (2) at one end; a second conduit (5) connected to the hot water tank (3) at one end; a water inlet proportional three-way electromagnetic valve (6) connected to the other ends of the first conduit (4) and the second conduit (5); a first water pump (8) and a third conduit (7) connected to the water outlet of the water inlet proportional three-way electromagnetic valve (6), and the third conduit (7) is connected to the water inlet (10) of the battery (9) at one end.

4. The powertrain test stand of claim 3, wherein, The second pipeline comprises a fourth conduit (11) connected to the water outlet (23) of the battery (9) at one end, and the other end of the fourth conduit (11) is connected to the warm water tank (12).

5. The powertrain test stand of claim 4, wherein, The third pipeline comprises: a fifth conduit (13) connected to the warm water tank (12) at one end, and the other end of the fifth conduit (13) is connected to the cold water tank (2); a second water pump (14) connected to the fifth conduit (13).

6. The powertrain test stand of claim 5, wherein, The hot water tank (3) is provided with an electric heating system for heating the coolant, and the cold water tank (2) is connected with a water-cooled refrigerating machine for cooling the coolant.

7. The powertrain test stand of any of claims 2-6, wherein, The test bench further comprises a platform (16) connected to the support (1), and the upper end of the platform (16) has a supporting surface for supporting the battery (9).

8. The powertrain test stand of claim 7, wherein, The upper end of the platform (16) is provided with a clamping assembly for clamping the battery (9), and the clamping assembly comprises at least two clamping parts symmetrically arranged relative to the platform (16), and the clamping part comprises: a plate (17) provided with a threaded groove (19) at the upper end of the platform (16); a threaded rod (18) threadedly connected to the threaded groove (19) at one end; a clamping plate (20) rotationally connected to the other end of the threaded rod (18), and the clamping plates (20) of the plurality of clamping parts form a positioning space for positioning the battery (9).

9. The powertrain test stand of claim 8, wherein, One end of the threaded rod (18) is provided with a rotating disc (22), and the clamping plate (20) is provided with a sleeve (21) at its end facing the threaded rod (18), the sleeve (21) being rotationally matched with the rotating disc (22).

10. The powertrain test stand of claim 9, wherein, The test bench further comprises a plurality of electric push rods (15) with their output ends connected to the bottom of the platform (16), the electric push rods (15) being fixed to the support frame (1).

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