Ice water testing device for power battery

Abstract

The utility model discloses a power battery ice water test device, which comprises a test box body and a controller, a water tank is arranged at the bottom in the box body, a lifting mechanism is arranged in the box body, a hollow moving plate for placing a piece to be tested is arranged at the bottom of the lifting mechanism, and a placing area for placing the piece to be tested is configured on the moving plate; a plurality of water spraying heads are arranged in the box body around the placing area, are communicated with an external water supply assembly through water spraying pipes and are arranged in a multi-layer staggered manner; a first temperature adjusting part is arranged in the water tank and is communicated with the water supply assembly through a circulating water pipe; a second temperature adjusting part is arranged in the water supply assembly; a first driving pump is arranged on the water spraying pipe, a switch valve is arranged between the water spraying pipe and each water spraying head, and a second driving pump is arranged on the circulating water pipe; by arranging the water tank and the multiple layers of water spraying heads which are arranged in a staggered mode, the situation that the to-be-tested piece is impacted by ice water or splashed under various use situations can be simulated in the test box body, and the test effect of the test box is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of power battery testing equipment, and more specifically, to an ice water testing device for a power battery. Background Art

[0002] With the continuous development of new energy vehicles, the demand and application of power batteries such as hydrogen fuel cells and lithium batteries are becoming more and more extensive. After the power battery is assembled on the car, due to the harsh and complex application environment of the car, in order to simulate the thermal shock caused by ice water on the power battery used in the splashing area of ​​the vehicle, and simulate the impact of ice water splashing on related components on the power battery when driving on a wet road in winter, an ice water impact test box is needed.

[0003] The ice water shock test box in the prior art can often only perform ice water shock on the DUT (device under test, such as the power battery in this application) by immersion or water spraying. Although the above-mentioned test device has a simple structure, it cannot accurately simulate the various power battery splashing problems encountered during the driving of the car. For example, different cars have different battery assembly positions, and the power battery splashing areas are also different, and the splashing angles are also different.

[0004] Obviously, if we want to more accurately simulate the ice water impact situation that the DUT is subjected to during the actual splashing process, we need to improve the current ice water impact test equipment. Utility Model Content

[0005] In view of the problem that the power battery ice water impact test device in actual use cannot accurately and comprehensively simulate the situation that the battery is impacted by ice water when the car is wading, the purpose of this application is to propose a power battery ice water test device, and the specific scheme is as follows:

[0006] A power battery ice water test device comprises a test box body and a controller, wherein a water tank is arranged at the bottom of the box body, a lifting mechanism is arranged in the box body, a hollow movable plate for placing a to-be-tested piece is arranged at the bottom of the lifting mechanism, and a placement area for placing the to-be-tested piece is arranged on the movable plate;

[0007] A plurality of water spray heads are arranged around the placement area in the box body, and the plurality of water spray heads are connected to the external water supply assembly through water spray pipes and are arranged in multiple layers in an interlaced manner;

[0008] The water tank is provided with a first temperature regulating member, and is connected to the water supply assembly via a circulating water pipe;

[0009] A second temperature regulating member is provided in the water supply assembly;

[0010] The water spray pipe is provided with a first driving pump, and a switch valve is arranged between the water spray pipe and each water spray head, and the circulating water pipe is provided with a second driving pump;

[0011] The first temperature regulating member, the second temperature regulating member, the first driving pump, the second driving pump and the lifting mechanism are all connected to the controller for control.

[0012] Through the above technical solution, when the test piece, such as a power battery, is subjected to ice water impact test, the test box can simulate the splashing situation of the test piece in various use scenarios. The test piece can be immersed in water by using a water tank to realize ice water immersion test. The water flow can be sprayed by the water nozzle to simulate the situation of the test piece being impacted by water flow. At the same time, the above technical solution is provided with two internal and external temperature adjustment parts, which can flexibly and quickly change the temperature of the water in the water tank or water spray pipe during the test, and the control is more precise, which is convenient for improving the test efficiency and accuracy.

[0013] Furthermore, the lifting mechanism includes a plurality of vertically arranged columns and lifting rods slidably arranged with the columns;

[0014] The top of the column is fixedly connected to the top of the box and a slide groove is provided along its length direction, and a limit block is provided at the bottom of the slide groove. The lifting rod is slidably arranged in the column and one end thereof extends out of the box and is connected to the lifting drive member;

[0015] The bottom of one end of the lifting rod extending into the box body is fixedly connected to the moving plate, and the lifting rod is provided with a block adapted to the limit block to prevent the lifting rod from being separated from the column;

[0016] Wherein, the lifting drive device comprises a servo motor, a gear or a pull rope reel is arranged on the rotating shaft of the servo motor, and a rack is arranged on the end of the lifting rod extending out of the box or connected with a pull rope;

[0017] When the lifting rod is lowered to the lowest position, the movable plate is located at the bottom of the water tank.

[0018] Through the above technical solution, the test piece can be stably placed in the water tank, and the lowering distance can be flexibly adjusted, which is convenient for immersing the test piece in ice water or changing the spray angle between the water spray head and the test piece.

[0019] Furthermore, the first temperature regulating member includes a first heating tube disposed at the bottom of the water tank, and a first cooling tube connected to an external refrigeration compressor.

[0020] Through the above technical solution, the water in the water tank can be heated or cooled.

[0021] Furthermore, the water supply assembly includes at least one water storage tank, and the water storage tank is connected to the water tank and the water spray head through a circulating water pipe and a water spray pipe respectively;

[0022] The second temperature regulating member includes a second heating tube and a second cooling tube which are arranged in the water storage tank or are wrapped around the circulating water pipe or the water spraying pipe.

[0023] Through the above technical solution, the temperature of water in the water tank or flowing out of the water tank can be adjusted conveniently and quickly, and the requirements for water temperature adjustment at the water tank or sprinkler head can be met in a short time.

[0024] Furthermore, the water storage tank includes a pure water tank and a salt water tank, both of which are connected to the end of the circulating water pipe and the water spray pipe, and a selection mixing valve is arranged between the two.

[0025] Through the above technical solution, pure water or salt water can be introduced into the test box as needed to simulate the impact of different types of ice water on the test piece, so as to make the test result more accurate.

[0026] Furthermore, a plurality of water inlets and water outlets are arranged on the side wall of the water tank along its circumference, and a plurality of circulation guide pipes and a circulation guide pump are arranged in communication between the water inlets and the water outlets.

[0027] Through the above technical solution, the water in the water tank can flow under the action of the above-mentioned circulation guide pipe and the circulation guide pump, thereby simulating the situation of the test piece wading through water while moving with the vehicle during the test process.

[0028] Furthermore, a guide plate is rotatably provided on the movable plate to guide the flow of water passing through the holes on the movable plate during the lowering process.

[0029] Through the above technical solution, when the movable plate is lowered into a water tank filled with water, water will flow from the openings on the movable plate to the top of the movable plate. During the flow, a water flow in a specific direction will be formed under the guidance of the guide plate to impact the test piece. This can simulate the real situation of water flow impacting the test piece when the vehicle is wading, thereby improving the accuracy of the test results.

[0030] Furthermore, an air blowing assembly is provided at the upper position inside the box body, and an exhaust port is provided on the box body;

[0031] The air blowing assembly includes an air compressor and an air storage tank arranged outside the box, and a plurality of air blowing pipes and a switch valve arranged inside the box, and the air jets of the plurality of air blowing pipes are arranged toward the placement area on the movable plate.

[0032] Through the above technical solution, when the piece to be tested is lifted from the water tank to the upper position of the box, the air blowing component can blow air toward the piece to be tested to remove water on the piece to be tested, thereby more accurately simulating the actual use scenario of the piece to be tested after the vehicle wades through water, making the test results more accurate.

[0033] Furthermore, the opening edge of the water tank is folded outward to form a funnel-shaped folded edge, and the folded edge is sealed and connected to the inner wall of the box body;

[0034] The water inlet end of the circulating water pipe is connected to the bottom of the water tank, and the water outlet end is located at the upper part of the side wall of the water tank.

[0035] Through the above technical solution, the water in the box can eventually be gathered in the water tank, avoiding splashing and overflowing of water to affect other equipment inside and outside the box.

[0036] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0037] (1) By setting up a water tank and multiple layers of staggered sprinkler heads, the test box can simulate various usage scenarios in which the test piece is impacted or splashed by ice water, thereby improving the test effect of the test box;

[0038] (2) By setting two temperature adjustment components inside and outside the box, the temperature of the water in the water tank or the water spray pipe can be changed flexibly and quickly during the test, and the control is more precise, which is convenient for improving the test efficiency and accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 This is an overall schematic diagram of the battery ice water testing device of this application.

[0040] Figure numerals: 1. box body; 2. water tank; 3. moving plate; 4. placement area; 5. column; 6. lifting rod; 7. servo motor; 8. guide plate; 9. water spray head; 10. first heating pipe; 11. first cooling pipe; 12. water storage tank; 13. circulating water pipe; 14. water spray pipe; 15. second heating pipe; 16. second cooling pipe; 17. first driving pump; 18. switch valve; 19. water inlet; 20. water outlet; 21. second driving pump; 22. exhaust port; 23. air blowing pipe. DETAILED DESCRIPTION

[0041] The present invention will be further described in detail below in conjunction with the embodiments and drawings, but the implementation methods of the present invention are not limited thereto.

[0042] A power battery ice water testing device, such as Figure 1As shown, it includes a test box body 1, the box body 1 is a double-layer structure, the inner liner is made of explosion-proof metal material, preferably made of stainless steel plate. In a specific embodiment, the box body 1 is set as a sandwich structure, and a fireproof heat insulation layer is attached. A water tank 2 is set at the bottom of the box body 1, and the opening edge of the water tank 2 is folded outward to form a funnel-shaped folded edge, and the folded edge is sealed and connected to the inner wall of the box body 1. The above design allows the water in the box body 1 to be gathered in the water tank 2 after splashing, so as to avoid the splashing and overflow of water to affect other equipment inside and outside the box body 1.

[0043] A lifting mechanism is arranged in the box 1, and a hollow movable plate 3 for placing the test piece is arranged at the bottom of the lifting mechanism, and a placement area 4 for placing the test piece is arranged on the movable plate 3. The lifting mechanism includes a plurality of vertically arranged columns 5 and a lifting rod 6 slidably arranged with the columns 5. The top of the column 5 is connected to the top of the box 1 by welding or bolts, and a slide groove for the lifting rod 6 to slide is provided along the length direction of the column 5. A limit block is arranged at the bottom of the slide groove, and a block adapted to the limit block is arranged on the lifting rod 6 to prevent the lifting rod 6 from being separated from the column 5. The lifting rod 6 is slidably arranged in the column 5 and one end thereof extends to the outside of the box 1, and is connected to the lifting drive member.

[0044] The bottom of one end of the lifting rod 6 extending into the box body 1 is fixedly connected to the moving plate 3 by bolts. Preferably, the above-mentioned columns 5 are configured in at least two, preferably 3-4 to ensure the stability of the moving plate 3. The columns 5 are made of stainless steel or aluminum alloy profiles. In a specific embodiment, a linear bearing is configured between the lifting rod 6 and the columns 5.

[0045] In the embodiment of the present application, the lifting drive device includes a servo motor 7. In one embodiment, the rotating shaft of the servo motor 7 is connected to a gear after being transmitted through a reduction gear set. Correspondingly, a rack is provided along the length direction of the lifting rod 6 extending out of the box body 1. The lifting and lowering of the lifting rod 6 can be controlled by controlling the rotation of the servo motor 7, and the lifting distance and speed can be precisely controlled. In another embodiment, a pull rope reel is connected to the rotating shaft of the servo motor 7, and a pull rope is connected to one end of the lifting rod 6 extending out of the box body 1. The pull rope is configured as a steel wire rope or a strong nylon rope. The servo motor 7 is controlled to rotate to drive the lifting rod 6 to move up and down along the slide groove on the column 5. Similarly, the speed and position can be precisely controlled.

[0046] The length of the lifting rod 6 is determined according to the height of the internal space of the box body 1. When the lifting rod 6 is lowered to the lowest position, the movable plate 3 is located at the bottom of the water tank 2; when the lifting rod 6 is raised to the maximum position, the movable plate 3 is located at the upper position inside the box body 1.

[0047] The arrangement of the lifting mechanism can stably place the test piece in the water tank 2, and the descending distance can be flexibly adjusted.

[0048] In an optional embodiment, a guide plate 8 is rotatably provided at the hollow position on the movable plate 3. The guide plate 8 is tilted and has a screw formed integrally at the bottom. A threaded groove is provided on the surface of the movable plate 3. The guide plate 8 is rotatably provided on the guide plate 8 via the screw. The direction of the guide plate 8 can be adjusted each time a test is performed to guide the direction of the water flowing through the hollow on the movable plate 3 during the lowering process. When the movable plate 3 is lowered into the water tank 2 containing water, the water will flow from the opening on the movable plate 3 to the top of the movable plate 3. During the flow process, a water flow in a specific direction will be formed under the guidance of the guide plate 8 to impact the test piece, thereby simulating the real situation of the water flow impacting the test piece when the vehicle is wading, thereby improving the accuracy of the test results.

[0049] In addition to simulating the immersion test of the test piece in the water tank 2, in the present application, a plurality of water spray heads 9 are arranged around the placement area 4 in the box 1, and the plurality of water spray heads 9 are connected to the external water supply assembly via the water spray pipe 14. Preferably, the plurality of water spray heads 9 are arranged in a multi-layer staggered arrangement so as to spray water to the test piece from different angles. By setting the water spray heads 9 to spray water, it is possible to simulate a situation in which the test piece is impacted by water. In addition, since the height position of the test piece can be flexibly adjusted, the angle at which the test piece is impacted by the water from the water spray heads 9 can also be changed, that is, a simple structural arrangement can be used to achieve the adjustment of the angle of the sprayed water. In a specific embodiment, a flow meter is provided on the water spray pipe 14.

[0050] The relevant ice water test standards require that when the test piece is impacted, the temperature of the impact ice water must be within a set range and can be continuously adjusted. For this reason, the water tank 2 of the present application is provided with a first temperature adjustment component, and the water tank 2 is connected to the external water supply component via a circulating water pipe 13. The first temperature adjustment component includes a first heating pipe 10 arranged at the bottom of the water tank 2, and a first cooling pipe 11 connected to an external refrigeration compressor. The first cooling pipe 11 is arranged on the side wall of the water tank 2 and adopts a plate-like structure. The above technical solution can heat or cool the water in the water tank 2.

[0051] In practice, due to the large specific heat capacity of water, heating the water by electric heating pipes or cooling the water by compressor plates is inefficient and requires a lot of waiting time. In order to improve the efficiency of the test, a second temperature adjustment component is provided in the water supply assembly of the present application.

[0052] The water supply assembly includes at least one water storage tank 12, and the water storage tank 12 is connected to the water tank 2 and the water spray head 9 through the circulating water pipe 13 and the water spray pipe 14 respectively. The second temperature adjustment member includes a second heating pipe 15 and a second cooling pipe 16 arranged in the water storage tank 12 or coated on the circulating water pipe 13 or the water spray pipe 14. Preferably, the temperature adjustment member is implemented by coating on the circulating water pipe 13 or the water spray pipe 14, such as by a heat exchange structure coaxially arranged inside and outside to achieve the heating or cooling of the water in the circulating water pipe 13 or the water spray pipe 14. The above technical scheme can adjust the temperature of the water in the water storage tank 12 or flowing out from the water storage tank 12 in advance according to the test process. When it is necessary to adjust the temperature of the water in the water tank 2, the water with the set temperature in the water storage tank 12 can be directly introduced into the water tank 2, which is convenient and fast, and can meet the requirements of water temperature adjustment at the water tank 2 or the water spray head 9 in a short time.

[0053] In the embodiment of the present application, the water storage tank 12 includes a pure water tank and a salt water tank, both of which are connected to the ends of the circulating water pipe 13 and the water spray pipe 14, and a selection mixing valve is provided between the two. The above scheme allows pure water or salt water to be introduced into the box body 1 according to the test needs during the test to simulate the impact of different types of ice water on the test piece, so that the test result is more accurate. Due to the design of the mixing valve, the proportion of salt water entering the box body 1 can be controlled, that is, the salt concentration of the water in the box body 1 can be flexibly adjusted according to the needs.

[0054] In the embodiment of the present application, a first driving pump 17 is provided on the water spray pipe 14, and a switch valve 18 is arranged between each water spray head 9. The switch valve 18 is implemented by a solenoid valve, and the above scheme can realize accurate control of the states of multiple water spray heads 9, so as to spray water toward the DUT from different angles, so as to simulate the most realistic use scenario of the DUT.

[0055] In order to make the water in the circulating water pipe 13 flow according to the set process, a second driving pump 21 is provided on the circulating water pipe 13 . The water inlet end of the circulating water pipe 13 is connected to the bottom of the water tank 2 , and the water outlet end is located at the upper part of the side wall of the water tank 2 .

[0056] The first driving pump 17 and the second driving pump 21 are preferably configured as centrifugal water pumps.

[0057] In the present application, a plurality of water inlets 19 and water outlets 20 are arranged on the side wall of the water tank 2 along its circumference, and a plurality of circulation guide pipes and circulation guide pumps are arranged between the water inlets 19 and the water outlets 20. The water in the water tank 2 can flow under the action of the above-mentioned circulation guide pipes and circulation guide pumps, thereby simulating the situation in which the test piece wades through water while moving with the vehicle during the test process.

[0058] In a specific test process, the DUT needs to be immersed in the water tank 2 for multiple times. In order to simulate a more realistic use scenario of the DUT, an air blowing assembly is provided at the upper position in the box 1, and an exhaust port 22 is provided on the box 1. The air blowing assembly includes an air compressor and an air storage tank provided outside the box 1, and multiple air blowing pipes 23 and a switch valve 18 provided inside the box 1. The air jets of the multiple air blowing pipes 23 are provided toward the placement area 4 on the movable plate 3. When the DUT is lifted from the water tank 2 to the upper position of the box 1, the air blowing assembly can blow air to the DUT to remove the water on the DUT, more accurately simulating the actual use scenario of the DUT after the vehicle wades through water, so that the test results are more accurate.

[0059] It should be noted that the various driving components, temperature regulating components and water flow regulating components in the present application, such as the first driving pump 17, the second driving pump 21, the servo motor 7, the first heating tube 10, the switch valve 18, the gate mixing valve, etc., are all connected to the controller control, receive and respond to the control signal of the controller to operate. The controller can adopt a single-chip microcomputer or a PLC control module, which is loaded with at least one test process control program and outputs relevant control signals according to the test process.

[0060] The working principle and beneficial effects of the utility model of this application:

[0061] Place the test piece, such as a power battery, in the corresponding placement area 4 on the movable plate 3, and then control the servo motor 7 to move the test piece to the set position in the box 1. When a water spray test is required, lower the test piece to the first position, start the water spray head 9 set on the water spray pipe 14, and spray water on the test piece from a specific direction; when an immersion test is required, just lower the test piece into the water tank 2. By controlling the first heating tube 10 and the cooling tube, the water temperature in the water tank 2 can be adjusted. When the water temperature in the water tank 2 needs to be adjusted quickly, the water in the external water tank can be introduced into the water tank 2 through the circulating water pipe 13, thereby shortening the interval time of each immersion test under different temperature water conditions and improving the test efficiency. The entire test device can fully and accurately simulate the actual scene experienced by the test piece during the vehicle wading process, which is conducive to improving the accuracy of the test.

[0062] The above is only the preferred implementation of the present application. The protection scope of the present application is not limited to the above embodiments. All technical solutions under the concept of the present application belong to the protection scope of the present application. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the present application should also be regarded as the protection scope of the present application.

Claims

1. A power battery ice water testing device, characterized in that: The test box comprises a box body (1) and a controller, wherein a water tank (2) is arranged at the bottom of the box body (1), a lifting mechanism is arranged in the box body (1), a hollow movable plate (3) for placing the test piece is arranged at the bottom of the lifting mechanism, and a placement area (4) for placing the test piece is arranged on the movable plate (3); A plurality of water spray heads (9) are arranged around the placement area (4) in the box body (1); the plurality of water spray heads (9) are connected to an external water supply component via a water spray pipe (14) and are arranged in multiple layers in an interlaced manner; The water tank (2) is provided with a first temperature regulating component, and is connected to the water supply component via a circulating water pipe (13); A second temperature regulating member is provided in the water supply assembly; The water spray pipe (14) is provided with a first driving pump (17), and a switch valve (18) is arranged between the water spray pipe and each water spray head (9); the circulating water pipe (13) is provided with a second driving pump (21); The first temperature regulating member, the second temperature regulating member, the first driving pump (17), the second driving pump (21) and the lifting mechanism are all connected to the controller for control.

2. The power battery ice water testing device according to claim 1, characterized in that: The lifting mechanism comprises a plurality of vertically arranged columns (5) and a lifting rod (6) slidably arranged with the columns (5); The top of the column (5) is fixedly connected to the top of the box (1) and a slide groove is provided along its length direction, and a limit block is provided at the bottom of the slide groove. The lifting rod (6) is slidably arranged in the column (5) and one end thereof extends to the outside of the box (1) and is connected to the lifting drive member; The bottom of one end of the lifting rod (6) extending into the box body (1) is fixedly connected to the movable plate (3), and a block adapted to the limit block for preventing the lifting rod (6) from being separated from the column (5) is provided on the lifting rod (6); The lifting drive member comprises a servo motor (7), a gear or a pull rope reel is arranged on the rotating shaft of the servo motor (7), and a rack is arranged on one end of the lifting rod (6) extending outside the box body (1) or connected to a pull rope; When the lifting rod (6) is lowered to the lowest position, the movable plate (3) is located at the bottom of the water tank (2).

3. The power battery ice water testing device according to claim 1, characterized in that: The first temperature regulating member comprises a first heating pipe (10) arranged at the bottom of the water tank (2), and a first cooling pipe (11) connected to an external refrigeration compressor.

4. The power battery ice water testing device according to claim 1, characterized in that: The water supply assembly comprises at least one water storage tank (12), and the water storage tank (12) is connected to the water tank (2) and the water spray head (9) via a circulating water pipe (13) and a water spray pipe (14) respectively; The second temperature regulating member comprises a second heating tube (15) and a second cooling tube (16) which are arranged in the water storage tank (12) or are wrapped around the circulating water pipe (13) or the water spraying pipe (14).

5. The power battery ice water testing device according to claim 4, characterized in that: The water storage tank (12) comprises a pure water tank and a salt water tank, both of which are connected to the ends of the circulating water pipe (13) and the water spray pipe (14), and a water mixing valve is provided between the two.

6. The power battery ice water testing device according to claim 1, characterized in that: A plurality of water inlets (19) and water outlets (20) are arranged on the side wall of the water tank (2) along its circumference, and a plurality of circulation guide pipes and a circulation guide pump are arranged in communication between the water inlets (19) and the water outlets (20).

7. The power battery ice water testing device according to claim 1, characterized in that: The movable plate (3) is rotatably provided with a guide plate (8) for guiding the flow direction of water passing through the openings on the movable plate (3) during the lowering process.

8. The power battery ice water testing device according to claim 1, characterized in that: An air blowing assembly is arranged at the upper position inside the box body (1), and an exhaust port (22) is arranged on the box body (1); The air blowing assembly comprises an air compressor and an air storage tank arranged outside the box (1), and a plurality of air blowing pipes (23) and a switch valve (18) arranged inside the box (1), wherein the air jets of the plurality of air blowing pipes (23) are arranged toward a placement area (4) on the movable plate (3).

9. The power battery ice water testing device according to claim 1, characterized in that: The opening edge of the water tank (2) is folded outward to form a funnel-shaped folded edge, and the folded edge is sealed and connected to the inner wall of the box body (1); The water inlet end of the circulating water pipe (13) is connected to the bottom of the water tank (2), and the water outlet end is located at the upper part of the side wall of the water tank (2).

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