Water cooling device for lithium battery module performance test

Abstract

The utility model discloses a water cooling device for lithium battery module performance test, which comprises a water tank used for containing cooling water and two rodless cylinders respectively arranged on two sides of the water tank and used for lifting a battery module fixing frame. The battery module fixing frame comprises two inverted-U-shaped supporting plates which are symmetrically arranged and a groove box which is connected with the two inverted-U-shaped supporting plates and used for containing a lithium battery module, the width between two side plates connected with the two inverted-U-shaped supporting plates is smaller than the width of the water tank, and the height of the cooling water is smaller than the height of the lithium battery module; the telescopic end of the rodless air cylinder is connected with the inverted-U-shaped groove bottom of the inverted-U-shaped supporting plate. The battery module fixing frame is lifted through the air cylinder, the battery falls into the cooling water tank through the movement of the air cylinder, heat dissipated by the battery module in the testing process is absorbed by cooling water in the water tank, the effect of cooling the battery is achieved, the safety risk caused by the fact that the temperature of the battery module is too high in the testing process can be reduced, and the testing efficiency is improved. Working efficiency is high and testing cost is low.

Description

Technical Field

[0001] The utility model belongs to the technical field of lithium battery module performance testing, and particularly relates to a water cooling device for lithium battery module performance testing. Background Technique

[0002] With the development of technology and the improvement of people's environmental protection awareness, lithium-ion batteries are increasingly used in people's work and life. As an energy source with high energy density and long life, lithium batteries are widely used in the power and 3C industries. By connecting multiple battery cells in series or parallel to form a polymer lithium-ion soft-pack battery pack, a higher operating voltage and capacity can be obtained, which further expands the application field of lithium batteries.

[0003] In the early verification stage of the polymer lithium-ion soft-pack battery pack, it is necessary to conduct charge and discharge cycle tests to verify it. During the battery cycle test, the charge and discharge data need to meet the requirements promised to customers. At the same time, the consistency of the battery pack is detected, and then the basic performance of the battery pack is evaluated. However, during the test process, the battery pack generates heat and a relatively high temperature. During the process, it is necessary to physically cool the battery pack to reduce or eliminate the safety hazard of the battery catching fire due to high temperature.

[0004] Therefore, a device that can continuously cool down during the test process is needed to provide safety protection for the battery. Content of the Utility Model

[0005] The technical problem to be solved by the utility model is to provide a water cooling device for lithium battery module performance testing in view of the deficiencies in the above-mentioned prior art.

[0006] To solve the above technical problem, the technical solution adopted by the utility model is: a water cooling device for lithium battery module performance testing, characterized in that: it includes a water tank for holding cooling water and two rodless cylinders respectively arranged on both sides of the water tank and used for lifting the battery module fixing frame. The battery module fixing frame includes two symmetrically arranged inverted U-shaped support plates and a trough box connecting the two inverted U-shaped support plates and used for holding the lithium battery module. The width between the two side plates where the two inverted U-shaped support plates are connected is less than the width of the water tank, the height of the cooling water is less than the height of the lithium battery module, and the telescopic end of the rodless cylinder is connected to the bottom of the inverted U-shaped groove of the inverted U-shaped support plate.

[0007] The above-mentioned water cooling device for lithium battery module performance testing is characterized in that: a water tank positioning plate is arranged at the bottom of the water tank, and a bottom plate is arranged at the bottom of the water tank positioning plate.

[0008] The above-mentioned water cooling device for lithium battery module performance testing is characterized in that: the bottom plate is supported by a plurality of support blocks at the bottom.

[0009] The above-mentioned water cooling device for lithium battery module performance testing is characterized in that a drain pipe is installed on the outer side wall of the lower part of the water tank, and a valve is installed on the drain pipe.

[0010] The above-mentioned water cooling device for lithium battery module performance testing is characterized in that: the height of the cooling water in the water tank is 0.6H~0.75H, where H is the height of the lithium battery module; the lithium battery module is a 12-14 string lithium-ion battery combination module, and the water tank is a rectangular water tank with an open upper surface.

[0011] The above-mentioned water cooling device for lithium battery module performance testing is characterized in that the positive electrode and negative electrode of the lithium battery module are respectively connected to the corresponding positive and negative electrodes on the test cabinet.

[0012] Compared with the prior art, the present invention has the following advantages:

[0013] 1. The utility model places the test lithium battery module on the battery pack support frame through the combined connection of the support structure and the water tank, completing the cycle test of the lithium battery at one time, reducing the labor intensity of employees, improving work efficiency, reducing the safety hazards caused by overheating during the battery testing process, and facilitating promotion and use.

[0014] 2. The utility model starts the test output signal through the test cabinet, controls the up and down movement of the rodless cylinder, and links the battery pack fixing frame to rise and fall, and sinks the battery pack into the water tank. During the test process, the heat generated by the battery pack is dissipated through the water in the water tank, thereby achieving the purpose of cooling the battery pack. The charge and discharge cycle test of the lithium battery can be completed safely in one row, reducing the labor intensity of employees, improving work efficiency, and reducing the safety hazards caused by overheating during the battery test process.

[0015] 3. The utility model has a novel and reasonable design and can test lithium batteries with different numbers of strings. It only needs one start-up test to complete the capacity cycle test of the battery pack, which is easy to promote and use.

[0016] To sum up, the design of the utility model is novel and reasonable. The battery module fixing frame is lifted and lowered by the cylinder, and the battery falls into the cooling water tank through the movement of the cylinder. The heat emitted by the battery module during the test is absorbed by the cooling water in the water tank, thereby achieving the effect of cooling the battery. It can reduce the safety risks caused by excessive temperature of the battery module during the test, has high work efficiency, low testing cost, and is easy to promote and use.

[0017] The technical solution of the present invention is further described in detail below through the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is an exploded view of the present invention.

[0019] Figure 2 This is an assembly diagram of the present utility model.

[0020] Figure 3 This is a structural diagram of the battery module fixing frame of the present utility model.

[0021] Description of the accompanying drawings:

[0022] 1—Support block; 2—Bottom plate; 3—Sink positioning plate;

[0023] 4—Rodless cylinder; 5—Water tank; 6—Battery module fixing bracket;

[0024] 6-1—Inverted U-shaped support plate; 6-2—Trough box; 7—Lithium battery module;

[0025] 7-1—Battery positive terminal; 7-2—Battery negative terminal; 8—Drain pipe;

[0026] 9—Valve. DETAILED DESCRIPTION

[0027] like Figures 1 to 3 As shown, the utility model includes a water trough 5 for holding cooling water and two rodless cylinders 4 respectively arranged on both sides of the water trough 5 and used for lifting the battery module fixing frame 6, the battery module fixing frame 6 includes two symmetrically arranged inverted U-shaped support plates 6-1 and a trough box 6-2 connecting the two inverted U-shaped support plates 6-1 and used for holding the lithium battery module 7, the width between the two side plates connected by the two inverted U-shaped support plates 6-1 is smaller than the width of the water trough 5, the height of the cooling water is smaller than the height of the lithium battery module 7, and the telescopic end of the rodless cylinder 4 is connected to the inverted U-shaped trough bottom of the inverted U-shaped support plate 6-1.

[0028] It should be noted that, by connecting the support structure and the water tank combination, the test lithium battery module is placed on the battery pack support frame, and the cycle test of the lithium battery is completed at one time, which reduces the labor intensity of employees' testing, improves work efficiency, and reduces the safety hazards caused by overheating during the battery testing process; the test output signal is started by the test cabinet to control the up and down movement of the rodless cylinder, and the battery pack fixing frame is linked to rise and fall, and the battery pack is sunk into the water tank. The heat generated by the battery pack during the test is dissipated through the water in the water tank, so as to achieve the purpose of cooling the battery pack. The charge and discharge cycle test of the lithium battery can be completed safely in one row, which reduces the labor intensity of employees' testing, improves work efficiency, and reduces the safety hazards caused by overheating during the battery testing process. Lithium batteries with different numbers of combinations can be tested, and the capacity cycle test of the battery pack can be completed with only one start test.

[0029] In this embodiment, a water tank positioning plate 3 is provided at the bottom of the water tank 5 , and a bottom plate 2 is provided at the bottom of the water tank positioning plate 3 .

[0030] In this embodiment, the bottom of the bottom plate 2 is supported by a plurality of support blocks 1.

[0031] In this embodiment, a drain pipe 8 is installed on the outer side wall of the lower part of the water tank 5, and a valve 9 is installed on the drain pipe 8.

[0032] In this embodiment, the height of the cooling water in the water tank 5 is 0.6H to 0.75H, where H is the height of the lithium battery module 7; the lithium battery module 7 is a 12-series to 14-series lithium-ion battery combination module, and the water tank 5 is a rectangular water tank with an open upper surface.

[0033] In this embodiment, the battery positive electrode 7-1 and the battery negative electrode 7-2 of the lithium battery module 7 are respectively connected to the corresponding positive and negative electrodes on the test cabinet.

[0034] It should be noted that the bracket part is a stainless steel material component, and the rodless cylinder is a conventional mechanical cylinder.

[0035] When the present utility model is used, first, water is added to the water tank, the lithium battery module 7 is placed on the tank box 6-2, the battery positive electrode 7-1 and the battery negative electrode 7-2 of the lithium battery module 7 are respectively connected to the corresponding positive and negative electrodes on the test cabinet, the test cabinet is started to test the battery pack, the rodless cylinder is started to lower the lithium battery module 7 into the water tank, and the water level can submerge 3 / 4 of the lithium battery module 7, and too much water cannot be added. During cyclic testing, the test cabinet monitors the test status of the battery pack and the battery temperature in real time. If the battery temperature exceeds the upper limit, the test is terminated and an alarm is prompted. If the battery temperature does not exceed the upper limit, a single start of the test can complete the capacity cyclic test of the battery pack, with high working efficiency and low test cost.

[0036] The above is only a preferred embodiment of the present utility model, and does not impose any limitation on the present utility model. Any simple modification, change, and equivalent structural change made to the above embodiments according to the technical essence of the present utility model still fall within the protection scope of the technical solution of the present utility model.

Claims

1. A water cooling device for performance testing of a lithium battery module, characterized in that: It includes a water tank (5) for holding cooling water and two rodless cylinders (4) respectively arranged on both sides of the water tank (5) and used for lifting the battery module fixing frame (6). The battery module fixing frame (6) includes two symmetrically arranged inverted U-shaped support plates (6-1) and a trough box (6-2) connecting the two inverted U-shaped support plates (6-1) and used for holding the lithium battery module (7). The width between the two side plates where the two inverted U-shaped support plates (6-1) are connected is smaller than the width of the water tank (5). The height of the cooling water is smaller than the height of the lithium battery module (7). The telescopic end of the rodless cylinder (4) is connected to the bottom of the inverted U-shaped groove of the inverted U-shaped support plate (6-1).

2. The water cooling device for performance testing of a lithium battery module according to claim 1, wherein: A water tank positioning plate (3) is arranged at the bottom of the water tank (5), and a bottom plate (2) is arranged at the bottom of the water tank positioning plate (3).

3. The water cooling device for performance testing of a lithium battery module according to claim 2, characterized in that: The bottom of the bottom plate (2) is supported by a plurality of support blocks (1).

4. The water cooling device for performance testing of a lithium battery module according to claim 2, wherein: A drain pipe (8) is installed on the outer side wall of the lower part of the water tank (5), and a valve (9) is installed on the drain pipe (8).

5. The water cooling device for lithium battery module performance testing according to claim 1, characterized in that: The height of the cooling water in the water tank (5) is 0.6H to 0.75H, where H is the height of the lithium battery module (7); the lithium battery module (7) is a 12-series to 14-series lithium-ion battery combination module, and the water tank (5) is a rectangular parallelepiped water tank with an open upper surface.

6. A water cooling device for performance testing of a lithium battery module according to claim 1, characterized in that: The battery positive electrode (7-1) and the battery negative electrode (7-2) of the lithium battery module (7) are respectively connected to the corresponding positive and negative electrodes on the test cabinet.

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