Device for testing cycle life of power battery system

Abstract

The utility model provides a cycle life test device for a power battery system, which relates to the technical field of battery test devices and comprises a support for placing a battery and a moving frame, two cooling mechanisms capable of getting close to each other or getting away from each other are slidably mounted on the moving frame, and the distance between the two cooling mechanisms is adjusted through an adjusting mechanism. The adjusting mechanism adjusts the two cooling mechanisms to be attached to the surface of the battery on the bracket for cooling; according to the utility model, external auxiliary cooling heat dissipation can be carried out on the battery of the liquid-cooling-free system, the temperature of the liquid-cooling-free battery in a standing state is reduced, the rationality of the battery life test is improved, the time required for cooling during the battery test is reduced, and the test efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of battery testing, in particular to a power battery system cycle life test device. Background Art

[0002] Under the background of my country's goal of "achieving carbon peak by 2030 and carbon neutrality by 2060", vigorously developing energy-saving new energy vehicles is an effective way to solve energy and environmental problems, and it is also a powerful measure to achieve national ecological civilization construction. New energy vehicles replacing traditional fuel vehicles has also become the mainstream trend of the future development of the automotive industry, and breaking through the technical barriers of new energy vehicles is also an important part of the development of the entire automotive industry. As the main power source for new energy vehicles, power batteries must focus on improving the performance of power batteries to break through technical barriers. To this end, a large number of electrical performance tests are required, and the power battery cycle life test is an especially important part of the electrical performance test.

[0003] Since temperature has a significant impact on battery life, performance, safety, etc., most battery systems use a battery thermal management system to compensate for the inherent deficiencies of the battery. However, for natural heat dissipation battery systems without liquid cooling, the battery is in a high temperature state for a long time during the charging, discharging and static process of the cycle life test. When the battery is charging and discharging, the battery is in a state of heating up, but in its static state, the battery can be continuously cooled down to the same temperature as the ambient temperature. During the test, the number and frequency of charging and discharging are relatively frequent, and the temperature of the battery will continue to rise. Therefore, continuous charging and discharging is carried out under high battery temperature, which does not conform to the rationality of conventional power consumption. Therefore, the battery life test also has a large deviation, which affects the actual battery life test results; and the conventional static cooling speed is slow, which affects the test efficiency of the entire battery. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide a power battery system cycle life test device to quickly cool down the battery when it is stationary, reduce the cooling time of the battery when it is stationary, and improve the test efficiency of the battery.

[0005] Based on the technical problems existing in the background technology, the utility model proposes a power battery system cycle life test device, including a bracket for placing batteries and a mobile rack, on which two cooling mechanisms that can approach or move away from each other are slidably installed, and the spacing between the two cooling mechanisms is adjusted by an adjustment mechanism, and the adjustment mechanism adjusts the two cooling mechanisms to fit the surface of the battery on the bracket for cooling.

[0006] Preferably, the movable frame comprises a die frame and a movable base frame, and the die frame is mounted on the movable base frame and can slide through the movable base frame.

[0007] Preferably, slide grooves are provided on both sides of the mouth frame, a sliding bracket is installed on the mouth frame and slides through the slide grooves, the cooling mechanism is installed on the sliding bracket, the cooling surfaces of the two cooling mechanisms are opposite to each other, and the adjustment mechanism is installed on the mouth frame and connected to the sliding bracket.

[0008] Preferably, a handle is installed on the mouth frame.

[0009] Preferably, the cooling mechanism comprises a cooling plate and a fine-tuning mechanism, and a plurality of the cooling plates are mounted on a sliding bracket via the fine-tuning mechanism.

[0010] Preferably, the fine-tuning mechanism and the adjusting mechanism have the same driving direction.

[0011] Preferably, the cooling plate is hollow, and the cooling plates on a single sliding bracket are connected by a hose, and a liquid injection hole and a liquid discharge hole are installed on one of the cooling plates.

[0012] Preferably, the bracket comprises a base plate and a heightened frame, the heightened frame is mounted on the base plate, there are intervals between the heightened frames, and the cooling plate is placed between the intervals of the heightened frames and fits the surface of the battery.

[0013] Compared with the prior art, the power battery system cycle life test device proposed by the utility model adopts the above technical solution and achieves the following technical effects:

[0014] The utility model can perform external auxiliary cooling and heat dissipation on batteries without liquid cooling systems, reduce the temperature of batteries without liquid cooling in a static state, improve the rationality of battery life testing, reduce the time required for cooling during battery testing, and increase testing efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall three-dimensional structure of the utility model;

[0016] Figure 2 This is a schematic diagram of the installation structure of the sliding bracket and the mobile rack of the utility model;

[0017] Figure 3 It is a schematic diagram of the cooling mechanism and the sliding bracket installation structure of the utility model.

[0018] In the figure: 1, bracket; 2, movable bracket; 3, cooling mechanism; 4, adjustment mechanism; 21, mouth frame; 22, movable bottom frame; 23, sliding bracket; 211, slide; 31, cooling plate; 32, fine adjustment mechanism; 33, hose; 11, bottom plate; 12, heightening frame. DETAILED DESCRIPTION

[0019] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0020] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0021] Example

[0022] Please refer to Figure 1-Figure 3 The utility model proposes a cycle life test device for a power battery system, including a bracket 1 for placing batteries and a mobile bracket 2. Two cooling mechanisms 3 that can move closer to or farther from each other are slidably mounted on the mobile bracket 2. The spacing between the two cooling mechanisms 3 is adjusted by an adjustment mechanism 4. The adjustment mechanism 4 adjusts the two cooling mechanisms 3 to fit the surface of the battery on the bracket 1 for cooling. In the utility model, the battery is placed on the bracket 1, and the lower surface and the upper surface of the battery are suspended in the air. The mobile bracket 2 can change its position relative to the bracket 1. After the battery is placed, the mobile bracket 2 is moved close to the bracket 1 so that the two cooling mechanisms 3 are respectively placed on the upper and lower surfaces of the battery, and the two cooling mechanisms 3 are adjusted by the adjustment mechanism 4 to fit the battery and quickly cool the battery. The two cooling devices slide longitudinally, that is, slide up and down, and can fit and cool the battery corresponding to the largest plane. When the battery is erected, the two cooling mechanisms 3 can also be set to slide horizontally to fit the surface of the battery for cooling.

[0023] In a specific embodiment, refer to Figure 2The mobile frame 2 includes a mouth-shaped frame 21 and a mobile base frame 22. The mouth-shaped frame 21 is installed on the mobile base frame 22 and can slide through the mobile base frame 22. A pulley is installed at the bottom of the mobile base frame 22, which allows the entire mobile base frame 22 to move. The mouth-shaped frame 21 is a mouth-shaped frame, not a flat plate. At the same time, the mouth-shaped frame is upright and fixed on the mobile base frame 22, that is, the openings at both ends are horizontal. In the utility model, the mouth-shaped bracket 1 can also be replaced by two upright support rods or sliding rods, whose main function is to provide an installation position for the adjustment mechanism 4.

[0024] In a specific embodiment, refer to Figure 2 , slide grooves 211 are arranged on both sides of the mouth frame 21, a sliding bracket 23 is installed on the mouth frame 21 and slides through the slide grooves 211, a cooling mechanism 3 is installed on the sliding bracket 23, and the cooling surfaces of the two cooling mechanisms 3 are opposite to each other, and an adjustment mechanism 4 is installed on the mouth frame 21 and connected to the sliding bracket 23. The mouth frame 21 is formed by connecting four support plates end to end in sequence, and two support plates standing relative to the ground are provided with longitudinal sliding slide grooves 211, and the sliding bracket 23 includes a main rod and a secondary rod, and the main rod and the secondary rod are welded and fixed to each other vertically on a horizontal plane, and the main rod passes through the two slide grooves 211, and a roller is installed on the main rod, and the roller is attached to the surface of the support plate, and the rotation axis of the roller is horizontal. In the utility model, the adjustment mechanism 4 is a cylinder, one end of which is connected to the horizontal support plate, and the other end is connected to the main rod, and the cylinder can drive the entire sliding bracket 23 to slide longitudinally.

[0025] In a specific embodiment, refer to Figure 1 , a handle is installed on the mouth frame 21. The handle on the mouth frame 21 can be convenient for artificial support to move the entire mobile frame 2.

[0026] In a specific embodiment, refer to Figure 1 , Figure 3 The cooling mechanism 3 includes a cooling plate 31 and a fine-tuning mechanism 32. A plurality of cooling plates 31 are mounted on the sliding bracket 23 through the fine-tuning mechanism 32. The cooling plates 31 are rectangular, and the cooling plates 31 form a large rectangle. Each cooling plate 31 is independent of each other, and there is a gap between each cooling plate 31. The fine-tuning mechanism 32 includes an adjustment block and a screw. One end of the screw is rotatably connected to the cooling plate 31. The rotation of the screw can drive the cooling plate 31 to move longitudinally. The plurality of cooling plates 31 can be independently adjusted to cope with the fitting cooling effect of the stepped battery.

[0027] In a specific embodiment, refer to Figure 1 , Figure 3 , the driving direction of the fine-tuning mechanism 32 is the same as that of the adjusting mechanism 4.

[0028] In a specific embodiment, refer to Figure 3The cooling plate 31 is hollow, and the cooling plates 31 on a single sliding bracket 23 are connected by a hose 33, and a liquid injection hole and a liquid discharge hole are installed on one of the cooling plates 31. The cooling plate 31 can be a copper material with fast heat dissipation or a hollow plate with flowing coolant inside. The cooling plate 31 in the utility model is hollow, and the liquid injection hole and the liquid discharge hole are connected to the infusion mechanism to realize the circulation of the entire coolant.

[0029] In a specific embodiment, refer to Figure 1 The bracket 1 includes a bottom plate 11 and a heightening frame 12. The heightening frame 12 is mounted on the bottom plate 11. There are intervals between the heightening frames 12. The cooling plate 31 is placed between the intervals of the heightening frames 12 and fits the surface of the battery. The heightening frame 12 is used to support and heighten the battery, so that the lower surface of the battery can be vacated, a cooling surface of the battery is added, and the cooling effect is further improved.

[0030] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A power battery system cycle life test device, characterized in that: The invention comprises a support (1) for placing batteries and a mobile support (2); two cooling mechanisms (3) are slidably mounted on the mobile support (2) and can move closer to or farther from each other; the spacing between the two cooling mechanisms (3) is adjusted by an adjustment mechanism (4); the adjustment mechanism (4) adjusts the two cooling mechanisms (3) to fit the surface of the battery on the support (1) for cooling.

2. The power battery system cycle life test device according to claim 1, characterized in that: The movable frame (2) comprises a die frame (21) and a movable bottom frame (22); the die frame (21) is mounted on the movable bottom frame (22) and can slide through the movable bottom frame (22).

3. The power battery system cycle life test device according to claim 2, characterized in that: Slide grooves (211) are arranged on both sides of the mouth frame (21); a sliding bracket (23) is installed on the mouth frame (21) and slides through the slide grooves (211); the cooling mechanism (3) is installed on the sliding bracket (23); the cooling surfaces of the two cooling mechanisms (3) are opposite to each other; and the adjustment mechanism (4) is installed on the mouth frame (21) and connected to the sliding bracket (23).

4. The power battery system cycle life test device according to claim 2, characterized in that: A handle is installed on the die frame (21).

5. The power battery system cycle life test device according to claim 1, characterized in that: The cooling mechanism (3) comprises a cooling plate (31) and a fine-tuning mechanism (32); a plurality of cooling plates (31) are mounted on a sliding bracket (23) via the fine-tuning mechanism (32).

6. The power battery system cycle life test device according to claim 5, characterized in that: The fine adjustment mechanism (32) and the adjustment mechanism (4) have the same driving direction.

7. The power battery system cycle life test device according to claim 5, characterized in that: The cooling plate (31) is hollow, and the cooling plates (31) on a single sliding bracket (23) are connected via a hose (33), and a liquid injection hole and a liquid discharge hole are installed on one of the cooling plates (31).

8. The power battery system cycle life test device according to claim 5, characterized in that: The bracket (1) comprises a base plate (11) and an elevated frame (12), wherein the elevated frame (12) is mounted on the base plate (11), and there are intervals between the elevated frames (12). The cooling plate (31) is placed between the intervals of the elevated frames (12) and fits the surface of the battery.

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