Lithium battery test box with heat insulation function

Abstract

The utility model discloses a lithium battery test box with a heat insulation function in the field of lithium battery test devices, which comprises a constant temperature box body used for providing a constant temperature environment for a lithium battery test, and the box wall of the constant temperature box body is provided with a wire socket for connecting a wire; the battery box is arranged in the constant temperature box, the lithium battery is arranged in the battery box, the battery box comprises a rectangular box and a box cover, the bottom surface of the rectangular box is provided with a cross-shaped supporting edge, the side wall of the rectangular box is provided with a plurality of telescopic lifting pins penetrating through the side wall of the rectangular box, and the telescopic lifting pins are arranged at intervals in the horizontal direction; the lithium battery testing device has the beneficial effects that the lithium battery is placed in the battery box, so that the influence of the constant-temperature action of the constant-temperature box body on the test result in the test process can be reduced, the battery box can adapt to the lithium batteries with different sizes, and the test is convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of lithium battery testing devices, in particular to a lithium battery testing box with a heat insulation function. Background Art

[0002] The heat generated by lithium-ion batteries is mainly divided into two parts, one is the Joule heat of the battery, and the other is the reaction heat of the battery. In addition, there is heat generated in the mixing process caused by the concentration change of the material inside the battery, and side reaction heat caused by various side reactions other than lithium ion insertion and deinsertion reactions. Generally speaking, the values ​​of mixing heat and side reaction heat are very small and can be ignored. The above principle is applicable to the heat generation process of lithium-ion batteries under common charging and discharging. However, pulse heating has current switching, which is not exactly the same as the common DC charging and discharging process. Whether there are other mechanisms is still unclear. Especially when the cycle is at the second level or smaller time scale, it is likely to show a nonlinear superposition of DC characteristics and AC characteristics, and DC impedance and AC impedance have different characteristics. In addition, the heat generation problem is mainly related to impedance, but there is still heat generated by other electrochemical reactions. Therefore, it is very necessary to study the heat generation law of pulse heating method.

[0003] In the existing pulse heating experiment on lithium batteries, the lithium batteries are usually placed directly in an incubator, and the temperature in the incubator is controlled at a constant value through the cooling device of the incubator before the experiment begins. The lithium batteries are then connected to the charger and discharger, and the thermocouples of the charger and discharger are extended into the incubator to synchronously collect the temperature rise of the batteries. However, due to the low matching degree between the existing incubator and the lithium battery pulse experiment, the experimental results have large errors. The main source of the error is that when the temperature inside the incubator rises, the incubator will automatically lower the internal temperature to the set temperature value. At this time, the cold air will produce convection heat dissipation for the internal lithium battery, which will cause large errors in the results of the lithium battery pulse heating experiment.

[0004] The existing solution is to use a carton or other box to install the lithium battery in the box, and place the box in a temperature chamber. However, this method has poor insulation effect and the lithium battery cannot be effectively fixed inside the box because the box and the lithium battery do not match.

[0005] To this end, we propose a lithium battery test box with heat insulation function. Summary of the invention

[0006] In view of the above-mentioned deficiencies in the prior art, the utility model provides a lithium battery test box with a heat insulation function.

[0007] In order to achieve the above-mentioned invention object, the technical solution adopted by the utility model is:

[0008] A lithium battery test box with a heat insulation function comprises a constant temperature box body: used for providing a constant temperature environment for lithium battery testing, and a wire socket for connecting wires is arranged on the box wall of the constant temperature box body; a battery box: placed in the constant temperature box, the lithium battery is arranged inside the battery box, the battery box comprises a rectangular box and a box cover, the bottom surface of the rectangular box is provided with a cross-shaped supporting edge, and the side wall of the rectangular box is provided with a plurality of telescopic top pins penetrating the side wall of the rectangular box, and the plurality of telescopic top pins are arranged at intervals in the horizontal direction.

[0009] By placing the battery box in a constant temperature box, the lithium battery is arranged inside the battery box, and the constant temperature box provides a constant temperature environment for the battery pulse experiment. By setting up a battery box, the cold air blown out by the constant temperature box to maintain a constant temperature during the experiment can be prevented from affecting the heating of the lithium battery itself, thereby improving the accuracy of the test results. The cross-shaped supporting edges and the telescopic top pins on the side walls are arranged on the bottom of the rectangular box to fix the lithium battery placed in the rectangular box. The supporting edges and the telescopic top pins can greatly reduce the contact area with the lithium battery, reduce the transfer of heat from the lithium battery itself, and ensure the experimental effect. The telescopic top pin can also adapt to lithium batteries of different sizes by extending different lengths.

[0010] It is further defined that a storage plate is provided in the constant temperature box, ventilation holes are evenly spaced on the storage plate, and the battery box is fixed on the storage plate by a fixing device; fixing the battery box by the fixing device can prevent the battery box from sliding on the storage plate.

[0011] It is further defined that the fixing device includes two completely identical fixing clamps, the fixing clamps include a hinge head, a left clamp arm and a right clamp arm, one end of the left clamp arm and the right clamp arm are hinged on the hinge head, and a clamping spring is also provided in the hinge head. In a non-stressed state, the left clamp arm and the right clamp arm are in a clamped state under the action of the clamping spring, and a through-rod is provided on the bottom surface of the hinge head, and the outer diameter of the through-rod matches the inner diameter of the vent. By setting two fixing clamps, the fixing clamps are in a clamped state in a non-stressed state. When fixing the battery box, the fixing clamps are manually opened, and the through-rod is inserted into the vent to fix the position of the fixing clamps. The battery box is placed in the space after the two fixing clamps are opened, and the fixing clamps are released. The fixing clamps are closed to clamp the battery box. The battery box can be adapted to battery boxes of different sizes according to the different opened sizes, which is very convenient.

[0012] It is further defined that an electrode socket is provided on the box cover, and when the box cover is fully closed, the inside of the electrode socket is electrically connected to the electrode of the lithium battery, and a temperature sensing socket is provided in the center of one side wall of the rectangular box, and a thermocouple is embedded in the temperature sensing socket, and the temperature sensing probe and the temperature sensing socket are electrically connected; the electrode socket and the temperature sensing socket are provided on the battery box, and the wire socket is also provided on the constant temperature box body. When conducting experiments, the lithium battery can be connected to the pulse device located outside the constant temperature box body through the wire. The modularization is stronger, the experiment is more convenient, and the structure is more reasonable.

[0013] It is further defined that the telescopic ejector pin includes a ejector block, an ejector rod and a return spring, a limit block is provided at the tail end of the ejector rod, the ejector rod is passed through the side wall of the rectangular box, the return spring is passed through the ejector rod inside the rectangular box, and the ejector block is detachably connected to the end of the ejector rod inside the rectangular box; the telescopic ejector pin is arranged in this way, when in use, the limit block outside the box body is pulled to drive the ejector rod to move outside the rectangular box, the lithium battery is placed in the rectangular box, the limit block is released, and the ejector rod extends back into the rectangular box due to the action of the return spring, contacts the lithium battery and fixes the lithium battery.

[0014] It is further defined that all the limit blocks on the same side wall of the rectangular box are connected to the same handle; by connecting the limit blocks on the same side wall to the same handle, operation is facilitated, and all the telescopic ejector pins on the same side wall can be pulled out by pulling one handle.

[0015] The beneficial effects of the utility model are as follows: by providing a battery box and placing the lithium battery in the battery box, the influence of the constant temperature action of the constant temperature box on the test result during the test can be reduced, and the battery box can adapt to lithium batteries of different sizes, making the test convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the internal structure of the constant temperature box from a frontal perspective;

[0017] Figure 2 This is a front view of the battery box in an exploded state;

[0018] Figure 3 A top view of the fixing device and the battery box in a matching state;

[0019] Figure 4 for Figure 3 A magnified schematic diagram of part A;

[0020] Figure 5 It is a schematic diagram of the structure of the storage plate;

[0021] Figure 6 This is a front view of the retaining clip in the open state.

[0022] The symbols of the components are as follows:

[0023] Constant temperature box 1, wire socket 11, storage plate 12, vent 121, battery box 2, rectangular box 21, box cover 22, electrode socket 23, temperature sensing socket 24, supporting edge 25, fixing clamp 3, hinge head 31, left clamp arm 32, right clamp arm 33, clamping spring 34, connecting rod 35, telescopic ejector pin 4, ejector block 41, ejector rod 42, return spring 43, limit block 44, handle 45. DETAILED DESCRIPTION

[0024] The specific implementation methods of the utility model are described below to facilitate technical personnel in this technical field to understand the utility model, but it should be clear that the utility model is not limited to the scope of the specific implementation methods. For ordinary technical personnel in this technical field, as long as various changes are within the spirit and scope of the utility model defined and determined by the attached claims, these changes are obvious, and all utility model creations using the concept of the utility model are protected.

[0025] Example:

[0026] like Figure 1-Figure 6 As shown, a lithium battery test box with heat insulation function includes a constant temperature box 1, a battery box 2 and a fixing device. The constant temperature box 1 is used to provide a constant temperature environment for lithium battery testing. A wire socket 11 for connecting wires is provided on the box wall of the constant temperature box 1. A storage plate 12 is provided inside the constant temperature box 1. Ventilation holes 121 are evenly spaced on the storage plate 12. The battery box 2 is fixed to the storage plate 12 by a fixing device. The fixing device includes two identical fixing clips 3. The fixing The clamp 3 includes a hinge head 31, a left clamp arm 32 and a right clamp arm 33. One end of the left clamp arm 32 and the right clamp arm 33 are hinged on the hinge head 31. A clamping spring 34 is also provided in the hinge head 31. In the unstressed state, the left clamp arm 32 and the right clamp arm 33 are in a clamped state under the action of the clamping spring 34. A connecting rod 35 is provided on the bottom surface of the hinge head 31. The outer diameter of the connecting rod 35 matches the inner diameter of the vent hole 121. The lithium battery is arranged inside the battery box 2. The battery box 2 contains The rectangular box 21 includes a rectangular box 21 and a box cover 22. The box cover 22 is provided with an electrode socket 23. When the box cover 22 is fully closed, the inside of the electrode socket 23 is electrically connected to the electrode of the lithium battery. A temperature sensing socket 24 is provided at the center of one side wall of the rectangular box 21. A thermocouple is embedded in the temperature sensing socket 24. The temperature sensing probe is electrically connected to the temperature sensing socket 24. The bottom surface of the rectangular box 21 is provided with a cross-shaped supporting edge 25. The side wall of the rectangular box 21 is provided with a plurality of telescopic tops that penetrate the side wall of the rectangular box 21. Pin 4, several telescopic ejector pins 4 are arranged at intervals in the horizontal direction; the telescopic ejector pin 4 includes an ejector block 41, an ejector rod 42 and a return spring 43, a limit block 44 is provided at the tail of the ejector rod 42, the ejector rod 42 is passed through the side wall of the rectangular box 21, the return spring 43 is passed through the ejector rod 42 inside the rectangular box 21, and the ejector block 41 is detachably connected to the end of the ejector rod 42 inside the rectangular box 21; all the limit blocks 44 located on the same side wall of the rectangular box 21 are connected to the same handle 45.

[0027] By placing the battery box 2 in the constant temperature box 1, the lithium battery is arranged inside the battery box 2, and the constant temperature box 1 provides a constant temperature environment for the battery pulse experiment. By setting up a battery box 2, the cold air blown out by the constant temperature box 1 to maintain a constant temperature during the experiment can be prevented from affecting the heating of the lithium battery itself, thereby improving the accuracy of the test results. An electrode socket 23 and a temperature sensing socket 24 are arranged on the battery box 2, and a wire socket 11 is also arranged on the constant temperature box 1. When conducting an experiment, the lithium battery can be connected to the pulse device located outside the constant temperature box 1 through a wire, which has stronger modularity, more convenient experiments, and a more reasonable structure; fixing the battery box 2 by a fixing device can prevent the battery box 2 from sliding on the storage plate 12; by setting two fixing clips 3, the fixing clips 3 are in a clamping state when not under force. When fixing the battery box 2, the fixing clips 3 are manually opened, and the connecting rod 35 is inserted into the vent 121 to fix the position of the fixing clip 3, and the battery box 2 is placed in the space after the two fixing clips 3 are opened, and the fixing clips 3 are released. The fixing clip 3 is closed to clamp the battery box 2, and can adapt to battery boxes 2 of different sizes according to the different opened sizes, which is very convenient; a cross-shaped supporting edge 25 and a telescopic ejector pin 4 on the side wall are arranged on the bottom surface of the rectangular box 21 to fix the lithium battery placed in the rectangular box 21. The supporting edge 25 and the telescopic ejector pin 4 can greatly reduce the contact area with the lithium battery, reduce the heat transfer of the lithium battery itself, and ensure the experimental effect. The telescopic ejector pin 4 can also adapt to lithium batteries of different sizes by extending to different lengths; the telescopic ejector pin 4 is arranged in this way. When in use, the limit block 44 outside the box body is pulled to drive the ejector rod 42 to move to the outside of the rectangular box 21, and the lithium battery is placed in the rectangular box 21. The limit block 44 is released, and the ejector rod 42 is extended back into the rectangular box 21 due to the action of the return spring 43, and contacts with the lithium battery to fix the lithium battery; by connecting the limit blocks 44 on the same side wall to the same handle 45, the operation is convenient, and all the telescopic ejector pins 4 on the same side wall can be pulled out by pulling one handle 45.

Claims

1. A lithium battery test box with heat insulation function, characterized in that: include: Constant temperature box (1): used to provide a constant temperature environment for lithium battery testing, and a wire socket (11) for connecting wires is provided on the box wall of the constant temperature box (1); A battery box (2) is placed in the constant temperature box, and a lithium battery is arranged inside the battery box (2). The battery box (2) comprises a rectangular box (21) and a box cover (22). The bottom surface of the rectangular box (21) is provided with a cross-shaped supporting edge (25). The side wall of the rectangular box (21) is provided with a plurality of telescopic top pins (4) penetrating the side wall of the rectangular box (21). The plurality of telescopic top pins (4) are arranged at intervals in the horizontal direction.

2. The lithium battery test box with heat insulation function according to claim 1, characterized in that: A storage plate (12) is provided in the constant temperature box (1), ventilation holes (121) are evenly spaced apart on the storage plate (12), and the battery box (2) is fixed to the storage plate (12) by a fixing device.

3. The lithium battery test box with heat insulation function according to claim 2, characterized in that: The fixing device comprises two identical fixing clamps (3), wherein the fixing clamps (3) comprise a hinged head (31), a left clamp arm (32) and a right clamp arm (33), one end of the left clamp arm (32) and the right clamp arm (33) being hinged on the hinged head (31), a clamping spring (34) being arranged inside the hinged head (31), and in a non-stressed state, the left clamp arm (32) and the right clamp arm (33) are in a clamped state under the action of the clamping spring (34), and a connecting rod (35) is arranged on the bottom surface of the hinged head (31), and the outer diameter of the connecting rod (35) matches the inner diameter of the vent hole (121).

4. The lithium battery test box with heat insulation function according to claim 1, characterized in that: The box cover (22) is provided with an electrode socket (23). When the box cover (22) is in a completely closed state, the interior of the electrode socket (23) is electrically connected to the electrode of the lithium battery. A temperature sensing socket (24) is provided at the center of a side wall of the rectangular box (21). A thermocouple is embedded in the temperature sensing socket (24). The temperature sensing probe is electrically connected to the temperature sensing socket (24).

5. The lithium battery test box with heat insulation function according to claim 4, characterized in that: The telescopic ejector pin (4) comprises an ejector block (41), an ejector rod (42) and a return spring (43); a limit block (44) is provided at the tail of the ejector rod (42); the ejector rod (42) is passed through the side wall of the rectangular box (21); the return spring (43) is passed through the ejector rod (42) inside the rectangular box (21); and the ejector block (41) is detachably connected to the end of the ejector rod (42) inside the rectangular box (21).

6. The lithium battery test box with heat insulation function according to claim 5, characterized in that: All the limit blocks (44) located on the same side wall of the rectangular box (21) are connected to the same handle (45).

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