Lithium battery test box

Abstract

The utility model discloses a lithium battery test box in the field of lithium battery test devices, which comprises a test box body, and a cooling box body is arranged on the test box body. The fixed seat is arranged in the test box body; a battery box and a lithium battery are placed in the battery box, the battery box is fixed in the test box body through a fixing seat, the battery box is provided with a line hole used for connecting the thermocouple and the charging and discharging motor, the test box body is also correspondingly provided with a penetrating connection hole through which a line of the thermocouple and a line of the charging and discharging motor penetrate, and a sealing cover is arranged in the penetrating connection hole; the lithium battery testing device has the beneficial effects that the battery box is arranged, and the battery box and the testing box body are provided with the circuit holes and the penetrating holes through which the circuits penetrate, so that the matching degree of the testing box body and a pulse heating experiment is higher, and the influence of cold air on the temperature of a lithium battery is greatly reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of lithium battery experimental devices, in particular to a lithium battery test box. 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 directly placed 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 lithium battery pulse heating experiment results. In addition, due to the low matching degree, the connection lines of the thermocouples and the charger and discharger are relatively messy.

[0004] To this end, we propose a lithium battery test box. Summary of the invention

[0005] In view of the above-mentioned deficiencies in the prior art, the utility model provides a lithium battery test box.

[0006] In order to achieve the above-mentioned invention object, the technical solution adopted by the utility model is:

[0007] A lithium battery test box comprises a test box body, on which a cooling box body is provided, the cooling box body is used to maintain a constant temperature inside the test box body; a fixing seat, the fixing seat is arranged in the test box body; a battery box, the lithium battery is placed in the battery box, the battery box is fixed in the test box body through the fixing seat, the battery box is provided with a line hole for connecting a thermocouple and a charger and discharger, and the test box body is also provided with a corresponding through hole for the line of the thermocouple and the charger and discharger to pass through, and a sealing cover is provided in the through hole.

[0008] By setting a fixing seat and a battery box inside the experimental box, the lithium battery for the pulse heating experiment is placed in the battery box, and the battery box is fixed in the experimental box by the fixing seat to place it tilted, a line hole for connecting the charger and the thermocouple is opened on the battery box, and a through hole for the line to pass through is opened on the test box to make the lithium battery test box better matched with the battery pulse heating experiment. A cover is set in the through hole so that the experimental box can be used as a normal test box when the lithium battery pulse heating experiment is not carried out, which is more convenient to use. Placing the lithium battery in the battery box can prevent cold air from directly contacting the lithium battery, which can effectively reduce the heat dissipation effect of the cold air blown out by the cooling box during the experiment on the lithium battery.

[0009] It is further defined that adjustment strips are vertically provided on the inner walls on both sides of the test box, and adjustment slots are correspondingly provided on the two adjustment strips. A support plate is provided in the test box, and the two sides of the support plate are clamped in the adjustment slots. A number of ventilation holes are provided on the support plate, and a fixed seat is provided on the support plate. Such an arrangement of the support plate can make the height of the battery box in the test box adjustable, which is more convenient for conducting experiments.

[0010] It is further defined that the battery box includes a lower box body and an upper box cover arranged on the lower box body, the circuit holes include an electric couple hole, a positive electrode hole and a negative electrode hole, the positive electrode hole and the negative electrode hole are both opened on the upper box cover, and the negative electrode hole is opened in the center of the lower box body, and sealing rubber rings are provided in the positive electrode hole, the negative electrode hole and the electric couple hole, and a sealing membrane with an opening is provided in the sealing rubber ring; the bottom surface and side walls of the lower box body are provided with supporting edges, and the outer end surface of the supporting edge is provided with an adjustment slot, and also includes an adjustment edge, one side of the adjustment edge is also provided with an adjustment slot, and the other side is provided with an adjustment ridge matching the adjustment slot.

[0011] The positive electrode hole and the negative electrode hole are opened on the upper box cover to facilitate the connection of the line. The electric couple hole is opened in the center of the lower box body to realize temperature monitoring of the center position of the lithium battery, and the temperature is more accurate. Sealing rubber rings are arranged in the positive electrode hole, the negative electrode hole and the electric couple hole, and a sealing film is arranged in the sealing rubber ring. When the connecting line passes through the corresponding line hole, the sealing film will be pushed open. The sealing film is a soft material and will fit tightly to the connected line, further reducing the influence of the cold air in the test box on the lithium battery inside the battery box. The support ribs are arranged in the battery box, which can greatly reduce the contact area between the lithium battery and the battery box, reduce the heat dissipation influence of the battery box wall contacting the cold air on the lithium battery, further improve the accuracy of the experiment, and set the adjustment ribs. The adjustment ribs are connected to the support ribs through the adjustment convex strips and the adjustment slots to adapt to lithium batteries of different sizes, and the applicability is stronger.

[0012] It is further defined that the fixed seat includes a fixed support and an adjusting support, the fixed support includes a fixed plug rod at the bottom and a fixed baffle arranged on the fixed plug rod, the adjusting support includes an adjusting plug rod at the bottom, an adjusting block arranged on the adjusting plug rod and an adjusting baffle slidably connected to the adjusting block, the outer diameters of the adjusting plug rod and the fixed plug rod are matched with the inner diameter of the vent, the adjusting block is provided with a horizontal sliding groove, the cross-section of the sliding groove is a convex shape, the adjusting baffle is provided with a sliding rod matching the large diameter section of the sliding groove, the sliding rod is provided with a limit screw, the limit screw is threadedly connected to the limit nut, and the limit screw matches the small diameter section of the sliding groove; the fixed seat is arranged in this way so that the fixed seat can have a finer opening adjustment and can adapt to battery boxes of different sizes. The large size can be adjusted by inserting the adjusting plug rod into different vents, and the small size can be adjusted by sliding the sliding rod in the sliding groove and tightening the limit nut, which has higher adaptability.

[0013] It is further defined that a sealing groove is provided on the inner wall of each through hole, and a sealing ring matching the sealing groove is provided on the circumferential surface of the cover; a sealing groove is provided on the inner wall of the through hole, and a sealing ring is provided on the circumferential surface of the cover, so that the sealing performance of the cover can be better when conducting other experiments.

[0014] It is further defined that the cooling box is arranged at the top of the test box, and the cooling air duct of the cooling box is arranged in the up and down direction, with air outlet from the top and air return from the bottom; by arranging the air duct of the cooling box in the up and down direction, the cold air can contact the upper box cover when blowing down, thereby further reducing the influence of the cold air in the cooling box on the temperature of the lithium battery itself in the lithium battery pulse heating experiment.

[0015] The beneficial effects of the utility model are as follows: by setting up a battery box, opening circuit holes and connection holes for circuits to pass through on the battery box and the test box, the test box is more compatible with the pulse heating experiment, which greatly reduces the impact of cold air on the temperature of the lithium battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a front view of the utility model;

[0017] Figure 2 It is a schematic diagram of the internal structure of the test box;

[0018] Figure 3 is a three-dimensional schematic diagram of a battery box;

[0019] Figure 4 for Figure 2 A magnified schematic diagram of part A;

[0020] Figure 5 for Figure 3 A magnified schematic diagram of part B;

[0021] Figure 6 is a structural schematic diagram of a support plate;

[0022] Figure 7 It is a structural schematic diagram of a fixed seat;

[0023] Figure 8 It is a cross-sectional schematic diagram of the adjusting block and the sliding rod.

[0024] The symbols of the components are as follows:

[0025] Test box 1, connection hole 11, fixing seat 2, fixing support 21, fixing rod 211, fixing baffle 212, adjusting support 22, adjusting rod 221, adjusting block 222, adjusting baffle 223, sliding groove 224, sliding rod 225, limiting screw 226, limiting nut 227, battery box 3, thermocouple hole 31, positive hole 32, negative hole 33, sealing rubber ring 34, sealing film 35, cooling box 4, adjusting card strip 5, adjusting card slot 51, supporting plate 6, vent hole 61, sealing cover 7, sealing ring 71, supporting edge 8, adjusting edge 9, adjusting convex strip 91, adjusting slot 10. DETAILED DESCRIPTION

[0026] 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.

[0027] Example:

[0028] like Figure 1-Figure 8As shown, a lithium battery test box includes a test box body 1, a fixing seat 2 and a battery box 3. A cooling box body 4 is provided on the test box body 1. The cooling box body 4 is used to maintain a constant temperature inside the test box body 1. The cooling box body 4 is arranged at the top of the test box body 1. The cooling air duct of the cooling box body 4 is arranged in the up and down direction, with air outlet at the top and return air at the bottom. Adjustment clips 5 are vertically provided on the inner walls of both sides of the test box body 1. Adjustment slots 51 are correspondingly opened on the two adjustment clips 5. A support plate 6 is provided in the test box body 1. Both sides of the support plate 6 are clamped in the adjustment slots 51. A plurality of ventilation holes 61 are opened on the support plate 6. The fixing seat 2 is arranged on the support plate 6. The fixed seat 2 includes a fixed support 21 and an adjustable support 22. The fixed support 21 includes a fixed plug rod 211 at the bottom and a fixed baffle 212 arranged on the fixed plug rod 211. The adjustable support 22 includes an adjustable plug rod 221 at the bottom, an adjusting block 222 arranged on the adjusting plug rod 221, and an adjusting baffle 223 slidably connected to the adjusting block 222. The outer diameters of the adjusting plug rod 221 and the fixed plug rod 211 match the inner diameter of the vent 61. The adjusting block 222 is provided with a horizontal sliding groove 224, and the cross section of the sliding groove 224 is a convex shape. The adjusting baffle 223 is provided with a sliding rod 221 that matches the large diameter section of the sliding groove 224. 25, a limit screw 226 is provided on the sliding rod 225, and a limit nut 227 is threadedly connected to the limit screw 226, and the limit screw 226 matches the small diameter section of the sliding groove 224; the lithium battery is placed in the battery box 3, and the battery box 3 is fixed in the test box 1 through the fixing seat 2, and a line hole for connecting the thermocouple and the charger and discharger is opened on the battery box 3, and a through hole 11 for the line of the thermocouple and the charger and discharger to pass through is also correspondingly opened on the test box 1, and a cover 7 is provided in the through hole 11; the battery box 3 includes a lower box body and an upper box cover arranged on the lower box body, and the line hole includes a thermocouple hole 31, a positive hole 32 and a negative hole 33, and the positive hole The positive electrode hole 32 and the negative electrode hole 33 are both provided on the upper box cover, the negative electrode hole 33 is provided at the center of the lower box body, and the positive electrode hole 32, the negative electrode hole 33 and the electric couple hole 31 are each provided with a sealing rubber ring 34, and a sealing film 35 with an opening is provided in the sealing rubber ring 34; a sealing groove is provided on the inner wall of each penetration hole 11, and a sealing ring 71 matching the sealing groove is clamped on the circumferential surface of the cover 7; a supporting ridge 8 is provided on the bottom surface and the side wall of the lower box body, and an adjusting slot 10 is provided on the outer end surface of the supporting ridge 8, and also includes an adjusting ridge 9, one side of the adjusting ridge 9 is also provided with an adjusting slot 10, and the other side is provided with an adjusting ridge 91 matching the adjusting slot 10.

[0029] By setting a fixing seat 2 and a battery box 3 inside the experimental box, the lithium battery for the pulse heating experiment is placed in the battery box 3, and the battery box 3 is fixed in the experimental box by the fixing seat 2 to place it tilted, a line hole for connecting the charger and the thermocouple is opened on the battery box 3, and a through hole 11 for the line to pass through is opened on the test box 1, so that the lithium battery test box and the battery pulse heating experiment are better matched, and a cover 7 is set in the through hole 11 so that the experimental box can be used as a normal test box when the lithium battery pulse heating experiment is not carried out, which is more convenient to use. Placing the lithium battery in the battery box 3 can prevent cold air from directly contacting the lithium battery, which can In order to effectively reduce the heat dissipation effect of the cold air blown out by the cooling box 4 on the lithium battery during the experiment; the support plate 6 is arranged in this way so that the height of the battery box 3 in the test box 1 can be adjusted, which is more convenient for the experiment; the positive hole 32 and the negative hole 33 are opened on the upper box cover to facilitate the connection of the line, and the thermocouple hole 31 is opened at the center of the lower box to realize temperature monitoring of the center of the lithium battery, and the temperature is more accurate, and a sealing rubber ring 34 is arranged in the positive hole 32, the negative hole 33 and the thermocouple hole 31, and a sealing film 35 is arranged in the sealing rubber ring 34. When the connecting line passes through the corresponding line hole, the sealing film 35 will be pushed open. The sealing film 35 is made of a soft material and will fit closely to the connected circuits, further reducing the impact of the cold air in the test box 1 on the lithium battery in the battery box 3. The support rib 8 is arranged in the battery box 3 to greatly reduce the contact area between the lithium battery and the battery box 3, and reduce the heat dissipation impact of the battery box 3 wall in contact with the cold air on the lithium battery, further improving the accuracy of the experiment. The adjustment rib 9 is arranged, and the adjustment rib 9 is connected to the support rib 8 through the adjustment rib 91 and the adjustment slot 10 to adapt to lithium batteries of different sizes, which is more applicable. The fixing seat 2 is arranged in this way so that the fixing seat 2 can have a finer opening adjustment and can adapt to different sizes. The battery box 3, the large size can be adjusted by inserting the adjustment rod 221 into different ventilation holes 61, and the small size can be adjusted by sliding the sliding rod 225 in the sliding groove 224 and tightening the limit nut 227 to achieve adjustment, which has higher adaptability; a sealing groove is opened on the inner wall of the through hole 11, and a sealing ring 71 is set on the peripheral surface of the cover 7, so that the sealing performance of the cover 7 can be better when conducting other experiments; by setting the air duct of the cooling box 4 in the up and down direction, the cold air can contact the upper box cover when blowing down, further reducing the influence of the cold air in the cooling box 4 on the temperature of the lithium battery itself in the lithium battery pulse heating experiment.

[0030] It should be noted that the test box and the cooling box in this article are both constant temperature box structures in the prior art, so no further explanation will be given.

Claims

1. A lithium battery test box, characterized in that: include: A test box (1), wherein a cooling box (4) is provided on the test box (1), and the cooling box (4) is used to maintain a constant temperature inside the test box (1); A fixing seat (2), wherein the fixing seat (2) is arranged in the test box (1); A battery box (3), wherein a lithium battery is placed in the battery box (3), wherein the battery box (3) is fixed in the test box (1) via the fixing seat (2), wherein the battery box (3) is provided with a circuit hole for connecting a thermocouple and a charger and discharger, and the test box (1) is also provided with a corresponding through hole (11) for the circuit of the thermocouple and the charger and discharger to pass through, wherein a sealing cover (7) is provided in the through hole (11).

2. The lithium battery test box according to claim 1, characterized in that: Adjustment clips (5) are vertically arranged on the inner walls of both sides of the test box (1), and adjustment slots (51) are correspondingly provided on the two adjustment clips (5). A support plate (6) is arranged in the test box (1), and both sides of the support plate (6) are clamped in the adjustment slots (51). A plurality of ventilation holes (61) are provided on the support plate (6), and the fixing seat (2) is arranged on the support plate (6).

3. The lithium battery test box according to claim 1, characterized in that: The battery box (3) comprises a lower box body and an upper box cover arranged on the lower box body, the circuit holes comprise an electric couple hole (31), a positive electrode hole (32) and a negative electrode hole (33), the positive electrode hole (32) and the negative electrode hole (33) are both opened on the upper box cover, the negative electrode hole (33) is opened at the center of the lower box body, the positive electrode hole (32), the negative electrode hole (33) and the electric couple hole (31) are each provided with a sealing rubber ring (34), and a sealing film (35) with an opening is provided in the sealing rubber ring (34); The bottom surface and side wall of the lower box body are both provided with a supporting edge (8), the outer end surface of the supporting edge (8) is provided with an adjusting slot (10), and also includes an adjusting edge (9), one side of the adjusting edge (9) is also provided with an adjusting slot (10), and the other side is provided with an adjusting convex strip (91) matching the adjusting slot (10).

4. The lithium battery test box according to claim 2, characterized in that: The fixed seat (2) comprises a fixed support (21) and an adjustment support (22); the fixed support (21) comprises a fixed plug rod (211) at the bottom and a fixed baffle (212) arranged on the fixed plug rod (211); the adjustment support (22) comprises an adjustment plug rod (221) at the bottom, an adjustment block (222) arranged on the adjustment plug rod (221) and an adjustment baffle (223) slidably connected to the adjustment block (222); the outer diameters of the adjustment plug rod (221) and the fixed plug rod (211) are the same as those of the fixed plug rod (211). The adjusting block (222) is provided with a horizontal sliding groove (224), the cross section of the sliding groove (224) is convex, the adjusting baffle (223) is provided with a sliding rod (225) matching the large diameter section of the sliding groove (224), the sliding rod (225) is provided with a limiting screw (226), the limiting screw (226) is threadedly connected with a limiting nut (227), and the limiting screw (226) matches the small diameter section of the sliding groove (224).

5. The lithium battery test box according to claim 1, characterized in that: A sealing groove is provided on the inner wall of each penetration hole (11), and a sealing ring (71) matching the sealing groove is clamped on the peripheral surface of the sealing cover (7).

6. The lithium battery test box according to claim 1, characterized in that: The cooling box (4) is arranged on the top of the test box (1), and the cooling air duct of the cooling box (4) is arranged in an up-down direction, with air outlet at the top and air return at the bottom.

Images