A battery low temperature performance detection device and detection method

Abstract

The present invention relates to the technical field of battery performance detection, and discloses a detection device and method for low-temperature performance of a battery, including a box body, a cold air delivery pipe, a sleeve, a guide mechanism, a base, an air pump, a hose, a recovery pipe and a blocking mechanism, etc. In the present invention, the cold air is diverted and guided by a conical block and a guide plate, and then the cold air is evenly distributed by a gathering ring and a blocking mechanism, thereby solving the problem of uneven temperature in the existing low-temperature test box, which leads to deviation in test results. Specifically, it can ensure that the low temperature to which the battery sample is subjected as a whole is uniform, and avoid the situation in which the surface temperature of the battery is inconsistent due to direct blowing of cold air to a single position, which affects the monitoring data, thereby improving the accuracy of the low-temperature performance detection of the battery, providing a reliable device and method for the low-temperature performance detection of the battery, and facilitating a more accurate evaluation of the performance of the battery in a low-temperature environment.

Description

Technical Field

[0001] The present invention relates to the technical field of battery performance detection, and in particular to a device and method for detecting low-temperature performance of a battery. Background Art

[0002] Battery low temperature performance testing is mainly to evaluate the battery's working ability and performance in low temperature environments.

[0003] When conducting low-temperature performance testing, the temperature in the low-temperature test chamber is uneven. The temperature on the side facing the air outlet is low, while the temperature on the battery facing away from the air outlet or at the top is higher. The temperature of the battery at different positions will vary, resulting in deviations in the test results.

[0004] Based on this, the present invention designs a battery low temperature performance detection device and detection method to solve the above problems. Summary of the invention

[0005] The object of the present invention is to provide a device and method for detecting low temperature performance of a battery, so as to solve the problem that the temperature in the low temperature test box is uneven, the temperature of the battery at different positions may vary, and thus lead to deviations in the test results.

[0006] To achieve the above object, the present invention provides the following technical solution: a battery low temperature performance detection device, comprising a box body, the top of which is connected to a cold air delivery pipe; one end of the cold air delivery pipe is threadedly connected to a sleeve, and one end of the sleeve is connected to a guide mechanism;

[0007] The bottom wall of the box body is provided with a base, and the base is provided with a battery sample;

[0008] Air pumps are provided on both sides of the box body, a hose is provided at the output end of the air pump, a recovery pipe is provided at the input end of the air pump, and the other ends of the hose and the recovery pipe are both penetrated and arranged in the box body;

[0009] A blocking mechanism cooperating with the guiding mechanism is arranged on the inner side wall of the box body.

[0010] Preferably, the guide mechanism includes a conical block, the outer wall of which is connected to a plurality of connecting plates arranged in an array, and the other ends of the plurality of connecting plates are connected to the inner cavity of the cold air delivery pipe, and the bottom of the conical block is connected to a guide plate, which is arranged in a trumpet shape.

[0011] Preferably, the top of the conical block is arranged as a pointed end.

[0012] Preferably, the output end of the hose is arranged in an arc shape, and an arc cover is provided at one end of the arc-shaped arrangement of the hose.

[0013] Preferably, the blocking mechanism comprises an annular plate connected to the inner wall of the box body, the top of the annular plate is provided with a baffle, the outer side wall of the baffle is provided with a plurality of rubber baffle rings arranged in an array, and the top of the annular plate is provided with a gathering ring.

[0014] Preferably, one side of the gathering ring is arranged to be an arc-shaped depression.

[0015] Preferably, an annular cover is provided on the outer side wall of the sleeve.

[0016] Preferably, the plurality of connecting plates are arranged in an inclined shape.

[0017] A method for detecting low temperature performance of a battery comprises the following steps:

[0018] S1. First, place the battery sample on the top of the base and electrically connect the electrode to the detection equipment;

[0019] S2, cold air is input into the sleeve from the cold air delivery pipe, and the cold air flows into the blocking mechanism and accumulates;

[0020] S3, after the cold air accumulates to a certain height, it flows to the bottom of the box cavity;

[0021] S4, the cold air completely submerges the battery sample at the bottom of the box cavity;

[0022] S5. When the temperature reaches the detection requirement, the cold air supply in the cold air delivery pipe is stopped;

[0023] S6. Start the air pump to deliver cold air to the top wall of the box body for circulation.

[0024] Compared with the prior art, the present invention has the following beneficial effects:

[0025] 1. In the present invention, the cold air is diverted and guided by the conical block and the guide plate, and then the cold air is evenly distributed by the focusing ring and the blocking mechanism, so as to ensure that the low temperature of the battery sample as a whole is uniform and consistent, and avoid the situation that the surface temperature of the battery is inconsistent due to the direct blowing of the cold air to a single position, which affects the monitoring data, thereby improving the accuracy of the low temperature performance detection of the battery.

[0026] 2. In the present invention, when cold air accumulates at the bottom of the box, it will completely submerge the battery sample, so that the battery is in a uniform cold air environment; at the same time, the air pump is started to transport the cold air accumulated at the bottom to the top, and the cold air flows to the bottom wall of the box again due to the high density of the cold air and the effect of gravity, avoiding the situation of low temperature at the bottom and high temperature at the top, which greatly improves the uniformity of temperature distribution inside the box.

[0027] 3. In the present invention, the design of the device can effectively control the flow and distribution of cold air, ensuring the stability of the battery during the temperature reduction monitoring process. The blocking of cold air by multiple rubber retaining rings and the circulation of cold air by the air pump jointly ensure the stability of the temperature during the detection process, providing a reliable environment for battery low-temperature performance testing. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic diagram of the three-dimensional structure of the appearance of the present invention;

[0029] Figure 2 It is a schematic diagram of the internal three-dimensional structure of the present invention;

[0030] Figure 3 It is a schematic diagram of the exploded structure of the component guide mechanism and the blocking mechanism of the present invention;

[0031] Figure 4 It is a schematic diagram of the connection structure of the air pump, the hose and the recovery pipeline of the present invention;

[0032] Figure 5 It is a structural schematic diagram of the component guide mechanism of the present invention;

[0033] Figure 6 It is a schematic diagram of the blocking mechanism structure of the present invention;

[0034] Figure 7 It is a schematic diagram of the aggregation ring structure of the present invention;

[0035] Figure 8 It is a schematic diagram of the planar cross-sectional structure of the present invention.

[0036] In the figure: 1. box body; 2. cold air delivery pipe; 3. sleeve; 4. guide mechanism; 5. base; 6. air pump; 7. blocking mechanism; 41. conical block; 42. connecting plate; 43. guide plate; 61. hose; 62. recovery pipe; 71. annular plate; 72. baffle; 73. rubber retaining ring; 74. gathering ring. DETAILED DESCRIPTION

[0037] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0038] See also Figure 1 - Figure 8In an embodiment of the present invention, a device for detecting low temperature performance of a battery includes a box body 1, and a cold air delivery pipe 2 is connected to the top of the box body 1 to facilitate the input of cold air and provide a cold source for the low temperature performance detection of the battery.

[0039] One end of the cold air delivery pipe 2 is threadedly connected to a sleeve 3, and one end of the sleeve 3 is connected to a guide mechanism 4; the threaded connection is convenient for installation and disassembly, and the guide mechanism 4 can guide the cold air so that the cold air flows to the battery sample more effectively.

[0040] A base 5 is provided on the inner bottom wall of the box body 1, and a battery sample is provided on the base 5, which provides a stable placement position for the battery sample to facilitate testing.

[0041] An air pump 6 is provided on both sides of the box body 1, a hose 61 is provided at the output end of the air pump 6, and a recovery pipe 62 is provided at the input end of the air pump 6. The other ends of the hose 61 and the recovery pipe 62 are both penetrated in the box body 1; the air pump 6 can realize the recycling of cold air, improve the utilization efficiency of cold air, and make the temperature in the box body 1 more uniform.

[0042] The inner wall of the box body 1 is provided with a blocking mechanism 7 that cooperates with the guide mechanism 4. The blocking mechanism 7 cooperates with the guide mechanism 4 to better control the flow of cold air and keep the battery sample in a uniform low-temperature environment.

[0043] Furthermore, the guide mechanism 4 includes a conical block 41, and a plurality of connecting plates 42 arranged in an array are connected to the outer wall of the conical block 41, and the other ends of the plurality of connecting plates 42 are connected to the inner cavity of the cold air delivery pipe 2, and a guide plate 43 is connected to the bottom of the conical block 41, and the guide plate 43 is arranged in a trumpet shape. The conical block 41 and the guide plate 43 can divert and guide the cold air, so that the cold air flows to the battery sample more evenly, thereby improving the accuracy of the detection.

[0044] Furthermore, the top of the conical block 41 is a tip setting. The tip setting can reduce the resistance of the cold air flow and make the cold air flow more smoothly.

[0045] Furthermore, the output end of the hose 61 is arranged in an arc shape, and an arc cover is arranged at one end of the arc shape of the hose 61. The arc shape and the arc cover can make the cold air output more uniformly, avoiding the situation of partial overcooling of the battery sample.

[0046] Furthermore, the blocking mechanism 7 includes an annular plate 71, which is connected to the inner wall of the box body 1, a baffle 72 is provided on the top of the annular plate 71, a plurality of rubber baffles 73 arranged in an array are provided on the outer wall of the baffle 72, and a gathering ring 74 is provided on the top of the annular plate 71. The blocking mechanism 7 can effectively block and gather cold air, so that the cold air is more evenly distributed in the box body 1, and the low temperature uniformity of the battery sample is improved.

[0047] Furthermore, one side of the gathering ring 74 is provided with an arc-shaped depression. The arc-shaped depression can better gather the cold air and improve the utilization efficiency of the cold air.

[0048] Furthermore, an annular cover is provided on the outer side wall of the sleeve 3. The annular cover can protect the sleeve 3 and also reduce the leakage of cold air.

[0049] Furthermore, the plurality of connecting plates 42 are arranged in an inclined shape. The connecting plates 42 arranged in an inclined shape can better support the conical block 41 and the guide plate 43, and can also guide the flow direction of the cold air.

[0050] A method for detecting low temperature performance of a battery comprises the following steps:

[0051] S1. First, place the battery sample on the top of the base 5, and electrically connect the electrode to the detection equipment;

[0052] S2, cold air is input into the sleeve 3 from the cold air delivery pipe 2, and the cold air flows into the blocking mechanism 7 and accumulates;

[0053] S3, after the cold air accumulates to a certain height, it flows to the bottom of the inner cavity of the box 1;

[0054] S4, cold air completely submerges the battery sample at the bottom of the inner cavity of the box 1;

[0055] S5. When the temperature reaches the detection requirement, the cold air supply in the cold air delivery pipe 2 is stopped;

[0056] S6, start the air pump 6, and transport the cold air to the top wall of the box body 1 through the air pump 6 for circulation.

[0057] The working principle of the present invention is as follows: firstly, a battery sample is placed on the top of the base 5, and the electrode is electrically connected to the detection equipment, and then the sleeve 3 is installed at the bottom end of the cold air delivery pipe 2; the cold air is input into the sleeve 3 from the cold air delivery pipe 2, and the cold air density is greater than the air density, and it will flow to the bottom, and the cold air will be diverted and guided by the conical block 41, and the cold air flows along the guide plate 43 to the gathering ring 74, and the arc setting of the gathering ring 74 makes the cold air accumulate in the gathering ring 74. In the process, since the cold air has a certain impact force when flowing from the guide plate 43 to the bottom, at this time, the multiple rubber retaining rings 73 can achieve the blocking of the cold air, and prevent the cold air from directly breaking through the blocking of the baffle 72 and directly entering the bottom of the inner cavity of the box body 1;

[0058] The cold air accumulates in the blocking mechanism 7. When the cold air accumulation height exceeds the blocking height of the baffle 72, the cold air flows along the inner wall of the baffle 72 to the bottom of the inner cavity of the box body 1. When the cold air accumulates more and more at the bottom of the inner cavity of the box body 1, the cold air will completely submerge the battery sample, ensuring that the battery is completely submerged in a uniform cold air during the temperature reduction monitoring process. The low temperature received by the battery sample as a whole is uniform, avoiding the situation where the cold air directly blows to a single position, resulting in inconsistent battery surface temperature and affecting the monitoring data.

[0059] Secondly, when the temperature reaches the detection requirement, stop the supply of cold air in the cold air delivery pipe 2; at this time, start the air pump 6, and draw cold air from the bottom through the air pump 6 and transport it to the top wall of the box body 1 through the hose 61. The main function of this operation is to transport the cold air accumulated at the bottom to the top, and because of the high density of the cold air, it flows to the bottom wall of the box body 1 again with the action of gravity, avoiding the low bottom temperature and high top temperature caused by the accumulation of cold air at the bottom due to physical reasons, thereby improving the uniformity of temperature distribution in the box body 1.

[0060] 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 according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A device for detecting low temperature performance of a battery, characterized in that: It comprises a box body (1), the top of which is connected to a cold air delivery pipe (2); one end of the cold air delivery pipe (2) is threadedly connected to a sleeve (3), and one end of the sleeve (3) is connected to a guide mechanism (4); The inner bottom wall of the box body (1) is provided with a base (5), and the base (5) is provided with a battery sample; An air pump (6) is provided on both sides of the box (1); a hose (61) is provided at the output end of the air pump (6); a recovery pipe (62) is provided at the input end of the air pump (6); and the other ends of the hose (61) and the recovery pipe (62) are both provided through the box (1); A blocking mechanism (7) cooperating with the guiding mechanism (4) is provided on the inner side wall of the box body (1).

2. A battery low temperature performance detection device according to claim 1, characterized in that: The guide mechanism (4) comprises a conical block (41), the outer wall of the conical block (41) being connected to a plurality of connecting plates (42) arranged in an array, and the other ends of the plurality of connecting plates (42) being connected to the inner cavity of the cold air delivery pipe (2), and the bottom of the conical block (41) being connected to a guide plate (43), and the guide plate (43) being arranged in a trumpet shape.

3. A battery low temperature performance detection device according to claim 2, characterized in that: The top of the conical block (41) is arranged as a pointed end.

4. A battery low temperature performance detection device according to claim 3, characterized in that: The output end of the hose (61) is arranged in an arc shape, and an arc cover is arranged at one end of the arc-shaped arrangement of the hose (61).

5. A battery low temperature performance detection device according to claim 1, characterized in that: The blocking mechanism (7) comprises an annular plate (71) connected to the inner wall of the box body (1), a baffle (72) being provided at the top of the annular plate (71), a plurality of rubber baffles (73) arranged in an array being provided on the outer wall of the baffle (72), and a gathering ring (74) being provided at the top of the annular plate (71).

6. A battery low temperature performance detection device according to claim 5, characterized in that: One side of the gathering ring (74) is arranged in an arc-shaped recess.

7. A battery low temperature performance detection device according to claim 3, characterized in that: An annular cover is provided on the outer side wall of the sleeve (3).

8. A battery low temperature performance detection device according to claim 2, characterized in that: The plurality of connecting plates (42) are arranged in an inclined manner.

9. A method for detecting low temperature performance of a battery, according to a device for detecting low temperature performance of a battery according to claims 1-8, characterized in that: The following steps are involved: S1. First, place the battery sample on the top of the base (5), and electrically connect the electrodes to the detection equipment; S2, cold air is input from the cold air delivery pipe (2) into the sleeve (3), and the cold air flows into the blocking mechanism (7) and accumulates; S3, after the cold air accumulates to a certain height, it flows to the bottom of the inner cavity of the box (1); S4, cold air completely submerges the battery sample at the bottom of the inner cavity of the box (1); S5. When the temperature reaches the detection requirement, the cold air supply in the cold air delivery pipe (2) is stopped; S6, starting the air pump (6), and conveying the cold air to the top wall of the box body (1) through the air pump (6) for circulation.

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