A low temperature rise battery cell test probe

Abstract

The present invention provides a low temperature rise battery cell test probe in the technical field of battery cell test equipment, comprising: a lifting base plate, provided with a probe mounting hole and two lifting holes; a guide compression assembly, mounted on the upper end of the lifting base plate through the lifting hole; an adapter assembly; a metal washer; a corrugated elastic washer; a nut; a probe body, the top of which passes through the probe mounting hole, the adapter assembly, the metal washer and the corrugated elastic washer in sequence and is threadedly connected with the nut; an insulating high thermal conductivity sleeve, sleeved on the probe body; a metal thermal conductive cylinder, sleeved on the insulating high thermal conductive sleeve; two insulating washers, sleeved on the probe body, respectively located at the upper and lower ends of the metal thermal conductive cylinder. The advantages of the present invention are: greatly improving the heat dissipation performance of the probe.

Description

Technical Field

[0001] The invention relates to the technical field of battery cell testing equipment, and in particular to a low temperature rise battery cell testing probe. Background Art

[0002] With the vigorous development of new energy vehicles, the production scale of lithium-ion power batteries has increased dramatically. Lithium-ion power batteries are composed of several battery cells. Large-capacity battery cells help to form PACK modules (lithium-ion power batteries) with a lower number, thereby reducing costs and causing the volume and capacity of single battery cells to continuously break through the upper limit.

[0003] After the battery cell is produced, it needs to undergo a DCR test. As the battery cell capacity continues to increase, the current for the DCR test is also increasing, and is currently as high as 400 A. During the DCR test, since the probe end is not in complete contact with the battery cell pole, when the battery cell is charged and discharged at a current of 400 A for 1 minute, the temperature of the probe will rise rapidly, which will directly affect the test accuracy, so the probe needs to be cooled.

[0004] However, the traditional probe adopts a coaxial design, that is, the probe body and the compression spring adopt a coaxial design, and can only rely on air cooling for convection heat dissipation, which cannot effectively suppress the probe temperature rise under the requirements of high current testing, and the heat dissipation energy consumption of air cooling is high.

[0005] Therefore, how to provide a low-temperature rise battery cell test probe to improve the heat dissipation performance of the probe has become a technical problem that needs to be solved urgently. Summary of the invention

[0006] The technical problem to be solved by the present invention is to provide a low temperature rise battery cell test probe to improve the heat dissipation performance of the probe.

[0007] The present invention is implemented as follows: a low temperature rise battery cell test probe, comprising:

[0008] A lifting base plate having a probe mounting hole and two lifting holes;

[0009] a guide compression assembly, mounted on the upper end of the lifting base plate through the lifting hole;

[0010] a transfer assembly;

[0011] a metal washer;

[0012] a wave spring washer;

[0013] a nut;

[0014] A probe body, the top end of which passes through the probe mounting hole, the adapter assembly, the metal washer and the corrugated elastic washer in sequence and is threadedly connected to the nut;

[0015] An insulating high thermal conductivity sleeve, sleeved on the probe body;

[0016] A metal heat-conducting cylinder, sleeved on the insulating high-heat-conducting sleeve;

[0017] Two insulating washers are sleeved on the probe body and are respectively located at the upper and lower ends of the metal heat-conducting cylinder.

[0018] Further, the guide compression assembly comprises:

[0019] Two linear bearings are respectively arranged in one of the lifting holes;

[0020] Two guide shafts are respectively arranged in one of the linear bearings;

[0021] An outer connecting plate, the bottom end of which is connected to the top ends of the two guide shafts;

[0022] Two compression springs are respectively sleeved on one of the guide shafts.

[0023] Furthermore, the adapter assembly includes:

[0024] a metal cord;

[0025] A transfer terminal connected to the top end of the metal flexible wire;

[0026] A power line terminal is sleeved on the probe body and connected to the bottom end of the metal soft wire.

[0027] The advantages of the present invention are:

[0028] A probe mounting hole and two lifting holes are arranged on the lifting base plate, the probe body is installed through the probe mounting hole, and the guide compression assembly is installed through the lifting hole, so that the probe body and the guide compression assembly are in a non-coaxial position, and an insulating high thermal conductivity sleeve is sleeved on the probe body, and a metal thermal conductive cylinder is sleeved on the insulating high thermal conductive sleeve, and insulating washers are respectively arranged at the upper and lower ends of the metal thermal conductive cylinder, so that the heat generated by the probe body is rapidly dissipated outward through the insulating high thermal conductive sleeve and the metal thermal conductive cylinder in turn, and the insulation between the metal thermal conductive cylinder and the probe body is maintained, thereby avoiding the metal thermal conductive cylinder from interfering with the test. Compared with traditional air-cooled heat dissipation, the heat dissipation performance of the probe is greatly improved, and the heat dissipation energy consumption is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The present invention will be further described below in conjunction with embodiments with reference to the accompanying drawings.

[0030] Figure 1 It is a structural schematic diagram of a low temperature rise battery cell test probe of the present invention.

[0031] Figure 2 It is a side view of a low temperature rise battery cell test probe of the present invention.

[0032] Figure 3 It is a cross-sectional view of a low temperature rise battery cell test probe of the present invention.

[0033] Marking Description:

[0034] 100-A low-temperature rise battery cell test probe, 1-lifting base plate, 2-guide compression assembly, 3-adapter assembly, 4-metal gasket, 5-wave elastic gasket, 6-nut, 7-probe body, 8-insulating high thermal conductivity sleeve, 9-metal thermal conductive cylinder, 10-insulating gasket, 11-probe mounting hole, 12-lifting hole, 21-linear bearing, 22-guide shaft, 23-external connecting plate, 24-compression spring, 31-metal soft wire, 32-transfer terminal, 33-power line terminal. DETAILED DESCRIPTION

[0035] The embodiment of the present invention provides a low-temperature rise cell test probe 100, which solves the technical problem in the prior art that the probe adopts a coaxial design and can only rely on air cooling for heat dissipation, and has a limited heat dissipation effect, thereby achieving a technical effect of greatly improving the heat dissipation performance of the probe.

[0036] The technical solution in the embodiment of the present invention is to solve the above problems. The overall idea is as follows: the probe body 7 and the guide compression assembly 2 are in a non-coaxial position, and an insulating high thermal conductivity sleeve 8 is sleeved on the probe body 7, a metal thermal conductive cylinder 9 is sleeved on the insulating high thermal conductive sleeve 8, and insulating washers 10 are respectively provided at the upper and lower ends of the metal thermal conductive cylinder 9, so that the heat generated by the probe body 7 is quickly dissipated outward through the insulating high thermal conductive sleeve 8 and the metal thermal conductive cylinder 9 in turn, so as to improve the heat dissipation performance of the probe.

[0037] In order to better understand the above technical solution, the above technical solution will be described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0038] Please refer to Figures 1 to 3 As shown, a preferred embodiment of a low temperature rise battery cell test probe 100 of the present invention includes:

[0039] A lifting base plate 1, provided with a probe mounting hole 11 and two lifting holes 12; the lifting base plate 1 is used to carry a low temperature rise battery cell test probe 100;

[0040] A guide compression assembly 2, mounted on the upper end of the lifting base plate 1 through the lifting hole 12, for compressing the low temperature rise battery cell test probe 100 so that the probe body 7 is pressed onto the pole of the battery cell (not shown);

[0041] A switching component 3, used for connecting to a power source;

[0042] a metal washer 4;

[0043] A corrugated elastic washer 5, used to provide elasticity for the nut 6 to lock the probe body 7;

[0044] A nut 6, used to lock the probe body 7;

[0045] A probe body 7, the top of which passes through the probe mounting hole 11, the adapter assembly 3, the metal washer 4 and the corrugated elastic washer 5 in sequence and is threadedly connected to the nut 6; the top of the probe body 7 is provided with a threaded section (not shown), and the bottom is provided with a boss (not shown), which is threadedly connected to the nut 6 through the threaded section, and the insulating washer 10 is clamped by the boss;

[0046] An insulating high thermal conductivity sleeve 8, which is sleeved on the probe body 7, is used for rapid heat dissipation of the probe body 7 and isolates the probe body 7 from the metal thermal conductive cylinder 9;

[0047] A metal heat-conducting cylinder 9 is sleeved on the insulating high-heat-conducting sleeve 8 and is used for rapid heat dissipation of the probe body 7. In specific implementation, it can be designed as a heat dissipation fin, or cooling gas or cooling water can be introduced to accurately control the working temperature of the probe;

[0048] Two insulating washers 10 are sleeved on the probe body 7 and are respectively located at the upper and lower ends of the metal heat-conducting cylinder 9 to isolate the metal heat-conducting cylinder 9 .

[0049] The guide compression assembly 2 comprises:

[0050] Two linear bearings 21 are respectively disposed in one of the lifting holes 12;

[0051] Two guide shafts 22 are respectively disposed in one of the linear bearings 21 and are lifted and lowered by the linear bearings 21;

[0052] An outer connecting plate 23, the bottom end of which is connected to the top ends of the two guide shafts 22;

[0053] Two compression springs 24 are respectively sleeved on one of the guide shafts 22 and are used to convert the pressure at the end into the compression amount of the compression spring 24 when the probe body 7 is tested.

[0054] The adapter component 3 includes:

[0055] a metal flexible wire 31;

[0056] A transfer terminal 32 connected to the top end of the metal cord 31;

[0057] A power line terminal 33 is sleeved on the probe body 7 and connected to the bottom end of the metal soft wire 31 .

[0058] Working principle of the present invention:

[0059] The external connection plate 23 is locked with an external power shaft (not shown), and the low temperature rise cell test probe 100 is driven downward by the external power shaft to make the probe body 7 contact the pole surface of the cell until the compression amount of the compression spring 24 reaches a preset value, so as to achieve effective contact between the probe body 7 and the pole surface. The test current is connected through the adapter assembly 3 for testing, and the heat generated during the test is rapidly dissipated outward through the insulating high thermal conductivity sleeve 8 and the metal thermal conductive cylinder 9 in turn.

[0060] In summary, the advantages of the present invention are:

[0061] A probe mounting hole and two lifting holes are arranged on the lifting base plate, the probe body is installed through the probe mounting hole, and the guide compression assembly is installed through the lifting hole, so that the probe body and the guide compression assembly are in a non-coaxial position, and an insulating high thermal conductivity sleeve is sleeved on the probe body, and a metal thermal conductive cylinder is sleeved on the insulating high thermal conductive sleeve, and insulating washers are respectively arranged at the upper and lower ends of the metal thermal conductive cylinder, so that the heat generated by the probe body is rapidly dissipated outward through the insulating high thermal conductive sleeve and the metal thermal conductive cylinder in turn, and the insulation between the metal thermal conductive cylinder and the probe body is maintained, thereby avoiding the metal thermal conductive cylinder from interfering with the test. Compared with traditional air-cooled heat dissipation, the heat dissipation performance of the probe is greatly improved, and the heat dissipation energy consumption is reduced.

[0062] Although the specific implementation modes of the present invention are described above, those skilled in the art should understand that the specific implementation modes described are only illustrative and are not intended to limit the scope of the present invention. Equivalent modifications and changes made by those skilled in the art in accordance with the spirit of the present invention should be included in the scope of protection of the claims of the present invention.

Claims

1. A low temperature rise battery cell test probe, Features: include: A lifting base plate having a probe mounting hole and two lifting holes; a guide compression assembly, mounted on the upper end of the lifting base plate through the lifting hole; a transfer assembly; a metal washer; a wave spring washer; a nut; A probe body, the top end of which passes through the probe mounting hole, the adapter assembly, the metal washer and the corrugated elastic washer in sequence and is threadedly connected to the nut; An insulating high thermal conductivity sleeve, sleeved on the probe body; A metal heat-conducting cylinder, sleeved on the insulating high-heat-conducting sleeve; Two insulating washers are sleeved on the probe body and are respectively located at the upper and lower ends of the metal heat-conducting cylinder; The guide compression assembly comprises: Two linear bearings are respectively arranged in one of the lifting holes; Two guide shafts are respectively arranged in one of the linear bearings; An outer connecting plate, the bottom end of which is connected to the top ends of the two guide shafts; Two compression springs are respectively sleeved on one of the guide shafts; The switching assembly comprises: a metal cord; A transfer terminal connected to the top end of the metal flexible wire; A power line terminal is sleeved on the probe body and connected to the bottom end of the metal soft wire.

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