CN211979005U

CN211979005U - Compress tightly double-wire system heavy current probe of contact

Info

Publication number: CN211979005U
Application number: CN201922254082.3U
Authority: CN
Inventors: 冯臣相; 赵纪军
Original assignee: Vica New Energy Technology Nantong Co ltd
Current assignee: Vica New Energy Technology Nantong Co ltd
Priority date: 2019-12-16
Filing date: 2019-12-16
Publication date: 2020-11-20
Anticipated expiration: 2029-12-16

Abstract

The utility model discloses a compress tightly double-wire system heavy current probe of contact, including guide pin bushing, needle bar body, current test head, voltage probe and separation sleeve, the needle bar body slides and wears to locate inside the guide pin bushing, the current test head set up in the bottom of needle bar body, be equipped with the via hole that runs through its length direction in the needle bar body, the separation sleeve sets up in among the via hole, its inside slides and is provided with the voltage probe, current test head bottom is equipped with the slotted hole, a strip voltage test head through the slotted hole with voltage probe links to each other; the application provides a spacer sleeve has been added to the heavy current probe, adopts split type probe design, and voltage acquisition and current output separately keep apart, have solved and have had the electric current to pass through and produce the problem of extra voltage difference in the voltage acquisition line, have reduced the voltage acquisition error, have improved the degree of accuracy of probe reading.

Description

Compress tightly double-wire system heavy current probe of contact

Technical Field

The utility model belongs to the technical field of the battery test, concretely relates to compress tightly double-wire system heavy current probe of contact.

Background

With energy crisis and climate warming in the world, a brand new energy mode is urgently needed in the field of transportation, and the development speed of new energy electric automobiles is accelerated due to the green and environment-friendly lithium ion battery. The large-current test probe is an important detection tool in battery test, and in the process of charging and discharging the battery, the large-current test probe is required to complete current transmission and read parameters of current and voltage. Whether the contact between the large-current test probe and the battery is good or not is the key of whether the battery can complete the charging and discharging process and whether the read parameters are accurate or not.

Chinese patent CN109683000A discloses a high-current probe device, which comprises a probe fixing member, a current pin, a voltage pin, a spring and a nut assembly, wherein the probe fixing member is provided with an installation through hole for the lower end of the current pin to pass through; the current needle is of a cylindrical structure with an axial through hole, the upper end surface of the current needle is a tooth-shaped contact surface which can be contacted with a battery tab, and the lower end of the current needle penetrates through the mounting through hole of the probe fixing piece and then is in threaded connection with the nut assembly; the spring is sleeved outside the current pin, the upper end of the spring is propped against the tooth-shaped contact surface of the current pin, and the lower end of the spring is propped against the convex shoulder at the top of the probe fixing piece; the voltage pin is inserted into the axial through hole of the current pin, the upper end of the voltage pin is provided with at least one needle point structure extending upwards, and the lower end wiring terminal of the voltage pin and the lower end wiring terminal of the current pin are respectively and correspondingly connected with the power supply equipment through wires.

Including the technical scheme disclosed in the above patent, the current high-current probe has the following defects in the process of testing the lithium battery: 1. an integrated probe is adopted, and the probe excessively collects voltage while overcurrent, so that the collected voltage error is large; 2. the OT terminal connected with the current output point is generally fixed by screws, so that the efficiency is low; 3. the middle voltage collecting head is a cylindrical head, the middle-level pole of the lithium battery is provided with a threaded hole or a groove, the voltage collecting head cannot collect accurate voltage, and the compatibility of the product is small.

SUMMERY OF THE UTILITY MODEL

Therefore, the utility model provides a compress tightly double-wire system heavy current probe of contact aims at solving above-mentioned problem.

The technical scheme of the utility model as follows:

the utility model provides a compress tightly double-wire system heavy current probe, includes guide pin bushing, needle bar body, current test head, voltage probe and separation sleeve, the needle bar body slides and wears to locate inside the guide pin bushing, the current test head set up in the bottom of needle bar body, this internal via hole that runs through its length direction that is equipped with of needle bar, the separation sleeve is established among the via hole, and its inside slip is provided with voltage probe, current test head bottom also is equipped with the slotted hole, a strip voltage test head pass through the slotted hole with voltage probe links to each other.

In some embodiments, a first elastic piece is arranged between the guide sleeve and the current testing head, and a second elastic piece is arranged between the isolation sleeve and the current testing head.

In a preferred embodiment, the first elastic member and the second elastic member are both springs.

In some embodiments, the upper section of the needle bar body is externally threaded and connected with a fixing piece.

In a preferable scheme, the fixing piece comprises a first nut, a wave-shaped gasket and a second nut, internal threads are arranged inside the first nut and the second nut, and the internal threads are matched with the external threads.

In some embodiments, the top of the isolation sleeve is provided with a snap spring.

In some embodiments, the guide sleeve and the isolation sleeve are made of ceramic materials.

In some embodiments, the bottom surfaces of the current test head and the strip voltage test head are provided with trapezoidal flat teeth.

In some embodiments, the guide sleeve is provided with a positioning hole.

The utility model has the advantages that: compared with the prior art, the large-current probe provided by the application is additionally provided with the isolation sleeve, and the split-type probe design is adopted, so that voltage acquisition and current output are separated and isolated, the problem that extra voltage difference is generated due to the fact that current passes through a voltage acquisition line is solved, and voltage acquisition errors are reduced; the OT terminal connected with the current output point is fixed by the nut, so that the efficiency is higher; the voltage test head adopts the strip design, is applicable to more types of battery utmost point posts, has promoted the holistic universality of probe.

Drawings

Fig. 1 is a schematic perspective view of an embodiment of the present invention;

fig. 2 is a schematic bottom view of an embodiment of the present invention;

fig. 3 is a schematic front view of an embodiment of the present invention;

3 FIG. 3 4 3 is 3 a 3 cross 3- 3 sectional 3 view 3 taken 3 along 3 line 3 A 3- 3 A 3 of 3 FIG. 3 3 3; 3

Fig. 5 is a schematic side view of an embodiment of the present invention;

fig. 6 is a sectional view taken along line B-B in fig. 5.

In the figure: 1-guide sleeve, 2-needle rod body, 3-current test head, 31-slotted hole, 4-strip voltage test head, 5-current output wiring point, 6-voltage output wiring point, 7-voltage probe, 8-isolation sleeve, 91-first elastic element, 92-second elastic element, 101-first nut, 102-second nut, 103-wave gasket, 11-internal thread, 12-external thread, 13-snap spring, 14-trapezoidal flat tooth and 15-positioning hole.

Detailed Description

The invention will be described in further detail with reference to the following description of the drawings, it being understood that the described embodiments are merely individual embodiments of the invention, rather than all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it is to be understood that the terms "center", "lateral", "longitudinal", "front", "rear", "left", "right", "up", "down", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the scope of the invention.

As shown in fig. 1-6, a compact contact type double-wire system heavy current probe comprises a guide sleeve 1, a needle bar body 2, a current test head 3, a voltage probe 7 and a spacer sleeve 8, wherein the needle bar body 2 is slidably arranged inside the guide sleeve 1, the current test head 3 is arranged at the bottom end of the needle bar body 2, a through hole penetrating through the needle bar body in the length direction is arranged in the needle bar body 2, the spacer sleeve 8 is arranged in the through hole, the voltage probe 7 is slidably arranged inside the through hole, the surface of the voltage probe 7 is plated with gold, a slotted hole 31 is also arranged at the bottom of the current test head 3, and a strip-shaped voltage test head 4 is connected with the voltage probe 7 in a welding manner through the slotted hole. The bottom surface of the whole current testing head 3 is plated with gold, and the rest part is plated with nickel, so that the impedance is reduced, the resistance is smaller than 0.2m omega, and the reading accuracy of the large-current probe is greatly improved.

A first elastic piece 91 is arranged between the guide sleeve 1 and the current testing head 3, and a second elastic piece 92 is arranged between the isolation sleeve 8 and the current testing head 3. When the device is used, the voltage output wiring point 6 is welded with an upper voltage wire, the probe is integrally pressed downwards, the first elastic piece 91 and the second elastic piece 92 are respectively compressed, the current testing head 3 and the strip-shaped voltage testing head 4 are tightly combined with a pole of a lithium ion battery, and data are measured and read. Preferably, the first elastic member 91 and the second elastic member 92 are both springs.

The periphery of the upper section of the needle bar body 2 is provided with external threads 12 and is connected with a fixing piece.

The fixing piece comprises a first nut 101, a wave-shaped gasket 103 and a second nut 102, wherein internal threads 11 are arranged inside the first nut 101 and the second nut 102, and the internal threads 11 are matched with the external threads 12. The second nut 102 is disposed next to the guide sleeve 1, and a current line OT terminal (not shown) is sleeved on the upper section of the needle bar body 2 to connect with the current output connection point 5, and then the wave-shaped gasket 103 and the first nut 101 are sleeved and screwed. Adopt the nut to fix electric current line OT terminal, efficiency is higher, convenient to detach's effect when can playing the installation of being convenient for and equipment replacement when using.

The top of the isolation sleeve 8 is provided with a clamp spring 13 for preventing the voltage probe 7 in the isolation sleeve 8 from moving axially, and the stability of the probe is improved.

The guide sleeve 1 and the isolation sleeve 8 are made of ceramic materials. The ceramic material has the characteristics of insulation and high temperature resistance, and the insulation property of the part can avoid interference on the test result; and the high temperature resistance ensures that the guide sleeve 1 and the isolation sleeve 8 are not easy to melt in the using process, ensures the safety factor of a large-current probe, and has longer service life under the working temperature condition of-30 to 300 ℃.

The bottom surfaces of the current test head 3 and the strip voltage test head 4 are respectively provided with a trapezoidal flat tooth 14, the trapezoidal flat teeth 14 have the effect similar to a drill bit, an oxide layer on the surface of the battery can be better punctured, the test head is more extended into the battery through end face contact, and the detected data are more accurate.

The guide sleeve 1 is provided with a positioning hole 15, and the guide sleeve 1 can be fixed on a test bench through the positioning hole 15, wherein the test bench is a platform for fixing the guide sleeve 1 in order to test the current and voltage data of the battery.

In summary, the isolation sleeve 8 is added into the high-current probe provided by the application, and the split probe design is adopted, so that voltage acquisition and current output are separated and isolated, the problem of extra voltage difference caused by the passing of current in a voltage acquisition line is solved, and the voltage acquisition error is reduced; the OT terminal connected with the current output point is fixed by the nut, so that the efficiency is higher; the voltage testing head 4 is designed in a strip shape, is suitable for more types of battery poles, and improves the overall universality of the probe; meanwhile, the device has the advantages of small impedance, high safety factor and long service life.

It should be noted that, for those skilled in the art, similar changes and modifications can be made without departing from the inventive concept, and these should be construed as being within the scope of the present invention.

Claims

1. The utility model provides a compress tightly double-wire system heavy current probe of contact, includes guide pin bushing (1), needle bar body (2), electric current test head (3), voltage probe (7) and spacer sleeve (8), its characterized in that: the needle bar body (2) is arranged inside the guide sleeve (1) in a penetrating mode in a sliding mode, the current testing head (3) is arranged at the bottom end of the needle bar body (2), a through hole penetrating through the needle bar body in the length direction is formed in the needle bar body (2), the isolating sleeve (8) is arranged in the through hole, the voltage probe (7) is arranged in the through hole in a sliding mode, a slotted hole (31) is formed in the bottom of the current testing head (3), and the strip-shaped voltage testing head (4) is connected with the voltage probe (7) through the slotted hole (31).

2. A high current probe according to claim 1, wherein: a first elastic piece (91) is arranged between the guide sleeve (1) and the current testing head (3), and a second elastic piece (92) is arranged between the isolation sleeve (8) and the current testing head (3).

3. A high current probe according to claim 2, wherein: the first elastic member (91) and the second elastic member (92) are both springs.

4. A high current probe according to claim 1, wherein: the periphery of the upper section of the needle rod body (2) is provided with external threads (12) and is connected with a fixing piece.

5. The high current probe of claim 4, wherein: the fixing piece comprises a first nut (101), a wave-shaped gasket (103) and a second nut (102), internal threads (11) are arranged inside the first nut (101) and the second nut (102), and the internal threads (11) are matched with the external threads (12).

6. A high current probe according to claim 1, wherein: and a clamp spring (13) is arranged at the top of the isolation sleeve (8).

7. The high current probe of claim 6, wherein: the guide sleeve (1) and the isolation sleeve (8) are made of ceramic materials.

8. A high current probe according to claim 1, wherein: the bottom surfaces of the current test head (3) and the strip voltage test head (4) are respectively provided with a trapezoidal flat tooth (14).

9. A high current probe according to any of claims 1 to 8, wherein: and a positioning hole (15) is formed in the guide sleeve (1).