Terminal fixing tool for preventing terminal burning during large-current detection of lead-acid battery terminal

Abstract

The utility model relates to a terminal fixing tool for preventing a lead-acid battery terminal from being burnt during large-current detection. The terminal fixing tool comprises a tool main body and a hoop for fixing the tool main body and the battery terminal, the tool body is a stepped cylinder composed of a small cylinder and a large cylinder located at the lower end of the small cylinder, the small cylinder at the upper end is connected with an external test line, a first protruding ring protrudes out of the upper middle portion of the large cylinder at the lower end, and the upper end face of the first protruding ring is flush with the upper end face of the large cylinder. The inner ring of the upper end face of the first convex ring is concave inwards, the inner ring and the outer portion of the large cylinder define an annular groove with an opening in the upper end, and cooling liquid is contained in the annular groove. A terminal groove matched with a battery terminal is concavely formed in the middle of the lower end of the tool main body; and the battery terminal penetrates into the terminal groove at the lower end part of the tool main body and then is fastened by the hoop arranged at the lower end part of the large cylinder. During large current detection, heat is conducted to water in time, and the heat is dissipated through the water, so that the phenomenon of terminal burning in the large current detection process of the battery is prevented.

Description

Technical Field

[0001] The utility model belongs to the field of lead-acid battery detection, and particularly relates to a terminal fixing tooling for preventing the terminals of lead-acid batteries from being burned during high-current detection. Background Art

[0002] During the performance detection of lead-acid batteries, high-current detection is involved. During high-current detection, from Q = I 2 RT, it can be known that when the time T and resistance R remain unchanged, if the current I passing through the lead pole column is too large in a short time, the heat Q dissipated by the terminal is large. The melting point of lead is 327.43°C, which causes the lead terminal to overheat and easily results in the phenomenon of terminal burning. During high-current detection, the test current is relatively fixed and large, and the resistance and time are fixed. Only by dissipating heat can it be ensured that the heat generated during the detection process cannot melt the lead parts. The high-current discharge terminal fixture disclosed in the prior art includes a left clamp body and a right clamp body. One end of the left clamp body and the right clamp body is hinged, and the other end is processed with corresponding through holes 1. A screw rod 2 passes through the corresponding through holes on the left clamp body and the right clamp body in sequence, and then a nut is installed to connect and fix the left clamp body and the right clamp body; the opposite surfaces of the left clamp body and the right clamp body are concave with symmetric semi-circular concave holes; there are cooling water channels inside the left clamp body and the right clamp body. The cooling water channels include a water inlet end water channel, a water outlet end water channel, and an arc-shaped water channel located outside the semi-circular concave hole. Both ends of the arc-shaped water channel extend outward with transition water channels. The end of one transition water channel is perpendicular and intersects with the water inlet end water channel, and the end of the other transition water channel is perpendicular and intersects with the water outlet end water channel. This fixture selects water to absorb the generated heat to prevent terminal damage. However, this terminal is clamped in the middle of the clamping plate, which is relatively troublesome to fix, and the power-on efficiency is not high, generating more heat. Moreover, a water channel is provided in the middle of the clamp for heat dissipation, the tooling volume is small, and it is difficult to manufacture the water channel. Summary of the Invention

[0003] The purpose of the utility model is to solve the above-mentioned deficiencies of the prior art, and thus provide a terminal fixing tooling for preventing the terminals of lead-acid batteries from being burned during high-current detection, which can timely conduct heat to water during high-current detection and dissipate heat through water to prevent the phenomenon of terminal burning during the high-current detection of the battery.

[0004] To achieve the above purpose, the technical solution of the utility model is: a terminal fixing tooling for preventing the terminals of lead-acid batteries from being burned during high-current detection, including a tooling main body and a clamp for fixing the tooling main body and the battery terminals;

[0005] The tooling body is a stepped cylinder composed of a small cylinder and a large cylinder located at the lower end of the small cylinder. The small cylinder at the upper end is connected to the external test line. In the middle and upper part of the large cylinder at the lower end, there is a first convex ring protruding. The upper end face of the first convex ring is flush with the upper end face of the large cylinder. The inner circle of the upper end face of the first convex ring is concave, and together with the outside of the large cylinder, it encloses an annular groove with an upper opening. The annular groove is filled with coolant;

[0006] In the middle of the lower end of the tooling body, there is a concave terminal groove that matches the battery terminal;

[0007] After the battery terminal penetrates into the terminal groove inside the lower end of the tooling body, it is fastened by a clamp installed at the lower end of the large cylinder.

[0008] The lower end face of the annular groove does not exceed half of the height of the terminal groove.

[0009] A cover plate is installed on the first convex ring.

[0010] The lower end of the cover plate protrudes with a second convex ring that matches the annular groove.

[0011] Corresponding air-permeable through holes are distributed in a ring at the relative position of the second convex ring and the cover plate.

[0012] The utility model is fixed by a sleeve and a fastening ring, with simple operation, water cooling, and no water circuit design.

[0013] The tooling of the utility model is simple to manufacture and has a relatively low manufacturing cost. When in use, there is no need for a water circuit, the usage conditions are few, and the usage range is wide.

[0014] While ensuring that the terminal is not burned out, the utility model has no circulating water circuit, which can save design costs and usage costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is an assembly drawing of the tooling of the utility model and the battery upper cover during lead-acid battery testing;

[0016] Figure 2 It is a schematic diagram of the tooling body of the utility model;

[0017] Figure 3 It is a schematic diagram of the tooling locking device of the utility model;

[0018] Figure 4 It is a schematic diagram of the tooling cover plate of the utility model;

[0019] In the figure: 1. Battery terminal, 2. Clamp, 3. First convex ring, 4. Annular groove, 5. Splash-proof cover plate, 51. Second convex ring, 52. Air-permeable through hole. DETAILED DESCRIPTION OF THE INVENTION

[0020] As Figure 1 、Figure 2 , Figure 3 As shown, in the middle of the lower end of the tooling main body, there is a concave terminal groove that matches the battery terminal 1. The tooling main body is a stepped cylinder composed of a small cylinder and a large cylinder at the lower end of the small cylinder. In the middle and upper part of the large cylinder at the lower end, there is a first convex ring 3. The upper end surface of the first convex ring 3 is flush with the upper end surface of the large cylinder. Inside the inner circle of the upper end surface of the first convex ring 3, there is a concave, which together with the outside of the large cylinder encloses an annular groove 4 with an upper opening. The annular groove 4 is filled with coolant. The lower end surface of the annular groove 4 does not exceed half of the height of the terminal groove, so that the coolant covers as much of the outer circumference of the terminal as possible, improving the heat dissipation effect. The small cylinder at the upper end is welded to the external test wire 6. The tooling main body is made of copper with good electrical conductivity. After the battery terminal 1 passes through the terminal groove inside the lower end of the tooling main body, it is fastened by the clamp 2 installed at the lower end of the large cylinder.

[0021] As Figure 1 , Figure 2 , Figure 4 As shown, a cover plate 5 is installed on the first convex ring 3. The diameter of the cover plate 5 is larger than the outer diameter of the first convex ring 3. At the lower end of the cover plate 5, there is a second convex ring 51 that matches the annular groove 4. Corresponding ventilation through holes 52 are distributed in a ring at the relative position of the second convex ring 51 and the cover plate 5.

[0022] During the large current detection of the battery, the lower end of the tooling main body is sleeved with the battery terminal 1, and then the tooling main body and the battery terminal are locked by the clamp No. 2 to ensure that the energized tooling main body is in close contact with the terminal. Cooled water is filled in the annular groove 4, and then the cover plate 5 is covered. When the experimental battery undergoes large current detection, heat is generated. The heat is conducted through the tooling main body to the liquid in the annular groove 4. The liquid in the annular groove 4 absorbs the heat, protecting the terminal and the tooling from overheating and preventing the terminal from being burned out.

Claims

1. A terminal fixing tool for preventing the terminal from burning during high current detection of lead-acid battery terminals, characterized in that: It comprises a tool body and a clamp (2) for fixing the tool body and a battery terminal (1); The tooling body is a stepped cylinder consisting of a small cylinder and a large cylinder located at the lower end of the small cylinder. The small cylinder at the upper end is connected to an external test line. A convex ring (3) is protruded from the upper middle part of the large cylinder at the lower end. The upper end surface of the convex ring (3) is flush with the upper end surface of the large cylinder. The inner circle of the upper end surface of the convex ring (3) is concave and encloses an annular groove (4) with an upper end opening together with the outer part of the large cylinder. The annular groove (4) is filled with cooling liquid. A terminal groove matching the battery terminal (1) is formed in the middle of the lower end of the tool body; After the battery terminal (1) is inserted into the terminal groove at the lower end of the tool body, it is fastened by a clamp (2) installed at the lower end of the large cylinder.

2. A terminal fixing tool for preventing the terminal from burning during high current detection of lead-acid battery terminals according to claim 1, characterized in that: The lower end surface of the annular groove (4) does not exceed half the height of the terminal groove.

3. The terminal fixing tool for preventing the terminal from burning during high current detection of lead-acid battery terminals according to claim 1, characterized in that: A cover plate (5) is mounted on the convex ring (3).

4. A terminal fixing tool for preventing the terminal from burning during high current detection of lead-acid battery terminals according to claim 3, characterized in that: A second protruding ring (51) is protruded from the lower end of the cover plate (5) and is matched with the annular groove (4).

5. A terminal fixing tool for preventing the terminal from burning during high current detection of lead-acid battery terminals according to claim 4, characterized in that: Corresponding ventilation holes (52) are arranged around the relative positions of the second convex ring (51) and the cover plate (5).

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