A single cell voltage test tool

Abstract

The utility model discloses a single cell withstand voltage test tool, comprising a tool bottom plate and four groups of electrical measuring mechanisms, wherein two groups of vertical plates are vertically connected to the tool bottom plate, the two groups of vertical plates are respectively a first vertical plate and a second vertical plate, and are parallel to each other, the tool bottom plate is connected to a top plate via a support rod, the top plate and the tool bottom plate are parallel to each other, and a propulsion mechanism is provided on both the first vertical plate and the top plate; the four groups of electrical measuring mechanisms can fully cover the four surfaces of the battery at the same time, and the battery position can be located during the test process, which is more comprehensive and reliable than previous detection methods, is simple to operate, and has a good market promotion prospect.

Description

Technical Field

[0001] The utility model relates to the technical field of single cell insulation withstand voltage test, in particular to a single cell withstand voltage test tool. Background Art

[0002] With the continuous development of pure electric vehicles, the evaluation of lithium-ion battery performance has become more and more comprehensive and strict. Among them, the withstand voltage test is an indispensable test in many performance evaluations and is one of the must-check items in battery production. In the past, most tests were point-to-point tests with limited test locations, making it difficult to comprehensively evaluate the stability of the product. For single cells with exhaust valves at the bottom and positive and negative poles at both ends, this tooling is designed to be surface-contact, and covers the four sides of the battery for withstand voltage testing at the same time. It is more comprehensive and reliable than previous testing methods, simple to operate, and has good market promotion prospects. Utility Model Content

[0003] In order to solve the technical problems existing in the background technology, the utility model provides a single cell voltage withstand test tool.

[0004] The utility model provides a single cell withstand voltage test tool, comprising a tool bottom plate and four groups of electrical measuring mechanisms, wherein the special single cell is placed on the tool bottom plate, and the four groups of electrical measuring mechanisms are respectively located on the top surface, the bottom surface and two opposite side surfaces of the single cell, so as to perform withstand voltage testing while clamping and positioning the single cell.

[0005] Two groups of vertical plates are vertically connected to the tooling bottom plate, the two groups of vertical plates are respectively the first vertical plate and the second vertical plate, and are parallel to each other; a support rod is vertically connected to the tooling bottom plate, the support rod is connected to a top plate, the top plate and the tooling bottom plate are parallel to each other, and a propulsion mechanism is provided on both the first vertical plate and the top plate;

[0006] The four groups of electrical measuring mechanisms are respectively a first electrical measuring mechanism, a second electrical measuring mechanism, a third electrical measuring mechanism and a fourth electrical measuring mechanism;

[0007] The first electrical measuring mechanism is installed on the tooling bottom plate and is located between the two sets of vertical plates; the second electrical measuring mechanism is installed on the propulsion mechanism on the top plate, the first electrical measuring mechanism and the second electrical measuring mechanism are directly opposite in the vertical direction, and the propulsion mechanism on the top plate is used to drive the second electrical measuring mechanism to move in the vertical direction;

[0008] The third electrical measuring mechanism is installed on the propulsion mechanism of the first vertical plate, and the fourth electrical measuring mechanism is installed on the second vertical plate. The third electrical measuring mechanism and the fourth electrical measuring mechanism are opposite to each other in the horizontal direction, and the propulsion mechanism on the first vertical plate is used to drive the third electrical measuring mechanism to move in the horizontal direction.

[0009] Preferably, the electrical measurement mechanism comprises an aluminum plate, on which an insulating gasket, a copper electrode and a conductive sponge are sequentially mounted.

[0010] Preferably, the propulsion mechanism includes a screw rod, a handwheel, a push plate and multiple groups of guide rods, the guide rods are slidably connected to the mounting part, the top end of each group of guide rods is connected to the push plate, the push plate is used to install the electrical measuring mechanism, the middle part of the screw rod is threadedly connected to the mounting part, one end of the screw rod is rotatably connected to the push plate, and the other end is connected to the handwheel, and rotating the handwheel can control the movement of the push plate.

[0011] Preferably, two groups of trapezoidal reinforcing plates are installed on the back sides of the two groups of vertical plates.

[0012] Preferably, the tooling base plate is made of 6061 aluminum alloy, which has good formability and weldability and medium strength.

[0013] Preferably, the copper electrodes are designed with threaded holes to facilitate connection with a withstand voltage test instrument.

[0014] Preferably, the surface resistivity of the conductive sponge is in the range of 10∧3 to 10∧6Ω / sq.

[0015] Preferably, a plurality of handles are installed on the tooling bottom plate.

[0016] In the present invention, a single cell pressure test fixture is proposed. The present invention fixes the battery through the bottom plate and the left vertical plate, and fixes the battery through the hand wheels on the top and right sides, so that the four sides of the battery are in good contact with the conductive sponge. The bottom is designed as a two-stage structure to avoid the explosion-proof valve of the battery, which can improve the accuracy of the test. The surface contact design greatly improves the reliability of product testing. In addition, the test fixture has a simple structure, low cost, can be used repeatedly, is easy to operate, and has good promotion prospects. The design of this fixture is a surface contact method, which covers the four sides of the battery for pressure resistance testing at the same time. It is more comprehensive and reliable than previous testing methods, simple to operate, and has good market promotion prospects.

[0017] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the structure of the utility model;

[0019] Figure 2 It is the front view of the utility model;

[0020] Figure 3 It is a top view of the utility model.

[0021] Explanation of the numbers in the figure: 1. tooling base plate; 2. vertical plate; 3. support rod; 4. top plate; 5. propulsion mechanism; 501. screw rod; 502. hand wheel; 503. push plate; 504. guide rod; 6. electrical measuring mechanism; 601. insulating gasket; 602. copper electrode; 603. conductive sponge; 6a. first electrical measuring mechanism; 6b. second electrical measuring mechanism; 6c. third electrical measuring mechanism; 6d. fourth electrical measuring mechanism; 7. handle. DETAILED DESCRIPTION

[0022] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar symbols throughout represent the same or similar elements or elements with the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0023] like Figure 1-Figure 3 The single cell pressure test fixture shown is used to test the single cell for special square batteries with exhaust valves at the bottom and positive and negative poles at both ends, including a fixture base plate 1 and four sets of electrical measuring mechanisms 6. The special single cell is placed on the fixture base plate 1, and the four sets of electrical measuring mechanisms are respectively located on the top surface, bottom surface and two opposite side surfaces of the single cell, so as to perform pressure test while clamping and positioning the single cell.

[0024] Two groups of vertical plates 2 are vertically connected to the tooling bottom plate 1, and the two groups of vertical plates 2 are respectively the first vertical plate and the second vertical plate, and are parallel to each other. A support rod 3 is vertically connected to the tooling bottom plate 1, and a top plate 4 is connected to the support rod 3. The top plate 4 is parallel to the tooling bottom plate 1, and a propulsion mechanism 5 is provided on both the first vertical plate and the top plate 4;

[0025] The four groups of electrical measuring mechanisms 6 are respectively a first electrical measuring mechanism 6a, a second electrical measuring mechanism 6b, a third electrical measuring mechanism 6c and a fourth electrical measuring mechanism 6d;

[0026] The first electrical measuring mechanism 6a is installed on the tooling bottom plate 1 and is located between the two sets of vertical plates 2; the second electrical measuring mechanism 6b is installed on the propulsion mechanism 5 on the top plate 4, the first electrical measuring mechanism 6a and the second electrical measuring mechanism 6b are directly opposite in the vertical direction, and the propulsion mechanism 5 on the top plate 4 is used to drive the second electrical measuring mechanism 6b to move in the vertical direction;

[0027] The third electrical measuring mechanism 6c is installed on the propulsion mechanism 5 of the first vertical plate, and the fourth electrical measuring mechanism 6d is installed on the second vertical plate. The third electrical measuring mechanism 6c and the fourth electrical measuring mechanism 6d are directly opposite in the horizontal direction, and the propulsion mechanism 5 on the first vertical plate is used to drive the third electrical measuring mechanism 6c to move in the horizontal direction;

[0028] Due to the particularity of the sample to be tested, the bottom component is divided into two equal parts. There is no insulating gasket 601, copper electrode 602, and conductive sponge 603 in the middle and at the explosion-proof valve position of the battery to be tested.

[0029] Preferably, the electrical measuring mechanism 6 includes an aluminum plate, on which an insulating gasket 601, a copper electrode 602 and a conductive sponge 603 are sequentially installed. The four groups of insulating gaskets 601 mainly prevent the battery to be tested from contacting the tooling and affecting the test results. Compared with general conductive rubber, the conductive sponge 603 has a good fitting effect, can comprehensively evaluate the battery's voltage resistance performance, and will not damage the insulating layer on the battery surface. It can be cut according to the shape of the sample to match the test requirements of multiple samples. The insulating gasket 601 and the copper electrode 602 are connected by a through screw to ensure good connection strength. The conductive sponge 603 is firmly bonded to the copper electrode 602 with conductive glue and has good contact performance.

[0030] Preferably, the propulsion mechanism 5 includes a screw rod 501, a handwheel 502, a push plate 503 and multiple groups of guide rods 504, the guide rods 504 are slidably connected to the mounting portion, the top end of each group of guide rods 504 is connected to the push plate 503, the push plate 503 is used to install the electrical measuring mechanism 6, the middle part of the screw rod 501 is threadedly connected to the mounting portion, one end of which is rotatably connected to the push plate 503, and the other end is connected to the handwheel 502, and rotating the handwheel 502 can control the movement of the push plate 503.

[0031] Place the battery at the center of the four conductive sponges 603, tighten the battery with the right hand wheel 502, and tighten the other two sides of the battery with the top hand wheel 502, so as to meet the voltage withstand test requirements of measuring the four sides of the battery at the same time.

[0032] Preferably, two groups of trapezoidal reinforcing plates are installed on the back side of the two groups of vertical plates 2, which can locate the battery position during the test. The left reinforcing plate is respectively provided with a vertical plate 2, an insulating gasket 601, a copper electrode 602 and a conductive sponge 603, which are used to fit the large surface of the battery tightly.

[0033] Preferably, the tooling base plate 1 is made of 6061 aluminum alloy, which has good formability and weldability and medium strength.

[0034] Preferably, the copper electrodes 602 are designed with threaded holes to facilitate connection with a withstand voltage test instrument.

[0035] Preferably, the surface resistivity of the conductive sponge 603 is in the range of 10∧3 to 10∧6Ω / sq.

[0036] Preferably, a plurality of handles 7 are installed on the tooling base plate 1, the base plate is used to support all components of the tooling, and the handles 7 facilitate the movement of the tooling.

[0037] According to the tooling design, actual tests conducted showed that under the point-to-point withstand voltage of 3.0KV, the leakage current was between 2.5 and 5.5μA. When the surface contact method was adopted and the new tooling was used for testing, breakdown occurred (the insulation of the battery was unqualified), indicating that the point contact test was relatively one-sided, and the surface contact test was more reasonable, accurate and reliable.

[0038] It should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0039] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0040] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0041] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0042] 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 within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A single cell voltage test tool, characterized in that: It comprises a tooling base plate (1) and four groups of electrical measuring mechanisms (6), wherein the single cell is placed on the tooling base plate (1), and the four groups of electrical measuring mechanisms are respectively located on the top surface, the bottom surface and two opposite side surfaces of the single cell, and perform withstand voltage testing while clamping and positioning the single cell.

2. A single cell withstand voltage test tool according to claim 1, characterized in that: The tooling bottom plate (1) is vertically connected to two groups of upright plates (2), the two groups of upright plates (2) are respectively a first upright plate and a second upright plate, and are parallel to each other; the tooling bottom plate (1) is connected to a top plate (4) via a support rod (3), the top plate (4) and the tooling bottom plate (1) are parallel to each other, and a propulsion mechanism (5) is provided on both the first upright plate and the top plate (4); The four groups of electrical measuring mechanisms (6) are respectively a first electrical measuring mechanism (6a), a second electrical measuring mechanism (6b), a third electrical measuring mechanism (6c) and a fourth electrical measuring mechanism (6d); The first electrical measuring mechanism (6a) is installed on the tooling bottom plate (1) and is located between the two sets of vertical plates (2); the second electrical measuring mechanism (6b) is installed on the propulsion mechanism (5) on the top plate (4); the first electrical measuring mechanism (6a) and the second electrical measuring mechanism (6b) are directly opposite in the vertical direction, and the propulsion mechanism (5) on the top plate (4) is used to drive the second electrical measuring mechanism (6b) to move in the vertical direction; The third electrical measuring mechanism (6c) is installed on the propulsion mechanism (5) of the first vertical plate, and the fourth electrical measuring mechanism (6d) is installed on the second vertical plate. The third electrical measuring mechanism (6c) and the fourth electrical measuring mechanism (6d) are directly opposite to each other in the horizontal direction, and the propulsion mechanism (5) on the first vertical plate is used to drive the third electrical measuring mechanism (6c) to move in the horizontal direction.

3. The single cell withstand voltage test tool according to claim 1, characterized in that: The electrical measurement mechanism (6) comprises an aluminum plate, on which an insulating gasket (601), a copper electrode (602) and a conductive sponge (603) are sequentially mounted.

4. A single cell withstand voltage test tool according to claim 2, characterized in that: The propulsion mechanism (5) comprises a screw rod (501), a hand wheel (502), a push plate (503) and a plurality of guide rods (504); the guide rods (504) are slidably connected to the mounting portion; the top end of each group of guide rods (504) is connected to the push plate (503); the push plate (503) is used to mount the electrical measuring mechanism (6); the middle part of the screw rod (501) is threadedly connected to the mounting portion; one end of the screw rod (501) is rotatably connected to the push plate (503); the other end of the screw rod (501) is connected to the hand wheel (502); the push plate (503) can be controlled to move by rotating the hand wheel (502).

5. The single cell withstand voltage test tool according to claim 2, characterized in that: Two groups of trapezoidal reinforcing plates are installed on the back sides of the two groups of vertical plates (2).

6. The single cell withstand voltage test tool according to claim 1, characterized in that: The tooling bottom plate (1) is made of 6061 aluminum alloy.

7. The single cell withstand voltage test tool according to claim 3, characterized in that: The copper electrodes (602) are all designed with threaded holes to facilitate connection with a withstand voltage test instrument.

8. The single cell withstand voltage test tool according to claim 3, characterized in that: The surface resistivity of the conductive sponge (603) is in the range of 10∧3 to 10∧6Ω / sq.

9. The single cell withstand voltage test tool according to claim 1, characterized in that: A plurality of handles (7) are installed on the tooling base plate (1).

Images