Edge voltage testing device

Abstract

The utility model discloses an edge voltage testing device, which comprises a base, a testing platform, a conductive block, a cushion block, a probe, a driving mechanism and a voltage tester, wherein the test platform is connected to the base, a battery is placed on the test platform, an aluminum plastic film is arranged in the battery, and an aluminum layer is arranged in the aluminum plastic film. The conductive block is connected to the base and used for abutting against an edge sealing fracture of an aluminum-plastic film in a battery placed on the test platform so that the conductive block can make electrical contact with an aluminum layer in the aluminum-plastic film, and the cushion block is connected to the base and used for supporting a positive tab in the battery placed on the test platform. The probe is connected to the driving mechanism, and the driving mechanism is connected to the base and used for driving the probe to move to abut against the positive pole lug in the battery and pressing the positive pole lug on the cushion block. According to the utility model, the side voltage of the battery can be measured under the condition that an aluminum plastic film in the battery is not damaged.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of edge voltage testing devices. BACKGROUND

[0002] At present, there is an edge voltage testing process in the production process of soft pack lithium battery. The edge voltage is the voltage between the positive lug of soft pack lithium battery and the aluminum layer in the aluminum plastic film, which is an important indicator for evaluating the safety of the battery. In the edge voltage testing process, unqualified batteries need to be retested manually to reduce the error rate. However, since the battery has been a finished product after two-sealing and folding during the manual retesting of edge voltage, the aluminum plastic film in the battery cannot be damaged during the retesting of edge voltage. However, some existing testing devices cannot measure the edge voltage without damaging the aluminum plastic film. For example, a polymer lithium ion battery edge voltage testing device is disclosed in Chinese Patent No. CN206497152U, which requires the battery edge connecting needle to pierce the side aluminum plastic film of the battery to make contact with the aluminum layer in the aluminum plastic film. Therefore, the aluminum plastic film needs to be pierced during the measurement of edge voltage, and the edge voltage cannot be tested without damaging the aluminum plastic film. SUMMARY

[0003] The technical problem to be solved by the utility model is to overcome the defects of the prior art and provide an edge voltage testing device that can measure the edge voltage of the battery without damaging the aluminum plastic film in the battery.

[0004] To solve the above technical problems, the technical solution of the utility model is as follows: an edge voltage testing device, comprising a base, a testing platform, a conductive block, a pad, a probe, a driving mechanism and a voltage tester.

[0005] The testing platform is connected to the base, and the testing platform is used to place the battery. The battery has an aluminum plastic film, and the aluminum plastic film has an aluminum layer.

[0006] The conductive block is connected to the base and is used to abut the edge break of the aluminum plastic film in the battery placed on the testing platform to make the conductive block electrically contact with the aluminum layer in the aluminum plastic film.

[0007] The pad is connected to the base and is used to hold the positive lug in the battery placed on the testing platform.

[0008] The probe is connected to the driving mechanism.

[0009] The driving mechanism is connected to the base and is used to move the probe to abut the positive lug in the battery and press the positive lug on the pad.

[0010] The probe and the conductive block are respectively connected to the voltage tester.

[0011] Further, the conductive block is provided with a contact groove, and the edge of the aluminum plastic film is used to extend into the contact groove so as to make the conductive block abut against the fracture of the edge of the aluminum plastic film.

[0012] Further, the contact groove has an upper side wall, a lower side wall and a bottom wall, and the upper side wall, the lower side wall and the bottom wall are all convex arc structures.

[0013] Further, the conductive block is connected to the base through a first support, and the material of the conductive block is copper.

[0014] Further, the conductive block is located between the positive and negative poles of the battery placed on the test platform.

[0015] Further, a specific structure of the driving mechanism is provided, and the driving mechanism comprises a moving block and a telescopic driving member.

[0016] The moving block is slidingly connected to the base, and the probe is connected to the moving block.

[0017] The telescopic driving member is connected to the base, and the telescopic driving member is connected to the moving block and used to drive the moving block to move so as to drive the probe to move to abut against the positive pole and press the positive pole on the pad.

[0018] Further, a specific structure of the base is provided, and the base comprises a base plate, a mounting plate and at least two guide columns.

[0019] The test platform is connected to the base plate.

[0020] The lower end of the guide column is connected to the base plate.

[0021] The mounting plate is connected to the upper end of the guide column.

[0022] The moving block is slidingly connected to the guide column.

[0023] The telescopic driving member is connected to the mounting plate and connected to the moving block.

[0024] Further, the probe is connected to the moving block through a second support.

[0025] Further, the test platform is connected with a positioning block used to abut against the side of the battery to position the battery.

[0026] Further, the edge voltage testing device further comprises a locking bolt.

[0027] The positioning block has a waist-shaped hole extending along the width direction of the battery, and the locking bolt is connected to the test platform after penetrating through the waist-shaped hole, thereby locking the positioning block to the test platform.

[0028] After the above technical scheme is adopted, the battery has a positive electrode tab and a negative electrode tab, and the battery is packaged in an aluminum plastic film, and the edge of the aluminum plastic film has an edge sealing. The battery is placed on the test platform, the conductive block is abutted against the side fracture of the edge sealing on the aluminum plastic film to make the conductive block electrically connected with the aluminum layer in the aluminum plastic film, then the probe is moved to abut against the positive electrode tab in the battery and press the positive electrode tab on the pad block by the driving mechanism, since the probe and the conductive block are connected with the voltage tester respectively, the aluminum layer is connected with the voltage tester through the conductive block, the positive electrode tab is connected with the voltage tester through the probe, and a loop is formed to measure the edge voltage of the battery by the voltage tester, and the aluminum plastic film in the battery is not damaged, and the edge voltage of the battery is measured without damaging the aluminum plastic film in the battery. BRIEF DESCRIPTION OF DRAWINGS

[0029] Figure 1 It is a structural schematic view of the edge voltage testing device of the utility model;

[0030] Figure 2 It is a partial detail view of the edge voltage testing device of the utility model at the conductive block and the probe;

[0031] Figure 3 It is a structural schematic view of the conductive block and the first support of the utility model;

[0032] Figure 4 It is a structural schematic view of the battery of the utility model;

[0033] Figure 5 It is a side view of the battery and the conductive block of the utility model. DETAILED DESCRIPTION

[0034] In order to make the content of the utility model more easily and clearly understood, the utility model is further explained in detail below according to specific embodiments and in combination with the drawings.

[0035] As Figures 1-5 shown, an edge voltage testing device includes a base 1, a test platform 2, a conductive block 3, a pad block 4, a probe 5, a driving mechanism and a voltage tester;

[0036] The test platform 2 is connected to the base 1, the test platform 2 is used for placing a battery 6, the battery 6 has an aluminum plastic film 7, and the aluminum plastic film 7 has an aluminum layer 8;

[0037] The conductive block 3 is connected to the base 1 and used to abut the broken edge of the sealing edge 9 of the aluminum plastic film 7 in the battery 6 placed on the test platform 2 to make the conductive block 3 electrically contact with the aluminum layer 8 in the aluminum plastic film 7;

[0038] The cushion block 4 is connected to the base 1 and used to support the positive pole lug 10 in the battery 6 placed on the test platform 2;

[0039] The probe 5 is connected to the driving mechanism, the driving mechanism is connected to the base 1 and used to drive the probe 5 to abut the positive pole lug 10 in the battery 6 and press the positive pole lug 10 on the cushion block 4;

[0040] The probe 5 and the conductive block 3 are respectively connected to the voltage tester. Specifically, the battery 6 is a soft pack lithium battery, and it is well known that the battery 6 has a positive pole lug 10 and a negative pole lug 11, and the battery 6 is packaged in an aluminum plastic film 7, and the edge of the aluminum plastic film 7 has a sealing edge 9. The battery 6 is placed on the test platform 2, so that the conductive block 3 abuts the side break of the sealing edge 9 on the aluminum plastic film 7, thereby making the conductive block 3 electrically contact with the aluminum layer 8 in the aluminum plastic film 7, and then the driving mechanism drives the probe 5 to abut the positive pole lug 10 in the battery 6 and press the positive pole lug 10 on the cushion block 4. Since the probe 5 and the conductive block 3 are respectively connected to the voltage tester, the aluminum layer 8 is connected to the voltage tester through the conductive block 3, and the positive pole lug 10 is connected to the voltage tester through the probe 5, thereby forming a loop to measure the edge voltage of the battery 6 by the voltage tester, and the aluminum plastic film 7 in the battery 6 is not damaged, so that the edge voltage of the battery 6 is measured without damaging the aluminum plastic film 7 in the battery 6. In this embodiment, the probe 5 is connected to the positive pole of the voltage tester, and the conductive block 3 is connected to the negative pole of the voltage tester. The specific structure of the voltage tester is well known to those skilled in the art, and will not be described in detail in this embodiment.

[0041] As shown in Figure 3 , 5 The conductive block 3 is provided with a contact groove 12, and the sealing edge 9 on the aluminum plastic film 7 is used to extend into the contact groove 12, thereby making the conductive block 3 abut the break of the sealing edge 9 on the aluminum plastic film 7.

[0042] As shown in Figure 5 The contact groove 12 has an upper side wall 13, a lower side wall 14 and a bottom wall 15, and the upper side wall 13, the lower side wall 14 and the bottom wall 15 are all convex arc surface structures. This design can make the aluminum layer 8 in the aluminum plastic film 7 fully contact with the conductive block 3 and keep good electrical conductivity, effectively avoiding the problem of inaccurate measurement caused by poor contact.

[0043] As shown in Figure 2 , 3 , the conductive block 3 is connected to the base 1 through a first support 16, and the conductive block 3 is made of copper; specifically, the first support 16 is connected to the base 1, and the conductive block 3 is connected to the first support 16.

[0044] As shown in Figure 1 , 2 , the conductive block 3 is located between the positive and negative tabs 10 and 11 in the battery 6 placed on the test platform 2, so that the conductive block 3 is in contact with the broken edge 9 of the aluminum plastic film 7 between the positive and negative tabs 10 and 11.

[0045] As shown in Figure 1 , 2 , the driving mechanism can include a moving block 17 and a telescopic driving member 18;

[0046] The moving block 17 is slidingly connected to the base 1, and the probe 5 is connected to the moving block 17;

[0047] The telescopic driving member 18 is connected to the base 1, and the telescopic driving member 18 is connected to the moving block 17 and used to drive the moving block 17 to move and in turn drive the probe 5 to move to abut against the positive tab 10 and press the positive tab 10 on the pad 4; specifically, the moving block 17 is slidingly connected to the base 1 in the up-down direction.

[0048] As shown in Figure 1 , the base 1 can include a base plate 19, a mounting plate 20, and at least two guide columns 21;

[0049] The test platform 2 is connected to the base plate 19;

[0050] The lower end of the guide column 21 is connected to the base plate 19;

[0051] The mounting plate 20 is connected to the upper end of the guide column 21;

[0052] The moving block 17 is slidingly connected to the guide column 21;

[0053] The telescopic driving member 18 is connected to the mounting plate 20 and connected to the moving block 17; in this embodiment, the telescopic driving member can be a pneumatic cylinder, and the first support 16 and the pad 4 are both connected to the base plate 19.

[0054] As shown in Figure 1As shown, the probe 5 is connected to the movable block 17 via the second bracket 22; specifically, the second bracket 22 is connected to the movable block 17, and the probe 5 is connected to the second bracket 22.

[0055] like Figure 1 As shown, the test platform 2 is connected to a positioning block 23 for positioning the battery 6 against its side. Specifically, during testing, the battery 6 is placed on the test platform 2 and rests against the positioning block 23. Then, the battery 6 is pushed forward so that the sealing edge 9 on the aluminum-plastic film 7 in the battery 6 extends into the contact groove 12 and the break on the sealing edge 9 abuts against the conductive block 3. At this time, the positive electrode tab 10 is located above the pad 4. The telescopic drive member 18 drives the moving block 17 to move downward, thereby driving the probe 5 to move downward to abut against the positive electrode tab 10 and press the positive electrode tab 10 onto the pad 4. At this time, the positive electrode tab 10 is connected to the positive terminal of the voltage tester through the probe 5, and the aluminum layer 8 is connected to the negative terminal of the voltage tester through the conductive block 3, thereby forming a circuit so that the side voltage of the battery 6 can be measured by the voltage tester without damaging the aluminum-plastic film 7 in the battery 6.

[0056] like Figure 1 As shown, the side voltage testing device also includes a locking bolt. The positioning block 23 has an oblong hole 24 extending along the width direction of the battery 6. The locking bolt passes through the oblong hole 24 and is connected to the test platform 2, thereby locking the positioning block 23 to the test platform 2. Specifically, loosening the locking bolt can adjust the position of the positioning block 23, thereby enabling side voltage testing of batteries 6 of different sizes.

[0057] In summary, the battery 6 has a positive tab 10 and a negative tab 11, and the battery 6 is encapsulated in an aluminum-plastic film 7, the edge of which is sealed with an edge 9. The battery 6 is placed on the test platform 2, so that the conductive block 3 abuts against the side break of the edge 9 on the aluminum-plastic film 7, thereby making electrical contact between the conductive block 3 and the aluminum layer 8 in the aluminum-plastic film 7. Then, the driving mechanism moves the probe 5 to abut against the positive tab 10 in the battery 6 and presses the positive tab 10 onto the pad 4. Since the probe 5 and the conductive block 3 are respectively connected to the voltage tester, the aluminum layer 8 is connected to the voltage tester through the conductive block 3, and the positive tab 10 is connected to the voltage tester through the probe 5, thus forming a circuit for measuring the side voltage of the battery 6 without damaging the aluminum-plastic film 7 in the battery 6. This achieves the measurement of the side voltage of the battery 6 without damaging the aluminum-plastic film 7 in the battery 6.

[0058] The above-described specific embodiments further specifically describe the technical problems, technical solutions and beneficial effects solved by the present application, and it should be understood that the above-described specific embodiments are merely specific embodiments of the present application and are not used to limit the present application, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A side voltage testing device, characterized in that, Includes a base (1), a test platform (2), a conductive block (3), a pad (4), a probe (5), a drive mechanism, and a voltage tester; The test platform (2) is connected to the base (1), and the test platform (2) is used to place the battery (6). The battery (6) has an aluminum-plastic film (7) and an aluminum layer (8) in the aluminum-plastic film (7). The conductive block (3) is connected to the base (1) and is used to abut against the edge (9) of the sealing edge (7) of the aluminum-plastic film (7) in the battery (6) placed on the test platform (2) so that the conductive block (3) is in electrical contact with the aluminum layer (8) in the aluminum-plastic film (7). The pad (4) is connected to the base (1) and is used to support the positive tab (10) of the battery (6) placed on the test platform (2). The probe (5) is connected to the drive mechanism; The drive mechanism is connected to the base (1) and is used to move the probe (5) to abut the positive electrode tab (10) in the battery (6) and press the positive electrode tab (10) onto the pad (4); The probe (5) and the conductive block (3) are respectively connected to the voltage tester.

2. The edge voltage testing device according to claim 1, characterized in that, The conductive block (3) is provided with a contact groove (12), and the sealing edge (9) on the aluminum-plastic film (7) is used to extend into the contact groove (12) so that the conductive block (3) and the broken edge (9) on the aluminum-plastic film (7) come into contact.

3. The edge voltage testing device according to claim 2, characterized in that, The contact groove (12) has an upper sidewall (13), a lower sidewall (14) and a bottom wall (15), and the upper sidewall (13), the lower sidewall (14) and the bottom wall (15) are all convex arc surface structures.

4. The edge voltage testing device according to claim 1, characterized in that, The conductive block (3) is connected to the base (1) via the first bracket (16), and the conductive block (3) is made of copper.

5. The edge voltage testing device according to claim 1, characterized in that, The conductive block (3) is located between the positive tab (10) and the negative tab (11) of the battery (6) placed on the test platform (2).

6. The edge voltage testing device according to claim 1, characterized in that, The drive mechanism includes a movable block (17) and a telescopic drive component (18). The movable block (17) is slidably connected to the base (1), and the probe (5) is connected to the movable block (17); The telescopic drive (18) is connected to the base (1). The telescopic drive (18) is connected to the moving block (17) and is used to drive the moving block (17) to move, thereby driving the probe (5) to move to abut the positive electrode (10) and press the positive electrode (10) onto the pad (4).

7. The edge voltage testing device according to claim 6, characterized in that, The base (1) includes a base plate (19), a mounting plate (20) and at least two guide posts (21). The test platform (2) is connected to the substrate (19); The lower end of the guide post (21) is connected to the base plate (19); The mounting plate (20) is connected to the upper end of the guide post (21); The movable block (17) is slidably connected to the guide post (21); The telescopic drive (18) is connected to the mounting plate (20) and connected to the moving block (17).

8. The edge voltage testing device according to claim 6, characterized in that, The probe (5) is connected to the movable block (17) via the second bracket (22).

9. The edge voltage testing device according to claim 1, characterized in that, The test platform (2) is connected to a positioning block (23) for positioning the battery (6) by abutting against the side of the battery (6).

10. The edge voltage testing device according to claim 9, characterized in that, It also includes locking bolts; The positioning block (23) has a waist-shaped hole (24) extending along the width direction of the battery (6). The locking bolt passes through the waist-shaped hole (24) and is connected to the test platform (2), thereby locking the positioning block (23) to the test platform (2).

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