Flexible package battery insulation detection device

Abstract

The utility model discloses a flexible package battery insulation detection device, which comprises a bottom plate, a lifting device, a resistance measuring instrument, a probe and a contact block, the lifting device moves in the vertical direction, the probe and the contact block are respectively connected with two poles of the resistance measuring instrument through leads, a user can move a battery to be detected, and the battery to be detected can be detected. According to the technical scheme, the metal sheet is in contact with the aluminum layer of the aluminum plastic film of the flexible package battery, the probe is in contact with the tab of the flexible package battery, and the metal sheet, the aluminum plastic film of the flexible package battery, the probe and the resistance measuring instrument form a measuring loop, so that whether the shell of the flexible package battery is damaged or not is detected through the scheme; the damage to the outer surface layer of the aluminum plastic film is avoided, so that the surface of the flexible package battery subjected to insulation detection is more complete.

Description

Technical Field

[0001] This utility model relates to the field of lithium batteries, and more specifically, to a device for insulation testing of soft-pack batteries that use aluminum-plastic film as the outer shell. Background Technology

[0002] Currently, the cell casings of soft-pack batteries are mainly formed by pressing aluminum-plastic film. The aluminum-plastic film consists of a polypropylene (PP) layer, an aluminum layer, and a nylon layer from the inside out. The layers are bonded together with adhesives, and the aluminum-plastic film achieves insulation between the cell casing and the bare cell through the polypropylene layer.

[0003] Typically, during the manufacturing process of flexible packaging battery cells, abnormal heat sealing processes, foreign objects falling in, or poor quality of the aluminum-plastic film itself can lead to damage to the polypropylene layer that serves as insulation, causing direct contact between the electrolyte and the aluminum layer, resulting in corrosion and ultimately serious safety hazards. Therefore, after the flexible packaging battery cell is manufactured, the overall insulation testing of the battery cell is particularly important.

[0004] The patent with publication number CN211293130U describes a device for testing the insulation of the aluminum-plastic film of a soft-pack battery using a negative electrode conductive test needle, a positive electrode conductive test needle, and an insulation detector. The problem with this patent is that it requires setting an opening in the aluminum-plastic film of the battery cell to expose the aluminum layer for testing. This operation will damage the structure of the battery cell and reduce the overall insulation capacity of the soft-pack battery cell. Utility Model Content

[0005] The present invention aims to at least partially solve one of the technical problems in the related art. Therefore, one object of the present invention is to provide a device for insulation testing of pouch batteries.

[0006] This utility model discloses an insulation testing device for soft-pack batteries, including a base plate, a lifting device, a resistance measuring instrument, a probe, and a contact block. The lifting device is mounted on the base plate, the probe is mounted on the lifting device, and the contact block is mounted on the base plate. The lifting device is displaced in the vertical direction. The probe and the contact block are respectively connected to the two poles of the resistance measuring instrument through wires. The soft-pack battery body is placed on the base plate.

[0007] The number of probes is two, and they correspond to the positive and negative electrodes of the soft-pack battery, respectively.

[0008] The lifting device includes a support column, a fixed platform, a cylinder, and a lifting platform. The fixed platform is connected to the base plate through the support column. The cylinder is mounted on the fixed platform and passes through the fixed platform before being fixedly connected to the lifting platform. The probe is mounted on the lifting platform.

[0009] The metal sheet is arranged on the contact block and contacts the aluminum layer of the aluminum plastic film of the soft package battery, the probe contacts the tab of the soft package battery, and the metal sheet of the contact block, the aluminum plastic film of the soft package battery, the probe and the resistance measuring instrument form a measuring loop.

[0010] The present application utilizes the electric contact between the probe and the tab of the soft package battery, the contact between the contact block and the aluminum layer of the aluminum plastic film of the soft package battery, and forms a loop between any probe, contact block and resistance measuring instrument through the damaged aluminum plastic film if the aluminum plastic film is damaged, and cannot form a loop if the aluminum plastic film is not damaged.

[0011] In other embodiments, the probe can also be a conductive metal block or other contact block with conductive properties.

[0012] In one embodiment of the present application, the metal sheet is arranged on the side of the contact block facing the soft package battery, and the end of the metal sheet facing the soft package battery protrudes from the plane of the contact block.

[0013] The end of the metal sheet facing the soft package battery protrudes from the contact block, making it easier for the metal sheet to contact the aluminum layer of the aluminum plastic film of the soft package battery, and effectively eliminating errors caused by manual operation.

[0014] In one embodiment of the present application, the metal sheet comprises a blade having a blade edge, and the blade edge faces the soft package battery and contacts the aluminum plastic film of the soft package battery.

[0015] In one embodiment of the present application, the blade edge corresponds to the side edge of the soft package battery.

[0016] The metal sheet comprises a blade having a blade edge, and the blade edge faces the soft package battery, making it easier for the blade with the blade edge to contact the aluminum layer of the aluminum plastic film of the soft package battery and easier to detect damage to the aluminum plastic film.

[0017] In one embodiment of the present application, a movable object carrier box is arranged on the bottom plate, and the soft package battery is placed in the object carrier box.

[0018] The movable object carrier box is arranged on the bottom plate, and the user places the soft package battery in the object carrier box before performing the measurement operation on the soft package battery, and then moves the object carrier box to contact the aluminum plastic film of the soft package battery with the contact block, so that the contact block contacts the aluminum layer in the aluminum plastic film.

[0019] In one embodiment of the utility model, the number of the support is four, and is respectively located four corners of the fixed table.

[0020] The number of the support is four, and is respectively located four corners of the fixed table, so that the lifting of the lifting platform is more stable, and the accuracy of the detection of the soft package battery is increased.

[0021] In one embodiment of the utility model, the support passes through the lifting platform, and the lifting platform moves along the axis direction of the support.

[0022] After the technical scheme of the utility model is adopted, the probe and the soft package battery are electrically contacted with any tab, and the contact block and the aluminum layer of the aluminum plastic film of the soft package battery are contacted by moving the object carrying box, if the aluminum plastic film is damaged, a loop is formed between any probe, contact block and resistance measuring instrument through the damaged aluminum plastic film, if the aluminum plastic film is not damaged, a loop cannot be formed between any probe, contact block and resistance measuring instrument. The principle is used to detect whether the shell of the soft package battery is damaged. And since the metal sheet is selected to contact the aluminum layer, the damage to the outer surface layer of the aluminum plastic film is avoided, so that the outer surface of the soft package battery after insulation detection is more complete. BRIEF DESCRIPTION OF DRAWINGS

[0023] In order to more clearly illustrate the technical scheme in the embodiments of the present application or prior art, the drawings needed to be used in the embodiment or prior art description will be briefly introduced. Obviously, the drawings in the following description are some embodiments of the present application. Those skilled in the art can obtain other drawings according to these drawings without creating labor.

[0024] Fig. 1 It is a structure schematic view of a soft package battery insulation detection device.

[0025] Fig. 2 It is a partial schematic view of a soft package battery insulation detection device.

[0026] Among them, 1, bottom plate, 2, lifting device, 21, support, 22, fixed table, 23, air cylinder, 24, lifting platform, 3, resistance measuring instrument, 31, probe, 4, contact block, 41, metal sheet, 5, object carrying box. EMBODIMENT

[0027] As Figs. 1-2As shown, the embodiment discloses a soft package battery insulation detection device, which comprises a base plate 1, a lifting device 2, a resistance measuring instrument 3, a probe 31 and a contact block 4, the lifting device 2 is arranged on the base plate 1, the probe 31 is arranged on the lifting device 2, the contact block 4 is arranged on the base plate 1, the lifting device 2 is displaced in the vertical direction, the probe 31 and the contact block 4 are respectively connected with two poles of the resistance measuring instrument 3 through wires, and the soft package battery body is placed on the base plate 1.

[0028] The number of the probe 31 is two, and the probe 31 corresponds to the positive and negative electrode tabs of the soft package battery respectively; in other embodiments, the probe 31 can also be other contact structures capable of having conductive performance.

[0029] The lifting device 2 comprises a support column 21, a fixed table 22, a gas cylinder 23 and a lifting table 24, the fixed table 22 is connected with the base plate 1 through the support column 21, the gas cylinder 23 is arranged on the fixed table 22 and fixedly connected with the lifting table 24 after penetrating through the fixed table 22, and the probe 31 is arranged on the lifting table 24.

[0030] The number of the support column 21 is four, and the support column 21 is respectively located at four corners of the fixed table 22, so that the lifting of the lifting table 24 is more stable, and the accuracy of the detection for the soft package battery is increased. Meanwhile, the support column 21 penetrates through the lifting table 24, and the lifting table 24 moves along the axis direction of the support column 21.

[0031] A metal sheet 41 is arranged on the contact block 4, the metal sheet 41 contacts with the aluminum layer of the aluminum plastic film of the soft package battery, the probe 31 contacts with the tab of the soft package battery, the metal sheet 41, the aluminum plastic film of the soft package battery, the probe 31 and the resistance measuring instrument 3 form a measurement loop.

[0032] A movable object carrying box 5 is arranged on the base plate 1, when a user performs the measurement operation of the soft package battery, the soft package battery is first placed in the object carrying box 5, and then the object carrying box 5 is moved, so that the aluminum plastic film of the soft package battery contacts with the contact block 4, and the contact block 4 contacts with the aluminum layer in the aluminum plastic film.

[0033] In other embodiments, the metal sheet 41 is arranged on the side of the contact block 4 facing the soft package battery, and the end of the metal sheet 41 facing the soft package battery protrudes from the contact block 4, so that the metal sheet 41 is more easily contacted with the aluminum layer of the aluminum plastic film of the soft package battery, and the errors caused by manual operation can be effectively excluded.

[0034] In another embodiment, the metal sheet 41 comprises a blade with a blade edge, the blade edge faces the soft package battery and contacts with the aluminum plastic film of the soft package battery. After the blade with the blade edge contacts with the outer packaging film of the soft package battery, the blade is more easily connected with the aluminum layer in the aluminum plastic film, the damage of the aluminum plastic film is more easily detected, and the accuracy of the detection can be effectively improved.

[0035] Any combination of the technical features in the above-described embodiments can be made, and for the sake of brevity, not all possible combinations are described, however, as long as the combination of the technical features does not exist in contradiction, it shall be considered as within the scope of the present disclosure.

[0036] The above-described embodiments only express several implementation manners of the present application, the description is relatively specific and detailed, but it shall not be understood as a limitation on the scope of the present application patent. It should be pointed out that, for ordinary skilled in the art, several modifications and improvements can be made without departing from the first thought of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the present application patent shall be subject to the appended claims.

Claims

1. A soft package battery insulation detection device, characterized in that: it comprises a base plate, a lifting device, a resistance measuring instrument, a probe and a contact block, the lifting device is arranged on the base plate, the probe is arranged on the lifting device, the contact block is arranged on the base plate, the lifting device is displaced in the vertical direction, the probe and the contact block are respectively connected to the two poles of the resistance measuring instrument through wires, and the soft package battery body is placed on the base plate; the number of the probes is two, and they respectively correspond to the positive and negative electrode tabs of the soft package battery; the lifting device comprises a support column, a fixed table, a gas cylinder and a lifting table, the fixed table is connected to the base plate through the support column, the gas cylinder is arranged on the fixed table and fixedly connected to the lifting table after penetrating through the fixed table, and the probe is arranged on the lifting table; a metal sheet is arranged on the contact block, the metal sheet contacts the aluminum layer of the aluminum plastic film of the soft package battery, the probe contacts the electrode tab of the soft package battery, and the metal sheet of the contact block, the aluminum plastic film of the soft package battery, the probe and the resistance measuring instrument form a measurement loop.

2. The soft-packaged battery insulation detection device according to claim 1, characterized by: The metal sheet is arranged on the side of the contact block facing the soft package battery, and the end of the metal sheet facing the soft package battery protrudes out of the plane of the contact block.

3. The soft-pack battery insulation detection device according to claim 2, characterized by: The metal sheet comprises a blade with a blade edge, the blade edge faces the soft package battery and contacts the aluminum plastic film of the soft package battery.

4. The soft-pack battery insulation detection device according to claim 3, characterized by: The blade edge corresponds to the side edge of the soft package battery.

5. The soft-pack battery insulation detection device according to claim 1, characterized by: A movable object box is arranged on the base plate, and the soft package battery is placed in the object box.

6. The soft-pack battery insulation detection device according to claim 1, characterized by: The number of the support columns is four, and they are respectively located at the four corners of the fixed table.

7. The soft-pack battery insulation detection device according to claim 6, characterized by: The support columns penetrate through the lifting table, and the lifting table moves along the axis direction of the support columns.

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