Soft package cell thickness measuring device

Abstract

The utility model discloses a soft package battery cell thickness measuring device, comprising a conveying mechanism comprising a belt and a tray fixed on the belt and used for bearing a battery cell to be measured; the thickness measurement sensing assembly comprises a pressing plate, a pressure sensor and a thickness measurement sensor, and the pressure sensor and the thickness measurement sensor are arranged on the pressing plate; and the lifting mechanism is used for driving the pressing plate to selectively contact with the upper surface of the to-be-tested cell. According to the utility model, the thickness measurement sensing assembly and the lifting mechanism for measuring the thickness of the battery cell are additionally arranged on the PACK logistics line, so that the thickness measurement of the battery cell can be completed without taking down the battery cell in the belt conveying process, the thickness measurement value is stable and reliable, and the production efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the field of lithium battery module manufacturing, in particular to a soft-pack battery core thickness measuring device. Background Art

[0002] In the manufacturing process of lithium-ion battery soft-pack cells PACK, the thickness of the soft-pack cells needs to be tested before PACKing. Only the soft-pack cells with qualified thickness can flow into the next process for PACKing.

[0003] The soft-pack cell thickness detection technology of the existing soft-pack cell PACK production line also mostly uses mechanical actuators to drive the thickness measurement sensor components to detect the thickness of the soft-pack cell. However, at present, some production lines use mechanical mechanisms to take the soft-pack cells to a separate thickness detection station outside the logistics line for detection at the soft-pack cell thickness measurement station, and then return the soft-pack cells to the logistics line for the next PACK process. This method increases the types of production line equipment and the turnover time of soft-pack cells, reduces the production line cycle efficiency, and increases the cost of production line construction equipment. In addition, too much movement and transmission of soft-pack cells also increases the probability of adverse conditions such as soft-pack cell breakage, which is not conducive to the soft-pack cell PACK process. Therefore, in order to improve the cycle efficiency of the soft-pack cell PACK production line, it is particularly important to detect the thickness of soft-pack cells with low risk, automatic and high efficiency under the premise of reducing the cost of production line construction equipment. Utility Model Content

[0004] The purpose of the utility model is to provide a method to solve the problems raised in the above-mentioned background technology, realize online thickness detection of soft-pack battery cells on the PACK logistics line, solve the circulation time, and improve the production efficiency of the production line.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A soft-pack battery cell thickness measuring device, comprising:

[0007] A conveying mechanism, comprising a belt and a tray fixed on the belt for carrying the battery cell to be tested;

[0008] A thickness sensing assembly, comprising a pressing plate, a pressure sensor disposed on the pressing plate, and a thickness sensing sensor;

[0009] The lifting mechanism is used to drive the pressing plate to selectively contact the upper surface of the battery cell to be tested.

[0010] Furthermore, the number of the pressure sensors is at least three, and they are arranged in rows at equal distances along the length direction of the pressure plate.

[0011] Furthermore, the thickness sensor is installed on one side of the pressing plate, and the number of the thickness sensors is at least three, which are arranged in rows at equal distances along the length direction of the pressing plate.

[0012] Furthermore, the lifting mechanism includes a vertical pole, a longitudinally arranged guide rail is provided on the vertical pole, the guide rail is slidably connected to a first bracket, a lifting electric cylinder is provided on the first bracket, and the telescopic end of the lifting electric cylinder is connected to the pressure plate.

[0013] Furthermore, it also includes a lifting cylinder arranged at the bottom of the belt, and the lifting cylinder is fixed on the working platform through a second bracket.

[0014] Furthermore, the lifting electric cylinder is driven to move by a motor and a reducer fixed at its non-telescopic end.

[0015] Furthermore, a step portion is provided on the side of the tray corresponding to the side where the thickness measuring sensor is installed on the pressure plate.

[0016] Compared with the prior art, the beneficial effects of the utility model are:

[0017] The utility model adds a thickness sensor component and a lifting mechanism for measuring the thickness of the battery cell on the PACK logistics line, so that the thickness of the battery cell can be measured without removing it during the belt conveying process. The thickness measurement value is stable and reliable, which improves the production efficiency.

[0018] By setting a lifting cylinder under the belt, the belt is slightly lifted while the pressure plate is pressed down, keeping the belt height stable, improving the measurement accuracy and reducing belt wear. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the structure of the utility model;

[0020] Figure 2 for Figure 1 A partial enlarged view of

[0021] In the figure: 1-transmission mechanism, 11-belt, 12-tray, 121-step portion, 2-thickness sensor assembly, 21-pressing plate, 22-pressure sensor, 23-thickness sensor, 3-lifting mechanism, 31-vertical pole, 32-guide rail, 33-first bracket, 34-lifting electric cylinder, 35-motor, 36-reducer, 4-lifting cylinder, 5-second bracket, 6-battery cell to be tested. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] In the description of the present utility model, it should be noted that the terms "upper", "lower", "left", "right", "inside", "outside", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, or are the directions or positional relationships in which the utility model product is usually placed when in use. They are only for the convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present utility model.

[0024] See also Figure 1-2 , a soft-pack battery cell thickness measuring device, comprising:

[0025] The conveying mechanism 1 comprises a belt 11, and a tray 12 fixed on the belt 11 for carrying the battery cell to be tested. The tray 12 is rectangular, and a step portion 121 is provided on one long side thereof. A tray 12 is installed at a certain interval on the belt 11 so that the thickness measurement action can be performed continuously.

[0026] The thickness sensor assembly 2 includes a pressing plate 21, a pressure sensor 22 and a thickness sensor 23 arranged on the pressing plate 21. When measuring the thickness, the pressing plate 21 presses down on the upper surface of the battery cell 6 to be measured, and the pressure sensor 22 monitors the pressure values ​​of the two and transmits the data to the upper computer to control the pressing plate 21 to descend. The thickness sensor 23 is a laser rangefinder, and the light beam emitted by the laser rangefinder is irradiated on the step portion 121 to measure the distance between the pressing plate 21 and the tray 12 (minus the height of the step portion 121 itself).

[0027] The lifting mechanism 3 is used to drive the pressing plate 21 to selectively contact the upper surface of the battery cell to be tested, and includes a vertical rod 31, a guide rail 32, a first bracket 33, a lifting cylinder 34, a motor 35 and a reducer 36, wherein: the guide rail 32 is longitudinally arranged at the upper end of the vertical rod 31, and the first bracket 33 is slidably connected to the guide rail 32. Driven by the guide rail 32, the first bracket 33 can perform lifting movement; the lifting cylinder 34 is fixed on the first bracket 33, and the telescopic end of the lifting cylinder 34 faces downward and is fixedly connected to the pressing plate 21; the motor 35 and the reducer 36 are installed at the upper end of the lifting cylinder 34. Driven by the motor 35 and the reducer 36, the lifting cylinder 34 realizes lifting movement, thereby driving the pressing plate 21 to move up and down to complete the thickness measurement function.

[0028] Furthermore, the number of the pressure sensors 22 is at least three, which are arranged in rows at equal intervals along the length direction of the pressing plate 21 to respectively collect the pressure values ​​on both sides and the middle of the lower end surface of the pressing plate 21 .

[0029] Furthermore, a thickness sensor 23 is installed on one side of the pressure plate 21. The number of the thickness sensors 23 is at least three, which are arranged in rows equidistantly along the length direction of the pressure plate 21. The average value of the three measured data is taken to ensure the accuracy of the battery cell thickness measurement.

[0030] Furthermore, it also includes a lifting cylinder 4 arranged at the bottom of the belt 11, and the lifting cylinder 4 is fixed on the working platform through the second bracket 5. The telescopic end of the lifting cylinder 4 faces upward and acts on the lower end surface of the tray 12. When measuring the thickness, the pressing plate 21 presses down, which will cause the belt 11 to bear downward pressure, causing wear to the belt over time. The lifting cylinder 4 slightly lifts the tray 12, which can keep the belt height stable and improve the accuracy of the thickness measurement value.

[0031] When the utility model is in operation, according to the control of the host computer program, the belt 11 stops running when it brings the tray 12 to the thickness measuring station (i.e., below the pressing plate 21), and at the same time, the lifting cylinder 34 descends to drive the pressing plate 21 to press down (the pressing plate is pressed down and the lifting cylinder 4 is pushed up to slightly lift the belt 11), so that it contacts the battery cell 6 to be measured on the tray 12. After the pressure value measured by the pressure sensor 22 reaches the preset value, the lifting cylinder 34 stops descending, the thickness measuring sensor 23 measures the thickness value and records and uploads it, completing the thickness measuring action, the lifting cylinder 34 rises, the belt 11 continues to convey, and continues the next thickness measuring action.

[0032] Although this specification is described according to implementation modes, not every implementation mode includes only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

[0033] Therefore, the above description is only a preferred embodiment of the present application and is not intended to limit the scope of implementation of the present application; that is, all equivalent changes made according to the scope of the claims of the present application are within the protection scope of the claims of the present application.

Claims

1. A soft-pack battery cell thickness measuring device, characterized in that: include: A conveying mechanism (1) comprising a belt (11) and a tray (12) fixed on the belt (11) and used for carrying a battery cell (6) to be tested; A thickness sensing assembly (2), comprising a pressing plate (21), a pressure sensor (22) and a thickness sensing sensor (23) arranged on the pressing plate (21); The lifting mechanism (3) is used to drive the pressing plate (21) to selectively contact the upper surface of the battery cell (6) to be tested.

2. The soft-pack battery thickness measuring device according to claim 1, characterized in that: The number of the pressure sensors (22) is at least three, and they are arranged in rows at equal distances along the length direction of the pressure plate (21).

3. The soft-pack battery thickness measuring device according to claim 1, characterized in that: The thickness measuring sensors (23) are installed on one side of the pressing plate (21). The number of the thickness measuring sensors (23) is at least three and they are arranged in rows at equal distances along the length direction of the pressing plate (21).

4. The soft-pack battery thickness measuring device according to claim 1, characterized in that: The lifting mechanism (3) comprises a vertical rod (31), a longitudinally arranged guide rail (32) is provided on the vertical rod (31), the guide rail (32) is slidably connected to a first bracket (33), a lifting electric cylinder (34) is provided on the first bracket (33), and the telescopic end of the lifting electric cylinder (34) is connected to the pressing plate (21).

5. The soft-pack battery cell thickness measuring device according to claim 1, characterized in that: It also comprises a lifting cylinder (4) arranged at the bottom of the belt (11), and the lifting cylinder (4) is fixed on the working platform through a second bracket (5).

6. The soft-pack battery thickness measuring device according to claim 4, characterized in that: The lifting electric cylinder (34) is driven to move by a motor (35) and a reducer (36) fixed at its non-telescopic end.

7. The soft-pack battery core thickness measuring device according to claim 3, characterized in that: A step portion (121) is provided on the side of the tray (12) corresponding to the side of the pressing plate (21) where the thickness measuring sensor (23) is installed.

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