Cylindrical single cell testing device

Abstract

The utility model discloses a cylindrical single cell testing device which comprises a base, a cylindrical cell is vertically placed on the base, the base is further provided with a clamping plate and a fixing plate which are used for limiting the side face of the cylindrical cell, and the fixing plate is provided with a limiting groove used for containing the cylindrical cell. The clamping plate is provided with at least two groups of temperature detection pieces which are in contact with the outer side surface of the cylindrical battery cell and are used for collecting the temperature of the cylindrical battery cell, the at least two groups of temperature detection pieces are distributed in the vertical direction, and at least one side surface, which is not opposite to the cylindrical battery cell, of the clamping plate is provided with air holes. According to the cylindrical single battery cell testing device provided by the utility model, the cylindrical battery cell is in a vertical state in a test and is closer to a state in a use process of a battery pack, so that test data is more effective; the clamping plates are cooled through the heat dissipation holes, so that heat conduction of the clamping plates is reduced, and the temperature detection precision of the at least two temperature detection pieces is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of battery detection equipment, in particular to a cylindrical single-cell battery testing device. Background Art

[0002] At present, cylindrical cells have gradually occupied the new energy vehicle market, so the research and development and testing of cylindrical batteries are particularly critical. Detecting the temperature change during the cylindrical battery inspection is one of the parameters that need to be monitored during the inspection process. Due to the small size of cylindrical single batteries, the stability after placement is poor, and the temperature of different positions of the battery needs to be collected during the inspection process. The existing fixture can wrap and clamp the side of the cylindrical battery, but due to the thermal conductivity of the fixture and the contact between the fixture and the battery surface, the temperature collected at different positions of the battery is relatively inaccurate.

[0003] Therefore, there is an urgent need for a device that can ensure that the fixture can not only clamp the cylindrical battery but also ensure the accuracy of the temperature collection parameters at different positions of the battery. Utility Model Content

[0004] In order to solve the technical problems existing in the background technology, the utility model provides a cylindrical single cell testing device.

[0005] The utility model proposes a cylindrical single-cell testing device, comprising a base, on which a cylindrical cell is vertically placed, the base further being provided with a clamping plate and a fixing plate for limiting the side of the cylindrical cell, the fixing plate being provided with a limiting groove for accommodating the cylindrical cell, the clamping plate being provided with at least two groups of temperature detection members which are in contact with the outer side of the cylindrical cell and collect the temperature of the cylindrical cell, the at least two groups of temperature detection members being distributed in the vertical direction, and the clamping plate being provided with no air vents on at least one side opposite to the cylindrical cell.

[0006] In order to increase the accuracy of fixing the cylindrical battery core, preferably, a clamping groove is opened on the clamping plate, the clamping groove is in contact with the cylindrical battery core, and the detection end of the temperature detection member is located in the clamping groove.

[0007] Preferably, the inner diameter of the clamping groove is equal to the outer diameter of the cylindrical battery core, and the detection end of the temperature detection member and the inner side surface of the clamping groove are in the same arc surface.

[0008] Preferably, the inner diameter of the clamping groove is smaller than the outer diameter of the cylindrical battery cell, the detection end of the temperature detection member extends out of the clamping groove, and an elastic member is provided between the temperature detection member and the clamping plate, and the elastic member can undergo elastic deformation in a horizontal direction along the radial direction of the battery.

[0009] Preferably, the distance between the clamping plate and the fixing plate is adjustable so that the clamping plate can fix or release the cylindrical battery core in the limiting groove.

[0010] Preferably, the outer diameter of the limiting groove is equal to the outer diameter of the cylindrical battery core.

[0011] Preferably, the clamping plate comprises a mounting column and a clamping block mounted on the mounting column, the mounting column is mounted on the base, the vertical position of the clamping block on the mounting column is adjustable, and the temperature detecting element is mounted on the clamping block.

[0012] In order to detect cylindrical cells of different lengths, preferably, at least two groups of the clamping blocks are provided, the distance between the two groups of the clamping blocks is adjustable in the vertical direction, and at least one of the temperature detection members is provided on one of the clamping blocks.

[0013] In the utility model, in the proposed cylindrical single-cell testing device, the cylindrical cell is arranged on a base which is placed in a test cabinet during the testing process, and then the cylindrical cell is vertically placed in a limiting groove, and then the cylindrical cell is clamped between the clamp and a fixed plate by a clamp. The cylindrical cell is in a vertical state which is closer to the state of the battery pack during use, so that its test data is more effective; in addition, the cylindrical cell does not shake during the testing process, which greatly reduces the possibility of an increase in contact resistance; further, the clamp is cooled by setting heat dissipation holes to reduce the heat conduction of the clamp, thereby increasing the temperature detection accuracy of at least two groups of temperature detection components.

[0014] 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

[0015] Figure 1 It is a schematic diagram of the structure of the utility model;

[0016] Figure 2 Schematic diagram of the splint structure in some embodiments of the utility model;

[0017] Figure 3 Schematic diagram of the splint structure in some embodiments;

[0018] In the figure: 1, base; 2, fixing plate; 20, limiting groove; 3, clamping plate; 30, air vent; 31, clamping groove; 300, mounting column; 301, clamping block; 4, temperature detection member; 5, elastic member. DETAILED DESCRIPTION

[0019] 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.

[0020] like Figure 1 A cylindrical single cell testing device shown includes a base 1, a cylindrical cell is vertically placed on the base 1, the thickness of the base 1 is greater than 10 mm, the length of the base 1 is greater than 550 mm and the width is not less than 400 mm, and the base 1 is made of polyetherimide material, and the base 1 is also provided with a clamping plate 3 and a fixing plate 2 for limiting the side of the cylindrical cell, the fixing plate 2 is provided with a limiting groove for accommodating the cylindrical cell, and the clamping plate 3 is provided with at least two groups of temperature detection members 4 that contact the outer side of the cylindrical cell and collect the temperature of the cylindrical cell, and at least two groups of temperature detection members 4 are distributed in the vertical direction. In this embodiment, three groups of temperature detection members 4 are provided for detecting a cylindrical cell, wherein one group of temperature detection members 4 detects the temperature below the cylindrical cell, one group of temperature detection members 4 is used to detect the temperature in the middle of the cylindrical cell, and another group of temperature detection members 4 is used to detect the temperature above the cylindrical cell;

[0021] The clamping plate 3 does not have a vent hole 30 on at least one side opposite to the cylindrical battery core, that is, the side opposite to the limiting groove of the clamping plate 3 is a clamping surface, and a vent hole 30 is formed on one side opposite to the clamping surface, a side adjacent to the clamping surface, and a top surface. In this embodiment, the side opposite to the clamping surface, two side surfaces adjacent to the clamping surface, and the top surface all have vent holes 30, thereby reducing the thermal conductivity of the clamping plate 3 and increasing the detection accuracy of the temperature detection member 4;

[0022] During operation, the cylindrical battery cell is placed vertically on the base 1, and the outer side surface of the cylinder is partially covered in the limiting groove. In order to achieve the limiting fixation of the cylindrical battery cell, the inner diameter of the limiting groove is equal to the outer diameter of the cylindrical battery cell. Then the clamp 3 is moved and fixed relatively to the base 1, so that the three groups of temperature detection parts 4 are in contact with the outer side surface of the cylindrical battery cell. The clamp 3 and the fixed plate 2 clamp the cylindrical battery cell. At the same time, the detection ends of the three groups of temperature detection parts 4 are in contact with the outer side surface of the cylindrical battery cell. The cylindrical battery cell is in a vertical state, which is closer to the state of the battery pack during use, so that its test data is more effective; in addition, the cylindrical battery cell does not shake during the detection process, which greatly reduces the possibility of an increase in contact resistance; further, the clamp 3 is cooled by setting the heat dissipation holes to reduce the heat conduction of the clamp 3 and increase the temperature detection accuracy of at least two groups of temperature detection parts 4.

[0023] It should be noted that in order to fix cylindrical battery cells with different outer diameters, the fixing plate 2 is detachably mounted on the base 1 and can be replaced according to different cylindrical battery cells.

[0024] In order to increase the accuracy of fixing the cylindrical battery cell, preferably, a clamping groove 31 is opened on the clamping plate 3, the clamping groove 31 contacts the cylindrical battery cell, and the detection end of the temperature detection member 4 is located in the clamping groove 31. Preferably, the clamping groove 31 and the limit groove can be provided with multiple groups, one limit groove is opposite to one clamping groove 31, and one clamping plate 3 is moved to fix and detect at least two batteries. Figure 1 As shown, in some embodiments, the inner diameter of the clamping groove 31 is equal to the outer diameter of the cylindrical battery cell, and the detection end of the temperature detection member 4 and the inner side surface of the clamping groove 31 are in the same arc surface, thereby facilitating the fixation of the cylindrical battery cell.

[0025] Preferably, the inner diameter of the clamping groove 31 is smaller than the outer diameter of the cylindrical battery core, and the detection end of the temperature detection member 4 extends out of the clamping groove 31. Figure 2 As shown, an elastic member 5 is provided between the temperature detection member 4 and the clamping plate. The elastic member 5 can be a spring in the prior art. The elastic member 5 can undergo elastic deformation in the horizontal direction along the radial direction of the battery. Specifically, the elastic member 5 can undergo elastic deformation in the horizontal direction. In order to facilitate the installation of the temperature detection member 4, an installation groove is opened in the supporting groove in some embodiments, a section of the spring is fixed in the installation groove, and the other end of the spring is connected to the temperature detection member 4. When the cylindrical battery cell is clamped, the clamping groove 31 and the cylindrical battery cell are in contact with two lines along the axial direction, that is, the vertical direction, thereby achieving clamping of cylindrical batteries with different outer diameters without replacing the clamping plate 3, and the setting of the elastic member 5 ensures that the temperature detection member 4 contacts the side of the cylindrical battery cell, thereby ensuring the detection accuracy.

[0026] Preferably, the distance between the splint 3 and the fixed plate 2 is adjustable, and the splint 3 can be horizontally slidably installed on the base 1. Preferably, a reinforcing plate is provided on the side of the splint 3 away from the fixed plate 2, and screws or fixing pins are detachably installed between the splint 3 and the base 1 to facilitate the fixation of the splint 3, so that the splint 3 can fix or loosen the cylindrical battery cell in the limiting groove.

[0027] like Figure 3 As shown in some embodiments, preferably, the clamp 3 includes a mounting column 300 and a clamping block 301 mounted on the mounting column 300, the mounting column 300 is mounted on the base 1, and the vertical position of the clamping block 301 on the mounting column 300 is adjustable. Specifically, a sliding hole is opened on the clamping block 301, the mounting column 300 is slidably connected to the sliding hole, and a detachable fixing pin is installed between the mounting column 300 and the clamping block 301, the fixing pin is removed when the clamping block 301 is slid, and the fixing pin is installed after the clamping block 301 slides to the target position. The clamping block 301 is fixed on the mounting column 300, and the temperature detection component 4 is installed on the clamping block 301, so as to facilitate the detection of battery cells at different heights.

[0028] In order to further detect cylindrical cells of different heights, preferably, at least two groups of clamping blocks 301 are provided, the distance between the two groups of clamping blocks 301 is adjustable, and at least one temperature detection member 4 is provided on one clamping block 301. In order to further detect cylindrical cells of different heights, preferably, at least two groups of clamping blocks are provided, the distance between the two groups of clamping blocks is adjustable, and at least one temperature detection member is provided on one clamping block.

[0029] 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.

[0030] 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.

[0031] 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.

[0032] 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.

[0033] 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 cylindrical single cell testing device, comprising a base (1), on which a cylindrical cell is vertically placed, characterized in that: The base (1) is also provided with a clamping plate (3) and a fixing plate (2) for limiting the side of the cylindrical battery cell, the fixing plate (2) is provided with a limiting groove for accommodating the cylindrical battery cell, the clamping plate (3) is provided with at least two groups of temperature detection components (4) for contacting the outer side of the cylindrical battery cell and collecting the temperature of the cylindrical battery cell, at least two groups of the temperature detection components (4) are distributed in the vertical direction, and the clamping plate (3) is not provided with a vent hole (30) on at least one side opposite to the cylindrical battery cell.

2. The cylindrical single cell testing device according to claim 1, characterized in that: The clamping plate (3) is provided with a clamping groove (31), the clamping groove (31) is in contact with the cylindrical electric core, and the detection end of the temperature detection element (4) is located in the clamping groove (31).

3. The cylindrical single cell testing device according to claim 2, characterized in that: The inner diameter of the clamping groove (31) is equal to the outer diameter of the cylindrical battery core, and the detection end of the temperature detection element (4) and the inner side surface of the clamping groove (31) are within the same arc surface.

4. The cylindrical single cell testing device according to claim 2, characterized in that: The inner diameter of the clamping groove (31) is smaller than the outer diameter of the cylindrical battery core, the detection end of the temperature detection member (4) extends out of the clamping groove (31), and an elastic member (5) is provided between the temperature detection member (4) and the clamping plate, and the elastic member (5) can undergo elastic deformation in a horizontal direction along the radial direction of the battery.

5. The cylindrical single cell testing device according to claim 1, characterized in that: The distance between the clamping plate (3) and the fixing plate (2) is adjustable.

6. The cylindrical single cell testing device according to claim 1, characterized in that: The outer diameter of the limiting groove is equal to the outer diameter of the cylindrical battery core.

7. The cylindrical single cell testing device according to any one of claims 1 to 6, characterized in that: The clamping plate (3) comprises a mounting column (300) and a clamping block (301) mounted on the mounting column (300); the mounting column (300) is mounted on the base (1); the vertical position of the clamping block (301) on the mounting column (300) is adjustable; and the temperature detection component (4) is mounted on the clamping block (301).

8. The cylindrical single cell testing device according to claim 7, characterized in that: At least two groups of the clamping blocks (301) are provided, the distance between the two groups of the clamping blocks (301) is adjustable, and at least one of the temperature detection components (4) is provided on one of the clamping blocks (301).

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