Battery cell cover plate, battery, and battery testing method

Abstract

The application relates to a battery cell cover plate, a battery and a battery testing method, and belongs to the technical field of batteries. The riveting block comprises a fixed part and a clamping part protruding from the fixed part in the thickness direction; the surface of the fixed part facing the cover plate body is in abutment with a first plastic part; the surface of the clamping part facing the cover plate body has a clamping gap with the first plastic part, and the clamping gap can be connected with a testing device without damage. The application can avoid the thermal damage caused by the process of adopting a connecting sheet welding or stud welding in the related art, supports repeated testing of a single battery cell, and significantly reduces the testing cost.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of batteries, in particular to a battery cell cover plate, a battery and a battery testing method. BACKGROUND

[0002] With the rapid development of battery technology, the application scale of lithium ion batteries as core energy storage elements continues to expand; with the exponential growth of the installed capacity of power batteries, the demand for large-scale performance testing of battery cells has arisen.

[0003] In related technologies, a process form of tab welding or stud welding is used to realize the electrical connection of the battery cell and the testing equipment.

[0004] However, the technical bottleneck of the above welding type connection scheme is that due to the irreversible metallurgical bonding generated in the welding process, the material melting loss and structural deformation of the battery cell pole after testing will cause physical damage, resulting in a decrease in the sealing performance of the battery cell and the inability to be reused. SUMMARY

[0005] Therefore, it is necessary to provide a battery cell cover plate, a battery and a battery testing method to realize the lossless connection of the battery cell testing, so that the tested battery cell can be reused and the testing cost is reduced.

[0006] A battery cell cover plate comprises:

[0007] A cover plate body having a mounting hole and defining a thickness direction based on the cover plate body;

[0008] A first plastic part and a second plastic part are respectively arranged on both sides of the thickness direction of the cover plate body;

[0009] A pole penetrating through the second plastic part, the mounting hole and the first plastic part;

[0010] A sealing ring at least partially arranged between the cover plate body and the pole; and

[0011] A riveting block riveted with an end of the pole on the side of the first plastic part;

[0012] The riveting block comprises a fixed part and a clamping part protruding from the fixed part perpendicular to the thickness direction;

[0013] The surface of the fixed part facing the cover plate body abuts against the first plastic part;

[0014] The surface of the clamping part facing the cover plate body has a clamping gap between the first plastic part.

[0015] In one embodiment, the first plastic part includes a transverse extension portion and a longitudinal extension portion between the cover body and the rivet block; the inner wall surface of the longitudinal extension portion and the transverse extension portion form a cavity in the thickness direction away from the bottom wall surface of the cover body, and the fixing portion is partially embedded in the cavity; the longitudinal extension portion has a top surface in the thickness direction away from the cover body; the clamping portion has a clamping surface in the thickness direction close to the longitudinal extension portion; the clamping gap is formed between the top surface and the clamping surface.

[0016] In one embodiment, the angle between the locking surface and the top surface is α, and 0°≤α≤90°; the angle between the bottom wall surface and the inner wall surface is β, and 90°≤β<180°.

[0017] In one embodiment, the fixing portion further includes a stepped portion adjacent to the clamping portion, and the stepped portion is pressed against the top surface.

[0018] On the other hand, the present application also provides a battery, comprising the above-mentioned battery cell cover.

[0019] On the other hand, the present application also provides a battery testing method, comprising:

[0020] Providing a battery as described above;

[0021] Inserting the clamping member of the testing device into the clamping gap between the clamping portion and the first plastic member;

[0022] Perform a battery performance test.

[0023] In one embodiment, the clamping member includes a docking plate arranged perpendicular to the thickness direction, and an embedding portion extending toward the cover plate body in the thickness direction, and is embedded in the clamping gap through the embedding portion.

[0024] In one embodiment, the docking plate and the embedded portion are an integrated structure.

[0025] In one embodiment, after the battery performance test is completed, the testing device and the battery are separated.

[0026] The above-mentioned battery cell cover, battery and battery testing method utilize the specific structure of the riveted block to achieve lossless connection with the testing equipment, replacing the traditional welding process. It does not require high-temperature welding, can avoid physical damage, eliminate material melting loss and structural deformation, and maintain the sealing of the battery cell. After the test, the battery cell and the equipment can be quickly separated without residual damage, supporting multiple repeated tests or secondary use, significantly reducing testing costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is a schematic diagram of the overall structure of the present application in Example 1.

[0028] Figure 2 for Figure 1 Magnified view of section A in .

[0029] Figure 3 This is a schematic structural diagram of the first plastic part in Example 1 of the present application.

[0030] Figure 4 This is a connection diagram of the test state in Example 1 of this application.

[0031] Figure 5 This is a structural diagram of the docking plate in the test state in Example 1 of the present application.

[0032] Figure 6 This is a schematic diagram of the overall structure of the second embodiment of the present application.

[0033] Figure 7 for Figure 6 Magnified view of part B in .

[0034] Figure 8 This is a schematic diagram of the overall structure of Example 3 of this application.

[0035] Figure 9 for Figure 8 Magnified view of section C in .

[0036] Figure 10 This is a schematic diagram of the overall structure of the fourth embodiment of the present application.

[0037] Figure 11 for Figure 10 Magnified view of section D in .

[0038] Figure 12 This is a schematic diagram of the overall structure of Example 5 of this application.

[0039] Figure 13 for Figure 12 Magnified view of section E in .

[0040] Wherein: 100, riveting block; 200, first plastic part; 300, cover body; 400, second plastic part; 500, terminal; 600, sealing ring; 700, testing equipment;

[0041] 101, fixing portion; 102, clamping portion; 102a, clamping surface;

[0042] 1011, pressure step;

[0043] 201, transverse extension portion; 202, longitudinal extension portion;

[0044] 201a, bottom wall surface;

[0045] 202a, inner wall surface; 202b, top surface;

[0046] 710, clamping member;

[0047] K1, first split line; K2, second split line. DETAILED DESCRIPTION

[0048] In order to make the above objectives, characteristics and advantages of the present application more apparent, a detailed description of the specific embodiments of the present application will be given below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. However, the present application can be practiced in a number of different manners other than those described herein, and it is understood that similar modifications of this disclosure can be undertaken by workers skilled in the art in general without departing from the scope of the present application and therefore the present application is not limited to the specific embodiments disclosed below.

[0049] In the description of the present application, it should be understood that if the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0050] In addition, if the terms "first", "second" appear, these terms are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features referred to. Therefore, the features limited by "first", "second" can explicitly or implicitly include at least one of the features. In the description of the present application, if the term "a plurality of" appears, the meaning of "a plurality of" is at least two, for example, two, three, etc., unless otherwise specifically limited.

[0051] In the present application, unless otherwise specifically defined and limited, if the terms "mounting", "connecting", "connecting", "fixing" and the like appear, these terms should be broadly understood. For example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise specifically limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0052] In this application, unless otherwise expressly specified or limited, if a first feature is described as being "above" or "below" a second feature, or similar descriptions, this may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Furthermore, when a first feature is described as being "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is described as being "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0053] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be an intermediate element. If an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. If any, the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in this application are for illustrative purposes only and do not represent the only embodiment.

[0054] The present application provides a battery cell cover, comprising:

[0055] The cover plate body 300 is provided with a mounting hole, and the thickness direction is defined based on the cover plate body 300;

[0056] The first plastic part 200 and the second plastic part 400 are respectively arranged on both sides of the cover body 300 in the thickness direction;

[0057] The pole 500 passes through the second plastic part 400, the mounting hole and the first plastic part 200;

[0058] The sealing ring 600 is at least partially disposed between the cover plate body 300 and the pole 500; and

[0059] The riveting block 100 is riveted to the end of the pole 500 located on one side of the first plastic part 200;

[0060] The riveting block 100 includes a fixing portion 101 and a clamping portion 102 protruding from the fixing portion 101 in a direction perpendicular to the thickness.

[0061] The surface of the fixing portion 101 facing the cover body 300 abuts against the first plastic component 200;

[0062] A clamping gap is defined between the surface of the clamping portion 102 facing the cover body 300 and the first plastic component 200 .

[0063] In some embodiments, the first plastic component 200 includes a transverse extension portion 201 and a longitudinal extension portion 202 between the cover body 300 and the rivet block 100; an inner wall surface 202a of the longitudinal extension portion 202 and a bottom wall surface 201a of the transverse extension portion 201 facing away from the cover body 300 in the thickness direction form a cavity, and the fixing portion 101 is partially embedded in the cavity; the longitudinal extension portion 202 has a top surface 202b facing away from the cover body 300 in the thickness direction; the clamping portion 102 has a clamping surface 102a adjacent to the longitudinal extension portion 202 in the thickness direction; and a clamping gap is formed between the top surface 202b and the clamping surface 102a.

[0064] In some embodiments, the included angle between the engaging surface 102 a and the top surface 202 b is α, and 0°≤α≤90°.

[0065] In some embodiments, the included angle between the bottom wall surface 201 a and the inner wall surface 202 a is β, and 90°≤β<180°.

[0066] In some embodiments, the fixing portion 101 further includes a stepped portion 1011 adjacent to the clamping portion 102 , and the stepped portion 1011 is pressed against the top surface 202 b .

[0067] Example 1:

[0068] See also Figure 1-Figure 3 In this embodiment, if Figure 2 K1 is shown as a first dividing line, which divides the riveted block into a fixed portion 101 and a clamping portion 102. A clamping gap is formed between the clamping surface 102a of the clamping portion 102 and the top surface 202b of the longitudinal extension portion 202, with an included angle of α. The included angle between the inner wall surface 202a of the longitudinal extension portion 202 and the bottom wall surface 201a of the transverse extension portion 201 in the thickness direction facing away from the cover plate body 300 is β.

[0069] In this embodiment, the angle α satisfies 0°<α<90°, and the sum of the angle α and the angle β is 180°;

[0070] During testing, the clamping member 710 of the testing device 700 is embedded in the clamping gap.

[0071] Example 2:

[0072] See also Figure 6-Figure 7 In this embodiment, if Figure 7 K1 is shown as a first dividing line, which divides the riveted block into a fixed portion 101 and a clamping portion 102. A clamping gap is formed between the clamping surface 102a of the clamping portion 102 and the top surface 202b of the longitudinal extension portion 202, and the included angle is α; the included angle between the inner wall surface 202a of the longitudinal extension portion 202 and the bottom wall surface 201a of the transverse extension portion 201 in the thickness direction facing away from the cover plate body 300 is β.

[0073] In this embodiment, the included angle α satisfies 0°<α<90°, and the included angle β=90°;

[0074] During testing, the clamping member 710 of the testing device 700 is embedded in the clamping gap.

[0075] Example 3:

[0076] See also Figure 8-Figure 9 In this embodiment, if Figure 9 K1 is shown as a first dividing line, which divides the riveted block into a fixed portion 101 and a clamping portion 102. A clamping gap is formed between the clamping surface 102a of the clamping portion 102 and the top surface 202b of the longitudinal extension portion 202, and the included angle is α; the included angle between the inner wall surface 202a of the longitudinal extension portion 202 and the bottom wall surface 201a of the transverse extension portion 201 in the thickness direction facing away from the cover plate body 300 is β.

[0077] In this embodiment, the included angle α satisfies the included angle α=0° and the included angle β=90°;

[0078] During testing, the clamping member 710 of the testing device 700 is embedded in the clamping gap.

[0079] Example 4:

[0080] See also Figure 10-11 ,like Figure 11 K1 is shown as the first cutting line, and K2 is shown as the second cutting line. In this embodiment, the riveting block is divided into a fixing portion 101 and a clamping portion 102. The fixing portion 101 further includes a stepped portion 1011 adjacent to the clamping portion 102. The stepped portion 1011 is formed between the first cutting line K1 and the second cutting line K2, and the stepped portion 1011 is pressed against the top surface 202b.

[0081] A clamping gap is formed between the clamping surface 102a of the clamping portion 102 and the top surface 202b of the longitudinal extension portion 202, and the included angle is α; the included angle between the inner wall surface 202a of the longitudinal extension portion 202 and the bottom wall surface 201a of the transverse extension portion 201 in the thickness direction facing away from the cover plate body 300 is β;

[0082] In this embodiment, the angle α=0°, the angle β=90°;

[0083] During testing, the clamping member 710 of the testing device 700 is embedded in the clamping gap.

[0084] Embodiment 5:

[0085] See also Figure 12-13 ,like Figure 13K1 is shown as the first cutting line, and K2 is shown as the second cutting line. In this embodiment, the riveting block is divided into a fixing portion 101 and a clamping portion 102. The fixing portion 101 further includes a stepped portion 1011 adjacent to the clamping portion 102. The stepped portion 1011 is formed between the first cutting line K1 and the second cutting line K2, and the stepped portion 1011 is pressed against the top surface 202b.

[0086] A clamping gap is formed between the clamping surface 102a of the clamping portion 102 and the top surface 202b of the longitudinal extension portion 202;

[0087] In this embodiment, the engaging surface 102a is an arc surface. The angle between the leftmost tangent of the arc surface in the figure and the top surface 202b is α. The angle between the inner wall surface 202a of the longitudinal extension portion 202 and the bottom wall surface 201a of the transverse extension portion 201 in the thickness direction facing away from the cover plate body 300 is β.

[0088] In this embodiment, the angle α=90°, the angle β=90°;

[0089] During testing, the clamping member 710 of the testing device 700 is embedded in the clamping gap.

[0090] On the other hand, the present application also provides a battery, comprising the above-mentioned battery cell cover.

[0091] On the other hand, please refer to Figure 4-Figure 5 The present application also provides a method for testing the above-mentioned battery, comprising:

[0092] Providing the battery in the above embodiment;

[0093] Insert the clamping member 710 of the testing device 700 into the clamping gap between the clamping portion 102 and the first plastic member 200;

[0094] Perform a battery performance test.

[0095] Furthermore, the clamping member 710 includes a docking plate 711 arranged perpendicular to the thickness direction, and an embedding portion 712 extending toward the cover body 300 in the thickness direction, and is embedded in the clamping gap through the embedding portion 712;

[0096] Furthermore, the docking plate 711 and the embedding portion 712 are an integrated structure.

[0097] After the battery performance test is completed, the testing device 700 is separated from the battery.

[0098] To sum up, the present application utilizes the specific structure of the riveted block 100 to achieve a lossless connection with the clamping part 710 of the test equipment 700, replacing the traditional welding process. It does not require high-temperature welding, can avoid physical damage, and maintain the sealing of the battery cell. After the test, the battery cell and the test equipment 700 can be quickly separated, supporting multiple repeated tests or secondary uses, thereby reducing testing costs.

[0099] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0100] The above-described embodiments merely represent several implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that a person of ordinary skill in the art may make various modifications and improvements without departing from the spirit of the present application, and these modifications and improvements fall within the scope of protection of the present application. Therefore, the scope of protection of the present patent application shall be determined by the appended claims.

Claims

1. A battery cell cover, comprising: The cover plate body is provided with a mounting hole and defines a thickness direction based on the cover plate body; The first plastic part and the second plastic part are respectively arranged on both sides of the cover body in the thickness direction; a pole, passing through the second plastic part, the mounting hole and the first plastic part; a sealing ring, at least partially disposed between the cover plate body and the pole; and a riveting block, riveted to the end of the pole located on one side of the first plastic component; It is characterized in that The riveting block includes a fixing portion and a clamping portion protruding from the fixing portion in a direction perpendicular to the thickness; The surface of the fixing portion facing the cover body abuts against the first plastic part; A clamping gap is defined between the surface of the clamping portion facing the cover body and the first plastic component, and the clamping gap is used for embedding a clamping component of a testing device.

2. The cell cover according to claim 1, characterized in that: The first plastic part includes a transverse extension portion and a longitudinal extension portion between the cover body and the riveting block; The inner wall surface of the longitudinal extension portion and the bottom wall surface of the transverse extension portion facing away from the cover plate body in the thickness direction form a cavity, and the fixing portion is partially embedded in the cavity; The longitudinal extension portion has a top surface facing away from the cover plate body in the thickness direction; The clamping portion has a clamping surface in the thickness direction close to the longitudinal extension portion; The clamping gap is formed between the top surface and the clamping surface.

3. The cell cover according to claim 2, characterized in that: The included angle between the clamping surface and the top surface is α, and 0°≤α≤90°.

4. The cell cover according to claim 2 or 3, characterized in that: The included angle between the bottom wall surface and the inner wall surface is β, and 90°≤β<180°.

5. The cell cover according to claim 2 or 3, characterized in that: The fixing portion further includes a stepped portion adjacent to the clamping portion, and the stepped portion is pressed against the top surface.

6. A battery, characterized in that: The invention comprises the battery cell cover plate according to any one of claims 1 to 5.

7. A battery testing method, characterized in that: include: Providing a battery as claimed in claim 6; Inserting the clamping member of the testing device into the clamping gap between the clamping portion and the first plastic member; Perform a battery performance test.

8. The battery testing method according to claim 7, wherein: The clamping member includes a butt joint plate arranged perpendicular to the thickness direction, and an embedding portion extending toward the cover plate body in the thickness direction, and is embedded in the clamping gap through the embedding portion.

9. The battery testing method according to claim 8, characterized in that: The docking plate and the embedded portion are an integrated structure.

10. The battery testing method according to claim 7, wherein: After the battery performance test is completed, separate the test equipment and the battery.

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