Battery pack cover plate and battery pack

Abstract

The utility model provides a battery pack cover plate which comprises a cover plate assembly, and the cover plate assembly comprises upper plastic, an aluminum plate and lower plastic which are sequentially arranged from top to bottom; the pole comprises a main body and an upper skirt edge arranged around the top of the main body, a riveting groove is formed in the top of the upper plastic, the main body penetrates through the cover plate assembly through the riveting groove, the upper skirt edge has a first state and a second state, the upper skirt edge protrudes out of the top of the main body in the first state, and the upper skirt edge protrudes out of the top of the main body in the second state. The upper skirt edge is located in the riveting groove, the top face of the upper skirt edge is lower than the top face of the body, and the upper skirt edge is converted into a second state from a first state through spin riveting. According to the battery pack cover plate, the overall height can be reduced, the occupation of the internal and external height space of the battery pack is reduced, and the energy density of the battery pack is further improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to power battery technical field, concretely relates to a battery pack cover plate and battery pack. BACKGROUND

[0002] With the gradual expansion of the market of the battery cell, the performance requirement of the battery cell gradually increases in the market. In the conventional technology, riveting, injection molding, welding and other methods are often used for battery pack production and processing. This kind of processing method makes the cover plate occupy more height space of the battery pack, limits the height of the battery cell, and further limits the energy density of the battery pack. UTILITY MODEL CONTENTS

[0003] The utility model discloses a battery pack cover plate, which can reduce the overall height, reduce the occupation of the height space inside and outside the battery pack, and further improve the energy density of the battery pack.

[0004] The utility model discloses a battery pack cover plate, which includes a cover plate assembly, an upper plastic, an aluminum plate and a lower plastic arranged in sequence from top to bottom, a pole including a main body and an upper skirt arranged around the top of the main body, a riveting groove is arranged at the top of the upper plastic, the main body is arranged through the cover plate assembly through the riveting groove, the upper skirt has a first state and a second state, in the first state, the upper skirt protrudes from the top of the main body, in the second state, the upper skirt is located in the riveting groove, and the top surface of the upper skirt is lower than the top surface of the main body, the upper skirt is changed from the first state to the second state by riveting.

[0005] The utility model discloses a battery pack cover plate, which includes a cover plate assembly, an upper plastic, an aluminum plate and a lower plastic arranged in sequence from top to bottom, a pole including a main body and an upper skirt arranged around the top of the main body, a riveting groove is arranged at the top of the upper plastic, the main body is arranged through the cover plate assembly through the riveting groove, the upper skirt has a first state and a second state, in the first state, the upper skirt protrudes from the top of the main body, in the second state, the upper skirt is located in the riveting groove, and the top surface of the upper skirt is lower than the top surface of the main body, the upper skirt is changed from the first state to the second state by riveting.

[0006] The utility model discloses a battery pack cover plate, which includes a cover plate assembly, an upper plastic, an aluminum plate and a lower plastic arranged in sequence from top to bottom, a pole including a main body and an upper skirt arranged around the top of the main body, a riveting groove is arranged at the top of the upper plastic, the main body is arranged through the cover plate assembly through the riveting groove, the upper skirt has a first state and a second state, in the first state, the upper skirt protrudes from the top of the main body, in the second state, the upper skirt is located in the riveting groove, and the top surface of the upper skirt is lower than the top surface of the main body, the upper skirt is changed from the first state to the second state by riveting.

[0007] The utility model discloses a battery pack cover plate, which includes a cover plate assembly, an upper plastic, an aluminum plate and a lower plastic arranged in sequence from top to bottom, a pole including a main body and an upper skirt arranged around the top of the main body, a riveting groove is arranged at the top of the upper plastic, the main body is arranged through the cover plate assembly through the riveting groove, the upper skirt has a first state and a second state, in the first state, the upper skirt protrudes from the top of the main body, in the second state, the upper skirt is located in the riveting groove, and the top surface of the upper skirt is lower than the top surface of the main body, the upper skirt is changed from the first state to the second state by riveting.

[0008] The utility model discloses a battery pack cover plate, which includes a cover plate assembly, an upper plastic, an aluminum plate and a lower plastic arranged in sequence from top to bottom, a pole including a main body and an upper skirt arranged around the top of the main body, a riveting groove is arranged at the top of the upper plastic, the main body is arranged through the cover plate assembly through the riveting groove, the upper skirt has a first state and a second state, in the first state, the upper skirt protrudes from the top of the main body, in the second state, the upper skirt is located in the riveting groove, and the top surface of the upper skirt is lower than the top surface of the main body, the upper skirt is changed from the first state to the second state by riveting.

[0009] The utility model discloses a battery pack cover plate, which includes a cover plate assembly, an upper plastic, an aluminum plate and a lower plastic arranged in sequence from top to bottom, a pole including a main body and an upper skirt arranged around the top of the main body, a riveting groove is arranged at the top of the upper plastic, the main body is arranged through the cover plate assembly through the riveting groove, the upper skirt has a first state and a second state, in the first state, the upper skirt protrudes from the top of the main body, in the second state, the upper skirt is located in the riveting groove, and the top surface of the upper skirt is lower than the top surface of the main body, the upper skirt is changed from the first state to the second state by riveting.

[0010] The utility model discloses a better technical scheme: the cover plate assembly is connected to the main body through the sealing ring, and the sealing ring is sleeved on the main body.

[0011] A battery pack cover plate and a battery pack.

[0012] The utility model discloses a battery pack cover plate and battery pack have following beneficial effects:

[0013] In the application, after the pole is fixedly connected with the cover plate assembly through riveting, the upper surface of the upper skirt is lower than the upper surface of the pole, the height between the pole and the aluminum plate after installation is reduced, thereby reducing the external height of the battery pack; the boss is arranged at the bottom of the pole and is connected with the connecting piece through welding, the bottom surface of the connecting piece is flush with the bottom surface of the boss, the connecting height after the pole and the connecting piece are connected is reduced, and the occupation of the internal height space of the battery pack by the pole and the connecting piece is reduced; the utilization rate of the internal and external space of the battery pack is further improved, and the energy density of the battery pack is improved. BRIEF DESCRIPTION OF DRAWINGS

[0014] The accompanying drawings, which are incorporated into and form a part of the specification, illustrate embodiments of the present utility model and, together with the description, serve to explain the principles of the present utility model. In these drawings, similar reference numerals are used to designate similar elements. The drawings in the following description are some embodiments of the present utility model, not all embodiments. For ordinary skilled in the art, other drawings can be obtained according to these drawings without creating labor.

[0015] Figure 1 It is the explosion view of the battery pack cover plate of the utility model embodiment.

[0016] Figure 2 It is the sectional view of the battery pack cover plate of the utility model embodiment.

[0017] Figure 3 It is the utility model embodiment Figure 3 The enlarged view of A in the embodiment of the utility model.

[0018] Figure 4 It is the sectional view of the pole in the first state in the embodiment of the utility model.

[0019] Figure 5 It is the sectional view of the pole in the second state in the embodiment of the utility model.

[0020] In the drawing: 10, pole;11, main body;111, structure groove;12, upper skirt;13, lower skirt;131, boss;21, upper plastic;211, first through hole;212, riveting groove;213, ring table;22, aluminum plate;221, mounting hole;23, lower plastic;231, second through hole;24, sealing ring;25, connecting piece;251, connecting hole. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be described clearly and completely below in combination with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model. It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other in any manner without conflict.

[0022] Please refer to Figures 1 to 5 The battery pack cover plate in the present application comprises a cover plate assembly and a pole 10. The cover plate assembly comprises an upper plastic 21, an aluminum plate 22 and a lower plastic 23 arranged in sequence from top to bottom, and the pole 10 penetrates through the cover plate assembly, and a connecting piece 25 is arranged below the pole 10 to connect the winding core.

[0023] A first through hole 211 is formed in the upper plastic 21, a mounting hole 221 is formed in the aluminum plate 22, and a second through hole 231 is formed in the lower plastic 23. A ring table 213 is arranged at the bottom of the upper plastic 21, the first through hole 211 penetrates through the ring table 213, and the ring table 213 is inserted into the mounting hole 221 to quickly position the upper plastic 21 and the aluminum plate 22. The upper plastic 21, the aluminum plate 22 and the lower plastic 23 are stacked in sequence from top to bottom, and the first through hole 211, the mounting hole 221 and the second through hole 231 are communicated to form a channel, and the main body 11 is installed in the channel.

[0024] The pole 10 comprises a main body 11 and an upper skirt 12 arranged at the top of the main body 11. The main body 11 is inserted into the first through hole 211, and the upper skirt 12 is used to connect the upper plastic 21 to fix the pole 10 and the cover plate assembly. The upper skirt 12 has a first state and a second state. In the first state, the pole 10 is separated from the cover plate assembly, the upper skirt 12 is arranged around the top of the main body 11, and the upper skirt 12 protrudes from the top of the main body 11. The upper skirt 12 is rotated and riveted by a riveting machine to change from the first state to the second state. In the second state, the pole 10 is fixedly connected with the cover plate assembly, the upper skirt 12 is pressed on the upper plastic 21, a riveting groove 212 is formed in the top surface of the upper plastic 21, the riveting groove 212 is communicated with the first through hole 211, and the riveting groove 212 and the first through hole 211 are coaxially arranged, the upper skirt 12 is located in the riveting groove 212, and the top surface of the upper skirt 12 is lower than the top surface of the main body 11 to reduce the height difference between the pole 10 and the cover plate assembly, thereby reducing the external space of the cover plate assembly, compressing the external space of the battery pack, and further improving the energy density of the battery pack.

[0025] In the embodiment, the upper skirt 12 is in the shape of a ring, and has the same outer diameter as the outer diameter of the main body 11 of the pole 10. In the first state, the upper skirt 12 is vertically arranged on the top of the main body 11, and in the second state, the upper skirt 12 is pressed on the upper plastic 21. The connection between the upper skirt 12 and the main body 11 is provided with a structure groove 111, which extends downward from the top surface of the main body 11 and is located inside the upper skirt 12, so as to facilitate the spin riveting of the upper skirt 12 from the first state to the second state. At the same time, since the upper skirt 12 starts to deform at the connection with the main body 11, the structure of the structure groove 111 can make the top surface of the upper skirt 12 after spin riveting slightly lower than the top surface of the main body 11, thereby reducing the height difference between the pole 10 and the cover plate.

[0026] The main body 11 is provided with a lower skirt 13 at the bottom, which is connected with the connecting piece 25 to connect the pole 10 and the battery cell. The lower skirt 13 is arranged around the outer circular surface of the main body 11, and the outer circular surface of the lower skirt 13 protrudes from the outer circular surface of the main body 11, so that the lower skirt 13 forms a platform structure at the bottom of the main body 11. The main body 11 is located in the through hole of the cover plate assembly, and the top surface of the lower skirt 13 abuts against the bottom surface of the lower plastic 23, so as to facilitate the quick positioning of the pole 10 and the lower plastic 23 through the lower skirt 13.

[0027] The bottom of the lower skirt 13 is provided with a boss 131, and the connecting piece 25 is provided with a connecting hole 251, and the boss 131 is arranged in the connecting hole 251, and the bottom surface of the lower skirt 13 abuts against the top surface of the connecting piece 25, so as to facilitate the quick positioning of the pole 10 and the connecting piece 25. The connecting piece 25 is in the shape of a sheet, and the bottom surface of the connecting piece 25 is flush with the bottom surface of the boss 131, thereby reducing the occupation of the pole 10 in the internal height space of the battery pack, and further improving the winding core height and the energy density of the battery pack.

[0028] In order to ensure the sealing connection between the cover plate assembly and the pole 10, the main body 11 is provided with a sealing ring 24, which is clamped between the aluminum plate 22 and the main body 11.

[0029] The application also provides a battery pack comprising the battery pack cover plate of any of the above embodiments.

[0030] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them. Although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A battery pack cover plate, characterized by, Comprising The cover plate assembly comprises an upper plastic (21), an aluminum plate (22) and a lower plastic (23) arranged in sequence from top to bottom; The pole (10) comprises a main body (11) and an upper skirt (12) arranged around the top of the main body (11), the upper plastic (21) is provided with a riveting groove (212), the main body (11) is arranged through the cover plate assembly through the riveting groove (212), the upper skirt (12) has a first state and a second state, in the first state, the upper skirt (12) protrudes from the top of the main body (11), in the second state, the upper skirt (12) is located in the riveting groove (212), and the top surface of the upper skirt (12) is lower than the top surface of the main body (11), the upper skirt (12) is converted from the first state to the second state by spin riveting.

2. The battery pack cover plate of claim 1, wherein, In the first state, the upper skirt (12) is provided with a structure groove (111) at the connection with the main body (11), and the upper skirt (12) is converted from the first state to the second state around the structure groove (111).

3. The battery pack cover plate of claim 2, wherein, The structure groove (111) is located inside the upper skirt (12).

4. The battery pack cover plate of claim 1, wherein, The bottom of the main body (11) is provided with a lower skirt (13) around the ring, the lower skirt (13) is connected to the battery cell through a connecting sheet (25), the connecting sheet (25) is provided with a connecting hole (251), the bottom of the lower skirt (13) is provided with a boss (131), the boss (131) is arranged in the connecting hole (251), and the boss (131) and the connecting hole (251) are welded and fixed.

5. The battery pack cover plate of claim 4, wherein, The lower skirt (13) protrudes from the outer surface of the main body (11), and the top surface of the lower skirt (13) abuts against the bottom surface of the lower plastic (23).

6. The battery pack cover plate of claim 4, wherein, The bottom surface of the lower skirt (13) is flush with the bottom surface of the connecting sheet (25).

7. The battery pack cover plate of claim 1, wherein, The main body (11) is connected to the cover plate assembly through a sealing ring (24), and the sealing ring (24) is sleeved on the outside of the main body (11).

8. A battery pack, characterized by, The battery pack cover plate comprises the battery pack cover plate according to any one of claims 1 to 7.

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