Battery cover plate assembly and battery

Abstract

The utility model discloses a battery cover plate assembly and a battery, the battery cover plate assembly comprises: a pole, the pole is electrically connected with a pole core, and the pole is provided with a first connecting part; the pole body penetrates through the conductive terminal and is electrically connected with the conductive terminal; the cover plate is arranged on the peripheral side of the pole in a sleeving manner; the fastener comprises a limiting part and a second connecting part which are connected with each other, the second connecting part is connected with the first connecting part, and the limiting part is in limiting fit with the conductive terminal so as to connect the pole, the conductive terminal and the cover plate. Wherein the pole post can be firstly electrically connected with the tab, and the pole core is connected with the pole post, the conductive terminal and the cover plate through the fastener after entering the shell, so that the battery space is saved, and the structure is suitable for structures such as a space-ring-free battery cell, a tab-side battery cell and the like.

Description

TECHNICAL FIELD

[0001] The utility model relates to battery technology field especially is related to a battery cover plate subassembly and battery. BACKGROUND

[0002] With the continuous development of new energy technology, electric vehicles are used more and more widely, and the battery, as a power element of the electric vehicle, affects the performance of the electric vehicle. The battery generally includes a top cover assembly, and the electric energy in the battery is transmitted to the outside through the pole column of the top cover assembly, thereby realizing the transmission of electric energy. The cover plate of the power battery has various types, and the cover plate structure type of riveting the pole column is one of the most common structures. The conventional pole column riveting structure is composed of an aluminum block, a pole column, a pole column insulating piece, a cover plate insulating piece, sealing rubber, a cover plate single piece, and a lead-out sheet, the upper part of the pole column is connected with the aluminum block, and the lower part is connected with the lead-out sheet, thereby realizing the current conduction effect of the lead-out sheet and the aluminum block.

[0003] The pole core needs a long tab length to be welded with the current lead-out sheet after being put into the shell (integrated with the cover plate and other components), and this part of the tab will still waste the space of the pole core after the cover plate and the shell are assembled. Moreover, for the no-separator cell and the pole tab side cell design, the pole core is generally welded with the current lead-out sheet before being put into the shell. SUMMARY

[0004] The utility model aims at solving one of the technical problems existing in the prior art. To this end, the utility model provides a battery cover plate subassembly, the pole column can be electrically connected with the pole tab first, and the pole core is connected with the pole column, the conductive terminal and the cover plate through the fastener after being put into the shell, thereby saving the battery space and being suitable for the no-separator cell and the pole tab side cell structure.

[0005] The utility model further provides a battery cover plate subassembly.

[0006] According to the battery cover plate subassembly provided by the utility model, the pole column can be electrically connected with the pole tab first, and the pole core is connected with the pole column, the conductive terminal and the cover plate through the fastener after being put into the shell, thereby saving the battery space and being suitable for the no-separator cell and the pole tab side cell structure.

[0007] According to the battery cover plate subassembly provided by the utility model, the pole column can be electrically connected with the pole tab first, and the pole core is connected with the pole column, the conductive terminal and the cover plate through the fastener after being put into the shell, thereby saving the battery space and being suitable for the no-separator cell and the pole tab side cell structure.

[0008] According to some embodiments of the present application, the first connecting part is provided with an internal thread, the second connecting part is provided with an external thread, and the internal thread is threadedly connected with the external thread.

[0009] According to some embodiments of the present application, the battery cover plate assembly further comprises a first insulating part, which is clamped between the conductive terminal and the cover plate, and the pole passes through the first insulating part and is electrically connected with the conductive terminal.

[0010] According to some embodiments of the present application, the cover plate is provided with a first perforation, the first perforation is provided with a first limiting step at the periphery, and the first insulating part is installed on the first limiting step.

[0011] According to some embodiments of the present application, the battery cover plate assembly further comprises a second insulating part, which is clamped between the cover plate and the pole.

[0012] According to some embodiments of the present application, the battery cover plate assembly further comprises a first spacer, which is sleeved on the outer periphery of the cover plate, the second insulating part and the pole.

[0013] According to some embodiments of the present application, the pole comprises a pole body and a conductive supporting plate, the pole body is supported on the conductive supporting plate, the conductive supporting plate is electrically connected with the pole core, the pole body is electrically connected with the conductive terminal, and the cover plate is located between the conductive supporting plate and the conductive terminal.

[0014] According to some embodiments of the present application, the battery cover plate assembly further comprises a second spacer, which comprises a first part, a second part and a third part, the first part is clamped between the cover plate and the pole body, the second part is clamped between the cover plate and the conductive supporting plate, and the third part is sleeved on the outer periphery of the cover plate, the second part and the conductive supporting plate.

[0015] According to some embodiments of the present application, the conductive terminal is provided with a second perforation and a second limiting step, the pole passes through the second perforation and is electrically connected with the conductive terminal, the second limiting step is located at the outer edge of the second perforation, and the limiting part is limitedly matched with the second limiting step.

[0016] The battery according to the second aspect of the present application comprises a shell, a pole core installed in the shell, and the battery cover plate assembly, wherein the cover plate is covered on the shell.

[0017] Additional aspects and advantages of the present application will be given in part in the following description, will become apparent from the following description, or will be learned by practice of the present application. BRIEF DESCRIPTION OF DRAWINGS

[0018] The above and / or additional aspects and advantages of the present utility model will become apparent and more readily appreciated from the following description of the embodiments, taken in conjunction with the references to the following drawings of which:

[0019] Figure 1 is a connection schematic diagram of the fastener and the battery cover plate assembly according to the embodiment of the present utility model;

[0020] Figure 2 is a connection schematic diagram of the battery cover plate assembly, the shell and the tab according to the embodiment of the present utility model;

[0021] Figure 3 is an exploded view of the conductive terminal, the pole and the fastener according to the embodiment of the present utility model;

[0022] Figure 4 is a connection schematic diagram of the conductive terminal and the pole according to the embodiment of the present utility model;

[0023] Figure 5 is a sectional view of the battery cover plate assembly when the fastener is assembled according to the embodiment of the present utility model;

[0024] Figure 6 is a sectional view of the battery cover plate assembly when the fastener is assembled according to the embodiment of the present utility model;

[0025] Figure 7 is a sectional view of the second spacer ring, the cover plate, the conductive terminal and the pole according to the embodiment of the present utility model.

[0026] Reference signs:

[0027] 100, battery cover plate assembly;

[0028] 11, lead-out sheet;12, pole;121, first connecting part;122, internal thread;123, pole body;124, conductive supporting plate;125, positioning surface;

[0029] 21, conductive terminal;211, second through hole;212, second limiting step;22, cover plate;221, first limiting step;23, first insulating part;24, second insulating part;25, first spacer ring;26, second spacer ring;261, first part;262, second part;263, third part;

[0030] 30, fastener;31, limiting part;32, second connecting part;33, external thread;

[0031] 200, tab. DETAILED DESCRIPTION

[0032] The embodiments of the present invention are described in detail below. The embodiments described with reference to the accompanying drawings are exemplary. The embodiments of the present invention are described in detail below.

[0033] The following is for reference. Figures 1-7 The present invention describes a battery cover assembly 100 according to an embodiment of the present invention, and also proposes a battery including the battery cover assembly 100 described above.

[0034] Combination Figures 3-7 As shown, the battery cover assembly 100 includes: a terminal post 12, a conductive terminal 21, and a cover plate 22. The terminal post 12 is used for electrical connection with the electrode core, and the conductive terminal 21 is used for electrical connection with external components. The terminal post 12 is electrically connected to the electrode core and the conductive terminal 21, thereby transmitting the electrical energy in the battery to the outside through the terminal post 12, thus realizing the transmission of electrical energy.

[0035] like Figures 5-7 As shown, the battery cover assembly 100 also includes a lead-out piece 11, one side of which is electrically connected to the electrode core, and the other side of which is electrically connected to the terminal post 12.

[0036] The cover plate 22 is fitted around the periphery of the electrode post 12. After the electrode core is inserted into the housing, the cover plate 22 is connected to the housing to fix the electrode core inside the housing. The electrode post 12 passes through the cover plate 22 and is electrically connected to the conductive terminal 21, which facilitates the electrical connection between the electrode core and external components to realize the transmission of electrical energy.

[0037] like Figure 3 and Figure 4 As shown, the pole post 12 is provided with a first connecting part 121, which is located on the side of the pole post 12 away from the pole core. The cover plate 22 assembly also includes a fastener 30, which includes a limiting part 31 and a second connecting part 32 that are connected to each other, and the second connecting part 32 is connected to the first connecting part 121.

[0038] The limiting part 31 engages with the conductive terminal 21, and the cover plate 22 is sandwiched between the conductive terminal 21 and the conductive support plate 124 to connect the electrode post 12, the conductive terminal 21, and the cover plate 22. Specifically, the limiting part 31 abuts against the conductive terminal 21, and the limiting part 31 braces the conductive terminal 21, connecting the conductive terminal 21, the cover plate 22, and the electrode post 12 into a whole. Assembly does not need to be completed before the electrode post 12 is connected to the electrode tab 200; that is, the electrode core can be pre-welded to the electrode post 12 and the electrode tab 200 before entering the housing.

[0039] In the embodiment of the utility model, the pole post 12 can be welded with the pole core first, and then the cover plate 22 is connected with the pole post 12, the length of the lug 200 on the pole core is shortened, and the space in the battery is saved; since the assembly of the cover plate 22 and other parts is not needed before the lug 200 is welded with the pole core, the situation that the lug 200 cannot extend out of the shell and be welded with the cover plate 22 when the shell and the cover plate 22 are assembled is applicable, and the structure of the pole core without the spacer ring and the structure of the pole core with the lug 200 arranged on the side are also applicable.

[0040] The pole post 12 is electrically connected with the pole core through the lead-out sheet 11, the lead-out sheet 11 and the lug 200 on the pole core are welded before the pole core enters the shell, the lug 200 is bent after the lead-out sheet 11 and the lug 200 are welded, and then the pole core enters the shell. In this way, the lead-out sheet 11 and the pole post 12 are welded before entering the shell, and the length of the lug 200 can be significantly shortened.

[0041] In addition, the pole post 12 and the lead-out sheet 11 need to be welded together in advance. After the pole core and the lead-out sheet 11 are welded together and enter the shell, it is difficult to weld the pole post 12 and the lead-out sheet 11.

[0042] As shown in Figure 3 and Figure 5 , the first connecting part 121 is provided with an internal thread 122, the second connecting part 32 is provided with an external thread 33, and the internal thread 122 is screwed with the external thread 33. Specifically, the internal thread 122 is arranged on the side of the pole post 12 away from the pole core, the external thread 33 is arranged on the outer circumferential side of the second connecting part 32, and the external thread 33 is screwed with the internal thread 122. The fastener 30 can be screwed into the pole post 12 to realize the fixed connection of the fastener 30 and the pole post 12. After the cover plate 22, the conductive terminal 21 and the pole post 12 are assembled, the fastener 30 is screwed in, and the external thread 33 is screwed with the internal thread 122.

[0043] After the pole core (at this time, the pole core is connected with the lead-out sheet 11 and the pole post 12) enters the shell, the cover plate 22, the conductive terminal 21 and other components are sequentially assembled with the pole post 12, then the fastener 30 is screwed in, and the assembly of the whole battery is completed. Finally, the cover plate 22 and the shell are welded.

[0044] As shown in Figures 5-7 , the battery cover plate assembly 100 further comprises: a first insulating piece 23, the first insulating piece 23 is clamped between the conductive terminal 21 and the cover plate 22, and the pole post 12 passes through the first insulating piece 23 and is electrically connected with the conductive terminal 21. Specifically, the first insulating piece 23 is arranged between the cover plate 22 and the conductive terminal 21 to avoid the electrical connection between the conductive terminal 21 and the cover plate 22, which may cause the leakage phenomenon of the battery after assembly. The first insulating piece 23 can be insulating rubber.

[0045] As shown in Figure 5 and Figure 6As shown in the drawings, the cover plate 22 is provided with a first through hole, and a first limiting step 221 is arranged on the periphery of the first through hole. The first insulating piece 23 is installed on the first limiting step 221. Specifically, the cover plate 22 is provided with a first through hole, which is matched with the pole body 123. The pole body 123 is electrically connected with the conductive terminal 21 through the first through hole. The first limiting step 221 is arranged on the periphery of the first through hole, and the first insulating piece 23 is arranged on the first limiting step 221. The first limiting step 221 plays a role of positioning and limiting the first insulating piece 23. The first insulating piece 23 is clamped between the first limiting step 221 and the conductive terminal 21.

[0046] Further, the battery cover plate assembly 100 further comprises a second insulating piece 24, which is clamped between the cover plate 22 and the pole 12. Specifically, the second insulating piece 24 is arranged between the cover plate 22 and the pole 12, so as to avoid the electrical connection between the pole 12 and the cover plate 22, thereby preventing the battery from leaking after assembly. The second insulating piece 24 can be insulating rubber.

[0047] As shown in the drawings, Figure 5 and Figure 6 The battery cover plate assembly 100 further comprises a first spacer 25, which is sleeved on the outer periphery of the cover plate 22, the second insulating piece 24 and the conductive supporting plate 124. Specifically, the first spacer 25 is wrapped on the outer periphery of the cover plate 22, the second insulating piece 24 and the conductive supporting plate 124, so as to ensure the insulation performance of the cover plate 22 assembly and the shell.

[0048] As shown in the drawings, Figure 3 and Figure 4 The pole 12 comprises a pole body 123 and a conductive supporting plate 124. The pole body 123 is supported on the conductive supporting plate 124. The conductive supporting plate 124 is connected with the lead-out sheet 11. The pole body 123 passes through the conductive terminal 21, and the pole body 123 is electrically connected with the conductive terminal 21. That is, the conductive supporting plate 124 is connected with the pole body 123. The conductive supporting plate 124 is electrically connected with the lead-out sheet 11. The pole body 123 is electrically connected with the conductive terminal 21. Therefore, the pole 12 connects the lead-out sheet 11 and the conductive terminal 21. The lead-out sheet 11 is used to be electrically connected with the pole core. The conductive terminal 21 is used to be electrically connected with external components. Therefore, the pole core is electrically connected with the external components, so as to realize the transmission of electric energy.

[0049] As shown in the drawings, Figure 7As shown, the battery cover plate assembly 100 further comprises a second spacer ring 26, which comprises a first part 261, a second part 262 and a third part 263. The first part 261 is clamped between the cover plate 22 and the pole body 123, the second part 262 is clamped between the cover plate 22 and the conductive bracket 124, and the third part 263 is sleeved on the outer periphery of the cover plate 22, the second part 262 and the conductive bracket 124. Specifically, the first part 261 is arranged between the cover plate 22 and the pole body 123 to ensure insulation between the cover plate 22 and the pole body 123; the second part 262 is clamped between the cover plate 22 and the conductive bracket 124 to ensure insulation between the cover plate 22 and the conductive bracket 124; and the third part 263 is sleeved on the outer periphery of the cover plate 22, the second part 262 and the conductive bracket 124 to ensure insulation between the cover plate 22, the second part 262, the conductive bracket 124 and the shell.

[0050] By arranging the second spacer ring 26 and canceling the second insulating part 24, the deformation performance of the second spacer ring 26 is weaker than that of the insulating rubber, so as to accurately control the compression amount of the first insulating part 23, and ensure the sealing performance of the first insulating part 23 while avoiding excessive compression of the first insulating part 23 leading to failure.

[0051] As shown in Figure 3 The conductive terminal 21 is provided with a second through hole 211 and a second limiting step 212. The pole body 123 passes through the second through hole 211 to be electrically connected with the conductive terminal 21, and the second limiting step 212 is located at the outer edge of the second through hole 211. The limiting part 31 is limitedly matched with the second limiting step 212. Specifically, the second through hole 211 is matched with the pole body 123, and the pole body 123 passes through the second through hole 211 to be electrically connected with the conductive terminal 21.

[0052] As shown in Figure 5 When the fastener 30 is not screwed in, the upper edge of the second through hole 211 is higher than the upper edge of the groove. During the process of screwing the fastener 30 into the pole 12, the limiting part 31 is limitedly matched with the second limiting step 212. The lower surface of the limiting part 31 presses the surface of the second limiting step 212, and the conductive terminal 21 is subjected to a downward force, so as to compress and deform the first insulating part 23 and the second insulating part 24 until the upper edge of the second through hole 211 is flush with the upper edge of the groove (as shown in Figure 6 As shown in

[0053] As shown in Figure 4As shown, the side wall of the pole body 123 is provided with a positioning surface 125, which is in a planar shape, and is configured to limit the pole body 123. In this way, the pole 12 is less likely to rotate when being assembled, and the assembly process is more convenient. The pole 12 can be assembled in the first via hole, and a limiting surface matched with the positioning surface 125 can be arranged on the hole wall of the first via hole. Thus, through the matching relationship between the positioning surface 125 and the limiting surface, the pole 12 is less likely to rotate during assembly.

[0054] In some embodiments, the poles 12 are two, and the conductive terminals 21 are two, and the two conductive terminals 21 are respectively electrically connected with the two poles 12. Specifically, the poles 12 include a positive pole 12 and a negative pole 12, and the conductive terminals 21 are two, one of which is electrically connected with the positive pole 12, and the other of which is electrically connected with the negative pole 12, so as to form a loop with external components, thereby transmitting the electric energy in the battery to the outside through the poles 12, and realizing the transmission of electric energy.

[0055] In some other embodiments, the poles 12 are two, and the conductive terminals 21 are one, and the two poles 12 both pass through the conductive terminal 21. That is, the poles 12 are two, including a positive pole and a negative pole 12, and the conductive terminals 21 are one, and the positive pole 12 and the negative pole 12 both pass through the conductive terminal 21 and are electrically connected with the conductive terminal 21, so as to transmit the electric energy in the battery to the outside through the poles 12, and realize the transmission of electric energy.

[0056] According to the second aspect of the utility model, the battery includes: a pole core, a shell and a battery cover plate assembly 100, the pole core is installed in the shell, the cover plate 22 is covered on the shell, and the pole core is electrically connected with the lead-out sheet 11. The lead-out sheet 11 is electrically connected with the conductive terminal 21 through the pole 12, the conductive terminal 21 is connected with external components, forming a complete loop, thereby transmitting the electric energy in the battery to the outside, realizing the transmission of electric energy.

[0057] In the description of the utility model, it is to be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, and therefore cannot be understood as limiting the indicated device or element to have a specific orientation, to be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the utility model.

[0058] In the description of the present specification, the description referring to the terms "one embodiment", "some embodiments", "illustrative embodiment", "example", "specific example", or "some examples" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily mean the same embodiment or example.

[0059] Although the embodiments of the present application have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made thereto without departing from the principles and spirit of the present application, and the scope of the present application is defined by the claims and their equivalents.

Claims

1. A battery cover plate assembly, characterized by, The utility model relates to a pole terminal structure, including: a pole (12) electrically connected with a pole core, the pole (12) is provided with a first connecting part (121) on it; a conductive terminal (21) through which the pole (12) passes and is electrically connected with the conductive terminal (21); a cover plate (22) sleeved on the circumferential side of the pole (12); a fastener (30) including a limiting part (31) and a second connecting part (32) connected with each other, the second connecting part (32) is connected with the first connecting part (121), and the limiting part (31) is limitedly matched with the conductive terminal (21) to connect the pole (12), the conductive terminal (21) and the cover plate (22).

2. The battery cover plate assembly of claim 1, wherein, The first connecting part (121) is provided with an internal thread (122), the second connecting part (32) is provided with an external thread (33), and the internal thread (122) is screwed with the external thread (33).

3. The battery cover plate assembly of claim 1, wherein, Further including: a first insulating piece (23) clamped between the conductive terminal (21) and the cover plate (22), and the pole (12) is electrically connected with the conductive terminal (21) through the first insulating piece (23).

4. The battery cover plate assembly of claim 3, wherein, The cover plate (22) is provided with a first perforation, and the circumferential side of the first perforation is provided with a first limiting step (221), and the first insulating piece (23) is installed on the first limiting step (221).

5. The battery cover plate assembly of claim 3, wherein, Further including: a second insulating piece (24) clamped between the cover plate (22) and the pole (12).

6. The battery cover plate assembly of claim 5, wherein, Further including: a first spacer ring (25) sleeved on the outer periphery of the cover plate (22), the second insulating piece (24) and the pole (12).

7. The battery cover plate assembly of claim 1, wherein, The pole (12) includes a pole body (123) supported on a conductive supporting plate (124), the conductive supporting plate (124) is electrically connected with the pole core, the pole body (123) is electrically connected with the conductive terminal (21), and the cover plate (22) is located between the conductive supporting plate (124) and the conductive terminal (21).

8. The battery cover plate assembly of claim 7, wherein, Further including: a second spacer ring (26) including a first part (261), a second part (262) and a third part (263), the first part (261) is clamped between the cover plate (22) and the pole body (123), the second part (262) is clamped between the cover plate (22) and the conductive supporting plate (124), and the third part (263) is sleeved on the outer periphery of the cover plate (22), the second part (262) and the conductive supporting plate (124).

9. The battery cover plate assembly of claim 1, wherein, The conductive terminal (21) is provided with a second through hole (211) and a second limiting step (212), the pole (12) passes through the second through hole (211) and is electrically connected with the conductive terminal (21), and the second limiting step (212) is located at the outer edge of the second through hole (211), and the limiting part (31) is limitedly matched with the second limiting step (212).

10. A battery, characterized by Comprising: A shell, a pole core installed in the shell, and a battery cover plate assembly (100) as claimed in any one of claims 1-9, wherein the cover plate (22) covers the shell.

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