Battery shell and battery

Abstract

The utility model relates to the technical field of new energy, particularly provides a battery shell and a battery, and aims to solve the problem that the sealing effect of a pole component of the conventional battery is not ideal. Therefore, the battery shell provided by the utility model comprises a shell and a pole component, the shell comprises a first wall part, the first wall part is provided with a first through hole, the pole component comprises a conducting strip, a sealing ring, a reinforcing piece and a first insulating piece, the first insulating piece penetrates through the first through hole, the reinforcing piece is fixedly connected with the first wall part, a first surface of the sealing ring is propped against the conducting strip, and a second surface of the sealing ring is propped against the conducting strip. The second surface of the sealing ring abuts against the first insulating part, the second surface is provided with a step surface, and the step surface abuts against the reinforcing part. The sealing ring is provided with the step surface abutting against the reinforcing piece, so that the reinforcing piece can be effectively sealed, the first surface and the second surface are matched to realize sealing between the conducting strip and the first insulating piece, and meanwhile, the supporting and fixing effects of the reinforcing piece on the first wall part can be ensured.

Description

TECHNICAL FIELD

[0001] The utility model relates to new energy technology field, concretely provides a battery case and battery. BACKGROUND

[0002] With the development of new energy technology, lithium battery has been widely applied, but also brought a lot of problems, which include the sealing problem of pole assembly.

[0003] The traditional lithium battery usually includes shell and pole, because the wall thickness of shell is thin, when setting pole on shell, shell is easy to deform, for this, need to set the position of pole on shell to set reinforcing plate to enhance the support and fixed effect of shell, therefore, pole needs to pass through shell, reinforcing plate, insulating piece between pole and shell. However, how to realize effective sealing between pole, reinforcing plate and insulating piece becomes the technical problem that is urgently needed to solve at present.

[0004] Therefore, the prior art needs a new technical solution to solve the above problems. UTILITY MODEL CONTENT

[0005] The utility model aims at solving the above technical problem, that is, solving the sealing problem of pole assembly of the existing battery.

[0006] In the first aspect, the utility model provides a battery shell, including shell, pole assembly, the shell includes first wall part, the first wall part is equipped with first through hole, the pole assembly includes the electrically conductive sheet in the shell inside, sealing ring, reinforcing piece, the first insulating piece in the shell outside, the first insulating piece passes through the first through hole, the reinforcing piece is fixedly connected with the first wall part, the first surface of the sealing ring is abutted to the electrically conductive sheet, the second surface of the sealing ring is abutted to the first insulating piece, the second surface is equipped with step face, and the step face is abutbed to the reinforcing piece.

[0007] In the above technical scheme, the step face on the sealing ring is abutted to the reinforcing piece, so that not only the effective sealing of the reinforcing piece can be realized, but also the sealing between the electrically conductive sheet and the first insulating piece can be realized by cooperating the first surface and the second surface, and the support and fixed effect of the reinforcing piece on the first wall part can be ensured, and the stability of the structure can be ensured.

[0008] In the preferred technical scheme of the above battery cell, the electrically conductive sheet is provided with a pole, and the pole passes through the first through hole.

[0009] In the preferred technical scheme of the above battery cell, the reinforcing piece is provided with a second through hole, and the pole and the first insulating piece pass through the second through hole.

[0010] In the preferred technical solution of the above battery cell, the pole post assembly further comprises an electrically-conductive block, and the pole post is fixedly connected with the electrically-conductive block.

[0011] In the preferred technical solution of the above battery cell, the first insulating member is arranged between the electrically-conductive block and the first wall portion.

[0012] In the preferred technical solution of the above battery cell, the pole post assembly further comprises a second insulating member, and the second insulating member is arranged between the reinforcing member and the electrically-conductive sheet.

[0013] In the preferred technical solution of the above battery cell, the second insulating member is provided with a third through hole, and the pole post passes through the third through hole.

[0014] In the preferred technical solution of the above battery cell, the sealing ring is accommodated in the third through hole.

[0015] In the preferred technical solution of the above battery cell, an outer circumferential surface of the sealing ring abuts against an inner circumferential surface of the third through hole, and the outer circumferential surface of the sealing ring and the inner circumferential surface of the third through hole are in a stepped shape.

[0016] In a second aspect, the utility model also provides a battery, the battery includes any one of the battery shell, the battery cell of accommodating in the battery shell, the electrically-conductive sheet is connected with the pole lug of the battery cell. BRIEF DESCRIPTION OF DRAWINGS

[0017] The preferred embodiments of the utility model are described below in combination with the drawings, and the drawings are as follows:

[0018] Figure 1 is a perspective view of one embodiment of the battery shell of the utility model;

[0019] Figure 2 is Figure 2 is an exploded view of the battery shell of the utility model;

[0020] Figure 3 is Figure 1 is a left view of the battery shell of the utility model;

[0021] Figure 4 is Figure 3 is a sectional view along line A-A of the battery shell of the utility model;

[0022] Figure 5 is Figure 1 is a front view of the sealing ring of the battery shell of the utility model;

[0023] Figure 6 is a perspective view of the battery of the utility model;

[0024] Figure 7is Figure 6 The utility model provides a battery's B part's partial close -up view.

[0025] List of reference signs:

[0026] 100, battery shell; 1, shell; 11, bottom; 12, first wall part; 121, first through hole; 13, second wall part; 14, accommodating cavity; 2, pole post assembly; 21, conductive sheet; 22, second insulating piece; 221, third through hole; 23, reinforcing piece; 231, second through hole; 24, sealing ring; 241, first surface; 242, step surface; 243, second surface; 244, outer peripheral surface; 25, first insulating piece; 26, conductive block; 27, pole post; 271, flange; 3, battery cell; 31, tab. DETAILED DESCRIPTION

[0027] The preferred embodiments of the utility model are described below with reference to the drawings. Those skilled in the art should understand that these embodiments are only used to explain the technical principles of the utility model, and are not intended to limit the protection scope of the utility model.

[0028] It should be noted that in the description of the utility model, the terms "inner", "outer", "upper", "lower", "top", "bottom", "left", "right", "front", "back" and other terms indicating direction or positional relationship are based on the direction or positional relationship shown in the drawings, which is only for the convenience of description, and does not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the utility model. In addition, the terms "first" and "second" are only for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0029] In addition, it should also be noted that in the description of the utility model, unless otherwise explicitly specified and limited, the terms "set", "connected", "mounted" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrally connected. For those skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0030] In one embodiment, as Figures 1 to 5 shown, a battery shell 100 of the utility model comprises a shell 1 and a pole post assembly 2.

[0031] Preferably, the shell 1 can be a cuboid, or a cylinder or other geometric body, and the user can select and set as needed, which is not specifically limited here.

[0032] More preferably, the shell 1 can be an aluminum shell, or a steel shell, or an aluminum-plastic film, or other materials, which can be selected by users as needed, and are not specifically limited herein.

[0033] Further preferably, the pole assembly 2 is arranged on the shell 1, and is used to transmit the electric energy of the battery to the outside, so as to meet the needs of the electric device.

[0034] Further preferably, the pole assembly 2 penetrates the inner and outer surfaces of the shell 1, one end of the pole assembly 2 is used to be electrically connected with the battery cell 3 in the shell 1, and the other end of the pole assembly 1 is used to be connected with the electric device outside, so as to realize the output of the electric energy.

[0035] Further, the pole assembly 2 and the shell 1 are in insulating and sealing connection, so as to prevent the electric energy from being conducted to the shell 1, and prevent the electrolyte in the shell 1 from leaking.

[0036] In an embodiment, the shell 1 comprises a first wall portion 12, which is provided with a first through hole 121, as shown in Figure 2

[0037] Preferably, the shell 1 comprises a bottom portion 11, a first wall portion 12 arranged at both ends of the bottom portion 11 in a first direction, and a second wall portion 13 arranged at both ends of the bottom portion 11 in a second direction, the two first wall portions 12 and the two second wall portions 13 are arranged in a spaced manner and are sequentially connected in a head-to-tail manner, so as to form a receiving cavity 14 for receiving the battery cell 3 through the bottom portion 11, the first wall portion 12 and the second wall portion 13. Further, the bottom portion 11, the first wall portion 12 and the second wall portion 13 can be integrally formed, or can be fixed by welding, etc., which can be selected by users as needed, and are not specifically limited herein.

[0038] It should be noted that the first direction is the length direction of the battery shell 100, and the second direction is the width direction of the battery shell 100. In other embodiments, the first direction can also be the width direction and the second direction can also be the length direction, etc., which can be selected by users as needed, and are not specifically limited herein.

[0039] More preferably, the first through hole 121 penetrates the inner and outer surfaces of the first wall portion 12, and can be circular, or elliptical, or polygonal, etc., and the specific shape can be selected as needed, and is not specifically limited herein.

[0040] Further preferably, the first through hole 121 can be arranged at the central region of the first wall portion 12, or can be arranged at one side in the length direction or one side in the width direction of the first wall portion 12, etc., which can be selected by users as needed, and is not specifically limited herein.

[0041] ​Further preferably, the first through hole 121 can be provided with one, two or more, which can be selected by the user as needed, and is not specifically limited here.

[0042] In an embodiment, the pole assembly 2 comprises a conductive sheet 21 inside the shell 1, a sealing ring 24, a reinforcing member 23, a first insulating member 25 outside the shell 1.

[0043] Preferably, the conductive sheet 21 is provided inside the shell 1 and is used to electrically connect with the tab 31 of the battery cell 3. The conductive sheet 21 can be flat or bent, which can be selected by the user as needed, and is not specifically limited here.

[0044] More preferably, the reinforcing member 23 is provided inside the shell 1, and the reinforcing member 23 is used to structurally reinforce the shell 1 to prevent the shell 1 from bending and deforming. Further, the reinforcing member 23 can be an aluminum plate or a steel plate, and the material thereof can be selected as needed, and is not specifically limited here.

[0045] Further preferably, the sealing ring 23 is between the conductive sheet and the reinforcing member 23 to achieve sealing therebetween.

[0046] Further preferably, the first insulating member 25 is outside the shell 1 to insulate the outer surface of the first wall portion 12.

[0047] In an embodiment, the first insulating member 25 passes through the first through hole 121, and the reinforcing member 23 is fixedly connected with the first wall portion 12, as shown in Figure 2 and Figure 4 .

[0048] Preferably, the first insulating member 25 passes through the first through hole 121, so that one end of the first insulating member 25 is outside the shell 1 and the other end is inside the shell 1, to insulate the inner circumferential surface of the first through hole 121.

[0049] More preferably, the reinforcing member 23 is provided on the inner surface of the first wall portion 12 and is fixedly connected with the first wall portion 12, such as by welding, so as to not only achieve the fixed connection of the reinforcing member 23 with the first wall portion 12, but also achieve the sealing therebetween to prevent the electrolyte from passing through the gap between the reinforcing member 23 and the first wall portion 12, and the fixed sealing effect is significant.

[0050] In an embodiment, the first surface 241 of the sealing ring 24 abuts against the conductive sheet 21, the second surface 243 of the sealing ring 24 abuts against the first insulating member 25, the second surface 243 is provided with a stepped surface 242, and the stepped surface 242 abuts against the reinforcing member 23, as shown inFigure 4 as shown.

[0051] Preferably, the sealing ring 24 comprises a first surface 241 located at one end in the axial direction, a second surface 243 located at the other end, and a stepped surface 242 located between the first surface 241 and the second surface 243 in the axial direction.

[0052] More preferably, the first surface 241 abuts against the conductive sheet 21, thereby achieving sealing between the sealing ring 24 and the conductive sheet 21 and preventing electrolyte or gas from passing through the gap between the conductive sheet 21 and the sealing ring 24.

[0053] Still more preferably, the second surface 243 abuts against the first insulating member 25, specifically, the end surface of the first insulating member 25 extending into the housing 1, thereby achieving sealing between the sealing ring 24 and the first insulating member 25 and effectively preventing electrolyte or gas from passing through.

[0054] Further preferably, the stepped surface 242 abuts against the reinforcing member 23, thereby achieving sealing between the reinforcing member 23 and the sealing ring 24 and effectively preventing electrolyte or gas from passing through.

[0055] It should be noted that the provision of the stepped surface 242 allows one sealing ring 24 to simultaneously abut against the first insulating member 25, the reinforcing member 23, and the conductive sheet 21, thereby achieving effective sealing among the three and effectively preventing leakage of electrolyte in the housing 1, ensuring the safety and stability of the battery.

[0056] In one embodiment, the conductive sheet 21 is provided with a pole 27, and the pole 27 passes through the first through hole 121, as shown in Figure 2 and Figure 4 .

[0057] Preferably, the pole 27 can be a cylinder, or other geometric bodies, etc., which can be selected and arranged by the user as needed, and is not specifically limited here.

[0058] More preferably, the pole 27 can be made of aluminum, or copper or other conductive materials, etc., which can be selected and arranged by the user as needed, and is not specifically limited here.

[0059] Still more preferably, the pole 27 is arranged on the conductive sheet 21, and the pole 27 and the conductive sheet 21 can be fixed by welding or the like, or can be integrally formed.

[0060] Further preferably, the pole 27 passes through the first through hole 21, so that the pole 27 can transmit electrical energy to the outside to meet the needs of the electrical equipment.

[0061] Further, the pole 27 penetrates the first insulating member 25, so that the pole 27 is insulated from the first wall 12, and the electric conduction to the first wall 12 is prevented.

[0062] Further, the pole 27 penetrates the sealing ring 24, so that the sealing ring 24 is fixed between the pole 27 and the conductive sheet 21 and the reinforcing member 23, and the fixing effect is obvious. The inner circumferential surface of the sealing ring 24 can or can not abut on the outer circumferential surface of the pole 27, and the user can select the setting according to the need, which is not specifically limited here.

[0063] In an embodiment, the reinforcing member 23 is provided with a second through hole 231, and the pole 27 and the first insulating member 25 penetrate the second through hole 231, as shown in Figure 2 and Figure 4 .

[0064] Preferably, the second through hole 231 penetrates both end surfaces in the thickness direction of the reinforcing member 23, and the second through hole 231 can be circular, oval or other geometric bodies, and the user can select the setting according to the need, which is not specifically limited here.

[0065] More preferably, the pole 27 penetrates the second through hole 231, so that one end thereof can extend to the outside of the shell 1, and the electric connection with the external electrical equipment is realized.

[0066] More preferably, the first insulating member 25 penetrates the second through hole 231, so that one end thereof can extend into the inside of the shell 1 and abut on the second surface 243 of the sealing ring 24, and the sealing between the sealing ring 24 and the first insulating member 25 is realized.

[0067] In an embodiment, the pole assembly 2 further comprises a conductive block 26, and the pole 27 is fixedly connected with the conductive block 26, as shown in Figure 4 .

[0068] Preferably, the conductive block 26 can be circular ring-shaped or strip-shaped, and the specific shape can be set according to the need, which is not specifically limited here.

[0069] More preferably, the conductive block 26 is arranged outside the shell 1 and opposite to the first through hole 121, so that the electric connection with the pole 27 is facilitated.

[0070] Further preferably, the pole 27 penetrates the conductive block 26 and is fixedly connected therewith, such as riveting, so that the stable connection of the two is realized. Specifically, the end portion of the pole 27 is provided with a flange 271, and the flange 271 is pressed on the conductive block 25 by riveting, so that the stable connection of the two is realized.

[0071] Further preferably, the material of the conductive block 26 can be the same as or different from the material of the pole 27, and the user can select and set as required, which is not specifically limited herein.

[0072] In an embodiment, the first insulating member 25 is arranged between the conductive block 26 and the first wall portion 12.

[0073] Preferably, the first insulating member 25 is arranged between the conductive block 26 and the outer surface of the first wall portion 12, thereby achieving insulation between the conductive block 26 and the first wall portion 12 and preventing electrical conduction to the shell 1.

[0074] More preferably, the first insulating member 25 covers the conductive block 26, thereby achieving comprehensive insulation effect of the conductive block 26.

[0075] Further preferably, the end surface of the first insulating member 25 away from the first wall portion 12 is between the end surface of the conductive block 26 away from the first wall portion 12 and the first wall portion 12, so that the end surface of the conductive block 26 away from the first wall portion 12 is protrudingly arranged from the first insulating member 25, so as to achieve electrical connection with the external electrical equipment.

[0076] In an embodiment, the pole assembly 2 further comprises a second insulating member 22, which is arranged between the reinforcing member 23 and the conductive sheet 21, as shown in Figure 2 and Figure 4 .

[0077] Preferably, the second insulating member 22 is accommodated in the interior of the shell 1 and is between the reinforcing member 23 and the conductive sheet 21, thereby achieving insulation therebetween and preventing electrical conduction to the reinforcing member 23 and the shell 1.

[0078] More preferably, the second insulating member 22 can be flat or bent, and the specific shape thereof can be set as required, which is not specifically limited herein.

[0079] In an embodiment, the second insulating member 22 is provided with a third through hole 221, and the pole 27 passes through the third through hole 221, as shown in Figure 2 and Figure 4 .

[0080] Preferably, the third through hole 221 penetrates the two end surfaces in the thickness direction of the second insulating member 22, and the third through hole 221 is opposite to and communicates with the second through hole 231 and the first through hole 121.

[0081] More preferably, the third through hole 221 can be circular, elliptical or polygonal, and the specific shape thereof can be set as required, which is not specifically limited herein.

[0082] Preferably, the polar post 27 passes through the third through hole 221, so as to facilitate the polar post 27 to extend outside the shell 1, and make the second insulating member 22 stably clamped between the reinforcing member 23 and the conductive sheet 21, and the structure is more stable.

[0083] In an embodiment, the sealing ring 24 is accommodated in the third through hole 221, as shown in the figure. Figure 4

[0084] Preferably, the sealing ring 24 is accommodated in the third through hole 221, so as to leave sufficient space for the sealing ring 24 between the reinforcing member 23 and the conductive sheet 21, and make the sealing ring 24 effectively seal the reinforcing member 23 and the conductive sheet 21.

[0085] More preferably, the axial thickness of the sealing ring 24 is greater than or equal to the thickness of the second insulating member 22, so that the end of the sealing ring 24 extends out of the third through hole 221, so that the conductive sheet 21 and / or the first insulating member 25 can be in sufficient contact with the sealing ring 24 to enhance the sealing effect.

[0086] In an embodiment, the outer circumferential surface 244 of the sealing ring 24 abuts against the inner circumferential surface of the third through hole 221, and the outer circumferential surface 244 of the sealing ring 24 and the inner circumferential surface of the third through hole 221 are stepped, as shown in the figure. Figure 4

[0087] Preferably, the outer circumferential surface of the sealing ring 24 abuts against the inner circumferential surface of the third through hole 221, so as to prevent a gap therebetween, so as to further enhance the sealing effect.

[0088] More preferably, the outer circumferential surface 244 of the sealing ring 24 and the inner circumferential surface of the third through hole 221 are stepped, so as to further increase the contact area therebetween, not only make the connection between the two more stable, but also further enhance the sealing effect of the two, effectively prevent the electrolyte from leaking.

[0089] In an embodiment, the utility model also provides a battery, the battery includes the battery shell 100 of any one of the above, the battery shell 100 is accommodated in the electric core 3, the conductive sheet 21 is connected with the tab 31 of the electric core 3.

[0090] Preferably, the electric core 3 is in the accommodation cavity 14 of the shell 1, and the shape of the electric core 3 is matched with the shape of the shell 1, so that the electric core 3 is completely accommodated in the accommodation cavity 14.

[0091] More preferably, the electric core 3 includes the tab 31 opposite to the first wall portion 12, one end of the tab 31 is electrically connected with the electric core 3, and the other end of the tab 31 is electrically connected with the conductive sheet 21, so as to facilitate the output of electric energy, and the structure is stable. ​​

[0092] Those skilled in the art will appreciate that the features of the various embodiments can be combined with features of other embodiments, even if that combination was not explicitly made for educational purposes. Without intending to limit the scope of the application, examples of combination are at least as follows. Any of the embodiments claimed in the claims of the application can be used in any combination.

[0093] Thus far, the technical solutions of the present application have been described in conjunction with the preferred embodiments shown in the drawings, but those skilled in the art will readily understand that the protection scope of the present application is obviously not limited to these specific embodiments. Those skilled in the art can make equivalent changes or replacements to the relevant technical features without deviating from the principles of the present application, and the technical solutions after these changes or replacements will all fall within the protection scope of the present application.

Claims

1. A battery housing, characterized in that: It includes a shell and a pole assembly, the shell includes a first wall portion, the first wall portion is provided with a first through hole, the pole assembly includes a conductive sheet, a sealing ring, a reinforcement member inside the shell, and a first insulating member outside the shell, the first insulating member passes through the first through hole, the reinforcement member is fixedly connected to the first wall portion, the first surface of the sealing ring abuts against the conductive sheet, the second surface of the sealing ring abuts against the first insulating member, the second surface is provided with a step surface, and the step surface abuts against the reinforcement member.

2. The battery case according to claim 1, wherein: The conductive sheet is provided with a pole, and the pole passes through the first through hole.

3. The battery case according to claim 2, characterized in that The reinforcement member is provided with a second through hole, and the pole and the first insulating member pass through the second through hole.

4. The battery case according to claim 3, characterized in that The pole assembly further includes a conductive block, and the pole is fixedly connected to the conductive block.

5. The battery case according to claim 4, characterized in that The first insulating member is disposed between the conductive block and the first wall portion.

6. The battery case according to claim 5, characterized in that The pole assembly further includes a second insulating member disposed between the reinforcement member and the conductive sheet.

7. The battery case according to claim 6, characterized in that The second insulating member is provided with a third through hole, and the pole passes through the third through hole.

8. The battery case according to claim 7, characterized in that The sealing ring is received in the third through hole.

9. The battery case according to claim 8, characterized in that The outer circumferential surface of the sealing ring abuts against the inner circumferential surface of the third through hole, and the outer circumferential surface of the sealing ring and the inner circumferential surface of the third through hole are stepped.

10. A battery, characterized in that: The battery comprises the battery casing according to any one of claims 1 to 9, and a battery cell accommodated in the battery casing, wherein the conductive sheet is connected to a tab of the battery cell.

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