CN113078369A

CN113078369A - Battery with a battery cell

Info

Publication number: CN113078369A
Application number: CN202110287104.5A
Authority: CN
Inventors: 常海涛; 李云星; 林新强
Original assignee: Nanfu New Energy Technology Co ltd Yanping District Nanping Fujian
Current assignee: Nanfu New Energy Technology Co ltd Yanping District Nanping Fujian
Priority date: 2021-03-17
Filing date: 2021-03-17
Publication date: 2021-07-06

Abstract

The invention discloses a battery. The battery comprises a pole piece, a diaphragm, a cover plate, a pole lug and a central tube, wherein the pole piece and the diaphragm are wound together to form a winding core, the winding core is provided with a central hole, the cover plate comprises a pole post, one side of the pole lug is connected with the pole piece, the central tube is positioned in the central hole, the pole post at least partially extends into the central tube, a pressing plate and an elastic component are arranged in the central tube, the pressing plate offsets with the elastic component, the other side of the pole lug is bent and is tightly attached to the pressing plate, elastic acting force is applied to the pressing plate by the. According to the battery provided by the invention, the pressing plate enables the lug and the pole to be tightly attached under the action of the elastic force of the elastic component, the operation convenience of external electric connection of the shell is realized, the welding area of the lug and the pole is effectively isolated from the winding core by the central tube, and the short circuit caused by the contact of the lug and the winding core is avoided.

Description

Battery with a battery cell

Technical Field

The invention relates to the technical field of batteries.

Background

In the existing battery, the bent positive pole lug is easily attached to a winding core and is not attached to the positive pole lug. The bent negative pole tab is easy to be attached to the winding core and is not attached to the negative pole. Thus, a short circuit is easily formed inside the battery.

Therefore, it is desirable to provide a battery that at least partially solves the above problems.

Disclosure of Invention

In this summary, concepts in a simplified form are introduced that are further described in the detailed description. This summary of the invention is not intended to identify key features or essential features of the claimed subject matter, nor is it intended to be used as an aid in determining the scope of the claimed subject matter.

In order to at least partially solve the above-mentioned problems, according to an aspect of the present invention, there is provided a battery including:

a pole piece and a separator wound together to form a jellyroll having a central bore;

a cover plate comprising a post;

one side of the tab is connected with the pole piece; and

the central tube, the central tube is located in the centre bore, utmost point post extends the entering at least partially in the central tube, be provided with clamp plate and elastic component in the central tube, the clamp plate with the elastic component offsets, the opposite side of utmost point ear is bent and with the clamp plate is hugged closely, elastic component is right the elastic force is applyed to the clamp plate, through the clamp plate will utmost point ear closely laminate to utmost point post.

The battery comprises a pole piece, a diaphragm, a cover plate, a pole lug and a central tube, wherein the pole piece and the diaphragm are wound together to form a winding core, the winding core is provided with a central hole, the cover plate comprises a pole column, one side of the pole lug is connected with the pole piece, the central tube is positioned in the central hole, the pole column at least partially extends into the central tube, a pressing plate and an elastic component are arranged in the central tube, the pressing plate is abutted against the elastic component, the other side of the pole lug is bent and tightly attached to the pressing plate, the elastic component applies elastic acting force to the pressing plate, and the pole lug is. Like this, the clamp plate makes utmost point ear and utmost point post closely laminate under the effect of elastic component's elastic force, has realized the simple operation nature that the outside electricity of casing is connected, and the center tube carries out effectual isolation with the welding area and the book core of utmost point ear and utmost point post, has avoided utmost point ear and the short circuit that the book core contacted and caused.

Optionally, the battery further includes a housing, the cover plate further includes a cover plate main body, the housing is located between the two cover plate main bodies along the axial direction of the central hole, and the housing and the cover plate main body are connected together by welding.

Optionally, the cover plate further comprises an insulating member, and the cover plate main body is connected with the pole through the insulating member.

Optionally, the insulating member includes an insulating inner surface facing the winding core, and the insulating inner surface is in close fit with the winding core.

Optionally, the cover sheet body comprises a cover sheet body inner surface facing the core, the cover sheet body inner surface being spaced apart from the core.

Optionally, a portion of the insulating member is located between the winding core and the cap plate body.

Optionally, the post comprises a post main body portion and a post boss portion connected to each other, and a portion of the post boss portion extends into the central tube along the axial direction.

Optionally, the insulating member includes an insulating hole, the post main body portion is located in the insulating hole, and the post protruding portion extends out of the insulating hole along the axial direction.

Optionally, the outer surface of the pole is closer to the elastic member than the outer surface of the insulating member in the axial direction.

Optionally, the cover plate main body includes a positive cover plate main body and a negative cover plate main body, the casing is located between the positive cover plate main body and the negative cover plate main body along the axial direction of the central hole, and the positive cover plate main body has a liquid injection structure.

Optionally, the battery further comprises a snap, connected with the central tube, spaced from the pressure plate in a radial direction of the central hole after the pole abuts against the snap, to allow the pressure plate to abut against the pole under the action of the elastic member.

Optionally, the buckle includes an inclined surface, the inclined surface inclines outward along the axial direction of the central hole toward the direction of the pole, and the pole abuts against the inclined surface, so that the buckle moves outward along the radial direction.

Optionally, the platen is made of an insulating material.

Optionally, the post includes along the anodal utmost point post and the negative pole post of the axial direction mutual disposition of centre bore, utmost point ear includes the edge anodal utmost point ear and the negative pole utmost point ear of axial direction mutual disposition, the clamp plate includes the edge anodal clamp plate and the negative clamp plate of axial direction mutual disposition.

Drawings

The following drawings of the invention are included to provide a further understanding of the invention. The drawings illustrate embodiments of the invention and, together with the description, serve to explain the principles and apparatus of the invention. In the drawings, there is shown in the drawings,

fig. 1 is a sectional view of a battery according to a preferred embodiment of the present invention;

FIG. 2 is a cross-sectional view taken along line A-A of FIG. 1;

FIG. 3 is a view of the battery shown in FIG. 1 with the resilient member in a compressed position; and

fig. 4 is a view of the resilient member shown in fig. 3 in a released position.

Description of reference numerals:

100: the battery 110: positive pole

111: positive electrode tab 112: positive electrode pressure plate

113: positive electrode lid main body 114: positive electrode insulating member

115: positive electrode insulating inner surface 116: inner surface of the main body of the positive electrode cover plate

117: positive electrode pole body 118: positive pole protruding part

119: positive electrode insulating hole 120: positive pole buckle

121: positive electrode slope 150: cathode pole

151: negative electrode tab 152: negative electrode pressing plate

153: negative electrode lid main body 154: negative electrode insulating member

155: negative electrode insulating inner surface 156: inner surface of the main body of the negative electrode cover plate

157: negative electrode post main body portion 158: negative pole post boss

159: negative electrode insulating hole 160: negative pole buckle

161: negative electrode slope 180: roll core

181: center hole 182: central tube

183: the elastic member 184: shell body

185: liquid injection hole 186: plugging component

Detailed Description

In the following description, numerous specific details are set forth in order to provide a more thorough understanding of the present invention. It will be apparent, however, to one skilled in the art, that the present invention may be practiced without one or more of these specific details. In other instances, well-known features have not been described in order to avoid obscuring the invention.

In the following description, for purposes of explanation, specific details are set forth in order to provide a thorough understanding of the present invention. It is apparent that the practice of the invention is not limited to the specific details set forth herein as are known to those of skill in the art. The following detailed description of the preferred embodiments of the present invention, however, the present invention may have other embodiments in addition to the detailed description, and should not be construed as being limited to the embodiments set forth herein.

It is to be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention, as the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. When the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. The terms "upper", "lower", "front", "rear", "left", "right" and the like as used herein are for purposes of illustration only and are not limiting.

Ordinal words such as "first" and "second" are referred to herein merely as labels, and do not have any other meaning, such as a particular order, etc. Also, for example, the term "component" does not itself imply the presence of "component", and the term "component" does not itself imply the presence of "component".

In the following, specific embodiments of the present invention will be described in more detail with reference to the accompanying drawings, which illustrate representative embodiments of the invention and do not limit the invention.

The invention provides a battery, which has good insulation property inside and can effectively avoid the short circuit.

Specifically, as shown in fig. 1, battery 100 includes pole pieces, separators, cover plates, center tube 182, and tabs.

Specifically, one side of the tab is connected to the pole piece. The pole ear can be connected with the pole piece in a welding mode, or the pole ear and the pole piece can be integrally formed. The pole pieces and separator can be wound together to form a jellyroll 180, the jellyroll 180 having a central aperture 181. The lamination direction of the pole pieces and the separators is parallel to the radial direction of the center hole 181. A center tube 182 is located in the central bore 181. The axial direction of the center tube 182 is substantially parallel to the axial direction of the center hole 181. Thus, the space in the winding core 180 can be effectively utilized, the space inside the battery 100 is saved, the utilization rate of the internal space is improved, and the capacity of the battery 100 can be effectively improved.

Further, in order to improve the insulation performance inside the battery 100, the center tube 182 is made of an insulating material to reduce the risk of an internal short circuit. Preferably, the center tube 182 may be made of a polymeric material. For example, the central tube 182 may be made of PP (Polypropylene) or PTFE (polytetrafluoroethylene).

The inner diameter of the central tube 182 is larger than the outer diameter of the pole. The cover plate contains a pole post that can extend at least partially into the center tube 182. The other side of the tab is bent over to locate in the center tube 182. The pole pieces are located on the outside of the central tube 182, the tabs are connected to the pole pieces and the other side of the tabs is bent in the direction of the inside of the central tube 182 so that the tabs extend into the central tube 182. The tabs located in the central tube 182 can be closely attached and connected together with the poles, have good conductive properties, and are not prone to short circuits. In order to improve the connection strength of the tab and the pole column, the tab can be connected with the pole column in a welding mode so as to avoid the separation of the tab and the pole column to generate circuit breaking.

In order to further ensure that the tab and the pole are tightly attached, a pressing plate and an elastic member 183 are further arranged in the central tube 182, and the elastic member 183 can be elastically deformed along the axial direction of the central hole 181. The pressing plate is in close contact with the elastic member 183, and the elastic member 183 can apply elastic force to the pressing plate. The pressure plate is also tightly attached to the pole lug. The tab and elastic members 183 are located on both sides of the pressure plate in the axial direction of the center hole 181. The tab is closer to the outside of the battery 100 than the elastic member 183, facilitating the tab and post attachment. The elastic member 183 applies an elastic force to the pressing plate, so that the tab can be closely attached to the pole through the pressing plate.

The battery 100 includes a positive electrode and a negative electrode. Specifically, the pole pieces include a positive pole piece and a negative pole piece (not shown), and in order to avoid short circuit caused by contact between the positive pole piece and the negative pole piece, a diaphragm is disposed between the positive pole piece and the negative pole piece. The separator is made of an insulating material to separate the positive electrode tab and the negative electrode tab. The positive pole piece, negative pole piece, and separator can be wound together to form a jellyroll 180. The winding core 180 may be configured in a cylindrical shape and have a center hole 181. The positive electrode tab and the negative electrode tab are arranged in a stacked manner in a radial direction of the center hole 181.

Likewise, the cover plates include a positive electrode cover plate and a negative electrode cover plate, which are oppositely arranged in the axial direction of the center hole 181. The positive and negative electrode cover plates are respectively located on both sides of the elastic member 183 in the axial direction of the center hole 181. The positive electrode cover plate comprises a positive electrode post 110, the negative electrode cover plate comprises a negative electrode post 150, and the positive electrode post 110 and the negative electrode post 150 are oppositely arranged along the axial direction of the central hole 181. The positive electrode post 110 and the negative electrode post 150 are respectively located on both sides of the elastic member 183 in the axial direction of the center hole 181. The tabs include a positive tab 111 and a negative tab 151, and the positive tab 111 and the negative tab 151 are oppositely arranged in the axial direction of the center hole 181. The cathode tab 111 and the anode tab 151 are respectively located on both sides of the elastic member 183 in the axial direction of the center hole 181. The pressing plate includes a positive pressing plate 112 and a negative pressing plate 152, and the positive pressing plate 112 and the negative pressing plate 152 are arranged oppositely along the axial direction of the center hole 181. The positive pressure plate 112 and the negative pressure plate 152 are respectively located on both sides of the elastic member 183 in the axial direction of the center hole 181.

The positive electrode post 110, the positive electrode tab 111, and the positive electrode pressure plate 112 are located on the same side in the axial direction of the center hole 181. The positive electrode tab 111 is located between the positive electrode post 110 and the positive electrode pressure plate 112 in the axial direction of the center hole 181. One side of the positive electrode tab 111 may be connected to a positive electrode tab, and the other side of the positive electrode tab 111 may be bent and closely attached to the positive electrode pressing plate 112. The positive pole post 110 extends at least partially into the center tube 182. The elastic member 183 is located between the positive pressure plate 112 and the negative pressure plate 152. The elastic member 183 may apply an elastic force to the positive electrode pressing plate 112, and the positive electrode tab 111 may be closely attached to the positive electrode post 110 by the positive electrode pressing plate 112. The positive tab 111 located in the central tube 182 is closely attached to the positive pressure plate 112 for good electrical conductivity. And the positive electrode tab 111 is not in contact with the winding core 180, thereby avoiding short circuit.

The negative electrode post 150, the negative electrode tab 151, and the negative electrode pressing plate 152 are located on the same side in the axial direction of the central hole 181. The negative electrode tab 151 is located between the negative electrode post 150 and the negative electrode pressing plate 152 in the axial direction of the central hole 181. One side of the negative electrode tab 151 can be connected to a negative electrode tab, and the other side of the negative electrode tab 151 can be bent and tightly attached to the negative electrode pressing plate 152. The negative electrode post 150 extends at least partially into the center tube 182. The elastic member 183 is located between the positive pressure plate 112 and the negative pressure plate 152. The elastic member 183 may apply an elastic force to the negative electrode pressing plate 152 to closely attach the negative electrode tab 151 to the negative electrode post 150 through the negative electrode pressing plate 152. The negative tab 151 located in the center tube 182 is closely attached to the negative pressure plate 152 to have good electrical conductivity. And the negative electrode tab 151 is not in contact with the winding core 180, thereby preventing a short circuit.

Further, the positive electrode pressing plate 112 may be made of an insulating material to prevent the positive electrode tab 111 from being electrically connected to the negative electrode post 150 through the elastic member 183 and the positive electrode pressing plate 112 to cause a short circuit. The negative electrode pressing plate 152 may be made of an insulating material to prevent the negative electrode tab 151 from being connected to the positive electrode post 110 through the elastic member 183 and the negative electrode pressing plate 152 to cause a short circuit. Preferably, the positive electrode pressing plate 112 and the negative electrode pressing plate 152 may also be made of a polymer material. For example, the positive electrode pressing plate 112 and the negative electrode pressing plate 152 can also be made of materials such as PP or PTFE, and the positive electrode pressing plate 112 and the negative electrode pressing plate 152 are resistant to electrolyte corrosion and have a thickness of 0.2-1.0 mm.

The elastic members 183 may respectively apply elastic force to both the positive electrode pressing plate 112 and the negative electrode pressing plate 152, so that the positive electrode tab 111 is closely attached to the positive electrode post 110 by the elastic force, and the negative electrode tab 151 is closely attached to the negative electrode post 150 by the elastic force. Of course, the elastic member 183 may apply an elastic force only to the positive electrode pressing plate 112 or only to the negative electrode pressing plate 152 so that the positive electrode tab 111 receives the elastic force or the negative electrode tab 151 receives the elastic force, which is not limited in the present embodiment.

According to the battery, the battery comprises a pole piece, a diaphragm, a cover plate, a pole lug and a central tube, wherein the pole piece and the diaphragm are wound together to form a winding core, the winding core is provided with a central hole, the cover plate comprises a pole column, the pole column at least partially extends into the central tube, one side of the pole lug is connected with the pole piece, the central tube is located in the central hole, a pressing plate and an elastic component are arranged in the central tube, the pressing plate abuts against the elastic component, the other side of the pole lug is bent and tightly attached to the pressing plate, the elastic component applies elastic acting force to the pressing plate, and. Like this, the clamp plate makes utmost point ear and utmost point post closely laminate under the effect of elastic component's elastic force, has realized the simple operation nature that the outside electricity of casing is connected, and the center tube carries out effectual isolation with the welding area and the book core of utmost point ear and utmost point post, has avoided utmost point ear and the short circuit that the book core contacted and caused.

Further, the battery 100 further includes a case 184, and the cap plate further includes a cap plate main body, and the case 184 and the cap plate main body may be coupled together by welding. The housing 184 is located between the two cover main bodies (the positive cover main body 113 and the negative cover main body 153) in the axial direction of the center hole 181. The housing 184 is configured substantially as a cylinder. The positive electrode cap plate main body 113, the negative electrode cap plate main body 153, and the case 184 may be made of a metal material. The positive electrode cover plate main body 113 and the case 184 may be coupled together by welding, and the negative electrode cover plate main body 153 and the case 184 may be coupled together by welding. The positive electrode cover plate main body 113 and the negative electrode cover plate main body 153 are spaced apart by the case 184 along the axial direction of the center hole 181 to improve the insulating property of the battery 100, and the positive electrode cover plate main body 113, the negative electrode cover plate main body 153 and the case 184 are not electrically conductive, and have high safety.

The positive electrode cap plate body 113 may be configured in a substantially plate-shaped structure. Alternatively, the positive electrode cap plate body 113 may be configured in a ring-shaped structure. The positive electrode cover plate further includes a positive electrode insulating member 114, and the positive electrode cover plate main body 113 may be connected to the positive electrode post 110 through the positive electrode insulating member 114. The positive insulating member 114 is made of an insulating material, such as a rubber ring, to prevent the positive cover body 113 and the positive electrode post 110 from being electrically connected, and thus prevent the positive electrode post 110 from being electrically connected to the negative cover body 153 to cause a short circuit. Preferably, the positive electrode cover body 113, the positive electrode insulating member 114 and the positive electrode post 110 are integrally formed by injection molding to improve structural strength and insulating property.

Further, the positive electrode cap body 113 and the winding core 180 are spaced apart to prevent the winding core 180 from being electrically connected to the positive electrode cap body 113 to cause a short circuit. The positive electrode cover plate main body 113 and the positive electrode insulating member 114 each include a stepped structure, and the positive electrode cover plate main body 113 and the positive electrode insulating member 114 can be fitted to space the positive electrode cover plate main body 113 and the winding core 180 apart from each other, thereby having good insulating properties.

Preferably, the positive electrode cap plate main body 113 may include a positive electrode cap plate main body hole including a large diameter portion and a small diameter portion communicated with each other, the small diameter portion of the positive electrode cap plate main body hole being closer to the winding core 180 than the large diameter portion of the positive electrode cap plate main body hole is to the axial direction of the center hole 181. The positive insulating member 114 is located in the positive cover body hole and protrudes from the small diameter portion of the positive cover body hole. The longitudinal sectional shape of the positive electrode insulating member 114 may be substantially zigzag. In the present embodiment, the longitudinal section is parallel to the axial direction of the center hole 181. In this way, the shape of the positive electrode insulating member 114 matches the shape of the positive electrode cover main body hole, so that the positive electrode insulating member 114 is firmly connected with the positive electrode cover main body 113.

Further, the positive electrode insulating member 114 includes a positive electrode insulating inner surface 115, and the positive electrode insulating inner surface 115 faces the winding core 180. The positive insulating inner surface 115 is in close contact with the winding core 180. Thus, the insulation between the positive electrode lid main body 113 and the winding core 180 is ensured. Preferably, the winding core 180 and the central tube 182 are flush with each other in the axial direction of the central hole 181. The positive insulating inner surface 115 also abuts the center tube 182 to prevent the center tube 182 from tilting, ensuring structural stability inside the battery 100.

Further, the positive electrode lid plate main body 113 includes a positive electrode lid plate main body inner surface 116, and the positive electrode lid plate main body inner surface 116 faces the winding core 180. The positive cover plate body inner surface 116 is substantially perpendicular to the axial direction of the central bore 181. The positive electrode cover plate main body inner surface 116 is connected to one side of the housing 184 in the axial direction of the center hole. The positive cover plate body inner surface 116 is spaced apart from the jellyroll 180. Thus, the positive electrode lid body 113 is prevented from contacting the winding core 180 and causing a short circuit.

Preferably, a portion of the positive electrode insulating member 114 is located between the winding core 180 and the positive electrode cap body 113 to further prevent the positive electrode cap body 113 from contacting the winding core 180, improving the insulating property.

The projection of the positive electrode insulating inner surface 115 in the axial direction of the center hole 181 coincides with the projection of the positive electrode lid main body inner surface 116 to ensure that the positive electrode lid main body 113 does not contact the winding core 180.

The positive electrode insulating inner surface 115 protrudes from the positive electrode lid main body 113 in a direction toward the winding core 180 in the axial direction of the center hole 181. Preferably, the protruding distance of the inner surface 115 of the positive electrode cover plate is 0.2-1.0 mm, so that the positive electrode cover plate main body 113 is spaced from the winding core 180, and the positive electrode cover plate main body has good insulating property.

Likewise, the negative electrode cover main body 153 may be configured into a substantially plate-like structure. Alternatively, the negative electrode cap body 153 may be configured in a ring-shaped structure. The negative electrode cap plate further includes a negative electrode insulating member 154, and the negative electrode cap plate main body 153 may be connected to the negative electrode post 150 through the negative electrode insulating member 154. The negative insulating member 154 is made of an insulating material, such as a rubber ring, to prevent the negative cover main body 153 and the negative electrode post 150 from being electrically connected, thereby preventing the negative electrode post 150 from being electrically connected to the positive cover main body 113 to cause a short circuit. Preferably, the negative electrode cap body 153, the negative electrode insulating member 154, and the negative electrode post 150 are integrally formed by injection molding to improve structural strength and insulating property.

Further, the negative cap plate main body 153 and the winding core 180 are spaced apart to prevent the winding core 180 from being electrically connected to the negative cap plate main body 153 to cause a short circuit. The negative electrode cap plate main body 153 and the negative electrode insulating member 154 each include a stepped structure, and the negative electrode cap plate main body 153 and the negative electrode insulating member 154 can be fitted to separate the negative electrode cap plate main body 153 from the winding core 180, thereby having good insulating properties.

Preferably, the negative electrode lid main body 153 may include a negative electrode lid main body hole including a large diameter portion and a small diameter portion communicated with each other, the small diameter portion of the negative electrode lid main body hole being closer to the winding core 180 than the large diameter portion of the negative electrode lid main body hole in an axial direction of the center hole 181. The negative insulation member 154 is located in the negative cover body hole and protrudes from the small diameter portion of the negative cover body hole. The longitudinal sectional shape of the negative electrode insulating member 154 may be substantially zigzag. In this way, the shape of the negative electrode insulating member 154 is fitted to the shape of the negative electrode cap body hole, so that the negative electrode insulating member 154 is firmly connected with the negative electrode cap body 153.

Further, the negative electrode insulating member 154 includes a negative electrode insulating inner surface 155, and the negative electrode insulating inner surface 155 faces the winding core 180. The cathode insulating inner surface 155 is in close contact with the jellyroll 180. Thus, insulation between the negative electrode lid main body 153 and the winding core 180 is ensured. Preferably, the negative insulating inner surface 155 also abuts the center tube 182 to prevent the center tube 182 from tilting, ensuring structural stability inside the cell 100.

Further, the negative cap plate body 153 includes a negative cap plate body inner surface 156, the negative cap plate body inner surface 156 facing the jellyroll 180. The negative cap plate body inner surface 156 is substantially perpendicular to the axial direction of the central hole 181. The negative cap plate main body inner surface 156 is connected to the other side of the case 184 in the axial direction of the center hole. The negative cap plate body inner surface 156 is spaced apart from the jellyroll 180. Thus, the negative electrode lid main body 153 is prevented from contacting the winding core 180 to cause a short circuit.

Preferably, a portion of the negative electrode insulating member 154 is located between the winding core 180 and the negative electrode cap body 153 to further prevent the negative electrode cap body 153 from contacting the winding core 180, improving insulating properties. The projection of the negative insulating inner surface 155 in the axial direction of the central hole 181 coincides with the projection of the negative cap body inner surface 156 to ensure that the negative cap body 153 does not contact the jellyroll 180. The negative insulating inner surface 155 protrudes from the negative cap main body 153 in the axial direction of the center hole 181 toward the winding core 180. Preferably, the protruding distance of the inner insulating surface 155 of the negative electrode is 0.2-1.0 mm, so that the negative electrode cover plate main body 153 is spaced from the winding core 180, and the negative electrode cover plate main body has good insulating performance.

In an alternative embodiment, the longitudinal cross-sectional shape of the positive electrode post 110 is convex so as to extend into the central tube 182. The positive electrode post 110 includes a positive electrode post body portion 117 and a positive electrode post boss portion 118 that are connected, and the positive electrode post boss portion 118 protrudes in the axial direction of the center hole 181 toward the elastic member 183. A portion of the positive electrode tab 118 extends into the center tube 182 in the axial direction of the center hole 181. The positive electrode tab projection 118 located in the central tube 182 is in close contact with the positive electrode tab 111. In this way, the positive electrode post 110 has sufficient connection strength with the positive electrode insulating member 114, and can extend into the central tube 182, thereby saving the space inside the battery 100 and increasing the capacity of the battery 100.

The positive electrode insulating member 114 includes a positive electrode insulating hole 119, and an axial direction of the positive electrode insulating hole 119 is substantially parallel to an axial direction of the center hole 181. Preferably, the positive insulation hole 119 and the central hole 181 may be coaxially disposed. Of course, the main body hole of the positive cover plate may be disposed coaxially with the central hole 181 to ensure the coaxiality. The positive electrode insulation hole 119 may include a large diameter portion and a small diameter portion that are communicated, and the small diameter portion of the positive electrode insulation hole 119 is closer to the winding core 180 than the large diameter portion of the positive electrode insulation hole 119 is in an axial direction of the center hole 181.

The positive electrode post 110 is located in the positive electrode insulation hole 119 and protrudes from the small-diameter portion of the positive electrode insulation hole 119. More specifically, the positive pole body 117 is located in the large diameter portion of the positive pole insulation hole 119, and the positive pole boss 118 extends in the axial direction of the center hole 181 out of the small diameter portion of the positive pole insulation hole 119. Thus, the positive electrode post 110 has good connection strength with the positive electrode insulation hole 119, and the small-diameter positive electrode post boss 118 enters the center tube 182 to save the space inside the battery 100.

The positive electrode post 110 may be connected with the positive electrode tab 111 by welding. For the convenience of welding, the positive electrode post 110 does not protrude from the positive electrode insulating member 114 in the axial direction of the central hole 181. More specifically, the positive electrode post 110 includes an outer surface, and the outer surface of the positive electrode post 110 faces the outside of the battery 100. The positive electrode insulating member 114 includes an outer surface, and the outer surface of the positive electrode insulating member 114 faces the outside of the battery 100. The outer surface of the positive electrode post 110 is spaced apart from the outer surface of the positive electrode insulating member 114 in the axial direction of the center hole 181. The outer surface of the positive electrode post 110 is closer to the elastic member 183 than the outer surface of the positive electrode insulating member 114 in the axial direction of the center hole 181. In this way, the outer surface of the positive electrode post 110 is located inside the battery 100 with respect to the outer surface of the positive electrode insulating member 114.

Optionally, the positive electrode post 110 is connected with the positive electrode tab 111 by welding. For example, the positive electrode post 110 is connected to the positive electrode tab 111 by laser welding. The elastic component 183 applies an elastic acting force to the positive electrode tab 111 to ensure that the positive electrode tab 111 and the positive electrode post 110 can be tightly attached, so as to ensure that the positive electrode tab 111 and the positive electrode post 110 can be welded together. The outer surface of the positive electrode terminal 110 may be energized and a current is applied to the positive electrode terminal 110 to weld (melt) the positive electrode terminal 110 and the positive electrode tab 111 together.

In an alternative embodiment, the negative electrode post 150 has a convex shape in longitudinal section so as to extend into the central tube 182. The negative electrode post 150 includes a negative electrode post main body portion 157 and a negative electrode post convex portion 158 connected, the negative electrode post convex portion 158 being convex toward the elastic member 183 in the axial direction of the center hole 181. A portion of the negative electrode post boss 158 extends into the center tube 182 in the axial direction of the center hole 181. The anode post boss 158 in the center tube 182 is in close contact with the anode tab 151. In this way, the negative electrode post 150 has sufficient connection strength with the negative insulating member 154, and can extend into the central tube 182, thereby saving the space inside the battery 100 and increasing the capacity of the battery 100.

The negative electrode insulating member 154 includes a negative electrode insulating hole 159, and an axial direction of the negative electrode insulating hole 159 is substantially parallel to an axial direction of the center hole 181. Preferably, the negative electrode insulating hole 159 and the center hole 181 may be coaxially disposed. Of course, the main body hole of the negative cover plate may be disposed coaxially with the central hole 181 to ensure coaxiality. The negative electrode insulating hole 159 may include a large diameter portion and a small diameter portion that are communicated, and the small diameter portion of the negative electrode insulating hole 159 is closer to the winding core 180 than the large diameter portion of the negative electrode insulating hole 159 in the axial direction of the center hole 181.

The negative electrode post 150 is located in the negative electrode insulation hole 159 and protrudes from the small diameter portion of the negative electrode insulation hole 159. More specifically, the negative electrode post main body portion 157 is located in the large diameter portion of the negative electrode insulation hole 159, and the negative electrode post boss portion 158 extends out through the small diameter portion of the negative electrode insulation hole 159 in the axial direction of the center hole 181. Thus, the negative electrode post 150 has good connection strength with the negative electrode insulation hole 159, and the small-diameter negative electrode post boss 158 enters the center tube 182 to save space inside the battery 100.

The negative electrode post 150 may be coupled to the negative electrode tab 151 by welding. For the convenience of welding, the negative electrode post 150 does not protrude from the negative electrode insulating member 154 in the axial direction of the center hole 181. More specifically, the negative electrode post 150 includes an outer surface, and the outer surface of the negative electrode post 150 faces the outside of the battery 100. The negative electrode insulating member 154 includes an outer surface, and the outer surface of the negative electrode insulating member 154 faces the outside of the battery 100. The outer surface of the negative electrode post 150 is spaced apart from the outer surface of the negative electrode insulating member 154 in the axial direction of the center hole 181. The outer surface of the negative electrode post 150 is closer to the elastic member 183 than the outer surface of the negative electrode insulating member 154 in the axial direction of the center hole 181. In this way, the outer surface of the negative electrode post 150 is located inside the battery 100 with respect to the outer surface of the negative electrode insulating member 154.

Alternatively, the negative electrode post 150 is connected with the negative electrode tab 151 by welding. For example, the negative electrode post 150 is connected to the negative electrode tab 151 by laser welding. The elastic member 183 applies an elastic force to the negative electrode tab 151 to ensure that the negative electrode tab 151 and the negative electrode post 150 can be closely attached, thereby ensuring that the negative electrode tab 151 and the negative electrode post 150 can be welded together. The outer surface of the negative electrode post 150 can be energized, and the current acts on the position where the negative electrode post 150 and the negative electrode tab 151 are attached to each other and can weld (melt) the negative electrode post 150 and the negative electrode tab 151 together.

The elastic member 183 may apply an acting force in a direction opposite to the axial direction of the central hole 181 to the positive electrode pressing plate 112 and the negative electrode pressing plate 152, respectively, so that the positive electrode tab 111 is tightly attached to the positive electrode post 110 by the positive electrode pressing plate 112, and the negative electrode tab 151 is tightly attached to the negative electrode post 150 by the negative electrode pressing plate 152.

Preferably, the cap body further has a liquid injection structure. The electrolyte may enter the interior of the battery 100 through the electrolyte injection structure. The liquid injection structure may be provided to the positive electrode cap plate body 113. The liquid injection structure includes a liquid injection hole 185 and a blocking member 186, and the blocking member 186 is used to seal the liquid injection hole 185. The blocking member 186 may be configured as a steel ball. Preferably, the injection hole 185 is provided to the positive electrode lid body 113, and communicates with the inside of the battery 100. The winding core 180 and the positive electrode cover body 113 have a first gap therebetween, and the injection hole 185 may communicate with the first gap so that the electrolyte is injected into the first gap. Of course, a second gap is provided between the winding core 180 and the can 184, and a third gap is provided between the winding core 180 and the negative electrode lid main body 153.

The first gap, the second gap and the third gap are all communicated. The positive electrode cap plate main body 113, the negative electrode cap plate main body 153, and the case 184 collectively form an inner space of the battery 100. The jelly roll 180 is located in the inner space of the battery 100. Thus, the battery 100 provided by the present invention has a large internal space and can be effectively used. The electrolyte is filled in the inner space of the battery 100 and can chemically react with the jelly roll 180 to generate electric energy. Thereby, the energy density is higher.

In order to enable the elastic member 183 to release sufficient elastic force, the battery 100 further includes a buckle, and during the processing of the battery 100, the buckle can enable the elastic member 183 to move between a compression position and a release position, so as to generate elastic force, push the pressing plate to move towards the direction of the pole, and further enable the pole lug and the pole to be tightly attached. Preferably, as shown in fig. 2, the cross-sectional shape of the snap is arc-shaped to avoid interference with the tab. In the present embodiment, the cross section is perpendicular to the axial direction of the center hole 181. Preferably, the radian range of the buckle is 30-180 degrees. The center of the catch may be located on the central axis of the central bore 181. The snaps are arranged opposite to the tabs in a radial direction of the central hole 181.

As shown in fig. 3 and 4, the battery 100 includes a positive electrode tab 120 and a negative electrode tab 160, and the positive electrode tab 120 and the negative electrode tab 160 are arranged opposite to each other in the axial direction of the center hole 181. Positive clasp 120 is connected to center tube 182. After the positive electrode post 110 abuts against the positive electrode snap 120, the positive electrode snap 120 is spaced from the positive electrode pressing plate 112 in the radial direction of the central hole 181 to allow the positive electrode pressing plate 112 to abut against the positive electrode post 110 by the elastic member 183. Therefore, the elastic acting force generated by the elastic component 183 can act on the positive electrode pressing plate 112 and the positive electrode tab 111, and the positive electrode tab 111 and the positive electrode pole 110 are tightly attached.

Further, the positive electrode buckle 120 further includes a positive electrode inclined surface 121, and the positive electrode inclined surface 121 is inclined outward toward the positive electrode post 110 along the axial direction of the central hole 181. In this way, the positive electrode post 110 abuts against the positive electrode inclined surface 121, so that the positive electrode buckle 120 can move outwards along the radial direction of the central hole 181, and further the positive electrode buckle 120 is spaced from the positive electrode pressure plate 112.

Likewise, the negative snap 160 is connected to the center tube 182. After the negative electrode post 150 abuts against the negative electrode catch 160, the negative electrode catch 160 is spaced apart from the negative electrode pressing plate 152 in the radial direction of the center hole 181 to allow the negative electrode pressing plate 152 to abut against the negative electrode post 150 by the elastic member 183. Therefore, the elastic acting force generated by the elastic component 183 can act on the negative electrode pressing plate 152 and the negative electrode tab 151, and the negative electrode tab 151 and the negative electrode pole 150 are tightly attached.

Further, the negative electrode snap 160 further includes a negative electrode inclined surface 161, and the negative electrode inclined surface 161 is inclined outward toward the direction of the negative electrode post 150 along the axial direction of the central hole 181. In this way, the negative electrode post 150 abuts against the negative electrode inclined surface 161, and the negative electrode latch 160 can be moved outward in the radial direction of the central hole 181, so that the negative electrode latch 160 is spaced apart from the negative electrode pressing plate 152.

The battery comprises a positive pole piece, a negative pole piece, a diaphragm, a central tube, a positive cover plate, a negative cover plate, a shell, a positive pole lug and a negative pole lug, wherein a positive pole pressing plate, a negative pole pressing plate, an elastic component and two buckles are arranged in the central tube. The positive pole piece, the negative pole piece and the diaphragm are wound together to form a winding core, the winding core is provided with a central hole, and the central tube is located in the central hole. The positive cover plate comprises a positive pole post, the negative cover plate comprises a negative pole post, and the positive pole post and the negative pole post at least partially extend into the central tube. The ends of the anode tab and the cathode tab are bent and then tightly attached to the anode pressing plate and the cathode pressing plate in the central tube. The positive pressure plate and the negative pressure plate are respectively positioned on two sides of the central tube, and the elastic component is positioned between the positive pressure plate and the negative pressure plate.

Before the assembly of positive pole apron and negative pole apron, initial condition is promptly, and positive clamp plate receives the anodal buckle to restrict, and negative clamp plate receives the negative pole buckle to restrict for elastic component is in compression state. After casing and anodal apron and negative pole cover plate assembly, anodal buckle and negative pole buckle are all opened, elastic component release elasticity to all exert elastic force to anodal clamp plate and negative pole clamp plate, closely laminate anodal utmost point ear to anodal utmost point post through anodal clamp plate, closely laminate negative pole utmost point ear to negative pole post through negative pole clamp plate, directly carry out the electricity with anodal utmost point ear and anodal utmost point post through external welding at last and connect, directly carry out the electricity with negative pole utmost point ear and negative pole post through external welding and connect.

Specifically, in the processing of the battery 100, after the negative electrode cover plate main body 153, the negative electrode insulating member 154 and the negative electrode post 150 are integrally formed by injection molding, the casing 184 and the negative electrode cover plate main body 153 are connected together by welding to form a container with an opening. Preferably, the case 184 may be sealed together with the negative electrode cap plate main body 153 by laser welding.

The wall of the center tube 182 is connected to both the positive pole clasp 120 and the negative pole clasp 160. The positive pole tab 120 and the negative pole tab 160 are each movable between an engaged position and a disengaged position in a radial direction of the center hole 181. Before the opening of the container is closed, that is, before the positive electrode cover main body 113 and the case 184 are connected, as shown in fig. 3, the positive electrode tab 120 at the engagement position abuts against the positive electrode pressure plate 112, and the negative electrode tab 160 at the engagement position abuts against the negative electrode pressure plate 152, so that the elastic member 183 is in a compressed state.

The positive electrode cover body 113, the positive electrode insulating member 114, and the positive electrode post 110 are integrally molded by injection molding. The positive electrode post 110 can abut against the positive electrode buckle 120 located at the clamping position, and applies an acting force in the radial direction to the positive electrode buckle 120, so that the positive electrode buckle 120 moves outwards to the separation position in the radial direction, the positive electrode buckle 120 is spaced from the positive electrode pressing plate 112 in the radial direction of the central hole 181, the elastic acting force of the elastic member 183 in the compression state is released, the positive electrode tab 111 moves towards the positive electrode post 110, and the positive electrode tab and the positive electrode post 110 are tightly attached to each other.

In the process of abutting the positive electrode post 110 and the positive electrode buckle 120, the positive electrode post 110 acts on the positive electrode inclined surface 121, so that the negative electrode post 150 can abut against the negative electrode buckle 160 located at the engagement position. The negative electrode tab 151 is moved toward the negative electrode post 150 and is tightly attached to the negative electrode post 150 by releasing the elastic force of the elastic member 183 in a compressed state by applying a radial force to the negative electrode tab 160 by the negative electrode post 150 so that the negative electrode tab 160 is moved outward to a separated position in the radial direction, and the negative electrode tab 160 is spaced from the negative electrode pressing plate 152 in the radial direction of the central hole 181.

The positive electrode cover plate body 113 and the case 184 are connected by welding, the positive electrode post 110 and the positive electrode tab 111 are connected by welding, and the negative electrode post 150 and the negative electrode tab 151 are connected by welding. Preferably, the case 184 may be sealed together with the positive electrode cap plate body 113 by laser welding.

After the assembled battery 100 is baked, the electrolyte enters the inside of the battery 100 through the pour hole 185, and the blocking member 186 blocks the pour hole 185. And finally, the battery 100 after liquid injection is subjected to chemical composition and partial volume.

According to the battery 100 of the present invention, the insulation performance of the inside of the battery 100 is good, and the case and the cap plate main body are not conductive, the safety performance is high, the utilization rate of the internal space of the battery 100 is high, and the energy density is high.

Unless defined otherwise, technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. Terms such as "part," "member," and the like, when used herein, can refer to either a single part or a combination of parts. Terms such as "mounted," "disposed," and the like, as used herein, may refer to one component as being directly attached to another component, or one component as being attached to another component through a centerpiece. Features described herein in one embodiment may be applied to another embodiment, either alone or in combination with other features, unless the feature is otherwise inapplicable or otherwise stated in the other embodiment.

The present invention has been described in terms of the above embodiments, but it should be understood that the above embodiments are for purposes of illustration and description only and are not intended to limit the invention to the scope of the described embodiments. Furthermore, it will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and that many variations and modifications may be made in accordance with the teachings of the present invention, which variations and modifications fall within the scope of the present invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. A battery, comprising:

a cover plate comprising a post;

one side of the tab is connected with the pole piece; and

2. The battery of claim 1, further comprising a housing, wherein the cover plate further comprises a cover plate body, wherein the housing is located between the two cover plate bodies along an axial direction of the central hole, and wherein the housing and the cover plate body are connected together by welding.

3. The battery of claim 2, wherein the cover plate further comprises an insulating member, and the cover plate body is connected with the post through the insulating member.

4. The battery of claim 3, wherein the insulating member includes an insulating inner surface facing the jellyroll and the insulating inner surface conforms closely to the jellyroll.

5. The battery of claim 4, wherein the cap plate body includes a cap plate body inner surface facing the jellyroll, the cap plate body inner surface being spaced apart from the jellyroll.

6. The battery of claim 5, wherein a portion of the insulating member is located between the jellyroll and the cap plate body.

7. The battery of claim 3, wherein the post comprises a post body portion and a post boss portion connected, a portion of the post boss portion extending into the central tube in the axial direction.

8. The battery of claim 7, wherein the insulating member includes an insulating hole, the post body portion is located in the insulating hole, and the post boss portion extends out of the insulating hole in the axial direction.

9. The battery of claim 8, wherein the outer surface of the post is closer to the resilient member than the outer surface of the insulating member in the axial direction.

10. The battery of claim 2, wherein the cover body comprises a positive cover body and a negative cover body, the housing is located between the positive cover body and the negative cover body in an axial direction of the central hole, and the positive cover body has a liquid injection structure.

11. The battery of claim 1, further comprising a snap connected with the central tube, the snap being spaced from the pressure plate in a radial direction of the central bore after the pole abuts the snap to allow the pressure plate to abut to the pole under the action of the resilient member.

12. The battery of claim 11, wherein the catch includes a ramp that slopes outwardly in an axial direction of the central bore toward a direction of the post, the post abutting the ramp such that the catch moves outwardly in the radial direction.

13. The battery of claim 1, wherein the pressure plate is made of an insulating material.

14. The battery of any one of claims 1 to 13, wherein the poles comprise a positive pole and a negative pole oppositely arranged along an axial direction of the central bore, the tabs comprise a positive tab and a negative tab oppositely arranged along the axial direction, and the pressing plates comprise a positive pressing plate and a negative pressing plate oppositely arranged along the axial direction.