CN218070137U - Battery core, battery module and electric automobile - Google Patents

Abstract

The utility model relates to an electricity core, battery module and electric automobile. The battery cell comprises: a housing having a first end and provided with a housing through-hole on the first end, a circumferential edge of the housing through-hole including a plurality of first through-hole arc portions; and the pole column comprises an upper end conductive block positioned on the outer side of the first end part, a lower end conductive block positioned on the inner side of the first end part and an anti-torsion part, the anti-torsion part extends through the through hole of the shell and is fixed between the upper end conductive block and the lower end conductive block, and the axial periphery of the anti-torsion part comprises a plurality of anti-torsion arc-shaped surfaces respectively matched with the arc-shaped parts of the plurality of first through holes. The utility model discloses electric core designs into the structure of constituteing by a plurality of antitorque arcwall faces through the antitorque portion with utmost point post, can show the antitorque ability that strengthens utmost point post to prevent utmost point post torsional deformation, destroy the leakproofness between utmost point post and casing, and then avoid the battery short circuit that causes because of electrolyte leaks to catch fire the scheduling problem.

Description

Battery core, battery module and electric automobile

Technical Field

The utility model relates to a battery field specifically relates to electricity core, battery module and electric automobile.

Background

The lithium ion battery has the advantages of high energy density, good power performance, long cycle life and the like, and is more and more widely applied to the field of new energy automobiles in recent years. The commonly used lithium ion batteries are mainly classified into three types, namely soft package power batteries, square power batteries and cylindrical power batteries.

Square power cells and cylindrical power cells generally include a cell casing and a post disposed on the casing. With the increasing demand for energy density of batteries, the structural design of the battery case has changed significantly. However, in the practical application of the battery, a problem is found that the vertical part of the pole connected with the shell is of a cylindrical structure, and the structure has obvious defects in torsion resistance after being installed and matched with the shell. If the anti-torque capacity of utmost point post is not enough, just can cause the leakproofness of utmost point post and steel casing bottom junction to be destroyed, the electrolyte in the steel casing can leak along the junction, and then arouses safety problems such as battery short circuit fire.

Accordingly, there is a need in the art for a new solution to the above-mentioned problems.

SUMMERY OF THE UTILITY MODEL

In order to solve the above-mentioned problem among the prior art, be not enough for the antitorque ability who solves among the prior art electric core utmost point post, lead to electrolyte to be destroyed and the technical problem who leaks because of electric core leakproofness, the utility model provides an electric core. This electricity core includes: a housing having a first end and provided with a housing through-hole on the first end, a circumferential edge of the housing through-hole including a plurality of first through-hole arc portions; and the pole column comprises an upper end conductive block positioned on the outer side of the first end part, a lower end conductive block positioned on the inner side of the first end part and an anti-torsion part, the anti-torsion part extends through the through hole of the shell and is fixed between the upper end conductive block and the lower end conductive block, and the axial periphery of the anti-torsion part comprises a plurality of anti-torsion arc-shaped surfaces respectively matched with the arc-shaped parts of the plurality of first through holes. The utility model discloses electric core designs into the structure of constituteing by a plurality of antitorque arcwall faces through the axial periphery with the antitorque portion of utmost point post (promptly utmost point post passes the vertical structure of casing through-hole), can show the antitorque ability that strengthens utmost point post to prevent that utmost point post from taking place torsional deformation, destroy the leakproofness of utmost point post and casing junction, and then avoid the inside electrolyte of electric core to leak and cause the battery short circuit to catch fire the scheduling problem. Through setting the casing through-hole to the structure that has the first through-hole arc portion corresponding with a plurality of anti-torque arc faces to make the casing through-hole match with utmost point post anti-torque portion structure, thereby guarantee the leakproofness of utmost point post and casing junction.

In a preferred technical solution of the above battery cell, a conductive block through hole is provided in the upper end conductive block, a circumferential edge of the conductive block through hole includes a plurality of second through hole arc portions, the torsion resistant portion extends through the conductive block through hole, and the plurality of torsion resistant arc surfaces are respectively matched with the plurality of second through hole arc portions. Through foretell setting, not only be convenient for the upper end conducting block fixed with being connected of antitorque portion, be convenient for moreover with utmost point post installation and fixed to the casing.

In a preferred technical solution of the above battery cell, an axial outer periphery of the torsion-resistant portion includes at least three arc-shaped convex surfaces and at least three arc-shaped concave surfaces that form a smooth transition and are alternated with each other. Through foretell setting, design into the unsmooth circular arc structure of a plurality of circular arcs rounding off with utmost point post anti-torque portion, be favorable to strengthening the anti-torque capacity of utmost point post to prevent utmost point post deformation, destroy the leakproofness between utmost point post and the casing. Further, the design of circular arc transition is also favorable for ensuring the manufacturability of the pole.

In a preferred embodiment of the battery cell, an axial outer periphery of the torsion-resistant portion includes six arc-shaped convex surfaces and six arc-shaped concave surfaces, which are smoothly and alternately transited with each other. Through the arrangement, the torsion resistance of the pole can be remarkably enhanced, so that the pole is effectively prevented from torsional deformation.

In a preferred embodiment of the battery cell, an axial outer periphery of the torsion resistant portion has a cross section of a kidney-shaped structure perpendicular to a centerline thereof and includes two arc-shaped surfaces facing each other. The anti-torsion capacity of the pole is enhanced, so that the pole is prevented from being deformed, and the sealing performance between the pole and the shell is damaged.

In a preferred technical scheme of the battery cell, the lower end conductive block and the torsion resistant portion are integrally formed, and the upper end conductive block and the torsion resistant portion are fixedly connected through a riveting process. The riveting process has the advantages of reliable connection, small deformation of components, good fatigue resistance and the like. Through foretell setting, not only be favorable to guaranteeing the stability of the self structure of utmost point post, be favorable to the installation of utmost point post and casing moreover fixed.

In a preferred technical solution of the above battery cell, a flash groove is provided on an end portion of the conductive block through hole, which is far from the first end portion, the flash groove extends radially outward along the conductive block through hole, and a radial dimension of the flash groove is larger than a radial dimension of the conductive block through hole. The arrangement of the flash groove can solve the problem that the torsion resistant part of the pole deforms and flashes towards the edge due to larger extrusion force when the pole is riveted, so that the safety and the reliability of a riveting process are ensured, and the good appearance of a riveting point is ensured.

In the preferable technical scheme of the battery cell, a sealing ring is arranged between the shell and the pole. Through foretell setting, be favorable to ensureing sealed and insulating between utmost point post and the casing.

In a preferred embodiment of the above battery cell, the sealing ring includes: an upper seal ring disposed between an outer wall of the first end portion and the upper end conductive block and extending along the outer wall beyond a first surface of the upper end conductive block proximate the outer wall; and the lower sealing ring comprises a lower sealing ring vertical part and a lower sealing ring transverse part which are mutually connected, the lower sealing ring vertical part is arranged between the shell through hole and the anti-torsion part and extends along the axial direction of the anti-torsion part, and the lower sealing ring transverse part is arranged between the inner wall of the first end part and the lower end conducting block and extends along the inner wall to exceed the second surface of the lower conducting block close to the inner wall. Through foretell setting, go up sealing washer and lower seal ring and can ensure sealed and insulating reliability between utmost point post and the casing to divide into sealing washer and lower seal ring with the sealing washer, be favorable to simplifying the structure of sealing washer, reduce manufacturing cost.

In a preferred technical scheme of the battery core, the radial sizes of the upper end conductive block and the lower end conductive block are both larger than the radial size of the through hole of the shell. Through foretell setting, be favorable to guaranteeing the reliability that utmost point post and casing are connected.

In order to solve the above-mentioned problem among the prior art, be not enough for the antitorque ability who solves among the prior art electric core utmost point post, lead to electrolyte to be destroyed and the technical problem who leaks because of electric core leakproofness, the utility model also provides a battery module. The battery module comprises a plurality of battery cores according to the foregoing description. Through the aforesaid setting, the utility model discloses the utmost point post of each electric core in the battery module all has stronger antitorque power, is difficult for taking place torsional deformation, therefore can effectively avoid catching fire the scheduling problem because of the battery short circuit that electrolyte leaks and causes.

In order to solve the above-mentioned problem among the prior art, be not enough for the antitorque ability who solves among the prior art electric core utmost point post, lead to electrolyte to be destroyed and the technical problem who leaks because of electric core leakproofness, the utility model also provides an electric automobile. The electric vehicle comprises at least one battery cell according to the above or at least one battery module according to the above. Through the above setting, the utility model discloses electric automobile's battery has better stability.

Scheme 1. An electric core, characterized in that, the electric core includes:

a housing having a first end and provided with a housing through-hole on the first end, a circumferential edge of the housing through-hole including a plurality of first through-hole arc portions; and

the pole comprises an upper end conductive block positioned on the outer side of the first end portion, a lower end conductive block positioned on the inner side of the first end portion, and an anti-torsion portion, wherein the anti-torsion portion extends through the through hole of the shell and is fixed between the upper end conductive block and the lower end conductive block, and the axial periphery of the anti-torsion portion comprises a plurality of anti-torsion arc-shaped surfaces matched with the arc-shaped portions of the first through holes respectively.

The battery cell according to claim 1, wherein a conductive block through hole is formed in the upper end conductive block, a circumferential edge of the conductive block through hole includes a plurality of second through hole arcs, the torsion resistant portion extends through the conductive block through hole, and the torsion resistant surfaces are respectively matched with the second through hole arcs.

The battery cell according to claim 1 or 2, wherein an axial outer periphery of the torsion resistant portion includes at least three arc-shaped convex surfaces and at least three arc-shaped concave surfaces which form a smooth transition with each other and alternate.

The battery cell according to claim 3, wherein an axial outer periphery of the torsion resistant portion includes six arc-shaped convex surfaces and six arc-shaped concave surfaces that form a smooth transition with each other and alternate.

The battery cell according to claim 1 or 2, wherein an axial outer periphery of the torsion portion has a cross section of a kidney-shaped structure perpendicular to a centerline thereof and includes two arc-shaped surfaces opposite to each other.

The battery cell according to claim 2, wherein the lower end conductive block and the torsion resistant portion are integrally formed, and the upper end conductive block and the torsion resistant portion are fixedly connected through a riveting process.

The battery core according to claim 6, wherein a flash groove is provided at an end of the through hole of the conductive block through hole, the end being away from the first end, the flash groove extending radially outward along the conductive block through hole and having a radial dimension greater than that of the conductive block through hole.

Scheme 8. The battery cell according to scheme 7, wherein a sealing ring is arranged between the casing and the pole.

Scheme 9. The battery cell of scheme 8, characterized in that, the sealing washer includes:

an upper seal ring disposed between the outer wall of the first end portion and the upper end conductive block and extending along the outer wall beyond a first surface of the upper end conductive block adjacent the outer wall; and

the lower sealing ring comprises a lower sealing ring vertical portion and a lower sealing ring transverse portion which are mutually connected, the lower sealing ring vertical portion is arranged between the shell through hole and the anti-torsion portion and extends along the axial direction of the anti-torsion portion, the lower sealing ring transverse portion is arranged between the inner wall of the first end portion and the lower end conductive block and extends along the inner wall to exceed the second surface, close to the inner wall, of the lower end conductive block.

The battery core according to claim 1 or 2, wherein the radial dimensions of the upper end conductive block and the lower end conductive block are both greater than the radial dimension of the through hole of the casing.

Scheme 11, a battery module, characterized in that, the battery module includes a plurality of electric cores according to any one of schemes 1-10.

The electric vehicle is characterized by comprising at least one battery cell according to any one of the aspects 1 to 10 or at least one battery module according to the aspect 11.

Drawings

Preferred embodiments of the present invention are described below with reference to the accompanying drawings, in which:

fig. 1 is a schematic structural diagram of an embodiment of a battery cell of the present invention;

fig. 2 is a schematic structural diagram of an embodiment of a case in a battery cell according to the present invention;

fig. 3 is a top view of an embodiment of a housing in a cell of the present invention;

fig. 4 is an exploded view of an embodiment of a terminal post in a battery cell according to the present invention;

fig. 5 is a schematic structural diagram of an embodiment of the torsion-resistant portion and the lower end conductive block in the battery cell of the present invention;

fig. 6 is a schematic diagram of another embodiment of a torsion resistant portion in a cell of the present invention;

fig. 7 is a sectional view of a partial structure of an embodiment of a battery cell of the present invention.

List of reference numerals:

1. an electric core; 10. a housing; 11. a first end portion; 111. a housing through hole; 112. a circumferential edge; 113. a first through-hole arc portion; 1131. a through hole boss; 1132. a through hole recess; 114. an outer wall; 115. an inner wall; 12. a second end portion; 121. an opening; 13. an upper cover plate; 14. A shell; 20. a pole column; 21. an upper end conductive block; 211. a conductive block through hole; 212. a flash tank; 213. a first surface; 22. a torsion resistant portion; 221. an axial outer periphery; 222. an anti-torque arc face; 2221. An arc convex surface; 2222. an arc-shaped concave surface; 23. a lower-end conductive block; 231. a second surface; 30. a seal ring; 31. an upper sealing ring; 311. an upper seal ring lateral portion; 312. an upper seal ring vertical portion; 32. a lower seal ring; 321. a lower seal ring lateral portion; 322. a lower seal ring vertical portion; 40. a lower cover plate.

Detailed Description

Preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only for explaining the technical principle of the present invention, and are not intended to limit the scope of the present invention.

It should be noted that in the description of the present invention, the terms of direction or positional relationship indicated by the terms "upper", "lower", "left", "right", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, which are only for convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

Furthermore, it should be noted that, in the description of the present invention, unless otherwise explicitly specified or limited, the terms "disposed" and "connected" are to be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; either directly or indirectly through intervening media, or through the communication between two elements. The specific meaning of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In order to solve among the prior art not enough in the antitorque ability of electric core utmost point post, lead to electrolyte to be destroyed and the technical problem who leaks because of electric core leakproofness, the utility model provides an electric core 1. The battery cell 1 comprises a casing 10, the casing 10 has a first end 11, and a casing through hole 111 is arranged on the first end 11, and a circumferential edge 112 of the casing through hole 111 comprises a plurality of first through hole arc-shaped parts 113; and a pole post 20, the pole post 20 including an upper end conductive block 21 located at an outer side of the first end portion 11, a lower end conductive block 23 located at an inner side of the first end portion 11, and a torsion resistant portion 22, the torsion resistant portion 22 extending through the housing through-hole 111 and being fixed between the upper end conductive block 212 and the lower end conductive block 23, an axial outer periphery 221 of the torsion resistant portion 22 including a plurality of torsion resistant arc surfaces 222 respectively matching the plurality of first through-hole arc portions 113.

Fig. 1 is a schematic structural diagram of an embodiment of a battery cell of the present invention. As shown in fig. 1, in one or more embodiments, the electric core 1 of the present invention is a cylindrical power battery. In alternative embodiments, the battery cell 1 may also be a square power battery or other suitable battery cell. The battery cell 1 includes, but is not limited to, a casing 10, a terminal post 20, a sealing ring 30 (see fig. 7), a lower cover plate 40, a winding core (not shown), and an electrolyte (not shown).

It is noted that, unless expressly stated to the contrary, the terms "upper", "lower", "left" and "right" are used herein with reference to the orientation shown in fig. 1.

Fig. 2 is a schematic structural diagram of an embodiment of a case in a battery cell according to the present invention; fig. 3 is a top view of an embodiment of a housing in a battery cell of the present invention. As shown in fig. 2, the case 10 encloses a substantially cylindrical receiving chamber for receiving the winding core and the electrolyte. In one or more embodiments, the housing 10 is made of a steel material to provide good mechanical properties, particularly high stiffness, and to reduce manufacturing costs. Alternatively, the housing 10 may be made of an aluminum material, or any other suitable material. The housing 10 includes a first end 11 and a second end 12. The second end 12 is a lower end of the housing 10. An opening 121 (see fig. 7) is provided on the second end portion 12 to enable a winding core, an electrolyte, and the like to be put into the case 10. As shown in fig. 2, the first end portion 11 is an upper end portion opposite to the second end portion 12. An upper cover plate 13 is provided on the top of the first end portion 11, and a housing through hole 111 is provided on the upper cover plate 13. As shown in fig. 2 and 3, the housing through-hole 111 is located at a middle position of the upper cover plate 13. In alternative embodiments, the housing through hole 111 may be provided at other suitable positions of the upper cover plate 13. The circumferential edge 112 of the housing through-hole 111 includes 12 first through-hole arc portions 113. Specifically, 6 of the first through-hole arc portions 113 are through-hole protrusions 1131, and the other 6 of the first through-hole arc portions 113 are through-hole recesses 1132. The 6 via protrusions 1131 and the 6 via recesses 1132 alternate with each other and form a rounded transition. It is conceivable that both ends of each through-hole protrusion 1131 are connected to the adjacent through-hole recesses 1132 and both ends of each through-hole recess 1132 are connected to the adjacent through-hole protrusions 1131, thereby forming a flower-like shape. In alternative embodiments, the housing through-hole 111 may have any other suitable shape that provides a non-rotatable and sealing fit with the pole post 20.

With continued reference to fig. 2, the housing 10 also has a shell 14. The casing 14 has a tubular structure with both ends penetrating therethrough. The upper end (not shown) of the casing 14 is connected to the upper cover 13, and in the present embodiment, the casing 14 and the upper cover 13 are integrally formed to constitute the housing 10. In alternative embodiments, the shell 14 and the upper cover plate 13 are fixedly connected by a welding process or other suitable process. An opening 121 is formed in a lower end portion (not shown) of the casing 14, i.e., the opening 121 in the second end portion 12 of the housing 10.

Referring to fig. 1 and 2, the battery cell 1 further has a lower cover plate 40. The lower cover plate 40 is used to cover the opening 121 of the case 10 to seal the case 10. Specifically, the lower cover plate 40 is fixedly coupled to the can 14 of the can 10 through a welding process, thereby sealing the jelly roll, the electrolyte, and the like in the can 10. In alternative embodiments, the lower cover plate 40 may be fixedly connected to the housing 10 by other suitable processes.

Fig. 4 is an exploded view of an embodiment of a terminal post in a battery cell according to the present invention; fig. 5 is a schematic structural diagram of an embodiment of the anti-torsion portion and the lower end conductive block in the battery cell of the present invention. As shown in fig. 4, in one or more embodiments, the pole 20 includes an upper conductive block 21, a torsion resistant portion 22, and a lower conductive block 23. The upper-end conductive block 21 has a substantially circular disk structure. In alternative embodiments, the upper conductive block 21 may also be in the shape of a flat square, a rectangular parallelepiped, or any other suitable shape. A conductive block through hole 211 is provided at a middle position of the upper-end conductive block 21. It is to be noted that the cross section of the conductive block through hole 211 is identical to that of the housing through hole 111. It is conceivable that the circumferential edge of the conductive block through hole 211 includes 12 second through hole arc portions (not labeled in the figure), and each second through hole arc portion corresponds to each first through hole arc portion 113 in a one-to-one structural relationship, so as to match the structure of the terminal 20. The upper conductive block 21 also has a flash 212. A flash 212 is provided on the illustrated upper end of the conductive-block through-hole 211. The flash groove 212 extends outward in the radial direction of the conductive-piece through hole 211 to form a groove body having an outer diameter larger than that of the conductive-piece through hole 211. In an alternative embodiment, the provision of the flash tank 212 may be eliminated.

Referring to fig. 4 and 5, the lower end conductive block 23 has a substantially circular disk structure, and the outer diameter of the lower end conductive block 23 is slightly smaller than the outer diameter of the upper end conductive block 21. In alternative embodiments, the lower conductive block 23 may also have a flat square shape, a rectangular parallelepiped shape, or any other suitable shape. In an alternative embodiment, the outer diameter of the lower conductive block 23 may be slightly larger than the outer diameter of the upper conductive block 21. Alternatively, the outer diameter of the lower end conductive block 23 may be the same as the outer diameter of the upper end conductive block 21, as long as the stable connection of the pole 20 and the housing 10 can be ensured.

As shown in fig. 4 and 5, the torsion portion 22 extends perpendicularly outward from the second surface 231 of the lower end conductive block 23. In the present embodiment, the torsion preventing portion 22 and the lower end conductive block 23 are integrally formed. In alternative embodiments, the torsion portion 22 and the lower conductive block 23 may be fixedly connected by other suitable means. Alternatively, the upper end conductive block 21, the torsion portion 22, and the lower end conductive block 23 may be integrally formed. As shown in fig. 5, the axial outer periphery 221 of the torque section 22 includes 12 torque receiving surfaces 222. Specifically, the 12 anti-torque surfaces 222 include 6 arc-shaped convex surfaces 2221 and 6 arc-shaped concave surfaces 2222. The 6 arc-shaped convex surfaces 2221 and the 6 arc-shaped concave surfaces 2222 alternate with each other and form a rounded transition. It is conceivable that both sides of each of the arc-shaped convex surfaces 2221 are connected to the adjacent arc-shaped concave surfaces 2222, and both sides of each of the arc-shaped concave surfaces 2222 are connected to the adjacent arc-shaped convex surfaces 2221. It is noted that the arcuate convex surface 2221 is structurally matched to the through-hole protrusion 1131 of the housing through-hole 111, and the arcuate concave surface 2222 is structurally matched to the through-hole recess 1132, so that the torsion portion 22 is structurally matched to the housing through-hole 111 and the conductive block through-hole 211. In alternative embodiments, the torsion portion 22 may be of other suitable configurations, as shown in particular in fig. 6.

Fig. 6 is a schematic diagram of another embodiment of the torsion resistant portion in the electric core of the present invention. It will be appreciated that fig. 6 contains an example of 5 different torque sections 22, and each example figure is a top view of a torque section 22. As shown in example (1) in fig. 6, the torsion portion 22 is a waist-shaped structure. The axial outer periphery 221 of the torsion portion 22 is formed by two parallel flat surfaces (not shown) and two opposite arcuate surfaces (not shown). Accordingly, the housing through-hole 111 and the conductive block through-hole 211 are provided in a structure to be matched with the torsion portion 22. As shown in example (2), the axial outer periphery 221 of the torque receiving portion 22 may also be formed of four arc-shaped surfaces to have a cross-sectional shape similar to a "C". Accordingly, the housing through-hole 111 and the conductive block through-hole 211 are provided in a structure to be matched with the torsion portion 22. As shown in example (3), the axial outer periphery 221 of the torque resisting portion 22 may also include three arc-shaped convex surfaces and three arc-shaped concave surfaces that smoothly transition and alternate with each other. Accordingly, the housing through-hole 111 and the conductive block through-hole 211 are provided in a structure to be matched with the torsion portion 22. As shown in example (4), the axial outer periphery 221 of the torque resisting portion 22 may also include four arc-shaped convex surfaces and four arc-shaped concave surfaces that smoothly transition and alternate with each other. Accordingly, the housing through hole 111 and the conductive block through hole 211 are provided in a structure to be matched with the torsion portion 22. As shown in example (5), the axial outer periphery 221 of the torque portion 22 may also include five arcuate convex surfaces and five arcuate concave surfaces that smoothly transition and alternate with each other. Accordingly, the housing through-hole 111 and the conductive block through-hole 211 are provided in a structure to be matched with the torsion portion 22. In addition to the above 5 examples shown in fig. 6, the torsion-resistant portion 22 may also be another suitable structure composed of the torsion-resistant arc-shaped surface 222, which may be selected according to the process requirements, as long as the housing through hole 111 and the conductive block through hole 211, which are matched with the structure, are matched, and the pole 20 and the housing 10 are ensured to form a torsion-resistant and sealed connection. The arrangement of the plurality of anti-rotation arc-shaped surfaces 222 can significantly improve the anti-rotation capability of the anti-rotation portion 22, thereby effectively avoiding the pole 20 from being subjected to force and being subjected to torsional deformation. Further, the smooth transition structure between the plurality of anti-torsion arc surfaces 222 can ensure the manufacturability of the pole 20 and the housing 10, and ensure the sealing performance between the pole 20 and the housing 10.

Fig. 7 is a sectional view of a partial structure of an embodiment of a battery cell according to the present invention. Fig. 7 shows a specific connection relationship between the pole 20 and the housing 10. In one or more embodiments, as shown in fig. 7, the pole 20 is secured to the first end 11 of the housing 10, and a sealing ring 30 is disposed between the pole 20 and the housing 10. Specifically, the upper end conductive block 21 of the pole 20 is located outside the first end portion 11 of the housing 10 (i.e., above the housing 10 in the drawing), and the lower end conductive block 23 is located inside the first end portion 11 (i.e., below the housing 10 in the drawing). The torsion resistant portion 22 extends upward from the second surface 231 of the lower end conductive piece 23 (i.e., the upper surface of the lower end conductive piece 23) through the housing through hole 111 and the conductive piece through hole 211 of the upper end conductive piece 21. Since the radial dimensions of the upper end conductive block 21 and the lower end conductive block 23 are larger than the radial dimension of the housing through hole 111, the pole 20 can be fixed to the housing 10 by the above-described arrangement. Further, an upper seal ring lateral portion 311 of the upper seal ring 31 is provided between the outer wall 114 of the housing 10 and the first surface 213 of the upper end conductive block 21 (i.e., the lower surface of the upper end conductive block 21). The upper seal lateral portion 311 abuts the outer wall 114 and the first surface 213 and extends along the outer wall 114 beyond the first surface 213. The upper seal ring 31 also has an upper seal ring vertical portion 312. The upper seal vertical portion 312 extends vertically upward from an outer end surface (outward from the torsion portion 22 based on the orientation shown in the drawing) of the upper seal horizontal portion 311, and abuts against an outer periphery (not shown) of the upper end conductive block 21. In an alternative embodiment, the upper seal ring vertical portion 312 may be eliminated. A lower seal lateral portion 321 of the lower seal 32 is provided between the inner wall 115 of the housing 10 and the second surface 231 of the lower end conductive block 23. Lower seal ring lateral portion 321 abuts inner wall 115 and second surface 231 and extends along inner wall 115 beyond second surface 231. The lower seal ring 32 also has a lower seal ring vertical portion 322. The lower seal ring vertical portion 322 extends vertically upward from an inner end portion (based on the illustrated orientation, inward of the torsion portion 22) of the lower seal ring lateral portion 321, and abuts against the axial outer periphery 221 of the torsion portion 22 to ensure sealing between the axial outer periphery 221 of the torsion portion 22 and the housing through-hole 111. In the present embodiment, the lower-seal-ring lateral portion 321 and the lower-seal-ring vertical portion 322 are integrally formed. In an alternative embodiment, the lower seal ring transverse portion 321 and the lower seal ring vertical portion 322 may also be provided separately. The upper seal ring 31 and the lower seal ring 32 together constitute the seal ring 30. The sealing ring 30 is provided to ensure the sealing effect between the terminal post 20 and the housing 10, and prevent the electrolyte from leaking. It should be noted that the upper end conductive block 21 and the torsion portion 22 are fixedly connected by a riveting process. During the riveting process, the torsion resistant portion 22 is subjected to a large pressing force to generate deformation flash. The flash groove 212 in the upper conductive block 21 can receive the flash, so as to ensure the safety and reliability of the riveting process and the good appearance of the riveting point. The pole 20 is also connected to the sealing ring 30 and the housing 10 by riveting. In alternative embodiments, the upper conductive block 21 may be fixedly connected to the torsion portion 22 by other suitable processes, as long as the pole 20 can be fixed on the housing 10.

The utility model also provides a battery module (not shown in the figure). In one or more embodiments, the Battery includes, but is not limited to, a BMS (Battery Management System), a thermal Management System, a plurality of cells 1, and the like. The electric cores 1 can be electrically connected in series or in parallel so as to provide electric energy for external equipment.

The utility model provides an electric automobile (not shown in the figure). The electric automobile includes but is not limited to body, chassis, wheels, motor, etc. The electric vehicle also has at least one electrical core 1 described above or at least one battery module described above. Preferably, this electric automobile includes a plurality of battery module that link to each other, and every battery module is by a plurality of the utility model discloses electricity core 1 forms through establishing ties or parallelly connected combination.

So far, the technical solutions of the present invention have been described in connection with the preferred embodiments shown in the drawings, but it is easily understood by those skilled in the art that the scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, a person skilled in the art can make equivalent changes or substitutions to the related technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present invention.

Claims (10)

1. A battery cell, comprising:

a housing having a first end and provided with a housing through-hole on the first end, a circumferential edge of the housing through-hole including a plurality of first through-hole arc portions; and

the pole comprises an upper end conductive block located on the outer side of the first end portion, a lower end conductive block located on the inner side of the first end portion and an anti-torsion portion, wherein the anti-torsion portion extends through the shell through hole and is fixed between the upper end conductive block and the lower end conductive block, and the axial periphery of the anti-torsion portion comprises a plurality of anti-torsion arc-shaped surfaces matched with the arc-shaped portions of the first through holes respectively.

2. The electrical core of claim 1, wherein a conductive block through hole is provided in the upper end conductive block, a circumferential edge of the conductive block through hole comprises a plurality of second through hole arcs, the torsion resistant portion extends through the conductive block through hole, and the plurality of torsion resistant surfaces are respectively matched with the plurality of second through hole arcs.

3. The electric core according to claim 1 or 2, wherein the axial outer periphery of the torsion portion comprises at least three arc-shaped convex surfaces and at least three arc-shaped concave surfaces which form a smooth transition with each other and are alternated.

4. The cell of claim 3, wherein an axial outer periphery of the torsion portion comprises six arcuate convex surfaces and six arcuate concave surfaces that form a rounded transition and alternate with each other.

5. The electric core according to claim 1 or 2, wherein the axial outer circumference of the torsion portion has a cross-section perpendicular to its centerline in a kidney-shaped configuration and comprises two arc-shaped faces opposite to each other.

6. The battery cell of claim 2, wherein the lower end conductive block is integrally formed with the torsion resistant portion, and the upper end conductive block and the torsion resistant portion are fixedly connected through a riveting process.

7. The electrical core of claim 6, wherein a flash groove is disposed on an end portion of the conductive via, which is away from the first end portion, and the flash groove extends radially outward along the conductive via and has a radial dimension greater than that of the conductive via.

8. The electrical core of claim 7, wherein a sealing ring is disposed between the casing and the pole.

9. A battery module, characterized in that the battery module comprises a plurality of battery cells according to any one of claims 1-8.

10. An electric vehicle, characterized in that the electric vehicle comprises at least one battery cell according to any one of claims 1 to 8 or at least one battery module according to claim 9.

Images