CN215816066U

CN215816066U - A top cap subassembly, battery and energy memory for battery

Info

Publication number: CN215816066U
Application number: CN202122307670.6U
Authority: CN
Inventors: 徐卫东; 张男; 易梓琦; 吴祖钰
Original assignee: Xiamen Haichen New Energy Technology Co Ltd
Current assignee: Xiamen Hithium Energy Storage Technology Co Ltd
Priority date: 2021-09-23
Filing date: 2021-09-23
Publication date: 2022-02-11
Anticipated expiration: 2031-09-23

Abstract

The utility model discloses a top cover assembly for a battery, the battery and an energy storage device. The top cap subassembly is including the insulating cover plate, the lamina tecti, the insulating part, the mass flow row that stack gradually the setting, and sealed chamber is injectd towards first chimb and protrusion in the surface of the interior perisporium of mounting hole on first chimb orientation insulating part's surface, the internal perisporium of mounting hole, the lamina tecti, has the clearance between the internal perisporium of perforating hole and the periphery wall of main part, and clearance and sealed chamber intercommunication are equipped with the sealing member in the sealed chamber. According to the top cap assembly for the battery of the utility model, when the sealing member is assembled in the sealing cavity, part of the structure of the sealing member is deformed under the action of the pressing force, and part of the structure of the sealing member can block the opening, so that the sealing effect of the sealing member can be improved.

Description

A top cap subassembly, battery and energy memory for battery

Technical Field

The utility model relates to the technical field of batteries, in particular to a top cover assembly for a battery, the battery and an energy storage device.

Background

With the development of society, the environmental pollution is aggravated and the traditional energy is exhausted day by day, so people have stronger and stronger awareness on environmental protection. Lithium ion batteries are the first choice of green energy due to their advantages of high energy density, high voltage, low discharge rate, long cycle life, etc., and thus are widely used in portable devices such as bluetooth headsets, mobile phones, digital computers, tablet computers, etc., and large-scale devices such as electric vehicles, energy storage power stations, etc.

Compared with the prior art, the cylindrical flexible package lithium ion battery can better exert the utilization rate of the internal space. Although there is also an application case of the cylindrical flexible package lithium ion battery at present, the tab position of the existing cylindrical flexible package lithium ion battery is relatively fixed, so that the connection position of each surface needs to be additionally sealed. This tends to cause problems with sealing of the battery, as well as deformation and leakage during use.

SUMMERY OF THE UTILITY MODEL

The present invention is directed to solving at least one of the problems of the prior art. To this end, the present invention provides a cap assembly for a battery, which has advantages of good sealability and simple structure.

The utility model also provides a battery, which is provided with the top cover component for the battery.

The utility model also provides an energy storage device which comprises the battery.

A cap assembly for a battery according to an embodiment of the present invention includes: the insulating cover plate is provided with a mounting hole and a mounting part; the top cover plate and the insulating cover plate are arranged in a stacked mode, a through hole is formed in the top cover plate, and the through hole is opposite to the mounting hole; the insulating piece is positioned on one side, away from the insulating cover plate, of the top cover plate, and is provided with a positioning hole, and the positioning hole is opposite to the through hole; the current collecting bar is arranged on one side, away from the top cover plate, of the insulating cover plate, and the current collecting bar is installed on the installation part;

the polar column is connected with the current collecting bar and comprises a main body part and a first convex edge, the first convex edge is positioned at the edge of one end, facing the current collecting bar, of the main body part, the first convex edge protrudes out of the peripheral wall surface of the main body part, the main body part penetrates through the positioning hole, the through hole and the mounting hole, and the first convex edge is abutted against the insulating cover plate; the first convex edge faces the surface of the insulating piece, the inner peripheral wall of the mounting hole, the top cover plate faces the first convex edge and protrudes out of the surface of the inner peripheral wall of the mounting hole to define a sealing cavity, a gap is formed between the inner peripheral wall of the through hole and the outer peripheral wall of the main body part, the gap is communicated with the sealing cavity, and a sealing piece is arranged in the sealing cavity.

According to the top cover assembly for the battery of the embodiment of the utility model, the sealing cavity is formed by utilizing the pole, the insulating piece, the top cover plate and the insulating cover plate, and is communicated with the gap between the inner peripheral wall of the through hole and the outer peripheral wall of the main body part, when the sealing element is assembled in the sealing cavity, part of the structure of the sealing element is deformed under the action of the extrusion force, and part of the structure of the sealing element can block the opening, so that the sealing effect of the sealing element can be improved.

In some embodiments, the sealing member is sleeved on the main body portion and abuts against the first convex edge.

In some embodiments, the top cover plate has a step that abuts the seal.

In some embodiments, further comprising: the pressing block is arranged on one side, deviating from the top cover plate, of the insulating part, a limiting hole is formed in the pressing block, and the limiting hole is opposite to the positioning hole.

In some embodiments, a side of the press block facing the insulator has a fitting protrusion, and a side of the insulator facing the press block has a fitting groove, and the fitting protrusion is engaged with the fitting groove.

In some embodiments, the pole further comprises: the second chimb, the second chimb is located the edge of the other end of main part, second chimb protrusion in the all wall face of main part, the second chimb is followed the circumferential direction of main part extends, the second chimb with the briquetting ends.

In some embodiments, the compact, the insulator, the top cover plate, and the insulating cover plate are sandwiched between the second rim and the first rim.

In some embodiments, the cross-sectional area of the mounting hole gradually decreases in a direction from the first convex edge to the second convex edge.

In some embodiments, the limiting hole includes a first hole section, a second hole section and a third hole section which are sequentially communicated, the second convex edge is located in the second hole section, the main body portion is located in the third hole section, and the radial dimension of the first hole section is larger than that of the second hole section.

In some embodiments, the end of the limiting hole facing the insulator has a first chamfer.

In some embodiments, the top cover plate is provided with an anti-rotation groove, the through hole is arranged in the anti-rotation groove,

the peripheral wall of the insulating part is provided with an anti-rotation convex edge, and the anti-rotation convex edge is embedded in the anti-rotation groove.

In some embodiments, the anti-rotation flange includes a first anti-rotation edge and a second anti-rotation edge, and an included angle is formed between the first anti-rotation edge and the second anti-rotation edge.

In some embodiments, the anti-rotation flange includes a plurality of anti-rotation flanges spaced apart in a circumferential direction of the insulator.

In some embodiments, the anti-rotation groove is a square groove.

In some embodiments, a side of the insulator facing the top cover plate has a boss, the positioning hole penetrates through the boss, and the boss penetrates through the through hole.

In some embodiments, a second chamfer is provided between the end face of the boss and the inner peripheral wall of the positioning hole.

In some embodiments, the boss has a third chamfer between the end face and the peripheral wall of the boss.

A battery according to an embodiment of the present invention includes a cap assembly for a battery as described above.

According to the battery of the embodiment of the utility model, the sealing cavity is formed by utilizing the pole, the pressing block, the insulating piece, the top cover plate and the insulating cover plate, and is communicated with the gap between the inner peripheral wall of the through hole and the outer peripheral wall of the main body part, when the sealing element is assembled in the sealing cavity, part of the structure of the sealing element is deformed under the action of the extrusion force, and part of the structure of the sealing element can block the opening, so that the sealing effect of the sealing element can be improved.

An energy storage device according to an embodiment of the present invention includes the battery as described above.

According to the energy storage device provided by the embodiment of the utility model, the sealing cavity is constructed by utilizing the pole, the pressing block, the insulating piece, the top cover plate and the insulating cover plate, and is communicated with the gap between the inner peripheral wall of the through hole and the outer peripheral wall of the main body part, when the sealing element is assembled in the sealing cavity, part of the structure of the sealing element is deformed under the action of the extrusion force, and part of the structure of the sealing element can block the opening, so that the sealing effect of the sealing element can be improved.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 is a front view of a cap assembly for a battery according to an embodiment of the present invention;

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

FIG. 3 is a schematic view of a portion of the structure of FIG. 2;

FIG. 4 is an enlarged partial schematic view at B of FIG. 3;

FIG. 5 is a schematic view of a portion of the structure of FIG. 2, without the inclusion of a post;

FIG. 6 is an enlarged partial schematic view at C of FIG. 5;

fig. 7 is a top view of a cap assembly for a battery according to an embodiment of the present invention;

fig. 8 is a perspective view of a cap assembly for a battery according to an embodiment of the present invention;

fig. 9 is an exploded view of a cap assembly for a battery according to an embodiment of the present invention;

fig. 10 is a cross-sectional schematic view of the pole of fig. 9;

FIG. 11 is a perspective view from one perspective of the compact of FIG. 9;

FIG. 12 is a perspective view from another perspective of the compact of FIG. 9;

FIG. 13 is a schematic cross-sectional view of the compact of FIG. 9;

FIG. 14 is a perspective view of one perspective of the insulator of FIG. 9;

FIG. 15 is a perspective view of the insulator of FIG. 9 from another perspective;

FIG. 16 is a front view of the insulator of FIG. 9;

FIG. 17 is a cross-sectional view of the insulator of FIG. 9;

FIG. 18 is a perspective view of one perspective of the insulating cover of FIG. 9;

FIG. 19 is a perspective view of the insulating cover of FIG. 9 from another perspective;

FIG. 20 is a front view of the insulating cover plate of FIG. 9;

FIG. 21 is a cross-sectional view of the insulating cover plate of FIG. 9;

FIG. 22 is a schematic partial structure view of FIG. 21;

fig. 23 is a schematic view of the fitting structure of the insulating cover plate and the current collector in fig. 9;

FIG. 24 is a sectional view in the direction F-F in FIG. 23;

FIG. 25 is a perspective view of one perspective of the top cover plate of FIG. 9;

FIG. 26 is a front view of the top cover plate of FIG. 9;

FIG. 27 is a perspective view of the top cover plate of FIG. 9 from another perspective;

fig. 28 is a front view of the header of fig. 9 with the header in a deployed state;

fig. 29 is a schematic structural view of the header of fig. 9, with the header in a folded condition;

fig. 30 is a schematic view of the configuration of the collector bar of fig. 9, with the collector bar in a folded state.

Reference numerals:

the top cover assembly (100) is provided with a cover,

an insulating cover plate 110, a mounting hole 111, a limiting rib 112, a first limiting rib 113, a second limiting rib 114, a third limiting rib 115, a reinforcing rib 116,

a stop 117, a protective flange 118, a hem 119,

a top cover plate 120, a through hole 121, a rotation-proof groove 122, a stop protrusion 123, a step 124,

an insulating member 130, a positioning hole 131, a boss 132, a second chamfer 133, a third chamfer 134, an embedding groove 135, an anti-rotation convex edge 136, a first anti-rotation edge 137, a second anti-rotation edge 138,

a pressing block 140, a limiting hole 141, a first chamfer 142, a first hole section 143, a second hole section 144, a third hole section 145, a tabling bulge 146,

the post 150, the body 151, the second flange 152, the first flange 153,

the seal cavity 154, the gap 155, the seal 156,

header 160, first fold 161, first groove 1611, second fold 162, second groove 1621,

a first portion 163, a second portion 164, a third portion 165, an enlarged section 166, relief notches 167, relief holes 168,

an explosion-proof hole 170, an explosion-proof valve 171, a liquid filling hole 172 and a liquid filling hole plug 173.

Detailed Description

Embodiments of the present invention will be described in detail below, the embodiments described with reference to the drawings being illustrative, and the embodiments of the present invention will be described in detail below.

A cap assembly 100 for a battery according to an embodiment of the present invention is described below with reference to fig. 1 to 30, the cap assembly 100 including: an insulating cover plate 110, a top cover plate 120, an insulator 130, a collector bar 160, and a pole 150. For example, the insulating cover 110 may be a lower plastic, and the insulating member 130 may be an upper plastic.

Specifically, as shown in fig. 1 to 3, the insulating cover plate 110, the top cover plate 120, the insulating member 130, and the compact 140 are sequentially stacked from bottom to top. As shown in fig. 5 and 6, the insulating cover plate 110 has a mounting hole 111, the top cover plate 120 has a through hole 121, the insulating member 130 has a positioning hole 131, and the pressing block 140 has a limiting hole 141, wherein the mounting hole 111, the through hole 121, the positioning hole 131, and the limiting hole 141 are sequentially opposite and communicated to form a through hole, and the pole 150 can be mounted in the through hole.

As shown in fig. 3 and 10, the pole 150 may include a main body 151 and a first convex edge 153, for example, the main body 151 is in a column shape, the first convex edge 153 is located at an edge of the other end of the main body 151, the first convex edge 153 protrudes out of a peripheral wall surface of the main body 151, and the first convex edge 153 extends in a circumferential direction of the main body 151.

The surface of the first flange 153 facing the insulating member 130, the inner peripheral wall of the mounting hole 111, and the surface of the top cover plate 120 facing the first flange 153 and protruding from the inner peripheral wall of the mounting hole 111 define a sealing cavity 154, and a sealing member 156 is disposed in the sealing cavity 154. For example, the top cover plate 120 is provided with an abutting projection protruding from the inner peripheral wall of the mounting hole 111 in the radial direction of the top cover plate 120, and at least a part of the abutting projection 123 is opposed to the mounting hole 111. The surface of the stop protrusion 123 facing the first convex edge 153 may define a sealing cavity 154 together with the surface of the first convex edge 153 facing the body 151 and the inner peripheral wall of the mounting hole 111.

Collector bar 160 is located the one side that insulating cover plate 110 deviates from top shroud 120, and collector bar 160 installs on the installation department, and collector bar 160 links to each other with utmost point post 150, can improve the reliability of collector bar 160's installation through setting up the installation department to do benefit to collector bar 160 and utmost point post 150's the steadiness of being connected. Meanwhile, the sealing effect of the top cover assembly 100 is guaranteed.

As shown in fig. 4, a gap 155 is provided between the inner peripheral wall of the through hole 121 and the outer peripheral wall of the body portion 151, and the gap 155 communicates with the seal chamber 154, that is, the seal chamber 154 has an opening at a position close to the gap 155, and the seal chamber 154 communicates with the gap 155 through the opening. Thus, when the sealing member 156 is assembled into the sealing chamber 154, the sealing member 156 is pressed by the inner wall of the sealing chamber 154, and under the action of the pressing force, part of the structure of the sealing member 156 is deformed, and since the sealing chamber 154 is communicated with the gap 155, the sealing member 156 is deformed toward the inside of the gap 155, and at this time, part of the structure of the sealing member 156 can block the opening, thereby improving the sealing effect of the sealing member 156.

According to the top cap assembly 100 for the battery of the embodiment of the present invention, by constructing the sealing cavity 154 using the post 150, the insulating member 130, the top cap plate 120 and the insulating cap plate 110, and the sealing cavity 154 communicates with the gap 155 between the inner circumferential wall of the through hole 121 and the outer circumferential wall of the body portion 151, when the sealing member 156 is fitted into the sealing cavity 154, a partial structure of the sealing member 156 is deformed by a pressing force, and the partial structure of the sealing member 156 may close the opening, whereby the sealing effect of the sealing member 156 may be enhanced.

As shown in fig. 3, the main body 151 is disposed through the positioning hole 131, the through hole 121 and the mounting hole 111, the second flange 152 abuts against the pressing block 140, and the first flange 153 abuts against the insulating cover 110. Here, the second convex edge 152 and the first convex edge 153 play a role in compressing and fixing the pressing block 140, the insulating member 130, the top cover plate 120 and the insulating cover plate 110 which are arranged in a stacked manner, so that the stability of the top cover assembly 100 can be improved. Further, the body 151 is inserted into the positioning hole 141, the positioning hole 131, the through hole 121, and the mounting hole 111, and the second flange 152 abuts against the pressing block 140.

In some embodiments, the compact 140, the insulating member 130, the top cover plate 120 and the insulating cover plate 110 are sandwiched between the second convex edge 152 and the first convex edge 153, so that the installation reliability of the terminal posts with the compact 140, the insulating member 130, the top cover plate 120 and the insulating cover plate 110 can be ensured, and meanwhile, the sealing effect can be improved.

In some examples, the sealing cavity 154 may be collectively configured with the post 150, the compact 140, the insulator 130, the top cover plate 120, and the insulating cover plate 110 to further improve the sealing of the top cover assembly 100.

In some embodiments, as shown in fig. 5, the sealing member 156 may be sleeved on the main body 151 and stop against the first flange 153. For example, the sealing member 156 is a sealing ring, the sealing ring is sleeved on the outer peripheral wall of the main body 151 and abuts against the first flange 153, and the sealing member 156 thus disposed can improve the mounting stability of the post 150, which is beneficial to improving the sealing effect.

In some embodiments, as shown in fig. 3, the top cover plate 120 may have a step 124, the step 124 abutting the seal. So, on the one hand can be convenient for fix a position the installation, on the other hand can do benefit to and improve sealed effect. For example, a step 124 is formed on the surface of the top cover plate 120 facing the first flange 153 and protruding from the inner circumferential wall of the mounting hole 111.

In some embodiments, the top cover assembly 100 includes a pressing block 140, the pressing block 140 is disposed on a side of the insulating member 130 facing away from the top cover plate 120, and a limiting hole 141 is disposed on the pressing block 150, and the limiting hole 141 is opposite to the positioning hole 131. Through setting up briquetting 140, briquetting 140 can further realize the sealed effect to top cap subassembly 100, and spacing hole 141 can be worn to locate by utmost point post 150.

In some embodiments, the pole further includes a second convex edge 152, the second convex edge 152 is located at an edge of the other end of the main body 151 (e.g., a side facing away from the current collecting bar 160), the second convex edge 152 protrudes from a peripheral wall surface of the main body 151, the second convex edge 152 extends along a circumferential direction of the main body 151,

for example, as shown in fig. 4 to 6, the through hole 121 has a smaller diameter than the mounting hole 111, and the positioning hole 131 has a smaller diameter than the through hole 121. Thus, the through hole formed by the through hole 121, the mounting hole 111, and the positioning hole 131 may be divided into a plurality of hole sections having different hole diameters.

According to some embodiments of the present invention, the cross-sectional area of the mounting hole 111 gradually decreases in the direction from the first rim 153 to the second rim 152. It will be appreciated that the cross-sectional area of the mounting hole 111 is gradually reduced, so that the peripheral wall of the mounting hole 111 can be configured as an inclined peripheral wall, and when the sealing member 156 is assembled into the mounting hole 111, the inclined peripheral wall has a pressing effect on the sealing member 156, so as to drive the sealing member 156 to deform toward the position having the gap 155, thereby improving the sealing effect of the sealing member 156.

In the example shown in fig. 13 and 6, the end of the stopper hole 141 facing the insulator 130 has a first chamfer 142. On one hand, the cutting stress during the processing of the pressing block 140 can be eliminated by utilizing the chamfer structure, so that the structural strength of the pressing block 140 can be improved; on the other hand, when the pole post 150 is assembled, the first chamfer 142 can be used to guide the pole post 150 to penetrate through the limiting hole 141, thereby playing a guiding role.

According to some embodiments of the utility model, as shown in fig. 13, the restraint aperture 141 may include a first aperture section 143, a second aperture section 144, and a third aperture section 145 that are in communication in series. Wherein the second rim 152 is positioned within the second bore section 144 and a portion of the body portion 151 is positioned within the third bore section 145. It will be appreciated that the second and

third bore sections

144, 145 may be used to receive the post 150. The radial dimension of the first hole section 143 is greater than the radial dimension of the second hole section 144, when the end of the pole 150 located at the second hole section 144 needs to be welded, the inner space of the first hole section 143 can be used for accommodating solder, when the end of the pole 150 located at the second hole section 144 needs to be riveted, the end of the pole 150 deforms to generate a protrusion after being riveted, and the inner space of the first hole section 143 can be used for accommodating the protrusion.

Further, as shown in fig. 3, the surface of the second convex edge 152 facing away from the first convex edge 153 is flush with the inner bottom wall of the first hole section 143. Therefore, the pole 150 is convenient to weld or rivet, and the pole 150 does not occupy the inner space of the first hole section 143, so that the first hole section 143 can accommodate the solder or the riveting protrusion of the pole 150, and the solder is prevented from overflowing or protruding out of the surface of the pressing block 140.

According to some embodiments of the present invention, as shown in fig. 3, 13 and 17, a side of the pressing block 140 facing the insulating member 130 has a fitting protrusion 146, a side of the insulating member 130 facing the pressing block 140 has a fitting groove 135, and the fitting protrusion 146 is fitted with the fitting groove 135. The height of the embedding convex part 146 protruding out of the surface of the pressing block 140 is H1, and the depth of the embedding groove 135 is H2, wherein H1 is more than H2. That is, the height of the fitting protrusion 146 is higher than that of the fitting groove 135, so that when the fitting protrusion 146 is fitted to the fitting groove 135, the fitting protrusion 146 will support the entire pressing block 140 to space the rest of the pressing block 140 from the insulating member 130, and under the assembling force of the top cap assembly 100, the fitting protrusion 146 will be in close contact with the inner bottom wall of the fitting groove 135, whereby the sealability between the pressing block 140 and the insulating member 130 can be improved. In order to prevent relative twisting between the pressing block 140 and the insulating member 130, in some embodiments, the fitting groove 135 is a square groove.

According to some embodiments of the present invention, as shown in fig. 14-16, a side of the insulating member 130 facing the top cover plate 120 has a boss 132, the positioning hole 131 penetrates through the boss 132, and the boss 132 penetrates through the through hole 121. Therefore, during assembly, the boss 132 can be inserted into the through hole 121 to achieve the pre-positioning function, so that the insulation member 130 and the top cover plate 120 can be assembled conveniently. Further, as shown in fig. 17, a second chamfer 133 is provided between the end surface of the boss 132 and the inner peripheral wall of the positioning hole 131, and a third chamfer 134 is provided between the end surface of the boss 132 and the outer peripheral wall of the boss 132.

It can be understood that, by providing the chamfer structure at the end corner in the radial direction of the boss 132, on one hand, the chamfer structure can be utilized to eliminate the cutting stress during the processing of the pressing block 140, so that the structural strength of the pressing block 140 can be improved; on the other hand, in the assembly, the boss 132 is guided into the through hole 121 by the guiding function of the third chamfer 134, and the guide pole 150 is inserted into the positioning hole 131 by the guiding function of the second chamfer 133, thereby performing the guiding function.

According to some embodiments of the present invention, as shown in fig. 25 and 26, the top cover plate 120 has an anti-rotation groove 122, and the through hole 121 is disposed in the anti-rotation groove 122. As shown in fig. 14-16, the peripheral wall of the insulating member 130 has anti-rotation flanges 136, and the anti-rotation flanges 136 are embedded in the anti-rotation grooves 122. In this way, when the insulator 130 is assembled with the top cover plate 120, the rotation preventing flanges 136 have a limiting effect on the insulator 130 in the circumferential direction of the through-holes 121, so that the insulator 130 can be prevented from rotating with respect to the top cover plate 120.

Further, as shown in fig. 14-16, the anti-rotation convex edge 136 includes a first anti-rotation edge 137 and a second anti-rotation edge 138, an included angle is formed between the first anti-rotation edge 137 and the second anti-rotation edge 138, the included angle may be 90 °, and the intersection of the first anti-rotation edge 137 and the second anti-rotation edge 138 is smoothly transited. Here, it should be noted that, as shown in fig. 16, when the insulating member 130 has a clockwise rotation tendency, the second anti-rotation edge 138 can be abutted against the inner peripheral wall of the anti-rotation groove 122, so as to play a role of anti-rotation; when the insulator 130 has a tendency of rotating counterclockwise, the first anti-rotation edge 137 can abut against the inner peripheral wall of the anti-rotation groove 122, so as to prevent rotation. In order to enhance the rotation prevention effect, in some examples, the rotation prevention rim 136 includes a plurality of rotation prevention rims 136, and the plurality of rotation prevention rims 136 are spaced apart in the circumferential direction of the insulator 130. Further, the anti-rotation groove 122 may be a square groove.

In some embodiments, as shown in FIGS. 25-26, in some embodiments, the top cover assembly 100 is provided with a blast hole 170 and a pour hole 172. It should be noted that the battery includes a top cover assembly, a battery cell and a cylindrical hard casing, one end of the hard casing is closed, the other end of the hard casing is open, the top cover assembly 100 can be disposed at the open end of the hard casing to seal the hard casing, and the battery cell is disposed inside the hard casing. The explosion-proof hole 170 penetrates through the top cover plate 120 and the insulating cover plate 110 in sequence, and the explosion-proof hole 170 is communicated with the interior of the hard shell; similarly, the pour hole 172 penetrates the top cover plate 120 and the insulating cover plate 110 in this order, and the pour hole 172 communicates with the inside of the hard case. In order to improve the safety of the battery, an explosion-proof valve 171 may be provided at the explosion-proof hole 170. In order to secure the sealing ring of the battery, the injection hole 172 may be sealed by the injection hole stopper 173 after the injection process is completed.

It should be noted that, as shown in fig. 23 and 24, the top cap assembly 100 may further include a collector bar 160, the collector bar 160 is welded to the pole 150, and the collector bar 160 is located on a side of the insulating cover plate 110 facing away from the insulating member 130. According to some embodiments of the present invention, the side of the insulating cover plate 110 facing away from the top cover plate 120 has a plurality of position-limiting ribs 112, and the plurality of position-limiting ribs 112 define position-limiting slots for limiting the installation position of the collector bar 160. It will be appreciated that the relative positions of the collector bar 160 and the post 150 may be positioned during welding of the collector bar 160 and the post 150, and that the assembly of the collector bar 160 may be facilitated by defining a detent with the spacing ribs 112 and positioning the collector bar 160 with the detent.

Here, the arrangement of the limiting ribs 112 is not specifically limited as long as it can limit the current collector 160, for example, as shown in fig. 19, fig. 20, and fig. 23, three limiting ribs 112 may be provided, which are a first limiting rib 113, a second limiting rib 114, and a third limiting rib 115, where the first limiting rib 113 and the second limiting rib 114 are parallel and opposite to each other, the current collector 160 is located between the first limiting rib 113 and the second limiting rib 114, between two parallel limiting ribs 112, the third limiting rib 115 is located at an end of the current collector 160, the third limiting rib 115 is parallel to an edge of the end of the current collector 160, and the third limiting rib 115 is perpendicular to the first limiting rib 113.

Further, in order to reinforce the structural strength of the insulating cover plate 110, as shown in fig. 19 and 20, a side of the insulating cover plate 110 facing away from the top cover plate 120 is provided with a plurality of reinforcing ribs 116. The plurality of ribs 116 are radially arranged around the mounting hole 111. Further, at least one of the reinforcing ribs 116 intersects with the position-limiting rib 112, so that at least one of the reinforcing ribs 116 and the position-limiting rib 112 form a crossed structure, thereby further improving the structural strength of the top cover plate 120 by using the crossed rib structure.

According to some embodiments of the present invention, as shown in fig. 20 to 22, a side of the insulating cover plate 110 facing away from the top cover plate 120 has a stopper 117, and the stopper 117 is used to support the current collecting bar 160. It should be noted that the collector bar 160 may be received at one side of the insulating cover plate 110 in a folding manner, and during the assembly process of the top cap assembly 100, the assembly force acts to press the collector bar 160, and by providing the stopping portion 117, not only the collector bar 160 may be supported, but also the collector bar 160 may be protected. Further, the stop 117 may be elongated, and the extension of the header 160 may be similar to the edge of the header 160, for example, the header 160 may be an arc-shaped rib. Further, as shown in fig. 20, there are two abutting portions 117, and the two abutting portions 117 are symmetrically distributed about the mounting hole 111. It should be noted that the shape of the stopping portion 117 is not limited to this, for example, in some embodiments, the stopping portion 117 is cylindrical, and the stopping portion 117 is a plurality of spaced apart portions.

In order to improve the assembly stability of the pole 150, in some embodiments, the side of the insulating cover plate 110 facing away from the top cover plate 120 has a protection flange 118, and the protection flange 118 surrounds the outer periphery of the pole 150. This increases the contact area between the inner peripheral wall of the mounting hole 111 and the pole 150, and protects and supports the pole 150 with the protective flange 118, thereby preventing the pole 150 from being deformed or inclined. In addition, the protection flange 118 has a function of reinforcing the structural strength of the insulating cover plate 110, that is, the protection flange 118 may function as a reinforcing rib 116, so as to reinforce the structural strength of the insulating cover plate 110.

As shown in fig. 18, according to some embodiments of the present invention, a side of the insulating cover plate 110 facing away from the top cover plate 120 has a flange 119, the flange 119 is located at an edge of the insulating cover plate 110, and the flange 119 extends in a circumferential direction of the insulating cover plate 110. On the one hand, the folded edge 119 has an effect of reinforcing structural strength to the insulating cover plate 110; on the other hand, by providing the folded edge 119, a nearly closed receiving space can be configured by using the structure of the folded edge 119 to receive the collector bar 160, and at the same time, the collector bar 160 can be protected to prevent the collector bar 160 from being squeezed and collided.

To better accommodate the header 160, in some embodiments, as shown in fig. 21 and 22, the height of the flap 119 is greater than the height of the stop 117. Therefore, the height difference between the folded edge 119 and the stopping part 117 can define a reserved space, and part of the structure of the header 160 can be accommodated in the reserved space. It should be noted that when the collector bar 160 is assembled with the insulating cover plate 110, the collector bar 160 needs to be folded, and since there are different layers of folding, the thicknesses of different parts on the collector bar 160 are different, and in order to better accommodate the folded collector bar 160, in some embodiments, as shown in fig. 21 and 22, the height of the abutting portion 117 is higher than the height of the protection flange 118, so that the height difference between the abutting portion 117 and the protection flange 118 may also define a reserved space to accommodate the collector bar 160. For example, as shown in fig. 22, the height of the folded edge 119 is L1, the height of the stopping portion 117 is L2, and the height of the protection flange 118 is L3, where L1 > L2 > L3.

To better protect the header 160, in some embodiments, the height difference between the flap 119 and the protective flange 118 is greater than the thickness of the space occupied by the header 160. In this way, the header 160 can be completely received in the space defined by the flap 119 and the stop 117. For example, the mounting portion may be a flange 119, a limiting rib 112, or other mounting structure, but is not limited thereto.

According to some embodiments of the present invention, as shown in fig. 28-29, the header 160 has a first fold 161 and a second fold 162, the first fold 161 and the second fold 162 being spaced apart in a length direction of the header 160, the first fold 161 and the second fold 162 each extending in a width direction of the header 160. The first and

second folds

161, 162 divide the current collector 160 into a first portion 163, a second portion 164 and a third portion 165, the first portion 163 being bent towards one side of the second portion 164 and welded to the pole post 150, and the third portion 165 being bent towards the other side of the second portion 164 to be welded to the cell.

It should be noted that when the header 160 is folded, it is folded in two different directions, such that the first portion 163 and the third portion 165 can be spaced apart from each other by the second portion 164, such that the first portion 163 and the post 150 are welded, the effect of the welding process on the third portion 165 can be reduced; similarly, when the third portion 165 is welded to the tab of the battery cell, the effect of the welding process on the first portion 163 may also be reduced.

In addition, the length of the first portion 163 is greater than the length of the second portion 164 in the length direction of the header 160. Thus, when the collector bar 160 is folded, the partial structure of the collector bar 160 may be staggered, so that the overall thickness of the folded collector bar 160 may have a stepwise change, on one hand, it is convenient to accommodate the collector bar 160 at one side of the insulating member 130; on the other hand, it is also convenient to provide functional areas or avoidance structures on different parts. For example, as shown in fig. 28 and 30, the third portion 165 has an enlarged section 166, the width of the enlarged section 166 is larger than that of the second portion 164, the enlarged section 166 has an escape notch 167, the escape notch 167 is used for avoiding the explosion-proof valve, and the escape notch 167 penetrates through a part of the edge of the enlarged section 166; further, the enlarged section 166 has an escape hole 168, the escape hole 168 being opposite the end of the pole 150.

In some embodiments, as shown in fig. 28, at least one of the first fold 161 and the second fold 162 extends along a straight line, which facilitates folding of the header 160. It should be noted that when the header 160 is folded, because the material of the header 160 is malleable, the material is easy to accumulate at the position of the fold, and in some embodiments of the present invention, as shown in fig. 28, both ends of the first fold 161 have first grooves 1611; likewise, both ends of the second fold 162 have second grooves 1621.

The battery according to the embodiment of the utility model comprises a battery core, a cylindrical hard shell and the top cover assembly 100 for the battery. It should be noted that the battery may be a single battery, and a plurality of single batteries may be assembled to form a battery pack, an energy storage device, or a charging station. One end of the hard shell is closed, the other end is opened, the open end of the hard shell can be arranged on the top cover component 100 so as to seal the hard shell, and the battery cell is arranged inside the hard shell. For example, the battery may be a secondary battery.

According to the battery of the embodiment of the utility model, by constructing the sealing cavity 154 by using the pole 150, the compact 140, the insulating member 130, the top cover plate 120 and the insulating cover plate 110, and the sealing cavity 154 is communicated with the gap 155 between the inner circumferential wall of the through hole 121 and the outer circumferential wall of the main body part 151, when the sealing member 156 is fitted into the sealing cavity 154, a part of the structure of the sealing member 156 is deformed by a pressing force, and a part of the structure of the sealing member 156 can close the opening, thereby improving the sealing effect of the sealing member 156.

An energy storage device according to an embodiment of the present invention includes the battery as described above. According to the energy storage device of the embodiment of the utility model, by constructing the seal cavity 154 by using the pole 150, the compact 140, the insulating member 130, the top cover plate 120 and the insulating cover plate 110, and communicating the seal cavity 154 with the gap 155 between the inner peripheral wall of the through hole 121 and the outer peripheral wall of the main body part 151, when the seal 156 is fitted into the seal cavity 154, a part of the structure of the seal 156 is deformed by a pressing force, and a part of the structure of the seal 156 can close off the opening, thereby improving the sealing effect of the seal 156.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example.

While embodiments of the utility model have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the utility model, the scope of which is defined by the claims and their equivalents.

Claims

1. A cap assembly for a battery, comprising:

the insulating cover plate is provided with a mounting hole and a mounting part;

the top cover plate and the insulating cover plate are arranged in a stacked mode, a through hole is formed in the top cover plate, and the through hole is opposite to the mounting hole;

the insulating piece is positioned on one side, away from the insulating cover plate, of the top cover plate, and is provided with a positioning hole, and the positioning hole is opposite to the through hole;

the current collecting bar is arranged on one side, away from the top cover plate, of the insulating cover plate, and the current collecting bar is installed on the installation part;

the polar column is connected with the current collecting bar and comprises a main body part and a first convex edge, the first convex edge is positioned at the edge of one end, facing the current collecting bar, of the main body part, the first convex edge protrudes out of the peripheral wall surface of the main body part, the main body part is arranged in the positioning hole, the through hole and the mounting hole in a penetrating mode, and the first convex edge is abutted to the insulating cover plate;

the first convex edge faces the surface of the insulating piece, the inner peripheral wall of the mounting hole, the top cover plate faces the first convex edge and protrudes out of the surface of the inner peripheral wall of the mounting hole to define a sealing cavity, a gap is formed between the inner peripheral wall of the through hole and the outer peripheral wall of the main body part, the gap is communicated with the sealing cavity, and a sealing piece is arranged in the sealing cavity.

2. The top cap assembly for a battery of claim 1, wherein the sealing member is disposed over the body portion and abuts against the first flange.

3. The cap assembly for a battery of claim 1, wherein the cap plate has a step that abuts the seal.

4. The cap assembly for a battery of claim 1, further comprising: the pressing block is arranged on one side, deviating from the top cover plate, of the insulating part, a limiting hole is formed in the pressing block, and the limiting hole is opposite to the positioning hole.

5. The top cap assembly for a battery according to claim 4, wherein a side of the pressing block facing the insulating member has a fitting protrusion, and a side of the insulating member facing the pressing block has a fitting groove, the fitting protrusion being engaged with the fitting groove.

6. The cap assembly for a battery of claim 4, wherein the post further comprises: the second chimb, the second chimb is located the edge of the other end of main part, second chimb protrusion in the all wall face of main part, the second chimb is followed the circumferential direction of main part extends, the second chimb with the briquetting ends.

7. The top cap assembly for a battery of claim 6, wherein the compact, the insulator, the top cap plate, and the insulating cap plate are sandwiched between the second rim and the first rim.

8. The top cap assembly for a battery of claim 6, wherein the mounting hole has a cross-sectional area that gradually decreases in a direction from the first rim to the second rim.

9. The top cap assembly for a battery of claim 8, wherein the retention apertures include a first aperture section, a second aperture section, and a third aperture section that are in series, the second flange is positioned within the second aperture section, a portion of the body portion is positioned within the third aperture section, and a radial dimension of the first aperture section is greater than a radial dimension of the second aperture section.

10. The cap assembly for a battery of claim 4, wherein the end of the limiting hole facing the insulator has a first chamfer.

11. The cap assembly for a battery according to any one of claims 1 to 10, wherein the cap plate has an anti-rotation groove, the through-hole is provided in the anti-rotation groove,

12. The top cap assembly for a battery of claim 11, wherein the anti-rotation bead includes a first anti-rotation edge and a second anti-rotation edge, the first anti-rotation edge and the second anti-rotation edge having an included angle therebetween.

13. The top cap assembly for a battery as claimed in claim 11, wherein the rotation-preventing flanges include a plurality of the rotation-preventing flanges spaced apart in a circumferential direction of the insulating member.

14. The cap assembly for a battery of claim 11, wherein the anti-rotation groove is a square groove.

15. The top cap assembly for a battery according to any one of claims 1 to 10, wherein a side of the insulating member facing the top cap plate has a boss, the positioning hole penetrates through the boss, and the boss is inserted into the through hole.

16. The top cap assembly for a battery of claim 15, wherein a second chamfer is provided between the end face of the boss and the inner peripheral wall of the locating hole.

17. The top cap assembly for a battery of claim 15, wherein a third chamfer is provided between the end face of the boss and the peripheral wall of the boss.

18. A battery comprising the cap assembly for a battery according to any one of claims 1-17.

19. An energy storage device comprising the battery of claim 18.