CN115719866B

CN115719866B - Sealing member, energy storage device and consumer

Info

Publication number: CN115719866B
Application number: CN202211537390.7A
Authority: CN
Inventors: 李茂松
Original assignee: Xiamen Hithium Energy Storage Technology Co Ltd
Current assignee: Xiamen Hithium Energy Storage Technology Co Ltd
Priority date: 2022-12-01
Filing date: 2022-12-01
Publication date: 2024-01-23
Anticipated expiration: 2042-12-01
Also published as: CN115719866A

Abstract

The invention discloses a sealing element, an energy storage device and electric equipment, wherein the sealing element comprises: the outer peripheral surface of the groove peripheral wall of the mounting groove is used for abutting against the hole wall of the liquid injection hole so as to seal the liquid injection hole; the driving piece is located in the mounting groove and is used for applying driving force to the peripheral wall of the groove towards the wall of the liquid injection hole, the sealing plug of the sealing piece is provided with the mounting groove, the peripheral surface of the peripheral wall of the groove of the mounting groove is abutted with the wall of the liquid injection hole, the liquid injection hole can be sealed, and the sealing piece can be taken out from the liquid injection hole when liquid injection is needed. In addition, the driving piece can apply the driving force towards the pore wall of the liquid injection hole to the circumferential wall of the groove, and then the butt between the sealing plug and the pore wall of the liquid injection hole is more compact, so that the sealing effect is better.

Description

Sealing member, energy storage device and consumer

Technical Field

The invention relates to the technical field of energy storage devices, in particular to a sealing piece of a liquid injection hole of an energy storage device and the energy storage device.

Background

In the manufacturing process of the energy storage device, the shell forms a sealing structure to ensure that the battery cell is isolated from the external environment, and electrolyte leakage is avoided. However, in the service life of the energy storage device, electrolyte loss can be caused by repeated charging and discharging, so that the service performance of the energy storage device is reduced.

Disclosure of Invention

The present invention aims to solve at least one of the technical problems existing in the prior art. Therefore, an object of the present invention is to provide a sealing member for a liquid injection hole of an energy storage device, which can achieve good sealing performance, and has a stable sealing structure and high working reliability. And moreover, the sealing piece can be detached from the liquid injection hole, so that the liquid injection operation is very convenient, and the utilization rate of the energy storage device is improved.

Another object of the present invention is to provide an energy storage device and an electric device having the energy storage device.

A seal according to an embodiment of the present invention includes: the outer peripheral surface of the groove peripheral wall of the mounting groove is used for abutting against the hole wall of the liquid injection hole so as to seal the liquid injection hole; and the driving piece is positioned in the mounting groove and is used for applying a driving force to the peripheral wall of the groove towards the wall of the liquid injection hole.

According to the sealing element disclosed by the embodiment of the invention, the mounting groove is formed in the sealing plug, the outer peripheral surface of the groove peripheral wall of the mounting groove is abutted against the hole wall of the liquid injection hole, so that the liquid injection hole can be sealed, and the sealing element can be taken out from the liquid injection hole when liquid injection is needed, so that the liquid injection operation is very convenient, and the electrolyte can be timely supplemented to improve the utilization rate of the energy storage device. In addition, the driving piece can apply the driving force towards the wall of the liquid injection hole to the peripheral wall of the groove, on one hand, the butt between the sealing plug and the wall of the liquid injection hole can be more compact, the sealing effect can be realized tightly, the sealing plug is prevented from being ejected out of the liquid injection hole, the risk of electrolyte leakage or air leakage is greatly reduced, and the sealing effect can be realized well.

In addition, the electrocardiograph according to the above embodiment of the present invention may have the following additional technical features:

according to some embodiments of the invention, the seal further comprises: the support piece comprises a support part extending along the circumferential direction of the groove circumferential wall, the support part is a cylinder body and is positioned between the groove circumferential wall and the annular spring, the annular spring is abutted against the inner circumferential surface of the support part, and the outer circumferential surface of the support part is abutted against the inner circumferential surface of the groove circumferential wall.

According to some embodiments of the invention, the driving member is a ring spring, multiple spring wires of the ring spring extend spirally around a 5-ring center line and are connected end to end, and the end of the supporting part near the bottom of the mounting groove is provided with a plurality of openings

And the open grooves are distributed at intervals along the circumferential direction of the supporting part.

According to some embodiments of the invention, the plurality of open grooves includes a first open groove and a second open groove disposed at intervals, and in an axial direction of the supporting portion, a height of the first open groove is greater than a length of the second open groove, and the second open groove is used for being in wire-clamping connection with the spring wire.

0 according to some embodiments of the invention, each of the second open slots is located between two adjacent first open slots.

According to some embodiments of the invention, a positioning groove is formed in the inner peripheral surface of the end portion, close to the bottom surface of the mounting groove, of the supporting portion, the positioning groove is recessed towards the side of the wall of the liquid injection hole, and the outer edge of the annular spring abuts against the positioning groove.

According to some embodiments of the invention, the annular spring is in a compressed state when assembled in the mounting groove. .

According to some embodiments of the invention, the driving member is a plug comprising a cylindrical portion and a first tapered portion 5, the cylindrical portion having an outer diameter greater than an inner diameter of an end of the support portion proximate a bottom of the mounting groove, the first tapered portion

A conical part is arranged on one side of the end face of the cylindrical part.

According to some embodiments of the invention, the support further comprises an end wall arranged at one end of the cylinder body away from the mounting groove, a limiting part is arranged at one side of the first conical part away from the cylindrical part, and the limiting part extends into the support part and abuts against the end wall.

0 according to some embodiments of the invention, the end wall has a through hole, and the stopper portion extends into the support portion and is penetrated

Is arranged in the through hole. According to some embodiments of the invention, the plug further comprises a second tapered portion provided on a side of the cylindrical portion remote from the first tapered portion, an outer diameter of the second tapered portion decreasing in a direction away from the cylindrical portion.

According to some embodiments of the invention, the support further comprises an end wall provided at an end 5 of the barrel remote from the mounting groove, the barrel, the end wall and the sealing plug cooperating to define a sealing chamber, the annular spring being located at the mounting groove

Sealing the cavity.

According to some embodiments of the invention, a portion of the support is located outside the mounting slot.

According to some embodiments of the invention, the support is made of metal.

According to some embodiments of the invention, the sealing plug is an elastic member.

0 according to some embodiments of the invention, the inner peripheral surface of the groove peripheral wall is provided with an inner convex portion, and the outer peripheral surface of the support portion

The mounting groove is provided with an outer protruding portion, and the outer protruding portion is clamped on one side, away from the notch of the mounting groove, of the inner protruding portion.

An energy storage device according to an embodiment of the present invention includes: the shell is provided with a liquid injection hole; according to the sealing piece of the liquid injection hole of the energy storage device, the sealing piece is detachably inserted into the liquid injection hole.

The electric equipment according to the embodiment of the invention comprises: an electric equipment body; according to the embodiment of the invention, the energy storage device is used for supplying power to the electric equipment body.

Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.

Drawings

The foregoing and/or additional aspects and advantages of the invention will become apparent and may be better understood from the following description of embodiments taken in conjunction with the accompanying drawings in which:

FIG. 1 is a schematic diagram of a cover and seal of an energy storage device according to an embodiment of the present invention;

FIG. 2 is a schematic structural view of a seal according to an embodiment of the present invention;

FIG. 3 is a cross-sectional view of FIG. 2;

fig. 4 is a schematic view of the structure of a sealing plug and a support according to an embodiment of the invention;

FIG. 5 is a schematic structural view of a seal according to an embodiment of the present invention;

FIG. 6 is a schematic structural view of a seal according to an embodiment of the present invention;

FIG. 7 is a cross-sectional view of FIG. 6;

FIG. 8 is a schematic structural view of a seal according to another embodiment of the present invention;

FIG. 9 is a schematic structural view of a seal according to yet another embodiment of the present invention;

fig. 10 is a schematic view of the structure of the sealing plug, the support and the chock according to an embodiment of the present invention.

Reference numerals:

a seal 100;

a sealing plug 10; a mounting groove 11; a groove peripheral wall 12; a liquid injection hole 13; an inner convex portion 14;

A driving member 20; a spring wire 21; an annular spring 22; a plug 23; a cylindrical portion 231; a first tapered portion 232; a second taper 233;

a support 30; a support 31; an open slot 311; a first open slot 3111; a second open slot 3112; an end wall 32; a sealed cavity 301; a mounting cavity 302; an outer flange 33; an opening 34; a positioning groove 35; a stopper 36; a spring body 37;

a housing 40; a cover 41.

Detailed Description

Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the invention.

In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present invention.

In the description of the invention, "a first feature" may include one or more such features, and "a plurality" may mean two or more, and that a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, or may include both the first and second features not being in direct contact but being in contact with each other through additional features therebetween, with the first feature "above", "over" and "above" the second feature including both the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature.

The seal 100 of the energy storage device liquid injection hole 13 and the energy storage device according to the embodiment of the present invention are described below with reference to the accompanying drawings.

Referring to fig. 1, an energy storage device according to an embodiment of the present invention may include: a housing 40 and a seal 100.

In particular, the housing 40 may serve as a housing for the energy storage device, providing a stable mounting environment for the internal structure (e.g., battery cells, etc.) of the energy storage device. And the housing 40 can isolate the internal structure of the energy storage device from the external environment, which is beneficial to ensuring the stable electrochemical performance of the energy storage device. As shown in fig. 1, the housing 40 may be provided with a pouring orifice 13. Specifically, during the manufacturing process, electrolyte may be injected into the case 40 through the injection hole 13; in the service life of the energy storage device, after electrolyte is lost due to multiple charging and discharging of the energy storage device, electrolyte can be injected into the energy storage device again through the liquid injection hole 13, so that the service life of the energy storage device is prolonged, and the utilization rate of the energy storage device is improved. In some specific embodiments, the housing 40 may include a cover 41, where the cover 41 is located at an end of the energy storage device, and the liquid injection hole 13 is located in the cover 41, so that the liquid injection operation may be more convenient.

In some related art, the injection hole is usually welded by a laser welding process after the electrolyte is injected, so as to avoid the electrolyte from exuding. However, because the welding has the characteristic of irremovable, a new fluid supplementing channel cannot be formed at the fluid injection hole of the sealing element and the cover body, so that fluid supplementing is difficult.

In this application, in order to overcome the problem that the filling hole and the sealing member are welded together to cause that the filling cannot be filled with liquid in the related art, as shown in fig. 1, the sealing member 100 is detachably inserted into the filling hole 13, so that, on one hand, when the electrolyte needs to be filled into the energy storage device, the sealing member 100 can be detached from the filling hole 13, the filling operation can be timely realized, and the filling operation is very convenient; when the energy storage device is required to work normally, the sealing element 100 can be directly inserted into the liquid injection hole 13, so that stable electrochemical performance of the energy storage device is ensured, and the installation and operation of the sealing element 100 are very convenient. On the other hand, the welding process is avoided to the sealing piece 100, the welding defect caused by the problem of the cleanliness of the welding parts is avoided, the welding process is avoided technically, the risk of poor sealing caused by welding is solved radically, and the production cost of the energy storage device is reduced.

A seal 100 for the fluid injection hole 13 of an energy storage device according to an embodiment of the present invention is described below with reference to fig. 2-10.

The seal 100 of the energy storage device filler hole 13 according to an embodiment of the present invention may comprise a sealing plug 10.

Specifically, as shown in fig. 2, 4, 6 and 8, the sealing plug 10 may have a mounting groove 11, and the mounting groove 11 may be used as a mounting space for other structures in the sealing element 100, which is beneficial to making the structural design of the sealing element 100 more reasonable. And the installation groove 11 can reduce the weight of the sealing plug 10, so that the operation of detaching the sealing element 100 from the liquid injection hole 13 can be more labor-saving. For example, in some embodiments, the mounting groove 11 is configured as a cylindrical groove, whereby the mounting groove 11 is shaped to facilitate processing of the article.

As shown in fig. 3, 5 and 7, the outer peripheral surface of the tank peripheral wall 12 of the mounting tank 11 can be abutted against the wall of the liquid injection hole 13, so that the sealing of the liquid injection hole 13 can be realized, for example, electrolyte inside the energy storage device is difficult to leak out through the liquid injection hole 13, impurity dirt in the external environment and the like are difficult to enter the energy storage device through the liquid injection hole 13, the beneficial effects can be realized by inserting the sealing plug 10 into the liquid injection hole 13, a welding process is not needed, the liquid injection operation of the energy storage device is very convenient, the sealing is not tight due to the problem of the welding process, and the production cost is reduced.

In order to make the abutment between the outer peripheral surface of the tank peripheral wall 12 and the wall of the liquid injection hole 13 more compact, the sealing member 100 may include a driving member 20, specifically, the driving member 20 is located in the installation groove, and the driving member 20 may be used to apply a driving force to the tank peripheral wall 12 toward the wall of the liquid injection hole 13, after the tank peripheral wall 12 receives the driving force of the driving member 20, the sealing plug 10 and the wall of the hole may be more compact in cooperation, which is more beneficial to reducing the gap between the sealing plug 10 and the wall of the hole, reducing the risk of leakage of the electrolyte, and further, the sealing effect achieved by the sealing member 100 is better.

For example, in some embodiments, after the sealing plug 10 is mounted in the pouring hole 13, the outer peripheral surface of the peripheral wall 12 of the mounting groove 11 is deformed to be in close contact with the wall of the pouring hole 13, thereby achieving a sealing effect. At the same time, the driving member 20 can apply a driving force to the groove peripheral wall 12 toward the wall of the liquid injection hole 13 to achieve a good sealing effect. In some specific embodiments, the driving member 20 may be an annular spring 22, where the annular spring 22 deforms when pressed by the groove peripheral wall 12, and generates a pre-tightening force, i.e. a driving force, on the sealing plug 10 in a direction towards the wall of the injection hole 13, so as to make the fit between the groove peripheral wall 12 and the wall of the hole more compact.

Under some working conditions of the energy storage device, air pressure is generated inside the energy storage device, the air pressure is rushed to the sealing piece 100, so that the sealing plug 10 deforms away from the hole wall direction, and the driving piece 20 can apply driving force to the groove peripheral wall 12, for example, in some embodiments, if the sealing plug 10 deforms, the driving piece 20 deforms by a larger amount, and further, the driving force generated by the driving piece 20 can keep the groove peripheral wall 12 and the hole wall of the liquid injection hole 13 tightly matched, so that a good sealing effect is achieved, and air flow is prevented from flowing out from a gap between the sealing plug 10 and the hole wall of the liquid injection hole 13.

It should be noted that, the sealing plug 10 in the embodiment of the present invention is made of a material with smaller hardness, and the sealing plug 10 can be in interference fit with the hole wall of the liquid injection hole 13 by using the elasticity of the sealing plug 10, so that the sealing plug 10 can be extruded to be attached to the inner wall surface of the liquid injection hole 13 to realize sealing. The sealing plug 10 can achieve a better sealing effect together with the driver 20, since the sealing plug 10 is easily deformed.

According to the sealing element 100 provided by the embodiment of the invention, the sealing plug 10 is provided with the mounting groove 11, the outer peripheral surface of the groove peripheral wall 12 of the mounting groove 11 is in butt joint with the hole wall of the liquid injection hole 13, so that the liquid injection hole 13 can be sealed, and the sealing element 100 can be taken out from the liquid injection hole 13 when liquid injection is needed, so that the liquid injection operation is very convenient, and the electrolyte can be timely supplemented to improve the utilization rate of the energy storage device. In addition, the driving member 20 can apply driving force to the peripheral wall 12 of the tank towards the wall of the liquid injection hole 13, so that the sealing plug 10 is in closer contact with the wall of the liquid injection hole 13, the sealing effect is tight, the risk of leakage or air leakage of electrolyte is greatly reduced, the sealing effect is better, and the electrochemical performance of the energy storage device is more stable.

Since the sealing member 100 of the liquid injection hole 13 of the energy storage device according to the embodiment of the invention has the beneficial technical effects described above, according to the energy storage device according to the embodiment of the invention, the sealing plug 10 is provided with the mounting groove 11, the outer circumferential surface of the groove peripheral wall 12 of the mounting groove 11 is abutted with the hole wall of the liquid injection hole 13, so that the liquid injection hole 13 can be sealed, and when liquid injection is required, the sealing member 100 can be taken out from the liquid injection hole 13, so that the liquid injection operation is very convenient, and the electrolyte can be timely supplemented to improve the utilization rate of the energy storage device. In addition, the driving member 20 can apply driving force to the peripheral wall 12 of the groove towards the wall of the liquid injection hole 13, so that the sealing plug 10 is in closer contact with the wall of the liquid injection hole 13, the risk of leakage or air leakage of electrolyte is greatly reduced, the sealing effect is better, and the electrochemical performance of the energy storage device is more stable.

According to some embodiments of the present invention, as shown in fig. 2-10, the seal 100 may further include a support 30. Specifically, the support 30 may include the support portion 31 extending in the circumferential direction of the groove peripheral wall 12, and the support portion 31 is a cylindrical body, which may facilitate the processing of the product of the support portion 31. The support portion 31 is located between the groove peripheral wall 12 and the annular spring 22, the annular spring 22 abuts against the inner peripheral surface of the support portion 31, and the outer peripheral surface of the support portion 31 abuts against the inner peripheral surface of the groove peripheral wall 12.

Specifically, in the sealed state, the driving force generated by the annular spring 22 acts on the support portion 31, and the support portion 31 transmits the driving force to the groove peripheral wall 12, so that the groove peripheral wall 12 and the wall of the liquid injection hole 13 can be brought into close contact with each other, thereby achieving the sealing effect. Since the support portion 31 is configured in a cylindrical shape, the contact area between the support portion 31 and the groove peripheral wall 12 is large, and the support portion 31 can relatively uniformly apply the driving force to the groove peripheral wall 12, so that the sealing effect of the sealing plug 10 can be received in any circumferential direction of the liquid injection hole 13, and the sealing effect can be improved. In addition, the supporting portion 31 can support the sealing plug 10, which is beneficial to prolonging the service life of the sealing plug 10, prolonging the service life of the sealing plug 10 and reducing the use cost of the sealing element 100.

In some embodiments of the present invention, as shown in fig. 3 and 6, the driver 20 may be an annular spring 22, with the multiple spring wires 21 of the annular spring 22 extending helically around the annular centerline and the multiple spring wires 21 being connected end to end. Thus, a particular configuration of the annular spring 22 may include multiple turns of the spring wire 21, with the multiple turns of the spring wire 21 being arranged along an annular centerline that passes through the helical center point of each turn of the spring wire 21. The resulting deformation of the structurally multi-turn spring wire 21 can be relatively independent and do not interfere with each other. For example, the ring spring 22 may be placed in the mounting groove 11, and the multi-turn spring wire 21 may form a multi-point pressing force on the supporting portion 31, which is beneficial to making the structural design of the seal member 100 more compact.

In addition, after the deformation of the annular spring 22 is increased due to the increase of the air pressure, the driving force of the annular spring 22 still keeps towards the hole wall of the liquid injection hole 13, and the axial outward force along the mounting groove 11 can not be applied to the sealing plug 10, so that the sealing plug 10 can be prevented from being axially ejected out of the liquid injection hole 13, and the stable electrochemical performance of the energy storage device can be ensured.

In addition, when one spring wire 21 fails, the driving force of the other spring wires 21 can act on the non-directly opposite position on the groove peripheral wall 12 through the supporting part 31, so that the sealing effect between the whole groove peripheral wall 12 and the wall of the liquid injection hole 13 is maintained, and the sealing failure preventing effect of the sealing element 100 is better. It should be noted that the specific configuration and type of the driving member 20 may be flexibly set according to practical requirements, for example, the driving member 20 may be an annular spring 22, a plug 23, or the like.

By the annular configuration of the annular spring 22, the multi-turn spring wire 21 of the annular spring 22 can be deformed relatively independently and without affecting each other. After the sealing member 100 is mounted in the liquid injection hole 13, there is a machining dimension error between the outer peripheral surface of the peripheral wall 12 of the mounting groove 11 and the wall of the liquid injection hole 13, resulting in risks of uneven stress and uneven sealing effect.

For example, the dimensions of the groove peripheral wall 12 are large enough to enable the groove peripheral wall 12 to closely abut against the wall of the liquid injection hole 13 at some positions, and the driving force required by the spring wire 21 corresponding to the position is small so as to meet the sealing requirement; the smaller size of the groove peripheral wall 12 in other positions makes the fit between the groove peripheral wall 12 and the wall of the liquid injection hole 13 weaker, and the spring wire 21 corresponding to the position can provide larger driving force, so that the sealing requirement can be met.

For another example, where the gas applies a greater pressure to the tank peripheral wall 12, the spring wire 21 corresponding to that location may provide a greater driving force to ensure tightness thereat, and where the gas applies a lesser pressure to the tank peripheral wall 12, the spring wire 21 corresponding to that location may only need to provide a lesser driving force to ensure tightness. Thus, the driving force is independently applied to different positions of the groove peripheral wall 12 by the plurality of spring wires 21, and the entire outer peripheral surface of the groove peripheral wall 12 of the mounting groove 11 and the wall of the liquid injection hole 13 can be closely matched, so that a better sealing effect can be achieved.

In addition, in this application scheme, as shown in fig. 2 and 3, the spring wire 21 of annular spring 22 encircles annular central line spiral extension, and every circle of spring wire 21 can produce deformation along the radial of annular central line, and every circle of spring wire 21 can produce deformation alone, and then is favorable to reducing annular spring 22 whole probability that takes place fatigue damage, and annular spring 22's fatigue resistance can be better, is favorable to improving annular spring 22's life. And, after the fatigue failure of a certain circle of spring wire 21, the whole annular spring 22 can not be failed, and other spring wires 21 can still provide driving force for the sealing plug 10, so that the safety accident caused by the great reduction of the sealing effect of the sealing piece 100 is avoided.

In some embodiments in which the driving member 20 is an annular spring 22, as shown in fig. 3 and 7, the annular center line is perpendicular to the axis of the groove peripheral wall 12, in other words, the annular spring 22 is laid in the mounting groove 11, the direction in which each coil of spring wire 21 generates deformation is perpendicular to the axis of the groove peripheral wall 12, and the spring wires 21 are distributed around the annular center line, and each coil of spring wire 21 can be in effective contact with the supporting portion 31, which is beneficial to enabling the coils of spring wire 21 to apply driving force to the supporting portion 31 more uniformly, and the sealing effect can be achieved.

For example, in a sealed state, the wall of the pouring hole 13 and the outer peripheral surface of the wall of the mounting groove 11 are pressed, so that both the sealing plug 10 and the annular spring 22 are deformed, and the annular spring 22 can be compressively deformed. After the sealing member 100 is assembled, the annular spring 22 releases the elastic force to provide the expansion force to the inner peripheral wall of the supporting member 30 toward the wall of the liquid injection hole 13, thereby realizing a tight sealing effect. In some specific embodiments where the annular spring 22 is horizontally placed, as shown in fig. 3, the annular spring 22 may be close to the bottom wall of the installation groove 11 in the installation groove 11, and the annular spring 22 may be located at the middle and lower part of the installation groove 11 as shown in fig. 3, so that the bottom wall of the installation groove 11 may support the annular spring 22, so that the working state of the annular spring 22 after installation is more stable, the annular spring 22 is prevented from being offset after being extruded by external force, and the sealing effect of the annular seal member 100 is prevented from being affected.

Also, in some embodiments in which the annular center line is perpendicular to the axis of the groove peripheral wall 12, as shown in fig. 4 and 5, the end of the support portion 31 near the groove bottom surface of the mounting groove 11 may be provided with a plurality of open grooves 311, for example, the open grooves 311 may be elongated grooves or the like, and the plurality of open grooves 311 may be distributed at intervals in the circumferential direction of the support portion 31, for example, uniformly at intervals in the circumferential direction of the support portion 31.

Thus, on one hand, at least part of the spring wire 21 of the annular spring 22 can be clamped with the open slot 311, and the open slot 311 can play a limiting role on the annular spring 22; on the other hand, the opening groove 311 can reduce the structural strength of the end of the supporting portion 31 near the bottom surface of the mounting groove 11, the annular spring 22 can enable the supporting portion 31 to deform more easily towards the groove peripheral wall 12, and the expanding force of the annular spring 22 can effectively drive the supporting portion 31 to expand and press the groove peripheral wall 12, so that the sealing effect achieved by the sealing member 100 is better.

In some embodiments in which the support 31 is provided with the plurality of open grooves 311, as shown in fig. 4 and 5, the plurality of open grooves 311 may include a first open groove 3111 and a second open groove 3112 that are disposed at intervals, and the first open groove 3111 may be provided in one or more, and the second open groove 3112 may be provided in one or more. Further, the length of the first open groove 3111 is longer than the length of the second open groove 3112 in the axial direction of the support 31, and the second open groove 3112 is adapted to be engaged with the spring wire 21.

Specifically, the second open slot 3112 is configured to clamp the spring wire 21, so as to avoid displacement of the annular spring 22, and the spring wire 21 can abut against an edge of the second open slot 3112 to effectively drive the support 31 to expand, which is beneficial to ensuring stability of operation of the annular spring 22 and sealing reliability of the sealing member 100.

Moreover, by appropriately setting the arrangement positions of the first open grooves 3111 and the second open grooves 3112 along the circumferential direction of the support 31, and the length of the second open grooves 3112, for example, two first open grooves 3111 may be arranged adjacently, and a spring body 37, for example, a long spring body 37 may be formed between the adjacent first open grooves 3111. Because the length of the first open slot 3111 is longer, the length of the formed elastic piece 37 is longer, when the annular spring 22 abuts against the elastic piece 37, the spring wire 21 can abut against the middle or middle lower position of the elastic piece 37 in the axial direction of the supporting portion 31, so that the elastic piece 37 is easier to deform towards the slot peripheral wall 12, and the sealing plug 10 is more tightly attached to the wall of the injection hole 13, thereby achieving a good sealing effect.

In some embodiments, as shown in fig. 4 and 5, each second open slot 3112 may be located between two adjacent first open slots 3111, so that a spring body 37 is formed between two adjacent first open slots 3111, and at least one spring body 37 is provided with a second open slot 3112, so that the spring body 37 can stably cooperate with the spring wire 21 and deform and expand under the expansion force of the spring wire 21. And the two second open grooves 3112 are not directly adjacent in the circumferential direction of the support portion 31, so as to avoid that the sheet body between the two second open grooves 31112 is not easily deformed by expansion. Thereby, uniformity of expansion of the supporting portion 31 around the circumference is ensured.

In some embodiments in which the support portion 31 includes the spring pieces 37, the spring pieces 37 may be uniformly spaced along the circumferential direction of the support portion 31, thereby facilitating a more uniform driving force to the groove peripheral wall 12 in the circumferential direction of the support portion 31 and a close fitting of the support portion 31 to the groove peripheral wall 12 in any direction.

In some embodiments in which the support portion 31 is provided with the open groove 311, as shown in fig. 4 and 5, the inner peripheral surface of the end portion of the support portion 31 near the bottom surface of the mounting groove 11 may be provided with a positioning groove 35, and the positioning groove 35 may be recessed toward the wall side of the pouring hole 13, for example, the positioning groove 35 may be an annular groove near the end portion of the inner peripheral surface of the support portion 31. The outer edge of the annular spring 22 abuts against the positioning groove 35. Therefore, the groove walls of the positioning grooves 35 can limit the annular spring 22 along the axial direction of the supporting portion 31, so that slipping and the like of the annular spring 22 are avoided, and the working state of the annular spring 22 is more stable. The annular spring 22 can be always kept at a position matched with the region of the supporting portion 31 where the opening groove 311 is provided, so that the annular spring 22 can be always kept at a position where the supporting portion 31 is effectively expanded, and the sealing effect is ensured.

In some embodiments where the supporting portion 31 is provided with the positioning groove 35, the cross section of the positioning groove 35 along the axial direction of the supporting portion 31 may be arc-shaped, so that the positioning groove 35 may be matched with the shape of the outer edge of the annular spring 22, and the spring wire 21 of the annular spring 22 may be fully contacted with the groove wall of the positioning groove 35, so that the limit effect can be achieved better.

In some embodiments of the present invention, the plane of each spring wire 21 is at an acute angle to the plane of the annular centerline, in other words, the plane of each spring wire 21 is at an acute angle to the annular centerline, and the plane of each spring wire 21 extends obliquely to the annular centerline, and the annular spring 22 may be formed as an oblique ring spring. And the specific degree of the acute angle can be flexibly set according to practical situations, for example, the angle can be 30 degrees, 50 degrees, 60 degrees, 70 degrees and the like.

By the above-described configuration of the ring spring 22, the driving force that the ring spring 22 can provide can be maintained within a more stable range in the sealing state of the seal 100. And under some conditions the driving force of the annular spring 22 does not decay too fast even after the annular spring 22 has been operated for a longer period of time.

In some embodiments, the plane of each circle of spring wire 21 and the plane of the annular center line form an acute angle, the extending direction of the opening slot 311 may be the same as that of the spring wire 21, so that the spring wire 21 may be clamped into the opening slot 311, and the opening slot 311 can limit the annular spring 22.

According to some embodiments of the present invention, the outer peripheral edge of the annular spring 22 abuts against the inner peripheral surface of the groove peripheral wall 12. In the sealed state, the driving force generated by the annular spring 22 can directly act on the inner peripheral surface of the groove peripheral wall 12, so that the outer peripheral surface of the groove peripheral wall 12 can be in contact with the wall of the liquid injection hole 13 more tightly, the leakage of electrolyte can be effectively avoided, and a good sealing effect is realized.

According to some embodiments of the present invention, when the annular spring 22 is assembled in the installation groove 11, the annular spring 22 is in a compressed state, and the expansion force generated by the annular spring 22 can act on the inner circumferential surface of the supporting portion 31, so that the outer circumferential surface of the supporting portion 31 can be tightly abutted against the sealing plug 10, and further the sealing plug 10 can be tightly abutted against the hole wall of the liquid injection hole 13, thereby realizing a good sealing effect and effectively avoiding leakage of electrolyte.

According to some embodiments of the present invention, as shown in fig. 8 to 10, the driving member 20 may be a stopper 23, and the stopper 23 may include a cylindrical portion 231 and a first tapered portion 232, and an outer circumferential surface of the cylindrical portion 231 should be fitted with an inner circumferential surface of the supporting portion 31 near a bottom wall of the installation groove 11. For example, the cylindrical portion 231 may be configured as a cylindrical body and the first tapered portion 232 may be configured as a tapered mesa structure. The outer diameter of the cylindrical portion 231 is larger than the inner diameter of the end portion of the support portion 31 near the bottom surface of the mounting groove 11, so that after the plug 23 is mounted on the support portion 31, the cylindrical portion 231 can apply a driving force (or expansion force) to the inner peripheral surface of the support portion 31 toward the groove peripheral wall 12, thereby tightly fitting the sealing plug 10 to the wall of the injection hole 13.

In addition, the first tapered portion 232 is provided at one side of the end surface of the cylindrical portion 231, and the specific configuration of the stopper 23 can make the assembling process of the sealing member 100 smoother. Specifically, during assembly, the first tapered portion 232 may be directed toward the opening of the support 31, and since the first tapered portion 232 is generally configured as a taper, the first tapered portion 232 smoothly enters the support 31, avoiding the first tapered portion 232 from interfering with the open end of the support 30. The support 30 equipped with the plug 23 is inserted into the mounting groove 11 and pressed downwards, the bottom surface of the cylindrical part 231 can be abutted against the bottom surface of the mounting groove 11, the cylindrical part 231 can be gradually pressed into the opening end of the support 30, the cylindrical part 231 presses the sealing plug 10 after expanding the opening end of the support 30, so that the sealing plug 10 is tightly attached to the wall of the liquid injection hole 13, and a good sealing effect is achieved.

In some embodiments of the driving member 20 that is the plug 23, as shown in fig. 8, the supporting member 30 may further include an end wall 32 disposed at an end of the barrel away from the mounting groove 11, and a limiting portion 36 is disposed on a side of the first tapered portion 232 away from the cylindrical portion 231, where the limiting portion 36 may abut against the end wall 32.

Therefore, in the process of assembling the seal member 100, after the support member 30 is pressed in place, the stopper 36 is abutted between the end wall 32 and the first tapered portion 232, so that the stopper 23 is prevented from being separated from the end portion of the support portion 31, which is close to the bottom surface of the mounting groove 11, due to excessive pressing, the stopper 23 is prevented from being unable to be held at the position of the opening end of the support member 30, and the sealing effect of the seal member 100 is ensured.

In some specific embodiments, the limiting portion 36 may be configured as a cylinder, which has a simple structure, is convenient for processing a workpiece, and can achieve a good supporting and limiting effect, and is stable and reliable in operation.

In some embodiments where the support 30 includes an end wall 32, as shown in fig. 9, the end wall 32 may have a through hole, the stopper 36 may extend into the support 31, and the stopper 36 may be disposed through the through hole. In some embodiments, the support 31 may be a cylinder, which is shaped to facilitate processing of the article. The support 30 further includes an end wall 32 provided at one end of the cylinder, and a side of the first tapered portion 232 facing the end wall 32 is provided with a limiting portion 36, for example, the limiting portion 36 may be configured as a cylinder. Also, the stopper 36 may be provided through the end wall 32.

Specifically, during the extrusion of the support 30, since the limiting portion 36 penetrates the end wall 32, the limiting portion 26 can protrude from the end wall 32 along with the extrusion of the support 30, for example, in some embodiments in which the limiting portion 36 is cylindrical, by reasonably setting the length of the limiting portion 36, for example, after the support 36 is in place, the limiting portion 36 protrudes from the end wall 32 by a predetermined value or is flush with the surface of the end wall 32, so that it can be known whether the extrusion of the support 30 should be continued, and whether the plug 23 is already in place in the support 31. In other words, the limiting portion 36 in this embodiment can perform a marking function, so as to avoid the excessive extrusion of the supporting member 30 and the separation of the plug 23 from the open end of the supporting portion 31, and ensure the sealing effect of the sealing member 100.

And in some embodiments in which the driver 20 is a plug 23, the plug 23 further includes a second taper 233, as shown in fig. 10. Specifically, the second tapered portion 233 may be provided on a side away from the first tapered portion 232, and the outer diameter of the second tapered portion 233 decreases in a direction away from the cylindrical portion 231, in other words, the outer diameter of the second tapered portion 233 is largest at an end closer to the cylindrical portion 231 and smallest at an end closer to the bottom surface of the mounting groove 11.

Specifically, after the plug 23 is extruded into the open end of the support member 30, the edge of the open end of the support member 30 is reversely extruded by the sealing plug 10 to inwards bend and wrap the plug 23 (towards the center line direction of the support member 30), so that creep (reverse rebound) of the support member 30 after long-term placement is avoided, sealing failure caused by sliding out of the plug 23 from the open end of the support member 30 is avoided, and sealing reliability of the sealing member 100 is effectively improved.

In some embodiments, as shown in fig. 2 and 4, the support 30 may further include an end wall 32 provided at an end of the barrel remote from the mounting slot 11. For example, the end wall 32 may be a circular sheet structure or the like.

And, the cylinder body, the end wall 32 and the sealing plug 10 can be matched to define a sealing cavity 301, namely, the end wall 32 and the cylinder body can seal the notch of the mounting groove 11 so that the space in the mounting groove 11 forms the sealing cavity 301; that is, the end wall 32 seals one end of the cylinder and the bottom wall of the installation groove 11 of the sealing plug 10 seals the other end of the cylinder to form the sealing chamber 301. The driver 20 may be located within the sealed cavity 301. Thus, the driving member 20 may be isolated from the external environment in the sealing cavity 301, which is beneficial to improving the working stability of the driving member 20, for example, in some embodiments in which the driving member 20 is an annular spring, the sealing cavity 301 can effectively avoid the annular spring 22 from contacting water and oxygen, avoid the annular spring 22 from rusting, and be beneficial to improving the service life of the annular spring 22.

In order to be able to monitor the external appearance of the driving member 20 in real time, in some embodiments, as shown in fig. 2, the supporting portion 31 may be configured as a cylinder, and an end of the cylinder remote from the bottom wall of the mounting groove 11 is opened. Thus, the appearance state of the driver 20 can be intuitively observed through the open end of the cylinder. For example, when the driving member 20 is deformed, rusted, etc., the driving member 20 may be replaced in time to reduce the potential safety hazard. And is advantageous in simplifying the structural design of the sealing member 100.

Alternatively, in other embodiments, as shown in fig. 3, the support member 30 may further include an end wall 32 disposed at one end of the support portion 31, and the support portion 31, the end wall 32, and the sealing plug 10 may cooperate to define a mounting cavity 302, and the driving member 20 may be disposed in the mounting cavity 302. In order to enable observation of the driver 20 in the mounting chamber 302, the support portion 31 may be provided with an opening 34 communicating with the mounting chamber 302, and for example, a notch may be provided in the support portion 31, whereby the appearance state of the driver 20 can be intuitively observed. Alternatively, the end wall 32 and the support 31 may have openings 34 in communication with the mounting cavity 302, which may allow for a larger area of the openings 34 and may allow for easier viewing of the driver 20.

In some embodiments in which the support member 30 includes an end wall 32 provided at one end of the support portion 31, as shown in fig. 6 and 7, the support portion 31 may be a half cylinder formed by cutting a cylinder into half along an axis, the end wall 32 may be a half-circular plate formed by cutting a circular plate into half along an axis, and the cut-out area may be regarded as the opening 34 for viewing the driving member 20, and in this way, the processing manner of the opening 34 may be made simpler, for example, the whole cylinder and the circular plate connected together may be cut to obtain two support members 30, which is advantageous in reducing the production cost.

In order to make the structural design of the seal 100 more compact and to provide higher operational reliability, in some embodiments, as shown in fig. 3, 5, and 7-10, the inner peripheral surface of the groove peripheral wall 12 may be provided with an inner protrusion 14, for example, the inner protrusion 14 may be configured as an annular protrusion structure. The outer peripheral surface of the support portion 31 may be provided with an outer flange 33, for example, the outer flange 33 may be configured as an annular convex structure. The outer protruding portion 33 is engaged with a side of the inner protruding portion 14 away from the notch of the mounting groove 11. Specifically, after the support member 30 is mounted on the sealing plug 10, the inner protruding portion 14 abuts against the outer protruding portion 33, so that the support member 30 can be limited to displace toward the notch direction of the mounting groove 11, the mounting state of the support member 30 can be more stable, the support member 30 is prevented from being separated from the sealing plug 10, and further the working reliability of the sealing member 100 is stronger. In addition, the displacement of the support member 30 can be limited by providing the inner protrusion 14 and the outer protrusion 33, which is beneficial to simplifying the structural design of the seal member 100.

In some embodiments, as shown in fig. 3-5 and 8-10, a portion of the support member 30 may be located outside the mounting groove 11, and this portion may be used as an operation end, through which the operation of removing and installing the sealing member 100 may be facilitated when the sealing member 100 is removed. For example, in some embodiments in which the support member 30 includes the support portion 30 and the end wall 32, as shown in fig. 3 to 5, a portion of the support portion 30 and the entire end wall 32 are located outside the mounting groove 11 and can serve as an operation end for assembling and disassembling the seal member 100, thereby facilitating the assembly and disassembly of the seal member 100 and simplifying the structure of the seal member 100.

In some embodiments, the support 30 may be a metal material, for example, the support 30 may be an aluminum material, a copper material, or the like. Specifically, the metal material is not easily damaged during use, which is beneficial to prolonging the service life of the support 30. In addition, by reasonably setting the thickness of the supporting piece 30, the supporting piece 30 can deform to transmit driving force, so that the outer peripheral surface of the groove peripheral wall 12 is tightly attached to the wall of the liquid injection hole 13, and a good sealing effect is realized.

In some embodiments, the sealing plug 10 is an elastic member, the hardness of the elastic member is small, and the elastic member can deform after being subjected to a driving force, so that the outer peripheral surface of the peripheral wall 12 of the groove is tightly abutted against the wall of the liquid injection hole 13. For example, the elastic member may be made of rubber. In addition, the sealing plug 10 can generate corresponding deformation according to the driving force of the driving piece 20, any area of the peripheral wall 12 of the groove can be abutted against the wall of the liquid injection hole 13, the leakage of electrolyte is effectively avoided, and the sealing effect is better.

The electric equipment provided by the embodiment of the invention can comprise an electric equipment body and the energy storage device provided by the embodiment of the invention, wherein the energy storage device can be used for supplying power to the electric equipment body so as to ensure that the electric equipment body can work normally.

Because the energy storage device according to the embodiment of the invention has the beneficial technical effects, according to the electric equipment provided by the embodiment of the invention, the mounting groove 11 is arranged on the sealing plug 10, the outer peripheral surface of the groove peripheral wall 12 of the mounting groove 11 is abutted with the wall of the liquid injection hole 13, the liquid injection hole 13 can be sealed, and the sealing element 100 can be taken out from the liquid injection hole 13 when liquid injection is needed, so that the liquid injection operation is very convenient, and electrolyte can be timely supplemented to improve the utilization rate of the energy storage device. In addition, the driving piece 20 can apply driving force towards the wall of the liquid injection hole 13 to the groove peripheral wall 12, so that the butt joint between the sealing plug 10 and the wall of the liquid injection hole 13 is tighter, the risk of electrolyte leakage or gas leakage is greatly reduced, the sealing effect can be realized better, the electrochemical performance of the energy storage device is more stable, and the electricity utilization stability of electric equipment is further ensured. Other configurations and operations of seals 100, energy storage devices, and powered devices according to embodiments of the present invention are known to those of ordinary skill in the art and will not be described in detail herein.

In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.

In the description herein, reference to the terms "embodiment," "specific embodiment," "example," and the like, means 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 invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

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

Claims

1. A seal for a liquid injection port of an energy storage device, comprising:

the outer peripheral surface of the groove peripheral wall of the mounting groove is used for abutting against the hole wall of the liquid injection hole so as to seal the liquid injection hole;

a driving member located in the mounting groove and configured to apply a driving force toward the wall of the pouring hole to the groove peripheral wall;

a support member having a support portion extending in a circumferential direction of the groove peripheral wall, the support portion being a cylindrical body and being located between the groove peripheral wall and the driving member, the driving member abutting against an inner peripheral surface of the support portion, an outer peripheral surface of the support portion abutting against an inner peripheral surface of the groove peripheral wall;

the driving piece is an annular spring, a plurality of spring wires of the annular spring extend spirally around an annular central line and are connected end to end,

the end part of the supporting part, which is close to the bottom surface of the mounting groove, is provided with a plurality of open grooves, and the open grooves are distributed at intervals along the circumferential direction of the supporting part.

2. The seal for a liquid injection hole of an energy storage device of claim 1, wherein the plurality of open slots includes a first open slot and a second open slot disposed at intervals, the first open slot having a length greater than a length of the second open slot in an axial direction of the support portion, the second open slot being adapted to be in snap-engagement with the spring wire.

3. The seal for a fluid injection well of an energy storage device of claim 2, wherein each of said second open slots is located between two adjacent ones of said first open slots.

4. The sealing member for a liquid injection hole of an energy storage device according to claim 1, wherein a positioning groove is formed in an inner peripheral surface of an end portion of the supporting portion, which is close to a bottom surface of the installation groove, the positioning groove is recessed toward a side of the liquid injection hole wall, and an outer edge of the annular spring abuts against the positioning groove.

5. The seal for a fluid injection port of an energy storage device of claim 1, wherein said annular spring is compressed when assembled in said mounting groove.

6. The seal for a fluid injection port of an energy storage device of claim 1, wherein said support further comprises an end wall disposed at an end of said barrel remote from said mounting groove, said barrel, said end wall and said sealing plug cooperatively defining a sealed cavity, said driver being disposed within said sealed cavity.

7. The seal for a fluid injection port of an energy storage device of claim 1 wherein an end wall of said support member is located outside of said mounting groove.

8. The seal for a liquid injection hole of an energy storage device of claim 1, wherein the support is a metal material.

9. The seal for a fluid injection port of an energy storage device of claim 1 wherein said sealing plug is an elastomeric member.

10. The sealing member for a liquid injection hole of an energy storage device according to claim 1, wherein an inner protruding portion is provided on an inner peripheral surface of the peripheral wall of the groove, an outer protruding portion is provided on an outer peripheral surface of the supporting portion, and the outer protruding portion is clamped to a side, away from the notch of the installation groove, of the inner protruding portion.

11. An energy storage device, comprising:

the shell is provided with a liquid injection hole;

the seal for a fluid injection port of an energy storage device of any one of claims 1-10, the seal removably inserted within the fluid injection port.

12. A powered device, comprising: an electric equipment body; the energy storage device of claim 11, the energy storage device configured to power the powered device body.