CN115332741A

CN115332741A - Storage battery

Info

Publication number: CN115332741A
Application number: CN202210961043.0A
Authority: CN
Inventors: 张小明; 李海军; 李聪利
Original assignee: Gree Altairnano New Energy Inc
Current assignee: Gree Altairnano New Energy Inc
Priority date: 2022-08-11
Filing date: 2022-08-11
Publication date: 2022-11-11

Abstract

The invention relates to the technical field of batteries, in particular to a storage battery. The method comprises the following steps: the shell assembly is connected with the sealing cover and forms an accommodating cavity with the sealing cover; the battery pack sets up in holding the chamber, is provided with check valve on the closing cap, and check valve has open mode and closure state, and when the battery annotates the liquid, check valve is in the open mode, and when the battery used, check valve was in the closure state. The one-way valve can be opened and closed stably all the time, and has stable and reliable work and good sealing performance. The external force acting on the valve core of the one-way valve is the electrolyte injection interface, but not the hydraulic pressure of the electrolyte. The one-way valve is convenient and quick in liquid injection, and only external force is required to act on the valve core of the one-way valve. The one-way valve is automatically reset, so that the condition of manual filling or extrusion does not exist, namely, the influence of human factors on the one-way valve is small, and the service life is longer.

Description

Storage battery

Technical Field

The invention relates to the technical field of batteries, in particular to a storage battery.

Background

All need add electrolyte in general battery, when actual operation, pour into electrolyte through annotating the liquid mouth on the battery, then will annotate the liquid mouth with the plug and stuff, although the plug can play sealed effect of annotating the liquid mouth, nevertheless owing to manual operation, it packs not in place to appear the plug easily, leads to the sealed condition that became invalid of plug or plug to drop to take place, especially after the flexible glue plug is through long-term use, owing to take place the condition such as plastic deformation or wearing and tearing, the sealing performance greatly reduced of plug.

Disclosure of Invention

The invention provides a storage battery, which aims to solve the problem of poor sealing performance of the conventional storage battery.

The technical scheme of the invention is as follows:

a battery, comprising: the device comprises a shell assembly, an electric core assembly and a sealing cover, wherein the shell assembly is connected with the sealing cover and forms an accommodating cavity with the sealing cover; the battery pack sets up hold in the chamber, be provided with check valve on the closing cap, check valve has open mode and closure state, and when the battery annotates the liquid, check valve is in the open mode, and when the battery used, check valve is in the closure state.

Preferably, the battery further includes: the sealing piece is arranged on the sealing cover and is positioned on one side of the one-way valve, the sealing piece is separated from the sealing cover when the storage battery is filled with liquid, and the sealing piece is connected with the sealing cover when the storage battery is used.

Preferably, the one-way valve includes: a filling opening, a resetting piece and a closing piece, wherein the filling opening is arranged on the closing cover; the injection opening and the closing piece are respectively connected with the resetting piece, and when the one-way valve is in a closed state, the closing piece is connected with the injection opening to close the injection opening; when the one-way valve is in an open state, the filling opening is separated from the closing piece.

Preferably, the sealing sheet is located on one side of the closure, the sealing sheet being located opposite the pouring aperture.

Preferably, the closure comprises: the sealing piece is arranged on the cover plate, and the one-way valve is arranged on the insulating plate.

Preferably, the closure comprises: the cover plate is connected with the insulating plate, and the insulating plate is connected with the shell assembly.

Preferably, the insulating plate includes: insulator and buffer structure, insulator includes: the check valve is arranged on the first body or the second body; the buffer structure is arranged between the first body and the second body and deforms under the action of the first body and the second body.

Preferably, the buffer structure includes: the arc strip, the one end of arc strip with first this body coupling, its other end with this body coupling of second, it is a plurality of the arc strip sets up side by side.

Preferably, the insulating plate is provided with a protrusion, and the protrusion is connected with the housing assembly or the electric core assembly, so that a set gap is formed between the insulating plate and the electric core assembly.

Preferably, the insulation board with the casing subassembly passes through the joint subassembly and is connected, and two sets of joint subassembly sets up the relative both sides of insulation board.

Preferably, the electric core assembly comprises: the battery cell comprises a battery cell and a pole column, wherein the pole column is connected with the battery cell, a positioning groove is formed in the sealing cover, and the pole column is embedded into the positioning groove.

Preferably, utmost point post includes base station and boss, the boss sets up on the base station, the boss embedding the constant head tank, the base station with the outer edge of constant head tank offsets.

Preferably, the storage battery further comprises a sealing ring, the sealing ring is sleeved on the outer side of the base platform, the base platform and the sealing ring are abutted to the outer edge of the positioning groove, and a conical surface abutted to the sealing cover is arranged on the sealing ring.

Preferably, the housing assembly comprises: the protective support is arranged in the base and connected with the sealing cover to form an accommodating cavity.

The technical scheme of the invention has the following beneficial effects:

the storage battery of the present invention includes: the shell assembly is connected with the sealing cover and forms an accommodating cavity with the sealing cover; the battery pack sets up in holding the chamber, is provided with check valve on the closing cap, and check valve has open mode and closure state, and when the battery annotates the liquid, check valve is in the open mode, and when the battery used, check valve was in the closure state. The one-way valve can be opened and closed stably all the time, and has stable and reliable work and good sealing performance. The external force acting on the valve core of the one-way valve is the electrolyte injection interface, but not the hydraulic pressure of the electrolyte. The one-way valve is convenient and quick in liquid injection, and only external force is required to act on the valve core of the one-way valve. The one-way valve is automatically reset, so that the condition of manual filling or extrusion does not exist, namely the influence of human factors on the one-way valve is small, and the service life of the one-way valve is longer than that of a rubber plug.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the prior art descriptions will be briefly described below, it is obvious that the drawings in the following descriptions are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.

Fig. 1 is a schematic view of an exploded view of the battery of the present invention;

FIG. 2 is a schematic view of the insulating plate shown in FIG. 1;

FIG. 3 is a schematic view of the protective bracket shown in FIG. 1;

FIG. 4 is a schematic view of the pole shown in FIG. 1;

fig. 5 is a schematic view of the seal ring shown in fig. 1.

Description of reference numerals:

1-a housing assembly; 2-an electrical core assembly; 3-sealing the cover; 4-sealing the sheet; 5-one-way valve; 6-injection port; 7-a reset piece; 8-a closure; 9-cover plate; 10-an insulating plate; 11-an insulating body; 12-a buffer structure; 13-a first body; 14-a second body; 15-a projection; 16-buckling; 17-a card slot; 18-electric core; 19-pole column; 20-base station; 21-a boss; 22-a sealing ring; 23-a conical surface; 24-a base; 25-a protective support; 26-a bottom plate; 27-a support plate; 28-positioning grooves; 29-a limit protrusion; 30-a collector plate; 31-via.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood as appropriate to those of ordinary skill in the art.

In addition, the technical features involved in the different embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.

The battery of the present embodiment, as shown in fig. 1 to 5, includes: the battery cell module comprises a shell assembly 1, a battery cell assembly 2 and a sealing cover 3, wherein the shell assembly 1 is connected with the sealing cover 3 and forms an accommodating cavity with the sealing cover 3; the battery pack assembly 2 is arranged in the accommodating cavity, the sealing cover 3 is provided with a one-way valve 5, and the one-way valve 5 has an opening state and a closing state. When the one-way valve 5 is in an open state, the electrolyte can only flow in one direction, namely, the electrolyte flows into the accommodating cavity from the one-way valve 5, and cannot flow out from the accommodating cavity.

The one-way valve 5 is initially in a closed state, and when the storage battery is filled with liquid, external force acts on a valve core of the one-way valve 5 to enable the one-way valve 5 to be in an open state, and electrolyte is injected through the one-way valve 5. After the liquid injection is completed, the external force is separated from the one-way valve 5, and the one-way valve 5 is restored to the closed state. Compared with the connection mode of the rubber plug in the prior art, the storage battery of the embodiment has the advantages that the one-way valve 5 is opened under the action of external force, the one-way valve 5 is automatically closed when the external force acting on the one-way valve 5 disappears, and compared with the connection mode of the existing rubber plug, the one-way valve 5 can be always and stably opened and closed, the work is stable and reliable, and the sealing performance is good. It should be noted that, in the present embodiment, the external force acting on the valve element of the check valve 5 is the electrolyte injection port, not the hydraulic pressure of the electrolyte itself.

And the check valve 5 in this embodiment is convenient and fast when annotating the liquid, only need external force act on the case of check valve 5 can. The one-way valve 5 is automatically reset, so that the condition of manual filling or extrusion does not exist, namely, the influence of human factors on the one-way valve is small, and the service life of the one-way valve is longer than that of a rubber plug.

Wherein, check valve 5 includes: a pouring opening 6, a restoring piece 7 and a closing piece 8, wherein the pouring opening 6 is arranged on the cover 3; the injection opening 6 and the closing piece 8 are respectively connected with the resetting piece 7, and when the one-way valve 5 is in a closed state, the closing piece 8 is connected with the injection opening 6 to close the injection opening 6; when the one-way valve 5 is in the open state, the pouring opening 6 is separated from the closing member 8. In this embodiment, the sealing member 8 is a valve core of the check valve 5.

In use, external force acts on the closing member 8, so that the closing member 8 is separated from the injection opening 6, and at the moment, the electrolyte can be injected into the accommodating cavity through the injection opening 6, and charging and discharging are realized through the action of the electrolyte and the electric core assembly 2. After the liquid injection is completed, the external force is separated from the closing piece 8, and at the moment, the closing piece 8 is reset under the action of the resetting piece 7, and the injection opening 6 is closed.

Specifically, the injection port 6 in this embodiment is a U-shaped groove, one end of the reset member 7 abuts against the bottom of the U-shaped groove, the other end of the reset member is connected to the U-shaped groove closing member, a through hole is formed in the U-shaped groove, and when an external force acts on the closing member 8, the electrolyte enters from the opening of the U-shaped groove and then flows into the accommodating cavity through the through hole formed in the U-shaped groove.

As an alternative embodiment, the check valve 5 in this embodiment may adopt other existing check valves, such as a gravity check valve.

The battery of this embodiment, still include: the sealing piece 4 is arranged on the sealing cover 3 and is positioned on one side of the one-way valve 5, when the storage battery is filled with liquid, the sealing piece is separated from the sealing cover 3, and when the storage battery is used, the sealing piece is connected with the sealing cover 3. The gasket 4 can prevent when need not annotate the liquid, and the check valve 5 is in the closed condition when, the mistake touches check valve 5, leads to check valve 5 to open to play double seal's effect. Specifically, the sealing sheet 4 is located on one side of the closure 8, and the sealing sheet 4 is disposed opposite the injection port 6.

Specifically, the electric core assembly 2 includes: electric core 18 and utmost point post 19, utmost point post 19 are connected with electric core 18, are provided with constant head tank 28 on the closing cap 3, and utmost point post 19 embedding constant head tank 28, closing cap 3 adopt the mode of embedding with utmost point post 19 to be connected, can avoid reducing the position change degree of closing cap 3 because of the deformation that the welding produced, promote the sealing performance of this battery. Further, the electric core assembly 2 further comprises: the collector plate 30, the collector plate 30 and the pole 19 are processed into an integral structure, the traditional welding connection mode of the collector plate and the pole 19 is changed, and deformation generated by the welding connection mode is eliminated. In the present embodiment, the battery cell 18 has a tab, and the battery cell 18 is connected to the pole 19 by welding through the tab. Specifically, in this embodiment, the multiple battery cells 18 and the current collecting plate 30 at the bottom of the pole 19 may be directly ultrasonically welded, so that the welding is firm and the thermal influence is low.

Wherein, utmost point post 19 includes base station 20 and boss 21, and boss 21 sets up on base station 20, and boss 21 imbeds constant head tank 28 and extends the upper surface of constant head tank 28, and base station 20 offsets with the outer edge of constant head tank 28. Boss 21 is connected with constant head tank 28 with the mode of embedding, so need not to weld boss 21 and constant head tank 28 again, avoids because of the deformation that the welding produced, connects more swiftly convenient with the mode of embedding simultaneously. In the orientation shown in fig. 1, boss 21 extends above the upper surface of detent 28 to prevent fusing of detent 28 during soldering of post 19 to a wire.

Wherein the cover 3 comprises: the cover plate 9 is connected with the insulating plate 10, the insulating plate 10 is connected with the shell assembly 1, the sealing sheet 4 is arranged on the cover plate 9, and the one-way valve 5 is arranged on the insulating plate 10. Specifically, the insulating plate 10 has a structural size adapted to the housing assembly 1, and when the insulating plate 10 is coupled to the housing assembly 1, the edge of the insulating plate 10 is in close contact with the housing assembly 1 to prevent gas or liquid from leaking from the gap between the insulating plate 10 and the housing assembly 1.

And a limiting bulge 29 is further arranged on the insulating plate 10, and the cover plate 9 and the insulating plate 10 are quickly connected through the limiting bulge 29. As an alternative embodiment, the cover plate 9 and the insulating plate 10 may be provided as an integral structure.

Furthermore, the positioning groove is arranged on the cover plate 9, a through hole 31 is also arranged on the insulating plate 10, and when the storage battery is assembled, the pole 19 passes through the through hole 31 to be connected with the positioning groove 28.

The edge of the cover plate 9 is provided with a tongue-and-groove, the cover plate 9 is connected with the shell assembly 1 through the tongue-and-groove, so that part of the cover plate 9 extends into the shell assembly 1, and the other part covers the port of the shell assembly 1. Through setting up the tongue-and-groove for sealing performance is better between apron 9 and the casing subassembly 1, eliminates leading to between apron 9 and the casing subassembly because of the closure untight laser or welding slag fall into and hold the intracavity, and then lead to the battery short circuit, need not to set up limit structure again on the casing subassembly simultaneously.

Wherein, insulating board 10 includes: insulator 11 and buffer structure 12, insulator 11 includes: a first body 13 and a second body 14, the one-way valve 5 being arranged on the second body 14, the one-way valve 5 being, as an alternative embodiment, arranged on the first body 13. As an alternative embodiment, a person skilled in the art may provide a plurality of first bodies 13 or second bodies 14.

In the storage battery of the embodiment, when the battery cell 18 is welded to the current collecting plate 30 at the bottom of the terminal post 19, the welding may cause a gap to be formed between the insulating plate 10 and the casing assembly 1, which may cause leakage of the electrolyte or gas discharge, and in addition, the contraction or expansion of the gas inside the accommodating cavity may also cause a change in the shape of the casing assembly 1, which may cause a gap to be formed between the insulating plate 10 and the casing assembly 1, and in addition, the heat generated during the charging and discharging of the battery may also cause a gap to be formed between the insulating plate 10 and the casing assembly 1. In this embodiment, after the position and the shape of the first body 13, the second body 14, or the housing assembly 1 are changed, the buffer structure 12 is deformed, and under the action of the buffer structure 12, the first body 13, the second body 14 and the housing assembly 1 are still in sealing contact with each other, so as to ensure the sealing effect of the battery of this embodiment.

The buffer structure 12 includes: the arc strip, the one end and the first body 13 of arc strip are connected, and its other end is connected with second body 14, and a plurality of arc strips set up side by side, and when taking place deformation, the arc strip takes place crooked, need explain that, the deformation volume when taking place deformation of each arc strip is not required the same. As alternative embodiments, the buffer structure 12 may be configured as other structures capable of deforming, such as a rubber or spring configured as the buffer structure 12, or a corrugated shape configured by changing the shape of the arc-shaped bars.

Further, be provided with bulge 15 on insulation board 10, bulge 15 is connected with electric core subassembly 2 for form between insulation board 10 and the electric core subassembly 2 and set for the clearance, through setting up a plurality of bulges 15, the utmost point ear of fixed electric core 18 rocks, realizes stabilizing the connection between utmost point ear and the utmost point post 19 of electric core 18. The projections 15 are supported on the electric core assembly 2. As an alternative embodiment, the projections 15 can be connected to the housing assembly 1 and supported on the housing assembly 1. Note that the tab of the battery cell 18 is an elastic sheet that can be elastically deformed.

Specifically, insulation board 10 and housing assembly 1 are connected through the joint subassembly, and two sets of joint subassemblies are arranged in the opposite both sides of insulation board 10, and the joint subassembly includes buckle 16 and draw-in groove 17 that match each other, and wherein, buckle 16 sets up on housing assembly 1, and draw-in groove 17 sets up on insulation board 10, and of course those skilled in the art can exchange the position of buckle 16 and draw-in groove 17, namely draw-in groove 17 sets up on housing assembly 1, sets up buckle 16 on insulation board 10. When assembling the battery of this embodiment, realize insulation board 10 and housing assembly 1 high-speed joint through buckle 16 and draw-in groove 17, because insulation board 10 is connected with apron 9, technical staff accessible buckle 16 and draw-in groove 17 realize closing cap 3 and housing assembly 1 high-speed joint.

The storage battery of the embodiment further comprises a sealing ring 22, the sealing ring 22 is sleeved outside the base 20, both the base 20 and the sealing ring 22 are abutted against the outer edge of the positioning groove 28, the sealing ring 22 plays a role in sealing, the sealing ring 22 is provided with a tapered surface 23 abutted against the sealing cover 3, and due to the tapered surface 23, when the position of the sealing cover 3 is inclined, the tapered surface 23 can still be abutted against the outer edge of the positioning groove 28. It should be noted that, in this embodiment, the outer edge of the positioning groove 28 is an area between the through hole 31 and the positioning groove 28, and during assembly, the sealing ring 22 is pressed by the through hole, and due to the tapered surface 23, the sealing ring 22 can be kept pressed against the outer edges of the base 20, the through hole 31, and the positioning groove 28 under the action of the through hole 31, so that the sealing performance of the battery of this embodiment is further improved. Of course, those skilled in the art may arrange other structures on the outer edge of positioning slot 28, such as a groove. The seal ring 22 of this embodiment is made of a corrosion resistant material.

Wherein, the housing assembly 1 includes: base 24 and protection support 25, protection support 25 sets up in base 24 to with the structural dimension looks adaptation of base 24, protection support 25 is connected with closing cap 3, and forms with closing cap 3 and hold the chamber. The protection bracket 25 includes: bottom plate 26 and backup pad 27, backup pad 27 has two, two backup pads 27 support on bottom plate 26, and set up the both ends at bottom plate 26, with the position shown in fig. 1, the battery of this embodiment is assembled the back, the upper end of backup pad 27 and base 24's port parallel and level, look at with the overlooking direction in the position shown in fig. 1, the appearance profile of backup pad 27 is "concave" font, insert along backup pad 27 when installing electric core, traditional parcel multilayer adhesive tape has been saved, processes such as parcel mylar film and hot melt welding, conveniently install electric core subassembly 2 fast. The protection bracket 25 is further provided with a hollow hole to reduce the weight of the protection bracket 25. In this embodiment, the base 24 is an integral structure, and is manufactured by a stretching process without being assembled.

It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications of the invention are intended to be covered by the present invention.

Claims

1. An accumulator, comprising: the battery cell assembly comprises a shell assembly (1), a battery cell assembly (2) and a sealing cover (3), wherein the shell assembly (1) is connected with the sealing cover (3) and forms an accommodating cavity with the sealing cover (3); the battery pack (2) is arranged in the accommodating cavity, a one-way valve (5) is arranged on the sealing cover (3), the one-way valve (5) is in an opening state and a closing state, when the storage battery is filled with liquid, the one-way valve (5) is in the opening state, and when the storage battery is used, the one-way valve (5) is in the closing state.

2. The battery of claim 1, further comprising: and the sealing sheet (4) is arranged on the sealing cover (3) and is positioned on one side of the one-way valve (5), the sealing piece is separated from the sealing cover (3) when the storage battery is filled with liquid, and the sealing piece is connected with the sealing cover (3) when the storage battery is used.

3. Accumulator according to claim 2, characterized in that said one-way valve (5) comprises: an injection opening (6), a reset piece (7) and a closing piece (8), wherein the injection opening (6) is arranged on the sealing cover (3); the filling opening (6) and the closing part (8) are respectively connected with the resetting part (7), and when the one-way valve (5) is in a closed state, the closing part (8) is connected with the filling opening (6) to close the filling opening (6); when the one-way valve (5) is in an open state, the filling opening (6) is separated from the closing piece (8).

4. The accumulator according to claim 3, characterized in that the sealing plate (4) is located on one side of the closure (8), the sealing plate (4) being located opposite the pouring opening (6).

5. Accumulator according to claim 4, characterized in that said cover (3) comprises: the sealing plate comprises a cover plate (9) and an insulating plate (10), wherein the cover plate (9) is connected with the insulating plate (10), the insulating plate (10) is connected with the shell assembly (1), the sealing piece (4) is arranged on the cover plate (9), and the one-way valve (5) is arranged on the insulating plate (10).

6. Accumulator according to any one of claims 1 to 4, characterized in that said cover (3) comprises: the shell assembly comprises a cover plate (9) and an insulating plate (10), wherein the cover plate (9) is connected with the insulating plate (10), and the insulating plate (10) is connected with the shell assembly (1).

7. Accumulator according to claim 6, characterized in that said insulating plate (10) comprises: insulator (11) and buffer structure (12), insulator (11) includes: a first body (13) and a second body (14), the one-way valve (5) being provided on the first body (13) or the second body (14); the cushioning structure (12) is arranged between the first body (13) and the second body (14) and is deformed by the first body (13) and the second body (14).

8. Accumulator according to claim 7, characterized in that said buffer structure (12) comprises: one end of the arc-shaped strip is connected with the first body (13), the other end of the arc-shaped strip is connected with the second body (14), and the arc-shaped strips are arranged side by side.

9. The accumulator according to claim 6, characterized in that on the insulating plate (10) projections (15) are provided, said projections (15) being connected with the housing assembly (1) or the cell assembly (2) so that a set gap is formed between the insulating plate (10) and the cell assembly (2).

10. The accumulator according to claim 6, characterized in that said insulating plate (10) is connected to said casing assembly (1) by means of snap-in assemblies, two sets of said snap-in assemblies being arranged on opposite sides of said insulating plate (10).

11. Accumulator according to any one of claims 1 to 4, characterized in that said cell assembly (2) comprises: the battery cell structure comprises a battery cell (18) and a pole column (19), wherein the pole column (19) is connected with the battery cell (18), a positioning groove (28) is formed in the sealing cover (3), and the pole column (19) is embedded into the positioning groove (28).

12. The accumulator according to claim 11, characterized in that the pole (19) comprises a base (20) and a boss (21), the boss (21) is arranged on the base (20), the boss (21) is embedded in the positioning groove (28), and the base (20) is abutted against the outer edge of the positioning groove (28).

13. The accumulator according to claim 12, characterized by further comprising a sealing ring (22), wherein the sealing ring (22) is sleeved outside the base (20), the base (20) and the sealing ring (22) are both abutted against the outer edge of the positioning groove (28), and a tapered surface (23) abutted against the sealing cover (3) is arranged on the sealing ring (22).

14. Accumulator according to claim 1, characterized in that said casing assembly (1) comprises: base (24) and protective cradle (25), protective cradle (25) set up in base (24), protective cradle (25) with closing cap (3) are connected, and with closing cap (3) form and hold the chamber.