CN116487782B

CN116487782B - Lower plastic structure, energy storage device and electric equipment

Info

Publication number: CN116487782B
Application number: CN202310718949.4A
Authority: CN
Inventors: 李茂松
Original assignee: Shenzhen Haichen Energy Storage Control Technology Co ltd; Xiamen Hithium Energy Storage Technology Co Ltd
Current assignee: Shenzhen Haichen Energy Storage Technology Co ltd; Xiamen Hithium Energy Storage Technology Co Ltd
Priority date: 2023-06-16
Filing date: 2023-06-16
Publication date: 2024-01-26
Anticipated expiration: 2043-06-16
Also published as: CN116487782A

Abstract

The invention discloses a lower plastic structure, an energy storage device and electric equipment, wherein the lower plastic structure comprises a lower plastic part and a guide part, the lower plastic part is provided with a first liquid injection hole penetrating through a first surface and a second surface of the lower plastic part, the guide part is opposite to the first liquid injection hole, the guide part comprises a guide part and a connecting part, the guide part is connected with the first surface through the connecting part and comprises a first guide plate, a second guide plate and a connecting part connected between the first guide plate and the second guide plate, the first guide plate and the second guide plate are arranged at an angle, and the connecting part is arranged closer to the first surface than the first guide plate and the second guide plate, so that the first guide plate and the second guide plate are both used for guiding electrolyte injected through the first liquid injection hole. By adopting the technical scheme, the probability of damage to the bare cell caused by direct impact of the electrolyte on the bare cell can be reduced, meanwhile, the time for the electrolyte to infiltrate the bare cell can be effectively shortened, and the infiltration efficiency of the bare cell is improved.

Description

Lower plastic structure, energy storage device and electric equipment

Technical Field

The invention relates to the technical field of energy storage, in particular to a lower plastic structure, an energy storage device and electric equipment.

Background

The secondary battery (Rechargeable battery) is also called a rechargeable battery or a storage battery, and is a battery that can be continuously used by activating an active material by charging after discharging the battery. The recyclable characteristic of the secondary battery gradually becomes a main power source of electric equipment, as the demand of the secondary battery gradually increases, the performance requirements of people on all aspects of the secondary battery are also higher and higher, especially the requirement on the recycling performance of the secondary battery, and the quality of the liquid injection effect of the secondary battery is an important parameter for influencing the recycling performance of the battery.

The secondary battery in the related art generally comprises a top cover assembly, a bare cell and a shell, wherein the top cover assembly comprises a top cover plate, a lower plastic part and a plurality of parts, and through liquid injection holes are formed in the top cover plate and the lower plastic part, so that electrolyte can be injected into the shell through the liquid injection holes in the top cover plate and the lower plastic part to infiltrate the bare cell. However, electrolyte is easy to directly spray to the bare cell in the process of injecting the electrolyte, and certain injection pressure exists in the process of injecting the electrolyte, so that certain damage can be caused to the bare cell, meanwhile, as the injection hole is used for avoiding other structures (such as the installation position of a pole or the installation position of an explosion-proof valve, and the like), the center position of the bare cell is usually deviated, in the injection process, the electrolyte is easy to be concentrated and biased to one side of the bare cell, so that the electrolyte is firstly infiltrated at the position close to the injection hole by the bare cell, then is infiltrated at the position far away from the injection hole by the bare cell, the condition that the electrolyte is absorbed unevenly by the bare cell is easy to exist, the time for the electrolyte to infiltrate the bare cell is overlong, and the leaching efficiency of the bare cell is influenced.

Disclosure of Invention

The embodiment of the invention discloses a lower plastic structure, an energy storage device and electric equipment, which can reduce the probability of damaging a bare cell caused by direct impact of electrolyte on the bare cell, effectively shorten the time for the electrolyte to infiltrate the bare cell and improve the infiltration efficiency of the bare cell.

To achieve the above object, in a first aspect, the present invention discloses a lower plastic structure, which includes:

the lower plastic part is provided with a first surface and a second surface which are opposite to each other, and is provided with a first liquid injection hole which penetrates through the first surface and the second surface and is used for injecting electrolyte; and

the guide piece, the guide piece with first notes liquid hole sets up relatively, the guide piece includes guide part and adapting unit, guide part passes through adapting unit with first surface connection, just guide part include first guide plate and second guide plate with connect in first guide plate with connecting portion between the second guide plate, first guide plate with the second guide plate is angled to set up, connecting portion than first guide plate with the second guide plate is closer to first surface setting, so that first guide plate with the second guide plate all is used for the water conservancy diversion to flow through first notes liquid hole is poured into electrolyte.

In the lower plastic structure provided by the application, the guide piece is additionally arranged on the lower plastic piece, the guide part of the guide piece is designed to be a guide structure comprising the first guide plate and the second guide plate which are connected at an angle, and meanwhile, the connecting part between the first guide plate and the second guide plate is arranged closer to the first surface than the first guide plate and the second guide plate, so that electrolyte injected through the first liquid injection hole is guided to different positions of the bare cell by the first guide plate and the second guide plate, the area of the electrolyte infiltrating the bare cell can be increased, the electrolyte is prevented from being intensively injected towards one side of the bare cell, the problem that the bare cell absorbs the electrolyte unevenly is solved, the absorption efficiency of the bare cell on the electrolyte is improved, the infiltration time of the bare cell is shortened, and the infiltration efficiency of the bare cell is improved; meanwhile, due to the existence of the guide piece, the electrolyte injected through the first liquid injection hole can firstly contact the guide part of the guide piece and then fall onto the bare cell, so that the electrolyte can be prevented from directly impacting the bare cell, and the probability of damage to the bare cell caused by the direct impact of the electrolyte on the bare cell is reduced.

In an alternative embodiment, in an embodiment of the first aspect of the present invention, the connection portion is an elastic member, and the connection portion is disposed opposite to the first injection hole, so that the connection portion is elastically deformed and moves in a direction away from the first surface when receiving the impact force of the electrolyte, so as to adjust the angle between the first deflector and the second deflector.

Through designing the connecting part connected between the first guide plate and the second guide plate as an elastic piece, when electrolyte with larger flow is injected through the first injection hole, the electrolyte can have larger impact force on the connecting part, the larger impact force can cause the connecting part to generate relatively larger deformation, and meanwhile, the connecting part is also enabled to move relatively far away along the direction far away from the first surface, so that the angle between the first guide plate and the second guide plate is changed relatively larger, the first guide plate and the second guide plate are pulled to tend to be horizontally arranged, and at the moment, the included angle between the flow guiding direction of the electrolyte on the first guide plate and the second guide plate and the axial direction of the first injection hole is larger, so that the electrolyte flies relatively far away, and the electrolyte can fly to the position where the bare cell is far away from the first injection hole; when electrolyte with smaller flow is injected through the first liquid injection hole, the impact force of the electrolyte on the connecting part is smaller, the connecting part can generate relatively smaller deformation due to the smaller impact force, and meanwhile, the connecting part is also enabled to move relatively closer along the direction away from the first surface, so that the angle between the first guide plate and the second guide plate is changed relatively smaller, the included angle between the flow guide direction of the electrolyte on the first guide plate and the second guide plate and the axial direction of the first liquid injection hole is smaller, and the electrolyte flies relatively closer, so that the electrolyte can fly to the position where the bare cell is closer to the first liquid injection hole. That is, through designing the connecting portion of connecting between first guide plate and second guide plate as the elastic component, the impact force when the electrolyte is annotated in order to control to the liquid velocity of flow, indirect control is first guide plate and second guide plate between the angle size, the contained angle of the water conservancy diversion direction of electrolyte on first guide plate and second guide plate and the axis direction of first notes liquid hole promptly is indirectly controlled to further adjust the flight distance of electrolyte, be convenient for according to the demand of product, for example the size of naked electric core for the electrolyte can disperse water conservancy diversion and evenly drip each position to naked electric core, the infiltration of naked electric core is more even and quick for infiltration time.

As an alternative embodiment, in an embodiment of the first aspect of the present invention, the thickness of the connecting portion is smaller than the thickness of the baffle having the smallest thickness among the first baffle and the second baffle. Namely, the thickness of the connecting part is the smallest among the first guide plate, the second guide plate and the connecting part, and the connecting part is subjected to thinning treatment, so that the connecting part is easier to deform when being impacted by electrolyte.

As an alternative implementation manner, in the embodiment of the first aspect of the present invention, the connecting component is a telescopic rod, one end of the connecting component is hinged to the first surface, the other end of the connecting component is hinged to the first deflector or the second deflector, when the connecting part deforms and moves in a direction away from the first surface, the length of the connecting component changes, and the connecting component can rotate relative to the first deflector or the second deflector, so that when the connecting part is subjected to the impact force of the electrolyte and moves in a direction away from the first surface, the angle between the first deflector and the second deflector can be adjusted;

Or the connecting part is an elastic part, and when the connecting part deforms and moves in a direction away from the first surface, the connecting part is adaptively deformed, so that when the connecting part is elastically deformed due to the impact force of electrolyte, the possibility of adjusting the angle between the first guide plate and the second guide plate is provided. Through setting up connecting piece into elastomeric element, not only make connecting piece's structure simpler, can also make connecting piece and the connected mode of lower plastic part simultaneously to and connecting piece and first guide plate or second guide plate's connected mode are not limited to articulated, also can be bonding, joint etc. so that connecting piece and other parts (lower plastic part, first guide plate, second guide plate promptly) connected mode are diversified, flexible, be convenient for connecting piece and other parts's connection setting.

As an alternative implementation manner, in an embodiment of the first aspect of the present invention, the first baffle and/or the second baffle are provided with through holes. On the one hand, when the electrolyte is injected, the electrolyte can flow to the position of the bare cell, which is opposite to the first guide plate and/or the second guide plate, through the through hole, so that the electrolyte can flow to the position of the bare cell, which is opposite to the first guide plate and/or the second guide plate, so that the area of the bare cell, which is infiltrated by the electrolyte, is further enlarged, the electrolyte is prevented from being injected towards a certain position of the bare cell in a concentrated manner, the injection uniformity is improved, and the problem of nonuniform electrolyte absorption of the bare cell is solved; on the other hand, when the first guide plate and/or the second guide plate are deformed by different impact forces of electrolyte, the through holes can relieve and absorb acting forces generated by deformation, so that the first guide plate and/or the second guide plate are prevented from cracking, and the service life of the guide piece is prolonged.

As an alternative implementation manner, in an embodiment of the first aspect of the present invention, the connection portion has a center line, and the first baffle and the second baffle are located on two sides of the center line; the center of the first liquid injection hole is located outside the projection line of the center line on the first surface, the center of the first liquid injection hole is located between the projection line and the center of the lower plastic part, namely, the projection line does not pass through the center of the first liquid injection hole, and the center line of the connecting part is located at one side of the center of the first liquid injection hole away from the center of the lower plastic part, so that more electrolyte can be directly dropped onto a guide plate (namely, a first guide plate or a second guide plate) close to the center of the lower plastic part, and flows to the center of the bare cell along a path formed by the guide plate close to the center of the lower plastic part, and flows to one side of the bare cell away from the first liquid injection hole, so that more electrolyte flows to the center of the bare cell, and flows to one side of the bare cell away from the first liquid injection hole, and the overall liquid injection uniformity is improved.

In an optional implementation manner, in an embodiment of the first aspect of the present invention, a projection of the center line on the first surface is at least partially located in the first injection hole, so as to ensure that the electrolyte drops fall to strike the connection portion, so that a deformation degree of the connection portion can be controlled by adjusting an impact force during injection, and a distance of the connection portion moving along a direction away from the first surface is adjusted, so that an angle between the first guide plate and the second guide plate is adjusted, and an included angle between a guide direction of the electrolyte on the first guide plate and the second guide plate and an axial direction of the first injection hole is adjusted, so that a flight distance of the electrolyte is adjusted, so as to meet infiltration requirements of bare cells with different sizes.

As an alternative implementation manner, in an embodiment of the first aspect of the present invention, the connection portion has a center line, and the first baffle and the second baffle are located on two sides of the center line; the first flange and the second flange are respectively positioned on two sides of the first deflector in the direction parallel to the central line, and the third flange and the fourth flange are respectively positioned on two sides of the second deflector in the direction parallel to the central line.

Thus, the first flange, the second flange, the third flange and the fourth flange can be utilized to a certain extent to shield partial electrolyte from flowing along the direction parallel to the central line, so that most of electrolyte can flow towards the center of the bare cell to flow towards the center of the bare cell and flow towards one side of the bare cell far away from the first liquid injection hole, so that more electrolyte flows towards the center of the bare cell and flows towards one side of the bare cell far away from the first liquid injection hole, and overall liquid injection uniformity is improved.

In an embodiment of the first aspect of the present invention, the lower plastic part is square, the middle part of the first surface is convexly provided with an explosion-proof valve fence, the explosion-proof valve fence extends along a first direction, the middle part of the explosion-proof valve fence is provided with a groove, the groove penetrates through two sides of the explosion-proof valve fence along a second direction, the first deflector is closer to the groove than the second deflector, and in a third direction, the highest position of the first deflector from the first surface is higher than the bottom surface of the groove or is level with the bottom surface of the groove, wherein the first direction and the second direction are parallel to the first surface, the first direction and the second direction are perpendicular to each other, and the third direction is the direction that the first surface faces the deflector. The position of the first guide plate, which is the highest from the first surface, is higher than the bottom surface of the groove or is flush with the bottom surface of the groove, so that electrolyte can flow from the groove in the middle of the explosion-proof valve fence to the position of the plastic part, which is farther from the first liquid injection hole, through parallel flow, so that the electrolyte can flow to the position of the bare cell, which is the farther from the first liquid injection hole, and the electrolyte can be dispersed, guided and uniformly dropped onto each position of the bare cell, thereby facilitating more uniform and rapid infiltration of the bare cell;

In an optional implementation manner, in an embodiment of the first aspect of the present invention, the lower plastic part is circular, an arc-shaped supporting fence is protruding at an edge of the first surface, in the first flow guiding plate and the second flow guiding plate, the first flow guiding plate has a position that is the highest from the first surface in a third direction, and in the third direction, the position that is the highest from the first flow guiding plate is lower than a surface, facing away from the first surface, of the arc-shaped supporting fence, so that the flow guiding part and a tray body portion of the collecting tray can be arranged at intervals, and a gap is reserved to facilitate liquid running. Wherein the third direction is the direction of the first surface towards the flow guiding component.

In an optional implementation manner, in an embodiment of the first aspect of the present invention, a shortest distance between the connection portion and the first liquid injection hole along an axis direction of the first liquid injection hole is 1mm to 2.5mm. On the one hand, can avoid connecting portion to be too near to first notes liquid hole to avoid appearing the phenomenon of anti-bubbling, in order to guarantee to annotate the liquid normally, on the other hand, avoid connecting portion to annotate liquid Kong Taiyuan apart from first, in order to guarantee that most electrolyte can shunt, water conservancy diversion with the help of first guide plate and second guide plate, make the electrolyte can disperse the water conservancy diversion better to each position of naked electric core, so that naked electric core can more evenly and soak fast.

In an alternative embodiment, in an embodiment of the first aspect of the present invention, the plurality of connection members are respectively connected to the first surface, and a part of the connection members are connected to the first flow guiding plate, and another part of the connection members are connected to the second flow guiding plate. Therefore, at least two connecting positions are arranged between the flow guiding component and the lower plastic part, so that the connection stability between the flow guiding component and the lower plastic part is facilitated. And a part of connecting parts are connected with the first guide plate, and another part of connecting parts are connected with the second guide plate, so that the connecting stability is higher compared with the connecting parts and the first guide plate or the second guide plate.

As an alternative implementation manner, in an embodiment of the first aspect of the present invention, the connection portion has a center line, and the first baffle and the second baffle are located on two sides of the center line; the number of the connecting parts connected with the first guide plates is equal to the number of the connecting parts connected with the second guide plates, the connecting parts connected with the first guide plates and the connecting parts connected with the second guide plates are symmetrical about the central line, so that the whole stress of the guide parts is relatively uniform, and the guide parts cannot deviate when the electrolyte is injected, so that the electrolyte is prevented from being intensively guided to a certain position of a bare cell, and the whole electrolyte injection uniformity is ensured. Moreover, the heights of the two connecting members symmetrical about the center line in the axial direction of the first liquid injection hole are the same. If the heights of the first connecting part and the second connecting part which are symmetrical with each other are inconsistent in the axial direction of the first liquid injection hole, the distances between the first guide plate and the second guide plate and the first surface are inconsistent, so that electrolyte flows to a certain position of the bare cell along the guide plate which is closer to the first surface more easily, and the liquid injection uniformity is affected. The heights of the first connecting part and the second connecting part which are symmetrical to each other in the axial direction of the first liquid injection hole are kept consistent, so that electrolyte is prevented from flowing to a certain position of the bare cell along the guide plate which is closer to the first surface more easily, and the liquid injection uniformity is ensured.

In an optional implementation manner, in an embodiment of the first aspect of the present invention, a diversion surface is disposed on a side of the connection part facing the connection part, where the diversion surface is a diversion cambered surface or a diversion inclined surface, and the diversion surface is used for diversion of the electrolyte injected through the first injection hole. Therefore, the electrolyte can be secondarily split and guided by the guide surface, and the electrolyte injection efficiency is further improved.

In a second aspect, the invention discloses an energy storage device, which is provided with a shell, a bare cell and a top cover assembly, wherein the shell is provided with an opening, the bare cell is arranged in the shell, the top cover assembly comprises a top cover plate and the lower plastic structure according to the first aspect, the top cover plate is connected to the opening in a sealing manner, the lower plastic part of the lower plastic structure is connected to the top cover plate and is arranged towards the bare cell, the flow guide part is positioned on one side, away from the top cover plate, of the lower plastic part, and the top cover plate is provided with a second liquid injection hole communicated with the first liquid injection hole. Because the top cover assembly comprises the lower plastic structure of the first aspect, the energy storage device has the effective effects of the lower plastic structure of the first aspect, so that the energy storage device disclosed by the second aspect of the invention can also reduce the probability of damaging the bare cell caused by direct impact of electrolyte on the bare cell, and can effectively shorten the time of the electrolyte to infiltrate the bare cell and improve the infiltration efficiency of the bare cell.

In a third aspect, the invention discloses an electric device, which comprises an energy storage device according to the second aspect. The electric equipment with the energy storage device according to the second aspect has the beneficial effects of the lower plastic structure according to the first aspect, so that the electric equipment disclosed by the third aspect of the invention can also reduce the probability of damaging the bare cell caused by direct impact of electrolyte on the bare cell, and can effectively shorten the time for the electrolyte to infiltrate the bare cell and improve the infiltration efficiency of the bare cell.

Compared with the prior art, the invention has the beneficial effects that:

according to the lower plastic structure, the top cover assembly, the energy storage device and the electric equipment, the guide piece is additionally arranged on the lower plastic piece, the guide part of the guide piece is designed to be a guide structure comprising the first guide plate and the second guide plate which are connected at an angle, so that electrolyte injected through the first liquid injection hole is guided to different positions of the bare cell by the first guide plate and the second guide plate, the area of the bare cell infiltrated by the electrolyte can be enlarged, the electrolyte is prevented from being intensively injected towards one side of the bare cell, the problem that the bare cell absorbs the electrolyte unevenly is solved, the absorption efficiency of the bare cell on the electrolyte is improved, the infiltration time of the bare cell is shortened, and the infiltration efficiency of the bare cell is improved; meanwhile, due to the existence of the guide piece, the electrolyte injected through the first liquid injection hole can firstly contact the guide part of the guide piece and then fall onto the bare cell, so that the electrolyte can be prevented from directly impacting the bare cell, and the probability of damage to the bare cell caused by the direct impact of the electrolyte on the bare cell is reduced.

Further, when the connecting part connected between the first guide plate and the second guide plate is designed to be an elastic piece, when electrolyte with larger flow is injected through the first liquid injection hole, the impact force of the electrolyte on the connecting part is larger, the larger impact force can enable the connecting part to generate relatively larger deformation, the angle between the first guide plate and the second guide plate is changed relatively larger, the first guide plate and the second guide plate are pulled to be arranged towards the horizontal, at the moment, the included angle between the flow guiding direction of the electrolyte on the first guide plate and the second guide plate and the axial direction of the first liquid injection hole is larger, so that the electrolyte flies relatively farther, and the electrolyte can fly to a position of a bare cell farther from the first liquid injection hole; when electrolyte with smaller flow is injected through the first injection hole, the impact force of the electrolyte on the connecting part is smaller, the connecting part can generate relatively smaller deformation due to the smaller impact force, the angle between the first guide plate and the second guide plate is changed relatively smaller, the included angle between the flow guiding direction of the electrolyte on the first guide plate and the second guide plate and the axial direction of the first injection hole is smaller, and the electrolyte flies relatively closer, so that the electrolyte can fly to the position of the bare cell, which is closer to the first injection hole. That is, through designing the connecting portion of connecting between first guide plate and second guide plate as the elastic component, the impact force when the electrolyte is annotated in order to control to the liquid velocity of flow, indirect control is first guide plate and second guide plate between the angle size, the contained angle of the water conservancy diversion direction of electrolyte on first guide plate and second guide plate and the axis direction of first notes liquid hole promptly is indirectly controlled to further adjust the flight distance of electrolyte, be convenient for according to the demand of product, for example the size of naked electric core for the electrolyte can disperse water conservancy diversion and evenly drip each position to naked electric core, the infiltration of naked electric core is more even and quick for infiltration time.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic view of a lower plastic structure according to an embodiment of the present invention;

FIG. 2 is a schematic diagram showing an exploded structure of a lower plastic structure of the connecting portion according to the present invention when a larger impact force is applied to the connecting portion;

FIG. 3 is a schematic diagram showing an exploded structure of the lower plastic structure when the connecting portion is subjected to a smaller impact force according to the embodiment of the present invention;

FIG. 4 is a schematic perspective view of another view of the lower plastic structure according to the embodiment of the present invention;

FIG. 5 is a top view of a lower plastic structure with the center of the first injection hole on the center line of the connecting portion according to the embodiment of the present invention;

FIG. 6 is a partial enlarged view at E in FIG. 5;

FIG. 7 is a top view of a lower plastic structure with the center of the first injection hole outside the center line of the connecting portion according to an embodiment of the present invention;

Fig. 8 is a partial enlarged view at F in fig. 7;

FIG. 9 is a cross-sectional view of the lower plastic structure of FIG. 7 taken along the direction A-A;

FIG. 10 is a schematic perspective view of a lower plastic structure with a circular shape according to an embodiment of the present invention;

FIG. 11 is a top view of the lower plastic structure of FIG. 10;

FIG. 12 is a cross-sectional view of the lower plastic structure of FIG. 11 taken along the B-B direction;

FIG. 13 is a schematic view of a baffle according to an embodiment of the present invention;

fig. 14 is a schematic view showing an exploded structure of the top cap assembly according to the embodiment of the present invention;

fig. 15 is an exploded view of an energy storage device according to an embodiment of the present invention.

Description of the main reference numerals

10-lower plastic structure; 11-lower plastic parts; 11 A-A first surface; 11 b-a second surface; 111-a first liquid injection hole; 12-a flow guide; 121-a flow guiding component; 121 A-A first baffle; 121 b-a second baffle; 121 c-a connection; 1211-a through hole; 1212-a first flange; 1213-a second flange; 1214-a third flange; 1215-fourth flange; 122-connecting parts; 122 A-A first connecting member; 122 b-a second connecting member; 1221-a flow guiding surface; 13-explosion-proof valve fences; 131-grooves; 1311-groove bottom; 14-arc-shaped supporting fence;

m1-center line; m2-projection lines;

A 20-top cap assembly; 21-top cover plate; 211-a second liquid injection hole;

30-an energy storage device; 31-a housing; 311-opening; 32-bare cell.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

In the present invention, the terms "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal" and the like indicate an azimuth or a positional relationship based on that shown in the drawings. These terms are only used to better describe the present invention and its embodiments and are not intended to limit the scope of the indicated devices, elements or components to the particular orientations or to configure and operate in the particular orientations.

Also, some of the terms described above may be used to indicate other meanings in addition to orientation or positional relationships, for example, the term "upper" may also be used to indicate some sort of attachment or connection in some cases. The specific meaning of these terms in the present invention will be understood by those of ordinary skill in the art according to the specific circumstances.

Furthermore, the terms "mounted," "configured," "provided," "connected," and "connected" are to be construed broadly. For example, it may be a fixed connection, a removable connection, or a unitary construction; may be a mechanical connection, or an electrical connection; may be directly connected, or indirectly connected through intervening media, or may be in internal communication between two devices, elements, or components. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.

Furthermore, the terms "first," "second," and the like, are used primarily to distinguish between different devices, elements, or components (the particular species and configurations may be the same or different), and are not used to indicate or imply the relative importance and number of devices, elements, or components indicated. Unless otherwise indicated, the meaning of "a plurality" is two or more.

The technical scheme of the invention will be further described with reference to the examples and the accompanying drawings.

Referring to fig. 1 to 4, the embodiment of the invention discloses a lower plastic structure, wherein the lower plastic structure 10 comprises a lower plastic part 11 and a guiding part 12, the lower plastic part 11 has a first surface 11a and a second surface 11b opposite to each other, the lower plastic part 11 is provided with a first liquid injection hole 111 penetrating the first surface 11a and the second surface 11b, and the first liquid injection hole 111 is used for injecting electrolyte; the guide member 12 is disposed opposite to the first injection hole 111, the guide member 12 includes a guide member 121 and a connection member 122, the guide member 121 is connected to the first surface 11a through the connection member 122, and the guide member 121 includes a first guide plate 121a, a second guide plate 121b, and a connection portion 121c connected between the first guide plate 121a and the second guide plate 121b, the first guide plate 121a and the second guide plate 121b are disposed at an angle, and the connection portion 121c is closer to the first surface 11a than the first guide plate 121a and the second guide plate 121b, so that the first guide plate 121a and the second guide plate 121b can both be used for guiding the electrolyte injected through the first injection hole 111.

The guide piece 12 is additionally arranged on the lower plastic piece 11, the guide part 121 of the guide piece 12 is designed to be a guide structure comprising the first guide plate 121a and the second guide plate 121b which are connected at an angle, meanwhile, the connecting part 121c between the first guide plate 121a and the second guide plate 121b is arranged closer to the first surface 11a than the first guide plate 121a and the second guide plate 121b, so that the electrolyte injected through the first liquid injection hole 111 is guided to different positions of the bare cell by utilizing the first guide plate 121a and the second guide plate 121b, the area of the electrolyte infiltrating the bare cell can be increased, the electrolyte is prevented from being intensively injected towards one side of the bare cell, the problem that the bare cell absorbs the electrolyte unevenly is solved, the absorption efficiency of the bare cell is improved, the infiltration time of the bare cell is shortened, and the infiltration efficiency of the bare cell is improved; meanwhile, due to the existence of the guide piece 12, the electrolyte injected through the first liquid injection hole 111 can firstly contact the guide part 121 of the guide piece 12 and then fall onto the bare cell, so that the electrolyte can be prevented from directly impacting the bare cell, and the probability of damage to the bare cell caused by the direct impact of the electrolyte on the bare cell is reduced.

In some embodiments, the connecting portion 121c may be an elastic member, and the connecting portion 121c is disposed opposite to the first injecting hole 111 to ensure that the electrolyte injected through the first injecting hole 111 can strike the connecting portion 121c, so that the connecting portion 121c can be elastically deformed and move in a direction away from the first surface 11a when receiving the impact force of the electrolyte, so as to adjust the angle between the first deflector 121a and the second deflector 121 b. By designing the connecting portion 121c connected between the first deflector 121a and the second deflector 121b as an elastic member, when a large flow of electrolyte is injected through the first injection hole 111, the impact force of the electrolyte on the connecting portion 121c is large, the large impact force causes the connecting portion 121c to generate relatively large deformation, and meanwhile, the connecting portion 121c moves relatively far away from the first surface 11a, so that the angle between the first deflector 121a and the second deflector 121b changes relatively large (as shown in fig. 2), the first deflector 121a and the second deflector 121b are pulled to be in a horizontal arrangement, and at this time, the included angle between the direction of the electrolyte on the first deflector 121a and the direction of the axis of the first injection hole 111 is large, so that the electrolyte flies relatively far, and the electrolyte can fly to a position where the bare cell is far away from the first injection hole 111; when a smaller flow of electrolyte is injected through the first injection hole 111, the impact force of the electrolyte on the connecting portion 121c is smaller, the connecting portion 121c is deformed relatively less due to the smaller impact force, and meanwhile, the connecting portion 121c is also moved relatively closer along the direction away from the first surface 11a, so that the angle between the first guide plate 121a and the second guide plate 121b is changed relatively less (as shown in fig. 3), at this time, the included angle between the guide directions of the electrolyte on the first guide plate 121a and the second guide plate 121b and the axial direction of the first injection hole 111 is smaller, and the electrolyte flies relatively closer, so that the electrolyte can fly to the position where the bare cell is closer to the first injection hole 111. That is, by designing the connection portion 121c connected between the first deflector 121a and the second deflector 121b as an elastic member, the impact force during the injection can be controlled by controlling the flow rate and the flow rate of the electrolyte, so as to indirectly control the angle between the first deflector 121a and the second deflector 121b, that is, indirectly control the included angle between the flow direction of the electrolyte on the first deflector 121a and the second deflector 121b and the axial direction of the first injection hole 111, so as to further adjust the flying distance of the electrolyte, thereby being convenient for dispersing the flow and uniformly dripping the electrolyte to each position of the bare cell according to the product requirement, such as the size of the bare cell, facilitating the more uniform and rapid infiltration of the bare cell and accelerating the infiltration time.

Illustratively, the material of the connecting portion 121c may be, but is not limited to, rubber, silicone, foam, plastic, or other materials that have elastic deformation capability and are capable of recovering deformation.

In some embodiments, the thickness of the connection portion 121c is less than the thickness of the smallest of the first and second baffles 121a and 121 b. That is, the thickness of the connection portion 121c is minimized among the first deflector 121a, the second deflector 121b, and the connection portion 121c is thinned, so that the connection portion 121c is more likely to be deformed when being impacted by the electrolyte.

In order to enable the angular size between the first and second guide plates 121a and 121b to be changed when the connection part 121c is elastically deformed by the impact of the electrolyte and moves in a direction away from the first surface 11a, as an alternative embodiment, the connection part 122 is a telescopic rod, and one end of the connection part 122 is hinged to the first surface 11a, and the other end of the connection part 122 is hinged to the first or second guide plate 121a or 121b, so that the length of the connection part 122 is changed when the connection part 121c is deformed and moves in a direction away from the first surface 11a, and the connection part 122 can be rotated relative to the first or second guide plate 121a or 121b, thereby enabling the angular size between the first and second guide plates 121a and 121b to be adjusted when the connection part 121c is elastically deformed by the impact of the electrolyte and moves in a direction away from the first surface 11 a.

As another alternative embodiment, the connection member 122 may be an elastic member to be deformed adaptively when the connection portion 121c is deformed and moved in a direction away from the first surface 11a, that is, the connection member 122 is deformed adaptively when the connection portion 121c is deformed and moved in a direction away from the first surface 11a, so that it is possible to adjust the angle between the first and second guide plates 121a and 121b when the connection portion 121c is elastically deformed by an impact force of the electrolyte and moved in a direction away from the first surface 11 a. By arranging the connecting component 122 as an elastic component, the structure of the connecting component 122 is relatively simple, meanwhile, the connecting mode of the connecting component 122 and the lower plastic component 11 and the connecting mode of the connecting component 122 and the first guide plate 121a or the second guide plate 121b are not limited to hinging, and can also be bonding, clamping and the like, so that the connecting mode of the connecting component 122 and other components (namely the lower plastic component 11, the first guide plate 121a and the second guide plate 121 b) is relatively diversified and flexible, and the connecting arrangement of the connecting component 122 and other components is facilitated.

In this embodiment, the material of the connecting member 122 may be, but not limited to, rubber, silica gel, foam, plastic, or other materials with elastic deformation capability and capable of recovering deformation.

It will be appreciated, of course, that in addition to the two alternative embodiments described above, in other embodiments, the connecting member 122 may be an elastic member, and one end of the connecting member 122 is hinged to the first surface 11a, and the other end of the connecting member 122 is hinged to the first deflector 121a or the second deflector 121b, so that when the connecting portion 121c is deformed and moves in a direction away from the first surface 11a, the connecting member 122 is deformed adaptively, and the connecting member 122 may rotate relative to the first deflector 121a or the second deflector 121 b.

In some embodiments, as shown in fig. 4, the first baffle 121a and/or the second baffle 121b are provided with at least one through hole 1211, that is, at least one through hole 1211 may be provided in only the first baffle 121a, or at least one through hole 1211 may be provided in only the second baffle 121b, or at least one through hole 1211 may be provided in both the first baffle 121a and the second baffle 121b, and the through hole 1211 is in communication with the first injection hole 111. On the one hand, when the electrolyte is injected, the electrolyte can flow to the position of the bare cell opposite to the first guide plate 121a and/or the second guide plate 121b through the through hole 1211, so that the electrolyte can flow to the position of the bare cell opposite to the first guide plate 121a and/or the second guide plate 121b, the area of the electrolyte infiltrating the bare cell is further enlarged, the electrolyte is prevented from being injected towards a certain position of the bare cell in a concentrated manner, the electrolyte injection uniformity is improved, and the problem of nonuniform electrolyte absorption of the bare cell is solved; on the other hand, when the first deflector 121a and/or the second deflector 121b are deformed by different impact forces of the electrolyte, the through holes 1211 can relieve and absorb the acting force generated by deformation, so as to avoid the cracking of the first deflector 121a and/or the second deflector 121b, and improve the service life of the deflector 12.

Preferably, as shown in fig. 2 to 4, each of the first and second baffles 121a and 121b is provided with a plurality of through holes 1211, for example, two through holes 1211, three through holes 1211, four through holes 1211, five through holes 1211, six through holes 1211, or more through holes 1211. The plurality of through holes 1211 are formed in the first deflector 121a and the second deflector 121b, so that relatively more electrolyte can flow to the position where the bare cell is opposite to the first deflector 121a and/or the second deflector 121b through the through holes 1211, thereby ensuring the liquid injection uniformity, ensuring that the first deflector 121a and the second deflector 121b have relatively stronger structural strength, avoiding the breakage of the first deflector 121a and/or the second deflector 121b, and prolonging the service life of the deflector 12 compared with the mode that the first deflector 121a and the second deflector 121b are directly provided with the through holes 1211 with larger apertures.

In some embodiments, as shown in fig. 5 and 6, the first injection hole 111 is generally located at one side of the lower plastic part 11, that is, the center O1 of the first injection hole 111 and the center O2 of the lower plastic part 11 are generally disposed eccentrically (the center O1 of the first injection hole 111 and the center O2 of the lower plastic part 11 are not coaxial (or are not concentric) so as to avoid other structures, for example, when the lower plastic structure 10 is applied to the top cover assembly of a cylindrical battery, since the mounting position of the pole is generally disposed at the geometric center of the top cover plate and the lower plastic part 11, the first injection hole 111 is generally located at either side of the mounting position of the pole so as to avoid the mounting position of the pole; when the lower plastic structure 10 is applied to the top cap assembly of the square battery, the first injection hole 111 is generally located at either side of the installation position of the explosion-proof valve to avoid the installation position of the explosion-proof valve, since the installation position of the explosion-proof valve is generally located at the geometric center of the top cap plate and the lower plastic member 11.

In some embodiments, the connecting portion 121c has a center line M1, wherein the first and second baffles 121a and 121b are located on both sides of the center line M1; the center of the first pouring orifice 111 may be located on the projection line M2 of the center line M1 on the first surface 11a (as shown in fig. 5 and 6), or may be located outside the projection line M2 of the center line M1 on the first surface 11a (as shown in fig. 7 and 8). It can be understood that when the center O1 of the first liquid injection hole 111 is located on the projection line M2 of the center line M1 on the first surface 11a, it is ensured that the electrolyte drops fall down to be able to strike the connection portion 121c, so that the electrolyte dropped to the center line M1 of the connection portion 121c can flow along the path formed by the first deflector 121a and the second deflector 121b from the position of the connection portion 121c, and can flow to the respective positions substantially uniformly along the first deflector 121a and the second deflector 121 b; however, since the center O1 of the first injection hole 111 and the center O2 of the lower plastic part 11 are usually disposed eccentrically, in order to achieve uniform injection, more electrolyte needs to flow to the center of the bare cell and one side of the bare cell away from the center O2 of the lower plastic part 11, preferably, as shown in fig. 7 and 8, the center O1 of the first injection hole 111 is located outside the projection line M2 of the center line M1 on the first surface 11a, i.e., the projection line M2 of the center line M1 on the first surface 11a does not pass through the center O1 of the first injection hole 111, and the center of the first injection hole 111 is located between the projection line M2 of the center line M1 on the first surface 11a and the center of the lower plastic part 11, i.e., the center line M1 of the connecting portion 121c is located on one side of the center O2 of the first injection hole 111 away from the center O2 of the lower plastic part 11, so that more electrolyte can be directly dropped onto the guide plate (i.e., the first guide plate 121a or the second guide plate 121 b) near the center O2 of the lower plastic part 11 and flow to one side of the center O2 of the die away from the center of the die, thereby forming a uniform injection path.

It can be understood that, by setting the center O1 of the first injection hole 111 outside the projection line M2 of the center line M1 on the first surface 11a, the center line M1 of the connecting portion 121c is located at a side of the center O1 of the first injection hole 111 away from the center O2 of the lower plastic member 11, when injecting liquid, the electrolyte injected from the first injection hole 111 may not strike the connecting portion 121c, resulting in poor deformation effect of the connecting portion 121c, so that the control effect of the electrolyte flying distance is poor, and the center line M1 of the connecting portion 121c is located at a side of the center O1 of the first injection hole 111 away from the center O2 of the lower plastic member 11, so that the electrolyte injected from the first injection hole 111 directly drops to the guide plate close to the center of the lower plastic member 11 and flows to the center of the die along the guide direction close to the center of the lower plastic member 11, which may result in poor uniformity of the electrolyte flowing to the center of the die and flowing to the side of the die away from the first injection hole 111, which is easy to wet the die, and the time of the die is poor. Therefore, in some embodiments, the projection line M2 of the center line M1 of the connecting portion 121c on the first surface 11a is at least partially located in the first injecting hole 111, so as to ensure that the electrolyte drops fall down to strike the connecting portion 121c, so that the deformation degree of the connecting portion 121c can be controlled by adjusting the impact force during injecting, and the distance of the connecting portion 121c moving away from the first surface 11a can be adjusted, so as to adjust the angle between the first guide plate 121a and the second guide plate 121b, thereby adjusting the included angle between the guide direction of the electrolyte on the first guide plate 121a and the second guide plate 121b and the axial direction of the first injecting hole 111, and further adjusting the flying distance of the electrolyte, so as to meet the infiltration requirements of bare cells with different sizes.

As an alternative embodiment, as shown in fig. 7 to 9, the lower plastic member 11 has a square shape, for example, a square shape or a rectangular shape, and the middle portion of the first surface 11a is convexly provided with the explosion-proof valve fence 13, the explosion-proof valve fence 13 is extended in the first direction, the middle portion of the explosion-proof valve fence 13 is provided with the groove 131, and the groove 131 penetrates through both sides of the explosion-proof valve fence 13 in the second direction. The first deflector 121a is closer to the groove 131 than the second deflector 121b, and in the third direction, the highest position of the first deflector 121a from the first surface 11a is higher than the groove bottom surface 1311 of the groove 131, or is flush with the groove bottom surface 1311 of the groove 131, that is, the distance h1 from the highest position of the first deflector 121a from the first surface 11a to the first surface 11a is greater than or equal to the distance h2 from the groove bottom surface 1311 to the first surface 11a, so as to ensure that electrolyte can flow from the groove 131 in the middle of the explosion-proof valve fence 13 to the position of the plastic part 11 farther from the first injection hole 111 through parallel flow, so that the electrolyte can flow to the position of the bare cell farther from the first injection hole 111, and therefore the electrolyte can be dispersed and evenly dropped to each position of the bare cell, and the bare cell can be more evenly and quickly infiltrated.

The first direction and the second direction are parallel to the first surface 11a, and the first direction and the second direction are perpendicular to each other, for example, the first direction may be a front-to-back direction in fig. 7 and 9, the second direction may be a left-to-right direction in fig. 7, the third direction is a direction in which the first surface 11a faces the flow guiding member 121, for example, the third direction may be an up-and-down direction in fig. 9.

As another alternative embodiment, as shown in fig. 10 to 12, the shape of the lower plastic part 11 is circular, and the edge of the first surface 11a is convexly provided with an arc-shaped supporting fence 14, the first deflector 121a is closer to the arc-shaped supporting fence 14 than the second deflector 121b, and in the third direction, the highest position of the first deflector 121a from the first surface 11a is lower than a surface of the arc-shaped supporting fence 14 facing away from the first surface 11a, i.e., the distance h1 from the highest position of the first deflector 121a from the first surface 11a to the first surface 11a is smaller than the protruding height h3 of the arc-shaped supporting fence 14 relative to the first surface 11a, so that the deflector 12 can be spaced from the disk body of the collecting disk, and a reserved gap is convenient for liquid to flow.

It is found that if the connection portion 121c is closer to the first liquid injection hole 111, the path space is narrower when the electrolyte drops from the first liquid injection hole 111, so that the phenomenon of reverse bubbling of the electrolyte is easy to occur; since a portion of the electrolyte is adhered to the first surface 11a of the lower plastic part 11 and flows from the first surface 11a due to the surface tension, if the connecting portion 121c is far from the first liquid injection hole 111, the path space is wider when the electrolyte drops from the first liquid injection hole 111, and most of the electrolyte is adhered to the first surface 11a of the lower plastic part 11 and flows from the first surface 11a, so that most of the electrolyte cannot be guided and split by means of the first guide plate 121a and the second guide plate 121b, and the guiding and splitting effects of the guide part 12 on the electrolyte are lower, which is not beneficial to more uniform and rapid infiltration of the bare cell. So in some embodiments, the shortest distance h4 between the connection portion 121c and the first injection hole 111 in the axial direction of the first injection hole 111, for example, in the vertical direction in fig. 9 and 12, is 1mm to 2.5mm, for example, 1mm, 1.2mm, 1.3mm, 1.5mm, 1.6mm, 1.8mm, 2mm, 2.2mm, 2.3mm, 2.4mm, or 2.5mm, etc., so that on one hand, the connection portion 121c is prevented from being too close to the first injection hole 111, thereby avoiding the phenomenon of anti-bubbling, so as to ensure that normal injection can be performed, and on the other hand, the connection portion 121c is prevented from being too far from the first injection hole 111, so as to ensure that most of the electrolyte can be split and guided by the first guide plate 121a and the second guide plate 121b, so that the electrolyte can be better dispersed and guided to the respective positions of the bare cell, so that the bare cell can be more uniformly and quickly infiltrated.

In some embodiments, as shown in connection with fig. 10 to 13, a surface of the first deflector 121a facing the first surface 11a is convexly provided with a first flange 1212 and a second flange 1213, the first flange 1212 and the second flange 1213 are respectively located at both sides of the first deflector 121a in a direction parallel to the center line M1 of the connection portion 121c (e.g., front-rear direction in fig. 13), a surface of the second deflector 121b facing the first surface 11a is convexly provided with a third flange 1214 and a fourth flange 1215, and the third flange 1214 and the fourth flange 1215 are respectively located at both sides of the second deflector 121b in a direction parallel to the center line M1 of the connection portion 121 c. This can prevent part of the electrolyte from flowing in a direction parallel to the center line M1 of the connection portion 121c by using the first flange 1212, the second flange 1213, the third flange 1214, and the fourth flange 1215 to a certain extent, so as to ensure that most of the electrolyte can flow toward the center of the bare cell and toward the side of the bare cell away from the first injection hole 111, thereby allowing more electrolyte to flow toward the center of the bare cell and toward the side of the bare cell away from the first injection hole 111, and improving the overall injection uniformity.

In some embodiments, the connecting members 122 are a plurality, for example, two, three, four, five, six or more, and the plurality of connecting members 122 are respectively connected to the first surface 11a, and a part of the connecting members 122 are connected to the first deflector 121a and another part of the connecting members 122 are connected to the second deflector 121 b. In this way, there are at least two connection positions between the guide member 121 and the lower plastic member 11, thereby facilitating connection stability between the guide member 121 and the lower plastic member 11. And a part of the connecting members 122 are connected with the first deflector 121a, and another part of the connecting members 122 are connected with the second deflector 121b, the connection stability is higher than that of all the connecting members 122 with the first deflector 121a or the second deflector 121 b.

Further, for convenience of description, as shown in fig. 13, the connection part 122 connected to the first deflector 121a is defined as a first connection part 122a, and the connection part 122 connected to the second deflector 121b is defined as a second connection part 122b, which is only for convenience of description, but should not limit the scope of protection of the present application. The number of the first connecting parts 122a is equal to that of the second connecting parts 122b, and the first connecting parts 122a and the second connecting parts 122b are symmetrical about the central line M1, so that the overall stress of the flow guiding parts 121 is relatively uniform, and the flow guiding parts 121 are not biased during liquid injection, so that the electrolyte is prevented from being intensively guided to a certain position of the bare cell, and the overall liquid injection uniformity is ensured. Moreover, the first connecting member 122a and the second connecting member 122b that are symmetrical to each other have the same height in the axial direction of the first injection hole 111, and if the heights of the first connecting member 122a and the second connecting member 122b that are symmetrical to each other in the axial direction of the first injection hole 111 are not uniform, the distances of the first deflector 121a and the second deflector 121b from the first surface 11a are not uniform, so that the electrolyte flows to a certain position of the bare cell along the deflector closer to the first surface 11a more easily, and the injection uniformity is affected. By keeping the heights of the first connecting member 122a and the second connecting member 122b symmetrical to each other in the axial direction of the first injection hole 111 uniform, it is avoided that the electrolyte flows to a certain position of the bare cell along the deflector closer to the first surface 11a more easily, and the injection uniformity is ensured.

Preferably, the number of the connecting members 122 is four, two connecting members 122 form a first connecting member 122a, and are connected to the first deflector 121a, and the other two connecting members 122 form a second connecting member 122b, and are connected to the second deflector 121b, and since the connecting members 122 are equivalent to barrier members, too many connecting members 122 affect the filling efficiency of the electrolyte, and too few connecting members 122 affect the connection stability of the deflector 121. The four connection members 122 are provided to ensure the connection stability of the guide member 121 while ensuring the injection efficiency of the electrolyte.

In some embodiments, a diversion surface 1221 is disposed on a side of the connection part 122 facing the connection part 121c, where the diversion surface 1221 is a diversion cambered surface or a diversion inclined surface, and the diversion surface 1221 can be used for diversion of the electrolyte injected through the first injection hole 111. So that the electrolyte can be secondarily split and guided by the guide surface 1221, thereby being beneficial to further improving the injection efficiency of the electrolyte.

For example, the connecting member 122 may have a bar-shaped structure or a cylindrical structure, for example, the outer circumferential side of the connecting member 122 may have an arc surface, and the outer circumferential side of the connecting member 122 may form the flow guiding arc surface, so that the connecting member 122 does not need to be cut, and the structure of the connecting member 122 is relatively simple.

As an alternative embodiment, the connecting part 122 is integrally formed with the lower plastic part 11, for example, the connecting part 122 and the lower plastic part 11 can be integrally formed by injection molding, so that the processing time can be shortened, the installation process can be simplified, and the installation efficiency can be improved; and because the connecting part 122 and the lower plastic part 11 are generally in fusion connection in the injection molding process, the connection reliability and stability between the connecting part 122 and the lower plastic part 11 are higher.

As another alternative embodiment, the connecting component 122 is connected with the lower plastic component 11 by hot melting, so that the installation mode is simpler, and compared with the traditional mechanical fastening (riveting, screwing and other modes), the hot melting connection makes the connection between the connecting component 122 and the lower plastic component 11 possible to be fused and connected together, so that the connection strength is higher, and the overall quality of the installed lower plastic structure 10 is lighter, thereby being beneficial to the lightweight design of the lower plastic structure 10.

As yet another alternative embodiment, the connecting component 122 is detachably connected to the lower plastic part 11, for example, the connecting component 122 and the lower plastic part 11 may be in snap connection, so that the connecting component 122 may be detached from the lower plastic part 11, so that the air guide 12 is detached from the lower plastic part 11, so that when the elasticity of the connecting portion 121c fails, the air guide 12 can be detached to replace the new air guide 12, instead of replacing the whole lower plastic structure 10, thereby being beneficial to reducing the replacement cost.

Referring to fig. 14, in a second aspect of the present invention, a top cover assembly 20 is disclosed, the top cover assembly 20 includes a top cover plate 21 and a lower plastic structure 10 as described above, the lower plastic part 11 of the lower plastic structure 10 is connected to the top cover plate 21, the flow guiding part 12 is located on a side of the lower plastic part 11 facing away from the top cover plate 21, and the top cover plate 21 is provided with a second liquid injection hole 211 in communication with the first liquid injection hole 111, so that during liquid injection, an electrolyte can be injected through the second liquid injection hole 211 and the first liquid injection hole 111 in sequence to infiltrate a bare cell. It will be appreciated that the top cover assembly 20 having the lower plastic structure 10 described above can provide the same or similar advantages, and specific reference will be made to the description of the embodiment of the lower plastic structure 10, which will not be repeated herein.

Referring to fig. 15, a third aspect of the present invention discloses an energy storage device, wherein the energy storage device 30 has a housing 31, a bare cell 32, and the top cover assembly 20 as described above, the housing 31 has an opening 311, the bare cell 32 is disposed in the housing 31, the top cover 21 is hermetically connected to the opening 311, and the lower plastic structure 10 is disposed towards the bare cell 32. It will be appreciated that the energy storage device 30 having the top cover assembly 20 described above can also provide the same or similar advantages, and the description of the embodiment of the plastic structure 10 will be omitted herein.

The energy storage device 30 may include, but is not limited to, a single battery, a battery module, a battery pack, a battery system, and the like. When the energy storage device 30 is a single battery, it may be a square battery or a round battery.

In a fourth aspect, the invention discloses an electrical consumer comprising an energy storage device as described above. The technical scheme of the embodiment of the application is applicable to various electric equipment using the energy storage device, such as a battery car, an electric toy, an electric tool, an electric vehicle, a ship, a spacecraft, a mobile phone, portable equipment, a palm computer or a notebook computer and the like.

The lower plastic structure, the top cover assembly, the energy storage device and the electric equipment disclosed by the embodiment of the invention are described in detail, specific examples are applied to the principle and the implementation of the invention, and the description of the above embodiment is only used for helping to understand the lower plastic structure, the top cover assembly, the energy storage device and the electric equipment and the core ideas thereof; meanwhile, as those skilled in the art will vary in the specific embodiments and application scope according to the idea of the present invention, the present disclosure should not be construed as limiting the present invention in summary.

Claims

1. A lower plastic structure (10), characterized in that the lower plastic structure (10) comprises:

the lower plastic part (11), the lower plastic part (11) is provided with a first surface (11 a) and a second surface (11 b) which are opposite, the lower plastic part (11) is provided with a first liquid injection hole (111) penetrating through the first surface (11 a) and the second surface (11 b), and the first liquid injection hole (111) is used for injecting electrolyte; and

the fluid guiding piece (12), the fluid guiding piece (12) is arranged opposite to the first fluid injecting hole (111), the fluid guiding piece (12) comprises a fluid guiding component (121) and a connecting component (122), the fluid guiding component (121) is connected with the first surface (11 a) through the connecting component (122), the fluid guiding component (121) comprises a first fluid guiding plate (121 a), a second fluid guiding plate (121 b) and a connecting part (121 c) connected between the first fluid guiding plate (121 a) and the second fluid guiding plate (121 b), the first fluid guiding plate (121 a) and the second fluid guiding plate (121 b) are arranged at an angle, the first fluid guiding plate (121 a) and/or the second fluid guiding plate (121 b) are provided with through holes (1211), the connecting part (121 c) is arranged closer to the first surface (11 a) than the first fluid guiding plate (121 a) and the second fluid guiding plate (121 b), the connecting part (121 c) is arranged along the first fluid guiding plate (121 a) and the second fluid guiding plate (121 b) is deformed along the first fluid guiding plate (121 b) and the first fluid guiding plate (121 b) along the first fluid guiding plate (121 b);

The connecting component (122) is a telescopic rod, one end of the connecting component (122) is hinged with the first surface (11 a), the other end of the connecting component (122) is hinged with the first guide plate (121 a) or the second guide plate (121 b), when the connecting part (121 c) deforms and moves in a direction away from the first surface (11 a), the length of the connecting component (122) changes, and the connecting component (122) can rotate relative to the first guide plate (121 a) or the second guide plate (121 b); or alternatively

The connecting member (122) is an elastic member so that the connecting member (122) is adapted to deform when the connecting portion (121 c) deforms and moves in a direction away from the first surface (11 a).

2. The lower plastic structure according to claim 1, wherein the thickness of the connecting portion (121 c) is smaller than the thickness of the smallest of the first and second baffles (121 a, 121 b).

3. The lower plastic structure according to claim 1, wherein the connecting portion (121 c) has a center line (M1), and the first deflector (121 a) and the second deflector (121 b) are located at two sides of the center line (M1);

The center of the first liquid injection hole (111) is located outside a projection line (M2) of the center line (M1) on the first surface (11 a), and the center of the first liquid injection hole (111) is located between the projection line (M2) and the center of the lower plastic part (11);

the projection line (M2) of the center line (M1) on the first surface (11 a) is at least partially located in the first liquid injection hole (111).

4. The lower plastic structure according to claim 1, wherein the connecting portion (121 c) has a center line (M1), and the first deflector (121 a) and the second deflector (121 b) are located at two sides of the center line (M1);

a surface of the first deflector (121 a) facing the first surface (11 a) is convexly provided with a first flange (1212) and a second flange (1213), the first flange (1212) and the second flange (1213) are respectively positioned at two sides of the first deflector (121 a) in a direction parallel to the central line (M1), a surface of the second deflector (121 b) facing the first surface (11 a) is convexly provided with a third flange (1214) and a fourth flange (1215), and the third flange (1214) and the fourth flange (1215) are respectively positioned at two sides of the second deflector (121 b) in the direction parallel to the central line (M1).

5. The lower plastic structure according to claim 1, characterized in that the shape of the lower plastic part (11) is square, and the middle part of the first surface (11 a) is convexly provided with an explosion-proof valve fence (13), the explosion-proof valve fence (13) is arranged to extend along a first direction, the middle part of the explosion-proof valve fence (13) is provided with a groove (131), the groove (131) penetrates through two sides of the explosion-proof valve fence (13) along a second direction, the first guide plate (121 a) is closer to the groove (131) relative to the second guide plate (121 b), and in a third direction, the position of the first guide plate (121 a) which is the highest from the first surface (11 a) is higher than the groove bottom surface (1311) of the groove (131), or is parallel to the groove bottom surface (1311) of the groove (131), and the first direction and the second direction are parallel to the first surface (11 a), and the first direction and the second direction are parallel to each other, and the third direction is the guide part (121 a) is perpendicular to the first direction.

6. The lower plastic structure according to claim 1, characterized in that the shape of the lower plastic part (11) is circular, and an arc-shaped supporting fence (14) is protruding at the edge of the first surface (11 a), the first deflector (121 a) has a position highest from the first surface (11 a) in a third direction among the first deflector (121 a) and the second deflector (121 b), and the highest position of the first deflector (121 a) from the first surface (11 a) is lower than a surface of the arc-shaped supporting fence (14) facing away from the first surface (11 a), wherein the third direction is a direction in which the first surface (11 a) faces the deflector member (121).

7. The lower plastic structure according to claim 1, wherein a shortest distance between the connecting portion (121 c) and the first liquid injection hole (111) along an axial direction of the first liquid injection hole (111) is 1mm to 2.5mm.

8. The lower plastic structure according to claim 1, wherein the plurality of connecting members (122) are provided, the plurality of connecting members (122) are respectively connected to the first surface (11 a), a part of the connecting members (122) are connected to the first deflector (121 a), and another part of the connecting members (122) are connected to the second deflector (121 b).

9. The lower plastic structure according to claim 8, wherein the connecting portion (121 c) has a center line (M1), and the first deflector (121 a) and the second deflector (121 b) are located at two sides of the center line (M1);

the number of the connecting parts (122) connected with the first deflector (121 a) is equal to the number of the connecting parts (122) connected with the second deflector (121 b), the connecting parts (122) connected with the first deflector (121 a), the connecting parts (122) connected with the second deflector (121 b) are symmetrical about the center line (M1), and the heights of the two connecting parts (122) symmetrical about the center line (M1) in the axial direction of the first liquid injection hole (111) are the same.

10. The lower plastic structure according to any one of claims 1 to 9, wherein a diversion surface (1221) is disposed on a side of the connection part (122) facing the connection part (121 c), the diversion surface (1221) is a diversion cambered surface or a diversion inclined surface, and the diversion surface (1221) is used for diversion of the electrolyte injected through the first injection hole (111).

11. An energy storage device, characterized in that the energy storage device (30) comprises:

a housing (31), the housing (31) having an opening (311);

a bare cell (32), wherein the bare cell (32) is arranged in the shell (31); and

top cap subassembly (20), top cap subassembly (20) include lamina tecti (21) and lower plastic structure (10) according to any one of claims 1-10, lamina tecti (21) sealing connection in opening (311), lower plastic part (11) of lower plastic structure (10) connect in lamina tecti (21) and towards naked electric core (32) set up, water conservancy diversion spare (12) are located the one side of leaving of lamina tecti (21) of lower plastic part (11), lamina tecti (21) be equipped with second notes liquid hole (211) of first notes liquid hole (111) intercommunication.

12. A powered device, characterized in that the powered device comprises an energy storage device (30) as claimed in claim 11.