CN115882129A - Energy storage device and electric equipment - Google Patents
Energy storage device and electric equipment Download PDFInfo
- Publication number
- CN115882129A CN115882129A CN202211642354.7A CN202211642354A CN115882129A CN 115882129 A CN115882129 A CN 115882129A CN 202211642354 A CN202211642354 A CN 202211642354A CN 115882129 A CN115882129 A CN 115882129A
- Authority
- CN
- China
- Prior art keywords
- electrode assembly
- energy storage
- storage device
- hole
- connection portion
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Abstract
The application discloses energy memory and consumer relates to battery technical field. This energy storage device includes: the shell is provided with an opening and is provided with an accommodating cavity; an electrode assembly accommodated in the accommodating cavity; a cover plate sealing the opening of the case; the current collecting piece is positioned between the electrode assembly and the cover plate and is provided with a first connecting part which is back to the battery cell and is connected with the cover plate and a plurality of second connecting parts which face the electrode assembly and are connected with the electrode assembly; the second connecting parts are located on the periphery of the first connecting part and distributed at intervals along the circumferential direction of the current collecting piece, the second connecting parts are connected with the first connecting parts through fusing parts, and first through holes are formed between two adjacent fusing parts in the circumferential direction of the current collecting piece. In this application embodiment, the setting of first through-hole for the fusing part is less at the radial ascending area of mass flow piece, thereby when taking place thermal runaway, fusing part can be fused to the electric current of instantaneous increase, thereby guarantees the security when energy memory uses, has reduced the potential safety hazard.
Description
Technical Field
The application relates to the technical field of batteries, in particular to an energy storage device and electric equipment.
Background
With the gradual shortage of resources and the aggravation of environmental pollution, secondary batteries are increasingly widely used. The battery generally includes a case, an electrode assembly, a cap plate, and a current collecting plate connected to the electrode assembly and the cap plate, respectively, to form a current flow path from the electrode assembly to the cap plate.
In the use process of the secondary battery, it is found that the current of the secondary battery is increased instantly when the secondary battery is in thermal runaway (internal short circuit), and further the secondary battery is easy to explode, so that certain potential safety hazards exist, and therefore, improvement on the internal structure of the secondary battery is needed to reduce the potential safety hazards of the battery when the secondary battery is used.
Disclosure of Invention
One of the main objects of the present application is to provide an energy storage device and an electric device capable of reducing the potential safety hazard.
In order to achieve the purpose of the application, the following technical scheme is adopted in the application:
according to an aspect of the present application, there is provided an energy storage device including:
the shell is provided with an opening and an accommodating cavity;
the electrode assembly is accommodated in the accommodating cavity;
a cover plate sealing the opening of the case;
a current collecting member between the electrode assembly and the cap plate, the current collecting member having a first connection part facing away from the electrode assembly and connected with the cap plate, and a plurality of second connection parts facing the electrode assembly and connected with the electrode assembly;
the second connecting portions are located on the periphery of the first connecting portion and distributed at intervals along the circumferential direction of the current collecting piece, the second connecting portions are connected with the first connecting portions through fusing portions, and first through holes are formed between every two fusing portions which are adjacent in the circumferential direction of the current collecting piece.
In the embodiment of the application, the fuse part is connected with the cover plate through the first connecting part, and is connected with the electrode assembly through the plurality of second connecting parts, so that after the fuse part is connected with the first connecting part and the second connecting part, current flowing paths of the electrode assembly, the second connecting part, the fuse part, the first connecting part and the cover plate are formed; because the setting of first through-hole for the crossing current area of fusing part on the footpath of mass flow piece is less, thereby when energy memory took place the thermal runaway, fusing part can be fused to the electric current of instantaneous increase, thereby the security when having guaranteed energy memory and using has reduced the potential safety hazard. In addition, the flow area of the fusing part in the radial direction of the current collecting piece is small, so that the first connecting part can generate certain deformation in the thickness direction of the current collecting piece, and the compression joint stress between the cover plate and the first connecting part is further reduced conveniently.
According to an embodiment of the present application, the first connection portion protrudes from a surface of the current collector facing the cap plate, and a surface of the first connection portion facing away from the electrode assembly abuts the cap plate.
In the embodiment of the application, the end surface of the first connecting part is abutted to the cover plate, so that on one hand, the contact area between the first connecting part and the cover plate can be increased, the flow guide area between the first connecting part and the cover plate is increased, and the flow guide effect is ensured; on the other hand can avoid the destruction to the apron, guarantees the structural strength of apron.
According to an embodiment of the present application, wherein the first connection part protrudes from a surface of the current collector facing the cap plate, and the first connection part has a stepped surface facing away from the electrode assembly;
the cover plate is provided with a second through hole, the first connecting part penetrates through the second through hole, and the cover plate is supported on the step surface.
In the embodiment of the application, the first connecting portion penetrates through the second through hole, the cover plate is supported on the step surface of the first connecting portion, on one hand, the first connecting portion can be connected with the cover plate, on the other hand, the first connecting portion can be reused as an electrode column, and therefore the structure of the energy storage device is simplified.
According to an embodiment of the present application, the first connection portion has a through hole penetrating through the current collector in a thickness direction of the current collector.
In the embodiment of the application, the through hole is formed in the first connecting part to form the liquid injection hole for injecting the electrolyte, so that the situation that the liquid injection hole is separately processed on the cover plate is avoided, and the structural strength of the cover plate is ensured; in addition, the length of the through hole is larger than the thickness of the cover plate, so that when the through hole is sealed, the sealing effect on the electrolyte is improved conveniently, and the possibility of electrolyte leakage is reduced.
According to an embodiment of the present application, the second connection portion has a linear structure extending in a radial direction of the current collector, and one end of the second connection portion, which is close to the first connection portion, is connected to the fusing portion.
In the embodiment of the application, the tab arranged at the end of the electrode assembly and the plurality of tab pieces radially distributed along the current collector, which the tab comprises, are conveniently connected with the second connecting part radially arranged along the current collector after the plurality of tab pieces are stacked, so that the connection effect of the tab and the second connecting part is ensured.
According to an embodiment of the present application, a size of the first through hole in a radial direction of the current collector is greater than or equal to 0.5 mm and less than or equal to 3.0 mm.
In the embodiment of the application, the minimum size of the first through hole in the radial direction of the current collecting piece is limited, so that the fusing effect of the fusing part when the current is increased instantly can be ensured, and meanwhile, the condition that the first connecting part and the second connecting part are conducted due to electric arc after the fusing part is fused is avoided; and the size of the second connection part in the radial direction of the current collector can be ensured by defining the maximum size of the first through hole in the radial direction of the current collector to ensure the connection effect of the second connection part with the electrode assembly.
According to an embodiment of the present application, the second connection portion is an arc-shaped structure extending along a circumferential direction of the current collector.
In this application embodiment, set up the second connecting portion of arc structure, can adjust the radial ascending size of second connecting portion at the mass flow piece to increase the area of contact of second connecting portion and electrode subassembly, in order to guarantee the water conservancy diversion effect between electrode subassembly and the second connecting portion, can also adjust the radial ascending size of first through-hole at the mass flow piece simultaneously, thereby effectively guarantee the fusing effect of fusing portion.
According to an embodiment of the present application, in a radial direction of the current collecting member, a size of the first through hole is equal to a size of the fusing part, and the fusing part has an S-shaped structure.
In this application embodiment, through the size of first through-hole in the footpath of mass flow piece is injectd for fusing portion is the strip structure, and then sets up fusing portion to S-shaped structure, makes first connecting portion can produce certain deformation in the footpath of mass flow piece, and then is convenient for guarantee the setting placed in the middle of first connecting portion.
According to an embodiment of the present application, the fuse portion has a fuse hole, and an overlapping region exists between the fuse hole and the first through hole in a circumferential direction of the current collecting member.
In this application embodiment, through set up fusing hole on the fusing portion to further reduce fusing portion at the radial ascending area of class piece, thereby can further improve the fusing effect of fusing portion.
According to an embodiment of the present application, the current collector has a vent hole formed therethrough in a region other than the first connection portion, the second connection portion, and the fusing portion.
In this application embodiment, through the setting of bleeder vent on the mass flow piece, the circulation of the mass flow piece both sides air current of being convenient for, and then the injection resistance when being convenient for reduce injection electrolyte to improve and annotate the liquid effect.
According to an embodiment of the application, the surface of the cover plate facing away from the collector piece is provided with an annular groove.
In the embodiment of the application, the annular groove is arranged on the cover plate, so that the thickness of the cover plate at the position of the annular groove can be reduced, the cover plate is combined with the design that the cover plate forms an explosion-proof structure, and the structure of the energy storage device is simplified.
According to an aspect of the present application, there is provided an electrical device, which includes the energy storage device of the above aspect. In this application embodiment, combine the aforesaid energy memory, in the use of consumer, can improve the security that the consumer used based on energy memory's low potential safety hazard.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the application.
Drawings
The above and other features and advantages of the present application will become more apparent by describing in detail exemplary embodiments thereof with reference to the attached drawings.
Fig. 1 is a schematic cross-sectional structure view illustrating a unit battery according to an exemplary embodiment.
Fig. 2 is a side view schematic of a manifold, according to an exemplary embodiment.
Fig. 3 is a schematic top view of a manifold shown in accordance with an exemplary embodiment.
Fig. 4 is a schematic top view of another manifold in accordance with an exemplary embodiment.
Fig. 5 is a side view schematic diagram of another manifold in accordance with an exemplary embodiment.
Fig. 6 is a schematic top view of yet another manifold shown in accordance with an exemplary embodiment.
Wherein the reference numerals are as follows:
100. a single battery;
10. a housing; 20. an electrode assembly; 30. a cover plate; 40. a current collector;
11. an accommodating cavity;
31. a second through hole; 32. an annular groove;
41. a first connection portion; 42. a second connecting portion; 43. a fusing portion; 44. a first through hole; 45. a through hole; 46. air holes are formed;
411. a step surface.
Detailed Description
Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and thus their detailed description will be omitted.
The embodiment of the application provides an energy storage device which can be 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 is a single battery, the energy storage device can be a square single battery or a cylindrical single battery. The energy storage device is taken as a single battery as an example, and the energy storage device is explained in detail below.
Fig. 1 illustrates a schematic structural diagram of a single battery 100 provided in an embodiment of the present application, and fig. 2 illustrates a schematic structural diagram of a top view of a current collector 40 provided in an embodiment of the present application. As shown in fig. 1 and 2, the unit battery 100 includes: the battery pack comprises a shell 10, an electrode assembly 20, a cover plate 30 and a current collecting piece 40, wherein the shell 10 is provided with an opening and an accommodating cavity 11; the electrode assembly 20 is accommodated in the accommodation chamber 11; the cover plate 30 seals the opening of the case 10; the current collector 40 is positioned between the electrode assembly 20 and the cap plate 30, the current collector 40 having a first connection part 41 facing away from the electrode assembly 20 and connected with the cap plate 30, and a plurality of second connection parts 42 facing the electrode assembly 20 and connected with the electrode assembly 20; the plurality of second connection portions 42 are located on the periphery of the first connection portion 41 and are distributed at intervals along the circumferential direction of the current collecting member 40, the plurality of second connection portions 42 are all connected with the first connection portion 41 through the fusing portions 43, and a first through hole 44 is formed between every two fusing portions 43 adjacent to each other in the circumferential direction of the current collecting member 40.
In the present embodiment, the first connection portion 41 is connected to the cap plate 30, the second connection portions 42 are connected to the electrode assembly 20, and the fuse portion 43 is connected to the first connection portion 41 and the second connection portion 42, thereby forming a current flow path for the electrode assembly 20, the second connection portion 42, the fuse portion 43, the first connection portion 41, and the cap plate 30; due to the arrangement of the first through hole 44, the over-current area of the fusing part 43 in the radial direction of the current collecting piece 40 is small, so that when the thermal runaway of the energy storage device occurs, the fusing part 43 can be fused by the instantaneously increased current, the safety of the energy storage device during use is ensured, and the potential safety hazard is reduced. In addition, since the flow area of the fusing part 43 in the radial direction of the current collector 40 is small, the first connection part 41 can be deformed in the thickness direction of the current collector 40 to some extent, thereby facilitating reduction of the pressure contact stress between the cap plate 30 and the first connection part 41.
In the embodiment of the present application, the unit battery 100 includes another current collecting member connecting the electrode assembly 20 and the bottom of the case 10 in addition to the current collecting member 40 described above, and the current collecting member may have the same or different structure from the current collecting member 40 between the electrode assembly 20 and the cap plate 30. When the structures are different, reference may be made to the related art for a specific structure of a current collector connecting the electrode assembly 20 and the bottom of the case 10, which is not limited in the embodiments of the present application.
The housing 10 is a cylindrical structure with an opening at one end, and an accommodating cavity 11 is defined by the cylindrical wall. The electrode assembly 20 includes a winding core body and a tab disposed at an end of the winding core body, the winding core body is formed by winding or stacking two electrode sheets having different polarities, a tab piece extends from a side edge of the electrode sheet, and at least one tab piece forms a tab. The second connection portion 42 of the current collecting member 40 is connected (e.g., connected by ultrasonic welding) to the tabs included in the electrode assembly 20.
The first connection portion 41 of the current collecting member 40 and the cap plate 30 may be connected by welding (e.g., laser welding), or may be connected by riveting, or may be connected by other methods, or may be connected by various combinations.
In the present embodiment, the first connection portion 41 protrudes from the surface of the current collector 40 facing away from the electrode assembly 20, and the second connection portion 42 protrudes from the surface of the current collector 40 facing toward the electrode assembly 20, so that only current flowing paths of the electrode assembly 20, the second connection portion 42, the fusing portion 43, the first connection portion 41, and the cap plate 30 are formed after the first connection portion 41 is connected to the cap plate 30 and the second connection portion 42 is connected to the electrode assembly 20. Further, when the fuse portion 43 is fused by an instantaneously increased current, a portion of the fuse portion 43 near the first connection portion 41 is not electrically connected to the electrode assembly 20, and a portion of the fuse portion 43 near the second connection portion 42 is not electrically connected to the cap plate 30, so that a potential safety hazard when thermal runaway occurs in the unit battery 100 is reduced.
In some embodiments, as shown in fig. 3, the first connection part 41 protrudes from a surface of the current collector 40 facing the cap plate 30, and a surface of the first connection part 41 facing away from the electrode assembly 20 abuts the cap plate 30.
In this way, by abutting the end surface of the first connection portion 41 against the cover plate 30, on one hand, the contact area between the first connection portion 41 and the cover plate 30 can be increased, so as to increase the flow guide area between the first connection portion 41 and the cover plate 30, thereby ensuring the flow guide effect; on the other hand, the damage to the cover plate 30 can be avoided, and the structural strength of the cover plate 30 is ensured.
The surface of the cover plate 30 opposite to the electrode assembly 20 may be penetration welded to connect the first connection portion 41 and the cover plate 30, or the first connection portion 41 and the cover plate 30 may be connected by means of conductive adhesive, so long as the current guiding effect between the first connection portion 41 and the cover plate 30 is ensured. The first connection portion 41 can be bonded to the cover plate 30 by a conductive adhesive, so that the contact effect between the surface of the first connection portion 41 facing away from the electrode assembly 20 and the cover plate 30 can be ensured, and the current guiding effect can be further ensured.
The first connecting portion 41 may be a columnar protruding structure, such as a cylindrical protrusion, a square columnar protrusion, a circular truncated cone protrusion, or the like; the first connection portion 41 is located at the center of the current collecting member 40 to ensure the stability of the current collecting member 40 when the first connection portion 41 is connected to the cap plate 30, and to avoid the inclination of the current collecting member 40.
In other embodiments, as shown in fig. 4, the first connection part 41 protrudes from a surface of the current collector 40 facing the cap plate 30, and the first connection part 41 has a stepped surface 411 facing away from the electrode assembly 20; the cover plate 30 has a second through hole 31, the first connection portion 41 passes through the second through hole 31, and the cover plate 30 is supported on the stepped surface 411.
In this way, the first connection part 41 passes through the second through hole 31, and the cap plate 30 is supported on the stepped surface 411 of the first connection part 41, so that the connection between the first connection part 41 and the cap plate 30 can be ensured while avoiding the connection between the region of the current collector 40 other than the first connection part 41 and the cap plate 30, and the first connection part 41 can be reused as an electrode post to serve as one output terminal of the unit battery 100, thereby simplifying the structure of the unit battery 100.
Here, since the first connection portion 41 passes through the second through hole 31, the first connection portion 41 can be connected to the cover plate 30 by riveting. Illustratively, the portion of the first connecting portion 41 extending out of the second through hole 31 has an external thread, and the first connecting portion 41 can be connected to the cover plate 30 by tightening a lock nut onto the first connecting portion 41. Alternatively, the first connection portion 41 may be provided with an external thread at a position close to the step surface 411, and the second through hole 31 may be an internal thread hole, at this time, the first connection portion 41 may be connected to the cover plate 30 by a threaded connection. Of course, the first connection portion 41 and the cover plate 30 may be welded first, and then the first connection portion 41 and the cover plate 30 are connected by riveting, so as to improve the stability of the connection between the first connection portion 41 and the cover plate 30, which is not limited in the embodiment of the present disclosure.
Alternatively, as shown in fig. 4, the first connection portion 41 has a through hole 45 penetrating through the current collector 40 in the thickness direction of the current collector 40. In this way, the through hole 45 is formed in the first connecting portion 41 to form a liquid injection hole for injecting the electrolyte, so that the situation that the liquid injection hole is separately processed on the cover plate 30 is avoided, and the structural strength of the cover plate 30 is ensured; in addition, because the length of the through hole 45 is greater than the thickness of the cover plate 30, when the through hole 45 is sealed, the contact area between the sealing element and the hole wall of the through hole 45 can be increased, so that the sealing effect on the electrolyte is improved conveniently, and the possibility of leakage of the electrolyte is reduced.
The structure of the sealing member for sealing the through hole 45 may refer to the related art, which is not limited in the embodiments of the present application. Illustratively, the seal is a sealing plug.
In the present embodiment, the second connection portion 42 may have a linear structure extending in the radial direction of the manifold 40, or may have an arc structure extending in the circumferential direction of the manifold 40.
Alternatively, a plurality of second connection portions 42 are uniformly distributed along the circumferential direction of the current collector 40, for example, as shown in fig. 2, the current collector 40 includes three second connection portions 42, and the arc angle between two adjacent second connection portions 42 is 120 degrees in the circumferential direction of the current collector 40.
In some embodiments, as shown in fig. 2, the second connection portion 42 is a linear structure extending in a radial direction of the current collector 40, and one end of the second connection portion 42 near the first connection portion 41 is connected to the fusing portion 43.
Therefore, in combination with the above-mentioned condition that the tab includes a plurality of tab pieces, after the plurality of tab pieces are stacked, the tab is conveniently connected with the second connecting portion 42 radially arranged along the current collecting piece 40, so as to ensure the connection effect of the tab and the second connecting portion 42.
Since the size of the first through hole 44 in the radial direction of the current collector 40 determines the size of the fusible region on the fusing part 43, in order to secure a sufficient fusible region on the fusing part 43, the size of the first through hole 44 in the radial direction of the current collector 40 may be optionally greater than or equal to 0.5 mm. In this way, by limiting the minimum size of the first through hole 44 in the radial direction of the current collector 40, the minimum fusing area on the fusing part 43 can be ensured, and then the fusing effect of the fusing part 43 when the current is increased instantaneously is ensured, and meanwhile, the condition that the first connecting part 41 and the second connecting part 42 are conducted due to the generation of the arc after the fusing part 43 is fused is avoided.
Alternatively, the size of the first through hole 44 in the radial direction of the current collector 40 is less than or equal to 3.0 mm. As such, by defining the maximum size of the first through hole 44 in the radial direction of the current collecting member 40, the maximum size of the fusing part 43 in the radial direction of the current collecting member 40 is defined to ensure that the second connection part 42 has a sufficient length in the radial direction of the current collecting member 40 to ensure the connection effect of the second connection part 42 with the electrode assembly 20.
In other embodiments, as shown in fig. 5, the second connection portion 42 is an arc-shaped structure extending in the circumferential direction of the manifold 40. In this way, the second connection part 42 having the arc structure is provided, and the size of the second connection part 42 in the radial direction of the current collector 40 can be adjusted, so that the contact area between the second connection part 42 and the electrode assembly 20 is increased, and the current guiding effect between the electrode assembly 20 and the second connection part 42 is ensured, and the size of the first through hole 44 in the radial direction of the current collector 40 can also be adjusted, so that the fusing effect of the fusing part 43 is effectively ensured.
Alternatively, the size of the first through hole 44 in the radial direction of the current collector 40 is greater than or equal to 0.5 mm. In this way, by limiting the minimum size of the first through hole 44 in the radial direction of the current collector 40, the minimum fusing area on the fusing part 43 can be ensured, and then the fusing effect of the fusing part 43 when the current is increased instantaneously can be ensured, and meanwhile, the condition that the first connecting part 41 and the second connecting part 42 are conducted due to the generation of the arc after the fusing part 43 is fused is avoided.
Alternatively, in the radial direction of the current collecting member 40, the size of the first through hole 44 is equal to the size of the fusing part 43, and the fusing part 43 has an S-shaped structure. Like this, through the size of first through-hole 44 in the radial of mass flow piece 40 is injectd for fusing 43 is the strip structure, and then sets up fusing 43 to the S-shaped structure, makes first connecting portion 41 can produce certain deformation in the footpath of mass flow piece 40, and then is convenient for guarantee the setting in the middle of first connecting portion 41.
In some embodiments, the fusing part 43 has a fusing hole, and there is an overlapping region of the fusing hole and the first through hole 44 in the circumferential direction of the current collecting member 40. In this manner, by providing the fusing hole in the fusing portion 43, the flow area of the fusing portion 43 in the radial direction of the current collector 40 is further reduced, and the fusing effect of the fusing portion 43 can be further improved.
Alternatively, the number of the fusing holes on the fusing part 43 may be plural, and the plural fusing holes are distributed along the circumferential direction of the current collecting member 40.
In some embodiments, as shown in fig. 6, the current collector 40 has the vent hole 46 formed therethrough in a region other than the first connection portion 41, the second connection portion 42, and the fusing portion 43. Thus, through the arrangement of the air holes 46 on the current collecting piece 40, the circulation of air flows on two sides of the current collecting piece 40 is facilitated, and further the injection resistance when the electrolyte is injected is facilitated to be reduced, so that the liquid injection effect is improved, and meanwhile, the infiltration of the electrolyte on the electrode assembly 20 is facilitated.
The air holes 46 may be distributed in an array along the circumferential direction and the radial direction of the flow collecting member 40, and certainly, the air holes 46 may also be distributed at will as long as the effective circulation of the air flow on both sides of the flow collecting member 40 can be achieved, which is not limited in the embodiment of the present invention.
In some embodiments, as shown in fig. 3 or 4, the surface of the cover plate 30 facing away from the current collector 40 is provided with an annular groove 32. Therefore, the thickness of the cover plate 30 at the position of the annular groove 32 can be reduced by arranging the annular groove 32 on the cover plate 30, so that the design of an explosion-proof structure is formed by combining the structure of the cover plate 30, and the structure of the energy storage device is simplified.
The cross section of the annular groove 32 on the cover plate 30 may be a V-shaped structure, an arc-shaped structure, or the like, and the depth of the annular groove 32 reduces the thickness of the cover plate 30 at the position of the annular groove 32, so as to adjust the explosion-proof pressure of the single battery 100 and reduce the potential safety hazard of the single battery 100.
When the cover plate 30 includes a plurality of annular grooves 32, the covering area of the explosion-proof structure on the cover plate 30 is increased, and the safety of the single battery 100 is further ensured. And the greater the number of the annular grooves 32 on the cap plate 30, the poorer the structural strength of the cap plate 30, and thus the structural strength of the cap plate 30 is ensured while ensuring the safety of the unit battery 100 in use, as shown in fig. 3 or 4, the two number of the annular grooves 32 on the cap plate 30.
The embodiment of the application also provides electric equipment, and the electric equipment comprises the energy storage device. The electric device can be an energy storage device, a vehicle, an energy storage container and the like. So, combine the aforesaid, the consumer of this application can improve the security that the consumer used based on energy memory's low potential safety hazard in the use.
In the application examples, the terms "first", "second" and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance; the term "plurality" means two or more unless expressly limited otherwise. The terms "mounted," "connected," "fixed," and the like are to be construed broadly, and for example, "connected" may be a fixed connection, a removable connection, or an integral connection; "coupled" may be direct or indirect through an intermediary. The specific meanings of the above terms in the examples of the application can be understood by those skilled in the art according to specific situations.
In the description of the embodiments of the present application, it should be understood that the terms "upper", "lower", "left", "right", "front", "rear", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience in describing the embodiments of the present application and for simplification of description, but do not indicate or imply that the devices or units referred to must have specific directions, be configured and operated in specific orientations, and thus, should not be construed as limiting the embodiments of the present application.
In the description of the present specification, the description of "one embodiment," "some embodiments," "specific embodiments," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the embodiments. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The above description is only a preferred embodiment of the claimed embodiments and is not intended to limit the claimed embodiments, and various modifications and changes may be made to the claimed embodiments by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the applied embodiment shall be included in the protection scope of the applied embodiment.
Claims (12)
1. An energy storage device, comprising:
a housing (10) having an opening and provided with an accommodating chamber (11);
an electrode assembly (20) housed in the housing chamber (11);
a cover plate (30) sealing an opening of the case (10);
a current collecting member (40) between the electrode assembly (20) and the cap plate (30), the current collecting member (40) having a first connection portion (41) facing away from the electrode assembly (20) and connected with the cap plate (30), and a plurality of second connection portions (42) facing the electrode assembly (20) and connected with the electrode assembly (20);
the second connecting portions (42) are located on the periphery of the first connecting portion (41) and distributed at intervals along the circumferential direction of the current collecting piece (40), the second connecting portions (42) are connected with the first connecting portions (41) through fusing portions (43), and first through holes (44) are formed between every two fusing portions (43) which are adjacent in the circumferential direction of the current collecting piece (40).
2. The energy storage device according to claim 1, wherein the first connection portion (41) protrudes from a surface of the current collecting member (40) facing the cap plate (30), and a surface of the first connection portion (41) facing away from the electrode assembly (20) abuts against the cap plate (30).
3. The energy storage device according to claim 1, wherein the first connection portion (41) protrudes from a surface of the current collecting member (40) facing the cap plate (30), and the first connection portion (41) has a stepped surface (411) facing away from the electrode assembly (20);
the cover plate (30) has a second through hole (31), the first connecting portion (41) passes through the second through hole (31), and the cover plate (30) is supported on the step surface (411).
4. The energy storage device according to claim 3, wherein the first connection portion (41) has a through hole (45) penetrating through the current collector (40) in a thickness direction of the current collector (40).
5. The energy storage device according to claim 1, wherein the second connection portion (42) is a linear structure extending in a radial direction of the current collector (40), and one end of the second connection portion (42) near the first connection portion (41) is connected to the fusing portion (43).
6. The energy storage device according to claim 5, wherein the first through hole (44) has a dimension in a radial direction of the current collector (40) of 0.5 mm or more and 3.0 mm or less.
7. The energy storage device according to claim 1, wherein the second connecting portion (42) is an arc-shaped structure extending in a circumferential direction of the current collector (40).
8. Energy storage device according to claim 7, characterized in that in the radial direction of the current collector (40) the first through hole (44) has a size equal to the size of the fuse (43) and the fuse (43) has an S-shaped configuration.
9. Energy storage device according to any of claims 1 to 8, characterized in that the fuse part (43) has a fuse hole and that the fuse hole and the first through hole (44) overlap in the circumferential direction of the current collector (40).
10. The energy storage device according to any one of claims 1 to 8, wherein the current collecting member (40) has a vent hole (46) therethrough in a region other than the first connection portion (41), the second connection portion (42), and the fusion portion (43).
11. Energy storage device according to any one of claims 1 to 8, characterized in that the surface of the cover plate (30) facing away from the collecting member (40) is provided with an annular groove (32).
12. An electrical consumer, characterized in that the consumer comprises an energy storage device according to any of the preceding claims 1-11.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211642354.7A CN115882129A (en) | 2022-12-20 | 2022-12-20 | Energy storage device and electric equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211642354.7A CN115882129A (en) | 2022-12-20 | 2022-12-20 | Energy storage device and electric equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115882129A true CN115882129A (en) | 2023-03-31 |
Family
ID=85754115
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211642354.7A Pending CN115882129A (en) | 2022-12-20 | 2022-12-20 | Energy storage device and electric equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115882129A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116404280A (en) * | 2023-06-05 | 2023-07-07 | 厦门海辰储能科技股份有限公司 | Energy storage device and electric equipment |
-
2022
- 2022-12-20 CN CN202211642354.7A patent/CN115882129A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116404280A (en) * | 2023-06-05 | 2023-07-07 | 厦门海辰储能科技股份有限公司 | Energy storage device and electric equipment |
| CN116404280B (en) * | 2023-06-05 | 2023-08-29 | 厦门海辰储能科技股份有限公司 | Energy storage device and electric equipment |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP3618148B1 (en) | Battery module having structure breaking connector by using venting gas | |
| KR101370265B1 (en) | Secondary battery, Element for secondary battery applied for it and Method of manufacturing the same | |
| KR101858317B1 (en) | Pouch type secondary battery comprising a current interrupt electrode lead | |
| JP5703573B2 (en) | Secondary battery | |
| JP5590391B2 (en) | Secondary battery | |
| KR102253021B1 (en) | Rechargeable battery having fuse and battery module | |
| KR101939832B1 (en) | Battery module and battery pack including the same and method for manufacturing a battery module casing | |
| KR20140094205A (en) | Rechargeable battery | |
| CN115882129A (en) | Energy storage device and electric equipment | |
| CN110299502A (en) | Secondary cell | |
| KR101846050B1 (en) | Pouch type secondary battery comprising a current interrupt electrode lead | |
| JP7481431B2 (en) | Power battery top cover and power battery | |
| KR20150029413A (en) | Rechargeable battery having fuse | |
| JP6709532B2 (en) | Storage element | |
| CN218996882U (en) | Energy storage device and electric equipment | |
| EP4075589A1 (en) | Battery, electric device, and battery manufacturing method and device | |
| KR101856822B1 (en) | Pouch type secondary battery comprising a current interrupt electrode lead | |
| US11245162B2 (en) | Secondary battery | |
| CN114759296A (en) | Micro-resistor forced-overcurrent safety top cover structure | |
| KR101243550B1 (en) | Secondary battery improved safety characteristic using fixing element | |
| JP7056167B2 (en) | Power storage module and manufacturing method of power storage module | |
| KR20170040629A (en) | Battery module and battery pack including the same | |
| JP2001118604A (en) | Non-aqueous electrolytic solution type secondary battery | |
| KR100420149B1 (en) | Secondray battery applying safety device | |
| US11355826B2 (en) | Secondary battery |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |