CN218602701U

CN218602701U - Current collector and cover plate connecting structure of energy storage element monomer

Info

Publication number: CN218602701U
Application number: CN202222855778.3U
Authority: CN
Inventors: 车玲娟; 孙玉平; 孙伟; 王俊华
Original assignee: Gmcc Electronic Technology Wuxi Co ltd
Current assignee: Gmcc Electronic Technology Wuxi Co ltd
Priority date: 2022-10-28
Filing date: 2022-10-28
Publication date: 2023-03-10
Anticipated expiration: 2032-10-28

Abstract

The utility model discloses a connection structure of a current collector and a cover plate of an energy storage element monomer, wherein the current collector comprises a pole part and a current collecting part, the pole part is vertically arranged in the center of the current collecting part and penetrates through the cover plate, and a retainer ring is sleeved outside the part of the pole part penetrating out of the cover plate for positioning; the plate surface of the current collecting part is provided with a plurality of positioning sheets and a plurality of holes, and the positioning sheets are vertically arranged on the current collecting part and are arranged on the periphery of the pole part; a plurality of second positioning grooves are formed in the cover plate, the second positioning grooves correspond to the positioning pieces, and the positioning pieces are inserted into the second positioning grooves. The utility model discloses a be provided with location structure between mass flow body and the apron, respectively to axial, circumference and radially fixing a position the two, after the mass flow body is fixed with electric core, when radially assembling with the apron again, can confirm the relative position of mass flow body and apron through the two location structure, prevent that the skew takes place for the relative position of the two, guarantee the distribution homogeneity in electric core periphery space, improve energy storage element's energy density.

Description

Current collector and cover plate connecting structure of energy storage element monomer

Technical Field

The utility model belongs to the technical field of the energy storage component technique and specifically relates to a free mass flow body of energy storage component and apron connection structure.

Background

The energy storage element is widely applied to vehicles, electronic products, energy storage systems, transportation, smart power grids, industrial energy conservation and consumption reduction and other industries, and the energy storage element technology is an important factor related to the development of the energy storage element technology. The energy storage element monomer generally comprises a positive electrode, a negative electrode, a shell, an electrolyte, a cover plate, a pole and the like.

In the prior art, there is usually no positioning structure between the single current collector, the pole and the cover plate of the energy storage element, and when assembling, the relative positions of the current collector, the pole and the cover plate are easy to shift, so that the spatial distribution of the periphery of the battery cell is not uniform, and the energy density of the energy storage element is further influenced. After the pole and the current collector of the energy storage element monomer are respectively and independently designed and processed, the pole and the current collector are fixedly connected by welding, so that the processing procedure and the installation procedure are relatively complicated, and the cost is relatively high; and non-energy storage elements such as a current collector, a pole and the like need to occupy the limited space in the energy storage element monomer, so that the space of the energy storage element is reduced, the utilization rate of the internal space of the energy storage element monomer is reduced, and the energy density of the energy storage element monomer is reduced.

The utility model discloses a sealed energy storage element is sealed, the sealed pad that adopts the conventionality usually between the free utmost point post of current energy storage element and the apron, does not receive extra radial force effect between sealed pad and the utmost point post, pastes tightly to realize sealedly in order to ensure sealed pad inner peripheral surface and utmost point post outer peripheral face, and the requirement of size precision to sealed pad inner peripheral surface and utmost point post outer peripheral face is higher, if size deviation is great, then probably makes to paste the degree of tightness between sealed pad and the utmost point post not enough, and then influences sealed effect, reduces sealing reliability. The single shell and the cover plate of the existing energy storage element are usually fixed by welding, a sealing element is not usually arranged between the shell and the cover plate, the sealing performance inside the energy storage element is influenced, and the sealing reliability is not high enough.

SUMMERY OF THE UTILITY MODEL

The applicant aims at the defects of the existing single energy storage element, provides a current collector and cover plate connecting structure of the single energy storage element with a reasonable structure, positions the current collector and the cover plate through a positioning structure, prevents the relative positions of the current collector and the cover plate from shifting, improves energy density and improves sealing reliability.

The utility model discloses the technical scheme who adopts as follows:

a current collector and cover plate connecting structure of an energy storage element monomer is characterized in that the current collector comprises a pole part and a current collecting part, the pole part is vertically arranged in the center of the current collecting part and penetrates through a cover plate, and a retainer ring is sleeved outside the part of the pole part penetrating out of the cover plate for positioning; the plate surface of the current collecting part is provided with a plurality of positioning sheets and a plurality of holes, and the positioning sheets are vertically arranged on the current collecting part and are arranged on the periphery of the pole part; a plurality of second positioning grooves are formed in the cover plate, the second positioning grooves correspond to the positioning pieces, and the positioning pieces are inserted into the second positioning grooves.

As a further improvement of the technical scheme:

the positioning piece is formed by upward bending after being torn from the plate surface of the current collecting part, and the bottom side edge of the positioning piece is connected with the plate surface of the current collecting part; the position of the header part torn by the positioning piece is correspondingly provided with an opening.

The pole column part, the flow collecting part and the positioning piece are integrally formed.

The outer peripheral surface of the pole part is provided with a first positioning groove, and the check ring is clamped in the first positioning groove.

A first sealing element is arranged between the pole part and the cover plate, and the first sealing element is sleeved on the periphery of the pole part.

The first sealing element is provided with a groove with a downward opening, the side surface of the groove, which is close to one side of the pole part, is a first inclined surface, and the first inclined surface inclines downwards and inwards from top to bottom.

The first sealing element is a V-shaped ring or a Y-shaped ring, a V-shaped groove with a downward opening is formed in the lower portion of the first sealing element, and two side faces of the V shape are symmetrically arranged.

The lower part of the first sealing element is provided with a trapezoidal groove with an opening facing downwards and being small at the top and big at the bottom.

The cover plate is provided with a counter bore, and the first sealing element is arranged in the counter bore.

The cover plate is made of an insulating material.

The beneficial effects of the utility model are as follows:

(1) The utility model discloses a be provided with location structure between mass flow body and the apron, respectively to axial, circumference and radially fixing a position the two, after the mass flow body is fixed with electric core, when radially assembling with the apron again, can confirm the relative position of mass flow body (and electric core) and apron through the location structure of the two, prevent that the skew takes place for the relative position of the two, guarantee the distribution homogeneity in electric core periphery space, improve energy storage element's energy density. The pole post part, the current collecting part and the positioning sheet of the current collector are integrally formed, and when the positioning sheet is processed, the opening hole is also processed at the same time, and the opening hole can be used as a liquid injection hole, so that the processing procedure is saved, the processing difficulty is reduced, and the processing cost is reduced; the pole part and the current collecting part are integrally designed on one piece by the current collector, so that the element is saved, the assembly process is saved, the material cost and the manufacturing cost are reduced, and compared with an independent design and assembly mode in the prior art, the integrated design avoids the problem that the power transmission performance is influenced due to poor contact in the assembly process, the power transmission is more reliable, and the power transmission performance is better. The outer peripheral surface of the pole part is provided with a first positioning groove.

(2) The utility model discloses a first sealing member between apron and the pole portion closely pastes tightly on the apron under the free interior pressure effect of energy storage component, the effort of simultaneously acting on its first inclined plane has a radial inward component force, this radial inward component force closely compresses tightly the inside portion of first sealing member to the pole portion and realizes sealedly, the free interior pressure of energy storage component is big more, the radial inward component force that produces just is big more, first sealing member just is compressed tightly on the pole portion more, and the degree of closeness between the pole portion just is high more, sealing effect is better, the sealing reliability is high; and because of the action of the radial component force, even if the size of the outer peripheral surface of the pole part is slightly deviated, the first sealing element can be pressed onto the pole part under the action of the radial component force, the sealing effect is not influenced, the sealing reliability is high, and the processing requirement of the pole part is reduced.

Drawings

Fig. 1 is an exploded view of the present invention.

Fig. 2 is a cross-sectional view of the present invention.

Fig. 3 is an enlarged view of a portion a in fig. 2.

Fig. 4 is a perspective view of a current collector.

Fig. 5 is a perspective view of the cover plate.

In the figure: 1. a housing; 11. a support ring; 12. flanging; 2. an electric core; 3. a current collector; 31. a pole section; 32. a current collecting portion; 33. positioning plates; 34. opening a hole; 35. a first positioning groove; 4. a cover plate; 41. a counter bore; 42. a sealing groove; 43. a second positioning groove; 5. a first seal member; 51. a groove; 52. a first inclined plane; 53. a second inclined plane; 6. a second seal member; 7. and a retainer ring.

Detailed Description

The following describes embodiments of the present invention with reference to the drawings.

As shown in fig. 1 and 2, the utility model discloses a shell 1 is the open, bottom surface confined cylinder of top surface, and 2 cartridges of columniform electric core are in

shell

1, and 2 tops of electric core are connected with the

mass flow body

3, and 3 outer jackets of mass flow body establish apron 4, and apron 4 is fixed at 1 upper end of shell. Be provided with first sealing member 5 between apron 4 and the mass flow body 3, be provided with second sealing member 6 between apron 4 and the shell 1, apron 4 adopts insulating material.

As shown in fig. 1, the bottom surface (positive electrode) of the battery cell 2 is fixed on the bottom surface of the casing 1 by conductive adhesive, and is electrically conducted with the casing 1 by conductive adhesive; the electric core 2 can also be fixedly connected to the bottom surface of the shell 1 by means of soldering, resistance welding or laser welding and is directly and electrically communicated with the shell 1. The battery core 2 is directly contacted with the shell 1 to realize electric conduction, so that the use of a positive pole adapter current collector is saved, the circulation of current is shortened, and the power transmission performance is improved; and the adaptor current collecting piece is saved, the space occupation of the non-energy storage element is reduced, the occupied space of the energy storage element is increased, the space utilization rate in the shell 1 is increased, and therefore the energy density of the energy storage element is increased.

As shown in fig. 3, a ring-shaped support ring 11 is formed at the upper end of the housing 1 and is recessed radially inward below the cover plate 4, a ring-shaped flange 12 is formed at the upper side of the housing 1 and is folded radially inward by 90 degrees above the cover plate 4, the flange 12 presses the cover plate 4 onto the support ring 11, and the support ring 11 cooperates with the flange 12 to axially position the cover plate 4 and fix the cover plate 4 on the housing 1.

As shown in fig. 1, 2, and 4, the current collector 3 includes a pillar portion 31 and a current collecting portion 32, and the pillar portion 31 is formed to protrude vertically upward from the center of the current collecting portion 32. A plurality of positioning pieces 33 are arranged on the plate surface of the current collecting part 32 and positioned at the periphery of the pole part 31, the positioning pieces 33 are formed by tearing and cracking from the plate surface of the current collecting part 32 and bending upwards for 90 degrees, the positioning pieces 33 vertically protrude on the current collecting part 32, and the bottom side edge of the positioning pieces is connected with the plate surface of the current collecting part 32; on the current collecting part 32, the position torn at the positioning piece 33 corresponds and forms trompil 34, and the trompil 34 can regard as the notes liquid hole of mass flow body 3, and electrolyte can utilize trompil 34 to annotate the liquid, has practiced thrift the process of additionally seting up notes liquid hole, has reduced the processing degree of difficulty, has reduced the processing cost. The pole part 31, the current collecting part 32 and the positioning sheet 33 are integrally formed, and the opening 34 is processed simultaneously when the positioning sheet 33 is processed, so that the processing procedure is saved, and the processing cost is reduced; the current collector 3 integrates and designs the pole part 31 and the current collecting part 32 on one piece, so that the element is saved, the assembly process is saved, the material cost and the manufacturing cost are reduced, and compared with the independent design and assembly mode in the prior art, the integrated design also avoids the problem that the power transmission performance is influenced due to poor contact in the assembly process, the power transmission is more reliable, and the power transmission performance is better. The outer peripheral surface of the pole portion 31 is provided with a first positioning groove 35. As shown in fig. 2 and 3, the pole part 31 is passed through the central through hole of the cover plate 4, and the retainer ring 7 is fitted around the part where the pole part 31 is passed through the cover plate 4 for positioning. The first positioning groove 35 of the pole part 31 is positioned on the upper side of the cover plate 4, the retainer ring 7 is clamped in the first positioning groove 35, the retainer ring 7 and the first positioning groove 35 are matched to form an axial positioning structure, the current collector 3 is axially positioned, and the current collector 3 is prevented from axially moving.

As shown in fig. 1, 2, and 5, a counterbore 41 is formed below the central through hole of the cover plate 4 and outside the pole portion 31, and the first seal 5 is disposed in the counterbore 41 and around the pole portion 31. The first sealing element 5 is a V-shaped ring, a V-shaped groove 51 with a downward opening is formed in the lower side surface of the first sealing element, as shown in fig. 3, a first inclined surface 52 is formed on the side surface of the groove 51 close to the pole portion 31, a second inclined surface 53 is formed on the opposite side surface of the groove, the first inclined surface 52 and the second inclined surface 53 are symmetrically arranged, the first inclined surface 52 is inclined inward from top to bottom, and the second inclined surface 53 is inclined outward from top to bottom. As can be seen from the dotted line arrows in fig. 3, the first sealing member 5 tightly abuts against the cover plate 4 under the internal pressure of the energy storage element unit, and at the same time, the acting force acting on the first inclined surface 52 has a radially inward component that tightly presses the inner side portion of the first sealing member 5 against the pole portion 31 to achieve sealing, and the greater the internal pressure of the energy storage element unit, the greater the generated radially inward component, the closer the first sealing member 5 is pressed against the pole portion 31 and the pole portion 31 is, the better the sealing effect is, and the higher the sealing reliability is; further, due to the action of the radial component force, even if the outer peripheral surface of the pole portion 31 has a slight variation in size, the first seal 5 can be pressed against the pole portion 31 by the action of the radial component force, and the sealing effect is not affected, and the sealing reliability is high. In another embodiment, the first sealing element 5 may also be a Y-shaped ring, a V-shaped groove 51 with a downward opening is formed in the lower portion of the Y-shaped ring, a first inclined surface 52 is formed on one side of the groove 51 close to the pole portion 31, a second inclined surface 53 is formed on the other opposite side of the groove 51, the first inclined surface 52 and the second inclined surface 53 are symmetrically arranged, the first inclined surface 52 is inclined inward from top to bottom, and the second inclined surface 53 is inclined outward from top to bottom. In another embodiment, a circular ring-shaped or circular ring-shaped first sealing member 5 may have a lower portion provided with a trapezoidal groove 51 having a downward opening and a smaller upper portion and a larger lower portion, a side surface of the groove 51 on a side close to the pole portion 31 is a first inclined surface 52, another side surface symmetrically disposed is a second inclined surface 53, the first inclined surface 52 is inclined inward from top to bottom, and the second inclined surface 53 is inclined outward from top to bottom. Of course, in other embodiments, the annular first seal 5 may be provided with a groove 51 having another shape with a downward opening, and as long as the groove 51 has a first inclined surface 52 inclined downward from top to bottom on a side close to the pole portion 31, the purpose of pressing the first seal 5 against the pole portion 31 by generating a radially inward component force under the action of the internal pressure can be achieved. Adopt the water logging method right energy storage element monomer carry out airtight test and verify its leakproofness: connecting an energy storage element monomer with an air pipe, wherein the air pipe is communicated with the inside of the energy storage element monomer, and a barometer is arranged on the air pipe; the energy storage element monomer is put into water, the air pipe is ventilated, the air pressure value of the air pressure gauge is adjusted to be changed within the range of 0.1-0.45 Mpa (0.45 Mpa is the maximum air pressure of an experimental air source), when the air pressure reaches 0.45Mpa, 30s is kept, no bubbles are generated in the water, and therefore the fact that gas does not leak from the energy storage element monomer even when the energy storage element monomer is subjected to the maximum internal pressure (0.45 Mpa) is proved, the single energy storage element monomer also has good sealing performance and high sealing reliability when being subjected to the large internal pressure is proved.

A circle of sealing groove 42 is formed in the peripheral surface of the cover plate 4, and the second sealing element 6 is sleeved in the sealing groove 42 and seals a fit clearance between the cover plate 4 and the shell 1, so that the sealing performance of the energy storage element is improved, and the sealing reliability is higher; the second sealing member 6 is an O-shaped ring. In other embodiments, the sealing groove 42 may be formed on the joint surface of the cover plate 4 with the support ring 11 and the flange 12.

On the apron 4, be located the counter bore 41 periphery and seted up a plurality of second constant head tank 43, second constant head tank 43 is corresponding with the spacer 33 of the mass flow body 3, and in the spacer 33 inserted second constant head tank 43, spacer 33 and the cooperation of second constant head tank 43 constitute location structure, carry out circumference and radial positioning simultaneously with apron 4 to the mass flow body 3, prevent the mass flow body 3 and apron 4 circumference and radial play. The second positioning slot 43 is a blind hole, which ensures that the cover plate 4 is sealed while the positioning function is realized by matching with the positioning sheet 33.

Be provided with location structure between mass flow body 3 and the apron 4, respectively to the axial of the two, circumference and radially fix a position, after mass flow body 3 is fixed with electric core 2, when radially assembling with apron 4 again, can confirm the relative position of mass flow body 3 (and electric core 2) and apron 4 through the location structure of the two, prevent that the relative position of the two from taking place the skew, guarantee the distribution uniformity in 2 periphery spaces of electric core, improve energy storage element's energy density.

The above description is illustrative of the present invention and is not intended to limit the present invention, and the present invention may be modified in any manner without departing from the spirit of the present invention.

Claims

1. The utility model provides a solitary mass flow body of energy storage component and apron connection structure which characterized in that: the current collector (3) comprises a pole part (31) and a current collecting part (32), the pole part (31) is vertically arranged in the center of the current collecting part (32), the pole part (31) penetrates through the cover plate (4), and a retainer ring (7) is sleeved outside the part, penetrating out of the cover plate (4), of the pole part (31) for positioning; the plate surface of the current collecting part (32) is provided with a plurality of positioning sheets (33) and a plurality of openings (34), and the positioning sheets (33) are vertically arranged on the current collecting part (32) and are arranged on the periphery of the pole part (31); a plurality of second positioning grooves (43) are formed in the cover plate (4), the second positioning grooves (43) correspond to the positioning pieces (33), and the positioning pieces (33) are inserted into the second positioning grooves (43).

2. The unitary current collector and cover plate connection structure of an energy storage element according to claim 1, wherein: the positioning piece (33) is formed by tearing off the plate surface of the current collecting part (32) and bending upwards, and the bottom side edge of the positioning piece (33) is connected with the plate surface of the current collecting part (32); the collecting part (32) is provided with an opening (34) corresponding to the tearing part of the positioning sheet (33).

3. The unitary current collector and cover plate connection structure of an energy storage element according to claim 1, wherein: the pole part (31), the current collecting part (32) and the positioning piece (33) are integrally formed.

4. The unitary current collector and cover plate connection structure of an energy storage element according to claim 1, wherein: a first positioning groove (35) is formed in the outer peripheral surface of the pole part (31), and the retainer ring (7) is clamped in the first positioning groove (35).

5. The unitary current collector and cover plate connection structure of an energy storage element according to claim 1, wherein: a first sealing element (5) is arranged between the pole part (31) and the cover plate (4), and the first sealing element (5) is sleeved on the periphery of the pole part (31).

6. The unitary current collector and cover plate connection structure of an energy storage element according to claim 5, wherein: a groove (51) with a downward opening is formed in the first sealing element (5), a first inclined surface (52) is arranged on the side surface of the groove (51) close to the pole part (31), and the first inclined surface (52) inclines downwards and inwards from top to bottom.

7. The unitary current collector and cover plate connection structure of an energy storage element according to claim 5, wherein: the first sealing element (5) is a V-shaped ring or a Y-shaped ring, a V-shaped groove (51) with a downward opening is formed in the lower portion of the first sealing element (5), and two side faces of the V shape are symmetrically arranged.

8. The unitary current collector and cover plate connection structure of an energy storage element according to claim 5, wherein: the lower part of the first sealing element (5) is provided with a trapezoidal groove (51) with an opening facing downwards and a small upper part and a large lower part.

9. The unitary current collector and cover plate connection structure of an energy storage element according to claim 1, wherein: a counter bore (41) is formed in the cover plate (4), and the first sealing element (5) is arranged in the counter bore (41).

10. The current collector and cover plate connection structure of an energy storage element cell as claimed in claim 1, wherein: the cover plate (4) is made of an insulating material.