CN217641556U

CN217641556U - Dysmorphism cylinder battery structure

Info

Publication number: CN217641556U
Application number: CN202221602661.8U
Authority: CN
Inventors: 罗懿; 徐超强; 李博一; 王韬; 吴伟军
Original assignee: Cornex New Energy Co ltd
Current assignee: Cornex New Energy Co ltd
Priority date: 2022-06-24
Filing date: 2022-06-24
Publication date: 2022-10-21
Anticipated expiration: 2032-06-24

Abstract

The utility model discloses a dysmorphism cylinder battery structure, including cylinder casing and apron, be provided with the shoulder hole portion on the top inner wall of cylinder casing, be provided with on the lateral wall of apron with the shoulder hole portion gomphosis adaptation the shoulder shaft portion, the top surface middle part of apron is provided with the recess, the recess radially runs through the lateral wall of apron along the apron, the middle part of recess is equipped with anodal utmost point post, the top surface of anodal utmost point post is less than the top surface of apron, anodal utmost point post is with apron insulating seal, and the bottom is connected with the positive ear in the cylinder casing. The groove structure is designed in the middle of the cover plate, the positive pole column is arranged in the groove, and an avoidance protection design is made for a connecting copper bar when the batteries are grouped, so that the top copper bar and the positive pole column are prevented from being stressed and deformed when the cylindrical batteries are axially loaded, and the axial loading of the cylindrical batteries becomes possible; through the ladder gomphosis of ladder axial region and ladder hole portion, realize cylinder casing and apron fixed connection, further strengthen the axial bearing capacity of whole cylinder battery.

Description

Dysmorphism cylinder battery structure

Technical Field

The utility model relates to a cylinder battery technical field, concretely relates to dysmorphism cylinder battery structure.

Background

With the rapid development of electric vehicles, the technology of batteries is also breaking through, and CTC (Cell to tasks, battery integration scheme) is a process of directly integrating battery cells into vehicle Chassis. The novel energy vehicle further deepens the integration of a battery system, a power system and a chassis of the electric vehicle, reduces the number of parts, saves space, improves structural efficiency, greatly reduces vehicle weight, increases battery endurance mileage and is considered as a key core technology for determining the success or failure of new energy vehicles in the next stage.

The CTC technology needs to make a cell (or a module) have a load-bearing capacity as a part of a structural member, an application scenario needs to bear the weight of a cockpit, and an existing cell structural design is only to optimize the strength of a material, so that the cost selection limitation exists. Therefore, a new structural design is required to improve the axial load strength of the battery cell (or module).

Disclosure of Invention

The to-be-solved technical problem of the utility model is to provide a dysmorphism cylinder battery structure, the axial bearing capacity of reinforcing cylinder battery structure promotes the development of CTC technique and uses, saves vehicle chassis space, improves structural efficiency.

In order to solve the technical problem, the utility model provides a dysmorphism cylinder battery structure, including cylinder casing and apron, cylinder casing is the cylindric of top end opening bottom seal, be provided with the shoulder hole portion on cylinder casing's the top inner wall, be provided with on the lateral wall of apron with the shoulder shaft portion of shoulder hole portion gomphosis adaptation makes the apron lid closes cylinder casing's top, the shoulder shaft portion includes vertical side and horizontally bottom surface, it has the seal groove to open on the side, the embedded sealing washer that is equipped with of seal groove, the top surface middle part of apron is provided with the recess, the recess is followed radially running through of apron the lateral wall of apron, the middle part of recess is equipped with anodal utmost point post, the top surface of anodal utmost point post is less than the top surface of apron, anodal utmost point post with the apron is insulating sealed, and the bottom with anodal ear in the cylinder casing is connected.

In the special-shaped cylindrical battery structure, the groove structure is designed in the middle of the cover plate, the positive pole column is arranged in the groove, and an avoidance protection design is performed on a connecting copper bar when the batteries are grouped, so that the top copper bar and the positive pole column are prevented from being stressed and deformed when the cylindrical battery is axially loaded, the axial loading of the cylindrical battery becomes possible, and the axial loading of the cylindrical battery is realized; in addition, the cylindrical shell and the cover plate are fixedly connected through the step embedding of the step shaft part and the step hole part, and the axial bearing capacity of the whole cylindrical battery is further enhanced.

As the utility model discloses the improvement of dysmorphism cylinder battery structure, be provided with the strengthening rib on the lateral wall surface of cylinder casing, the strengthening rib is followed the axial of cylinder casing is arranged. The axial strengthening rib further increases the axial bearing capacity and the structural strength of battery and module, has increased electric core system's security and life.

Furthermore, the reinforcing ribs are uniformly arranged at intervals in the circumferential direction of the cylindrical shell, and the cross sections of the reinforcing ribs are triangular, fan-shaped or rectangular.

Further, the reinforcing ribs are formed by protruding the side wall surface of the cylindrical shell outwards, and the height of the reinforcing ribs is not more than one third of the radius of the cylindrical shell.

Furthermore, the cylindrical shell is of an integrally formed structure, and the thickness of the side wall of the cylindrical shell is larger than that of the bottom wall. The side wall is a main axial bearing part, and the thickness is properly thickened to increase the bearing capacity.

As the utility model discloses another kind of improvement of dysmorphism cylinder battery structure, anodal utmost point post is the long circle, and length direction follows the radial arrangement of apron. The shape of the anode pole is changed into the long round strip shape, so that the anode pole is suitable for the long strip-shaped structure of the groove and is convenient to arrange.

As the utility model discloses special-shaped cylinder battery structure's another improvement, the shoulder hole portion with the shoulder shaft portion all has the two-stage step. The two stages of steps are correspondingly embedded with each other and nested in multiple stages respectively, so that the matching and fixing reliability of the cylindrical shell and the cover plate is enhanced, a plurality of axial bearing surfaces can be provided, and the axial bearing capacity is high.

Further, the step shaft portion comprises a first step and a second step, and the side faces of the first step and the second step are provided with the sealing groove and the sealing ring. And a sealing ring is arranged on the embedding surface of each step, so that the sealing and isolating capacity is improved.

In conclusion, by adopting the special-shaped cylindrical battery structure, the whole cylindrical battery is reasonable in structural design and strong in axial bearing capacity, so that the integration of a battery system, an electric vehicle power system and a chassis is facilitated, and the development of a CTC (China traffic control) technology is promoted.

Drawings

In the drawings:

fig. 1 is a three-dimensional structure diagram of the special-shaped cylindrical battery structure of the present invention.

Fig. 2 is a sectional view of the special-shaped cylindrical battery structure of the present invention.

Fig. 3 is the structure diagram of the special-shaped cylindrical battery structure of the present invention, in which the stepped shaft portion has two steps.

In the figure, 1, a cylindrical shell; 11. reinforcing ribs; 2. a cover plate; 21. a groove; 3. a stepped hole portion; 4. a stepped shaft portion; 41. a side surface; 42. a bottom surface; 43. a sealing groove; 44. a seal ring; 45. a first step; 46. a second step; 5. a positive pole column; 6. and a positive tab.

Detailed Description

The following describes the present invention with reference to the accompanying drawings. It should be noted that the description of the embodiments is provided to help understanding of the present invention, but the present invention is not limited thereto.

Example 1

Fig. 1-3 show the utility model relates to a dysmorphism cylinder battery structure. As shown in fig. 1 and 2, the special-shaped cylindrical battery structure comprises a cylindrical shell 1 and a cover plate 2, the cylindrical shell 1 is cylindrical with a top opening and a bottom end sealed, a step hole portion 3 is arranged on the inner wall of the top end of the cylindrical shell 1, a step shaft portion 4 matched with the step hole portion 3 in an embedded mode is arranged on the outer side wall of the cover plate 2, the cover plate 2 covers the top end of the cylindrical shell 1, the step shaft portion 4 comprises a vertical side face 41 and a horizontal bottom face 42, a sealing groove 43 is formed in the side face 41, a sealing ring 44 is embedded in the sealing groove 43, a groove 21 is formed in the middle of the top face of the cover plate 2, the groove 21 radially penetrates through the side wall of the cover plate 2 along the cover plate 2, a positive pole 5 is arranged in the middle of the groove 21, the top face of the positive pole 5 is lower than the top face of the cover plate 2, the positive pole 5 is insulated and sealed with the cover plate 2, and the bottom end of the positive pole 6 in the cylindrical shell 1 is connected.

During the use, arrange this cylinder battery in groups, utilize the copper bar to establish ties or parallelly connected with each cylinder battery in recess 21, notice the high top surface that also is less than apron 2 of copper bar, when battery module integration bears on the chassis like this, the axial force is used in the recess 21 both sides of apron 2, avoid anodal utmost point post 5 and connection structure, then the bottom surface 42 effect that the axial force passes through ladder gomphosis structure is on the lateral wall of cylinder casing 1, because cylinder casing 1 is the tube-shape, bearing capacity is stronger, realize that every cylinder battery monomer all has axial bearing capacity, also have stronger bearing capacity after the integration is the module, be convenient for vehicle chassis integrated design, and the space is saved.

Optionally, the outer surface of the sidewall of the cylindrical shell 1 is provided with a reinforcing rib 11, and the reinforcing rib 11 is arranged along the axial direction of the cylindrical shell 1. Axial strengthening rib 11 further increases the axial bearing capacity and the structural strength of battery and module, has increased electrical core system's security and life.

As shown in fig. 1, the reinforcing ribs 11 are formed by outwardly projecting the side wall surface of the cylindrical casing 1, and the height of the reinforcing ribs 11 is not more than one third of the radius of the cylindrical casing 1. The reinforcing ribs 11 are uniformly arranged at intervals in the circumferential direction of the cylindrical shell 1, and the cross sections of the reinforcing ribs 11 are triangular, fan-shaped or rectangular.

In order to further increase the bearing capacity of the cylindrical shell 1, the cylindrical shell 1 is of an integrally formed structure, and the thickness of the side wall of the cylindrical shell 1 is greater than that of the bottom wall. The side wall is a main axial bearing part, and the thickness is properly thickened to increase the bearing capacity.

As shown in fig. 3, each of the stepped hole portion 3 and the stepped shaft portion 4 has two steps. Through the corresponding mutual gomphosis of two-stage step respectively, multistage nestification strengthens cylindrical shell 1 and apron 2 cooperation fixed reliability, also can have a plurality of axial loading faces, and axial bearing capacity is strong.

The stepped shaft portion 4 includes a first step 45 and a second step 46, and a seal groove 43 and a seal ring 44 are provided on the side faces 41 of the first step 45 and the second step 46. And a sealing ring 44 is arranged on the embedding surface of each step, so that the sealing and isolating capacity is improved.

Optionally, the positive electrode post 5 is oblong, and the length direction of the positive electrode post is arranged along the radial direction of the cover plate 2. The shape of the anode pole 5 is changed into the long round strip shape, so that the anode pole is adapted to the long strip-shaped structure of the groove 21 and is convenient to arrange. The cover plate 2 is also provided with a liquid injection hole, an explosion-proof hole, a label and other structures.

In order to facilitate the putting in and wiring of the copper bar, horn-shaped openings are arranged at two ends of the groove (21).

In addition, the implementation manner of the connection between the positive tab 6 and the positive pole 5 can refer to the current collecting plate welding structure for the cylindrical battery disclosed in the specification of the chinese patent CN109088037a, the lithium ion cylindrical battery disclosed in the specification of the chinese patent CN110600795a, and the processing method thereof.

Finally, it should be noted that: the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting the protection scope thereof, and although the present invention is described in detail with reference to the above embodiments, those skilled in the art should understand that: after reading the present disclosure, those skilled in the art can make various changes, modifications and equivalents to the embodiments of the present disclosure, which are within the scope of the appended claims.

Claims

1. The utility model provides a dysmorphism cylinder battery structure, its characterized in that, includes cylinder casing (1) and apron (2), cylinder casing (1) is the cylindric of top end opening bottom seal, be provided with step hole portion (3) on the top inner wall of cylinder casing (1), be provided with on the lateral wall of apron (2) with step hole portion (3) gomphosis adaptation's ladder axial region (4), make apron (2) lid closes the top of cylinder casing (1), ladder axial region (4) include vertical side (41) and horizontally bottom surface (42), it has seal groove (43) to open on the side (41), the embedded sealing washer (44) that is equipped with in seal groove (43), the top surface middle part of apron (2) is provided with recess (21), recess (21) are followed the radial run through of apron (2) the lateral wall of apron (2), the middle part of recess (21) is equipped with anodal utmost point post (5), the top surface of anodal utmost point post (5) is less than the top surface of anodal utmost point post (2), anodal utmost point post (5) with apron (2) are insulating, and the sealed with the interior ear of cylinder casing (6) is connected.

2. The specially-shaped cylindrical battery structure according to claim 1, wherein the outer surface of the side wall of the cylindrical shell (1) is provided with a reinforcing rib (11), and the reinforcing rib (11) is arranged along the axial direction of the cylindrical shell (1).

3. The specially-shaped cylindrical battery structure according to claim 2, wherein the reinforcing ribs (11) are uniformly spaced in the circumferential direction of the cylindrical shell (1), and the cross section of the reinforcing ribs (11) is triangular, fan-shaped or rectangular.

4. The specially-shaped cylindrical battery structure according to claim 2, wherein the reinforcing ribs (11) are formed by outwardly protruding side wall surfaces of the cylindrical case (1), and the height of the reinforcing ribs (11) is not more than one third of the radius of the cylindrical case (1).

5. The specially-shaped cylindrical battery structure according to claim 1 or 2, wherein the cylindrical shell (1) is an integrally-formed structure, and the thickness of the side wall of the cylindrical shell (1) is greater than that of the bottom wall.

6. The specially shaped cylindrical battery structure according to claim 1, wherein the positive electrode post (5) is oblong and arranged with its length direction in the radial direction of the cover plate (2).

7. The shaped cylindrical battery structure according to claim 1, wherein the stepped hole portion (3) and the stepped shaft portion (4) each have two steps.

8. The specially shaped cylindrical battery structure according to claim 7, characterized in that the stepped shaft portion (4) comprises a first step (45) and a second step (46), and the sealing groove (43) and the sealing ring (44) are disposed on the side faces (41) of the first step (45) and the second step (46).

9. The shaped cylindrical battery structure according to claim 1, wherein both ends of the groove (21) are provided with trumpet-shaped openings.